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HomeMy WebLinkAboutCarMax_TIR_FINAL 12082016.pdf CarMax Auto Superstores 3751 E. Valley Road Renton, Washington, 98057 FINAL Technical Information Report Commercial Redevelopment Revised December 2016 1505 Westlake Ave. N T 206.522.9510 Suite 305 F 206.522.8344 Seattle, WA 98109 www.pacland.com Prepared By: Willis Liu Reviewed By: Bill Fortunato, P.E. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 1 Section Page Executive Summary ..................................................................................................................................................... 2 Section 1- Project Overview .................................................................................................................................... 4 1. TIR Worksheet ................................................................................................................................................... 4 2. Site Location....................................................................................................................................................... 9 3. Drainage Basins, Site Characteristics, and Subbasins ....................................................................... 10 4. Soils ..................................................................................................................................................................... 12 Section 2- Conditions and Requirements Summary ................................................................................. 12 Section 3- Offsite Analysis ..................................................................................................................................... 16 1. Upstream Analysis ......................................................................................................................................... 16 2. Downstream Analysis ................................................................................................................................... 16 3. Conclusion ........................................................................................................................................................ 20 Section 4- Flow Control and Water Quality Facility Analysis and Design .................................... 20 1. Hydrologic Analysis ....................................................................................................................................... 20 2. Existing Site Hydrology ................................................................................................................................ 20 3. Developed Site Hydrology .......................................................................................................................... 22 4. Flow Control Analysis ................................................................................................................................... 23 5. Water Quality System ................................................................................................................................... 23 6. New PGIS ........................................................................................................................................................... 23 Section 5- Conveyance System Analysis and Design ................................................................................ 24 1. Conveyance ...................................................................................................................................................... 24 2. 100 Year Flood/Overflow Condition ....................................................................................................... 25 Section 6- Special Reports and Studies ........................................................................................................... 25 Section 7- Other Permits ......................................................................................................................................... 26 Section 8- CSWPPP Analysis and Design ........................................................................................................ 26 Section 9- Bond Quantities, Facility Summaries, and Declaration of Covenant ......................... 28 Section 10- Operations and Maintenance Manual .................................................................................... 28 Appendices: A – Exhibits / Grading and Drainage Plan B – Act III Theaters Drainage Report C – Design Calculations D – Operations and Maintenance Manual E – Bond Quantities Worksheet and Declaration of Covenant F – Department of Ecology Construction Stormwater General Permit Coverage Letter Table of Contents CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 2 Site Location: The property is located at 3751 E. Valley Road in Renton, Washington. The site is bordered by SW 41st Street to the south, E. Valley Road to the east, a Harley-Davidson dealership to the north, and a medical and retail mixed-use building to the west. The site is currently developed as the Act III Movie Theater, which has a building footprint of 61,856 square feet, with associated parking and landscaping. A wetland and a stormwater detention and water quality facility is also located on the western 1.13 AC of the site. The entire lot is approximately 12.28 acres in size. This project proposes to demolish the existing theater and redevelop the site to become a used car dealership. The project site lies within the Lower Green River Subwatershed, which is part of the Green/Duwamish Watershed. It is in the City of Renton Black River drainage basin. The project site is located in the City of Renton Employment Area Valley Overlay District (Valley Community Planning area). A portion of the property is zoned IM (industrial medium) and the remainder of the property is zoned CA (commercial arterial). Design Criteria: The City of Renton uses the King County Surface Water Management Design Manual (KCSWDM), 2009 Edition, as adopted by the City of Renton and the City of Renton Amendments to the King County Surface Water Design Manual, dated February 2010. The existing site is developed and entirely impervious with the exception of landscape islands and the existing wetland and stormwater facilities along the western property line. The overall impervious area will remain approximately