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Renton Municipal Airport ATCT Siting Study Final Report
July 24, 2026 FINAL Renton Municipal Airport | ATCT Siting Study Report | FINAL 1 Page Intentionally Left Blank Renton Municipal Airport | ATCT Siting Study Report | FINAL 2 Renton Municipal Airport Air Traffic Control Tower Siting Study Report Prepared for Renton Municipal Airport 243 W. Perimeter Road Renton, WA 98056 Final Report July 2026 Prepared by 1201 Third Avenue, Suite 2800 Seattle, WA 98101 In cooperation with Quadrex Aviation, LLC AJT Engineering, Inc. Century West Engineering HWA Geosciences, Inc. Connico, Inc. The preparation of this document was flnanced, in part, through a planning grant from the Federal Aviation Administration (FAA) as approved under the Airport and Airway Improvement Act of 1982. The contents of this report refiect the views of WSDOT, which is responsible for the facts and the accuracy of the data depicted herein, and do not necessarily refiect the official views or policy of the FAA. Acceptance of this report by the FAA does not in any way constitute a commitment on the part of the United St ates to participate in any development depicted herein, nor does it indicate that the proposed development is environmentally acceptable in accordance with applicable public laws. Renton Municipal Airport | ATCT Siting Study Report | FINAL 3 Page Intentionally Left Blank Renton Municipal Airport | ATCT Siting Study Report | FINAL 4 Renton Municipal Airport ATCT Siting Study Report Table of Contents Renton Municipal Airport Air Traffic Control Tower Siting Study Report ............................ 2 Executive Summary ....................................................................................................... 8 Section 1: Introduction .................................................................................................. 8 Renton Municipal Airport ............................................................................................ 8 Air Traffic Control Tower Siting Study Project ................................................................ 9 Section 2: Background .................................................................................................. 9 Section 3: Air Traffic Control Tower Site Options ............................................................ 10 ATCT Site Overview .................................................................................................. 10 ATCT Site 1 Overview ............................................................................................. 12 ATCT Site 2 Overview ............................................................................................. 14 ATCT Site 3 Overview ............................................................................................. 16 ATCT Site 4 Overview ............................................................................................. 18 FAA Order Siting Requirements ................................................................................. 20 Airspace Analysis ................................................................................................. 20 Title 14 Code of Federal Regulations Part 77 ........................................................ 20 Source: Kimley-Horn, 2026................................................................................. 25 Existing Instrument Approach Procedure Analysis ............................................... 26 Airport Design Approach Surface Analysis ........................................................... 27 Section 4: Site Access ................................................................................................. 29 Background ............................................................................................................. 29 FAA Site Access Requirements ................................................................................. 29 City of Renton Site Access Requirements .................................................................. 30 Section 5: Site Utilities ................................................................................................ 31 Background ............................................................................................................. 31 Renton Municipal Airport | ATCT Siting Study Report | FINAL 5 Utilities Review ........................................................................................................ 31 ATCT Site 1 Utilities Review .................................................................................... 31 ATCT Site 2 Utilities Review .................................................................................... 35 ATCT Site 3 Utilities Review .................................................................................... 36 ATCT Site 4 Utilities Review .................................................................................... 37 Section 6: Right-of-Way (ROW) ..................................................................................... 38 Summary ................................................................................................................ 38 Detailed ROW Review .............................................................................................. 38 ATCT Site 1 ROW Review ........................................................................................ 38 ATCT Site 2 ROW Review ........................................................................................ 39 ATCT Site 3 ROW Review ........................................................................................ 39 ATCT Site 4 ROW Review ........................................................................................ 39 Conclusion .............................................................................................................. 40 Section 7: Geotechnical .............................................................................................. 40 Summary ................................................................................................................ 40 Conclusions and Recommendations ........................................................................ 41 Section 8: Land Use .................................................................................................... 42 Overview ................................................................................................................. 42 ATCT Site 1 Land Use Review .................................................................................... 43 ATCT Site 2 Land Use Review .................................................................................... 44 ATCT Site 3 Land Use Review .................................................................................... 44 ATCT Site 4 Land Use Review .................................................................................... 45 Section 9: ALP Evaluation ............................................................................................ 46 Overview ................................................................................................................. 46 ATCT Site 1 ALP Review ............................................................................................. 46 ATCT Site 2 ALP Review ............................................................................................. 47 ATCT Site 3 ALP Review ............................................................................................. 47 ATCT Site 4 ALP Review ............................................................................................. 48 ATCT Site Selection and ALP update .......................................................................... 48 Renton Municipal Airport | ATCT Siting Study Report | FINAL 6 Section 10: Environmental ........................................................................................... 48 Summary ................................................................................................................ 48 Section 11: Cost Estimates .......................................................................................... 49 Section 12: Financial Feasibility ................................................................................... 50 Section 13: FAA SRM ................................................................................................... 53 Section 14: Summary .................................................................................................. 53 Appendix .................................................................................................................... 55 Appendix A. Consultant Site Visit Meeting (Agenda/Trip report) ................................... 56 Appendix B. Site Access Plan Sheets ......................................................................... 57 Appendix C. S Site Utility Memo and Plan Sheets ....................................................... 58 Appendix D. Geotechnical Summary Memo ............................................................... 59 Appendix E. Environmental Overview Memo .............................................................. 60 Appendix F. Project Cost Estimate ............................................................................. 61 Appendix G. Financial Feasibility Analysis .................................................................. 62 Appendix H. FAA SRM Meeting Minutes ..................................................................... 63 Appendix I. Updated ALP Drawing w/”Pen and Ink” Change ......................................... 64 List of Tables Table 1-Part 77 Analysis of Potential ATCT Locations .................................................. 21 Table 2-Existing Published Instrument Approach Procedures at RNT ......................... 26 Table 3: Site 1A Utilities Summary.............................................................................. 32 Table 4: Site 1C Utilities Summary ............................................................................. 33 Table 5: Site 1D Utilities Summary ............................................................................. 34 Table 6: Site 2A Utilities Summary.............................................................................. 35 Table 7: Site 2B Utilities Summary.............................................................................. 36 Table 8: Site 3A Utilities Summary.............................................................................. 36 Table 9: Site 3B Utilities Summary.............................................................................. 37 Table 10: Site 4A Utilities Summary ............................................................................ 37 Table 11: Study Sites Land Use and Zoning details ..................................................... 42 Table 12: Environmental Overview Summary ............................................................. 49 Table 13: Project Cost Estimate ................................................................................. 50 Renton Municipal Airport | ATCT Siting Study Report | FINAL 7 Table 14: Airport Cash Flow Analysis Summary with Future Scenario Grants and Contributions ............................................................................................................ 52 List of Figures Figure 1-General ATCT Site Locations ......................................................................... 11 Figure 2-Site 1 Potential ATCT Locations .................................................................... 13 Figure 3-Site 2 Potential ATCT Locations .................................................................... 15 Figure 4-Site 3 Potential ATCT Locations .................................................................... 17 Figure 5-Site 4 Potential ATCT Location ...................................................................... 19 Figure 6-Site 1 Part 77 Transitional Surface Elevations ............................................... 22 Figure 7-Site 2 Part 77 Transitional Surface Elevations ............................................... 23 Figure 8-Site 3 Part 77 Transitional Surface Elevations ............................................... 24 Figure 9-Site 4 Part 77 Transitional Surface Elevations ............................................... 25 Figure 10-Site 3 FAA AC 150/5300-13B Approach and Departure Surfaces .................. 28 Figure 11-ATCT Sites and Zoning ................................................................................ 43 Figure 12 - Renton Municipal Airport, Airport Layout Drawing ..................................... 46 Renton Municipal Airport | ATCT Siting Study Report | FINAL 8 Executive Summary Renton Municipal Airport have completed an ATCT siting study to identify the location for a new ATCT at the airport. The preferred site location selected is Site 1C, which is located adjacent to and west of the existing control tower, within the existing parking lot that serves the facility. Sites 1A and 1D reserved as back-up sites. Both of the back-up sites are also in close proximity to the existing ATCT. This process was initiated in the summer of 2025 and concluded in the summer of 2026. A total of four site locations were evaluated during the siting process, with several subsites within each of the 4 site locations. FAA representatives of the Western S ervice Area and Renton Municipal Airport participated in the sitting and SRM activities at the airport on April 21 and April 22, 2026. The purpose of this report is to document the site selection process used to determine the location for a new ATCT at the airport. This process included examining different sites and proposing an overall best option for RNT while providing clear alternatives with their opportunities and constraints. This process included following the current FAA site selection requirements, FAA Order 6480.4C, Siting Airport Traffic Control Towers. Section 1: Introduction Renton Municipal Airport The Renton Municipal Airport (RNT) is a General Aviation Airport located on the south shore of Lake Washington in Renton, Washington serving the City of Renton and neighboring communities. The airport has one runway, Runway 16/34, and is 5,382 feet in length and 200 feet wide. The airport is comprised of approximately 170 acres of land. The airport serves approximately 300 based aircraft, with approximately 100,000 operations annually. There is also a Seaplane base at the airport that uses Lake Washington for take-offs and landings. The airport provides regional airport services for air charter, air taxi, corporate fiights, business, and recreational fiyers. Several operators offer charter service to the San Juan Islands, Vancouver Island, and lower British Columbia, and sightseeing tours of Seattle. Flight instruction and pilot services are provided through the airport's flxed-base operators (FBOs). US Customs and Border Patrol services are available with 24-hour notice. The airport has a number of key tenants, including The Boeing Company, whose aircraft production factory is adjacent to the airport and builds/assembles 737 aircraft. The airport Renton Municipal Airport | ATCT Siting Study Report | FINAL 9 is also home to ACE Aviation, Boeing Employees Flying Association (BEFA), Vesper Aviation, Rainer Flight Service and others. The existing Air Traffic Control Tower (ATCT) has an air traffic controller on duty daily at the following times: • 7 AM to 8 PM (October 1 - April 30) • 7 AM to 9PM (May 1 - September 30) Air Traffic Control Tower Siting Study Project RNT is seeking to replace its existing ATCT to accommodate existing and future aviation demand. The existing tower has reached the end of its useful life, has signiflcant structural challenges, does not meet current tower design standards/requirements, and does not have the space to accommodate the new components to support Next-Gen upgrades. This project includes the Planning and Siting Services associated with the site evaluation of a new ATCT at RNT. The consulting services provided shall comply with Federal Aviation Administration (FAA) Order 6480.4C (Draft – Approved for Use), Airport Traffic Control Tower Siting Process, FAA Order 7210.78, FCT New Start & Replacement Tower Process, and other relevant FAA circulars and policies. Section 2: Background The existing ATCT is located on the west side of Runway 16/34 at approximately mid-fleld, adjacent to Taxiway A5, and is 55 feet tall. The control tower is operated daily from October 1st through April 30th from 7:00 AM until 8:00 PM, and from May 1st through September 30th, from 7:00 AM until 9:00 PM. RNT’s has had an operating ATCT since 1943, with the current ATCT in operation since 1962, serving as a vital link for Boeing 737 production and general aviation activities. The tower, located under the busy Class B airspace of Sea-Tac International, faced potential closure in 2013 due to federal budget cuts and ongoing disputes regarding the city-owned facility's maintenance. A project kick-off meeting was held at the Airport and included Airport Management and the consultant team. A copy of the kick-off meeting presentation and after site review report are included in Appendix A. Renton Municipal Airport | ATCT Siting Study Report | FINAL 10 Section 3: Air Traffic Control Tower Site Options ATCT Site Overview During the proposal and scoping phase of this project, four potential sites were identifled. These initial sites were identifled in collaboration with the local Air Traffic Controller (ATC) staff and airport management. Only the west side of the Airport was considered viable for the new ATCT because the traffic pattern at RNT is east of the runway. Therefore, ATCT sites on the east side of the Airport would create a situation where controllers would need to look behind them to see local traffic. Except for Site 4, multiple locations for the new ATCT were identifled within each of the three Sites 1-3. The following subsections present the locations of each site. Each location on each site is represented by a 30-foot square, which will accommodate the tower shaft and provide a buffer for construction of the footings required for the new ATCT. Figure 1 illustrates generally the four identifled site locations. Greater detail for each of the sites are found in the subsequent subsections. Renton Municipal Airport | ATCT Siting Study Report | FINAL 11 Figure 1-General ATCT Site Locations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 12 ATCT Site 1 Overview Site 1 is where the existing ATCT is located. Site 1 includes box hangars immediately north and south of the existing ATCT (Renton Airport Building 622 and Building 608, respectively). Both hangars are owned by the Airport. If these locations are selected, the existing hangar buildings could be removed to make room for a new ATCT. Four potential ATCT locations were identifled within Site 1. A brief narrative of each location follows, and Figure 2 illustrates the various locations where a new ATCT could be located within Site 1. • Site 1A: This site is located west and north of the existing ATCT. It is located behind Hangar Building 622 near the Airport Operations Area (AOA) fence along West Perimeter Road. • Site 1B: The existing ATCT is located at Site 1B. However, the new ATCT is shown to be shifted slightly to the east to minimize the required height of the ATCT. This location was removed from consideration because it would require a temporary ATCT during the construction of the new ATCT and this was determined not to be a viable solution. • Site 1C: This location is in the current ATCT parking lot, slightly south of the existing ATCT. • Site 1D: This site is located within the footprint of Building 608. Building 608 would need to be removed to accommodate Site 1D. The location of Site 1D provides a full Airplane Design Group I taxilane object-free area between Building 608 and Building 600 to the south. During the siting evaluation with the FAA and VISTA team, the Site 1D location was shifted to the west outside of the footprint of Building 608. Renton Municipal Airport | ATCT Siting Study Report | FINAL 13 Figure 2-Site 1 Potential ATCT Locations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 14 ATCT Site 2 Overview The existing Airport maintenance building is located with the Site 2 area. The Airport maintenance building (Renton Building 790) is an old Quonset Hut and is designated to be demolished on the Airport Layout Plan drawing. Site 2 has been plagued by settling issues of the existing ground impacting the existing facilities in the areas (also see Section 7). Site 2 also includes a highly utilized AOA vehicle gate. The access to West Perimeter Road from the airfleld is planned to remain in order to accommodate airport users. Two potential ATCT locations were identifled within Site 2. A brief narrative of each location follows, and Figure 3 illustrates the two locations where a new ATCT could be located within Site 2. • Site 2A: This site takes advantage of the demolition of Building 790 (Quonset Hut) and places the new ATCT in the center of the existing building footprint. • Site 2B: This site features the new ATCT just inside of the AOA fence adjacent to the fuel facility and closer to Taxiway A. This location would require reconflguration of the fuel facility to accommodate the new ATCT. The eastward shift of Site 2B, relative to Site 2A, is to move the ATCT closer to the Runway and Taxiway A, reducing the height of the ATCT needed to see over airport buildings and parked aircraft. Renton Municipal Airport | ATCT Siting Study Report | FINAL 15 Figure 3-Site 2 Potential ATCT Locations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 16 ATCT Site 3 Overview Site 3 is located approximately adjacent to the Runway 16 threshold (physical end of the runway). Initially conceived as taking advantage of underutilized and undeveloped space on the Airport, Site 3 is located at the north end of the Airport, near Lake Washington. This site also would provide for better visibility of seaplanes landing and departing from the seaplane base on Lake Washington. This area previously had an operating restaurant on site that ceased operations more than 20 years ago. This site is also adjacent to the dock and ramp for the Wiley Post Memorial Seaplane Base (W36). The Seaplane base is a separate facility from RNT, but it is accessed from RNT and seaplanes park and are maintained at RNT. Two potential ATCT locations were identifled within Site 3. A brief narrative of each location follows. Figure 4 illustrates the two locations where a new ATCT could be located within Site 3. • Site 3A: This site is located within the grassy area, which is where the restaurant was previously located. This site is located on a small hill and located closer to Lake Washington. • Site 3B: This site is south of the proposed 3A location to site the new ATCT outside of the Shoreline Jurisdiction. The Shoreline Jurisdiction is a development limitation that extends 200 feet from the Washington Lake shoreline and is protected under the Washington Shoreline Management Act. Renton Municipal Airport | ATCT Siting Study Report | FINAL 17 Figure 4-Site 3 Potential ATCT Locations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 18 ATCT Site 4 Overview Site 4 is located west of Rainier Avenue in an approximate midfleld location, west of the existing ATCT. This location is identifled as a small parcel of land that is currently not owned by the Airport or City of Renton. The property has been available for sale during portions of this study, while as of July, 2026 the property is currently not listed for sale. This site is at a higher ground elevation than the Airport and, therefore, was considered as this location could potentially result in a lower overall ATCT structure height. Site 4 would also enable the existing ATCT site to be used for revenue producing aeronautical use. As additional analysis was completed for the study, it was determined that to meet line of site requirements, the ATCT structure on this site would likely be taller than those sites on the airport property. Due to the existing trees and airport facilities, a taller tower is required for this site making it unviable. In addition, there are steep slopes associated with some of this parcel as well as an environmentally sensitive area and some signiflcant utilities (see also Sections 5 and 10). As a result, only one location was identifled (see Figure 5). Renton Municipal Airport | ATCT Siting Study Report | FINAL 19 Figure 5-Site 4 Potential ATCT Location Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 20 FAA Order Siting Requirements Airspace Analysis All potential sites were analyzed from an airspace perspective. The sites were reviewed against Title 14 Code of Federal Regulations Part 77 (Part 77) obstacle identiflcation surfaces and analyzed using FAA’s Terminal Area Route Generation Evaluation and Traffic Simulation (TARGETS) software to determine if the new ATCT locations would impact existing published instrument approach procedures. With Site 3 being near the runway threshold, and on the approach side of the displaced threshold additional analysis was warranted against FAA AC 150/5300-13B (AC-13B) airport design surfaces, speciflcally the Approach and Instrument Departure Obstacle Clearance Surfaces. Title 14 Code of Federal Regulations Part 77 All sites are within the horizontal boundary of the Transitional Surface. The Transitional surface starts at the same elevation as the edge of the Primary Surface and increases in elevation at a 7:1 slope until it reaches an elevation of 150 feet above Airport elevation where it connects with the Horizontal Surface. In the case of RNT, the Airport elevation is 32 feet Above Mean Sea Level (AMSL), and the Horizontal Surface is 182 feet AMSL. ATCT heights vary at each location to provide a clear line of sight to all movement areas on the Airport. For all locations and at all heights, the new ATCT will penetrate the Part 77 Transitional Surface. Table 1 shows the estimated ground elevation, ATCT overall height in AMSL, and Part 77 Transitional Surface elevation. Figures 6- 9 depict the potential ATCT sites and the Part 77 Transitional Surface elevations. The existing ATCT penetrates the Part 77 Transitional Surface. Additionally, ATCT is a flxed- by-function feature at an airport and therefore can penetrate the Part 77 Transitional Surface. Therefore, penetrations to the Part 77 Transitional Surface are not a reason to eliminate any of the potential ATCT locations. Renton Municipal Airport | ATCT Siting Study Report | FINAL 21 Table 1-Part 77 Analysis of Potential ATCT Locations Site Ground Elevation ATCT Top Elevation Part 77 Transitional Surface Elevation Penetration Site 1A 25’ 115’ 66.6’ 48.4’ Site 1B 25’ 98’ 50.4’ 47.6’ Site 1C 25’ 97’ 60.8’ 36.2’ Site 1D 25’ 87’ 51.0’ 37.0’ Site 2A 20’ 116’ 86.6’ 29.4’ Site 2B 20’ 116’ 64.2’ 51.8’ Site 3A 26’ 117’ 45.8’ 71.2’ Site 3B 26’ 117’ 46.0’ 71.0’ Site 4 50’ 137’ 106.3’ 30.7’ Notes: Ground elevations are estimated. All elevations are in Above Mean Sea Level (AMSL). Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 22 Figure 6-Site 1 Part 77 Transitional Surface Elevations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 23 Figure 7-Site 2 Part 77 Transitional Surface Elevations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 24 Figure 8-Site 3 Part 77 Transitional Surface Elevations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 25 Figure 9-Site 4 Part 77 Transitional Surface Elevations Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 26 Existing Instrument Approach Procedure Analysis There are three instrument approach procedures published for Renton Airport. Runway 16 has two Global Positioning Satellite (GPS) based area navigation (RNAV) instrument approach procedures and Runway 34 has one. The FAA TARGETS software was used to analyze the potential new ATCT locations against the U.S. Standard for Terminal Instrument Procedures (TERPS) surfaces. The TERPS surfaces are used to identify obstacles that would prevent an instrument approach procedure from being available at an airport and determine what the minimums are for the instrument approach procedure to avoid obstacles and provide safe passage of fiight. Due to the existing obstacle environment around RNT, the existing instrument approach procedures have high minimums (see Table 2). Table 2-Existing Published Instrument Approach Procedures at RNT Runway Procedure Line of Minima Lowest Decision Altitude (DA) / Minimum Descent Altitude (MDA) Lowest Visibility Minimum 16 RNAV GPS Y LNAV MDA 780’ 1-mile Circling MDA 860’ 1 ¼ miles RNAV GPS Z LPV DA 526’ 1 ⅜ miles LNAV/VNAV DA 668’ 1 ⅞ miles 34 RNAV GPS LNAV MDA 840’ 1-mile Circling MDA 860’ 1 ¼ miles Notes: RNAV = Area Navigation; GPS = Global Positioning System; LNAV = Lateral Navigation; LPV = Localizer Performance with Vertical Guidance; VNAV = Vertical Navigation; DA = Decision Altitude; MDA = Minimum Descent Altitude. Source: FAA Digital Terminal Procedures and Airport Diagrams, https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/dtpp/search/results/?cycle=2601&ident=r nt, accessed January 30, 2026. All potential ATCT locations feature AMSL heights that are below the published Decision Altitude (DA) or Minimum Descent Altitude (MDA). This results in favorable analysis for the potential ATCT locations; none of the sites would raise the minimums of the existing published instrument approach procedures. All sites are within the missed approach segments of the published instrument approach procedures associated with both runway ends. The elevation of the missed approach segment begins at the DA or MDA and increases in height. Since all ATCT sites have top elevations lower than the DA or MDA, an increase in minimums is not required. Sites 2 and 3 are within the flnal approach segments of the Runway 16 LNAV and LNAV/VNAV procedures. Additionally, Site 3 is within the flnal approach segment of the Renton Municipal Airport | ATCT Siting Study Report | FINAL 27 Runway 16 LPV procedure. Again, the existing DAs and MDAs are high enough that the potential ATCT in these sites would not create an increase in minimums from existing conditions. Airport Design Approach Surface Analysis As noted above, Site 3 is near the Runway 16 threshold and is on the approach side of the existing 304-foot displayed threshold. Therefore, a more detailed review of approach and departure surfaces, deflned in FAA AC 150/5300-13B, Airport Design, was conducted. Speciflcally, Surfaces 5 and 7 as deflned in Tables 3-4 and 3-5, respectively, of AC-13B were analyzed. Surface 5, formerly known as the Threshold Siting Surface (TSS), is used to deflne the landing threshold of a runway. This surface is to be clear of all obstacles, though limited exceptions may be possible. Surface 5 is applicable to runways where there is a published instrument approach procedure with localizer type directional aid with glidepath guidance (e.g. LPV approach). The slope of this surface is dependent upon the visibility minimums. At RNT, the slope of the surface is 20:1 (runways with visibility minimums greater than ¾ statute mile). Surface 7 is known as the Instrument Departure Surface or Departure Surface. Surface 7 is a complex trapezoidal shaped surface that has two sections. Section 1 features a continuous 40:1 slope. Section 2 is a compound sloping surface that starts at Section 1 and increases to a set horizontal distance or height, whichever is achieved flrst. Surface 7 also matches the size of the TERPS Initial Climb Area (ICA). Figure 10 illustrates Site 3 relative to Surfaces 5 and 7. Neither location is within the lateral limits of these surfaces. Therefore, Sites 3A and 3B do not confiict with the AC-13B approach and departure surfaces. Renton Municipal Airport | ATCT Siting Study Report | FINAL 28 Figure 10-Site 3 FAA AC 150/5300-13B Approach and Departure Surfaces Source: Kimley-Horn, 2026. Renton Municipal Airport | ATCT Siting Study Report | FINAL 29 Section 4: Site Access Background The City of Renton is the Authority having jurisdiction for the site development of the new ATCT with review and concurrence from the FAA. Other stipulations and criteria are speciflc to the Airport as well as FAA criteria for the safety and operation of aircraft. The sites being considered and evaluated for the new ATCT are concentrated in four areas. Site 1 is located near the existing ATCT location. Several possible locations were considered and in general access is similar to the existing conditions. Site 2 is located north of the existing ATCT on Airport property and access would remain similar to the existing conditions. Site 3 is located on the north side of the Airport near Lake Washington and access would remain from the existing Perimeter Road. Site 4 is located outside the airport property across the street from Rainier Avenue N. Access to Site 4 would come from Rainer Avenue N. FAA Site Access Requirements The FAA criteria for the ATCT siting is fully described in FAA Order 6480.4C draft and is focused on air traffic safety and the purpose of the ATCT. The FAA has criteria for line of site, tower vision, space for equipment, Part 77 penetrations, and other airport related elements. General criteria related to the site development of the ATCT are as follows: 1) For towers with no base building, the FAA recommends 2 acres of property for the site. 2) Access to the ATCT must avoid crossing areas of aircraft operations and avoid roads or bridges subject to closures due to high traffic volume, fiash fioods, storm surge, extreme heat or cold, snow, landslides, falling rocks, or other hazards when possible 3) The ATCT parcel of land offered by the landowner to the FAA must have sufficient area to accommodate the ATCT facility and base building (if applicable), parking area, security fence and associated setback, mechanical and electrical yards, staging areas, security fence, future expansion, and other requirements as identifled in the draft Requirements Document Workbook (RDWB) (typically 2 to 5 acres). The parcel of land offered by the landowner must be clear without obstructions. The FAA will not be responsible for the removal of existing structures on a parcel of land or the relocation of facilities not owned by the FAA. • Utilities and Cabling. Connectivity of required cabling and utilities. Renton Municipal Airport | ATCT Siting Study Report | FINAL 30 • Site Access Roadways. Any necessary new or redesigned site access roadways. • Security. The impacts of complying with the latest version of FAA Order 1600.69. • Site Grading Requirements. • Required Stormwater Provisions. 4) The FAA does not recommend penetrations in Part 77 transitional surface but understands that penetrations are almost a certainty with ATCT sites. They do prefer that the ATCT is located in the Horizontal surface if possible. The FAA does their own siting studies and looks at Part 77 penetrations. 5) The ATCT does not need to be within the secure AOA fence. The FAA prefers it not to be unless additional security requirements are needed. City of Renton Site Access Requirements Most site development standards will fall under the City of Renton’s jurisdiction. These are common to the zoning requirements of the city. The following site criteria apply for this zone: 1) Minimum Lot Size = 35,000 sf 2) Maximum Building Height = 50ft, Conditional Use Permit Required 3) Minimum Front Yard = 15 ft 4) Clear Vision Area = 20ft (RMC 4-11-030, Q) Not applicable if not on intersection 5) General (RMC 4-4-095) Industrial Zones are exempt from screening. 6) Minimum Requirements for Loading, Repair, Dumpster, etc. (RMC 4-4-095) 7) Dumpster (RMC 4-4-090) 3 sf per 1000 sf of building for recycling, 6 sf per 1000 sf for trash 8) Parking Requirements depend on the needs of the ATCT. No minimum for IM is stated. Accessible parking will need to be per RMC 4-4-080. Site 3B is within the Shoreline Master Program boundary adjacent to Lake Washington. For that site, additional requirements apply and are not limited to the following: 1) Impact Evaluation Required (EIS) 2) Evaluation of Mitigation Sequencing (Show no adverse impacts to wildlife) 3) Maximum Building Height = 35ft Renton Municipal Airport | ATCT Siting Study Report | FINAL 31 4) Other design Requirements (4-3-090D.) Site is a High Intensity site located at the Airport. 5) Lake Washington Reach J (for shoreline on the Airport property) 6) ATCT is a permissible land use at the airport in the Shoreline Master Plan 4-3- 090E.10.f only because FAA requirement. It is preferred to be outside of buffer. 7) Roads preferred to stay outside Shoreline Master Plan area 8) Parking is not preferred. It might be better to utilize existing parking lot. 9) Minimum 20 ft building setback from OHWM Detailed site access/parking plans for each of the sites are included in Appendix B. Section 5: Site Utilities Background The existing utility infrastructure was evaluated at the four ATCT locations, Sites 1, 2, 3, and 4, with a detailed review at the eight speciflc ATCT sites. This assessment determined the availability of utilities, capacity of each location to support a new facility based on electrical, communications (flber optic), water, storm drainage, sanitary sewer, and natural gas services. The existing utilities were determined through a combination of desktop review, review of Renton Airport basemaps, and City of Renton GIS information. A technical memorandum with additional details, graphics, and information is included in Appendix C. Utilities Review ATCT Site 1 Utilities Review A summary of the utilities review for each site is provided in Tables 3 to 10 below. Renton Municipal Airport | ATCT Siting Study Report | FINAL 32 Table 3: Site 1A Utilities Summary Utility Condition Electrical Existing transformer connection available is 130’ to the southwest or nearest connection 40' southwest to an electrical vault (to be conflrmed in future phase). Communications Existing underground flber optic 50' to the south. Water Existing 12" main 25' west of site. Existing service loop lines and flre suppression main require rerouting around proposed site. Sanitary Sewer Existing 8" line runs under site to manhole 50' north. Rerouting of downstream leg required. Storm Sewer Site has existing storm drainage. Minor reconflguration may be needed. Natural Gas Unknown – There is likely service in the area. More information needed to conflrm. Utility Conflicts Existing water and sanitary sewer lines servicing neighboring facilities confiict with the proposed ATCT placement and require rerouting. Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 33 Table 4: Site 1C Utilities Summary Utility Condition Electric Existing transformer connection available is 90’ to the west or nearest connection 70’ to the north to an electrical vault (to be determined in future phase) Communications Existing underground flber optic 70’ west of site or nearest connection at existing tower (to be determined in future phase) Water Existing 12” main 50' west of site or nearest connection 30’ east at the existing tower (to be determined in future phase) Sanitary Sewer Existing 8" line 25' west of site or 30’ east at the existing tower (to be determined in future phase) Storm Sewer Site has existing storm drainage. Minor reconflguration may be needed to accommodate tower. Natural Gas Unknown – There is likely service in the area. More information needed to conflrm. Utility Conflicts None Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 34 Table 5: Site 1D Utilities Summary Utility Condition Electric Existing transformer connection available is 125’ to the northwest or nearest connection immediately east at 608 hangar (to be determined in future phase). Communications Existing underground flber optic 60' west of site. Water Existing 12” main 45’ west of site or nearest connection immediately east at 608 hanger (to be determined in future phase). Sanitary Sewer Existing 8" line 20' west of site or nearest connection immediately east at 608 hangar (to be determined in future phase) Storm Sewer Site is over existing building to be removed. Expansion of adjacent storm drainage network likely necessary. Natural Gas Unknown – Insufficient Data Utility Conflicts The proposed site is currently occupied by an existing hangar. The hangar and any associated service lines would need to be removed. Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 35 ATCT Site 2 Utilities Review Table 6: Site 2A Utilities Summary Utility Condition Electric Reuse or minor extension of existing service line to current Quonset structure. Existing underground service available 30' west of site is also available. Communications Reuse or minor extension of existing flber optic service line to current Quonset structure possible. Water Reuse or minor extension of existing service line to current Quonset structure possible. Sanitary Sewer Existing service available 15' east of site. Storm Sewer Site has existing storm drainage. Minor reconflguration may be needed. Natural Gas Reuse or minor extension of existing service line to current Quonset structure possible. Existing Conflicts The proposed site is currently occupied by an existing building. The building and any associated service lines would need to be removed. Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 36 Table 7: Site 2B Utilities Summary Utility Condition Electric Existing underground service (with transformer) available 200' west of site. Communications Existing underground flber optic service available 200' west of site. Water Existing 12" main available 25' west of site. Sanitary Sewer Existing service available 50 west of site. Storm Sewer Site has existing storm drainage. Minor reconflguration may be needed. Natural Gas Existing service available 200' west of site. Existing Conflicts None Source: Century West Engineering, 2026 ATCT Site 3 Utilities Review Table 8: Site 3A Utilities Summary Utility Condition Electric Existing underground service is available 90' west of site. Communications Existing flberoptic available on west edge of site. Minor reconflguration of the flber optic line or adjustment of tower location may be needed to address confiict with tower. Water Existing 12" main available on north edge of site. Minor reconflguration of the main or adjustment of tower location may be needed to address confiict. Sanitary Sewer Existing service available 120' west of site. Storm Sewer Site has no existing underground storm drainage. Existing main trunk runs 25' west of site. Natural Gas Existing service is available 75' west of site. Existing Conflicts Existing water main and flber optic line confiict with the proposed ATCT placement and will require rerouting. Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 37 Table 9: Site 3B Utilities Summary Utility Condition Electric Existing underground service available 110' west of site. Communications Existing flberoptic available 45' west of site. Water Existing 12" main available 80' west of site. Sanitary Sewer Existing main available 80' west of site. Storm Sewer Site has existing storm drainage. Approximately 80' of storm drainage pipe would need to be rerouted to accommodate tower. Other minor drainage improvements may be necessary. Natural Gas Existing service available 110' west of site. Existing Conflicts Existing storm line and electrical line confiict with the proposed ATCT placement and will require rerouting. Source: Century West Engineering, 2026 ATCT Site 4 Utilities Review Table 10: Site 4A Utilities Summary Utility Condition Electric Closest known service is 210' east of the site. Service extension requires crossing Rainier Avenue. Additional service may be available west of Rainier. More information needed to conflrm. Communications Closest known service is 210' east of the site. Service extension requires crossing Rainier Avenue. Additional service may be available west of Rainier. More information needed to conflrm. Water Existing 10" main located 25' east of site. Sanitary Sewer Existing main (unknown size) located 95' east of site. Storm Sewer No storm drainage in the immediate vicinity. Nearest existing drainage line 90' east of site. Natural Gas Unknown – Insufficient Data Existing Conflicts None Source: Century West Engineering, 2026 Renton Municipal Airport | ATCT Siting Study Report | FINAL 38 Section 6: Right-of-Way (ROW) Summary The ROW task included analyzing the real property needs for each of the 4 alternative ATCT site locations and providing a general overview of any property needs for each of the potential sites. Sites 1, 2 and 3 are all located within the current airport footprint and are on City of Renton owned property. Site 4 is located outside of the current airport property and would require acquisition of private property to allow for the construction and operation of a new ATCT. In addition, a new control zone would be required that would cross over current public ROW along Rainier Avenue N to allow for utility, power, and communication connections between RNT and a new ATCT on Site 4. For the current property conditions for Sites 1, 2 and 3, the property transfer document wherein the City of Renton acquired the property from the United States government was reviewed. This property transfer occurred September 25, 1947, following the end of World War II war time efforts. The property was transferred via Fee Simple, recording Number 3727523 in King County public records, and has been held by the City since that date. The land was transferred to the City together with buildings, structures, improvements, and personal property listed in the deed. There were speciflc restrictions and reservations placed on the site, referred to as the “airport”, that limited future use to “public airport purposes”. Relocating the existing control tower to a new location within the existing airport-owned property is considered a public airport purpose. Detailed ROW Review ATCT Site 1 ROW Review ATCT Site 1 is located within the airport footprint on City-owned property and adjacent to the current control tower. Two airport-owned box hangars sit on either side of the existing tower. Both would be partially or fully impacted during construction due to [loss of access to Perimeter Road; loss of parking (temporary/permanent); parking requirements of new tower after construction; line of sight to taxiway after construction]. Following completion of the new tower and demolition of the old tower, potential excess areas could be available for rebuilding new hangars or additional parking. Airport staff have indicated that the current hangar tenants are presently on a month-to-month tenancy. This would limit the potential relocation costs associated with displacing a tenant in conjunction with a federally funded project. Renton Municipal Airport | ATCT Siting Study Report | FINAL 39 The existing utilities serving a major power transformer and the tower itself would most likely need to be relocated elsewhere on site. While there may not be the added cost to acquire a new utility easement, the new lines would need to be designed and routed, as well as the potential abandonment of the existing easements. ATCT Site 2 ROW Review ATCT Site 2 is located within the airport footprint on City-owned property at the site of an older Quonset hut-style building which is currently being used by the Renton Airport Maintenance Department. The site inspection and information provided by Airport staff revealed major building settlement in this area. This was noted as being due to an old mill being on this site prior to additional flll being placed on site for the airport needs. Without further analysis, it should be assumed that major geotechnical investigations will be required to site a new facility in this location. The building itself can be demolished, per language in the transfer deed from the government. Testing and possible remediation for contamination at this location will be required as part of the demolition process. Additionally, this site is in proximity to an above-ground fuel tank farm and hangar leased and operated by Ace Aviation, the hanger lease terminated in January 2025. The flnal design and footprint for this site could temporarily impact access and parking for the adjacent hangar and tank farm and/or potentially require the relocation of the tank farm. ATCT Site 3 ROW Review ATCT Site 3 is located within the airport footprint on City-owned property at the site of a former restaurant location. The restaurant building was demolished more than 20 years ago and the land is currently vacant. This site is also located on the shores of Lake Washington. This site provides the least impact to existing tenants with potential exceptions of the Seaplane dock and access for Seaplanes from the North end of the runway, which could potentially be impacted during construction. ATCT Site 4 ROW Review Site 4 is located outside of current airport property limits and is located on private property of approximate 2 acres in size. Property acquisition will be required to plan, design, construct, and operate the new tower with required parking and infrastructure. The identifled property is presently vacant and undeveloped. There are two separate parcels held by one owner totaling 2.42 acres, 105,415 square feet. The King County assessor established the value for tax purposes, of the combined properties to be $2,551,400. A search of comparable sales of properties in the area for market comparison indicates a Renton Municipal Airport | ATCT Siting Study Report | FINAL 40 value in this area closer to $4-5M for similar properties. Comparable sales data was reviewed using CoStar, a national database of real estate sales data. In addition to the land, easements for utilities will be required to connect communication and other essential services to Renton Airport. While many of these can be moved into the public ROW between the new tower and existing airport property, we would need to work with the city to understand any requirements for new utilities in the ROW. We would recommend establishing an acquisition budget of between $4-5M for the property. The cost of appraisal, due diligence, closing costs, and survey would add approximately $150,000 in hard cost for acquisition. If eminent domain is required to complete the transaction, an additional $100,000 should be included in the budget. The duration of the transaction to acquire private land on Site 4 should be 9 to 24 months. Conclusion Sites 1 and 2 will require the demolition and/or relocation of existing airport structures to be replaced by a new control tower structure and use. However, there are no deed restrictions on future airport uses of real property for these three locations. The airport staff indicated no tenants, other than the airport itself, will be occupying any of the structures to be demolished or partially removed. It was conflrmed that all tenants occupy the buildings on a month-to-month tenancy. However, a formal review of lease documents and conditions at the time of site selection will be required to ensure no tenants are eligible for relocation beneflts under FAA guidance for public land projects. Site 4 would require the purchase of land for the design, construction, and operation of a new control tower along with easements to connect utilities between the new ATCT and Renton Airport. The advantage of Site 4 is the creation of a larger footprint for future airport needs. As the airport looks at enterprise opportunities, the city could repurpose the land under the current tower for additional airport and tenant uses. Section 7: Geotechnical Summary HWA GeoSciences Inc. (HWA) completed a site reconnaissance and review of available geotechnical information at four proposed locations for the Air Traffic Control Tower (ATCT) Siting Study project at Renton Municipal Airport in Renton, Washington. The four proposed sites are located on the western portion of the airport as follows: • Site 1: Just north of the existing ATCT Renton Municipal Airport | ATCT Siting Study Report | FINAL 41 • Site 2: Current site of Renton Airport Maintenance Shop (Quonset Building) • Site 3: The northwestern corner of the airport near Lake Washington • Site 4: West side of Rainier Avenue N, west of the existing ATCT The purpose of our work was to evaluate available surface and subsurface information near the proposed sites to summarize the available data and to provide a summary of signiflcant considerations. No explorations were performed for this study. A review of available geotechnical explorations in the vicinity of the four sites resulted in the logs of previously completed explorations near Sites 1, 2, and 3. No previous explorations were identifled near Site 4. Conclusions and Recommendations At the locations of Sites 1, 3, and 4, the available explorations did not extend deep enough to reach competent soils for foundation support. Additional explorations will be required at any of these sites to provide recommendations for foundation design. At Site 2, the explorations performed by HWA, which were conducted and completed as part of a previous contract, closest to the proposed site, encountered very loose wood chip flll to depths of 10 to 15 feet over very soft organic silt to a depth of at least 41.5 feet. The borings performed by GeoDesign, located north of the Rainier Flight Service building, encountered very loose/very soft alluvial deposits to a depth of about 50 to 60 feet, which became medium dense to dense to depths of about 60 to 70 feet where very dense glacial till, suitable for foundation support, was encountered. The soils in the upper 50 to 60 feet are considered liqueflable. Liquefaction is anticipated to be a design consideration at each of the four sites. Based on available information, pile foundations will likely be required for Sites 1, 2, and 3, and also likely required for Site 4. Additionally, Site 4 may have risks associated with slope stability that would need to be considered. Further investigations, consisting of drilled borings, will need to be performed at whichever site is selected. A technical memorandum with additional details, graphics, and information is included in Appendix D. Renton Municipal Airport | ATCT Siting Study Report | FINAL 42 Section 8: Land Use Overview The current zoning for the four site locations is shown in Error! Reference source not found.. Sites 1, 2, and 3 are located within a single parcel and are all governed by the same land use and zoning regulations of the Airport facility, which permit development of an ATCT. Site 4 is located within a separate parcel where the current zoning prohibits the use of an ATCT and would require additional land use approvals, such as a rezone, to allow the use of an ATCT. The applicable zoning classiflcations and land use designations for each site, as set forth in RMC 4-2-060 and RMC 4-3-020, as well as the rezone procedures outlined in RMC 4-9-189, are described below. Table 11: Study Sites Land Use and Zoning details summarizes the zoning and land use details. Table 11: Study Sites Land Use and Zoning details Site Zoning Land Use Overlay Present Use Parcel ID 1 Medium Industrial Employment Area Airport Infiuence Area Air Terminal and Hangars 723059007 2 Medium Industrial Employment Area Airport Infiuence Area Air Terminal and Hangars 723059007 3 Medium Industrial Employment Area Airport Infiuence Area Air Terminal and Hangars 723059007 4 Commercial Arterial Commercial Mixed Use Airport Infiuence Area; Urban Design District D Vacant (Commercial) 9564800170 Source: (City of Renton, 2025; City of Renton IT-GIS, 2025; Renton Municipal Code, 2025). Renton Municipal Airport | ATCT Siting Study Report | FINAL 43 Figure 11-ATCT Sites and Zoning (City of Renton, 2025) Source: City of Renton, 2025. ATCT Site 1 Land Use Review Site 1 is located within the existing footprint of the Renton Municipal Airport (Parcel ID 723059007). The parcel is zoned Medium Industrial (IM), which permits medium-intensity industrial activities including manufacturing, processing, assembly, and warehousing. Municipal airport uses are permitted within the IM district; therefore, development of an ATCT at these locations would not require a rezone or conditional use permit. Renton Municipal Airport | ATCT Siting Study Report | FINAL 44 The site’s land use designation is Employment Area, which accommodates industrial development and a mix of commercial and industrial uses. Typical uses include offices, industrial facilities, warehousing, and manufacturing, with an emphasis on access to transportation networks and transit. The parcel is located within the Airport Infiuence Area (Safety Zone 5) overlay. Proposed structures must comply with applicable use restrictions, height limitations, and other overlay standards. ATCT Site 2 Land Use Review Site 2 is located within the existing footprint of the Renton Municipal Airport (Parcel ID 723059007). The parcel is zoned Medium Industrial (IM), which permits medium-intensity industrial activities including manufacturing, processing, assembly, and warehousing. Municipal airport uses are permitted within the IM district; therefore, development of an ATCT at these locations would not require a rezone or conditional use permit. The site’s land use designation is Employment Area, which accommodates industrial development and a mix of commercial and industrial uses. Typical uses include offices, industrial facilities, warehousing, and manufacturing, with an emphasis on access to transportation networks and transit. The parcel is located within the Airport Infiuence Area (Safety Zone 5) overlay. Proposed structures must comply with applicable use restrictions, height limitations, and other overlay standards. ATCT Site 3 Land Use Review Site 3 is located within the existing footprint of the Renton Municipal Airport (Parcel ID 723059007). The parcel is zoned Medium Industrial (IM), which permits medium-intensity industrial activities including manufacturing, processing, assembly, and warehousing. Municipal airport uses are permitted within the IM district; therefore, development of an ATCT at these locations would not require a rezone or conditional use permit. The land use designation is Employment Area, which accommodates industrial development and a mix of commercial and industrial uses. Typical uses include offices, industrial facilities, warehousing, and manufacturing, with an emphasis on access to transportation networks and transit. The parcel is located within the Airport Infiuence Area (Safety Zone 5) overlay. Proposed structures must comply with applicable use restrictions, height limitations, and other overlay standards. Renton Municipal Airport | ATCT Siting Study Report | FINAL 45 ATCT Site 4 Land Use Review Site 4 is located west of RNT, directly across the street from the existing ATCT, on a vacant parcel (Parcel ID 9564800170). The parcel is zoned Commercial Arterial, which permits a broad range of retail sales, services, and other commercial activities typically located along high-volume traffic corridors. Municipal airport uses are not permitted under the current zoning and would require a rezone to Medium Industrial. The site’s land use designation is Commercial Mixed Use, which supports residential development as part of mixed-use projects and encourages more intensive office and commercial development to foster a vibrant district and expand employment opportunities. Site 4 is also located within the Airport Infiuence Area (Safety Zone 5) overlay, which imposes use restrictions, height limitations for structures and trees, and additional permitting requirements. In addition, the parcel is subject to the Urban Design District D Overlay, which establishes speciflc development and design standards. A rezone would remove the parcel from the Urban Design District D Overlay. Rezone Requirements Rezoning the vacant parcel on which Site 4 is located from Commercial Arterial (CA) to Medium Industrial (IM) would require a legislative review process in accordance with the Renton Municipal Code. Because zoning must be consistent with the City’s Comprehensive Plan, a Comprehensive Plan amendment may be required if the current land use designation does not support industrial uses. The general steps in the rezone process include: • Comprehensive Plan Amendment: Ensure consistency between the proposed zoning and the Future Land Use Map. • Pre-Application Meeting: Consultation with City planning staff to conflrm submittal requirements and review procedures. • Application Submittal: Formal rezone application with supporting materials and fees. • SEPA Review: Environmental review under the State Environmental Policy Act. • Public Notice and Hearing: Public notiflcation, opportunity for comment, and flnal action by the City Council. Approval of a rezone would change the parcel’s zoning designation but would not constitute approval of a speciflc development proposal. Renton Municipal Airport | ATCT Siting Study Report | FINAL 46 Section 9: ALP Evaluation Overview A desktop review of the proposed sites related to future development compatibility, as indicated on the current Airport Layout Plan (ALP), was conducted. An image of the existing ALP drawing is included in Figure 12 below. A summary of the results of this review is included in the following paragraphs. Figure 12 - Renton Municipal Airport, Airport Layout Drawing Source: Kimley-Horn, 2026 ATCT Site 1 ALP Review The proposed ATCT locations within Site 1 do not present any direct confiicts with the current ALP and with planned airport development. The four locations that have been identifled are already designated for aeronautical use, and one of the sites where the current ATCT is found would align with the existing use shown on the ALP. Some considerations for the four sites are listed as follows: • Site 1A – Possibly may impact access to the existing box hangar, as the proposed tower location, access, and parking could impede hangar door operations on the west wall of the hangar. • Site 1B – Proposes demolition and reconstruction of the ATCT on the existing tower site, which would maintain consistency with the ALP and minimize land use changes. • Site 1C – Would require the removal of existing parking spaces and would require adjustments to the roadway access to the hangar building to the south of the existing ATCT (Building 608). Renton Municipal Airport | ATCT Siting Study Report | FINAL 47 • Site 1D – Would require the demolition of the existing seaplane maintenance hangar (Building 608), which may necessitate the relocation of that function to an alternative site elsewhere on airport property. Overall, Site 1 is compatible with the ALP, with impacts primarily limited to localized operational and support-facility considerations rather than confiicts with planned aeronautical development. As a result, minimal updates to the ALP would be required for Site 1, as the proposed ATCT locations remain consistent with existing and planned aeronautical uses. ATCT Site 2 ALP Review The proposed ATCT locations within Site 2 do not present any direct confiicts with the current ALP or with planned airport development. The ALP shows continued aeronautical use in this portion of the airfleld, and the ATCT would be compatible with the two proposed locations for Site 2. • Site 2A – Would be built in the current location of the maintenance building, which is displayed in the ALP to be demolished. • Site 2B – Will require relocation of the existing above-ground fuel tank and will reduce the available airside apron area at the airport. Overall, Site 2 is compatible with the ALP, with some impacts to access of other site elements and impacts to the above ground fuel facility. As a result, minimal updates to the ALP are required for Site 2, as the proposed ATCT locations remain consistent with existing and planned aeronautical uses. ATCT Site 3 ALP Review Site 3 is identifled on the ALP as a “Future Aeronautical Development Area” with supporting information on indicating potential future use for vehicle or aircraft parking. The parcel identifled on the ALP is city-owned. The parcel also contains an existing utility easement that conveys stormwater from areas outside airport property through the property and into Lake Washington. This easement must remain in place. While the ALP does not deflne speciflc facility types for this area, it broadly designates the parcel for aviation related development. A new ATCT could be consistent with this designation, provided that the proposed locations of Site 3A and 3B avoid the stormwater easements and infrastructure. As a result, implementation of the ATCT at Site 3 may necessitate an ALP update to clarify the speciflc facility use and ensure continued protection of the existing stormwater easement. Renton Municipal Airport | ATCT Siting Study Report | FINAL 48 ATCT Site 4 ALP Review Site 4 is currently located outside of airport property boundaries and, as such, does not confiict with any existing ALP features or planned airport development. Because the site is not presently incorporated into the ALP, development at this location would require property acquisition and future ALP updates to refiect the expanded airport footprint. From an ALP perspective, Site 4 does not present a direct confiict; however, its implementation would be contingent on changes to airport property limits. As a result, although no direct ALP confiicts are identifled, acquisition of Site 4 would require a future ALP update to incorporate the modifled airport land acquisition and property boundary. In summary, the four ATCT site alternatives have varying levels of consistency with the current ALP. Sites 1 and 2 are fully compatible with existing and planned aeronautical development and can be implemented with minimal modiflcation to the ALP. Site 3 is generally consistent with its designation as a “Future Aeronautical Development Area”. However, an ALP update may be required to document the speciflc ATCT use. Site 4 does not confiict with planned development but is located outside the current airport property boundaries, and its implementation would require land acquisition to be portrayed in any future ALP updates. Overall, ALP updates would be limited and site speciflc depending on the ATCT location selected. ATCT Site Selection and ALP update Site 1C was selected as the preferred alternative through the detailed siting study process. Sites 1A and 1D were selected as back-up sites to the preferred alternative. The existing ALP has been updated via a “pen and ink” change to include Sites 1C, 1A, and 1D on the full ALP set. A copy of the updated ALP is included in Appendix I Section 10: Environmental Summary An environmental desktop overview was prepared using available online data and mapping (see Appendix F). Table 12 summarizes the flndings. Additional surveys and analyses may be required to support the National Environmental Policy Act (NEPA) document in the next phase. Renton Municipal Airport | ATCT Siting Study Report | FINAL 49 Table 12: Environmental Overview Summary Environmental Resource Summary Water Resources The National Hydrography Dataset indicates that a stream traverses through Site 3 and 4, although there may not be a stream present. Site 3 is near Lake Washington. Protected Species Site 4 has potential for being a protected species habitat. The other sites are disturbed with no potential for habitat. Cultural Resources No listed cultural resources are within any sites. However, all sites are listed as high risk for archaeological resources, and Site 3 overlaps an area mapped as very high risk. Contaminated Soils None of the sites contain known contaminated soils. The unstable soils under Site 2 may complicate construction at this location. Viewshed An ATCT at Sites 1 and 2 would be visible from a small number of properties, in a similar location to the existing ATCT. An ATCT at Sites 3 and 4 would be visible from a larger number of properties. Anticipated Permits A Section 404 Nationwide Permit and a Section 401 Water Quality Certification would be required for Sites 3 and 4 if the mapped stream is present and determined to be jurisdictional by the US Corps of Engineers. A Shoreline Substantial Development Permit would be required for Site 3A due to its proximity to Lake Washington. An Inadvertent Discovery Plan and project reporting will be provided to the Duwamish Tribe for all sites. A copy of the environmental memorandum is located in Appendix E. Section 11: Cost Estimates Kimley-Horn retained Connico as cost consultants to provide an estimate of probable construction cost for the Air Traffic Control Tower Siting Study project at Renton Municipal Airport. The estimate was based on conceptual plans from other similar ATCT projects our team has prepared and other information developed by the consultant team in order to develop an order of magnitude construction cost. No design work was completed in order to support this construction cost estimate. The project scope consists of a new six-level Air Traffic Control Tower (ATCT) at Renton Municipal Airport (RNT). An optional base building for the tower has also been estimated as part of this effort for budget considerations. The preferred site location is site 1C. Renton Municipal Airport | ATCT Siting Study Report | FINAL 50 The estimate of probable cost has been prepared based on information developed under this study efforts as well as evaluating the requirements for other 6-story ATCT designs. A full project cost estimate has been developed by the Consultant team to include all project costs expected for the project including soft costs (environmental, design, Construction Administration/Construction Management, testing, permitting, FAA), and construction costs. The project cost estimate and detailed construction cost estimate are provided in Appendix F. A summary of the costs are included in Table 13 below. Table 13: Project Cost Estimate Renton Airport ATCT Siting Study Soft Costs (Environmental, Engineering, CA, permitting, FAA) $6,925,400 ATCT Construction Costs $11,373,967 Sitework Construction Costs $3,467,463 Base Building Construction Costs $2,753,207 Total Project Cost $23,847,431 Section 12: Financial Feasibility A flnancial feasibility assessment was conducted to evaluate the Airport's capacity to support implementation of a replacement Air Traffic Control Tower (ATCT) and to better understand potential funding strategies for the project. The assessment included a review of six years of flnancial records obtained from the City of Renton's Annual Financial Reports (2018 through 2024), from which airport-speciflc flnancial data were compiled. Historical revenues, expenditures, grants and contributions, and annual surplus or deflcit positions were analyzed to establish a baseline understanding of the Airport's flnancial condition, funding trends, and overall flscal performance. In addition, a review of federal grant funding received during the same period was completed to assess the Airport's history of securing FAA and other aviation-related funding sources. The historical flnancial data were used to develop planning-level forecasts and evaluate the Airport’s potential flnancial capacity to support implementation of a replacement ATCT. Compound annual growth rates (CAGR) derived from the 2018-2024 flnancial history were Renton Municipal Airport | ATCT Siting Study Report | FINAL 51 applied to project future revenues, expenditures, and annual cash fiow through the year 2030. The planning-level Rough Order of Magnitude (ROM) project cost estimate identifled a total ATCT program cost of approximately $23.8 million, including environmental, design, construction, and related implementation activities. This cost information was incorporated into the forecast to illustrate the potential flnancial obligations associated with ATCT development and provide a broader understanding of the Airport's future funding needs. This evaluation provided a long-range view of the Airport's potential funding requirements and illustrated how external funding sources, such as federal and state grants, could signiflcantly infiuence the level of local investment needed to advance the ATCT project. To evaluate a range of potential funding outcomes, three potential funding scenarios were developed and analyzed, shown in Table 14. The Maximum Funding Scenario assumed continuation of historical grant funding levels supplemented by $200,000 in state funding and approximately $13.5 million in FAA funding. The Medium Funding Scenario assumed $200,000 in state funding and $5.0 million in FAA funding, while the Low Funding Scenario assumed $200,000 in state funding and $2.5 million in FAA funding. For each scenario, projected Airport revenues, expenditures, grants, and annual cash fiow positions were evaluated through a flve-year planning horizon to determine the relative flnancial burden associated with ATCT implementation. The scenario-based approach allows the Airport to evaluate project affordability under varying levels of state and federal participation while assessing the sensitivity of each funding scenario. This approach provides a comparative framework for identifying funding strategies that improve project feasibility while minimizing impacts on Airport flnances and future capital investment needs. Renton Municipal Airport | ATCT Siting Study Report | FINAL 52 Table 14: RNT Cash Flow Analysis Summary with Future Scenarios Item *2026 Budget *2027 Budget *2028 Budget *2029 Budget *2030 Budget Five-Year Project Summary Total Airport Revenues Summary Total Forecasted Revenues $4,994,754 $5,221,176 $5,457,862 $5,705,278 $5,963,910 $27,342,980 Total Forecasted Expenditures $6,115,873 $9,844,458 $4,040,362 $8,973,859 $15,106,373 $44,080,924 New ATCT Project Costs $2,384,709 $5,961,772 $0 $4,769,418 $10,731,190 $23,847,088 Environmental/ Initial Design $2,384,709 $0 $0 $0 $0 $2,384,709 Final Design/ Permitting $0 $5,961,772 $0 $0 $0 $5,961,772 Construction Admin $0 $0 $0 $4,769,418 $0 $4,769,418 Construction/ Equipment/ Demo Old Tower $0 $0 $0 $0 $10,731,190 $10,731,190 Scenario 1: Max Local Grants/ Contributions $450,000 $600,000 $0 $625,000 $6,540,000 $8,215,000 Federal Grants $350,000 $600,000 $0 $625,000 $11,460,000 $13,035,000 State Grants $0 $0 $0 $200,000 $0 $200,000 Scenario Total $800,000 $1,200,000 $0 $1,450,000 $18,000,000 $21,450,000 Capital Funding Gap ($1,584,709) ($4,761,772) $0 ($3,319,418) $7,268,810 ($2,397,088) ATCT Funding Coverage 34% 20% NA 30% 168% 90% Scenario 2: Medium Local Grants/ Contributions $450,000 $600,000 $0 $625,000 $6,540,000 $8,215,000 Federal Grants $350,000 $1,250,000 $0 $1,000,000 $2,250,000 $4,850,000 State Grants $0 $0 $0 $200,000 $0 $200,000 Scenario Total $800,000 $1,850,000 $0 $1,825,000 $8,790,000 $13,265,000 Capital Funding Gap ($1,584,709) ($4,111,772) $0 ($2,944,418) ($1,941,190) ($10,582,088) ATCT Funding Coverage 34% 31% NA 38% 82% 56% Scenario 3: Low Local Grants/ Contributions $450,000 $600,000 $0 $625,000 $6,540,000 $8,215,000 Federal Grants $350,000 $625,000 $0 $500,000 $1,125,000 $2,600,000 State Grants $0 $0 $0 $200,000 $0 $200,000 Scenario Total $800,000 $1,225,000 $0 $1,325,000 $7,665,000 $11,015,000 Capital Funding Gap ($1,584,709) ($5,221,176) ($5,457,862) ($5,505,278) ($5,963,910) ($27,142,980) ATCT Funding Coverage 34% 21% NA 28% 71% 46% Renton Municipal Airport | ATCT Siting Study Report | FINAL 53 Note: *Indicates forecasted budget based on six-year compound annual growth rate; Totals may not sum due to rounding Source: City of Renton, Annual Financial Report 2018-2024; FAA AIP Grant Awards History, 2026; Kimley-Horn, 2026 Section 13: FAA SRM FAA representatives of the Western Service Area and Renton Municipal Airport participated in the sitting activities at RNT located in Renton, Washington on April 21 and 22, 2026. The team followed FAA Order 6480.4C, Siting Airport Traffic Control Towers. The purpose of the meeting was to determine optimum height, cab size and location of a replacement Airport Traffic Control Tower (ATCT). The agenda discussed was the Airport Layout Plan overview, assessments of the preferred sites, as well as the SRM panel assessment and flnally the recommended site (1C) was given. Air Traffic Recommended Site: The Air Traffic recommended site is Site 1C. Site 1C was selected over the other sites due to the following advantages: • Site 1C is the nearest site to the current tower. • Site 1C does not require the demolition of a new hangar that brings in revenue. • Site 1C has infrastructure in place. • The tower will be the appropriate height for the airport budget. • Site 1C provides good overall visibility. • The LOS at Site 1C is good and an improvement over the LOS from the current tower for east, south, and inbound views. Section 14: Summary Renton Municipal Airport completed an ATCT siting study to identify the location of a new ATCT at the airport. This process was initiated in the summer of 2025 and concluded in the summer of 2026. Four sites were evaluated during the siting process, with several subsites within each of the 4 site locations. The Airport and FAA selected Site 1C as the preferred site, with Sites 1A and 1D reserved as back-up sites. Site 1 C is located adjacent to and west of the existing control tower, within the existing parking lot that serves the facility. FAA representatives of the Western Service Area and Renton Municipal Airport participated in the sitting and SRM activities at the airport on April 21 and April 22, 2026. The team followed FAA Order 6480.4C, Siting Airport Traffic Control Towers for the siting activities. The purpose of this report is to document the site selection process used to determine the location for a new ATCT at the airport. This process included examining different sites and proposing an overall best option for RNT while providing clear alternatives with their Renton Municipal Airport | ATCT Siting Study Report | FINAL 54 opportunities and constraints. This process included following the FAA site selection requirements and airspace analysis as part of the background for each site evaluation. The report includes information on site access, utilities, ROW, environmental, geotechnical, land use and FAA requirements. The study also included the development of project and construction costs along with a flnancing plan with various funding scenarios. With the site selection completed and Site 1C selected, Renton Airport may move forward with the design and environmental review phases of the project. Renton Municipal Airport | ATCT Siting Study Report 55 Appendix Renton Municipal Airport | ATCT Siting Study Report 52 Appendix Renton Municipal Airport | ATCT Siting Study Report 53 Appendix A. Consultant Site Visit Meeting (Agenda/Trip report) Site Visit and Coordination Meeting December 11, 2025 Renton Airport New Air Traffic Control Tower Siting Study Introductions General Project Overview Airport Site Tour Woking Lunch/Site by Site Review Wrap Up/Next Steps Agenda Time Activity Lead Location Topic 10:00 am -10:30 am (30 min) Introductions/ General Project Overview David Williams and Will Adams Airport Office Conference Room Team Introduction; Project Overview/Status; Airport/City Input, Schedule Overview/Status 10:30 am -12:30 pm (2 hours) Airport Site Tour Will Adams Airport tour - Vehicles General Airport Tour, Individual Site Tour, Existing ATCT tour 12:30 pm -1:45 pm (1 hour and 15 min) Working Lunch/Site by Site Review Dave Byres, Pete Deeks (input by all) Airport Office Conference Room Site by site review of site, Questions/Coordination 1:45 pm -2:00 pm (15 min) Wrap Up/Next Steps David Williams (All contribute) Airport Office Conference Room Wrap of Activities, Review of Next Steps/Action Items Project Overview Overview City Input Schedule Overview Project Overview •Airport Goals •Airport Challenges •FAA Coordination / Reimbursable Agreement •Stakeholders •Other Airport Considerations Project Schedule Draft Product Final Product City Review FAA Review KH team onsite at Airport Submittal to Airport Activity SubActivity 20 27 3 10 17 24 1 8 15 22 29 5 12 19 26 2 9 16 23 2 9 16 23 30 6 13 20 27 4 11 18 25 1 8 15 22 29 6 13 20 27 3 10 17 24 31 Task 1 Project Management Finalize Scope/Budget/IFE Project Administration Project review meetings with Airport (12) Project Meetings with FAA ADO (3) Internal Team Coordination In-House QA/QC Task 2 Data Collection and Review Complete Data Collection Activities Field Survey Prepare Survey Basemap Prepare full project Basemap Conduct Field Visit Task 3 Evaluate Potential Tower Sites Attend 3 coordination Meetings with FAA Prepare Initial Siting Analysis Confirm candidate ATCT Options Conducte prelim Evaluation Prepare Prelim Airspace Submit electronic Copy to FAA Provide FAA with 3D model of Cab Task 4 Site Requirements Conduct Access Review Conduct Site Utility Review Conduct ROW Review Conduct Geotech Review Conduct Land Use Review Conduct ALP Review Prepare Site Memo Task 5 Environmental Overview Prepare Environmental Overview Task 6 Cost Estimate Prepare Cost Estimate Task 7 Financial Feasibility Prepare Financial Feasibility Memo Task 8 FAA Safety Risk Management Attend FAA SRM Task 9 FAA Grant Closeout Prepare Closeout Documents AugustJulyJuneMayJanuary October November December February AprilMarch Airport Site Tour General Airport Individual Sites Existing ATCT Lunch Site by Site Review Information Developed Questions Coordination •Site Location •Height •Access •Utilities •Environmental •Right of Way •Other Site 1 –Adjacent to Existing ATCT Site 1 –Adjacent to Existing ATCT Site 1 Part 77 Surfaces 40’ AMSL 50’ AMSL 60’ AMSL 70’ AMSL 80’ AMSL •Assumed ATCT height: 98’ AMSL •RWY 16 RNAV GPS Y •No impacts •RWY 16 RNAV GPS Z •No impacts •RWY 34 RNAV GPS •No impacts Site 1 – Preliminary TERPS Analysis •Site Location •Height •Access •Utilities •Environmental •Right of Way •Other Site 2 – Existing Maintenance Facility Site 2 – Existing Maintenance Facility Site 2 Part 77 Surfaces 40’ AMSL 50’ AMSL 60’ AMSL 70’ AMSL 80’ AMSL 90’ AMSL 100’ AMSL •Assumed ATCT height: 116’ AMSL •RWY 16 RNAV GPS Y •No impacts •RWY 16 RNAV GPS Z •No impacts •RWY 34 RNAV GPS •No impacts Site 2 – Preliminary TERPS Analysis •Site Location •Height •Access •Utilities •Environmental •Right of Way •Other Site 3 – Northwest Corner of Airport Site 3 – Northwest Corner of Airport Site 3 Part 77 Surfaces 40’ AMSL 50’ AMSL 60’ AMSL 70’ AMSL 80’ AMSL 90’ AMSL 30’ AMSL •Assumed ATCT height: 117’ AMSL •RWY 16 RNAV GPS Y •No impacts •RWY 16 RNAV GPS Z •No impacts •RWY 34 RNAV GPS •No impacts Site 3 – Preliminary TERPS Analysis Site 4 – West Side of Rainer Avenue •Site Location •Height •Access •Utilities •Environmental •Right of Way •Other Site 4 – West Side of Rainer Avenue Site 4 Part 77 Surfaces 40’ AMSL 50’ AMSL 60’ AMSL 70’ AMSL 80’ AMSL 90’ AMSL 100’ AMSL 110’ AMSL 120’ AMSL 130’ AMSL 140’ AMSL •Assumed ATCT height: 137’ AMSL •RWY 16 RNAV GPS Y •No impacts •RWY 16 RNAV GPS Z •No impacts •RWY 34 RNAV GPS •No impacts Site 4 – Preliminary TERPS Analysis Environmental Overview Wrap Up/Next Steps Parking Lot Items Action Items Action Items Item #Action Responsible Party 1 2 3 4 5 6 7 8 Initial ATCT Site Assessment Renton Municipal Airport Pa ge 1 AJT Engineering, Inc. Site 1 51 Ft Cab Floor Advantages Disadvantages Discussion Immediate vicinity of the existing ATCT Limited construction laydown Requires study- build behind existing tower or demo existing tower Available infrastructure Interferes with current operations Existing FAA equipment in tower shaft Same ATC procedures Limited Line of Sight with Seaplane approaches Can extend FAA equipment to temporary tower Cutover simplified Possible temporary tower required Defines Airport center Infrastructure available. Site 2 136 Ft Cab Floor Advantages Disadvantages Discussion Site is on currently abandoned operations offices. Area depressed due to seismic liquefaction or deteriorating organic materials. Prevalent through whole site. Fiber is run to site. Move tower to the east to improve ATCT LOS (2A) Infrastructure available. Demolition of existing settling buildings required. Site 2A 106 Ft Cab Floor Advantages Disadvantages Discussion Site is on currently abandoned operations offices site. Area depressed due to seismic liquefaction or deteriorating organic materials. Prevalent through whole site. Fiber is run to site. Move tower to the east to improve ATCT LOS Infrastructure available. Moved site closer to taxiway to reduce height Initial ATCT Site Assessment Renton Municipal Airport Pa ge 2 AJT Engineering, Inc. Site 2B 87 Ft Cab Floor Advantages Disadvantages Discussion Site is on currently abandoned operations offices site. Area depressed due to seismic liquefaction or deteriorating organic materials. Prevalent through whole site. Fiber is run to site. Move tower to the east to improve ATCT LOS Infrastructure available. Moved site closer to taxiway to reduce height Site 3 93 Ft. Cab Floor Advantages Disadvantages Discussion Located on the lake side of the airport. Tower is somewhat isolated on the north side of the airport Part of the site is elevated but poses a Line of Sight issue with existing hangars Good Line of Sight with Lake approach patterns Best location in area is on the BRL Adequate space for parking Site 3A 43 Ft. Cab Floor Advantages Disadvantages Discussion Located on the lake side of the airport. Tower is somewhat isolated Part of the site is elevated but poses a Line of Sight issue with existing hangars Good Line of Sight with Lake approach patterns Best location in area is on the BRL Adequate space for parking Moved site closer to taxiway to reduce height Initial ATCT Site Assessment Renton Municipal Airport Pa ge 3 AJT Engineering, Inc. Site 4 126 Ft. Cab Floor Advantages Disadvantages Discussion Higher elevation but hangars shadow taxiway Property ownership pending Will need complete fencing Other Sites The eastern sites provided good Line of Sight to the western side of the airport. All sites considered on the east were under water due to local historic heavy flooding. Leased areas and land use also posed limitations. General Discussion All alternatives have good line of sight on movement areas All sites are east facing and are on the airside of the fence, except Site 4 Controllers did not have issues with night light glare when inquired Note: The existing tower is equipped with all FAA communications and weather equipment. A replacement FCT will require that the Airport provide all equipment in accordance with the FAA Minimum Equipment List along with maintaining this equipment. The FAA will relocate the STARS radar, FDIO and other equipment along with the FAA communications circuits through a Reimbursable Agreement. These costs need to be captured during the siting and concept design phase. The Airport will be required to purchase all FAA Minimum Equipment List systems. Initial ATCT Site Assessment Renton Municipal Airport Page 4 AJT Engineering, Inc. SITE 1 51 Ft Cab Floor SITE 2 136 Ft Cab Floor Initial ATCT Site Assessment Renton Municipal Airport Page 5 AJT Engineering, Inc. SITE 2A 106 Ft Cab Floor SITE 2B 87 Ft Cab Floor Initial ATCT Site Assessment Renton Municipal Airport Page 6 AJT Engineering, Inc. SITE 3 93 Ft Cab Floor SITE 3A 43 Ft Cab Floor Initial ATCT Site Assessment Renton Municipal Airport Page 7 AJT Engineering, Inc. SITE 4 126 Ft Cab Floor Renton Municipal Airport | ATCT Siting Study Report 54 Appendix B. Site Access Plan Sheets GA T E 1A Cessna T303Cessna T303 Cessna T303Cessna T303 Cessna T303Cessna T303 GATE PERIMETER R O A D LEASE BOUNDARY EXISTING AOA FENCE EXISTING ATCT INSTALL NEW AOA FENCE EXISTING TENANT HANGAR LEASE BOUNDARY STRIPE (5) NEW PARKING STALLS AND (1) ADA STALL STRIPE NEW AIRCRAFT TIE-DOWN PARKING OPTIONAL (12) PARKING STALL EXPANSION PROPOSED AIR TRAFFIC CONTROL TOWER INSTALL NEW GATE INSTALL NEW GATE INSTALL NEW AOA FENCE AND CONNECT TO EXISTING APPROXIMATE SITE ACREAGE: 0.36 AC R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 1 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 2 : 1 2 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 1 - A T C T S I T E 1 A . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH DEMO BUILDING EX-1SITE ALTERNATIVE - 1A 1.DESIGN AIRCRAFT: CESSNA T303 (ADG 1) 2.SITE ACCESS VIA W PERIMETER RD PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION OPTIONAL ASPHALT PAVING LANDSCAPING 1C PERIMETER R O A D EXISTING AOA FENCE LEASE BOUNDARY STRIPE (10) NEW PARKING STALLS AND (1) ADA STALL PROPOSED AIR TRAFFIC CONTROL TOWER LEASE BOUNDARY INSTALL NEW AOA FENCE AND CONNECT TO EXISTINGEXISTING ATCT APPROXIMATE SITE ACREAGE: 0.35 AC MOVE EXISTING AOA FENCE REMOVE EXISTING FENCE AND GATE NEW AOA FENCE AND GATE NEW FENCE R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : St a n e k , M i c h a e l S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 2 Ma y 0 8 , 2 0 2 6 1 1 : 2 2 : 1 3 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 1 - A T C T S I T E 1 C . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-2SITE ALTERNATIVE - 1C DEMO BUILDING PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION 1.DESIGN AIRCRAFT: CESSNA T303 (ADG 1) 2.SITE ACCESS VIA W PERIMETER RD SIDEWALK AND CURB CUT CONC S. S. PA V E D PA V E D MBX 1D LEASE BOUNDARY PERIMETER R O A D LEASE BOUNDARY EXISTING ATCT INSTALL NEW AOA FENCE LEASE BOUNDARY STRIPE (7) NEW PARKING STALLS AND (1) ADA STALL PROPOSED AIR TRAFFIC CONTROL TOWER EXISTING TENANT HANGAR INSTALL NEW AOA FENCE AND CONNECT TO EXISTING APPROXIMATE SITE ACREAGE: 0.28 AC DEMO EXISTING TENANT FENCE R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Ka l a , D o u g l a s S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 3 Ju l y 2 4 , 2 0 2 6 0 9 : 2 0 : 1 2 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 1 - A T C T S I T E 1 D . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-3SITE ALTERNATIVE - 1D DEMO BUILDING PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION LANDSCAPING 1.DESIGN AIRCRAFT: CESSNA T303 (ADG 1) 2.SITE ACCESS VIA W PERIMETER RD SIDEWALK AND CURB CUT PERIMET E R R O A D 2A RESTRIPE (6) PARKING STALLS AND (1) ADA STALL OPTIONAL (20) PARKING STALL AND (1) ADA STALL EXPANSION PROPOSED AIR TRAFFIC CONTROL TOWER LEASE BOUNDARY LEASE BOUNDARY EXISTING AOA GATE EXISTING AOA FENCE APPROXIMATE SITE ACREAGE: 0.40 AC R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 4 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 3 : 0 8 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 2 - A T C T S I T E 2 A . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-4SITE ALTERNATIVE - 2A DEMO BUILDING PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION OPTIONAL ASPHALT PAVING 1.SITE ACCESS VIA W PERIMETER RD 2B 10 . 0 ' 24 . 0 ' 22.0' 10 . 0 ' Ce s s n a T 3 0 3 Ce s s n a T 3 0 3 Ce s s n a T 3 0 3 Ce s s n a T 3 0 3 10 . 0 ' PERIMET E R R O A D LEASE BOUNDARY INSTALL NEW AOA FENCE LEASE BOUNDARY STRIPE (8) NEW PARKING STALLS AND (1) ADA STALL STRIPE NEW AIRCRAFT TIE-DOWN PARKING OPTIONAL (17) PARKING STALL AND (1) ADA STALL RESTRIPE PROPOSED AIR TRAFFIC CONTROL TOWER LEASE BOUNDARY EXISTING AOA GATE CONNECT TO EXISTING AOA FENCE DEMO EXISTING AOA FENCE APPROXIMATE SITE ACREAGE: 0.40 AC R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 5 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 3 : 2 2 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 2 - A T C T S I T E 2 B . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-5SITE ALTERNATIVE - 2B PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION OPTIONAL ASPHALT PAVING 1.DESIGN AIRCRAFT: CESSNA T303 (ADG 1) 2.SITE ACCESS VIA W PERIMETER RD 3A EXISTING AOA FENCE INSTALL NEW AOA FENCE LEASE BOUNDARY STRIPE (4) NEW PARKING STALLS AND (1) ADA STALL LEASE BOUNDARY PROPOSED AIR TRAFFIC CONTROL TOWER P E R I M E T E R R O A D APPROXIMATE SITE ACREAGE: 0.27 AC OFFSITE LANDSIDE PARKING EXPANSION R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 6 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 3 : 3 8 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 3 - A T C T S I T E 3 A . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-6SITE ALTERNATIVE - 3A PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION SIDEWALK AND CURB CUT 1.SITE ACCESS VIA W PERIMETER RD 3B GATE P E R I M E T E R R O A D LEASE BOUNDARY EXISTING AOA FENCE INSTALL NEW AOA FENCE LEASE BOUNDARY STRIPE (6) NEW PARKING STALLS AND (1) ADA STALL PROPOSED AIR TRAFFIC CONTROL TOWER INSTALL NEW GATE APPROXIMATE SITE ACREAGE: 0.30 AC R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 7 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 3 : 5 2 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 3 - A T C T S I T E 3 B . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-7SITE ALTERNATIVE - 3B PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION OPTIONAL ASPHALT PAVING 1.DESIGN AIRCRAFT: CESSNA T303 (ADG 1) 2.SITE ACCESS VIA W PERIMETER RD 4A G A T E RAINIER A V E INSTALL NEW FENCE STRIPE (9) NEW PARKING STALLS AND (1) ADA STALL OPTIONAL (24) PARKING STALL EXPANSION PROPOSED AIR TRAFFIC CONTROL TOWER PROPERTY BOUNDARY CITY OF RENTON RIGHT OF WAY INSTALL NEW GATE APPROXIMATE SITE ACREAGE: 0.40 AC R SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE:PROJECT NO:SCALE: CHECKED BY: DRAWN BY: DESIGNED BY: RENTON MUNICIPAL AIRPORT ATCT SITING STUDY Pl o t t e d B y : Va l e n z u e l a , Z a i r e S h e e t S e t : RN T _ T A X I W A Y A R E H A B L a y o u t : EX - 8 Fe b r u a r y 2 7 , 2 0 2 6 1 0 : 1 4 : 0 9 a m K: \ S E A _ P u b l i c S e c t o r \ 0 9 0 2 3 5 0 0 1 - R N T - A T C T S i t i n g S t u d y \ 0 8 C A D D \ P l a n S h e e t s \ C 4 - A T C T S I T E 4 A . d w g xx x - x x - x x x x LEGEND SHEET NOTES © 2025 KIMLEY-HORN AND ASSOCIATES, INC. WWW.KIMLEY-HORN.COM PHONE: 206-607-2600 1201 THIRD AVENUE, SUITE 2800, SEATTLE, WA 98101 DRAFT NORTH EX-8SITE ALTERNATIVE - 4A PROJECT ASPHALT PAVING PROPOSED TOWER LOCATION OPTIONAL ASPHALT PAVING 1.OFF-AIRPORT LOCATION. SITE ACCESS VIA RAINIER AVE. SIDEWALK AND CURB CUT Renton Municipal Airport | ATCT Siting Study Report 55 Appendix C. S Site Utility Memo and Plan Sheets TECHNICAL MEMORANDUM To: David Williams, P.E. Kimley-Horn From: Century West Engineering DATE: FEBRUARY 20, 2026 (JULY 24, 2026 UPDATE) Subject: Renton Municipal Airport ATCT Siting – Utilities Evaluation BACKGROUND Existing utility infrastructure was evaluated at eight refined Air Traffic Control Tower (ATCT) sites to support the site selection process. This assessment determined the capacity of each location to support a new facility based on electrical, communications (fiber optic), water, storm drainage, sanitary sewer, and natural gas services. The natural gas data available were incomplete and limited to the vicinities of Sites 2A/2B and 3A/3B. METHODS Existing utility data were compiled into a comprehensive basemap using municipal geographic information systems (GIS), engineering drawings, and airport records. While these data provide a necessary reference for the selection process, no underground utili ty surveys were performed during this phase. Focused utility locate surveys and formal mapping will be required during the design phase. Before the evaluation, the available data were reconciled by removing duplicate features and identifying infrastructure marked as abandoned in place. Following the basemap cleanup, each proposed ATCT location was assessed to identify direct conflicts with existing utilities and to determine the conceptual service extensions required for each site. These proposed extensions are preliminary and will require further refinement once a preferred site is selected and the design phase begins. Overview graphics for each site were produced and are included at the end of this document. Eight proposed ATCT sites were evaluated. These sites were organized into four distinct areas based on common locations. The areas and associated sites are as follows: • Area 1 – Includes Site 1A, Site 1C, and Site 1D • Area 2 – Includes Site 2A, and Site 2B • Area 3 – Includes Site 3A, and Site 3B • Area 4 – includes Site 4A AREA 1 (SITES 1A, 1C, AND 1D) Utilities at proposed ATCT sites 1A, 1C, and 1D are depicted in Figures 1, 2, and 3 respectively. Each site has good access to all documented utilities due to the density of existing development in the area. Although natural gas data for this area were limited, the presence of the existing ATCT and surrounding infrastructure suggests that natural gas service is likely available, potentially via the West Perimeter Road or Rainier Avenue rights-of-way (ROW). Further investigation is required to confirm the service availability at these locations. Development at Site 1A would result in direct conflicts with existing water and sanitary sewer lines that intersect the proposed tower footprint. If Site 1A is selected as the preferred location, these lines will require rerouting. Detailed results of the evaluations for Sites 1A, 1C, and 1D are summarized in Tables 1, 2, and 3 respectively. Table 1: Site 1A Utilities Summary Utility Condition Electrical Existing transformer connection available is 130’ to the southwest or nearest connection 40’ southwest to an electrical vault (to be confirmed in future phase) Communications Existing fiber optic junction box 50’ to the south Water Existing 12" main 25' west of site Existing service loop lines and fire suppression main require rerouting around proposed site Sanitary Sewer Existing 8" line runs under site to manhole 50' north Rerouting of downstream leg required Storm Sewer Site has existing storm drainage. Minor reconfiguration may be needed Natural Gas Unknown – There is likely service in the area. More information needed to confirm Utility Conflicts Existing water and sanitary sewer lines servicing neighboring facilities conflict with the proposed ATCT placement and require rerouting Table 2: Site 1C Utilities Summary Utility Condition Electric Existing transformer connection available is 90’ to the west or nearest connection 70’ to the north to an electrical vault (to be determined in future phase) Communications Existing underground fiber optic 70’ west of site or nearest connection at existing tower (to be determined in future phase) Water Existing 12” main 50' west of site or nearest connection 30’ east at the existing tower (to be determined in future phase) Sanitary Sewer Existing 8" line 25' west of site or 30’ east at the existing tower (to be determined in future phase) Storm Sewer Site has existing storm drainage. Minor reconfiguration may be needed to accommodate tower Natural Gas Unknown – There is likely service in the area. More information needed to confirm Utility Conflicts None Table 3: Site 1D Utilities Summary Utility Condition Electric Existing transformer connection available is 125’ to the northwest or nearest connection immediately east at 608 hangar (to be determined in future phase) Communications Existing underground fiber optic 60' west of site Water Existing 12” main 45' west of site or nearest connection immediately east at 608 hangar (to be determined in future phase) Sanitary Sewer Existing 8" line 20' west of site or nearest connection immediately east at 608 hangar (to be determined in future phase) Storm Sewer Site is over existing building to be removed. Expansion of adjacent storm drainage network likely necessary Natural Gas Unknown - Insufficient Data Utility Conflicts The proposed site is currently occupied by an existing hangar. The hangar and any associated service lines would need to be removed AREA 2 (SITES 2A AND 2B) Utilities at proposed ATCT sites 2A and 2B are depicted in Figure 4 and 5 respectively. Generally, both sites have good access to documented utilities due to their proximity to existing development in the area. Site 2A is positioned on lot currently occupied by an existing Quonset structure. As a result the site already has ready access to utilities. Site 2B is located further to the east on the existing apron, and adjacent to an above ground fuel storage tank to the south. While there is nearby access to water and sanitary sewer services, this location would require extending service extensions from West Perimeter Road to access electrical, communications, and natural gas. Ground settlement may be an issue at Site 2 and will need to be considered with the construction of new utilities serving the proposed ATCT. Verifying the integrity of existing utilities before tying into and extending should also be done. Detailed results of the evaluations for Sites 2A and 2B are summarized in Tables 4 and 5 respectively. Table 4: Site 2A Utilities Summary Utility Condition Electric Existing transformer connection available is 25’ to the northwest Communications Existing fiber optic junction box available 30’ to the west Water Connection to existing 12” main available 75’ to the south Sanitary Sewer Existing manhole connection available 50’ to the south. Storm Sewer Site has existing storm drainage. Minor reconfiguration may be needed Natural Gas Reuse or minor extension of existing service line to current Quonset structure possible Existing Conflicts The proposed site is currently occupied by an existing building. The building and any associated service lines would need to be removed Table 5: Site 2B Utilities Summary Utility Condition Electric Existing transformer connection available 175' west of site Communications Existing underground fiber optic junction box available 175’' west of site Water Existing 12" main available 25' west of site Sanitary Sewer Existing service available 50 west of site Storm Sewer Site has existing storm drainage. Minor reconfiguration may be needed Natural Gas Existing service available 175' west of site Existing Conflicts None AREA 3 (SITES 3A AND 3B) Utilities at proposed ATCT sites 3A and 3B are depicted in Figures 6 and 7, respectively. These proposed sites are located at the far north end of the airport, which is less developed than the previously discussed sites. As such, the density of available utilities is also lower and primarily concentrated near the West Perimeter ROW. Both Sites 3A and 3B would likely require service extensions to the West Perimeter Road ROW to access electrical, water, communications, natural gas, and sanitary sewer services. The Site 3A footprint conflicts with the east-west leg of the 12-inch water main. The Site 3B footprint conflicts with two existing electrical service lines and a storm drainage line. These conflicts would need to be resolved by rerouting the existing lines if either Site 3A or 3B is selected as the preferred site. Detailed results of the evaluations for Sites 3A and 3B are summarized in Tables 6 and 7 respectively. Table 6: Site 3A Utilities Summary Utility Condition Electric Existing underground service is available 90' west of site Communications Existing fiberoptic available on west edge of site. Minor reconfiguration of the fiber optic line or adjustment of tower location may be needed to address conflict with tower Water Existing 12" main available on north edge of site. Minor reconfiguration of the main or adjustment of tower location may be needed to address conflict Sanitary Sewer Existing service available 120' west of site Storm Sewer Site has no existing underground storm drainage. Existing main trunk runs 25' west of site Natural Gas Existing service is available 75' west of site Existing Conflicts Existing water main and fiber optic line conflict with the proposed ATCT placement and will require rerouting Table 7: Site 3B Utilities Summary Utility Condition Electric Existing underground service available 110' west of site Communications Existing fiberoptic available 45' west of site Water Existing 12" main available 80' west of site Sanitary Sewer Existing main available 80' west of site Storm Sewer Site has existing storm drainage. Approximately 80' of storm drainage pipe would need to be rerouted to accommodate tower. Other minor drainage improvements may be necessary Natural Gas Existing service available 110' west of site Existing Conflicts Existing storm line and electrical line conflict with the proposed ATCT placement and will require rerouting AREA 4 (SITE 4A) Utilities at the site proposed as Site 4A are depicted in Figure 8. This site is located immediately west of Area 1 across Rainier Avenue on a mostly undeveloped lot. Based on the utility information available, this site has ready access to water and sanitary sewer services. Based on a review of available aerial imagery, electrical service may potentially be accessed via a transformer connection on the west edge of Rainier Avenue ROW, northwest of the site. This potential transformer is not included in the utility data provided. Field verification is recommended. Communications service is available on the east side of Rainier Avenue. Similarly to Sites 1A, 1C, and 1D natural gas information in this area is limited and the presence of service cannot be definitively determined. However, based on adjacent development to the south and the west, it is feasible that natural gas service is available nearby. Further investigation is needed to determine if that is the case. As the proposed site is largely undeveloped, there is no existing storm drainage infrastructure in the immediate area. Storm drainage service could be extended from the Rainier Avenue ROW. Detailed results of the evaluations for Site 4A are summarized in Table 8. Table 8: Site 4A Utilities Summary Utility Condition Electric Possible transformer connection available 80’ northeast of site per aerial imagery. Field verification of service is recommended. The nearest confirmed service is a transformer 210' east of the site on the east side of Rainier Ave. Communications Closest known service is 220' east of the site. Service extension requires crossing Rainier Ave. Additional service may be available west of Rainier. More information needed to confirm. Water Existing 10" main located 25' east of site Sanitary Sewer Existing main (unknown size) located 95' east of site Storm Sewer No storm drainage in the immediate vicinity. Nearest existing drainage line 90' east of site Natural Gas Unknown - Insufficient Data Existing Conflicts None LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT Y:\Marketing\Brand Standards\Logos\CWE logo_color.jpg W E S T P E R I M E T E R R D WATER ELECTRICAL SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED R A I N I E R A V E Feet 0 20 40 Figure 1 - Site 1A Utilities NEW ELECTRICAL VAULT LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT Y:\Marketing\Brand Standards\Logos\CWE logo_color.jpg WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 W E S T P E R I M E T E R R D R A I N I E R A V E ELECTRICAL Figure 2 - Site 1C Utilities NEW ELECTRICAL VAULT LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 W E S T P E R I M E T E R R D R A I N I E R A V E ELECTRICAL Figure 3 - Site 1D Utilities LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 R A I N I E R A V E W E S T P E R I M E T E R R D ELECTRICAL Figure 4 - Site 2A Utilities LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 W E S T P E R I M E T E R R D ELECTRICAL Figure 5 - Site 2B Utilities LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 W E S T P E R I M E T E R R D ELECTRICAL Figure 6 - Site 3A Utilities LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 WE S T P E R I M E T E R R D ELECTRICAL Figure 7 - Site 3B Utilities LEGEND RNT ATCT LOCATION EXHIBIT Renton Municipal Airport KRNT WATER SANITARY FIBER OPTIC NATURAL GAS POTENTIAL CONFLICT WATER ELECTRICAL STORM DRAIN SANITARY FIBER OPTIC NATURAL GAS EXISTINGPROPOSED Feet 0 20 40 W E S T P E R I M E T E R R D R A I N I E R A V E ELECTRICAL Figure 8 - Site 4A Utilities Renton Municipal Airport | ATCT Siting Study Report 56 Appendix D. Geotechnical Summary Memo 21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com February 5, 2026 HWA Project No. 2025-146-21 Kimley-Horn and Associates, Inc. 1201 Third Avenue, Suite 2800 Seattle, Washington 98101 Attention: David Williams, P.E. Subject: GEOTECHNICAL REPORT Air Traffic Control Tower Siting Study Project Renton Municipal Airport Renton, Washington Mr. Williams, At your request, HWA GeoSciences Inc. (HWA) completed a site reconnaissance and review of available geotechnical information at four proposed locations for the Air Traffic Control Tower (ATCT) Siting Study project at Renton Municipal Airport in Renton, Washington. Figure 1, Vicinity Map, shows the general location of the airport. The four proposed sites are located in the western portion of the airport as follows: • Site 1: Just north of the existing ATCT • Site 2: Current site of Renton Airport Maintenance Shop (Quonset Building) • Site 3: The northwestern corner of the airport near Lake Washington • Site 4: West side of Rainier Avenue N, north of the existing ATCT The locations of the proposed ATCT sites are shown on Figures 2A through 2C, Site and Exploration Plans. The purpose of our work was to evaluate available surface and subsurface information near the proposed sites to summarize the available data and to provide a summary of significant considerations. At the request of the client, no explorations were performed for this study. SURFICIAL GEOLOGY Surficial Geology for all sites is mapped at the 1:24,000 scale in Geologic map of the Renton Quadrangle, King County, Washington (Mullineaux, McKillop, & Holmes, 1965). Sites 1, 2, and 3, all within the current boundaries of the Renton Municipal Airport, are mapped as Artificial fill. Site 4, on the west side of Rainier Avenue N, has four units mapped within a span of approximately 200 feet at this location. These units are, in order of assumed deposition from youngest to oldest, Artificial fill, Kame Terrace deposits, Ground Moraine deposits, and February 5, 2026 HWA Project No. 2025-146-21 Air Traffic Control Tower Siting Study Project 2 HWA GEOSCIENCES INC. Undifferentiated Quaternary deposits. The artificial fill may have been sourced from the site originally or imported from nearby quarries. This material was brought in to either replace unsuitable soils or to place on top of existing soils to raise the elevation. Kame Terrace deposits are described as sand and pebble-to-cobble gravel in scattered terraces whose surfaces locally are deformed by extensive collapse. Ground Moraine deposits are described as Lodgment till generally compact, coherent, unsorted mixture of sand, silt, slay and gravel, commonly termed hardpan. Ablation till similar, but much less compact and coherent. Undifferentiated Quaternary deposits are described as till sheets, glaciofluvial and gravel, glaciolacustrine clay and sand, and nonglacial sand, clay, and thin peat. Notably, approximately 1,000 feet north and along the same hillside as proposed Site 4, there are mapped historic (less than 150 years old) landslides within the Ground Moraine deposits according to Landslide Inventory of Western King County (Mickelson, Jacobacci, Contreras, Gallin, & Slaughter, 2019). While conditions can vary over a short distance, landslide susceptibility should be kept in mind and any hazards studied extensively prior to construction. AIRPORT HISTORY Historically, Lake Washington drained to the south through the Black River. Before the year 1916, Lake Washington extended as far south as the current Taxiway A5 location at Renton Municipal Airport (see Figure 3, Historic Lake Washington Shoreline). From there, Lake Washington flowed into the Black River and met the Cedar River at the southern end of Taxiway A. In the year 1916, a canal had been completed between Lake Washington and Portage Bay (Lake Union) resulting in a lowering of Lake Washington water levels by about 9 feet to match that of Lake Union. Both lake levels would become controlled by the Hiram M. Chittenden Locks, also known as the Ballard Locks. The Cedar River was rerouted to flow into Lake Washington during the same period of land modification, to prevent flooding in the City of Renton. This activity severed Lake Washington’s outflow to the Black River, as well as the Cedar River’s flow into the Black River. As the Black River dried, fill soils were placed in the historic river channel, nearby wetlands, and the local flood plain to create usable land for development. According to historic aerial imagery, this area was used for farming prior to upgrading the airport in 1941 during World War 2. PREVIOUS EXPLORATIONS A review of available geotechnical explorations in the vicinity of the four sites resulted in the logs of previously completed explorations near Sites 1, 2, and 3. No previous explorations were identified near Site 4. The approximate locations of these explorations in relation to each site are shown in Figures 2A through 2C, Site and Exploration Plans and described below. Site 1 In 2016, CivilTech Engineering, Inc. performed a geotechnical investigation as part of the Geotechnical Exploration and Services for RMA Office Renovation, Renton, Washington project February 5, 2026 HWA Project No. 2025-146-21 Air Traffic Control Tower Siting Study Project 3 HWA GEOSCIENCES INC. (CivilTech Engineering, 2016). The project included remodeling and expanding the administrative offices on the first floor of the existing ATCT along with a seismic retrofit of the ATCT. Their report included the logs of two borings, Boring #1 and B-1. Boring #1 was drilled in 1960, or earlier, to a depth of 52 feet by an unknown driller, as part of the original ATCT construction. This boring encountered about 15 feet of loose, sandy fill containing sawdust over approximately 7 feet of loose to medium dense sand with small gravel over 10 feet of dense to very dense sandy loam with organics and gravel over 6 feet of medium dense sand over 14 feet of very dense sand with occasional gravel. Groundwater was encountered at a depth of about 3 feet. CivilTech Engineering logged the drilling of boring B-1, drilled by Holocene Drilling in 2016, to a depth of about 75.5 feet. Boring B-1 encountered very loose silt and sand and very soft clayey silt to a depth of about 17 feet over loose to medium dense sand and gravel and soft to stiff slit and clay to a depth of about 60 feet over very stiff silt and very dense sand and gravel to the termination depth of 75.5 feet. The groundwater level was not measured due to the drilling method (mud rotary). In 2023, HWA logged the drilling of 25 borings, drilled using sonic methods, to depths of about 11.5 feet each, spread across Taxiway A as a part of the Taxiway A Rehabilitation/Reconstruction & Associated Improvements – Phase 1 Predesign project (HWA, 2024). The nearest explorations to Site 