the same, and additional required detention is not anticipated for this project. However, additional water quality treatment will be provided to meet the requirements of Core Requirement #8 as the project will increase the pollution generating impervious surface by more than 5,000 SF. Table 1 Jurisdictional Requirements Peak Runoff Control: Peak Rate Flow Control Standard Matching Existing Site Conditions 2-year: Match existing site conditions 10-year: Match existing site conditions 100-year: Match existing site conditions Water Quality: Enhanced Basic WQ Treatment Preceding detention 60% of the developed 2-year peak flow rate Downstream of detention The full 2-year release rate from detention facility Executive Summary CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 3 Proposed Drainage System: The project proposes to utilize the existing stormwater system for conveyance, water quality, detention, and flow control and provide improvements, as necessary, for additional conveyance and water quality treatment. Revisions to the stormwater system are anticipated to accommodate the new building configuration and regrading of the site. Conclusion: The proposed stormwater management system for this project has been designed in accordance with regulatory criteria described above and is consistent with sound engineering practice. The site has been analyzed to determine the requirements for detention and water quality treatment, and no significant adverse impacts to the stormwater management system are expected as a result of the proposed development. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 4 Figure 1 - Technical Information Worksheet (KCSWDM 2009) Section 1- Project Overview CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 5 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 6 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 7 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 8 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 9 Site Location Figure 2 - Site Location Location: 3751 E. Valley Road. Renton, WA 98057 Section/Township/Range: SW Quarter of Section 30, Township 23, Range 05 Parcel/Tax Lot(s): 1253600030 Size: 12.28 acres City, County, State: Renton, King County, Washington Governing Agency: City of Renton Design Criteria: 2009 King County Surface Water Design Manual (KCSWDM), and the City of Renton Amendments to the KCSWDM (February 2010) CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 10 Drainage Basins, Subbasins, and Site Characteristics Drainage Basin The project site is located in the Lower Green River Subwatershed, which is part of the Green/Duwamish Watershed. It is in the City of Renton Black River drainage basin. Existing Subbasins The following information is from Drainage Calculations for Act III Theaters, City of Renton, Washington, prepared by Brant O. Mercil, P.E. of Horton Dennis and Associates, revised August 8, 1996, the full report is included in Appendix B. “Runoff from the parking area in front of the proposed building [Act III Theaters] will be conveyed in a storm drain pipe system to a grass-lined swale in the proposed wetland buffer at the rear of the building. The swale has been designed with a flat slope to promote water quality through ponding prior to discharge into the detention basin. The swale will outfall into the first of three water quality ponds. These ponds have been designed using the methodologies for a combined water quality/detention basin as outlined in the 1992 edition of the King County Stormwater Management (SWM) Manual. While the above mentioned grass lined swale will provide some water quality benefits, site constraints precluded the design of a bio-filtration swale meeting the requirements of the King County SWM Manual. To compensate for use of a smaller swale, additional storage has been provided in the proposed water quality ponds. Additional water quality storage has also been provided to compensate for paved areas downstream of the proposed facility... The detention basin has been designed to release flows at or below the pre developed rates for the 2, 10 and 100 year storms per City of Renton standards…The control structure in the detention system will discharge to a 15-inch storm drain pipe. The storm drain pipe will extend approximately 450 feet west to a connection with an existing 60-inch storm drain pipe on the west side of Lind Avenue. The 60-inch storm drain pipe continues approximately 1300 feet north, then 1,000 feet east to an outfall in Springbrook Creek.” The design of the existing facilities used a single basin with a tributary area of 13.23 AC. This was estimated by starting with the project site area of 12.28 AC, subtracting 0.86 AC of bypass area, and adding 1.81 AC to include the offsite wetland mitigation area, offsite areas (former Home Base and warehouse), and the area of Lots 4 and 6 of the Northern Railroad BSP No. 014-92. The bypass areas include landscaped areas that drain offsite along the south and east edges of the property, a portion of the driveway access to SW 41st Street, and the driveway access to E. Valley Road on the north side of the property. Although the initial drainage report was developed using a single basin, the site can be analyzed more effectively by examining five subbasins. There are five outfalls that discharge into the grass-lined swale in the rear of the building that lead to the water quality ponds before entering detention basin and discharging at the control structure. Starting at the north end of the swale CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 11 and moving south, the first outfall discharges runoff from a half of the roof of the theater and approximately a third of the parking area in front of the building (Subbasin1). The next three outfalls each connect to single catch basins, capturing runoff from the parking area in the rear of the building (Subbasins 2, 3, 4). The southernmost outfall discharges runoff from the remaining portion of the roof, the southern portion of the parking area in front of the building, Lots 4 and 6, and the driveway access to the adjacent property to the west (Subbasin 5). See Appendix A Exhibit A- Existing Subbasin, detailing the subbasin characteristics, flow routes, and discharge points. Proposed Subbasins The proposed storm drainage system will be composed of the same approximate subbasins as the existing. See Appendix A Exhibit B- Proposed Subbasin, detailing the proposed subbasins. As shown in Table 2 – Site Areas, the impervious area is decreasing as a result of this development. Additional landscaping and a reduction in building square footage will allow for an increase in pervious areas. The areas below are based on the 12.28 acre project site since we are not proposing changes to the bypass, offsite wetland mitigation area, offsite areas, or the area of Lots 4 and 6 of the Northern Railroad BSP No. 014-92. Table 2 – Site Areas Existing Area (SF) Proposed Area (SF) Surface Roof 61,856 20,217 Landscaping (Pervious) 91,985 121,810 Wetland 7,808 7,808 Pond 27,350 27,350 Pavement (PGIS) 345,918 357,732 Total 534,917 534,917 Site Characteristics The property is located at 3751 E. Valley Road in Renton, Washington. The site is bordered by SW 41st Street to the south, E. Valley Road to the east, a Harley-Davidson dealership to the north, and a medical and retail mixed-use building to the west. The site is currently developed as the Act III Movie Theater, which has a building footprint of 61,856 square feet, with associated parking and landscaping. Two wetlands and a stormwater detention and water quality facility is also located on the western 1.13 AC of the site. The entire lot is approximately 12.28 acres in size. This project proposes to demolish the existing theater and redevelop the site to become a used car dealership. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 12 The proposed project will include the construction of four buildings, named as follows; Sales (11,138 SF), Service (6,137 SF), Carwash (919 SF), and Presentation (2,022 SF) for a total building area of 20,217 SF. The overall sales display parking area will be approximately 4.22 AC. The customer and employee parking area will be approximately 2.99 AC. Although the change in impervious surfaces (roof and pavement) is negligible the pollution generating impervious surface are will be increased. Water quality treatment will be provided for an area equivalent to the increase in pollution generating impervious surface. Soils Figure 3 - Site Soils (USDA SCS Soil Map) The site is mapped as Snohomish Silt Loam (So) and Tukwila Muck (Tu) according to the USDA Natural Resource Conservation Service, Soil Survey for King County Area, Washington. As required by the 2009 King County Surface Water Design Manual (KCSWDM) and City of Renton Amendment, this project is subject to a full drainage review. Therefore, the storm drainage design for this project is required to comply with all eight (8) Core Requirements, and six (6) Special Requirements. The requirements have been met as follows: Core Requirement #1: Discharge at Natural Location All surface and storm water runoff from a project must be discharged at the natural location so as not to be diverted onto or away from downstream properties. The manner in which runoff is Section 2- Conditions and Requirements Summary PROJECT SITE CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 13 discharged from the project site must not create a significant adverse impact to downhill properties or drainage systems. Response: Onsite runoff will be collected, conveyed and, when necessary, treated. All onsite runoff is subsequently conveyed to the City of Renton stormwater system. The city system discharges into Springbrook Creek (Black River). No downstream impacts are anticipated as a result of the proposed improvements as the impervious area will remain approximately the same. Core Requirement #2: Off-site Analysis All proposed projects must submit an offsite analysis report that assesses potential offsite drainage and water quality impacts associated with development of the project site and propose appropriate mitigation of those impacts. The initial permit submittal shall include, at minimum, a Level 1 downstream analysis. Response: See Section 3 of this report for the Level 1 downstream analysis prepared as part of this project. Per discussions with the City Engineer, as long as the project site does not increase the overall impervious area from its existing conditions, it is expected that there will be no adverse impacts to the downstream facilities because the developed peak flow rate leaving the developed site will be less than the existing peak flow rate. See Section 4 for further explanation. Core Requirement #3: Flow Control All proposed projects, including redevelopment projects, must provide onsite flow control facilities or flow control BMPs or both to mitigate the impacts of storm and surface runoff generated by new impervious surface, new pervious surface, and replaced impervious surface targeted for flow mitigation. Response: Per the exceptions listed in section1.2.3.1-A of the City of Renton Amendment to the KCSWDM the project is exempt from flow control requirements as it does not increase the 100- year peak flow and is not expected to significantly impact a critical area, or cause severe flooding or erosion problems. Due to the net decrease in impervious surfaces on the proposed site, the projected 100-year peak flows will be reduced. The proposed 12.28 acre site generates 4.84 cfs, a 0.17 cfs decrease in the 100-year peak flow rate from the existing site conditions. Therefore, additional flow control facilities, beyond the existing stormwater ponds and flow control structure, are not proposed as part of this project. A detailed summary and analysis of the existing and proposed conditions is provided in Section 4 of this report. Core Requirement #4: Conveyance System All engineered conveyance system elements for proposed projects must be analyzed, designed, and constructed to provide a minimum level of protection against overtopping, flooding, erosion, and structural failure. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 14 Response: Portions of the existing conveyance system will be reused as part of this project with additional conveyance added to accommodate the new building configuration and site layout. The proposed conveyance system has been designed to convey the 100-year peak flow. Core Requirement #5: Erosion and Sediment Control All proposed projects that will clear, grade, or otherwise disturb the site must provide erosion and sediment controls to prevent, to the maximum extent practicable, the transport of sediment from the project site to downstream drainage facilities, water resources, and adjacent properties. Both temporary and permanent ESC measures shall be implemented. Response: Erosion and sediment control requirements will be an integral part of the project construction documents. These measures will include methods to reduce erosion of onsite site soils and to prevent sediments from inadvertently leaving the project site. Additionally, the ESC measures will prevent sediment-laden discharge from entering the wetland or existing stormwater water quality or flow control facilities. Core Requirement #6: Maintenance and Operations Maintenance and operation of all drainage facilities is the responsibility of the property owner, except those facilities for which the City of Renton assumes maintenance and operation, and must be maintained and operated in accordance with King County or other maintenance standards as approved by the City of Renton. Response: An Operations and Maintenance Manual is included in this report- see Section 10. Core Requirement #7: Financial Guarantees and Liability In accordance with RMC 4-6-030J, RDSD shall require all persons constructing any surface water facilities (including flow control/water quality facilities, conveyance systems, erosion control, and road drainage), to post with the City of Renton a bond, assignment of funds or certified check. The applicant must also maintain liability insurance. Response: See Section 9- Bond Quantities, Facility Summaries, and Declaration of Covenant. The Site Improvement Bond Quantity Worksheet and Declaration of Covenant have been included in Appendix E. Core Requirement #8: Water Quality All proposed projects, including redevelopment projects, must provide water quality (WQ) facilities to treat the runoff from those new and replaced pollution-generating impervious surfaces and new pollution-generating pervious surfaces targeted for treatment. Response: The proposed project improvements will increase the pollution generating impervious surface (PGIS) by 1.0 AC. The site has existing water quality in place, the existing swale and water quality ponds, for 7.94 AC of PGIS. Enhanced Basic Treatment is required if more than 50% of the runoff that drains to the proposed treatment facility is from commercial land use. Additional CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 15 Enhanced Basic Water Quality treatment will be provided for the increase in PGIS. Additionally, an oil/water separator, which will discharge to the sanitary sewer system, will be provided for discharges from the service building and carwash. A detailed summary and analysis of the water quality basin and design is provided in Section 4 of this report. Special Requirement #1: Other Adopted Area-Specific Requirements The City of Renton may apply requirements for controlling drainage on an area-specific basis. Potential other adopted area-specific requirements may include: Master Drainage Plans, Basin Plans, Stormwater Compliance Plans, etc. Response: The project site is within Washington State Water Resource Inventory Area 9: Green/Duwamish and Central Puget Sound Watershed Salmon Habitat Recovery. However, the proposed project will have no effect on any salmon habitats. The project site does not lie within any City of Renton Master Drainage or Basin Plans. Special Requirement #2: Flood Hazard Area Delineation If a proposed project contains or is adjacent to a flood hazard area as determined by the Renton Department of Storm Drainage, the project must determine those components that are applicable and delineate them on the project’s site improvement plans and recorded maps. Response: The project site does not lie within or adjacent to a City of Renton Flood Hazard Area (determined by FEMA FIRM Panels 0978F and 0979F dated May 16, 1995) and therefore does not need to apply the provisions of this requirement. Special Requirement #3: Flood Protection Facilities Proper analysis, design, and construction are necessary to protect against the potentially catastrophic consequences if flood protection facilities such as levees and revetments should fail. Response: The proposed project will not rely on an existing flood protection facility, or modify or construct a new flood protection facility. Special Requirement #4: Source Control If a proposed project requires a commercial building or commercial site development permit then the water quality source controls applicable to the proposed project shall be applied in accordance with the King County Stormwater Pollution Prevention Manual and Renton Municipal Code IV. Response: Water quality source controls will be applied in accordance with the KCSWDM and Renton Municipal Code IV. A pollution prevention plan has been included in section 8 of this report. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 16 Special Requirement #5: Oil Control Projects proposing to develop or redevelop a high-use site must provide oil control in addition to other water quality controls required. Response: High use sites area defined as a commercial or industrial site that (1) has an expected average daily traffic count equal to or greater than 100 vehicles/1,000 SF of gross building area: (2) is subject to petroleum storage in excess of 1,500 gallons per year; (3) is subject to use, storage, or maintenance of a fleet of 25 or more diesel vehicles. The proposed development includes a 4,000 gallon, above ground fuel storage tank. Stormwater runoff from the high-use portion of the site will be treated to capture and detain oil and associated pollutants. Only the impervious surface associated with the high-use portion of the site is subject to treatment requirements. The site is considered high-use due to the anticipated storage/transfer of petroleum in excess of 1500 gallons per year. An oil water separator will be installed to ensure that the runoff from within the proposed service building and car wash. Special Requirement #6: Aquifer Protection Area If a proposed project is located within the Aquifer Protection Area as identified in the RMC 4-3- 050, this special requirement requires the project to determine those components that are applicable and delineate them on the project’s site improvement plans. Response: The project is not located within an Aquifer Protection Area, and therefore this requirement does not apply. Individual Lot BMP Requirements For projects on individual sites/lots, flow control BMPs must be selected and