1, within approximately 300 feet, consisted of borings B- 7, B-23, B-22 and B-21. Each boring was drilled through the Hot Mix Asphalt (HMA) pavement, which was about 3 to 5.5 inches thick. Dense granular fill was encountered below the HMA to depths of about 2 to 5 feet overlying very loose to very soft alluvium, consisting of silty to sandy silt with wood and organics. Groundwater was encountered in each boring at depths of 4.5 to 9.5 feet. Each exploration was terminated at a depth of 11.5 feet in the very loose/very soft alluvium. Site 2 In 2022, HWA logged the drilling of 3 borings, designated BH-1 through BH-3, drilled using hollow stem auger methods, to depths ranging from 22.5 to 41.5 feet near the current site of Renton Airport Maintenance Shop (Quonset Building) as a part of the Rainier Quonset Parking Area Settlement project (HWA, 2022). The explorations were performed to assess the causes of significant magnitudes of ongoing settlement (6 to 9 inches) within the parking area adjacent to the maintenance shop structure, which is pile supported. Borings BH-1 and BH-2 each encountered about 4 inches of HMA pavement over loose, granular fill to a depth of about 2 feet overlying very loose wood chip fill to a depth of about 10 to 13 feet. Below the wood chip fill, the borings encountered very soft, organic silt with low to high plasticity. The organic silt extended to the termination depth of each boring at 22.5 feet in BH-1 and 41.5 feet in BH-2. Boring BH-3 encountered about 4 inches of HMA pavement over loose, granular fill to a depth of 9 feet over very loose, wood chip fill to a depth of 15 feet. A layer of loose silty sand was February 5, 2026 HWA Project No. 2025-146-21 Air Traffic Control Tower Siting Study Project 4 HWA GEOSCIENCES INC. encountered from about 15 to 18 feet over very loose organic silt to the termination depth of 22.5 feet. Groundwater was encountered in each boring at a depth of 7.5 to 8.5 feet. In 2019, GeoDesign Inc. logged the drilling of 3 borings, designated B-1 through B-3, to depths of between 31.5 feet and 101.5 feet, and advanced a Cone Penetration Test (CPT) probe to a depth of 69.1 feet, as part of the Rainier Flight Service – Proposed Hangar project (GeoDesign Inc., 2019). The borings were drilled using mud-rotary techniques. The explorations were located north of the Rainier Flight Service building, about 300 to 400 feet north of the Site 2 location. These explorations encountered very loose to very soft alluvium, consisting of silty sand and sandy silt to depths of about 50 to 60 feet. Medium dense to dense and stiff to very stiff alluvium, consisting of silty sand and sandy silt, was encountered to depths of about 60 to 70 feet, overlying dense to very dense glacial till. A vibrating wire piezometer was installed in boring B-1, which recorded groundwater depths of about 2 to 3 feet in September and October 2019. The CPT, designated CPT-1, encountered very loose soils to a depth of about 50 feet and met refusal at a depth of about 70 feet, confirming the results of the borings. Site 3 Near Site 3, one boring, designated B-15, was conducted as part of the Taxiway A Reconstruction/Rehabilitation & Associated Improvements – Phase 1 Predesign project (HWA, 2024) to a depth of 11.5 feet. This boring encountered a pavement section consisting of 4 inches of HMA over 5 inches of crushed aggregate base. Medium dense to loose, granular fill was encountered below the pavement section to a depth of 5 feet. Very loose alluvium, consisting of silty sand with gravel, was encountered to the bottom of the exploration, at a depth of 11.5 feet. Groundwater was encountered at a depth of 4.5 feet. Site 4 As indicated previously, no explorations near Site 4 were found in HWA’s database or publicly available resources. CONCLUSIONS AND RECOMMENDATIONS At the locations of Sites 3, and 4, the available explorations did not extend deep enough to reach competent soils for foundation support. Additional explorations will be required at these sites to provide recommendations for foundation design. At Site 1, the explorations associated with the CivilTech Engineering memo encountered very loose to medium dense sand and silt and soft to stiff clayey silt to a depth of about 60 feet over very dense sand and silt, suitable for foundation support, to the termination depth of 75.5 feet. The soils in the upper 60 feet are considered liquefiable. At Site 2, the explorations performed by HWA, closest to the proposed site, encountered very loose wood chip fill to depths of 10 to 15 feet over very soft organic silt to a depth of at least 41.5 feet. The borings performed by GeoDesign, located north of the Rainier Flight Service building, encountered very loose/very soft alluvial deposits to a depth of about 50 to 60 feet, February 5, 2026 HWA Project No. 2025-146-21 Air Traffic Control Tower Siting Study Project 5 HWA GEOSCIENCES INC. which became medium dense to dense to depths of about 60 to 70 feet where very dense glacial till, suitable for foundation support, was encountered. The soils in the upper 50 to 60 feet are considered liquefiable. Based on the results of the deeper borings near Sites 1 and 2, the Seismic Site Class for these sites is Class E. Given that Site 3 geologic mapping is similar to Sites 1 and 2, we anticipate that this site is likely also classified as Seismic Site Class E, though additional explorations would be required to verify this. Due to the lack of explorations near Site 4, the Seismic Site Class is not known, and additional explorations would be required to determine this. In our opinion, pile foundations will be required for Sites 1, 2, and 3, and likely required for Site 4. The piles at Sites 1 and 2 will likely need to extend below a depth of 60 feet to bear in dense, competent soils. Pile foundations for Site 3 will likely need to extend to at least this depth, and potentially deeper. Additionally, Site 4 may have risks associated with slope stability that would need to be considered. Further investigations, consisting of drilled borings, will need to be performed at whichever site is selected. CONDITIONS & LIMITATIONS We have prepared this report for Kimley-Horn and Associates, Inc. for use in design of this project. The conclusions and interpretations presented in this report should not be construed as our warranty of the subsurface conditions. Experience has shown that soil and groundwater conditions can vary significantly over small distances. As indicated previously, no explorations were performed for this study. Within the limitations of scope, schedule and budget, HWA attempted to execute these services in accordance with generally accepted professional principles and practices in the fields of geotechnical engineering in the area at the time the report was prepared. No warranty, express or implied, is made. ◆ © 2025 Microsoft Corporation © 2025 TomTom AIR TRAFFIC CONTROL TOWER SITING STUDY PROJECT RENTON MUNICIPAL AIRPORT RENTON, WASHINGTON 0 250 500 750 1000 SCALE: 1" = 500'RM/BKH CF VICINITY MAP 2025-146-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2025-146-21 RENTON AIRPORT ATCT SITING\2025-146-21 RENTON AIRPORT ATCT SITING.DWG <1> Plotted: 12/27/2025 1:28 PM 1 DBE/MWBE © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS SITE AND EXPLORATION PLAN 2025-146-21 AIR TRAFFIC CONTROL TOWER SITING STUDY PROJECT RENTON MUNICIPAL AIRPORT RENTON, WASHINGTONBASE MAP PROVIDED BY: BING 0 75 150 225 300 SCALE: 1" = 150' ATCT SITES 1 & 4 Scale: 1" = 150'-0"EXPLORATION LEGEND RM/BKH CF FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2025-146-21 RENTON AIRPORT ATCT SITING\2025-146-21 RENTON AIRPORT ATCT SITING.DWG <2A> Plotted: 2/17/2026 6:40 PM 2A DBE/MWBE AERIAL IMAGERY REFERENCE IS APPROXIMATE AND MAY APPEAR OFFSET FROM SURVEYED DATA AND BASEMAPS. PREVIOUS EXPLORATIONS ARE SHOWN AT APPROXIMATE LOCATIONS ESTIMATED FROM AVAILABLE REFERENCES. RENTON MUNICIPAL AIRPORT W PERIMETER RD RAINIER AVE N B-7 B-21 B-23 B-22 B-7 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (HWA, 2023) SITE 1 PROPOSED SITE LOCATION SITE 4 SITE 1 EXISTING ATCT SITE B-1 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (CIVIL TECH, 2016) #1 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (UNKNOWN DRILLER, 1960) #1 B-1 BORING #1 B-7 SITE 1 B-1 #1BORING #1 (CIVILTECH ENGINEERING, 2016) (CIVILTECH ENGINEERING, 2016) 4 © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS AIR TRAFFIC CONTROL TOWER SITING STUDY PROJECT RENTON MUNICIPAL AIRPORT RENTON, WASHINGTONBASE MAP PROVIDED BY: BING 0 75 150 225 300 SCALE: 1" = 150' ATCT SITE 2 Scale: 1" = 150'-0"EXPLORATION LEGEND B-1 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (GEODESIGN, 2019) RM/BKH CF BH-3BH-2 BH-1 RENTON MUNICIPAL AIRPORT W PERIMETER RD W PERIMETER RD SITE 2 SITE AND EXPLORATION PLAN 2025-146-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2025-146-21 RENTON AIRPORT ATCT SITING\2025-146-21 RENTON AIRPORT ATCT SITING.DWG <2B> Plotted: 1/5/2026 4:44 PM 2B DBE/MWBE AERIAL IMAGERY REFERENCE IS APPROXIMATE AND MAY APPEAR OFFSET FROM SURVEYED DATA AND BASEMAPS. PREVIOUS EXPLORATIONS ARE SHOWN AT APPROXIMATE LOCATIONS ESTIMATED FROM AVAILABLE REFERENCES. BH-1 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (HWA, 2022) CPT-1 CPT DESIGNATION AND APPROXIMATE LOCATION (GEODESIGN, 2019) SITE 2 PROPOSED SITE LOCATION RAINIER AVE N S 1 1 7 T H S T B-3 B-2 B-1 CPT-1 © 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS AIR TRAFFIC CONTROL TOWER SITING STUDY PROJECT RENTON MUNICIPAL AIRPORT RENTON, WASHINGTONBASE MAP PROVIDED BY: BING 0 75 150 225 300 SCALE: 1" = 150' ATCT SITE 3 Scale: 1" = 150'-0"EXPLORATION LEGEND RM/BKH CF CEDAR RIV E R W A T E R W A Y W PERIMETER RD B-15 SITE 3 SITE AND EXPLORATION PLAN 2025-146-21 FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: C:\USERS\CFRY\DESKTOP\2025-146-21 RENTON AIRPORT ATCT SITING\2025-146-21 RENTON AIRPORT ATCT SITING.DWG <2C> Plotted: 12/27/2025 1:30 PM 2C DBE/MWBE AERIAL IMAGERY REFERENCE IS APPROXIMATE AND MAY APPEAR OFFSET FROM SURVEYED DATA AND BASEMAPS. PREVIOUS EXPLORATIONS ARE SHOWN AT APPROXIMATE LOCATIONS ESTIMATED FROM AVAILABLE REFERENCES. BH-15 BOREHOLE DESIGNATION AND APPROXIMATE LOCATION (HWA, 2023) SITE 3 PROPOSED SITE LOCATION W P E R I M E T E R R D RENTON MUNICIPAL AIRPORT S 1 1 4 T H S T 4 HISTORIC LAKE WASHINGTON SHORELINE 2025-146-21 AIR TRAFFIC CONTROL TOWER SITING STUDY PROJECT RENTON MUNICIPAL AIRPORT RENTON, WASHINGTON RM/BKH CF 3FIGURE NO.: PROJECT NO.: DRAWN BY: CHECK BY: DBE/MWBE C:\USERS\CFRY\DESKTOP\2025-146-21 RENTON AIRPORT ATCT SITING\2025-146-21 RENTON AIRPORT ATCT SITING.DWG <3> Plotted: 12/27/2025 1:30 PM 3 Appendix A Previous Explorations Site 1: CivilTech Engineering, Inc. Memo Boring #1 and B-1 HWA Report 2023-027 B-7, B-21 through B-23 Site 1: CivilTech Engineering, Inc. Memo Borings Boring #1 and B-1 HWA Report 2023-027-21 Borings B-7 and B-21 through B-23CivilTech Engineering, 2016, Borings Boring #1 and B-1 HWA, 2024, Borings B-7 and B-21 through B-23 GSS-1 S-2 5 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL, moist. (CRUSHED BASE) 5 inches Portland Cement Concrete. (PCC) Dense, grayish-brown, fine to coarse, rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Loose, grayish-brown, very silty SAND, moist. (FILL) Very loose, dark gray, silty, medium SAND with wood fragments, wet. (ALLUVIUM) Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 1-1-0 1-1-0 GP SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B- 7 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-8 DE P T H (f e e t ) 0 5 10 15 20 15 10 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 21.4 feet GS %F AL S-1 S-2 S-3 S-4 4 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, dark yellowish-brown, fine to coarse, rounded, well graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Loose, dark gray, silty SAND with gravel, moist. Coarse, rounded gravel. (FILL) Very loose, brown and gray, silty SAND, moist. (ALLUVIUM) Loose, dark gray, poorly graded SAND with silt, moist. Very soft, tan and very dark gray, organic SILT with sand, moist. Becomes dark gray. Very loose, dark gray, fine to coarse, poorly graded SAND with gravel, wet. Very soft, dark gray, sandy SILT, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 9.5 feet below ground surface. 1-0-1 1-0-1 GW SM SM SP SM OH SP ML BORING-DSM 2023-027.GPJ 12/22/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-21 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-22 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller >>111 SURFACE ELEVATION: 25.6 feet GS GS GS S-1 S-2 S-3 S-4 5.5 inches Hot Mix Asphalt. (HMA) 4.5 inches Crushed Base. Dense, grayish-brown, sandy, fine to coarse, crushed GRAVEL with silt, moist. (CRUSHED BASE) Dense, dark yellowish-brown, fine to coarse, sub-rounded, poorly graded GRAVEL with sand, moist. (GRAVEL BORROW FILL) Very soft, very dark brown and gray, laminated, sandy SILT, moist. (ALLUVIUM) Silt content decreases, lenses of brown organics. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 5 feet below ground surface. 0-0-0 0-1-0 GP ML BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-22 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-23 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.7 feet GS GS S-1 S-2 S-3 S-4 3 inches Hot Mix Asphalt. (HMA) Dense, brown, silty, fine to coarse, rounded GRAVEL with sand moist. (FILL) Loose, blue-gray, silty SAND with gravel, moist. Very soft, very dark gray, SILT with sand, moist. (ALLUVIUM) Becomes wet. Very loose, very dark gray, silty, fine SAND, wet. Very loose, dark brown and gray, silty SAND to sandy SILT with trace organics and rootlets, wet. Very loose, dark gray, silty, fine SAND with lenses of dark brown, organic SILT, wet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 0-1-0 0-1-2 GM SM ML SM SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-23 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-24 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/12/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2B DATE STARTED: 9/12/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.7 feet Appendix A Previous Explorations Site 2: HWA Report 2021-002 Task 2: BH-1 through BH-3 KPG-114-01: B-1 through B-3 and CPT-1, logged by GeoDesign Site 2: HWA Report 2021-002 Task 2: Borings BH-1 through BH-3 KPG-114-01: Borings B-1 through B-3 and CPT-1, logged by GeoDesign HWA, 2022, Borings BH-1 through BH-3 GeoDesign, 2019, Borings B-1 through B-3 and CPT-01GeoDesign, Inc., 2019, Borings B-1 through B-3 and CPT-01 A-12021-002-21 City of Renton Airport-AE On-Call Rainier Quonset Parking Area Settlement Renton, Washington SYMBOLS USED ON EXPLORATION LOGS LEGEND OF TERMS AND Clean Gravel (little or no fines) More than 50% of Coarse Fraction Retained on No. 4 Sieve Gravel with SM SC ML MH CH OH RELATIVE DENSITY OR CONSISTENCY VERSUS SPT N-VALUE Very Loose Loose Medium Dense Very Dense Dense N (blows/ft) 0 to 4 4 to 10 10 to 30 30 to 50 over 50 Approximate Relative Density(%) 0 - 15 15 - 35 35 - 65 65 - 85 85 - 100 COHESIVE SOILS Consistency Very Soft Soft Medium Stiff Stiff Very Stiff Hard N (blows/ft) 0 to 2 2 to 4 4 to 8 8 to 15 15 to 30 over 30 Approximate Undrained Shear Strength (psf) <250 250 - No. 4 Sieve Sand with Fines (appreciable amount of fines) amount of fines) More than 50% Retained on No. 200 Sieve Size Sand and Sandy Soils Clean Sand (little or no fines) 50% or More of Coarse Fraction Passing Fine Grained Soils Silt and Clay Liquid Limit Less than 50% 50% or More Passing No. 200 Sieve Size Silt and Clay Liquid Limit 50% or More 500 500 - 1000 1000 - 2000 2000 - 4000 >4000 DensityDensity USCS SOIL CLASSIFICATION SYSTEM Coarse Grained Soils Gravel and Gravelly Soils Highly Organic Soils GROUP DESCRIPTIONS Well-graded GRAVEL Poorly-graded GRAVEL Silty GRAVEL Clayey GRAVEL Well-graded SAND Poorly-graded SAND Silty SAND Clayey SAND SILT Lean CLAY Organic SILT/Organic CLAY Elastic SILT Fat CLAY Organic SILT/Organic CLAY PEAT MAJOR DIVISIONS GW SP CL OL PT GP GM GC SW COHESIONLESS SOILS Fines (appreciable LEGEND 2021-002-21 RENTON AIRPORT.GPJ 7/21/22 PROJECT NO.:FIGURE: Coarse sand Medium sand SIZE RANGE Larger than 12 in Smaller than No. 200 (0.074mm) Gravel 3 in to 12 in 3 in to No 4 (4.5mm) No. 4 (4.5 mm) to No. 200 (0.074 mm) COMPONENT DRY Absence of moisture, dusty, dry to the touch. MOIST COMPONENT DEFINITIONS time of drilling) Groundwater Level (measured in well or open hole after water level stabilized) Groundwater Level (measured at TEST SYMBOLS GROUNDWATER SYMBOLS AL Atterberg Limits: California Bearing Ratio CN Consolidation DD OC Organic Content pH pH of Soils 12 - 30% Clayey, Silty, Sandy, Gravelly 3 in to 3/4 in 3/4 in to No 4 (4.5mm) No. 4 (4.5 mm) to No. 10 (2.0 mm) No. 10 (2.0 mm) to No. 40 (0.42 mm) No. 40 (0.42 mm) to No. 200 (0.074 mm) NOTES: Soil classifications presented on exploration logs are based on visual and laboratory observation. Density/consistency, color, modifier (if any) GROUP NAME, additions to group name (if any), moisture content. Proportion, gradation, and angularity of constituents, additional comments. (GEOLOGIC INTERPRETATION) Please refer to the discussion in the report text as well as the exploration logs for a more complete description of subsurface conditions. Soil descriptions are presented in the following general order: < 5% Damp but no visible water. WET Visible free water, usually soil is below water table. Boulders Cobbles Coarse gravel Fine gravel Sand MOISTURE CONTENT COMPONENT PROPORTIONS Fine sand Silt and Clay 5 - 12% PROPORTION RANGE DESCRIPTIVE TERMS Clean Slightly (Clayey, Silty, Sandy) 30 - 50% Components are arranged in order of increasing quantities. Very (Clayey, Silty, Sandy, Gravelly) PID PP CBR DS Direct Shear GS Grain Size Distribution K Permeability Moisture/Density Relationship (Proctor) Resilient Modulus Photoionization Device Reading Res. Resistivity SG Percent Fines%F MD MR Specific Gravity CD Consolidated Drained Triaxial Torvane (Approx. Shear Strength, tsf) Dry Density (pcf) CU Consolidated Undrained Triaxial TV UU Unconsolidated Undrained Triaxial UC Unconfined Compression SAMPLE TYPE SYMBOLS Non-standard Penetration Test (3.0" OD Split Spoon with Brass Rings) (140 lb. hammer with 30 in. drop) Shelby Tube Small Bag Sample Large Bag (Bulk) Sample Core Run 2.0" OD Split Spoon (SPT) PL = Plastic Limit, LL = Liquid Limit Pocket Penetrometer (Approx. Comp. Strength, tsf) 3-1/4" OD Split Spoon CN OC AL GS AL GS S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 Moderately Distressed Asphalt - 4'' (ASPHALT PAVEMENT) Very loose, dark-brown, sandy, GRAVEL, asphalt chips in sample. (Base Course) Very loose, dark-brown, Wood Chips, moist. (Wood Chips - FILL) Material consists of wood chips with sand and organic silt alluvium. Organic content: 35% Very soft, dark gray-brown, sandy organic SILT, wet, low plasticity. (ALLUVIUM) Wood chips intermixed in sample. Very soft, very dark gray, sandy organic SILT, high plasticity. Borehole terminated at approximately 22.5 feet bgs. Groundwater encountered at approximately 7.5 feet bgs. Borehole abandoned with 3/4'' Bentonite chips and concrete cap. 4-1-1 0/18" 0/18" 0/18" 0/18" 0/18" OL OH BORING-DSM 2021-002-21 RENTON AIRPORT.GPJ 7/25/22 FIGURE:PROJECT NO.:2021-002-21 Renton, Washington Rainier Quonset Parking Area Settlement City of Renton Airport-AE On-Call Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION BH-1 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-2 DE P T H (f e e t ) 0 5 10 15 20 25 EL E V A T I O N (f e e t ) DATE COMPLETED: 6/1/2022 DRILLING COMPANY: Holocene Drilling DRILLING METHOD: HSA - Dietrich D-70 LOCATION: Rainier Flight School Parking Lot. See Figure 2. DATE STARTED: 6/1/2022 SAMPLING METHOD: SPT w/Autohammer LOGGED BY: L. Cressler >>131 OC AL GS S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 Moderately Distressed Asphalt - 4'' (ASPHALT PAVEMENT) Very loose, dark-brown, sandy, GRAVEL, asphalt chips in sample. (Base Course) Loose to very loose, dark-brown, Wood Chips, moist. (Wood Chips - FILL) Organic Content: 90.3% No recovery, S-5. Very soft, very dark gray, sandy organic SILT, wet, high plasticity. (ALLUVIUM) Wood chips intermixed in sample. No recovery, S-8. 4-1-1 2-1-3 3-3-3 3-1-1 1/18'' 1/18'' 0/18" 0/18" 0/18" OH BORING-DSM 2021-002-21 RENTON AIRPORT.GPJ 7/25/22 FIGURE:PROJECT NO.:2021-002-21 Renton, Washington Rainier Quonset Parking Area Settlement City of Renton Airport-AE On-Call Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION BH-2 PAGE: 1 of 2 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-3 DE P T H (f e e t ) 0 5 10 15 20 25 EL E V A T I O N (f e e t ) DATE COMPLETED: 6/1/2022 DRILLING COMPANY: Holocene Drilling DRILLING METHOD: HSA - Dietrich D-70 LOCATION: Rainier Flight School Parking Lot. See Figure 2. DATE STARTED: 6/1/2022 SAMPLING METHOD: SPT w/Autohammer LOGGED BY: L. Cressler 195 AL GS S-10 S-11 S-12 S-13 Wood chips intermixed in sample. Intermixed wood chips, sampler went through log. Wood chips intermixed in sample. Borehole terminated at approximately 41.5 feet bgs. Groundwater encountered at approximately 8.5 feet bgs. Borehole abandoned with 3/4'' Bentonite chips. 0/18" 0-0-4 0-0-1 0/18" BORING-DSM 2021-002-21 RENTON AIRPORT.GPJ 7/25/22 FIGURE:PROJECT NO.:2021-002-21 Renton, Washington Rainier Quonset Parking Area Settlement City of Renton Airport-AE On-Call Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION BH-2 PAGE: 2 of 2 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-3 DE P T H (f e e t ) 25 30 35 40 45 50 EL E V A T I O N (f e e t ) DATE COMPLETED: 6/1/2022 DRILLING COMPANY: Holocene Drilling DRILLING METHOD: HSA - Dietrich D-70 LOCATION: Rainier Flight School Parking Lot. See Figure 2. DATE STARTED: 6/1/2022 SAMPLING METHOD: SPT w/Autohammer LOGGED BY: L. Cressler 139 GS DD DD S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 Moderately Distressed Asphalt - 4'' (ASPHALT PAVEMENT) Dense, dark-brown, sandy, GRAVEL. (Base Course) Medium dense to loose, dark-brown, poorly-graded, GRAVEL with silt and sand, wet. (GRAVEL BACKFILL) No recovery, S-1. very loose, dark-brown, Wood Chips, moist. (Wood Chips - FILL) Sample mixed woodchips gravel; Dry unit weight 81.7 pcf. No recovery, S-5. Saturated wood chips from auger. Loose, very dark gray, silty SAND with organics. Dry Unit Weight : 64.4 pcf Very soft, dark gray-brown, sandy organic SILT, wet, low plasticity. (ALLUVIUM) Wood chips intermixed in sample. Borehole terminated at approximately 22.5 feet bgs. Groundwater encountered at approximately 7.5 feet bgs. Borehole abandoned with 3/4'' Bentonite chips and concrete cap. 5-5-11 2-2-2 3-2-2 0/18" 0/18" GP GM SM OL BORING-DSM 2021-002-21 RENTON AIRPORT.GPJ 7/25/22 FIGURE:PROJECT NO.:2021-002-21 Renton, Washington Rainier Quonset Parking Area Settlement City of Renton Airport-AE On-Call Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION BH-3 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-4 DE P T H (f e e t ) 0 5 10 15 20 25 EL E V A T I O N (f e e t ) DATE COMPLETED: 6/1/2022 DRILLING COMPANY: Holocene Drilling DRILLING METHOD: HSA - Dietrich D-70 LOCATION: Rainier Flight School Parking Lot. See Figure 2. DATE STARTED: 6/1/2022 SAMPLING METHOD: SPT w/Autohammer LOGGED BY: L. Cressler 114 RELATIVE DENSITY - COARSE-GRAINED SOIL Relative Density Standard Penetration Resistance Dames & Moore Sampler (140-pound hammer) Dames & Moore Sampler (300-pound hammer) Very Loose 0 – 4 0 – 11 0 – 4 Loose 4 – 10 11 – 26 4 – 10 Medium Dense 10 – 30 26 – 74 10 – 30 Dense 30 – 50 74 – 120 30 – 47 Very Dense More than 50 More than 120 More than 47 CONSISTENCY - FINE-GRAINED SOIL Consistency Standard Penetration Resistance Dames & Moore Sampler (140-pound hammer) Dames & Moore Sampler (300-pound hammer) Unconfined Compressive Strength (tsf) Very Soft Less than 2 Less than 3 Less than 2 Less than 0.25 Soft 2 – 4 3 – 6 2 – 5 0.25 – 0.50 Medium Stiff 4 – 8 6 – 12 5 – 9 0.50 – 1.0 Stiff 8 – 15 12 – 25 9 – 19 1.0 – 2.0 Very Stiff 15 – 30 25 – 65 19 – 31 2.0 – 4.0 Hard More than 30 More than 65 More than 31 More than 4.0 PRIMARY SOIL DIVISIONS GROUP SYMBOL GROUP NAME COARSE- GRAINED SOIL (more than 50% retained on No. 200 sieve) GRAVEL (more than 50% of coarse fraction retained on No. 4 sieve) CLEAN GRAVEL (< 5% fines) GW or GP GRAVEL GRAVEL WITH FINES (≥ 5% and ≤ 12% fines) GW-GM or GP-GM GRAVEL with silt GW-GC or GP-GC GRAVEL with clay GRAVEL WITH FINES (> 12% fines) GM silty GRAVEL GC clayey GRAVEL GC-GM silty, clayey GRAVEL SAND (50% or more of coarse fraction passing No. 4 sieve) CLEAN SAND (<5% fines) SW or SP SAND SAND WITH FINES (≥ 5% and ≤ 12% fines) SW-SM or SP-SM SAND with silt SW-SC or SP-SC SAND with clay SAND WITH FINES (> 12% fines) SM silty SAND SC clayey SAND SC-SM silty, clayey SAND FINE-GRAINED SOIL (50% or more passing No. 200 sieve) SILT AND CLAY Liquid limit less than 50 ML SILT CL CLAY CL-ML silty CLAY OL ORGANIC SILT or ORGANIC CLAY Liquid limit 50 or greater MH SILT CH CLAY OH ORGANIC SILT or ORGANIC CLAY HIGHLY ORGANIC SOIL PT PEAT MOISTURE CLASSIFICATION ADDITIONAL CONSTITUENTS Term Field Test Secondary granular components or other materials such as organics, man-made debris, etc. Percent Silt and Clay In: Percent Sand and Gravel In: dry very low moisture, dry to touch Fine-Grained Soil Coarse- Grained Soil Fine-Grained Soil Coarse- Grained Soil moist damp, without visible moisture < 5 trace trace < 5 trace trace 5 – 12 minor with 5 – 15 minor minor wet visible free water, usually saturated > 12 some silty/clayey 15 – 30 with with > 30 sandy/gravelly Indicate % SOIL CLASSIFICATION SYSTEM TABLE A-2 Drove 3-inch sampler to get recovery at 5.0 feet. DD = 72 pcf P200 = 83% LL = 61% PL = 37% P200 = 52% P P 0.5 2.0 4.0 14.5 17.5 33.5 DD CON P200 ATT P200 ASPHALT CONCRETE (6.5 inches). Medium dense to dense, gray GRAVEL with sand (GP), trace silt; moist - FILL. Very loose, gray, silty SAND with gravel (SM); moist - FILL. Very soft, dark gray SILT with gravel and organics (ML); wet - ALLUVIUM. minor sand, trace organics; sand is fine at 7.5 feet gray, with sand at 11.0 feet Very soft, gray SILT (MH); wet, interbeds of dark gray, silty SAND with organics - ALLUVIUM. Very soft, gray SILT with sand (ML), trace gravel and organics; wet - ALLUVIUM. without gravel; stratified interbeds of silty SAND (2 to 3 inches thick) at 20.0 feet sandy at 22.0 feet without interbeds at 25.0 feet trace gravel, without organics at 30.0 feet Very loose, gray, silty SAND (SM), trace organics; wet, sand is coarse, stratified interbeds of SILT (2 to 3 inches thick) - ALLUVIUM. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-1 COMPLETED:09/04/19 FIGURE A-1 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 0 50 100 0 50 100 0 5 10 15 20 25 30 35 40 3 0 0 0 0 0 0 0 0 0 2 3 P200 = 26% Driller chatter at 69.0 feet 58.0 63.0 69.0 73.0 P200 without organics at 40.0 feet without interbeds at 45.0 feet medium dense, trace gravel at 50.0 feet loose at 55.0 feet Stiff, gray, sandy SILT (ML), minor gravel; wet - ALLUVIUM. Medium dense, gray, silty SAND (SM), trace gravel; wet - ALLUVIUM. Very dense, gray GRAVEL with silt and sand (GP-GM); wet - GLACIAL TILL. Very dense, gray, silty SAND (SM); wet - GLACIAL TILL. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-1 COMPLETED:09/04/19 FIGURE A-1 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G (continued) DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 44-50/6" 0 50 100 0 50 100 40 45 50 55 60 65 70 75 80 3 2 16 7 10 11 86 Surface elevation was not measured at the time of exploration. 83.5 97.5 101.5 (continued from previous page) Hard, gray, sandy SILT (ML); moist - GLACIAL TILL. Hard, gray CLAY with sand (CL); moist - GLACIAL TILL. Exploration completed at a depth of 101.5 feet. Hammer efficiency factor is 83.0 percent. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-1 COMPLETED:09/04/19 FIGURE A-1 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G (continued) DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 40-48-50/4.5" 24-24-50/5" 0 50 100 0 50 100 80 85 90 95 100 105 110 115 120 92 85 83 No recovery at 7.5 feet. Driller increased thickness of mud at 11.0 feet. No recovery; driller increased thickness of mud at 12.5 feet. Filled hole with bentonite and then drilled back through at 20.0 feet. P200 = 47% OC = 10.6% DD = 47 pcf P 0.5 2.0 4.5 19.0 33.0 35.5 38.0 P200 OC DD CON ASPHALT CONCRETE (6.0 inches). Dense, gray GRAVEL with sand (GP), trace silt; moist, gravel is angular - FILL. Medium dense, gray, silty SAND with gravel (SM), minor organics; moist - FILL. Very loose, gray, silty SAND (SM); wet - ALLUVIUM. gray; moist to wet at 10.0 feet trace gravel; stratified beds of SILT (up to 4 inches thick) at 15.0 feet Soft, dark gray, sandy SILT with organics (ML); wet - ALLUVIUM. very soft, gray, with sand, trace gravel and organics; stratified beds of silty SAND (2 to 4 inches thick) at 25.0 feet without gravel at 27.5 feet sandy at 30.0 feet Very, loose, gray, silty SAND (SM); wet - ALLUVIUM. Soft, brown ORGANIC SILT (OL); wet - ALLUVIUM. Soft, gray-brown SILT with sand and organics (ML); wet - ALLUVIUM. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-2 COMPLETED:09/05/19 FIGURE A-2 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 0 50 100 0 50 100 0 5 10 15 20 25 30 35 40 41 15 3 2 0 3 4 4 4 0 0 0 3 LL = 40% PL = 16% Rock in SPT at 55.0 feet. Surface elevation was not measured at the time of exploration. 41.5 49.0 51.0 59.0 66.5 ATT (continued from previous page) Very soft, gray CLAY with sand (CL), trace organics; wet, clay has low plasticity - ALLUVIUM. Very stiff, gray, sandy SILT (ML), trace organics; wet - ALLUVIUM. Dense, gray, silty SAND (SM), trace gravel; wet - ALLUVIUM. medium dense, with gravel at 55.0 feet Hard, gray SILT with sand (ML); wet - GLACIAL TILL. Exploration completed at a depth of 66.5 feet. Hammer efficiency factor is 83.0 percent. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-2 COMPLETED:09/05/19 FIGURE A-2 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G (continued) DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 0 50 100 0 50 100 40 45 50 55 60 65 70 75 80 3 0 30 14 71 73 Flush-mount with 1.5 feet concrete backfill 1-inch tremie pipe Cement-bentonite grout OC = 4.3% P200 = 70% LL = 68% PL = 36% Vibrating wire piezometer #1902746 set at 28.3 feet P200 = 64% Surface elevation was not measured that time of exploration. 0.7 2.5 5.0 9.5 10.5 18.5 26.0 31.5 OC P200 ATT P200 ASPHALT CONCRETE (8.0 inches). Dense, gray GRAVEL with sand (GP), trace silt; moist, gravel is angular - FILL. Medium dense, dark gray, silty SAND with debris (SM); wet, debris is wood chips (approximately 50% by volume) - FILL. loose, gray, trace organics at 3.5 feet Soft, gray-brown, sandy SILT with organics (ML); wet - ALLUVIUM. gray, trace organics at 5.5 feet stratified interbeds of silty SAND (2 to 4 inches thick) at 7.5 feet Very loose, gray, silty SAND (SM), trace gravel; wet - ALLUVIUM. Very soft, gray-brown SILT with sand (ML), minor organics; wet - ALLUVIUM. gray, sandy, trace organics, without organics at 13.5 feet Very soft, brown-orange ORGANIC SILT with sand (OL); wet - ALLUVIUM. gray-brown at 24.0 feet Very soft, gray, sandy SILT (ML); wet - ALLUVIUM. medium stiff at 30.0 feet Exploration completed at a depth of 31.5 feet. Hammer efficiency factor is 83.0 percent. INSTALLATION AND COMMENTS MOISTURE CONTENT % CORE REC%RQD% BLOW COUNT BORING B-3 COMPLETED:09/16/19 FIGURE A-3 BORING BIT DIAMETER:6 inches/ 4 7/8 inches RENTON, WA KPG-114-01 RAINIER FLIGHT SERVICE – PROPOSED HANGAR MATERIAL DESCRIPTION TE S T I N G DEPTH FEET LOGGED BY:J. Westergreen DECEMBER 2019 BORING METHOD:mud rotary (see document text) DRILLED BY:Holt Services, Inc. GR A P H I C L O G SA M P L E EL E V A T I O N DE P T H BO R I N G L O G - G D I - N V 5 - 1 P E R P A G E K P G - 1 1 4 - 0 1 - B 1 _ 3 . G P J G D I _ N V 5 . G D T P R I N T D A T E : 1 2 / 9 / 1 9 : K M 0 50 100 0 50 100 0 5 10 15 20 25 30 35 40 32 12 4 4 1 1 0 0 0 0 6 The reported coordinates were acquired from hand-held GPS equipment and are only approximate locations. The coordinates should not be used for design purposes. 0 100 200 300 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 qt (tsf) De p t h ( f e e t ) 0.0 2.0 4.0 6.0 8.0 fs (tsf) 0.0 2.5 5.0 7.5 Rf (%) 0 100 200 3000 u (ft) 0 3 6 9 SBT Qtn GeoDesign Job No: 19-59045 Date: 2019-09-24 08:42 Site: Renton Airport Sounding: CPT-01 Cone: 595:T1500F15U500 Max Depth: 21.075 m / 69.14 ft Depth Inc: 0.025 m / 0.082 ft Avg Int: Every Point File: 19-59045_SP01.COR Unit Wt: SBTQtn (PKR2009) SBT: Robertson, 2009 and 2010 Coords: Lat: 47.49689 Long: -122.21896 UndefinedSand Mixtures Sand MixturesSands Sands Sand MixturesSilt Mixtures Silt Mixtures Sands Silt Mixtures Clays Sand Mixtures Silt Mixtures Clays Silt Mixtures Clays Silt Mixtures Clays Silt Mixtures Silt MixturesClaysSilt Mixtures ClaysSilt Mixtures Silt MixturesClays Clays Undefined Clays Silt Mixtures Silt Mixtures Sand Mixtures Clays Silt Mixtures Silt MixturesSilt Mixtures Sand MixturesSilt Mixtures Sensitive, Fine Grained ClaysSand MixturesSands Sands Gravelly Sand to SandStiff Sand to Clayey SandSandsStiff Sand to Clayey Sand Sands Sands Sands Very Stiff Fine GrainedStiff Sand to Clayey Sand Very Stiff Fine Grained Very Stiff Fine Grained Sand Mixtures Very Stiff Fine GrainedUndefined 24.9 53.5 54.4 68.0 Ueq(ft) Refusal Refusal Refusal Refusal Dissipation, equilibrium not achievedDissipation with estimated Ueq value Equilibrium Pore Pressure (Ueq)Hydrostatic Line Pre-Punch Pre-Punch Pre-Punch Pre-Punch Appendix A Previous Explorations Site 3: HWA Report 2023-027 B-15 Site 3: HWA Report 2023-027 Boring B-15HWA, 2024, Boring B-15 GS GS GS GS S-1 S-2 S-3 S-4 4 inches Hot Mix Asphalt. (HMA) 5 inches Crushed Base. Dense, brown, sandy, fine, crushed GRAVEL with silt, moist. (CRUSHED BASE) Medium dense, very dark gray, silty SAND with gravel and cobbles, moist. (FILL) Loose, dark gray SAND with silt, gravel and cobbles. Interbedded with silty SAND, moist. Loose, very dark gray, poorly graded GRAVEL with silt, wet. Very loose, very dark gray, silty SAND with gravel, wet. (ALLUVIUM) Last cobble at 7.5-feet BGS. Very loose, very dark grayish-brown, silty SAND, wet. Encountered 4 feet of heave, removed heave by re-drilling to 10 feet. Drove sampler at 10 feet. Borehole was terminated at 11.5 feet below ground surface. Groundwater seepage was observed at 4.5 feet below ground surface. 1-3-2 1-2-0 SM SP SM GP SM SM BORING-DSM 2023-027.GPJ 12/21/23 FIGURE:PROJECT NO.:2023-027 Associated Improvements - Phase 1 Predesign Taxiway A Rehabilitation/Reconstruction & Renton Municipal Airport Renton, Washington Natural Water Content US C S S O I L C L A S S Water Content (%) NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated DESCRIPTION B-15 PAGE: 1 of 1 (b l o w s / 6 i n c h e s ) GR O U N D W A T E R PE N . R E S I S T A N C E Liquid Limit SY M B O L 0 10 20 30 40 50 0 20 40 60 80 100 SA M P L E T Y P E SA M P L E N U M B E R OT H E R T E S T S Plastic Limit BORING: and therefore may not necessarily be indicative of other times and/or locations. (140 lb. weight, 30" drop) Blows per foot Standard Penetration Test A-16 DE P T H (f e e t ) 0 5 10 15 25 20 15 EL E V A T I O N (f e e t ) DATE COMPLETED: 9/14/2023 DRILLING COMPANY: Holt Services, Inc. DRILLING METHOD: Terrasonic TSi 150 LOCATION: See Figure 2D DATE STARTED: 9/14/2023 SAMPLING METHOD: SPT w/Autohammer and Grab LOGGED BY: R. Mueller SURFACE ELEVATION: 25.4 feet Renton Municipal Airport | ATCT Siting Study Report 57 Appendix E. Environmental Overview Memo kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 ENVIRONMENTAL OVERVIEW To: Renton Municipal Airport From: Teresa Gresham, Kimley-Horn Date: February 18, 2026 Subject: Air Traffic Control Tower Siting Study for the Renton Municipal Airport Environmental Overview This memorandum provides an environmental overview of potential sites identified as part of the Air Traffic Control Tower (ATCT) Siting Study for the Renton Municipal Airport (RNT). The project proposes to relocate the existing ATCT. Four potential sites have been identified for relocation and environmental considerations are documented below. This memo is organized in the following sections: Background Water Resources Protected Species Cultural Resources Contaminated Soils Viewshed Anticipated Permits & Environmental Compliance Summary Information presented in this memo is based on a desktop review of available online data and mapping. Additional surveys and analyses may be required to support a National Environmental Policy Act (NEPA) document when determined to be required for the ATCT relocation. BACKGROUND Renton Municipal Airport is within the City of Renton in King County. It is located on the south shore of Lake Washington, approximately 10 miles southeast of downtown Seattle. The airport has one runway that is 5,380 feet in length and 200 feet wide. The existing ATCT is 55 feet tall. Figure 1 shows the four potential ATCT site locations under consideration: Site 1: Adjacent to the existing ATCT Site 2: Current site of/adjacent to the RNT Maintenance Shop Site 3: Northwestern corner of RNT Site 4: West side of Rainier Avenue N - midfield Prepared by: Kimley-Horn, December 2025 Figure 1: Potential ATCT Site Locations Page 2 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 WATER RESOURCES Water resources are shown in Figure 2 – Environmental Overview Map. The Washington State National Hydrography Dataset (NHD), U.S. Fish & Wildlife Service National Wetlands Inventory (NWI), and Federal Emergency Management Agency (FEMA) flood map data were utilized to analyze the presence of water resources within the project area. No water resources are located within Sites 1 or 2, and all sites are outside of the FEMA 100-year floodplain. Lake Washington is at the northern end of the project area. One NHD mapped stream labeled as “intermittent/ephemeral” traverses north/south through the center of Site 3 and the western side of Site 4 (see the NHD Hydrography map in Appendix A). A delineation was not conducted, but based on a site visit, the stream does not appear to be present. Site 3 is near Lake Washington. A Shoreline Substantial Development Permit (SSDP) from the Washington State Department of Ecology would be required for Site 3A due to its proximity to the lake. PROTECTED SPECIES The U.S. Fish & Wildlife Service Information for Planning and Consultation (IPaC) tool and Washington Department of Fish & Wildlife Priority Habitats and Species (PHS) program were used to identify protected species that may have the potential to occur within or adjacent to the sites. The same federal species were identified for all sites, listed in Table 1 (see IPaC Report in Appendix B). Table 1: Federally protected species (IPaC, January 15, 2026) Scientific Name Common Name Brachyramphus marmoratus Marbled murrelet Coccyzus americanus Yellow-billed cuckoo Actinemys marmorata Northwestern pond turtle Salvelinus confluentus Bull trout Danaus plexippus Monarch butterfly Bombus suckleyi Suckley's cuckoo bumble bee Washington’s PHS dataset does not list any known occurrences of protected species or habitats within or near the four sites. The state listed species are included in Appendix B. None of the sites are proposed to include construction within water. As a result, northwestern pond turtle and bull trout would not be affected. Sites 1-3 are previously disturbed and mostly paved, and therefore do not have potential for protected species habitat. Site 4 is a mix of previously developed land and vegetated area; a habitat survey may be required during the NEPA phase to confirm potential for habitat or presence of protected species. CULTURAL RESOURCES Based on a review of the Department of Archaeology and Historic Preservation (DAHP) Washington Information System for Architectural and Archaeological Records Data (WISAARD) tool, there are no listed cultural resources in the project vicinity. However, WISAARD includes an Archaeological Risk Assessment Model that uses environmental factors to recommend whether an archaeological survey is warranted. Areas are categorized 1 to 5, with Zone 5 being very high risk and Zone 1 being the lowest risk. All sites overlap a Zone 4 or higher. Table 2 shows the zone(s) for each site. Page 3 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 Table 2: Archaeological Risk Assessment Model (DAHP WISAARD) Potential ATCT Site Locations Risk Assessment Zone(s) Site 1 3 - Survey Recommended: Moderate Risk 4 - Survey Highly Advised: High Risk Site 2 4 - Survey Highly Advised: High Risk Site 3 4 - Survey Highly Advised: High Risk 5 - Survey Highly Advised: Very High Risk Site 4 3 - Survey Recommended: Moderate Risk 4 - Survey Highly Advised: High Risk CONTAMINATED SOILS The Washington State Department of Ecology (WSDOE) maintains a database of facilities and sites of environmental interest. Table 3 shows sites identified within 100 feet of each site. The WSDOE database includes the following site types: • State cleanup sites • Solid waste facilities • Federal Superfund cleanup sites • Underground storage tanks • Hazardous waste generators • Dairies Table 3: Facilities and Sites of Environmental Interest Listing Type (FSID) Original Name Notes Address Renton Municipal Airport Emergency/Haz Chem Rpt TIER2 (FS ID: 16679) Renton Municipal Airport Air Traffic Control Tower Renton Municipal Airport SEA Project Site (FS ID: 2249159) Renton Municipal Airport Seaplane Base Hazardous Waste Generator (FS ID: 20554) Renton Municipal Airport Fire Training Area Closed and remediated. Construction SW GP (FS ID: 15718) Renton Municipal Airport Taxiway Bravo Taxiway repaving occurred approximately 12 years ago. Site 1 No sites identified Site 2 Emergency/Haz Chem Rpt TIER2 (FS ID: 22421) Rainier Flight Service Fuel station has been closed and remediated. 