applied per the 2009 KCSWDM. If the proposed project is on a site/lot that is 22,000 sf or larger and will result in an impervious surface coverage of more than 45% of the site/lot, then flow control BMPs must be applied as specified in the 2009 KCSWDM. Response: For the purposes of Large Lot Low Impervious BMP requirements, the target impervious surface shall include all new impervious surface together with any existing impervious surface. Since the redevelopment project results in a net decrease of impervious surface area, the project is therefore exempt from needed to provide flow control BMPs. Upstream Analysis Based on topographic survey and field reconnaissance, there is minimal tributary area to this site. The original drainage report for the theater, completed by Horton Dennis & Associates lists a total of 1.53 AC offsite that contributes to the existing stormwater facility located onsite. City of Renton catch basins and inlets along E Valley Road along the eastern side of the site intercept Section 3- Off-Site Analysis CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 17 road runoff before it reaches the site. Additionally, the existing topography surrounding the site prevents any significant amount of run-on. Downstream Analysis After the runoff passes through the existing stormwater detention/treatment facilities, runoff enters the municipal stormwater system at Lind Avenue SW. This system continues north for approximately 1,300 feet, before heading west approximately 450 feet to the discharge point of Springbrook Creek. To meet the requirements of the Level 1 downstream analysis, the area up to one mile downstream of the project site must be included. One mile downstream (for this project, downstream is north) from the point where the stormwater leaves the project site is approximately at the intersection of SW 27th street and Springbrook Creek. As previously discussed, the storm runoff leaves the site near the southwest corner and enters in to the Renton Municipal storm system, before traveling along Lind Ave SW and SW 34th St. to the discharge point of Springbrook Creek. Springbrook Creek continues in a northerly direction for approximately 1.35 miles to the King County South Wastewater Treatment Plant. A site visit was conducted on the morning of January 10, 2014. All above ground facilities were examined on site including the wetland/stormwater detention area, catch basins, and swales. No drainage issues such as areas of ponding, overtopping of the detention area, and blocked inlets could be seen onsite. The analysis continued along Lind Ave SW and 34th Street before reaching Springbrook Creek. No drainage problems were observed. A map of the downstream analysis can be seen in Figure 4. Photos from the site visit are shown on the next page. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 18 Figure 4 - Downstream Area (Renton COR Maps) DISCHARGE POINT PROJECT SITE CITY OF RENTON STORM SYSTEM SPRINGBROOK CREEK ONSITE DETENTION/TREATMENT FACILITIES CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 19 # Photo Description 1 Drainage ditch (swale) on the north edge of the adjacent Lot 6 The runoff captured in this landscaped area is routed through a storm pipe connecting to a catch basin downstream, and then to the water quality treatment area in the rear (to the west) of the building. 2 In the front parking area, near the southeast corner of the building A series of catch basins located in the parking area are connected via underground stormwater pipes before being discharged into the swale and water quality treatment ponds in the rear of the building. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 20 # Photo Description 3 To the rear (west) of the theater One of three existing water quality treatment ponds. Stormwater is discharged into the upstream swale, before passing through the treatment ponds and connecting to the City of Renton municipal stormwater system. 4 Crossing of Springbrook Creek and 34th St This is the discharge point of the municipal stormwater system downstream of the site. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 21 Conclusion The existing downstream stormwater facilities have been analyzed and after discussions with the City Engineer, as long as the project site does not increase the overall impervious area from its existing conditions, it is expected that there will be no adverse impacts to the downstream facilities because the developed peak flow rate leaving the developed site will be less than the existing peak flow rate. See Section 4 for further explanation. The City of Renton Amendment to the KCSWDM applies flow control standards based on geographic areas as determined by the Flow Control Application Map. The project site lies within the Peak Rate Flow Control Standard – Matching Existing Conditions. This area requires peak runoff control within the Peak Rate Flow Control Standard area such that the post- developed peak rate matches that of the existing 2-year, 10-year and 100-year peak discharge rates. Also, if the proposed re-development is located within the Peak Rate Flow Control Standard Area, will not increase the existing condition 100-year peak flow greater than 0.1 cfs, and the increased runoff (if any) will not significantly impact a critical area, severe flooding problem, or sever erosion problem, then the facility requirement is waived. Hydrologic Analysis The existing and proposed site conditions were evaluated using both the King County Runoff Time Series (KCRTS) The detailed KCRTS output has been included in Appendix C – Design Calculations. The historic 1-hour duration in the Sea-Tac rainfall region (location scale factor ST-1.0) was used to model runoff in KCRTS. Existing Site Hydrology The existing site includes a storm drainage system designed to collect storm water at strategically placed catch basins throughout the site. The storm water is then conveyed through underground pipes to a swale at the rear of the building. After traveling through the one of the two swales, runoff enters the first of three water quality ponds. The water quality ponds discharge to the detention basin. Stormwater runoff discharges to the municipal stormwater system in Lind Avenue SW via the existing flow control structure which has a 15-inch outlet pipe. The municipal stormwater system routes to a discharge point of Springbrook Creek. The existing detention basin was designed to release flows at or below the pre-developed rates for the 2, 10, and 100 year storms. The pre-developed conditions and existing peak runoff rates for the project site area are shown in Tables 4 and 5 below. Existing peak runoff rates were determined using the King County Runoff Time Series modeling software and the calculations can be found in Appendix C. Section 4- Flow Control and Water Quality Facility Analysis and Design CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 22 Table 4 Pre-Developed (Existing) Conditions Area Condition 7.94 AC Pavement (PGIS) 2.74 AC Landscape/Wetland 1.42 AC Roof Table 5 Existing Peak Runoff Rate Event Rate (cfs) 2-year 2.54 10-year 3.03 100-year 5.01 Current As-Built Conditions Additionally, the City has requested that the current as-built conditions of the existing stormwater facilities be provided in order to verify that the existing facilities still meet the approved design volumes. The only available resource to determine current storage volumes within the existing grass-lined swales and wetponds is the project survey which contains contours and elevations for these existing facilities. The methodology utilized in AutoCAD Civil 3D to compute this volume was by creating a TIN volume surface for the extents of the existing ponds/swales. A TIN volume surface provides an exact difference between a base and comparison surface, so by comparing the elevation differences between the top of pond elevation (20.0’ NAVD 88) and the contours of the pond, AutoCAD Civil 3D computes a “fill volume” that effectively represents the available storage capacity of said pond. See “Existing Swale and Wetpond Volumes” in Appendix C for the methodology process to determine output values generated in AutoCAD Civil 3D. The resulting storage volume was then compared to the design volumes provided in the Act III Theater Drainage Report, prepared by Horton Dennis & Associates, Inc., dated August 8, 1996 – See Appendix B. Table 6 provides a breakdown between the originally designed wetpond volumes for water quality and detention versus the computed storage volume based off of the current project survey. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 23 Table 6 Existing Stormwater Facility Volumes Required WQ Storage Volume (CF) Provided WQ Storage Volume (CF) Provided Detention Storage Volume (CF) Act III Theater Drainage Report 17,775 27,350 85,300 Current Conditions (per project survey) --- --- 79,326 Given the limited resources at hand with the project survey contours and elevations, the computed overall storage volume of the existing swales and wetponds was still found to be nearly 95% of what was originally provided based on the Act III Theater Drainage Report. It is reasonable to assume that the existing facilities as of today still meet the approved design volumes, given the appropriate range of accuracy of both volumes as well as the methodology utilized. Additionally, the next few sections of this report will further emphasize how peak flows from the developed condition of the site will decrease in comparison to the existing condition due to the reduction in impervious areas, thereby ensuring that the existing facilities should still operate according to their approved design. Developed Site Hydrology The proposed project will have similar hydrology to the existing site. It is anticipated that the existing systems (conveyance, detention, and treatment) will be utilized as the overall site hydrology and division of subbasins will remain approximately the same. The amount of pervious area is increasing due to a reduction in building size and additional landscaping, however the site PGIS will be increased as a result of the decrease in building size. The post- developed conditions and un-detained peak runoff rates for the entire attributed basin area (12.28 acres) are shown in Tables 6 and 7 below. Developed peak runoff rates were determined using the King County Runoff Time Series modeling software and the calculations can be found in Appendix C. Table 6 Post-Developed Conditions Area Condition 8.22 AC Pavement (PGIS) 3.60 AC Landscape/Wetland 0.46 AC Roof CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 24 Table 7 Developed Peak Runoff Rate Event Rate (cfs) 2-year 2.43 10-year 2.91 100-year 4.84 Flow Control Analysis The post developed 100-year peak runoff rate for the overall site decreases by 0.17 cfs from the existing condition. Because the project is located in the Peak Rate Flow Control Standard area and does not increase its developed 100-year peak runoff rate, any additional flow control facility requirement is waived for this project. The existing flow control facilities consist of the following structures inside of a 54-inch diameter catch basin manhole; a 1-inch diameter orifice with an outlet elevation of 10.87, a 3.5-inch diameter orifice with an outlet elevation of 15.00, a 6-inch diameter elbow with an outlet elevation of 15.50, and a 15-inch diameter restrictor with an overflow elevation of 16.50. The control structure discharges to a 15-inch storm drain pipe before connecting into the Renton Municipal storm system. See Appendix B for the Act III Theater Drainage Report, which includes illustrations and calculations for the existing flow control system. Water Quality System The proposed redevelopment includes demolition of the existing theater; construction of the sales, service, car wash, and presentation buildings, reconfigurations of landscape islands and repaving of the existing parking area. The roofs of the proposed buildings will be considered non pollution-generating impervious surfaces (NPGIS). While the overall impervious area of the site will be reduced as part of this project, the amount of pollution-generating impervious surfaces (PGIS) will be increasing since the existing building footprint will be replaced with new PGIS. There are two existing grass-lined biofiltration swales which discharge to three water quality ponds in series. The swales and water quality ponds were sized for the existing impervious area, as detailed by the drainage report by Horton Davis and Associates. The project will add 0.28 AC of new PGIS. This is more than 5,000 SF of new PGIS; therefore additional water quality treatment will be provided. Two Modular Wetland Stormwater Biofiltration Systems are proposed to meet the Enhanced Basic Water