800 W Perimeter Rd Site 3 LUST Facility (FS ID: 21429821) Castaways Restaurant Building has been closed and removed. 1101 W Perimeter Rd Site 4 No sites identified Page 4 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 In addition, a former sawmill was located on the Airport property, adjacent to the previous location of the Lake Washington shoreline at Site 2. The former sawmill site has led to subsurface accumulation of sawdust, creating unstable soil conditions and the ground is sinking in this area. VIEWSHED The Google Earth Pro Viewshed Tool was used to estimate the extent to which non-airport properties may be visually affected by a new tower. As shown in the images below, the number of properties that may be able to see the new tower are smallest with Site 1, and similar with Site 2. An ATCT on Site 3 would be visible from a larger number of properties, particularly close to the airport. An ATCT on Site 4 would also be visible from a larger number of properties, with most being located further west. Site 1 Site 2 Site 3 Site 4 Page 5 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 Table 4 shows the viewshed heights assumed for each site. The center of each site was used for this assessment. Table 4: Viewshed Heights Potential ATCT Site Locations Viewshed Heights Existing 55 ft Site 1 81 ft Site 2 166 ft Site 3 123 ft Site 4 156 ft A NTICIPATED PERMITS & ENVIRONMENTAL COMPLIANCE If the stream shown on the NHD map is present and determined to be jurisdictional, it is anticipated that construction on Sites 3 or 4 would qualify under a Section 404 Nationwide Permit administered by the U.S. Army Corps of Engineers (USACE) and corresponding Section 401 Water Quality Certification (WQC) administered by the Washington State Department of Ecology. A Shoreline Substantial Development Permit (SSDP) from the Washington State Department of Ecology would be required for Site 3A due to its proximity to the lake. Environmental clearance is required under the National Environmental Policy Act (NEPA). As noted in Federal Aviation Administration (FAA) Order 1050.1G, relocation of ATCTs usually require an Environmental Assessment (EA). In support of the NEPA document, environmental technical studies may be required. Based on the desktop review, detailed analyses are most likely for water and cultural resources. The Duwamish Tribe has requested information about all airport projects, as well as an Inadvertent Discovery Plan. SUMMARY Table 5 summarizes the findings of this environmental overview. Table 5: Environmental Overview Summary Environmental Resource Summary Water Resources The National Hydrography Dataset indicates that a stream traverses through Site 3 and 4, although there may not be a stream present. Site 3 is near Lake Washington. Protected Species Site 4 has potential for protected species habitat. The other sites are disturbed with no potential for habitat. Cultural Resources No listed cultural resources are within any sites. However, all sites are listed as high risk for archaeological resources, and Site 3 overlaps an area mapped as very high risk. Contaminated Soils None of the sites contain known contaminated soils. The unstable soils under Site 2 may complicate construction at this location. Viewshed An ATCT at Sites 1 and 2 would be visible from a small number of properties, in a similar location to the existing ATCT. An ATCT at Sites 3 and 4 would be visible from a larger number of properties. Anticipated Permits A Section 404 Nationwide Permit and a Section 401 Water Quality Certification would be required for Sites 3 and 4 if the mapped stream is present and determined to be jurisdictional by the US Corps of Engineers. A Shoreline Substantial Development Permit would be required for Site 3A due to its proximity to Lake Washington. An Inadvertent Discovery Plan and project reporting will be provided to the Duwamish Tribe for all sites. Page 6 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 APPENDIX Page 7 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 APPENDIX A: Washington State National Hydrography Database Map Page 8 kimley-horn.com 1201 Third Avenue Suite 2800, Seattle, WA, 98101 206-607-2600 APPENDIX B: Protected Species Data STATE LISTED SPECIES Revised January 2026 The Washington Fish and Wildlife Commission has classified the following 48 species as Endangered, Threatened, or Sensitive. The federal status of species under the Endangered Species Act differs in some cases from state status; federal status is indicated by: Federal Endangered (FE), Threatened (FT), Candidate (FC), USFWS has made a 90-day finding that listing may be warranted (90d), or a NOAA Species of Concern (FSC). STATE ENDANGERED A species native to the state of Washington that is seriously threatened with extinction throughout all or a significant portion of its range within the state. The 37 State Endangered species are designated in Washington Administrative Code 220-610-00 STATE THREATENED A species native to the state of Washington that is likely to become endangered within the foreseeable future throughout a significant portion of its range within the state without cooperative management or removal of threats. The 4 State Threatened species are designated in Washington Administrative Code 220-200-100 STATE SENSITIVE A species native to the state of Washington that is vulnerable or declining and is likely to become endangered or threatened in a significant portion of its range within the state without cooperative management or removal of threats. The 7 State Sensitive species are designated in Washington Administrative Code 220-200- 100. MAMMALS (15) Fin Whale FE Sei Whale FE Blue Whale FE Humpback Whale FT/FE# #Mexico DPS=T; Central American DPS=E North Pacific Right Whale FE Sperm Whale FE Killer Whale #Southern Residents only FE# Gray Wolf FE# #Federally listed west of north-south line Following Highways 97, 17, and 395. Grizzly Bear FT Lynx FT Fisher Western Gray Squirrel - Cascade Red Fox - Woodland Cariboux FE Pygmy Rabbit FE BIRDS (12) Sandhill Crane - Snowy Plover FT Upland Sandpiperx - Marbled Murrelet FT Tufted Puffin - Columbian Sharp-tailed Grouse - Greater Sage-grouse - Ferruginous Hawk - Northern Spotted Owl FT Yellow-billed Cuckoox FT Streaked Horned Lark FT Oregon Vesper Sparrow 90d REPTILES (3) Northwestern Pond Turtle 90d Leatherback Sea Turtle FE Loggerhead Sea Turtle FE AMPHIBIANS (2) Oregon Spotted Frog FT Northern Leopard Frog - INVERTEBRATES (5 ) Oregon Silverspot Butterflyx FT Island Marble Butterfly FE Taylor’s Checkerspot FE Mardon Skipper - Pinto Abalone - MAMMALS (3) Sea Otter - Mazama Pocket Gopher FT Subsp. glacialis, pugetensis, tumuli, yelmensis, couchi, louieix, melanops Columbian White-tailed Deer FT REPTILES (1) Green Sea Turtle FT xThese species are, or may be, extirpated from all of their historical range in Washington. For more information, check our website: https://wdfw.wa.gov/species-habitats/species Or contact us at: Wildlife program (360) 902-2515 Fish Program (360) 902-2700 For more information on federal status, check the US Fish and Wildlife Service or the NOAA National Marine Fisheries Service MAMMALS (1) Gray Whale FE# #Western North Pacific Stock BIRDS (2) Common Loon - American White Pelican - FISH (3) Pygmy Whitefish - Margined Sculpin - Olympic Mudminnow - AMPHIBIAN (1) Larch Mountain Salamander - _________________________________________ FEDERAL CONSIDERATION White-tailed Ptarmigan……………………proposed FT STATE CANDIDATE SPECIES Revised January 2026 The Washington Department of Fish and Wildlife has designated t he following 69 species as Candidates for listing in Washington as State Endangered, Threatened, or Sensitive. The Department reviews species for listing following procedures in Washington Administrative Code 220-610-110. The federal status of species under the Endangered Species Act differs in some cases from state status; federal status is indicated by: Federal Endangered (FE), Threatened (FT), Candidate (FC), USFWS has made a 90-day finding that listing may be warranted (90d), or a NOAA Fisheries Species of Concern (FSC). MAMMALS (9) Townsend’s big-eared Bat - Keen’s Myotis Bat - White-tailed Jackrabbit - Black-tailed Jackrabbit - Washington Ground Squirrel - Townsend’s Ground Squirrel South of the Yakima River - Olympic Marmot - Wolverine FT Pacific Harbor Porpoise - BIRDS (14) Western Grebe - Clark’s Grebe - Short-tailed Albatross FE Northern Goshawk - Golden Eagle - Cassin’s Auklet - Flammulated Owl - Burrowing Owl - White-headed Woodpecker - Black-backed Woodpecker - Loggerhead Shrike - Slender-billed White-breasted Nuthatch - Sage Thrasher - Sagebrush Sparrow - REPTILES AND AMPHIBIANS (10) Sagebrush Lizard - Common Sharp-tailed Snake - California Mountain Kingsnake - Striped Whipsnake - Dunn’s Salamander - Van Dyke’s Salamander - Cascade Torrent Salamander 90d Western Toad - Columbia Spotted Frog - Rocky Mountain Tailed Frog - FISH (11) Mountain Sucker - Lake Chub - Leopard Dace - Umatilla Dace - River Lamprey - Steelhead Snake River FT Upper Columbia FT Middle Columbia FT Lower Columbia FT Puget Sound FT Bull Trout FT MOLLUSKS (7) Shortface Lanx (snail) - Ashy Pebblesnail - California Floater - Columbia Oregonian (snail) - Poplar Oregonian (snail) - Dalles Sideband (snail) - Blue-gray Taildropper (slug) - Many species of uncertain conservation need are listed in our State Wildlife Action Plan: https://wdfw.wa.gov/species-habitats/at- risk/swap INSECTS (18) Beller’s Ground Beetle - Mann’s Mollusk-eating Ground Beetle - Columbia River Tiger Beetle - Hatch’s Click Beetle - Columbia Clubtail (dragonfly) - Pacific Clubtail (dragonfly) - Sand-verbena Moth - Yuma Skipper - Makah Copper - Chinquapin Hairstreak - Johnson’s Hairstreak - Juniper Hairstreak - Puget Blue - Valley Silverspot - Silver-bordered Fritillary - Monarch FC Great Arctic - Western Bumble Bee 90d For more information, check our website: https://wdfw.wa.gov/species - habitats/species Or contact us: Wildlife Program (360) 902-2515 Fish Program (360) 902-2700 IPaC resource list This report is an automatically generated list of species and other resources such as critical habitat (collectively referred to as trust resources) under the U.S. Fish and Wildlife Service's (USFWS) jurisdiction that are known or expected to be on or near the project area referenced below. The list may also include trust resources that occur outside of the project area, but that could potentially be directly or indirectly affected by activities in the project area. However, determining the likelihood and extent of effects a project may have on trust resources typically requires gathering additional site-specific (e.g., vegetation/species surveys) and project-specific (e.g., magnitude and timing of proposed activities) information. Below is a summary of the project information you provided and contact information for the USFWS office(s) with jurisdiction in the defined project area. Please read the introduction to each section that follows (Endangered Species, Migratory Birds, USFWS Facilities, and NWI Wetlands) for additional information applicable to the trust resources addressed in that section. Location King County, Washington Local office Washington Fish And Wildlife Office (360) 753-9440 (360) 753-9405 1009 College St Se Ste 215 Lacey, WA 98503-1249 https:/ / www.fws.gov/ office/ washington-fish-and-wildlife U.S. Fish & Wildlife ServiceIPaC 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 1/11 Endangered species This resource list is for informational purposes only and does not constitute an analysis of project level impacts. The primary information used to generate this list is the known or expected range of each species. Additional areas of influence (AOI) for species are also considered. An AOI includes areas outside of the species range if the species could be indirectly affected by activities in that area (e.g., placing a dam upstream of a fish population even if that fish does not occur at the dam site, may indirectly impact the species by reducing or eliminating water flow downstream). Because species can move, and site conditions can change, the species on this list are not guaranteed to be found on or near the project area. To fully determine any potential effects to species, additional site-specific and project-specific information is often required. Section 7 of the Endangered Species Act requires Federal agencies to "request of the Secretary information whether any species which is listed or proposed to be listed may be present in the area of such proposed action" for any project that is conducted, permitted, funded, or licensed by any Federal agency. A letter from the local office and a species list which fulfills this requirement can only be obtained by requesting an official species list from either the Regulatory Review section in IPaC (see directions below) or from the local field office directly. For project evaluations that require USFWS concurrence/review, please return to the IPaC website and request an official species list by doing the following: 1. Draw the project location and click CONTINUE. 2. Click DEFINE PROJECT. 3. Log in (if directed to do so). 4. Provide a name and description for your project. 5. Click REQUEST SPECIES LIST. Listed species and their critical habitats are managed by the Ecological Services Program of the U.S. Fish and Wildlife Service (USFWS) and the fisheries division of the National Oceanic and Atmospheric Administration (NOAA Fisheries ). Species and critical habitats under the sole responsibility of NOAA Fisheries are not shown on this list. Please contact NOAA Fisheries for species under their jurisdiction. 1. Species listed under the Endangered Species Act are threatened or endangered; IPaC also shows species that are candidates, or proposed, for listing. See the listing status page for more information. IPaC only shows species that are regulated by USFWS (see FAQ). 2. NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce. The following species are potentially affected by activities in this location: Birds Reptiles Fishes 1 2 NAME STATUS Marbled Murrelet Brachyramphus marmoratus There is final critical habitat for this species. Your location does not overlap the critical habitat. https://ecos.fws.gov/ecp/species/4467 Threatened Yellow-billed Cuckoo Coccyzus americanus There is final critical habitat for this species. Your location does not overlap the critical habitat. https://ecos.fws.gov/ecp/species/3911 Threatened NAME STATUS Northwestern Pond Turtle Actinemys marmorata Wherever found No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/1111 Proposed Threatened NAME STATUS Bull Trout Salvelinus confluentus There is final critical habitat for this species. Your location does not overlap the critical habitat. https://ecos.fws.gov/ecp/species/8212 Threatened 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 2/11 Insects Critical habitats Potential effects to critical habitat(s) in this location must be analyzed along with the endangered species themselves. There are no critical habitats at this location. You are still required to determine if your project(s) may have effects on all above listed species. Bald & Golden Eagles There are Bald Eagles and/or Golden Eagles in your project area. Measures for Proactively Minimizing Eagle Impacts For information on how to best avoid and minimize disturbance to nesting bald eagles, please review the National Bald Eagle Management Guidelines. You may employ the timing and activity-specific distance recommendations in this document when designing your project/activity to avoid and minimize eagle impacts. For bald eagle information specific to Alaska, please refer to Bald Eagle Nesting and Sensitivity to Human Activity. The FWS does not currently have guidelines for avoiding and minimizing disturbance to nesting Golden Eagles. For site-specific recommendations regarding nesting Golden Eagles, please consult with the appropriate Regional Migratory Bird Office or Ecological Services Field Office. If disturbance or take of eagles cannot be avoided, an incidental take permit may be available to authorize any take that results from, but is not the purpose of, an otherwise lawful activity. For assistance making this determination for Bald Eagles, visit the Do I Need A Permit Tool. For assistance making this determination for golden eagles, please consult with the appropriate Regional Migratory Bird Office or Ecological Services Field Office. Ensure Your Eagle List is Accurate and Complete If your project area is in a poorly surveyed area in IPaC, your list may not be complete and you may need to rely on other resources to determine what species may be present (e.g. your local FWS field office, state surveys, your own surveys). Please review the Supplemental Information on Migratory Birds and Eagles, to help you properly interpret the report for your specified location, including determining if there is sufficient data to ensure your list is accurate. For guidance on when to schedule activities or implement avoidance and minimization measures to reduce impacts to bald or golden eagles on your list, see the "Probability of Presence Summary" below to see when these bald or golden eagles are most likely to be present and breeding in your project area. Review the FAQs NAME STATUS Monarch Butterfly Danaus plexippus Wherever found There is proposed critical habitat for this species. Your location does not overlap the critical habitat. https://ecos.fws.gov/ecp/species/9743 Proposed Threatened Suckley's Cuckoo Bumble Bee Bombus suckleyi No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/10885 Proposed Endangered Bald and Golden Eagles are protected under the Bald and Golden Eagle Protection Act and the Migratory Bird Treaty Act (MBTA) . Any person or organization who plans or conducts activities that may result in impacts to Bald or Golden Eagles, or their habitats, should follow appropriate regulations and consider implementing appropriate avoidance and minimization measures, as described in the various links on this page. Additional information can be found using the following links: Eagle Management https://www.fws.gov/program/eagle-management Measures for avoiding and minimizing impacts to birds https://www.fws.gov/library/collections/avoiding-and-minimizing-incidental- take-migratory-birds Nationwide avoidance and minimization measures for birds https://www.fws.gov/sites/default/files/documents/nationwide-standard- conservation-measures.pdf Supplemental Information for Migratory Birds and Eagles in IPaC https://www.fws.gov/media/supplemental-information-migratory- birds-and-bald-and-golden-eagles-may-occur-project-action 2 1 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 3/11 no data survey effort breeding season probability of presence The FAQs below provide important additional information and resources. BREEDING SEASON Probability of Presence Summary The graphs below provide our best understanding of when birds of concern are most likely to be present in your project area. This information can be used to tailor and schedule your project activities to avoid or minimize impacts to birds. Please make sure you read "Supplemental Information on Migratory Birds and Eagles", specifically the FAQ section titled "Proper Interpretation and Use of Your Migratory Bird Report" before using or attempting to interpret this report. Probability of Presence () Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. (A year is represented as 12 4-week months.) A taller bar indicates a higher probability of species presence. The survey effort (see below) can be used to establish a level of confidence in the presence score. One can have higher confidence in the presence score if the corresponding survey effort is also high. How is the probability of presence score calculated? The calculation is done in three steps: 1. The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25. 2. To properly present the pattern of presence across the year, the relative probability of presence is calculated. This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2. 3. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score. To see a bar's probability of presence score, simply hover your mouse cursor over the bar. Breeding Season () Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area. Survey Effort () Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. The number of surveys is expressed as a range, for example, 33 to 64 surveys. To see a bar's survey effort range, simply hover your mouse cursor over the bar. No Data () A week is marked as having no data if there were no survey events for that week. Survey Timeframe Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse. SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Bald Eagle Non-BCC Vulnerable Golden Eagle Non-BCC Vulnerable Bald & Golden Eagles FAQs What does IPaC use to generate the potential presence of bald and golden eagles in my specified location? NAME Bald Eagle Haliaeetus leucocephalus This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities. https://ecos.fws.gov/ecp/species/1626 Breeds Mar 1 to Aug 31 Golden Eagle Aquila chrysaetos This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities. https://ecos.fws.gov/ecp/species/1680 Breeds Mar 1 to Aug 31 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 4/11 The potential for eagle presence is derived from data provided by the Avian Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding, and citizen science datasets and is queried and filtered to return a list of those birds reported as occurring in the 10km grid cell(s) which your project intersects, and that have been identified as warranting special attention because they are an eagle (Bald and Golden Eagle Protection Act requirements may apply). Proper interpretation and use of your eagle report On the graphs provided, please look carefully at the survey effort (indicated by the black vertical line) and for the existence of the "no data" indicator (a red horizontal line). A high survey effort is the key component. If the survey effort is high, then the probability of presence score can be viewed as more dependable. In contrast, a low survey effort line or no data line (red horizontal) means a lack of data and, therefore, a lack of certainty about presence of the species. This list is not perfect; it is simply a starting point for identifying what birds have the potential to be in your project area, when they might be there, and if they might be breeding (which means nests might be present). The list and associated information help you know what to look for to confirm presence and helps guide you in knowing when to implement avoidance and minimization measures to eliminate or reduce potential impacts from your project activities or get the appropriate permits should presence be confirmed. How do I know if eagles are breeding, wintering, or migrating in my area? To see what part of a particular bird's range your project area falls within (i.e. breeding, wintering, migrating, or resident), you may query your location using the RAIL Tool and view the range maps provided for birds in your area at the bottom of the profiles provided for each bird in your results. If an eagle on your IPaC migratory bird species list has a breeding season associated with it (indicated by yellow vertical bars on the phenology graph in your “IPaC PROBABILITY OF PRESENCE SUMMARY” at the top of your results list), there may be nests present at some point within the timeframe specified. If "Breeds elsewhere" is indicated, then the bird likely does not breed in your project area. Interpreting the Probability of Presence Graphs Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. A taller bar indicates a higher probability of species presence. The survey effort can be used to establish a level of confidence in the presence score. How is the probability of presence score calculated? The calculation is done in three steps: The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25. To properly present the pattern of presence across the year, the relative probability of presence is calculated. This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score. Breeding Season () Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area. Survey Effort () Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. No Data () A week is marked as having no data if there were no survey events for that week. Survey Timeframe Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse. Migratory birds Measures for Proactively Minimizing Migratory Bird Impacts Your IPaC Migratory Bird list showcases birds of concern, including Birds of Conservation Concern (BCC), in your project location. This is not a comprehensive list of all birds found in your project area. However, you can help proactively minimize significant impacts to all birds at your project location by implementing the measures in the Nationwide avoidance and minimization measures for birds The Migratory Bird Treaty Act (MBTA) prohibits the take (including killing, capturing, selling, trading, and transport) of protected migratory bird species without prior authorization by the Department of Interior U.S. Fish and Wildlife Service (Service). 1. The Migratory Birds Treaty Act of 1918. 2. The Bald and Golden Eagle Protection Act of 1940. Additional information can be found using the following links: Eagle Management https://www.fws.gov/program/eagle-management Measures for avoiding and minimizing impacts to birds https://www.fws.gov/library/collections/avoiding-and-minimizing-incidental- take-migratory-birds Nationwide avoidance and minimization measures for birds Supplemental Information for Migratory Birds and Eagles in IPaC https://www.fws.gov/media/supplemental-information-migratory- birds-and-bald-and-golden-eagles-may-occur-project-action 1 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 5/11 document, and any other project-specific avoidance and minimization measures suggested at the link Measures for avoiding and minimizing impacts to birds for the birds of concern on your list below. Ensure Your Migratory Bird List is Accurate and Complete If your project area is in a poorly surveyed area, your list may not be complete and you may need to rely on other resources to determine what species may be present (e.g. your local FWS field office, state surveys, your own surveys). Please review the Supplemental Information on Migratory Birds and Eagles document, to help you properly interpret the report for your specified location, including determining if there is sufficient data to ensure your list is accurate. For guidance on when to schedule activities or implement avoidance and minimization measures to reduce impacts to migratory birds on your list, see the "Probability of Presence Summary" below to see when these birds are most likely to be present and breeding in your project area. Review the FAQs The FAQs below provide important additional information and resources. BREEDING SEASONNAME Bald Eagle Haliaeetus leucocephalus This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities. https://ecos.fws.gov/ecp/species/1626 Breeds Mar 1 to Aug 31 Black Swift Cypseloides niger This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/8878 Breeds Jun 15 to Sep 10 Black Turnstone Arenaria melanocephala This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. Breeds elsewhere California Gull Larus californicus This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. Breeds Mar 1 to Jul 31 Chestnut-backed Chickadee Poecile rufescens rufescens This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA Breeds Mar 1 to Jul 31 Clark's Grebe Aechmophorus clarkii This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. Breeds Jun 1 to Aug 31 Evening Grosbeak Coccothraustes vespertinus This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. Breeds May 15 to Aug 10 Golden Eagle Aquila chrysaetos This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities. https://ecos.fws.gov/ecp/species/1680 Breeds Mar 1 to Aug 31 Lesser Yellowlegs Tringa flavipes This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/9679 Breeds elsewhere Marbled Godwit Limosa fedoa This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/9481 Breeds elsewhere 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 6/11 Probability of Presence Summary The graphs below provide our best understanding of when birds of concern are most likely to be present in your project area. This information can be used to tailor and schedule your project activities to avoid or minimize impacts to birds. Please make sure you read "Supplemental Information on Migratory Birds and Eagles", specifically the FAQ section titled "Proper Interpretation and Use of Your Migratory Bird Report" before using or attempting to interpret this report. Probability of Presence () Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. (A year is represented as 12 4-week months.) A taller bar indicates a higher probability of species presence. The survey effort (see below) can be used to establish a level of confidence in the presence score. One can have higher confidence in the presence score if the corresponding survey effort is also high. How is the probability of presence score calculated? The calculation is done in three steps: 1. The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25. 2. To properly present the pattern of presence across the year, the relative probability of presence is calculated. This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2. 3. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score. To see a bar's probability of presence score, simply hover your mouse cursor over the bar. Breeding Season () Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area. Survey Effort () Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. The number of surveys is expressed as a range, for example, 33 to 64 surveys. To see a bar's survey effort range, simply hover your mouse cursor over the bar. Olive-sided Flycatcher Contopus cooperi This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/3914 Breeds May 20 to Aug 31 Oregon Vesper Sparrow Pooecetes gramineus affinis This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA https://ecos.fws.gov/ecp/species/5141 Breeds Apr 21 to Aug 31 Rufous Hummingbird Selasphorus rufus This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/8002 Breeds Apr 15 to Jul 15 Short-billed Dowitcher Limnodromus griseus This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/9480 Breeds Jun 1 to Aug 10 Western Grebe aechmophorus occidentalis This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. https://ecos.fws.gov/ecp/species/6743 Breeds Jun 1 to Aug 31 Western Gull Larus occidentalis This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska. Breeds Apr 21 to Aug 25 Western Screech-owl Megascops kennicottii cardonensis This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA Breeds Mar 1 to Jun 30 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 7/11 no data survey effort breeding season probability of presence No Data () A week is marked as having no data if there were no survey events for that week. Survey Timeframe Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse. SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Bald Eagle Non-BCC Vulnerable Black Swift BCC Rangewide (CON) Black Turnstone BCC Rangewide (CON) California Gull BCC Rangewide (CON) Chestnut-backed Chickadee BCC - BCR Clark's Grebe BCC Rangewide (CON) Evening Grosbeak BCC Rangewide (CON) Golden Eagle Non-BCC Vulnerable Lesser Yellowlegs BCC Rangewide (CON) Marbled Godwit BCC Rangewide (CON) Olive-sided Flycatcher BCC Rangewide (CON) Oregon Vesper Sparrow BCC - BCR SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Rufous Hummingbird BCC Rangewide (CON) Short-billed Dowitcher BCC Rangewide (CON) Western Grebe BCC Rangewide (CON) Western Gull BCC Rangewide (CON) Western Screech-owl BCC - BCR Migratory Bird FAQs Tell me more about avoidance and minimization measures I can implement to avoid or minimize impacts to migratory birds. Nationwide Avoidance & Minimization Measures for Birds describes measures that can help avoid and minimize impacts to all birds at any location year- round. When birds may be breeding in the area, identifying the locations of any active nests and avoiding their destruction is one of the most effective ways to minimize impacts. To see when birds are most likely to occur and breed in your project area, view the Probability of Presence Summary. Additional measures or permits may be advisable depending on the type of activity you are conducting and the type of infrastructure or bird species present on your project site. What does IPaC use to generate the list of migratory birds that potentially occur in my specified location? The Migratory Bird Resource List is comprised of Birds of Conservation Concern (BCC) and other species that may warrant special attention in your project location, such as those listed under the Endangered Species Act or the Bald and Golden Eagle Protection Act and those species marked as “Vulnerable”. See the FAQ “What are the levels of concern for migratory birds?” for more information on the levels of concern covered in the IPaC migratory bird species list. The migratory bird list generated for your project is derived from data provided by the Avian Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding, and citizen science datasets and is queried and filtered to return a list of those birds reported as occurring in the 10km grid cell(s) with which your project intersects. These species have been identified as warranting special attention because they are BCC species in that area, an eagle (Bald and Golden Eagle Protection Act requirements may apply), or a species that has a particular vulnerability to offshore activities or development. 