requirement in King County Surface Water Design Manual. The Enhanced basic treatment will be provided for the increased PGIS. New PGIS Areas The new PGIS is a result of the revisions to the site layout and the reduced building size. It is not possible to collect the exact area of new PGIS however the majority of the new PGIS, located CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 25 within the existing building footprint, will be treated. There are two Water Quality Basins within the proposed vehicle storage area and will be greater in size than the increase in the new PGIS. The total area in the proposed Water Quality Basins is 1.14 AC. Exhibit 3 - Water Quality Basin in Appendix A depicts the area to be treated. Tables 8 and 9, below, contain the developed conditions of each treatment basins as well as the water quality design flow rate (60% of the developed 2-year peak flow rate, as determined using the KCRTS model with 15-minute time steps). This water quality design flow rate was provided to Modular Wetlands in order for them to size the proposed treatment facilities. Sizing criteria and design of the Modular Wetlands structures is provided in Appendix C. Table 8 Water Quality Basins Basin Area Condition A 0.68 AC Pavement (PGIS) 0 AC Landscape/Wetland 0 AC Roof B 0.46 AC Pavement (PGIS) 0 AC Landscape/Wetland 0 AC Roof Table 9 Water Quality Flow Rates and Facility Sizing Basin Event Rate (cfs) MWS-L-8-8-V (Structure 21) Treatment Flow Rate (cfs) MWS-L-6-8-V (Structure 26) Treatment Flow Rate (cfs) A 2-year 0.32 60% of 2-year 0.19 0.204 B 2-year 0.22 60% of 2-year 0.13 0.142 Conveyance Per the 2009 King County Surface Water Design Manual, Section 4.2.1.2, the on-site stormwater conveyance can be calculated based on gravity flow analysis of the piping network. Peak run-off associated with and up to a 25-year storm event has been determined to be adequate. Uniform flow analysis utilizing Manning’s equation, shown below, was employed with a Manning’s Roughness Coefficient (n) of 0.012. Section 5- Conveyance System Analysis and Design CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 26 Manning’s equation - Q=n49.1 xAxR2/3xS1/2 With: Q = Flow (CFS) n = Manning’s Roughness Coefficient (0.012) A = Flow Area (SF) R = Hydraulic Radius = Area /Wetted Perimeter (LF) S = Slope of the pipe (ft/ft) Based on the revised basin areas and existing pipe sizes, the existing conveyance system is adequate for the 25-year storm event. All new conveyance pipes will also be designed to convey the 25-year storm event. Additionally, the overflow from a 100-year storm event will not create or aggravate a severe flooding problem or severe erosion problem. See Appendix C for conveyance design calculations. 100-Year Flood/Overflow Condition Review of the current FEMA FIRM maps (Panels 0978F, 0979 F) indicates that the project site lies within the Zone X, which is determined to be outside of the 100-year flood plain. If the existing storm system were to experience a major storm event, the stormwater detention area would overflow in to the rear access drive, and along the road westerly towards Lind Ave SW. The stormwater system for this project has been designed to address the storm events in accordance with design criteria described previously. In the event of a larger storm, it is unlikely that the system would fail. Based on a review of the site and immediate surroundings, the overflow of the stormwater conveyance system would allow surface water to sheet flow to the public storm system in Lind Avenue. The following Special Reports and Studies were used or have been completed for this project:  Drainage Calculations for Act III Theaters, City of Renton, Washington- dated August 8, 1996 by Horton Dennis & Associates Inc.  Report for Detailed Wetland Mitigation Plan, presented to Act III Theaters, City of Renton, Washington- dated September 16, 1996 by W & H Pacific.  Wetland Study – dated approximately December 1991 by David Evans and Associates, Inc.  Geotechnical Investigation- by Zipper Geo Associates  FEMA FIRM Panels 0978F and 0979F dated May 16, 1995  Wetland Study - by H & S Consultants Section 6- Special Reports and Studies CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 27 The following governmental approvals or permits will likely be required for this project:  City of Renton SEPA Determination  City of Renton Site Plan Review  City of Renton Building Permit  City of Renton Construction Permit  City of Renton Demolition Permit  Washington State Department of Ecology, NOI Coverage under the NPDES Permit. A copy of the Permit Coverage Letter is provided in Appendix F. These permits will require approval by the City of Renton Planning Division or the Department of Ecology. All erosion and sediment control measures shall be governed by the requirements of the City of Renton and the Washington State Department of Ecology. A temporary erosion and sedimentation control plan will be prepared to assist the contractor in complying with these requirements. The Erosion and Sediment Control (ESC) plan will be included with the construction plans. 1. Erosion Risk Assessment The degree of erosion risk on the proposed project site is minimal. The following factors contribute to a low degree of erosion risk:  Slope across the site is minimal. Runoff will not travel at high velocities across the site and, therefore, will not cause noticeable erosion impacts.  The site consists primarily of impervious surfaces. 2. Construction Sequence and Procedure The proposed development will include an erosion/sedimentation control plan designed to prevent sediment-laden run-off from leaving the site during construction. The erosion potential of the site is influenced by four major factors: soil characteristics, vegetative cover, topography, and climate. Erosion/sedimentation control is achieved by a combination of structural measures, cover measures, and construction practices that are tailored to fit the specific site. Prior to the start of any grading activity upon the site, all erosion control measures, including stabilized construction entrances, shall be installed in accordance with the construction documents. Section 8- CSWPPP Analysis and Design Section 7- Other Permits CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 28 The best construction practice will be employed to properly clear and grade the site and to schedule construction activities. The planned construction sequence for the construction of the site is as follows: 1. Attend a pre-construction meeting with the City of Renton. 