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 8/11 Again, the Migratory Bird Resource list includes only a subset of birds that may occur in your project area. It is not representative of all birds that may occur in your project area. To get a list of all birds potentially present in your project area, and to verify survey effort when no results present, please visit the Rapid Avian Information Locator (RAIL) Tool. Why are subspecies showing up on my list? Subspecies profiles are included on the list of species present in your project area because observations in the AKN for the species are being detected. If the species are present, that means that the subspecies may also be present. If a subspecies shows up on your list, you may need to rely on other resources to determine if that subspecies may be present (e.g. your local FWS field office, state surveys, your own surveys). What does IPaC use to generate the probability of presence graphs for the migratory birds potentially occurring in my specified location? The probability of presence graphs associated with your migratory bird list are based on data provided by the Avian Knowledge Network (AKN). This data is derived from a growing collection of survey, banding, and citizen science datasets. Probability of presence data is continuously being updated as new and better information becomes available. To learn more about how the probability of presence graphs are produced and how to interpret them, go to the Probability of Presence Summary and then click on the "Tell me about these graphs" link. How do I know if a bird is breeding, wintering, or migrating in my area? To see what part of a particular bird's range your project area falls within (i.e. breeding, wintering, migrating, or resident), you may query your location using the RAIL Tool and view the range maps provided for birds in your area at the bottom of the profiles provided for each bird in your results. If a bird on your IPaC migratory bird species list has a breeding season associated with it (indicated by yellow vertical bars on the phenology graph in your “IPaC PROBABILITY OF PRESENCE SUMMARY” at the top of your results list), there may be nests present at some point within the timeframe specified. If "Breeds elsewhere" is indicated, then the bird likely does not breed in your project area. What are the levels of concern for migratory birds? Migratory birds delivered through IPaC fall into the following distinct categories of concern: 1. "BCC Rangewide" birds are Birds of Conservation Concern (BCC) that are of concern throughout their range anywhere within the USA (including Hawaii, the Pacific Islands, Puerto Rico, and the Virgin Islands); 2. "BCC - BCR" birds are BCCs that are of concern only in particular Bird Conservation Regions (BCRs) in the continental USA; and 3. "Non-BCC - Vulnerable" birds are not BCC species in your project area, but appear on your list either because of the Bald and Golden Eagle Protection Act requirements (for eagles) or (for non-eagles) potential susceptibilities in offshore areas from certain types of development or activities (e.g. offshore energy development or longline fishing). Although it is important to avoid and minimize impacts to all birds, efforts should be made, in particular, to avoid and minimize impacts to the birds on this list, especially BCC species. For more information on avoidance and minimization measures you can implement to help avoid and minimize migratory bird impacts, please see the FAQ “Tell me more about avoidance and minimization measures I can implement to avoid or minimize impacts to migratory birds”. Details about birds that are potentially affected by offshore projects For additional details about the relative occurrence and abundance of both individual bird species and groups of bird species within your project area off the Atlantic Coast, please visit the Northeast Ocean Data Portal. The Portal also offers data and information about other taxa besides birds that may be helpful to you in your project review. Alternately, you may download the bird model results files underlying the portal maps through the NOAA NCCOS Integrative Statistical Modeling and Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic Outer Continental Shelf project webpage. Proper interpretation and use of your migratory bird report The migratory bird list generated is not a list of all birds in your project area, only a subset of birds of priority concern. To learn more about how your list is generated and see options for identifying what other birds may be in your project area, please see the FAQ "What does IPaC use to generate the migratory birds potentially occurring in my specified location". Please be aware this report provides the "probability of presence" of birds within the 10 km grid cell(s) that overlap your project; not your exact project footprint. On the graphs provided, please look carefully at the survey effort (indicated by the black vertical line) and for the existence of the "no data" indicator (a red horizontal line). A high survey effort is the key component. If the survey effort is high, then the probability of presence score can be viewed as more dependable. In contrast, a low survey effort bar or no data bar means a lack of data and, therefore, a lack of certainty about presence of the species. This list does not represent all birds present in your project area. It is simply a starting point for identifying what birds of concern have the potential to be in your project area, when they might be there, and if they might be breeding (which means nests might be present). The list and associated information help you know what to look for to confirm presence and helps guide implementation of avoidance and minimization measures to eliminate or reduce potential impacts from your project activities, should presence be confirmed. To learn more about avoidance and minimization measures, visit the FAQ "Tell me about avoidance and minimization measures I can implement to avoid or minimize impacts to migratory birds". Interpreting the Probability of Presence Graphs Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. A taller bar indicates a higher probability of species presence. The survey effort can be used to establish a level of confidence in the presence score. How is the probability of presence score calculated? The calculation is done in three steps: The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25. To properly present the pattern of presence across the year, the relative probability of presence is calculated. This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score. 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 9/11 Breeding Season () Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area. Survey Effort () Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. No Data () A week is marked as having no data if there were no survey events for that week. Survey Timeframe Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse. Facilities National Wildlife Refuge lands Any activity proposed on lands managed by the National Wildlife Refuge system must undergo a 'Compatibility Determination' conducted by the Refuge. Please contact the individual Refuges to discuss any questions or concerns. There are no refuge lands at this location. Fish hatcheries There are no fish hatcheries at this location. Wetlands in the National Wetlands Inventory (NWI) Impacts to NWI wetlands and other aquatic habitats may be subject to regulation under Section 404 of the Clean Water Act, or other State/Federal statutes. For more information please contact the Regulatory Program of the local U.S. Army Corps of Engineers District. Wetland information is not available at this time This can happen when the National Wetlands Inventory (NWI) map service is unavailable, or for very large projects that intersect many wetland areas. Try again, or visit the NWI map to view wetlands at this location. Data limitations The Service's objective of mapping wetlands and deepwater habitats is to produce reconnaissance level information on the location, type and size of these resources. The maps are prepared from the analysis of high altitude imagery. Wetlands are identified based on vegetation, visible hydrology and geography. A margin of error is inherent in the use of imagery; thus, detailed on-the-ground inspection of any particular site may result in revision of the wetland boundaries or classification established through image analysis. The accuracy of image interpretation depends on the quality of the imagery, the experience of the image analysts, the amount and quality of the collateral data and the amount of ground truth verification work conducted. Metadata should be consulted to determine the date of the source imagery used and any mapping problems. Wetlands or other mapped features may have changed since the date of the imagery or field work. There may be occasional differences in polygon boundaries or classifications between the information depicted on the map and the actual conditions on site. Data exclusions Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and nearshore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. Data precautions Federal, state, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, state, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 10/11 modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, state, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities. 1/15/26, 12:45 PM IPaC: Explore Location resources https://ipac.ecosphere.fws.gov/location/RHTRUQJJOJFGTIXQ74PJ4DSWB4/resources 11/11 Renton Municipal Airport | ATCT Siting Study Report 58 Appendix F. Project Cost Estimate Air Traffic Control Tower Siting Study Rough Order of Magnitude Estimate Report Date: June 2, 2026 Revision Date: July 10, 2026 Revision No.: Revision No. 2 Revision Date: Revision Date Revision No.: 1 Renton Municipal Airport Renton, WA Prepared for: Kimley-Horn 1201 Third Avenue, Suite 2800 Seattle, WA 98101 2594 N. Mount Juliet Road Mount Juliet, TN 37122 (615) 994-1980 July 10, 2026 David Williams, P.E. Kimley-Horn 1201 Third Avenue, Suite 2800 Seattle, WA 98101 RE: Air Traffic Control Tower Siting Study Renton Municipal Airport Renton, WA Rough Order of Magnitude Estimate - Revision No. 2 – July 10, 2026 David: We are pleased to present the revised Rough Order of Magnitude Estimate for the referenced project. The Estimate has been drawn from the information noted in Exhibit A. Included within the report are our Estimate Notes, which outline the criteria and allowances that were used to produce the estimate. We appreciate the opportunity to work with you on this project. Should you have any questions or need additional information, please contact us at your convenience. Sincerely, The Connico Team Jeffrey R. Bowman, CPE Senior Cost Specialist jrbowman@connico.com Connico File No. 6665.25 Section 1 Introduction Task Outline Project Description Market Information Disclaimer Section 2 Estimate Notes Section 3 Estimate Summary ROM Estimate Section 4 Exhibits A - Document List B - Quality Control Exhibit Table of Contents Connico 6665.25 RNT ATCT Est 2026-07-10 Page 3 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 INTRODUCTION TASK OUTLINE Kimley-Horn retained Connico as cost consultants to provide an estimate of probable cost for the Air Traffic Control Tower Siting Study project at Renton Municipal Airport in Renton, WA. The estimate was based on conceptual plans and other information, as noted in Exhibit A of this report. In providing estimates of probable construction cost, the client understands that Connico has no control over the cost or availability of labor, equipment, or materials, or over market conditions or the contractor's method of pricing, and that Connico’s estimates of probable construction costs are made based on Connico’s professional judgment and experience. Connico makes no warranty, express or implied, that the bids or the negotiated cost of the work will not vary from Connico’s estimate of probable construction cost. The estimate of probable cost has been prepared based on information prepared/provided by others. Connico has not verified the accuracy and/or completeness of this information and shall not be responsible for any errors or omissions that may be incorporated because of erroneous information provided by others. PROJECT DESCRIPTION The project scope consists of a new six-level Air Traffic Control Tower (ATCT) at Renton Municipal Airport (RNT). An optional base building for the tower has also been estimated as part of this effort for budget considerations. At this time, a base building is not part of the ATCT project. The preferred site location is site 1C. MARKET INFORMATION The United States commercial construction market has experienced a notable slowdown along with some segments contracting in comparison to recent years. Contractor confidence has shown signs of decline. Contractor backlog is slightly lower, and some projects have been put on hold or canceled due to uncertainty regarding tariffs, immigration and a tightening in lending requirements. Construction projects continue to experience significant shortages of skilled labor and increases in construction material prices. Policy changes regarding tariffs and immigrant labor have exacerbated these issues. It does not appear that these factors will be alleviated in the near term, especially when coupled with inflationary pressures. It is anticipated that contractors will seek to negotiate material cost escalation clauses into their contracts or inflate bid day pricing to mitigate some of these risks. Consequently, the culmination of these factors has resulted in both bid day pricing inconsistencies as well as adding uncertainty to construction schedules. It is recommended that Owners consider adding an escalation / tariff allowance to their budgeted project costs to help mitigate these market uncertainties. Connico 6665.25 RNT ATCT Est 2026-07-10 Page 4 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 The estimate attempts to incorporate known impacts due to market conditions, material pricing and labor impacts existing in the current market. However, the estimate cannot, and does not, reflect all potential economic impacts that may affect the construction market, cost of the work. The bidding and construction environment is in active flux as we continue to face uncertainty. Construction costs or durations may be impacted by any of these conditions. DISCLAIMER Any modification, duplication, or use of this document without the express written consent of Connico is prohibited and Connico assumes no responsibility for any such unauthorized use, duplication, or modification of this document. Kimley-Horn acknowledges that all deliverables, reports, analyses, and documents provided by Connico are proprietary and confidential. Client agrees that Deliverables shall not be used, in whole or in part, as input, training data, prompt content, or analytical source material for any artificial intelligence system, large language model, machine learning platform, or automated analysis tool, whether proprietary or third-party, without prior express written consent. Kimley-Horn shall take reasonable steps to ensure that its employees, contractors, agents, and affiliates comply with this restriction. In the event of a breach, Client agrees to promptly notify Connico and cooperate in assessing the scope of unauthorized use. Connico reserves the right to pursue all available legal and equitable remedies in connection with any violation of this provision. Connico 6665.25 RNT ATCT Est 2026-07-10 Page 5 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 ESTIMATE NOTES GENERAL Connico did not perform a site observation in preparing this estimate. The estimate is costed on the understanding that there will be free and open competition at all levels of contracting, that there will not be a restricted bidders list either for general or trade contractors, that there will be a minimum three general contract bidders and at minimum three sub bids will be available for each trade involved. The owner can facilitate these conditions by ensuring that the project is publicly advertised for bids in general circulation as well as trade publications where advertisements for bid are regularly posted, that prequalification requirements, if prequalification of either general or sub bidders is contemplated, are not unduly restrictive, and by maintaining good industry relations. The estimate is costed on the understanding that there will be a requirement to utilize “prevailing wages” on the project. The Rough Order of Magnitude Estimate has been developed using “cost per square foot” models based on other similar projects. MARKUPS AND SOFT COSTS The following “direct” markups on the cost of work are included in the estimate, based on traditional design, bid, build: General Contractor Markups Project Logistics / Phasing & Labor Factor 0.0% General Requirements & Temporary Construction 3.0% General Conditions 12.0% General Contractor’s Overhead & Profit 5.0% Insurance 2.0% Payment & Performance Bonds 1.0% Sustainability Requirements 0.0% General Contractor markups are calculated on a cascading basis, where each markup is applied to the cumulative total of all previous markups. A project logistics and labor factor allowance has not been included in the estimate to account for inefficiencies (i.e., remote staging, security, busing, etc.) associated with working at the airport. An allowance for insurance (General Liability & Worker’s Compensation) is included in the estimate. There are many variables that will impact the cost of insurance including, but not limited to, the contractor’s performance history, project size, complexity, location, and phasing. Additionally, Connico 6665.25 RNT ATCT Est 2026-07-10 Page 6 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 insurance costs will change if the owner selects an owner- or contractor-controlled insurance program. An allowance for payment and performance bonds is included in the estimate. There are many variables that will impact the cost of payment and performance bonds including, but not limited to, the contractor’s performance history, project size, complexity, location, and phasing. The estimate does not include a line item for an independent testing agency to provide field and lab testing of construction materials and to provide construction inspections. The estimate excludes professional fees and testing and inspection fees. Also excluded are design/build fees, construction management fees, building permit and fees, overtime and after hours’ work. The estimate does not include any allowance for fees normally attributed to the owner such as real estate fees, impact fees, or tap fees, etc. The estimate does not include an owner’s construction / project contingency to be utilized for changes or additions to the scope of work during construction. A twenty percent (20%) estimating design evolution has been included in the estimate for unforeseen work and final detailing that may be necessary to accomplish the project scope of work. The design evolution is not intended to be used for additions to the general scope of work. The estimate is based on commodity and labor pricing as of the date of this estimate with an allowance for escalation to bid day in 3rd quarter 2029. ESTIMATE DETAIL NOTES Temporary site storage and parking for contractors is assumed to be within the vicinity of the site. Allowances included in the estimate are amounts the owner should expect to spend. The estimate does not include the decommissioning of the existing air traffic control tower or its facilities. The estimate does not include any aviation, navigational and communication equipment costs. Connico 6665.25 RNT ATCT Est 2026-07-10 Page 7 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 ESTIMATE SUMMARY Connico 6665.25 RNT ATCT Est 2026-07-10 Page 8 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA PROJECT COMPONENTS TOTAL AIR TRAFFIC CONTROL TOWER 11,841,391$ SITEWORK 3,609,962$ Opinion of Probable Construction Cost 15,451,353$ ADD ALTERNATE BASE BUILDING 2,866,353$ The following markups are included in the project costs: General Contractors Markups 24.8% Project Logistics / Phasing & Labor Factor 0.0% General Requirements & Temporary Construction 3.0% General Conditions 12.0% General Contractor's Overhead & Profit 5.0% Insurance 2.0% Payment & Performance Bonds 1.0% Sustainability Requirements 0.0% Estimating Design Evolution 20.0% Escalation Allowance (3rd Qtr. 2029)14.0% Owner's Soft Costs 0.0% AIR TRAFFIC CONTROL TOWER SITING STUDY SUMMARY Any modification, duplication, or use of this document without the express written consent of Connico is prohibited and Connico assumes no responsibility for any such unauthorized use, duplication, or modification of this document. Connico 6665.25 RNT ATCT Est 2026-07-10 Page 9 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 ROUGH ORDER OF MAGNITUDE ESTIMATES Connico 6665.25 RNT ATCT Est 2026-07-10 Page 10 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 AIR TRAFFIC CONTROL TOWER Connico 6665.25 RNT ATCT Est 2026-07-10 Page 11 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA CONSTRUCTION SYSTEM COST PER SQUARE FOOT TOTAL A Substructure 138.37$ 616,589$ Standard Foundations 248,143$ Special Foundations 330,000$ Slab on Grade 38,446$ B Shell 666.86$ 2,971,509$ Superstructure 1,555,012$ Exterior Closure 1,360,000$ Roofing 56,497$ C Interiors 138.00$ 614,938$ Interior Construction 308,757$ Stairs 197,175$ Interior Finishes 109,007$ D Services 590.43$ 2,630,966$ Conveying 305,000$ Baggage Handling System -$ Plumbing 196,545$ HVAC 359,303$ Fire Protection 262,497$ Electrical 992,292$ Communications 217,592$ Electronic Safety & Security 297,737$ E Equipment & Furnishings 23.04$ 102,660$ Equipment 5,850$ Passenger Boarding Bridges -$ Furnishings 96,810$ F Special Construction & Demolition -$ -$ Hazardous Material Abatement -$ Subtotal 1,556.70$ 6,936,662$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 208,100$ 12.0%General Conditions 857,371$ 5.0%General Contractor's Overhead & Profit 400,107$ 2.0%Insurance 168,045$ 1.0%Payment & Performance Bonds 85,703$ 0.0%Sustainability Requirements -$ AIR TRAFFIC CONTROL TOWER SUMMARY Connico 6665.25 RNT ATCT Est 2026-07-10 Page 12 of 42 CONSTRUCTION SYSTEM COST PER SQUARE FOOT TOTAL AIR TRAFFIC CONTROL TOWER SUMMARY Subtotal - Cost of Work 1,942.55$ 8,655,987$ 20.0%Estimating Design Evolution 1,731,197$ 14.0%Escalation Allowance (3rd Qtr. 2029)1,454,206$ Opinion of Probable Construction Cost 2,657.40$ 11,841,391$ 0.0%Owner's Soft Costs -$ Opinion of Probable Project Cost 2,657.40$ 11,841,391$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 13 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA DESCRIPTION QUANTITY UNIT UNIT COST TOTAL New ATCT Construction (Area Measured Over Openings) Level 01 780 sf Stairs 233 sf Elevator 102 sf Lobby 217 sf Telco/Electrical 163 sf Fire Pump 65 sf Level 02 769 sf Stairs 191 sf Elevator 102 sf Lobby 80 sf FAA Equipment 396 sf Level 03 769 sf Stairs 191 sf Elevator 102 sf Lobby 80 sf Elevator Equipment 45 sf Tower Manager Office 351 sf Level 04 769 sf Stairs 191 sf Elevator 102 sf Lobby 80 sf Airport Equipment 396 sf Level 05 769 sf Stairs 191 sf Elevator 102 sf Lobby 80 sf ADA Restroom 45 sf Breakroom 351 sf Level 06 600 sf Cab Floor 600 sf Total Area 4,456 sf 4,456 sf ATCT (72'-1" vlf) AIR TRAFFIC CONTROL TOWER DETAIL AREA ANALYSIS Connico 6665.25 RNT ATCT Est 2026-07-10 Page 14 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL A SUBSTRUCTURE A10 Foundations A1010 Standard Foundations A1011 Stem Wall- 1'-0"x 5'-0" (Allowance)45 lf 223.00$ 10,035$ A1012 Stem Wall- 2'-6"x 5'-0" (Allowance)100 lf 487.00$ 48,700$ A1013 Mat Foundation A1014 Excavation 940 cy 17.50$ 16,447$ A1015 Mat Foundation, 38'-4" x 42'-6" x 3'-0" 181 cy 700.00$ 126,712$ A1016 Granular Fill 272 cy 75.00$ 20,364$ A1017 Backfill and Compact 487 cy 15.00$ 7,309$ A1018 Disposal of Surplus Excavated Material 453 cy 30.00$ 13,576$ A1019 Dewatering (Allowance)1 ls 5,000.00$ 5,000$ A1020 Structural Fill below Slab on Grade Excluded A1030 Special Foundations A1031 Drilled Piers (60'-0 depth, Pulled Casings) A1032 Pile Mobilization / Demobilization 1 ls 30,000.00$ 30,000$ A1033 Load Test 1 ls 16,200.00$ 16,200$ A1034 36" Dia Pier (16 ea.- 60'-0" avg., Allowance) 960 vlf 280.00$ 268,800$ A1035 Dewatering (Allowance)1 alw 15,000.00$ 15,000$ A1050 Slab on Grade A1051 Granular Fill In Above A1052 6" Slab on Grade 780 sf 14.50$ 11,310$ A1053 Turndown- 1'-6"x 1'-6"112 lf 28.00$ 3,136$ A1054 Elevator Pit (Wall, Waterproofing & Sump Pit)1 ea 17,500.00$ 17,500$ A1055 Misc. Trenches, Pits & Bases 1 ls 1,500.00$ 1,500$ A1056 Equipment / Housekeeping Pad 1 ls 5,000.00$ 5,000$ Subtotal - Substructure 616,589$ B SHELL B10 Superstructure B1010 Floor Construction (Includes Balcony & Walkway) B1011 Steel Floor Structure 72 tns 13,400.00$ 964,800$ B1012 1-1/2" Steel Floor Decking, 22 ga 3,350 sf 12.25$ 41,038$ B1013 3-1/2" Concrete Fill to Metal Floor Deck 3,350 sf 22.75$ 76,213$ B1014 Miscellaneous Steel (10%)7 tns 13,400.00$ 96,480$ B1015 Balcony & Walkway Topping Slab 872 sf 15.50$ 13,516$ B1016 Floor Fireproofing (Columns + Beams)3,350 sf 6.50$ 21,775$ B1017 Crane - 130 tn. Crawler (Allowance)6 mth 30,000.00$ 180,000$ B1018 Blast Protection Excluded Connico 6665.25 RNT ATCT Est 2026-07-10 Page 15 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL B1080 Roof Construction B1051 Steel Roof Structure 9 tns 13,400.00$ 120,600$ B1052 Roof Decking 735 sf 12.25$ 9,004$ B1053 3-1/2" Concrete Fill to Metal Roof Deck Not Indicated B1054 Miscellaneous Steel (10%)0.90 tns 13,400.00$ 12,060$ B1055 Roof Fireproofing (Columns + Beams)735 sf 6.50$ 4,778$ B1056 Intumescent Paint (Cab Columns & Beams)1 ls 10,500.00$ 10,500$ B1057 Beacon Support Base 1 ls 4,250.00$ 4,250$ B1058 Blast Protection of ATCT Structure Excluded B20 Exterior Closure B2010 Exterior Walls B2011 Insulated Metal Panel 6,744 sf 65.00$ 438,360$ B2012 Back-up System to Metal Panel 6,744 sf 31.88$ 214,965$ B2013 Railing at Balcony & Catwalk 166 lf 300.00$ 49,800$ B2014 Railing at Roof Perimeter Not Required B2030 Exterior Windows B2031 Cab Glass 730 sf 475.00$ 346,750$ B2032 Storefront 1,160 sf 145.00$ 168,200$ B2050 Exterior Doors B2051 HM Door, Frame & HW - Single 3 ea 2,850.00$ 8,550$ B2052 HM Door, Frame & HW - Double 1 ea 4,725.00$ 4,725$ B2053 Glass Door, Frame & Hardware - Single 1 ea 5,000.00$ 5,000$ B2054 HM Door, Frame & Hardware - Single - Access Door 1 ea 1,250.00$ 1,250$ B2070 Exterior Soffits B2071 Composite Metal Panel Soffit at Balcony & Walkway 870 sf 80.00$ 69,600$ B2072 Back-up System to Composite Metal Panel Soffit at Balcony & Walkway 870 sf 40.00$ 34,800$ B2090 Exterior Signage B2091 Building Signage- Airport Code (Allowance)4 alw 4,500.00$ 18,000$ B30 Roofing B3010 Roof Coverings B3011 TPO Roof Membrane, Cover Board and Rigid Insulation 735 sf 50.00$ 36,750$ B3012 Pre-Finished Coping w/ FRT Blocking 166 lf 60.00$ 9,960$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 16 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL B3013 Walkway Pads (Allowance)166 sf 7.75$ 1,287$ B3014 Fall Protection Anchors Not Indicated B3030 Roof Openings B3031 Skylight Not Indicated B3032 Roof Hatch with 3 Sided Handrail and Swing Gate at Roof 1 ea 8,500.00$ 8,500$ Subtotal - Shell 2,971,509$ C INTERIORS C10 Interior Construction C1010 Partitions C1011 CMU Partition 5,270 sf 22.00$ 115,940$ C1012 GWB Partitions - GWB os 3,510 sf 19.05$ 66,866$ C1013 GWB Partitions - GWB bs 450 sf 21.38$ 9,619$ C1014 Rough Carpentry & Blocking 4,456 sf 1.50$ 6,684$ C1015 Caulking, Sealants & Firestopping 4,456 sf 1.75$ 7,798$ C1016 Misc. Metals, Bracing, Countertop Supports, Equipment Supports etc. 4,456 sf 0.50$ 2,228$ C1030 Interior Doors C1031 HM Door, Frame & HW - Single 14 ea 2,600.00$ 36,400$ C1032 Access Door 8 ea 350.00$ 2,800$ C1033 Smoke Curtain 5 ea 10,000.00$ 50,000$ C1050 Specialties C1051 Fire Extinguishers 4,456 sf 0.75$ 3,342$ C1052 Code Signage 4,456 sf 0.15$ 668$ C1053 Interior Wayfinding Signage 4,456 sf 0.50$ 2,228$ C1054 36" Grab Bar 1 ea 115.00$ 115$ C1055 42" Grab Bar 1 ea 115.00$ 115$ C1056 18" Grab Bar 1 ea 95.00$ 95$ C1057 Toilet Paper Dispenser 1 ea 125.00$ 125$ C1058 Mirror - 24" x 36"1 ea 195.00$ 195$ C1059 Paper Tower Dispenser & Trash Disposal 1 ea 725.00$ 725$ C1060 Sanitary Napkin Disposal 1 ea 115.00$ 115$ C1061 Seat Cover Dispenser 1 ea 195.00$ 195$ C1062 Wall Hung Soap Dispenser 1 ea 195.00$ 195$ C1063 Towel Hook 1 ea 45.00$ 45$ C1064 Kitchen / Breakroom Accessories 1 ls 500.00$ 500$ C1065 Elevator Pit Ladder 1 ea 650.00$ 650$ C1066 Lockers Not Indicated C1067 Solid Surface Window Sill Not Indicated C1068 Miscellaneous Specialties 4,456 sf 0.25$ 1,114$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 17 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL C20 Stairs C2010 Stair Construction C2011 Steel Stair C2012 Steel Pan Stair, Concrete Infill Steps 5 flts 27,500.00$ 137,500$ C2013 Stair Double Handrail / Guardrail 5 flts 3,000.00$ 15,000$ C2014 2 1/4" Stair Railing Fixed to Walls 5 flts 1,150.00$ 5,750$ C2030 Stair Finishes C2031 Stair Tread & Landing Finishes 5 flts 6,280.00$ 31,400$ C2032 Stair Handrail & Balustrade Finishes 5 flts 1,035.00$ 5,175$ C2033 Rubber Treads & Landings 1 flts 2,350.00$ 2,350$ C30 Interior Finishes C3010 Interior Finishes C3011 Floor Finishes C3012 Carpet - Public 710 sf 7.00$ 4,970$ C3013 Static Dissipative Tile 150 sf 9.00$ 1,350$ C3014 Concrete Sealer 710 sf 3.15$ 2,237$ C3015 Floor Tile 325 sf 24.00$ 7,800$ C3016 Laminate Flooring 470 sf 12.50$ 5,875$ C3017 Access Floor 600 sf 40.00$ 24,000$ C3018 Base Finishes C3019 Rubber 685 lf 4.50$ 3,083$ C3020 Tile Base 110 lf 22.00$ 2,420$ C3021 Wall Finishes C3022 Paint GWB 6,560 sf 2.00$ 13,120$ C3023 Paint CMU 3,660 sf 2.50$ 9,150$ C3024 Ceiling Finishes C3025 ACT 1,700 sf 12.50$ 21,250$ C3026 GWB 400 sf 20.50$ 8,200$ C3027 GWB Bulkheads 90 sf 22.50$ 2,025$ C3028 Paint Exposed 600 sf 3.15$ 1,890$ C3029 Paint GWB 400 sf 3.25$ 1,300$ C3030 Paint GWB Bulkheads 90 sf 3.75$ 338$ Subtotal - Interiors 614,938$ D SERVICES D10 Conveying System D1010 Elevators & Lifts D1011 Machine-Room-Less Elevator 5 stp 55,000.00$ 275,000$ D1012 Elevator Cab Finish (Allowance)1 ls 30,000.00$ 30,000$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 18 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL D20 Plumbing D2010 Plumbing Systems D2011 Plumbing Fixtures D2012 Water Closets (WC-1); Wall Mtd, Sensor Flush Valve incl. Rough-in 1 ea 2,750.00$ 2,750$ D2013 Lavatories (LV-1); Counter Mtd, Sensor Faucet, incl. Carrier & Rough-in 1 ea 2,460.00$ 2,460$ D2014 Breakroom/Cab Sink (SK-1); SS Counter Mtd. w/ Faucet incl. Rough-in 2 ea 1,875.00$ 3,750$ D2015 Mop Sink (MS-1); Floor Mtd. w/ Faucet, Hose and Accessories 1 ea 3,240.00$ 3,240$ D2016 Electric Water Cooler (EWC-1); Dual Height, Bottle Filler Incl. Rough in 1 ea 6,540.00$ 6,540$ D2017 Plumbing Equipment D2018 Electric Water Heater (EWH-1); Instantaneous, Tankless 1 ea 1,350.00$ 1,350$ D2019 Elevator Sump Pump (SP-1); 50 gpm incl. Panel and Accessories 1 ea 3,895.00$ 3,895$ D2020 Roof Drain (RD-1&2); 15" CI incl. Rough-in 6 ea 1,180.00$ 7,080$ D2021 Water Dispenser Connection (IMB)1 ea 365.00$ 365$ D2022 Hose Bibb (HB-1)1 ea 320.00$ 320$ D2023 Wall Hydrant (NFWH); Non-Freeze 1 ea 545.00$ 545$ D2024 Plumbing Equipment & Accessories Not Currently Shown 4,456 sf 2.55$ 11,363$ D2025 Domestic Water Piping D2026 Domestic Water Pipe, Insulation, Fittings, BFP, Valves, WH Arrestors & Accessories 4,456 sf 8.75$ 38,990$ D2027 Sanitary Waste & Vent D2028 4" Sanitary Entrance UG to 5' Outside Bldg.1 ea 3,500.00$ 3,500$ D2029 Sanitary Waste & Vent Pipe, Fittings, Supports & Accessories 4,456 sf 8.25$ 36,762$ D2030 Stormwater Piping D2031 Stormwater Entrance UG to 5' Outside 1 ea 2,250.00$ 2,250$ D2032 Stormwater Pipe, Fittings & Accessories 4,456 sf 4.75$ 21,166$ D2033 Condensate Drain Piping D2034 Condensate Drain Piping, Insulation & Accessories 4,456 sf 3.50$ 15,596$ D2035 Natural Gas Piping D2036 Natural Gas Piping and Accessories 4,456 sf 1.75$ 7,798$ D2037 Miscellaneous Plumbing D2038 Plumbing General Conditions 4,456 sf 3.27$ 14,571$ D2039 Disinfect, Start-up & Commissioning 4,456 sf 0.62$ 2,763$ D2040 Seismic Bracing, Firestop, BIM, etc.4,456 sf 0.95$ 4,233$ D2041 Engineering, Shop Drawings, As-Builts 4,456 sf 1.18$ 5,258$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 19 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL D30 HVAC D3010 HVAC Systems D3011 HVAC Equipment D3012 VRF Rooftop Condensing Units 2 ea 36,400.00$ 72,800$ D3013 CRAC Units 2 ea 30,000.00$ 60,000$ D3014 Ceiling Cassettes 4 ea 3,800.00$ 15,200$ D3015 PTAC Units 4 ea 6,000.00$ 24,000$ D3016 Exhaust Fans (EF)4 ea 2,800.00$ 11,200$ D3017 HVAC Equipment & Accessories Not Currently Shown 4,456 sf 4.50$ 20,052$ D3018 HVAC Refrigerant Piping D3019 Refrigerant Pipe, Fittings, Supports, Valves and Accessories 4,456 sf 3.75$ 16,710$ D3020 Air Distribution D3021 Stairwell Pressurization Fan (SF-1)1 ea 12,500.00$ 12,500$ D3022 Allowance for Louvers 1 ls 7,500.00$ 7,500$ D3023 Air Distribution Accessories; Flex Ducts, Fire Dampers, MVDs, Sealants, etc. 4,456 sf 3.15$ 14,036$ D3024 Miscellaneous HVAC D3025 HVAC General Conditions 4,456 sf 5.97$ 26,611$ D3026 Hoisting & Rigging 4,456 sf 1.55$ 6,907$ D3027 Seismic Bracing, Firestop, BIM, etc.4,456 sf 2.15$ 9,580$ D3028 Coordination, Engineering, Submittals & Shop Drawings 4,456 sf 0.96$ 4,278$ D3110 DDC Controls and Instrumentation D3111 DDC Controls and Instrumentation 4,456 sf 10.50$ 46,788$ D3210 Testing, Balancing & Commissioning D3211 System Testing, Balancing & Warranty 4,456 sf 2.50$ 11,140$ D40 Fire Protection D4010 Sprinkler Systems D4011 Fire Suppression System D4012 6" Water Service Entrance; SS 1 ea 7,500.00$ 7,500$ D4013 6" Backflow Preventer; Double Detector 1 ea 15,625.00$ 15,625$ D4014 Exterior Post Indicator Valve; 6"1 ea 3,850.00$ 3,850$ D4015 Fire Department Connection; 6'' Storz 1 ea 5,260.00$ 5,260$ D4016 Fire Pump Assembly (FP); 500 gpm, incl. Jockey Pump and Controllers 1 ea 125,000.00$ 125,000$ D4017 Fire Pump Test Header; 2 1/2''1 ea 3,140.00$ 3,140$ D4018 Fire Hose Valves 6 ea 942.00$ 5,652$ D4019 Riser Control Valves; Wet Pipe, Incl. Alarm Valve, Flow & Tamper Switches, etc. 1 ea 7,840.00$ 7,840$ D4020 Automatic Wet Pipe Sprinkler System; FW Mains, Branch Piping, Sprinkler Heads, 4,456 sf 10.75$ 47,902$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 20 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL D4021 Miscellaneous Fire Protection D4022 General Conditions 4,456 sf 4.36$ 19,428$ D4023 Engineering & Design, Submittals, Shop and As-Built Drawings 4,456 sf 0.96$ 4,278$ D4024 Cleaning, Testing and Start-up 4,456 sf 1.35$ 6,016$ D4025 Seismic Restraints 4,456 sf 0.82$ 3,654$ D4026 Hoisting and Rigging 4,456 sf 1.65$ 7,352$ D50 Electrical D5010 Electrical Systems D5011 Switchgear D5012 50A Panelboard 2 ea 4,587.00$ 9,174$ D5013 100A Panelboard 2 ea 5,510.00$ 11,020$ D5014 200A Panelboard 1 ea 7,589.00$ 7,589$ D5015 400A Distribution Panel 1 ea 21,330.00$ 21,330$ D5016 45KVA Transformer 2 ea 21,000.00$ 42,000$ D5017 UPS 100A MBP 1 ea 12,500.00$ 12,500$ D5018 100A ATS 1 ea 15,998.37$ 15,998$ D5019 400A ATS 1 ea 19,189.00$ 19,189$ D5020 60KVA UPS 1 ea 86,612.00$ 86,612$ D5021 Feeders 4,456 sf 33.50$ 149,276$ D5022 Equipment Power and Connection 4,456 sf 20.00$ 89,120.00$ D5023 Wiring Devices 4,456 sf 22.55$ 100,483$ D5024 Branch Wiring 4,456 sf 12.25$ 54,586$ D5025 Lighting D5026 Lighting 4,456 sf 37.00$ 164,872.00$ D5027 Lighting Controls 1 ls 42,555.00$ 42,555.00$ D5028 Grounding and Lightning Protection D5029 Grounding 4,456 sf 23.00$ 102,488$ D5030 Misc. Tower Equip D5031 Console Mounted Airfield Lighting Control Panel 1 alw 15,500.00$ 15,500$ D5032 Tower Airfield Lighting Control Interface Panel 1 alw 15,500.00$ 15,500$ D5033 L-821 Control Panel Programming 1 ea 10,000.00$ 10,000$ D5034 Rotating Beacon 1 ea 22,500.00$ 22,500$ D60 Communications D6010 Communications D6011 Communications 4,456 sf 32.00$ 142,592$ D6012 ALCMS System Raceway & Cable 1 alw 75,000.00$ 75,000$ D70 Electronic Safety & Security D7010 Electronic Safety & Security D7011 Video Surveillance System 4,456 sf 12.57$ 77,582$ D7012 Security Access Control 4,456 sf 5.67$ 34,995$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 21 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL D7013 Fire Alarm 4,456 sf 30.00$ 185,160$ Subtotal - Services 2,630,966$ E EQUIPMENT & FURNISHINGS E10 Equipment E1010 Equipment E1011 Breakroom / Kitchen Equipment E1012 Refrigerator, Under Counter 1 ea 750.00$ 750$ E1013 Refrigerator, Full Size 1 ea 2,800.00$ 2,800$ E1014 Microwave 2 ea 500.00$ 1,000$ E1015 Coffee Maker 2 ea 650.00$ 1,300$ E1016 Range (ADA)Not Indicated E1017 Dishwasher (ADA)Not Indicated E1018 Disposal Not Indicated E1019 TV Not Indicated E1020 Shelving Not Indicated E20 Furnishings E2010 Fixed Furnishings E2011 Base Cabinets - Breakroom 9 lf 550.00$ 4,950$ E2012 Wall Cabinets - Breakroom 13 lf 400.00$ 5,000$ E2013 Base Cabinets - Cab 10 lf 850.00$ 8,500$ E2014 Controller Cabinets/Console 47 lf 1,250.00$ 58,750$ E2015 Misc. Casework Allowance 4,456 sf 1.25$ 5,570$ E2030 Window Treatment E2031 Horizontal Louver Blinds (Cab Glass) Not Required E2032 Transparent Plastic Window Shades (Cab Glass) By Others E2033 Window Shades (Storefront)1,160 sf 6.50$ 7,540$ E2050 Loose Furnishings E2051 Movable Furnishings (Owner Furnished / Contractor Installed) 1 alw 6,500.00$ 6,500$ Subtotal - Equipment & Furnishings 102,660$ F SPECIAL CONSTRUCTION & DEMOLITION F30 Hazardous Material Abatement F3010 Hazardous Material Abatement F3011 Hazardous Material Abatement Excluded Subtotal - Special Construction & Demolition -$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 22 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL AIR TRAFFIC CONTROL TOWER DETAIL Subtotal 1,556.70$ 6,936,662$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 208,100$ 12.0%General Conditions 857,371$ 5.0%General Contractor's Overhead & Profit 400,107$ 2.0%Insurance 168,045$ 1.0%Payment & Performance Bonds 85,703$ 0.0%Sustainability Requirements -$ Subtotal - Cost of Work 1,942.55$ 8,655,987$ 20.0%Estimating Design Evolution 1,731,197$ 14.0%Escalation Allowance (3rd Qtr. 2029)1,454,206$ Opinion of Probable Construction Cost 2,657.40$ 11,841,391$ 0.0%Owner's Soft Costs -$ Opinion of Probable Project Cost 2,657.40$ 11,841,391$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 23 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 SITEWORK Connico 6665.25 RNT ATCT Est 2026-07-10 Page 24 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA CONSTRUCTION SYSTEM TOTAL G Building Sitework 2,114,708$ Site Mobilization 126,000$ Site Preparation 396,000$ Site Improvements 407,990$ Site Mechanical Utilities 183,500$ Site Electrical Utilities 1,001,218$ Subtotal 2,114,708$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 63,441$ 12.0%General Conditions 261,378$ 5.0%General Contractor's Overhead & Profit 121,976$ 2.0%Insurance 51,230$ 1.0%Payment & Performance Bonds 26,127$ 0.0%Sustainability Requirements -$ Subtotal - Cost of Work 2,638,861$ 20.0%Estimating Design Evolution 527,772$ 14.0%Escalation Allowance (3rd Qtr. 2029)443,329$ Opinion of Probable Construction Cost 3,609,962$ 0.0%Owner's Soft Costs -$ Opinion of Probable Project Cost 3,609,962$ SITEWORK SUMMARY Connico 6665.25 RNT ATCT Est 2026-07-10 Page 25 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA DESCRIPTION QUANTITY UNIT UNIT COST TOTAL G BUILDING SITEWORK G05 Site Mobilization G0510 Site Mobilization G0511 Mobilization 1 ls 101,000.00$ 101,000$ G0512 Erosion & Sediment Control Allowance 1 alw 16,000.00$ 16,000$ G0513 Maintenance of Traffic (Work along Perimeter Road) 1 alw 9,000.00$ 9,000$ G10 Site Preparation G1010 Site Clearing G1011 Building Pad Prep & Rough Site Grading 1 ls 50,000.00$ 50,000$ G1012 Tree Removal 2 ea 1,000.00$ 2,000$ G1020 Site Demolition and Relocation G1021 Full Depth Asphalt Pavement Removal 1,850 sy 25.00$ 46,250$ G1022 Existing ATCT Demolition (No Abatement)1,700 sf 75.00$ 127,500$ G1023 Existing ATCT Demolition (Abatement Allowance) 1 ls 150,000.00$ 150,000$ G1024 Existing AOA Fence Removal 400 lf 25.00$ 10,000$ G1025 Existing AOA Gate Removal 1 ea 3,500.00$ 3,500$ G1026 Curb and Gutter Removal 450 lf 15.00$ 6,750$ G20 Site Improvements G2010 Asphalt Paving G2011 Compacted Subgrade 1,800 sy 10.00$ 18,000$ G2012 8" Aggregate Base Course 912 tons 60.00$ 54,720$ G2013 3" Hot-Mix Asphalt Base Course 310 tons 300.00$ 93,000$ G2014 2" Hot-Mix Asphalt Surface Course 210 tons 250.00$ 52,500$ G2015 Emulsified Tack Coat 720 gals 6.50$ 4,680$ G2040 Site Development G2041 AOA Perimeter Security Fence 400 lf 135.00$ 54,000$ G2042 AOA Security Gate 1 ea 20,000.00$ 20,000$ G2043 Concrete Sidewalk 84 sy 110.00$ 9,240$ G2044 Concrete Curb and Gutter 300 lf 40.00$ 12,000$ G2045 Pavement Markings 600 sf 5.00$ 3,000$ G2046 Parking Lot Signage Allowance 1 alw 5,000.00$ 5,000$ SITEWORK DETAIL Connico 6665.25 RNT ATCT Est 2026-07-10 Page 26 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL SITEWORK DETAIL G2047 Wheel Stops 11 ea 350.00$ 3,850$ G2048 Dumpster Enclosure 1 ls 20,000.00$ 20,000$ G2049 Install & Remove Temporary AOA Fence (Post in Ground) 400 lf 100.00$ 40,000$ G2080 Landscaping G2081 Landscaping & Irrigation Allowance 1 alw 18,000.00$ 18,000$ G30 Site Mechanical Utilities G3010 Site Mechanical Utilities G3011 Sanitary Sewer G3012 New Sanitary Main 30 lf 300.00$ 9,000$ G3013 Connect to Existing Sanitary Main 1 ea 7,500.00$ 7,500$ G3014 Domestic Water G3015 New Water Main 60 lf 375.00$ 22,500$ G3016 Connect to Existing Water Main 1 ea 10,000.00$ 10,000$ G3017 Site Mechanical Allowance 1 alw 50,000.00$ 50,000$ G3018 Natural Gas Allowance 1 alw 25,000.00$ 25,000$ G3019 Storm Water G3020 Storm Drainage Pipe, 24" RCP CLS V 100 ft 300.00$ 30,000$ G3021 Storm Drainage Structures Allowance 1 alw 22,000.00$ 22,000$ G3022 Existing Drainage Structure Adjustment Allowance 1 alw 7,500.00$ 7,500$ G40 Site Electrical Utilities G4010 Site Electrical Utilities G4011 Gate Operator 1 ea 15,000.00$ 15,000$ G4012 Vehicle Gate Keypad 1 ea 8,750.00$ 8,750$ G4013 3/4"C PVC W/3#12AWG Gate Pwr.250 lf 27.25$ 6,813$ G4014 3/4"C PVC W/3#14AWG Gate Controls 250 lf 25.69$ 6,423$ G4015 Entry and Exit Detector Loop 2 ea 12,522.00$ 25,044$ G4016 Generator G4017 250KVA Generator 1 ea 275,000.00$ 275,000$ G4018 Generator Connection Box 1 ea 18,000.00$ 18,000$ G4019 Portable Loadbank 1 ea 19,189.05$ 19,189$ G4020 Generator Feeders 1 ls 40,000.00$ 40,000$ G4021 Generator Controls 1 ls 6,000.00$ 6,000$ G4022 Generator Pad 1 ea 10,000.00$ 10,000$ G4023 Underground Utility G4024 Utility Meter/Transformer Not Included G4025 Utility Primary Conduit and Cable Not Included G4026 Primary Electrical Service 1 alw 45,000.00$ 45,000$ G4027 Communications G4028 Tele / Data Service 1 alw 24,000.00$ 24,000$ G4029 Fire Pump Utility 1 alw 18,000.00$ 18,000$ G4030 Communications Utility 1 alw 25,000.00$ 25,000$ G4031 Solar Panels on Canopy Covering Five (5) Parking Spaces- No Energy Storage (Allowance) 1 alw 350,000.00$ 350,000$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 27 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL SITEWORK DETAIL G4030 Site Lighting G4031 Exterior Lighting Allowance 1 alw 109,000.00$ 109,000$ Subtotal - Building Sitework 2,114,708$ Subtotal 2,114,708$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 63,441$ 12.0%General Conditions 261,378$ 5.0%General Contractor's Overhead & Profit 121,976$ 2.0%Insurance 51,230$ 1.0%Payment & Performance Bonds 26,127$ 0.0%Sustainability Requirements -$ Subtotal - Cost of Work 2,638,861$ 20.0%Estimating Design Evolution 527,772$ 14.0%Escalation Allowance (3rd Qtr. 2029)443,329$ Opinion of Probable Construction Cost 3,609,962$ 0.0%Owner's Soft Costs -$ Opinion of Probable Project Cost 3,609,962$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 28 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 BASE BUILDING Connico 6665.25 RNT ATCT Est 2026-07-10 Page 29 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA CONSTRUCTION SYSTEM COST PER SQUARE FOOT TOTAL A Substructure 39.77$ 95,441$ Standard Foundations 54,156$ Special Foundations -$ Slab on Grade 41,285$ B Shell 236.85$ 568,444$ Superstructure 122,100$ Exterior Closure 352,069$ Roofing 94,275$ C Interiors 84.82$ 203,574$ Interior Construction 127,371$ Interior Finishes 76,203$ D Services 331.68$ 796,029$ Plumbing 125,731$ HVAC 228,418$ Fire Protection 54,568$ Electrical 246,312$ Communications 76,800$ Electronic Safety & Security 64,200$ E Equipment & Furnishings 6.51$ 15,615$ Equipment 3,950$ Furnishings 11,665$ F Special Construction & Demolition -$ -$ Hazardous Material Abatement -$ Subtotal 699.63$ 1,679,103$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 50,373$ 12.0%General Conditions 207,537$ 5.0%General Contractor's Overhead & Profit 96,851$ 2.0%Insurance 40,677$ 1.0%Payment & Performance Bonds 20,745$ 0.0%Sustainability Requirements -$ Subtotal - Cost of Work 873.04$ 2,095,287$ 20.0%Estimating Design Evolution 419,057$ BASE BUILDING SUMMARY Connico 6665.25 RNT ATCT Est 2026-07-10 Page 30 of 42 CONSTRUCTION SYSTEM COST PER SQUARE FOOT TOTAL BASE BUILDING SUMMARY 14.0%Escalation Allowance (3rd Qtr. 2029)352,008$ Opinion of Probable Construction Cost 1,194.31$ 2,866,353$ 0.0%Owner's Soft Costs -$ Opinion of Probable Project Cost 1,194.31$ 2,866,353$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 31 of 42 Project Title Air Traffic Control Tower Siting Study Location Renton Municipal Airport Submittal Stage Rough Order of Magnitude Estimate Client Name Kimley-Horn Client Project No.90235001 Revision 2 Original Date 2-Jun-2026 Revision Date 10-Jul-2026 Construction Start Date 3rd Qtr. 2028 Connico PN 6665.25 Project Lead JRB Checked by TMA DESCRIPTION QUANTITY UNIT UNIT COST TOTAL New Construction Level 01 2,400 sf Lobby 165 sf Corridor 370 sf Reception 178 sf Offices 1,060 sf Training 350 sf Breakroom 137 sf Restroom 46 sf Closet 60 sf Janitor 34 sf Total Area 2,400 sf 2,400 sf A SUBSTRUCTURE A10 Foundations A1010 Standard Foundations A1011 Spread Footings (Column, Strip & Piers)2,400 sf 9.50$ 22,800$ A1012 12" Foundation Wall- 1'-0"x2'-8"234 lf 109.00$ 25,506$ A1013 Perimeter Drainage 234 lf 25.00$ 5,850$ A1030 Special Foundations A1031 Special Foundations Excluded A1050 Slab on Grade A1051 6"- #57 Stone Fill below Slab on Grade 44 cy 75.00$ 3,333$ A1052 4" Slab on Grade 2,400 sf 12.25$ 29,400$ A1053 Turndown- 1'-6"x 1'-6"234 lf 28.00$ 6,552$ A1054 Equipment / Housekeeping Pad 1 ls 2,000.00$ 2,000$ Subtotal - Substructure 95,441$ BASE BUILDING DETAIL AREA ANALYSIS Connico 6665.25 RNT ATCT Est 2026-07-10 Page 32 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL B SHELL B10 Superstructure B1030 Stair Construction B1031 Stair Construction Not Required B1050 Roof Construction B1051 Steel Structure 12 tns 6,800.00$ 81,600$ B1052 Steel Roof Deck 2,400 sf 8.50$ 20,400$ B1053 Concrete Fill to Metal Roof Deck Excluded B1054 Miscellaneous Steel at 5%0.6 tns 7,500.00$ 4,500$ B1055 Roof Fireproofing (Columns + Beams)2,400 sf 6.50$ 15,600$ B1056 Blast Protection Excluded B20 Exterior Closure B2010 Exterior Walls B2011 Metal Panel 3,840 sf 60.00$ 230,400$ B2012 Back-up System to Metal Panel 3,840 sf 18.50$ 71,040$ B2030 Exterior Windows B2031 Storefront 310 sf 110.00$ 34,100$ B2050 Exterior Doors B2051 HM Door, Frame & HW - Single 3 ea 2,850.00$ 8,550$ B2052 HM Door, Frame & HW - Double 1 ea 4,725.00$ 4,725$ B2070 Exterior Soffits B2071 Composite Metal Panel Soffit at Entry 37 sf 65.00$ 2,376$ B2072 Back-up System to Composite Metal Panel Soffit at Entry 37 sf 24.00$ 877$ B30 Roofing B3010 Roof Coverings B3011 TPO Roof Membrane, Cover Board and Rigid Insulation 2,400 sf 32.00$ 76,800$ B3012 Pre-Finished Coping w/ FRT Blocking 240 lf 45.00$ 10,800$ B3013 Roof Scuppers 11 ea 550.00$ 6,050$ B3014 Walkway Pads (Allowance)100 sf 6.25$ 625$ B3015 Fall Protection Anchors Not Indicated Connico 6665.25 RNT ATCT Est 2026-07-10 Page 33 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL B3030 Roof Openings B3031 Roof Openings Not Indicated Subtotal - Shell 568,444$ C INTERIORS C10 Interior Construction C1010 Partitions C1011 GWB Partitions - GWB os 2,900 sf 13.50$ 39,150$ C1012 GWB Partitions - GWB bs 2,875 sf 15.75$ 45,281$ C1013 Rough Carpentry & Blocking 2,400 sf 1.50$ 3,600$ C1014 Caulking, Sealants & Firestopping 2,400 sf 1.75$ 4,200$ C1015 Misc. Metals, Bracing, Countertop Supports, Equipment Supports, etc. 2,400 sf 0.50$ 1,200$ C1030 Interior Doors C1031 HM Door, Frame & HW - Single 9 ea 2,600.00$ 23,400$ C1032 HM Door, HM Frame & HW - Double 1 pr 4,200.00$ 4,200$ C1050 Specialties C1051 Fire Extinguishers 2,400 sf 0.75$ 1,800$ C1052 Code Signage 2,400 sf 0.05$ 120$ C1053 Interior Wayfinding Signage 2,400 sf 0.50$ 1,200$ C1054 36" Grab Bar 1 ea 115.00$ 115$ C1055 42" Grab Bar 1 ea 115.00$ 115$ C1056 18" Grab Bar 1 ea 95.00$ 95$ C1057 Toilet Paper Dispenser 1 ea 125.00$ 125$ C1058 Mirror - 24" x 36"1 ea 195.00$ 195$ C1059 Paper Tower Dispenser & Trash Disposal 1 ea 725.00$ 725$ C1060 Sanitary Napkin Disposal 1 ea 115.00$ 115$ C1061 Seat Cover Dispenser 1 ea 195.00$ 195$ C1062 Wall Hung Soap Dispenser 1 ea 195.00$ 195$ C1063 Towel Hook 1 ea 45.00$ 45$ C1064 Kitchen / Breakroom Accessories 1 ls 500.00$ 500$ C1065 Janitor Closet Accessories 1 ls 200.00$ 200$ C1066 Lockers Not Indicated C1067 Solid Surface Window Sill Not Indicated C1068 Miscellaneous Specialties 2,400 sf 0.25$ 600$ C30 Interior Finishes C3010 Interior Finishes C3011 Floor Finishes C3012 Carpet - Public 1,470 sf 7.00$ 10,290$ C3013 Concrete Sealer 35 sf 3.15$ 110$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 34 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL C3014 Floor Tile 185 sf 24.00$ 4,440$ C3015 Laminate Flooring 715 sf 12.50$ 8,938$ C3016 Base Finishes C3017 Rubber 540 lf 4.50$ 2,430$ C3018 Porcelain Tile 70 lf 22.00$ 1,540$ C3019 Wall Finishes C3020 Paint GWB 6,500 sf 2.00$ 13,000$ C3021 Ceiling Finishes C3022 ACT 1,655 sf 12.50$ 20,688$ C3023 GWB 715 sf 20.50$ 14,658$ C3024 Paint Exposed 35 sf 3.15$ 110$ Subtotal - Interiors 203,574$ D SERVICES D20 Plumbing D2010 Plumbing Systems D2011 Plumbing Fixtures D2012 Water Closets (WC-1); Wall Mtd, Sensor Flush Valve incl. Rough-in 1 ea 2,750.00$ 2,750$ D2013 Lavatories (LV-1); Counter Mtd, Sensor Faucet, incl. Carrier & Rough-in 1 ea 2,460.00$ 2,460$ D2014 Breakroom Sink (SK-1); SS Counter Mtd. w/ ADA Faucet incl. Rough-in 1 ea 1,875.00$ 1,875$ D2015 Mop Sink (MS-1); Floor Mtd. w/ Faucet, Hose and Accessories 1 ea 3,240.00$ 3,240$ D2016 Electric Water Cooler (EWC-1); Dual Height, Bottle Filler Incl. Rough in 1 ea 6,540.00$ 6,540$ D2017 Plumbing Equipment D2018 Electric Water Heater (EWH-1); Instantaneous, Tankless 1 ea 1,350.00$ 1,350$ D2019 Roof Drain (RD-1&2); 15" CI incl. Rough-in 6 ea 1,180.00$ 7,080$ D2020 Water Dispenser Connection (IMB)1 ea 365.00$ 365$ D2021 Hose Bibb (HB-1)1 ea 320.00$ 320$ D2022 Wall Hydrant (NFWH); Non-Freeze 1 ea 545.00$ 545$ D2023 Plumbing Equipment & Accessories Not Currently Shown 2,400 sf 2.75$ 6,600$ D2024 Domestic Water Piping D2025 Domestic Water Pipe, Insulation, Fittings, BFP, Valves, WH Arrestors & Accessories 2,400 sf 8.75$ 21,000$ D2026 Sanitary Waste & Vent D2027 4" Sanitary Entrance UG to 5' Outside Bldg.1 ea 3,500.00$ 3,500$ D2028 Sanitary Waste & Vent Pipe, Fittings, Supports & Accessories 2,400 sf 9.30$ 22,320$ D2029 Stormwater Piping D2030 Stormwater Entrance UG to 5' Outside 1 ea 2,250.00$ 2,250$ D2031 Stormwater Pipe, Fittings & Accessories 2,400 sf 6.50$ 15,600$ D2032 Condensate Drain Piping Connico 6665.25 RNT ATCT Est 2026-07-10 Page 35 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL D2033 Condensate Drain Piping, Insulation & Accessories 2,400 sf 3.50$ 8,400$ D2034 Natural Gas Piping D2035 Natural Gas Piping and Accessories 2,400 sf 1.75$ 4,200$ D2036 Miscellaneous Plumbing D2037 Plumbing General Conditions 2,400 sf 3.88$ 9,312$ D2038 Disinfect, Start-up & Commissioning 2,400 sf 0.38$ 912$ D2039 Seismic Bracing, Firestop, BIM, etc.2,400 sf 0.95$ 2,280$ D2040 Engineering, Shop Drawings, As-Builts 2,400 sf 1.18$ 2,832$ D30 HVAC D3010 HVAC Systems D3011 HVAC Equipment D3012 Air Handling Units (AHUs/RTUs), Piping Hook-Ups, Valves & Accessories 2,400 sf 18.50$ 44,400$ D3013 CRACs & AC Split Systems, Refrigerant Piping & Accessories 2,400 sf 6.50$ 15,600$ D3014 Exhaust Systems; Fans, Louvers, Ventilators, etc. 2,400 sf 1.50$ 3,600$ D3015 HVAC Piping D3016 HVAC Piping, Valves & Accessories 2,400 sf 12.50$ 30,000$ D3017 Air Distribution D3018 Galvanized Ductwork and Fittings 2,640 lb 15.75$ 41,580$ D3019 Ductwork Insulation 1,478 sf 13.70$ 20,254$ D3020 Diffusers, Grilles & Registers 2,400 sf 2.55$ 6,120$ D3021 Misc. Air Distribution; VAV Terminal Units, Fire/Smoke Dampers, MVDs, etc. 2,400 sf 3.15$ 7,560$ D3022 Miscellaneous HVAC D3023 HVAC General Conditions 2,400 sf 7.05$ 16,920$ D3024 Hoisting & Rigging 2,400 sf 1.55$ 3,720$ D3025 Seismic Bracing, Firestop, BIM, etc.2,400 sf 2.15$ 5,160$ D3026 Coordination, Engineering, Submittals & Shop Drawings 2,400 sf 0.96$ 2,304$ D3110 DDC Controls and Instrumentation D3111 DDC Controls and Instrumentation 2,400 sf 10.50$ 25,200$ D3210 Testing, Balancing & Commissioning D3211 Testing, Balancing & Commissioning 2,400 sf 2.50$ 6,000$ D40 Fire Protection D4010 Sprinkler Systems D4011 Fire Suppression System D4012 Fire Department Connection; 6'' Storz 1 ea 5,260.00$ 5,260$ D4013 Fire Hose Valves 2 ea 942.00$ 1,884$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 36 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL D4014 Automatic Wet Pipe Sprinkler System; FW Mains, Branch Piping, Sprinkler Heads, Valves 2,400 sf 13.75$ 33,000$ D4015 Miscellaneous Fire Protection D4016 General Conditions 2,400 sf 1.69$ 4,056$ D4017 Engineering & Design, Submittals, Shop and As-Built Drawings 2,400 sf 1.20$ 2,880$ D4018 Cleaning, Testing and Start-up 2,400 sf 1.35$ 3,240$ D4019 Seismic Restraints 2,400 sf 0.82$ 1,968$ D4020 Hoisting and Rigging 2,400 sf 0.95$ 2,280$ D50 Electrical D5010 Electrical Systems D5011 Distribution Equipment 2,400 sf 10.55$ 25,320$ D5012 Feeders 2,400 sf 24.33$ 58,392$ D5013 Equipment Power and Connection 2,400 sf 10.00$ 24,000$ D5014 Wiring Devices 2,400 sf 22.25$ 53,400$ D5015 Lighting 2,400 sf 23.50$ 56,400$ D5016 Grounding and Lightning Protection 2,400 sf 12.00$ 28,800$ D60 Communications D6010 Communications D6011 Communications 2,400 sf 32.00$ 76,800$ D70 Electronic Safety & Security D7010 Electronic Safety & Security D7011 Video Surveillance System 2,400 sf 12.50$ 30,000$ D7012 Security Access Control 2,400 sf 6.25$ 15,000$ D7013 Fire Alarm 2,400 sf 8.00$ 19,200$ Subtotal - Services 796,029$ E EQUIPMENT & FURNISHINGS E10 Equipment E1010 Equipment E1011 Breakroom / Kitchen Equipment E1012 Refrigerator, Full Size 1 ea 2,800.00$ 2,800$ E1013 Microwave 1 ea 500.00$ 500$ E1014 Coffee Maker 1 ea 650.00$ 650$ E1015 Range (ADA)Not Indicated E1016 Dishwasher (ADA)Not Indicated E1017 Disposal Not Indicated E1018 TV Not Indicated E1019 Shelving Not Indicated Connico 6665.25 RNT ATCT Est 2026-07-10 Page 37 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL E20 Furnishings E2010 Fixed Furnishings E2011 Base Cabinets - Breakroom 7 lf 550.00$ 3,850$ E2012 Wall Cabinets - Breakroom 7 lf 400.00$ 2,800$ E2013 Misc. Casework Allowance 2,400 sf 1.25$ 3,000$ E2030 Window Treatment E2031 Window Shades (Storefront)310 sf 6.50$ 2,015$ E2050 Loose Furnishings E2051 Furniture Excluded Subtotal - Equipment & Furnishings 15,615$ F SPECIAL CONSTRUCTION & DEMOLITION F30 Hazardous Material Abatement F3010 Hazardous Material Abatement F3011 Hazardous Material Abatement Excluded Subtotal - Special Construction & Demolition -$ Subtotal 699.63$ 1,679,103$ General Contractors Markups 0.0%Project Logistics / Phasing & Labor Factor -$ 3.0%General Requirements & Temporary Construction 50,373$ 12.0%General Conditions 207,537$ 5.0%General Contractor's Overhead & Profit 96,851$ 2.0%Insurance 40,677$ 1.0%Payment & Performance Bonds 20,745$ 0.0%Sustainability Requirements -$ Subtotal - Cost of Work 873.04$ 2,095,287$ 20.0%Estimating Design Evolution 419,057$ 14.0%Escalation Allowance (3rd Qtr. 2029)352,008$ Opinion of Probable Construction Cost 1,194.31$ 2,866,353$ 0.0%Owner's Soft Costs -$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 38 of 42 DESCRIPTION QUANTITY UNIT UNIT COST TOTAL BASE BUILDING DETAIL Opinion of Probable Project Cost 1,194.31$ 2,866,353$ Connico 6665.25 RNT ATCT Est 2026-07-10 Page 39 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 EXHIBITS Exhibit A Document List Exhibit B Quality Control Exhibit Connico 6665.25 RNT ATCT Est 2026-07-10 Page 40 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 Exhibit A – Document List The Estimate reflects the specifications and the drawings listed herein and conversations with Kimley-Horn. Drawing or File Date Renton Concept Cost Workbook 50826 2026-05-08 2026.04.24_Issue for Permit_BVU_ATCT Design_Plans_Stamped 2026-05-08 RNT ATCT Siting Study Draft Report 03MAR2026 (1) 2026-05-11 ATCT SITE 1C-EX-2 2026-05-11 RNT Utilities Summary Memo_Site 1C 2026-05-11 Connico 6665.25 RNT ATCT Est 2026-07-10 Page 41 of 42 Air Traffic Control Tower Siting Study Renton Municipal Airport July 10, 2026 Exhibit B – Quality Control Exhibit The Connico Quality Control Policy includes written quality control procedures for the general guidance of its staff in providing services. Each project we undertake is unique. Connico’s Quality Control System has been developed to standardize best management practices given the unique and varied nature of projects in which we are involved. The quality control guidelines are part of a process which describes the functions necessary to make Connico successful on projects. Successful implementation of these quality guidelines improves our quality of service. This process includes multiple levels of internal review. It is Connico’s standard practice for each project team member to be responsible for ensuring quality in the tasks assigned to them in their respective field of expertise. Connico’s internal Project Lead is tasked with performing a review of the project team’s combined efforts. In addition, a second technical review is performed by senior technical staff that did not provide direct input on the project. Finally, an executive level review is utilized to validate and provide an additional layer of oversight for each deliverable. A crucial part of our process is the communication between the design team and Connico during all phases of deliverable development. This provides Connico’s technical professionals an in-depth understanding of any complexities, not yet designed information, and/or potential site issues which could result in uncertainty in Connico’s opinion of probable costs, opinion of probable construction schedule, and other deliverables. This document has been reviewed in accordance with Connico’s Quality Control Guidelines for cost estimating services. Project Lead Review Jeffrey R. Bowman, CPE Senior Cost Specialist jrbowman@connico.com Technical Peer Review Tere Ayers, CEP Cost Specialist tmayers@connico.com Executive Review Charl J. Neser, MRICS, CCP Chief Cost Specialist cjneser@connico.com Connico 6665.25 RNT ATCT Est 2026-07-10 Page 42 of 42 Renton Municipal Airport | ATCT Siting Study Report 59 Appendix G. Financial Feasibility Analysis Item 2018 Budget 2019 Budget 2020 Budget 2021 Budget 2022 Budget 2023 Budget 2024 Budget *2025 Budget *2026 Budget *2027 Budget *2028 Budget *2029 Budget *2030 Budget Total Revenues 3,503,323$ 3,177,298$ 2,906,657$ 3,295,371$ 4,093,908$ 4,800,061$ 4,570,941$ 4,778,151$ 4,994,754$ 5,221,176$ 5,457,862$ 5,705,278$ 5,963,910$ Total Expenditures 2,713,567$ 3,270,117$ 2,736,107$ 3,588,050$ 3,354,236$ 3,263,367$ 3,445,628$ 3,585,555$ 6,115,873$ 9,844,458$ 4,040,362$ 8,973,859$ 15,106,373$ Environmental/Initial Design -$ -$ -$ -$ -$ -$ -$ -$ 2,384,709$ -$ -$ -$ -$ Final Design/Permitting -$ -$ -$ -$ -$ -$ -$ -$ -$ 5,961,772$ -$ -$ -$ Construction Admin -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ 4,769,418$ -$ Construction/Equipment/Demo Old Tower -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ 10,731,190$ Operating Grants and Contributions 138,021$ 143,030$ 109,000$ 124,248$ 152,309$ 8,019$ 72,855$ -$ -$ -$ -$ -$ -$ Capital Grants and Contributions -$ -$ -$ -$ -$ 809,965$ 757,831$ -$ -$ -$ -$ -$ -$ Local Grants/Contributions -$ -$ -$ -$ -$ -$ -$ -$ 450,000$ 600,000$ -$ 625,000$ 6,540,000$ Federal Grants -$ -$ -$ -$ -$ -$ -$ -$ 350,000$ 600,000$ -$ 625,000$ 11,460,000$ State Grants -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ -$ 200,000$ -$ Total Grants and Contributions 138,021$ 143,030$ 109,000$ 124,248$ 152,309$ 817,984$ 830,686$ -$ 800,000$ 1,200,000$ -$ 1,450,000$ 18,000,000$ SURPLUS/ (DEFICIT) 927,777$ 50,211$ 279,550$ (168,431)$ 891,981$ 2,354,678$ 1,955,999$ 1,192,596$ (321,119)$ (3,423,282)$ 1,417,500$ (1,818,581)$ 8,857,537$ *Indicates estimated future years budget amounts based on six-year compound annual growth rate 2018-2024 Total Revenues CAGR 5% 2018-2024 Total Expenditures CAGR 4% Potential State Grant Funds 200,000$ Federal Grant Funds 13,505,184$ ATCT Siting Study ROM Costs Total 23,847,088$ Overall Soft Costs Total 3,607,450$ Overall FAA Costs 2,645,000$ Overall Base Project Total 17,594,638$ Airport Revenues Summary Airport Cash Flow Analysis with Grants and Contributions Renton Municipal Airport | ATCT Siting Study Report 60 Appendix H. FAA SRM Meeting Minutes Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 1 Federal Aviation Administration (FAA) representatives of the Western Service Area (WSA) and Renton Municipal Airport (RNT) participated in the siting activities at RNT located in Renton, Washington on 04/21/2026 and 04/22/2026. The team followed FAA Order 6480.4C, Siting Airport Traffic Control Towers. National Coordinator (NC): Scott Mann Safety Risk Management (SRM) Panel Facilitator: John Carr/Marty Berry Participants: See Attachment 1. Purpose of Meeting: To determine the optimum height, cab size, and location of a replacement Airport Traffic Control Tower (ATCT). Agenda a. Introductions b. Airport Layout Plan (ALP) Overview c. Assessment of Preferred Sites – Control Personnel d. SRM Panel Assessment e. Recommended Site f. Actions 1. Overview of Airport Model and Preferred Sites a. An overview of the airport model was provided to all participants, to include identification of aircraft movement and definitions of colors: • Green – Future Taxiways/Pavement/Runways/Extensions • Red – To Be Removed or Removed Areas/Buildings • Blue – Future Buildings • Light Blue – Future Development Areas • Purple Line – Existing Property Line • White Line – Building Restriction Line (BRL) b. Pre-Sites Summary: Site 1A, Site 1C, Site 1D, Site 2A, Site 2B, and Site 4. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 2 Figure 1. RNT Overview with Original Pre-Sites 2. Preferred Site Assessment by the Air Traffic Control Team: See Attachment 2. 3. Selection of Pre-Sites. All quadrants of the airport were considered for pre-site locations. However, Lake Washington blocked any options to the north, the Boeing factory blocked any options to the east, and the City of Renton blocked any options to the South. All pre- sites were on the west side of the field due to the previous constraints. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 3 4. Air Traffic Recommended Site: The Air Traffic recommended site is Site 1C (see Attachment 2 for details and Attachment 3 for the site comparison chart). Site 1C was selected over the other sites due to the following advantages: • Site 1C is the nearest site to the current tower. • Site 1C does not require the demolition of a new hangar that brings in revenue. • Site 1C has infrastructure in place. • The tower will be the appropriate height for the airport budget. • Site 1C provides good overall visibility. • The LOS at Site 1C is good and an improvement over the LOS from the current tower for east, south, and inbound views. 5. Site Rankings (Air Traffic Order of Preference): Site 1C, Site 1A, and then Site 1D. 6. Post-Siting Actions: See Attachment 11. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 4 Attachment 1 – Participant List Andrew Scanlon (Airport Consultant/Kimley-Horn) Manny Cruz (RNT Airport Director) Bryan Bourgoin Marty Berry (SRM Panel Facilitator) Bryan Estabrooks Matt Ballon Dave Byers (Airport Consultant/Quadrex) Matt Clark Dave Parker Melanie Rodden David Williams (Airport Consultant/Kimley-Horn) Michael Sabates Derek Mefford Mike Lally Douglas Switzer Nate Krueger Evan Jagielo Pete Deeks (Airport Consultant/AJT) Garry Brown Rita Moore George Buley Scott Mann (NC) Glennis Santiesteban Shari Teel Greg Cummings Steve Fernandes Jeff Fischer Thomas Warren John Carr (SRM Panel Facilitator) Tim House Johnathan Winters (RNT ATM) Timothy Burdick Jose Duran Tom Holmes Jovan Aguilar William Adams (RNT Program Manager) Keith Halvorsen William Chesnutt Kim Ledford Lillie Smith Liz Argento Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 5 Attachment 2 – Sites Assessed NOTE: During the siting assessment, the cab can be rotated, and the controller can take a step back and/or move their head to look around columns and mullions to achieve the best operational line of sight. Refer to the Safety Risk Management Document (SRMD) for details. 1. Site 1A A. Reference Location: Center of the field, just west of the perimeter road. B. Airport Quadrant: West C. ATCT Orientation: Northeast from Local Control (LC) D. Acreage: ½ acre E. Cab Size Evaluation: An eight (8)-sided 440-square-foot (sf) cab is large enough and configured to fit all approved positions and accommodate controller movement during consolidated/slow traffic periods with additional space for expansion, if needed. F. Console Discussion: The ATCT will have slat-wall consoles. G. Utilities: Utilities are nearby, existing, and easily accessible. H. Access: There is existing road access. I. Rotating Beacon: The beacon is currently located on top of the existing tower, and the airport would like to relocate it to the top of the new tower. J. Position Locations: • LC – Panel D • Ground Control (GC)/Flight Data (FD)/Clearance Delivery (CD) – Panel B • Controller-In-Charge (CIC) – Panel C K. Stair Location/Orientation: Left Ingress/Egress L. No Effect Height: 456 ft. Mean Sea Level (MSL) Top of Tower (TOT) M. Minimum Height (.8 look down): 33 ft. AGL N. Starting Cab Height: 33 ft. AGL cab floor; Cab Rotation: 0 degrees Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 6 O. Mullion Assessment (6″×8″): Starting at 33 ft. AGL cab floor; Cab Rotation: 0 degrees NOTE: ATC indicated that they could take a step back and/or move their head left or right to achieve an operational line of sight. (1) Unobstructed View (All runways and any other takeoff/landing areas; consider air traffic in the vicinity of the airport): • LC: The RNT ATM moved the cab up from 33 ft. AGL cab floor to 50 ft. AGL cab floor, 60 ft. AGL cab floor, 70 ft. AGL cab floor, 74 ft. AGL cab floor (per Airport Consultant/Pete Deeks request), and then 80 ft. AGL cab floor to see the movement areas over the PSO 622 Hangar near TWY Alpha. Taxiways, runways, and aircraft lined up are visible. NOTE: The ATM stated that the mullion between Panel E and Panel D does not interfere with seaplane approaches (water is advisory only). • GC: The RNT ATM scanned the airport from RWY 34 to RWY 16, and stated that all taxiways, intersections, Hold Short Lines (HSLs), and aircraft are visible. (2) Visibility Analysis (Allow for viewing all taxiways and controlled movement areas; must include the evaluation of both moving and parked aircraft): (a) Look-Down Angle: • LC: The RNT ATM confirmed the view of ground is good. • GC: The RNT ATM stated the view of ground operations is good. (b) Look Across LOS: • LC: The RNT ATM verified the view across the airfield is good. • GC: The RNT ATM stated the view across the airfield is good. (c) Look-Up Angle: • LC: The RNT ATM reviewed the patterns for RWY 16L and RWY 34R at 1,000 ft. and the view is good. • GC: The RNT ATM reviewed the pattern for RWY 16L at 1,000 ft. and the view is good. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 7 Final Cab Floor Height: 80 ft. AGL cab floor. The tower height was increased above the .8 to see the movement areas over the PSO 622 Hangar near TWY Alpha. Final Cab Rotation: 0 degrees Mullion Final Selection: 6″×8″ P. 2-Point Lateral Discrimination: The RNT ATM was able to differentiate aircraft between runways/taxiways. Q. Advantages: • Site 1A provides a great LOS to taxiways, Airbus ramps, and aircraft movement areas. • No demolition is necessary for Site 1A. • Site 1A provides secure parking within the fence. R. Disadvantage: The PSO 622 Hangar required the height of the ATCT to be higher in order to see movement areas near TWY Alpha. S. Safety Risk Management Panel: A safety analysis was conducted on Site 1A. The SRM Panel Facilitator will provide the final safety analysis to the stakeholders. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 8 2. Site 1C (Recommended Site) A. Reference Location: Southwest of the current tower. B. Airport Quadrant: West C. ATCT Orientation: Northeast from LC D. Acreage: ½ acre E. Cab Size Evaluation: An eight (8)-sided 440-sf cab is large enough and configured to fit all approved positions and accommodate controller movement during consolidated/slow traffic periods with additional space for expansion, if needed. F. Console Discussion: The ATCT will have slat-wall consoles. G. Utilities: Utilities are nearby, existing, and easily accessible. H. Access: There is existing road access. I. Rotating Beacon: The beacon is currently located on top of the existing tower, and the airport would like to relocate it to the top of the new tower. J. Position Locations: • LC – Panel D • GC/FD/CD – Panel B • CIC – Panel C K. Stair Location/Orientation: Left Ingress/Egress L. No Effect Height: 460 ft. MSL TOT M. Minimum Height (.8 look down): 34 ft. AGL N. Starting Cab Height: 34 ft. AGL cab floor; Cab Rotation: 0 degrees O. Mullion Assessment (6″×8″): Starting at 34 ft. AGL cab floor; Cab Rotation: 0 degrees NOTE: ATC indicated that they could take a step back and/or move their head left or right to achieve an operational line of sight. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 9 (2) Unobstructed View (All runways and any other takeoff/landing areas; consider air traffic in the vicinity of the airport): • LC: The RNT ATM moved the tower height from 34 ft. AGL cab floor to 50 ft. AGL cab floor , 60 ft. AGL cab floor, and then to 62 ft. AGL cab floor to see over the PSO 622 Hangar. The ATM scanned from RWY 16 to RWY 34 and all movement areas look great. The cab was rotated from 0 degrees to 354 degrees, and then to 356 degrees to move a mullion between Panel C and Panel B to obtain a better LOS to TWY Bravo 6. At this height and rotation, all HSLs, runways, taxiways, and intersections look good. • GC: The RNT ATM confirmed that all aircraft, HSLs, taxiways, and runways can be seen and do not blend in. The mullion between Panel D and Panel C blocks the view a little bit, but the controller can lean or move to obtain a good LOS. (2) Visibility Analysis (Allow for viewing all taxiways and controlled movement areas; must include the evaluation of both moving and parked aircraft): (a) Look-Down Angle: • LC: RNT ATM confirmed the view of ground is good. • GC: The RNT ATM stated that the view of ground operations looks good. (b) Look Across LOS: • LC: The RNT ATM verified the view across the field look good. • GC: The RNT ATM specified the view across the airfield is good. (c) Look-Up Angle: • LC: The RNT ATM stated the view into the pattern looks good. Pattern reviewed was RWY 16L at 1,000 ft., and the view was good. • GC: The RNT ATM confirmed that the view up into the pattern and traffic is good. Final Cab Floor Height: 62 ft. AGL cab floor. The tower height was increased above the .8 to see over the PSO 622 Hangar. Final Cab Rotation: 356 degrees Mullion Final Selection: 6″×8″ Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 10 P. 2-Point Lateral Discrimination: RNT ATC was able to differentiate aircraft between runways/taxiways. Q. Advantages: • Site 1C will not require a temporary tower. • No buildings would need to be demolished prior to construction at Site 1C. • Site 1C has infrastructure in place. • Site 1C is the shortest viable tower. • Site 1C provides a good LOS of the airfield, even on the TWY Alpha side. R. Disadvantages: • The PSO 622 Hangar creates LOS issues, which resulted in a taller tower. • The airport may have to reroute the tenant to the south’s access to the airport. • The landside access for the Northwest Seaplane 608 Hangar may be disrupted. • Site 1C is not inside the Air Operations Area (AOA), so more security fencing would be required. S. Safety Risk Management Panel: A safety analysis was conducted on Site 1C. The SRM Panel Facilitator will provide the final safety analysis to the stakeholders. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 11 3. Site 1D A. Reference Location: South of the current tower. B. Airport Quadrant: West C. ATCT Orientation: Northeast from LC D. Acreage: ¾ acre E. Cab Size Evaluation: An eight (8)-sided 440-sf cab is large enough and configured to fit all approved positions and accommodate controller movement during consolidated/slow traffic periods with additional space for expansion, if needed. F. Console Discussion: The ATCT will have slat-wall consoles. G. Utilities: Utilities are nearby, existing, and easily accessible. H. Access: There is existing road access. I. Rotating Beacon: The beacon is currently located on top of the existing tower, and the airport would like to relocate it to the top of the new tower. J. Position Locations: • LC – Panel D • GC/FD/CD – Panel B • CIC – Panel C K. Stair Location/Orientation: Left Ingress/Egress L. No Effect Height: 463 ft. MSL TOT M. Minimum Height (.8 look down): 34 ft. AGL N. Starting Cab Height: 34 ft. AGL cab floor; Cab Rotation: 0 degrees O. Mullion Assessment (6″×8″): Starting at 34 ft. AGL cab floor; Cab Rotation: 0 degrees NOTE: ATC indicated that they could take a step back and/or move their head left or right to achieve an operational line of sight. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 12 (3) Unobstructed View (All runways and any other takeoff/landing areas; consider air traffic in the vicinity of the airport): • LC: The RNT ATM raised the tower from 34 ft. AGL cab floor to 50 ft. AGL cab floor to make the view less flat and have a better view and delineation of the aircraft runup area. The cab was rotated from 0 degrees to 354 degrees to obtain a better LOS around a mullion between Panel C and Panel B; however, TWY Alpha is lost due to the height. To remedy the view of TWY Alpha, Site 1D was relocated 52 feet to the west. After the relocation of Site 1D, the current ATCT blocks the LOS in a movement area. The airport mentioned they could expedite the removal of the tower as soon as ATC moves to the new ATCT in order to mitigate risk (note, for the siting, the view of the current ATCT was turned off). With the current tower turned off, the RNT ATM stated the view is good and all aircraft on taxiways, runways, and intersections are visible. Tower was moved to up to 52 ft. AGL cab floor to accommodate the spatial requirements of the airfield. NOTE: RNT Program Manager/William Adams stated that the airport will issue a memo to place signage to let aircraft know they are not in sight of the tower (see Attachment 10). • GC: The RNT ATM stated that the mullion between Panel D and Panel C blocks a bit of the LOS of TWY Alpha, TWY Alpha 1, and TWY Bravo but the controller can take a step back/move to obtain a good LOS so no rotation is needed. (2) Visibility Analysis (Allow for viewing all taxiways and controlled movement areas; must include the evaluation of both moving and parked aircraft): (a) Look-Down Angle: • LC: RNT ATM confirmed the view of ground is good. • GC: The RNT ATM stated that the view of ground operations looks good. (b) Look Across LOS: • LC: The RNT ATM verified the view across the field looks good. • GC: The RNT ATM stated the view of the airfield looks good. (c) Look-Up Angle: Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 13 • LC: The RNT ATM noted the view of the pattern and traffic is good. Reviewed the pattern for RWY 16L at 1,000 ft. and the view is good. • GC: The RNT ATM confirmed that the view up into the pattern and traffic is good. Reviewed the pattern for RWY 16L at 1,000 ft. and the view is good. Final Cab Floor Height: 52 ft. AGL cab floor. The tower height was increased above the .8 to accommodate spatial requirements. Final Cab Rotation: 354 degrees Mullion Final Selection: 6″×8″ P. 2-Point Lateral Discrimination: RNT ATC was able to differentiate aircraft between runways/taxiways. Q. Advantages: • The ATCT at Site 1D is shorter and will be less expensive. • There is existing infrastructure at Site 1D. • From LC, the view of the airfield is decent. R. Disadvantages: • Site 1D will require AOA fencing changes. • For hold shorts, more controller movement will be required to maintain the LOS around mullions. S. Safety Risk Management Panel: A safety analysis was conducted on Site 1D. The SRM Panel Facilitator will provide the final safety analysis to the stakeholders. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 14 4. Site 2A (Non-Viable) Site 2A is non-viable due to the height required to achieve acceptable LOS and the associated cost to construct the tower. 5. Site 2B (Non-Viable) Site 2B is non-viable due to its distance from the end of the runway. 6. Site 4 (Non-Viable) Site 4 is non-viable due to the height required to achieve acceptable LOS and the associated cost to construct the tower. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 15 Attachment 3 – Site Comparison Chart Item Description Site 1A Site 1C Site 1D Recommended Site: Recommended Latitude 47°29'31.80"N 47°29'30.62"N 47°29'29.84"N Longitude 122°13'3.92" 122°13'3.14"W 122°13'2.78"W Reference Location Center of field w of perimeter road. SW of the current tower S of the current tower Airport Quadrant WEST WEST WEST Square Acreage ½ ACRE ½ ACRE ¾ ACRE Cab Orientation NE NE NE Cab Size 440SF 440SF 440SF Interior Columns (Mullions) Control Positions Location [Respect to CAB Ref Points by Control Position (i.e., LC, LC2, GC, FD, CD, SUPE/CIC, Other)] Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F GC CIC LC Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F GC CIC LC Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F GC CIC LC Perimeter Columns (Columns) Control Positions Location [Respect to CAB Ref Points by Control Position (i.e., LC, LC2, GC, FD, CD, SUPE/CIC, Other)] Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F Pa n e l A Pa n e l B Pa n e l C Pa n e l D Pa n e l E Pa n e l F Stairs LEFT LEFT LEFT TERPS No Effect Height (NEH) 456’ MSL 460’ MSL 463’ MSL Cab Floor Level (AGL) 80’ 62’ 52’ Cab Floor Level (AMSL) 105’ 87’ 76’ Eye-Level (AGL) * 85’ 67’ 57’ Eye-Level (AMSL) 110’ 92’ 81’ Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 16 Item Description Site 1A Site 1C Site 1D Top of Tower (AGL) 115’ 97’ 87’ Top of Tower (AMSL) 140’ 122’ 111’ Estimated Ground Level at Tower * 25’ 25’ 26’ Ground Elevation at Key Point (Threshold Elev) * 24’ 24’ 24’ Tower to Key Point Distance (Farthest RWY Distance) (RWY Threshold) * 2,730’ (RW-16) 2,844’ (RW-16) 2,922’ (RW-16) Columns Interior (Mullions) 6X8 6X8 6X8 Perimeter (Columns) NA NA NA Cab Rotation (Start/Final) Columns: Columns: Columns: Mullions: 000/000 Mullions: 000/356 Mullions: 000/354 2-Point Lateral Discrimination (Deg) PASS PASS PASS Distance from the Tower to the Farthest Runway’s Holdline 2,890’ 3110’ 3,091’ Distance from the Farthest Runway to the Nearest Holdline 285’ 285’ 285’ Line of Sight Angle of Incidence (.8 lookdown) 1.80 1.37 1.16 Object Discrimination Minivan – Front View Pass Fail Pass Fail Pass Fail Minivan – Side View Pass Fail Pass Fail Pass Fail 14 CFR Part 77 Impacts YES YES YES ATCT Potential Impacts to Future & Existing NAVAIDs UNK UNK UNK Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 17 Item Description Site 1A Site 1C Site 1D Equipment Configuration Slat-Wall Traditional Slat-Wall Traditional Slat-Wall Traditional Access to ATCT Site (Yes or No) YES YES YES Rotating Beacon TOT TOT TOT TOPR Issues YES YES YES Airspace – Lat/Longs (4 Corners) S1A-C1: 47°29'31.93"N, 122°13'4.16"W S1A-C2: 47°29'31.64"N, 122°13'4.12"W S1A-C3: 47°29'31.67"N, 122°13'3.69"W S1A-C4: 47°29'31.96"N, 122°13'3.73"W S1C-C1: 47°29'30.74"N,1 22°13'3.39"W S1C-C2: 47°29'30.45"N,1 22°13'3.31"W S1C-C3: 47°29'30.50"N,1 22°13'2.87"W S1C-C4: 47°29'30.79"N,1 22°13'2.96"W S1D-C1: 47°29'29.95"N,1 22°13'2.25"W S1D-C2: 47°29'29.66"N,1 22°13'2.18"W S1D-C3: 47°29'29.71"N,1 22°13'1.74"W S1D-C4: 47°29'30.00"N,1 22°13'1.82"W 4-Corners Images * Human Factors Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 18 Attachment 4 – Site Location Aerial View Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 19 Attachment 5 – Human Factors Analysis Site 1A: Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 20 Site 1C: Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 21 Site 1D: Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 22 Attachment 6 – Preliminary Terminal Instrument Procedures (TERPS) Analysis RNAV (GPS) Y RWY 16 Missed approach surface at: • Site 1A: 680’ • Site 1C: 680’ • Site 1D: 680’ • Site 2A: 680’ RNAV (GPS) Z RWY 16 Missed approach surface at: • Site 1A: 456’ • Site 1C: 460’ • Site 1D: 463’ • Site 2A: 404’ RNAV (GPS) RWY 34 Missed approach surface at: • Site 1A: 735’ • Site 1C: 740’ • Site 1D: 740’ • Site 2A: 718’ Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 23 Attachment 7 – Technical Operations Preliminary Review (TOPR) Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 24 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 25 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 26 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 27 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 28 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 29 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 30 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 31 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 32 Attachment 8 – Controller Positions/Cab Orientation Drawing Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 33 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 34 Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 35 Attachment 9 – Memo of Record Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 36 Attachment 10 – Acknowledgment of Requirements and Control Tower Transition Plan Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 37 Attachment 11 – Sponsor Post-Siting Action Items – RNT, 04/21/2026 and 04/22/2026 Item Action POC Due Date Comments 1 Meeting Minutes National Coordinator Approximately two (2) weeks after the completion of the siting activity Develop the meeting minutes, distribute to all participants, and post on the Siting Knowledge Sharing Network (KSN). 2 Safety Risk Management Document (SRMD) Safety Management System (SMS) Facilitator Approximately three (3) months after the completion of the siting activity After approval, the SRMD will be provided to the stakeholders and included in the final siting report posted on the Siting KSN. 3 Service Area Coordination and Issue Resolution Siting Team Members On-going All team members are tasked to resolve issues within their area of expertise identified during the siting. The Terminal Engineering – Project Engineer Lead (if applicable) will provide the follow-up coordination as needed. 4 Submit FAA Form 7460- 1(s) for the Recommended Site and All Preferred Sites Airport Sponsor Submit within two (2) weeks of the completion of the siting activity Submit Notice of Proposed Construction or Alteration (FAA Form 7460-1) with 1A accuracy for the Recommended Site to obtain a final determination letter and for each of the remaining preferred sites to obtain a feasibility study. Once filed, notify Scott Mann of the ASNs. Once determined, send the final determination letters to Scott Mann. kendall.s-ctr.mann@faa.gov NOTE: For all sites (Recommended Site and all preferred sites), submit the latitude/longitude of the four corners, versus the center point. This information can be provided by the National Coordinator and will also be identified on the cab orientation drawings. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 38 Item Action POC Due Date Comments 5 Protect the Recommended Site Airport Sponsor Within two (2) weeks of receipt of the final determination letter Upon receipt of the final determination letter for the Recommended Site, notify Technical Operations – OESG to enter the Recommended Site data into the appropriate database (for example, the OE/AAA database) to provide future protection of the site. 6 Initiate Siting Report Terminal Facilities Technical Writer The Siting Report should be approved no later than six (6) months after the siting activity 7 Obtain Siting Report Approval Terminal Facilities Siting Team/Program Implementation Manager (PIM) The Terminal Facilities Siting Team will coordinate Siting Report approval, with the assistance of the PIM, six (6) months after the Siting Assessment (1) The PIM will brief the siting report to the Service Area Director of Air Traffic Operations and Service Area Director of Technical Operations for their concurrence. (2) The Terminal Facilities Siting Team will brief the siting report to the Director of Facilities & Engineering Services for their concurrence. 8 Issue the Final Siting Report Terminal Facilities Technical Writer Approximately six (6) months after the completion of the siting activity After approval, the Siting Report will be posted on the Siting KSN. 9 Update the Airport Layout Plan (ALP) Airport Sponsor/Airports Regional and District Offices Complete after the final siting report is issued Coordinate with the Airport Sponsor/Airports Regional and District Offices to add the Recommended Site to the current ALP to ensure protection of the LOS. Renton Municipal Airport (RNT) Renton, Washington Meeting Minutes April 21–22, 2026 39 Item Action POC Due Date Comments 10 Submit FAA Form 7460-1 for Final Recommended Site Airport Sponsor Resubmit FAA Form 7460-1 to update the aeronautical study to protect the LOS of the Recommended Site. NOTE: For the Final Recommended Site, submit the latitude/longitude of the four corners, versus the center point. This information can be provided by the National Coordinator and will also be identified on the cab orientation drawings. 11 Protect the Recommended Site Project Engineer Lead, or the Airport Sponsor as applicable Upon receipt of the final determination letter for the Recommended Site Upon receipt of the final determination letter for the Recommended Site, notify Technical Operations – OESG to enter the Recommended Site data into the appropriate database (for example, the OE/AAA database) to provide future protection of the site. Renton Municipal Airport | ATCT Siting Study Report 61 Appendix I. Updated ALP Drawing w/”Pen and Ink” Change 1 COVER SHEET 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ C O V E R S H E E T . D W G 10 / 1 0 / 2 0 2 2 2 : 3 5 : 2 6 P M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 VICINITY MAP LOCATION MAP RENTON MUNICIPAL AIRPORT AIRPORT LAYOUT PLAN UPDATE 616 W PERIMETER ROAD RENTON, WA 98057 3089600-130659.06 JUNE 2022 AIRPORT LAYOUT PLAN SHEET LIST Sheet Number Sheet Title Revised 1 COVER SHEET JUNE 2022 2 AIRPORT DATA JUNE 2022 3 AIRPORT LAYOUT PLAN JUNE 2022 4 AIRPORT AIRSPACE PLAN & PROFILE JUNE 2022 5 INNER APPROACH SURFACE RUNWAY 16 JUNE 2022 6 INNER APPROACH SURFACE RUNWAY 34 JUNE 2022 7 DEPARTURE SURFACES - PLAN & PROFILE JUNE 2022 8 TERMINAL AREA PLAN JUNE 2022 9 SOUTH AREA PLAN JUNE 2022 10 NORTH AREA PLAN JUNE 2022 11 AIRPORT LAND USE PLAN JUNE 2022 12 AIRPORT PROPERTY MAP JUNE 2022 REVISIONS KING COUNTY Figure E1 Cover Sheet E.3 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 2 AIRPORT DATA CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ A I R P O R T D A T A . D W G 9/ 3 0 / 2 0 2 2 9 : 3 2 : 0 0 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 10 20 NN E 30 4 0 N E 5 0 6 0 E N E 7 0 8 0 90 E 10 0 11 0 ES E 12 0 130 SE140 150 SSE 160 170180 S 190 200 SS W 21 0 2 2 0SW 2 3 0 2 4 0 W S W 2 5 0 2 6 0 27 0W 28 0 29 0 WN W 30 0 310 NW 320 330 NNW 340 350 360 N 28 27 22 21 17 16 11 10 KNOTS WIND COVERAGE: 95.6 + + + + .1 .1 + + + .2.7.8.5.2.1.1 + + + + + + + + .1 .6 .3 .3 .1 +++ + + +.1+++ + + + + ++ + ++ + + + 99.89 % 34 16 ALL-WEATHER WIND COVERAGE SUMMARY RUNWAY 10.5-Knot 13-Knot RUNWAY 16 88.76%88.85% RUNWAY 34 81.22%81.48% RUNWAY 16/34 99.58%99.89% SOURCE: WIND ANALYSIS TABULATION PROVIDED BY MEAD & HUNT UTILIZING THE FAA AIRPORT DESIGN TOOLS, WIND ANALYSIS. WIND DATA OBTAINED FROM NOAA, NCDC, STATION 727934, RENTON. PERIOD OF RECORD 2011-2020. NOTE: A 5-KNOT TAILWIND COMPONENT WAS USED FOR THE INDIVIDUAL RUNWAY END ANALYSIS. 10 20 NN E 30 4 0 N E 5 0 6 0 E N E 7 0 8 0 90 E 10 0 11 0 ES E 12 0 130 SE140 150 SSE 160 170180 S 190 200 SS W 21 0 2 2 0SW 2 3 0 2 4 0 W S W 2 5 0 2 6 0 27 0W 28 0 29 0 WN W 300 310 NW 320 330 NNW 340 350 360 N 28 27 22 21 17 16 11 10 KNOTS WIND COVERAGE: 97.9 + + + + + + .1.2.2.2.1++ + + + + + + .1 .2 .2 .4 .2 +++ ++ + + + + ++ 99.93 % 34 16 IFR WIND COVERAGE SUMMARY RUNWAY 10.5-Knot 13-Knot RUNWAY 16 92.14%92.21% RUNWAY 34 88.32%88.44% RUNWAY 16/34 99.77%99.93% SOURCE: WIND ANALYSIS TABULATION PROVIDED BY MEAD & HUNT UTILIZING THE FAA AIRPORT DESIGN TOOLS, WIND ANALYSIS. WIND DATA OBTAINED FROM NOAA, NCDC, STATION 727934, RENTON. PERIOD OF RECORD 2011-2020. NOTE: A 5-KNOT TAILWIND COMPONENT WAS USED FOR THE INDIVIDUAL RUNWAY END ANALYSIS. Figure E2 Airport Data E.4 49' 89' 70' 44.5' 5' 0' 25' 1B 49' 89' 70' 44.5' 5' 10' 25' 25' 1B 25' 89' 5' 49' 1 1/27/26 Pen & Ink Update ADG I STANDARD 1 1 99' 50' 1B B5 44.5' ADG II STANDARD 1 101.5'101.5'101.5'101.5'101.5' 62'62'62'62'62' 62'62'62' 101.5'101.5'101.5'70' 1 1 PROPOSED ATCT - SITE 1A PROPOSED ATCT - SITE 1C PROPOSED ATCT - SITE 1D 140' 112' 122' 6/15/26 Pen & Ink Update2 2 ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ TOFA TOFA TOFA TOFA TOFA TOFA TOFATOFATOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3 4 5 8 9 11 12 14 15 16 17 18 20 21 22 24 35 37 38 36 34 28 32 33 39 43 44 23 40 10 2 41 42 6 13 19 1 R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA RA M P BLAST FENCE BLAST FENCE BLAST FENCE BLAST FENCE WILL ROGERS WILEY POST MEMORIAL 200'TOFA 131' TWY 50' RSA 150' OFA 500' TOFA 115' TWY 50' TOFA 115' TWY 50' TOFA 89' TWY 25' DT = 340' R500 45 200' 200' TWY 40' TWY 35' TWY 60' 30 0 ' 30 0 ' 35 0 ' 30 0 ' BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 27 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X GATE GATE BLAST FENCE GATE GATE V-11 GATE GATEPEDGATETO F A T S A T O F A TS A TO F A TOFA TSATSA TO F A TO F A TWY 40' TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TS A TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA T S A TWY 41' TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TOF A TWY 40' TWY 40' TWY 50' TO F A TWY 50' P7 7 RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA 25 26 TSS TSS TSS TSS TSS TSS TSS TSS TS S TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS 200' DT = 304' TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA T O F A TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TWY 75' TO F A TO F A TO F A TO F A TO F A TO F A BLAST FENCE H X T O F A TO F A TO F A T S A TOFA 131' 0' 5' 10' 15' 20' 25' 30' 35' 40' 45' 50' 0' 5' 10' 15' 20' 25' 30' 35' 40' 45' 50' 0' 200' 400' 600' 800' 1000' 1200' 1400' 1600' 1800' 2000' 2200' 2400' 2600' 2800' 3000' 3200' 3400' 3600' 3800' 4000' 4200' 4400' 4600' 4800' 5000' 5200' 5400' 5600' 5800' 5982' DI S P L A C E D T H R E S H O L D DI S P L A C E D T H R E S H O L D RU N W A Y 3 4 E N D E L . 3 2 ' RU N W A Y 1 6 E N D E L . 2 4 ' SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 3 AIRPORT LAYOUT PLAN CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ A I R P O R T L A Y O U T D R A W I N G . D W G 9/ 3 0 / 2 0 2 2 9 : 3 8 : 1 5 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 61 6 W P E R I M E T E R R O A D RE N T O N , W A 9 8 0 5 7 FAA APPROVAL RUNWAY 16/34 200' X 5 , 3 8 2 ' N 4°49'37.63"W (TRUE ) 00 300 600 15°34'E MAG. DEC. ± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) EXISTINGDESCRIPTION ROFZ F1 F2 FUTURE FUTURE RUNWAY 1 6 / 3 4 1 5 0 ' X 5 , 3 8 2 ' w / 2 5 ' S H O U L D E R S TOFA TSA 245' 868' 493' 535' 953'15 7 ' 356' 19 0 ' 19 8 ' 13 8 ' 19 3 ' 28 2 ' 17 1 ' 1647' 21 7 ' 44' 57 ' 88' 89' RW16 TDZ EL. 26.2' 8' PERIMETER FENCE ROADWAY EL. 30' ROADWAY EL. 30' ROADWAY EL. 30' ROADWAY EL. 30' ROADWAY EL. 30' ROADWAY EL. 30' BRIDGE EL. 25.6' 5'-0" LINE OF SIGHT RUNWAY 16/34 CENTERLINE PROFILE 00 300 600 00 3 0 6 0 P77 TSS Figure E3 Airport Layout Plan E.5 TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A 1 1 1/27/26 Pen & Ink Update 1 AIRPORT ADMINISTRATION REMOVED XXX X X X X X 1 46 47 48 PROPOSED ATCT - SITE 1A PROPOSED ATCT - SITE 1C PROPOSED ATCT - SITE 1D 2 6/15/26 Pen & Ink Update2 2 140' 112' 122' 2 0' 50' 100' 150' 200' 250' 300' 350' 400' 450' 500' 550' 600' 650' 700' 0' 1000' 2000' 3000' 4000' 5000' 6000' 7000' 8000' 9000' 10000' 11000' 12000' 13000' 14000' 15000' 0' 1000' 2000' 3000' 4000' 5000' 6000' 0' 50' 100' 150' 200' 250' 300' 350' 400' 0'1000'2000'3000'4000'5000'6000'7000'8000'9000'10000'11000'12000'13000'14000'15000' 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 4 AIRPORT AIRSPACE PLAN & PROFILE CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ A I R P O R T A I R S P A C E P L A N . D W G 9/ 3 0 / 2 0 2 2 9 : 3 9 : 4 3 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 2000 4000 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE / Y E A R (JAN 202 0 ) TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW REFER TO INNER APPROACH DRAWINGS FOR CLOSE IN OBSTRUCTION DETAILS. Figure E4 Airport Airspace Plan & Profile E.6 17 18 19 PROPOSED ATCT - SITE 1D PROPOSED ATCT - SITE 1C PROPOSED ATCT - SITE 1A 140.0 122.0 112.0 TRANS. TRANS. TRANS. 89.9 71.9 61.9 TBS TBS TBS 19 18 17 6/15/26 Pen & Ink Update22 22 22 RSA RSA RSA RSA RSA RSA ROFA ROFA ROFA ROFA ROFA ROFA RO F Z ROFZ ROFZ ROFZ ROFZ BRL BRL RA M P WILL ROGERS WILEY POST MEMORIAL P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP X X X X X X X X X GATE RS A P7 7 A P P TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TS S TS S TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS 0'500'1000'1500'2000'2326' 25 50 75 30 35 40 45 55 60 65 70 PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI 39 40 0' 20' 40' 60' 80' 100' 120' 0' 20' 40' 60' 80' 100' 120' 0'200'400'600'800'1000'1200'1400'1600'1800'2000'2200'2326' PO B : 0 + 0 0 . 0 0 P77 P77 P77 P77 P77 P77 TS S TS S TS S TS S TS S TS S TS S TS S PAPI PAPI PAP I PAP I PAP I PAPI PAPI PAP I 39 40 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 5 INNER APPROACH SURFACE RUNWAY 16 CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ I N N E R A P P R O A C H S U R F A C E . D W G 9/ 3 0 / 2 0 2 2 9 : 4 1 : 2 1 A M 00 200 400 NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 EXISTING DISPLACED THRESHOLD EL. 24' EXISTING RUNWAY 16 END EL. 24' LAKE WASHINGTON EL. 18.3' (APPROX.) 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE / Y E A R (JAN 202 0 ) EXISTING DISPLACED THRESHOLD EL. 24' EXISTING RUNWAY 16 END EL. 24' EXISTING APPROACH RPZ EXISTING DEPARTURE RPZ PART 77 NON-PRECISION 'C' APPROACH SURFACE (SLOPE 34:1) EB99 THRESHOLD SITING SURFACE TYPE 4 (SLOPE 20:1) EB99 THRESHOLD SITING SURFACE TYPE 4 (SLOPE 20:1) PART 77 NON-PRECISION 'C' APPROACH SURFACE (SLOPE 34:1) RUNWAY 16 APPROACH PLAN RUNWAY 16 APPROACH PROFILE FUTURE AERONAUTICAL DEVELOPMENT AREA PAPI OCS 2/3 GPA NO.DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 39 BRIDGE 28.85 24.00 4.85 TBS 40 RUNWAY LIGHT 25.18 24.00 1.18 TBS NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 39 BRIDGE 28.85 24.00 2.40 TBS NONE IDENTIFIED TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW. EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA P77 TSS PAPI Figure E5 Runway 16 Inner Approach E.7 RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFZ ROFZ ROFZ ROFZ RO F Z ROFZ ROFZ ROFZ ROFZ BRL BRL BRL BRL BLAST FENCE BLAST FENCE TWY 50' BRL BRL BRL BRL P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP P77 APP X X X X X X X X X X X X X X X X X X RS A TWY 50' TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TS S TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TSS TS S 2765'0'500'1000'1500'2000'2500' 3 117 118 119 124 125 132 134 137 150 151 154 28 ROADWAY 29 ROADWAY 30 ROADWAY 32 ROADWAY 33 ROADWAY 34 ROADWAY 35 ROADWAY 36 ROADWAY 37 ROADWAY 38 ROADWAY 122 123 126 127 116 128 129 130 131 152 153 31 ROADWAY PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI 41 42 43 44 45 46 ROADWAY 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 6364 65 66 67 68 69 70 71 72 7374 75 76 77 78 79 80 81 82 83 84 85 86 87 8889 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 50 75 35 40 45 55 60 65 70 80 0' 20' 40' 60' 80' 100' 120' 0'200'400'600'800'1000'1200'1400'1600'1800'2000'2200'2400'2600' 2765' PO B : 0 + 0 0 . 0 0 P77 P77 P77 P77 P77 P77 TSS TSS TSS TSS TSS TSS TSS 3 116 117 118 119 122 123 124 125 126 127 128 129 130 131 132 134 137 151 152 154 28 29 30 32 33 34 36 37 PAPI PAPI PAPI PAPI PAPI PAPI PAPI PAPI 41 42 43 44 45 93 94 95 96 97 98 99 101 102 103 104 105 106 107 47 48 49 50 51 52 53 54 5556 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 7879 80 81 82 83 84 85 86 87 88 89 90 91 92 150 38 35 153 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 6 INNER APPROACH SURFACE RUNWAY 34 REH JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ I N N E R A P P R O A C H S U R F A C E . D W G 9/ 3 0 / 2 0 2 2 9 : 4 2 : 0 9 A M 00 200 400 NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE / Y E A R (JAN 202 0 ) EXISTING RUNWAY 34 END EL. 32.0' EXISTING DISPLACED THRESHOLD EL. 30.4' EXISTING EB99A THRESHOLD SITING SURFACE TYPE 4 (SLOPE 20:1) EXISTING PART 77 NON-PRECISION 'C' APPROACH SURFACE (SLOPE 34:1) APPROACH RPZ DEPARTURE RPZ PART 77 NON-PRECISION 'C' APPROACH SURFACE (SLOPE 34:1) EB99 THRESHOLD SITING SURFACE TYPE 4 (SLOPE 20:1) RUNWAY 34 APPROACH PLAN RUNWAY 34 APPROACH PROFILE PAPI OCS 2/3 GPA RE N T O N , W A 9 8 0 5 7 EXISTING RUNWAY 34 END EL. 32.0' EXISTING DISPLACED THRESHOLD EL. 30.4' NO.DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 3 BLAST FENCE 42.64 32.00 10.64 TBS 28 ROADWAY 46.99 31.99 11.99 TBS 29 ROADWAY 45.84 30.84 12.01 TBS 30 ROADWAY 45.79 30.79 13.01 TBS 31 ROADWAY 46.60 31.60 5.81 TBS 32 ROADWAY 44.74 29.74 5.46 TBS 33 ROADWAY 43.99 28.99 -3.24 TBS 34 ROADWAY 44.81 29.81 -3.62 TBS 35 ROADWAY 45.00 30.00 -0.95 TBS 36 ROADWAY 45.00 30.00 -27.83 TBS 37 ROADWAY 45.00 30.00 -29.64 TBS 38 ROADWAY 45.00 30.00 -31.76 TBS 41 BLAST FENCE 44.83 32.00 12.83 TBS 42 BLAST FENCE 43.31 32.00 11.31 TBS 43 ACCESS ROAD 41.60 31.60 9.60 TBS 44 ACCESS ROAD 41.13 31.13 9.13 TBS 45 ACCESS ROAD 41.11 31.11 9.11 TBS 46 ROADWAY 29.28 29.28 -9.26 TBS 47 BUILDING 46.79 30.00 8.80 TBS 48 BUILDING 48.18 30.00 11.07 TBS 49 BUILDING 46.90 30.00 10.29 TBS 50 BUILDING 50.91 30.00 12.51 TBS 51 POLE 45.33 30.00 7.97 TBS 52 BUILDING 47.76 30.00 11.79 TBS 53 SIGN 41.70 30.00 5.80 TBS 54 BUILDING 45.04 30.00 7.58 TBS 55 POLE 64.55 30.00 17.03 TBS 56 POLE 64.18 30.00 17.08 TBS 57 POLE 63.35 30.00 16.82 TBS 58 POLE 64.88 30.00 18.96 TBS 59 BUILDING 58.59 30.00 13.15 TBS 60 BUILDING 51.33 30.00 7.12 TBS 61 BUILDING 45.68 30.00 3.23 TBS 62 BUILDING 50.54 30.00 4.35 TBS 63 POLE 54.93 30.00 10.18 TBS 64 BUSH 43.42 30.00 2.49 TBS 65 BUSH 43.51 30.00 -0.25 TBS 66 BUSH 43.60 30.00 3.25 TBS 67 BUILDING 47.63 30.00 6.20 TBS 68 BUILDING 46.65 30.00 5.46 TBS 69 BUILDING 44.48 30.00 0.43 TBS 70 BUILDING 51.88 30.00 7.69 TBS 71 BUILDING 49.43 30.00 5.24 TBS 72 BUILDING 49.38 30.00 6.27 TBS 73 BUILDING 45.88 30.00 1.44 TBS 74 TREE 52.30 30.00 9.65 TBS 75 BUSH 47.76 30.00 1.92 TBS 76 TREE 67.37 30.00 16.13 TBS 77 TREE 65.43 30.00 15.08 TBS 78 TREE 53.68 30.00 2.84 TBS 79 TREE 54.79 30.00 6.44 TBS 80 BUILDING 53.36 30.00 4.46 TBS 81 BUILDING 49.94 30.00 1.55 TBS 82 BUILDING 51.82 30.00 0.48 TBS 83 TREE 62.10 30.00 13.06 TBS 84 TREE 63.21 30.00 12.48 TBS 85 TREE 60.44 30.00 7.55 TBS 86 TREE 67.74 30.00 16.86 TBS 87 TREE 58.77 30.00 6.61 TBS 88 TREE 69.50 30.00 17.95 TBS NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 89 TREE 64.41 30.00 15.68 TBS 90 TREE 65.06 30.00 14.54 TBS 91 BUILDING 56.69 30.00 7.70 TBS 92 BUILDING 59.65 30.00 9.42 TBS 93 TREE 108.26 30.00 32.38 TBS 94 TREE 100.77 30.00 25.06 TBS 95 TREE 88.74 30.00 14.05 TBS 96 TREE 92.44 30.00 18.06 TBS 97 TREE 81.06 30.00 6.86 TBS 98 TREE 81.71 30.00 7.78 TBS 99 TREE 82.17 30.00 8.43 TBS 100 TREE 77.18 30.00 1.85 TBS 101 TREE 109.37 30.00 32.96 TBS 102 TREE 107.43 30.00 30.85 TBS 103 TREE 119.91 30.00 43.22 TBS 104 TREE 98.18 30.00 23.08 TBS 105 TREE 74.96 30.00 2.27 TBS 106 TREE 75.14 30.00 2.24 TBS 107 TREE 119.45 30.00 45.16 TBS 116 LIGHTPOLE 47.72 30.00 13.84 TBS 117 LIGHTPOLE 47.58 30.00 14.13 TBS 118 LIGHTPOLE 47.21 30.00 14.17 TBS 119 LIGHTPOLE 47.02 30.00 14.40 TBS 122 LIGHTPOLE 51.93 30.00 16.62 TBS 123 TREE 59.05 30.00 23.71 TO BE TRIMMED OR REMOVED 124 LIGHTPOLE 55.81 30.00 20.67 TO BE LOWERED OR OB LIGHTED 125 TREE 55.35 30.00 19.80 TO BE TRIMMED OR REMOVED 126 TREE 51.40 30.00 15.44 TBS 127 LIGHTPOLE 56.00 30.00 20.52 TO BE LOWERED OR OB LIGHTED 128 LIGHTPOLE 56.55 30.00 20.59 TO BE LOWERED OR OB LIGHTED 129 SIGN 45.61 30.00 8.81 TBS 130 LIGHTPOLE 56.46 30.00 20.11 TO BE LOWERED OR OB LIGHTED 131 TREE 55.72 30.00 18.62 TBS 132 TREE 56.65 30.00 19.49 TBS 134 UTILITY 63.86 30.00 23.22 TO BE LOWERED OR OB LIGHTED 137 TREE 100.95 30.00 57.62 TO BE TRIMMED OR REMOVED 150 UTILITY 57.95 30.00 18.69 TBS 151 UTILITY 60.35 30.00 20.75 TBS 152 UTILITY 65.20 30.00 25.18 TO BE LOWERED OR OB LIGHTED 153 UTILITY 54.61 30.00 13.87 TBS 154 UTILITY 60.13 30.00 18.76 TBS NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 123 TREE 59.05 30.00 5.00 TO BE TRIMMED OR REMOVED 124 LIGHTPOLE 55.81 30.00 1.50 TO BE LOWERED OR OB LIGHTED 125 TREE 55.35 30.00 1.10 TO BE TRIMMED OR REMOVED 127 LIGHTPOLE 56.00 30.00 1.20 TO BE LOWERED OR OB LIGHTED 128 LIGHTPOLE 56.55 30.00 0.90 TO BE LOWERED OR OB LIGHTED 130 LIGHTPOLE 56.46 30.00 0.20 TO BE LOWERED OR OB LIGHTED 134 UTILITY 63.86 30.00 0.80 TO BE LOWERED OR OB LIGHTED 137 TREE 100.95 30.00 33.20 TO BE TRIMMED OR REMOVED 152 UTILITY 65.20 30.00 3.20 TO BE LOWERED OR OB LIGHTED NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 137 TREE 100.95 30.00 TO BE TRIMMED OR REMOVED TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW. EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA P77 TSS PAPI Figure E6 Runway 34 Inner Approach E.8 50 10 0 15 0 20 0 25 0 30 0 12152 05001000150020002500300035004000450050005500600065007000750080008500900095001000010500110001150012000 40 0' 20' 40' 60' 80' 100' 120' 140' 160' 180' 200' 220' 240' 260' 280' 300' 320' 340' 360' 380' 400' 420' 440' 460' 480' 500' 520' 540' 560' 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 0''500''1000''1500''2000''2500''3000''3500''4000''4500''5000''5500''6000''6500''7000''7500''8000''8500''9000''9500''10000''10500''11000''11500''12000''12152'' DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS 40 0' 20' 40' 60' 80' 100' 120' 140' 160' 180' 200' 220' 240' 260' 280' 300' 320' 340' 360' 380' 400' 420' 440' 460' 480' 500' 520' 540' 560' 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 0' 500' 1000' 1500' 2000' 2500' 3000' 3500' 4000' 4500' 5000' 5500' 6000' 6500' 7000' 7500' 8000' 8500' 9000' 9500' 10000' 10500' 11000' 11500' 12000'12152' DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS DS 155 156 45 3 41 42 44 43 30 29 118 117 116 28 53124 127 128 52 49 129 51 130 47 50 151152 134153 63 60 59 75 62 58 5756 55 80 91 92 31 32 67 71 72 70 68 6 7 8 9 10 11 12 13 14 1516 12152 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 10 0 15 0 20 0 25 0 53 155 156 116 117 129 130 134 153 3 28 31 32 43 44 47 49 55 56 59 60 62 63 68 70 92 118 124127 128 29 30 41 42 45 151 152 50 51 52 57 58 67 71 72 75 80 91 6 HIGHWAY 7 HIGHWAY 8 HIGHWAY 9 RAILROAD 10 RAILROAD 11 RAILROAD 12 ROADWAY 13 ROADWAY 14 ROADWAY 15 HIGHWAY 16 ROADWAY 0' 20' 40' 60' 80' 100' 120' 140' 160' 180' 200' 220' 240' 0'500'1000' DS DS DS DS 45 3 41 42 44 43 30 29 118 117 116 28 53 124 127 128 52 49 129 51 130 47 50 151 152 134 153 63 60 59 75 62 58 57 56 55 80 91 92 31 32 67 71 72 70 68 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 7 DEPARTURE SURFACES - PLAN & PROFILE CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ D E P A R T U R E S U R F A C E S . D W G 9/ 3 0 / 2 0 2 2 9 : 4 4 : 1 4 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 1000 2000 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE / Y E A R (JAN 202 0 ) DS RW 16 EL. 24' RW 34 EL. 32' RW 16 EL. 24' RW 34 EL. 32' NO.DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 40 RUNWAY LIGHT 25.18 24.00 1.18 TBS NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 3 BLAST FENCE 42.64 32.00 7.40 TBS 28 ROADWAY 46.99 31.99 7.49 TBS 29 ROADWAY 45.84 30.84 7.27 TBS 30 ROADWAY 45.79 30.79 7.71 TBS 31 ROADWAY 46.60 31.60 2.13 TBS 32 ROADWAY 44.74 29.74 1.55 TBS 41 BLAST FENCE 44.83 32.00 9.58 TBS 42 BLAST FENCE 43.31 32.00 7.26 TBS 43 ACCESS ROAD 41.60 31.60 4.23 TBS 44 ACCESS ROAD 41.13 31.13 3.75 TBS 45 ACCESS ROAD 41.11 31.11 3.74 TBS 47 BUILDING 46.79 30.00 4.84 TBS 49 BUILDING 46.90 30.00 5.98 TBS 50 BUILDING 50.91 30.00 8.47 TBS 51 POLE 45.33 30.00 3.77 TBS 52 BUILDING 47.76 30.00 7.39 TBS 53 SIGN 41.70 30.00 1.38 TBS 55 POLE 64.55 30.00 14.35 TBS 56 POLE 64.18 30.00 14.34 TBS 57 POLE 63.35 30.00 14.00 TBS 58 POLE 64.88 30.00 16.05 TBS 59 BUILDING 58.59 30.00 10.17 TBS 60 BUILDING 51.33 30.00 3.95 TBS 62 BUILDING 50.54 30.00 1.48 TBS NO. DESCRIPTION TOP ELEVATION GROUND ELEVATION PENETRATION DISPOSITION 63 POLE 54.93 30.00 7.09 TBS 67 BUILDING 47.63 30.00 2.61 TBS 68 BUILDING 46.65 30.00 1.84 TBS 70 BUILDING 51.88 30.00 4.52 TBS 71 BUILDING 49.43 30.00 2.07 TBS 72 BUILDING 49.38 30.00 2.94 TBS 75 BUSH 47.76 30.00 1.71 TBS 80 BUILDING 53.36 30.00 4.59 TBS 91 BUILDING 56.69 30.00 3.67 TBS 92 BUILDING 59.65 30.00 8.75 TBS 116 LIGHTPOLE 47.72 30.00 9.12 TBS 117 LIGHTPOLE 47.58 30.00 9.23 TBS 118 LIGHTPOLE 47.21 30.00 9.23 TBS 124 LIGHTPOLE 55.81 30.00 15.59 TBS 127 LIGHTPOLE 56.00 30.00 15.77 TBS 128 LIGHTPOLE 56.55 30.00 16.03 TBS 129 SIGN 45.61 30.00 4.36 TBS 130 LIGHTPOLE 56.46 30.00 15.41 TBS 134 UTILITY 63.86 30.00 19.56 TBS 151 UTILITY 60.35 30.00 17.13 TBS 152 UTILITY 65.20 30.00 21.45 TBS 153 UTILITY 54.61 30.00 10.86 TBS 155 TREE 293.46 165.20 47.95 TBS 156 TREE 259.43 177.98 1.90 TBS RUNWAY 16 DEPARTURE SURFACE SECTION 1 SLOPE 40:1 RUNWAY 16 DEPARTURE SURFACE SECTION 2 SLOPE 40:1 RUNWAY 34 DEPARTURE SURFACE SECTION 1 SLOPE 40:1 RUNWAY 34 DEPARTURE SURFACE SECTION 2 SLOPE 40:1 RUNWAY 34 DEPARTURE SURFACE SECTION 2 RUNWAY 34 DEPARTURE SURFACE SECTION 1 RUNWAY 16 DEPARTURE SURFACE SECTION 2 RUNWAY 16 DEPARTURE SURFACE SECTION 1 RW 34 EL. 32' RUNWAY 16 DEPARTURE SURFACE DETAIL 00 500 1000 TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW.TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW. TBS = TO BE FURTHER STUDIED IN FUTURE AIRSPACE REVIEW. Figure E7 Departure Surfaces Plan & Profile E.9 TOFA TOFA TOFA TO F A TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3 4 5 8 9 11 12 14 15 16 17 43 44 10 6 13 ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA TOFA 89' TWY 25' R500 45 TWY 40' TWY 35' 30 0 ' 30 0 ' BRL BRL BRL BRL BRL BRL BRL X X X X X X X X X X X X X X X X X X X X X X X X X X GATE T S A T O F A T S A T O F A TO F A TOFA TOFA TSA TS A TSA TS A TOF A TOF A TOF A TWY 40' TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A T S A TWY 41' TSA TSA TSATOF A TOF ATWY 40' TWY 40' RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TWY 75' H T O F A T O F A TO F A T O F A T S A T S A TSA T S A 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 8 TERMINAL AREA PLAN CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ T E R M I N A L A R E A P L A N . D W G 9/ 3 0 / 2 0 2 2 9 : 4 8 : 4 6 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 100 200 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) 870' 19 3 ' 13 1 ' 493'536' 13 9 ' 19 0 ' 356' EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA P77 TSS Figure E8 Terminal Area Plan E.10 ㄯ㈷⼲㘠健渠☠䥮欠啰摡瑥 PROPOSED ATCT - SITE 1A PROPOSED ATCT - SITE 1C PROPOSED ATCT - SITE 1D 46 47 48 6/16/26 Pen & Ink Update2 22 2 140' 112' 122' TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA BRL BRL BRL BRL BRL BRL BRL BRL BRL 15 16 17 18 20 21 22 24 35 37 38 36 34 28 32 33 39 23 40 41 42 19 ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA RO F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA BLAST FENCE BLAST FENCE BLAST FENCE BLAST FENCE TOFA 131' TWY 50' RSA 150'OFA 500' TOFA 115' TWY 50' TOFA 115' TWY 50' DT = 340' 200' TWY 35' TWY 60'35 0 ' 30 0 ' BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 27 P77 P77 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X BLAST FENCE GATE GATE V-11 GATE GATE PED GATE TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TO F A TS A TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TO F A TO F A TS A TS A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSATOF A TOF ATWY 40'TWY 50' TO F A TO F A TWY 50' RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA 25 26 TSS TSS TSS TSS TS S TSS TSS TSS TSS TS S 200' TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TO F A TO F A TO F A TO F A TO F A TO F A TO F A TO F A TO F A TO F A BLAST FENCE TOFA X T O F A T O F A TO F A T O F A T S A T S A TSA T S A TOFA 131' 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 9 SOUTH AREA PLAN CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ T E R M I N A L A R E A P L A N . D W G 9/ 3 0 / 2 0 2 2 9 : 4 9 : 2 5 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 100 200 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) 1546' 21 0 ' 953' 15 8 ' 13 1 ' F1 F2 300' EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA P77 TSS Figure E9 South Area Plan E.11 TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A TL O F A ㄯ㈷⼲㘠健渠☠䥮欠啰摡瑥 1 1 PROPOSED ATCT - SITE 1A PROPOSED ATCT - SITE 1C PROPOSED ATCT - SITE 1D 48 46 47 6/16/26 Pen & Ink Update2 2 2 140' 112' 122' BRL BRL BRL BRL BRL BRL 3 4 5 8 9 11 10 2 6 1 RO F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA RA M P WILL ROGERS WILEY POST MEMORIAL BRL P77 P77 P77 P77 P77 P77 P77 P77 X X X X X X X X X X X X X X GATE GATE TO F A TO F A P7 7 RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA TSS TSS TSS TSS TSS TSS TSS TSS TS S TS S TSS TSS TSS TSS TSS TSS TSS TSS TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA T O F A TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA T S A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA T S A TSA TSA TSA TSA TSA TSA TSA TSA TSA TWY 75' 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 10 NORTH AREA PLAN REH JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ T E R M I N A L A R E A P L A N . D W G 9/ 3 0 / 2 0 2 2 9 : 5 0 : 0 7 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 100 200 15°34''E MAG. DEC.± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA P77 TSS 131' 29 3 ' 50' Figure E10 North Area Plan E.12 XX X X 1 1 1/27/26 Pen & Ink Update ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ ROFZ TOFA TOFA TOFA TOFA TOFA TOFA TOFATOFATOFATOFATOFATOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 3 4 5 8 9 11 12 14 15 16 17 18 20 21 22 24 35 37 38 36 34 28 32 33 39 43 44 23 40 10 2 41 42 6 13 19 1 R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA RA M P BLAST FENCE BLAST FENCE BLAST FENCE BLAST FENCE WILL ROGERS WILEY POST MEMORIAL TOFA 115' TWY 50' TOFA 115' TWY 50' TOFA 89' TWY 25' R500 45 TWY 40' TWY 35' TWY 60' BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL 27 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 P77 BLAST FENCE TS A TO F A TS A TOF A TOFA TSATSATOF A TOF A TWY 40' TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TS A TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TWY 41' TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TOF A TWY 40' TWY 40' TWY 50' TWY 50' P7 7 RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA 25 26 TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA T O F A TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TOFA TO F A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TS A TSA TSA TSA TSA TSA TSA TSA TSA TSA TSA TWY 75' BLAST FENCE H T O F A TOF A TO F A T S A TOFA 131' 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 11 AIRPORT LAND USE PLAN CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ L A N D U S E P L A N . D W G 9/ 3 0 / 2 0 2 2 9 : 5 2 : 1 0 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 300 600 15°34''E MAG. DEC. ± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA RENTON KING COUNTY RENTON KING COUNTY CHURCH CHURCH PARK SCHOOL STADIUM RU N W A Y P R O T E C T I O N Z O N E IN N N E R S A F E T Y Z O N E INN E R T U R N I N G Z O N E TRA F F I C P A T T E R N Z O N E IN N E R T U R N I N G Z O N E TR A F F I C P A T T E R N Z O N E RU N W A Y P R O T E C T I O N Z O N E IN N N E R S A F E T Y Z O N E IN N E R T U R N I N G Z O N E TR A F F I C P A T T E R N Z O N E INN E R T U R N I N G Z O N E TRA F F I C P A T T E R N Z O N E RENTON RENTON RENTON Figure E11 Airport Land Use Plan E.13 BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA R O F A ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA ROFA RA M P WILL ROGERS WILEY POST MEMORIAL BRL BRL BRL BRL BRL BRL BRL BRL BRL BRL X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X GATE GATE GATE GATE V-11 GATE GATEPED GATE RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA RSA H X 61 6 W P E R I M E T E R R O A D SHEET CONTENTS DO NOT SCALE DRAWINGS M&H NO.: DATE: DESIGNED BY: DRAWN BY: CHECKED BY: ISSUED These documents shall not be used for any purpose or project for which it is not intended. Mead & Hunt shall be indemnified by the client and held harmless and defended from all claims, damages, liabilities, losses, and expenses, including attorneys' fees and costs, arising out of such misuse or reuse of the documents. In addition, unauthorized reproduction of these documents, in part or as a whole, is prohibited. SHEET NO. Mead and Hunt, Inc. 1743 Wazee Street, Suite 400 Denver, CO 80202 phone: 303-825-8844 meadhunt.com 12 AIRPORT PROPERTY MAP CAL JWB M&H \\ C O R P . M E A D H U N T . C O M \ S H A R E D F O L D E R S \ E N T P \ 3 0 8 9 6 0 0 \ 1 3 0 6 5 9 . 0 6 \ T E C H \ C A D \ D R A W I N G S \ A L P _ U P D A T E \ A I R P O R T P R O P E R T Y M A P . D W G 9/ 3 0 / 2 0 2 2 9 : 5 4 : 1 2 A M NOT FOR CONSTRUCTION RE N T O N M U N I C I P A L A I R P O R T AI R P O R T L A Y O U T P L A N U P D A T E 3089600-130659.06 JUNE 2022 RE N T O N , W A 9 8 0 5 7 00 300 600 15°34''E MAG. DEC. ± 0°24' 0°6' W CHANGE/YEAR (JAN 2020) EXISTINGDESCRIPTION ROFZ FUTURE TOFA TSA AV EA 1 Figure E12 Airport Property Map E.14 Renton Municipal Airport | ATCT Siting Study Report 62 Renton Municipal Airport | ATCT Siting Study Report 65