2. Install temporary erosion control features. 3. Demolish existing structure(s). 4. Clear and grub expansion area. 5. Grade site. 6. Construct buildings. 7. Pave site and install landscaping. 8. Remove temporary erosion control features once site is fully stabilized. 3. Trapping Sediment Structural control measures will be used to reduce erosion and retain sediment on the construction site. The control measures will be selected to fit specific site and seasonal conditions. The following structural items will be used to control erosion and sedimentation processes:  Stabilized construction entrances  Filter fabric fences  Catch Basin Inlet Sediment Protection  Proper Cover measures  Temporary sediment pond with emergency overflow spillway Weekly inspection of the erosion control measures will be required during construction. Any sediment buildup shall be removed and disposed of off-site. A stabilized construction entrance will be installed at the site entrance to avoid vehicle tracking off mud off-site. The entrances are a minimum requirement and may be supplemented if tracking of mud onto public streets becomes excessive. In the event that mud is tracked off site, it shall be swept up and disposed of off site on a daily basis. Depending on the amount of tracked mud, a vehicle road sweeper may be required. The sizing information for the temporary sediment pond and the emergency spillway can be found in Appendix C. Because vegetative cover is the most important form of erosion control, construction practices must adhere to stringent cover requirements. More specifically, the contractor will not be allowed to leave soils open for more than 14 days and, in some cases, immediate seeding will be required. 4. Wet Season TESC Operating Plan Work between October 1st and April 30th must adhere to the Wet Season Special Provisions noted in the 2009 KCSWDM. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Page 29 The following items have been submitted to the City as part of the civil permit submittal:  Declaration of Covenant for Privately Maintained Flow Control BMPs and WQ Facilities  Bond Quantities Worksheet See Appendix E for a copy of the Bond Quantities Worksheet and the Declaration of Covenant for Privately Maintained Flow Control BMPs and WQ Facilities A manual detailing the operations and maintenance for all privately-maintained flow control and water quality facilities has been prepared and can be found in Appendix D. This manual will also include Appendix A of the KCSWDM (Maintenance Requirements for Flow Control, Conveyance, and WQ Facilities). Section 10- Operations and Maintenance Manual Section 9- Bond Quantities, Facility Summaries, and Declaration of Covenant CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix A – Exhibits CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 EXHIBIT A – EXISTING SUBBASIN CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 EXHIBIT B – PROPOSED SUBBASIN CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 EXHIBIT C – WATER QUALITY BASIN CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix B – Act III Theaters Drainage Report CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix C – Design Calculations CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 PRE-DEVELOPED CONDITIONS PRE-DEVELOPED PEAK FLOW RATES CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 DEVELOPED CONDITIONS DEVELOPED PEAK FLOW RATES CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 EXISTING SWALE AND WETPOND VOLUMES Project Survey Contour and Elevations CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 AutoCAD Civil 3D TIN Volume Surface Comparison (Top of Pond Elevation = 20.0’) CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 TIN Volume Surface Computation Computed “Fill” Volume = Storage Volume of Combined Wetponds and Swales 2,938 CY * 27 CF / 1 CY = 79,326 CF Required Storage Volume for Water Quality (Page 13 of Act III Theater Drainage Report – Appendix B) = 17,775 CF Volume of Storage Provided for 100-Year Storm Event (Page 3 of Act III Theater Drainage Report - Appendix B) = 85,300 CF CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 WATER QUALITY BASIN A CONDITIONS WATER QUALITY BASIN A PEAK FLOW RATES CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 WATER QUALITY BASIN B CONDITIONS WATER QUALITY BASIN B PEAK FLOW RATES CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 MODULAR WETLANDS SIZING CRITERIA FOR STRUCTURES 21 & 26 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Conveyance Design Calculations Manning’s equation: Q=n49.1 xAxR2/3xS1/2 With: Q = Flow (CFS) n = Manning’s Roughness Coefficient (0.012) A = Flow Area (SF) R = Hydraulic Radius = Area /Wetted Perimeter (LF) S = Slope of the pipe (ft/ft) 8” Pipe @ 0.5% slope: Q=n 49.1 xAxR2/3xS1/2 = 1.00 CFS n = 0.012 A = 0.333 (SF) R = 0.200 @ 95% full S = 0.005 12” Pipe @ 0.5% slope: Q=n 49.1 xAxR2/3xS1/2 = 2.95 CFS n = 0.012 A = 0.750 (SF) R = 0.300 @ 95% full S = 0.005 12” Pipe @ 1.3% slope: Q=n 49.1 xAxR2/3xS1/2 = 4.44 CFS n = 0.012 A = 0.750 (SF) R = 0.300 @ 95% full S = 0.0113 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix D – Operations and Maintenance Manual CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Maintain Stormwater Facilities The owner or operator of the project shall be responsible for maintaining the stormwater facilities in accordance with local requirements. Proper maintenance is important for adequate functioning of the stormwater facilities. The following maintenance program is recommended for this project: King County Surface Water Design Manual CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix E – Bond Quantities Worksheet and Declaration of Covenant LEGAL DESCRIPTION     (PER CHICAGO TITLE COMPANY ORDER NO. 1354998 DATED NOVEMBER 17, 2014)    LOT 3, BURLINGTON NORTHERN, A BINDING SITE PLAN, (BSP‐014‐92) ACCORDING TO THE PLAT THEREOF, RECORDED IN VOLUME 161 OF PLATS, PAGES 8 THROUGH  11, INCLUSIVE, IN KING COUNTY, WASHINGTON,    EXCEPT THAT PORTION OF LOT 3, OF SAID BINDING SITE PLAN, LYING NORTH OF A  LINE DESCRIBED AS FOLLOWS:    BEGINNING AT A POINT ON THE EASTERLY LINE OF LOT 3 THAT IS 23.80 FEET SOUTH OF THE NORTHEAST CORNER OF LOT 3, OF SAID BINDING SITE PLAN, THENCE  NORTH 88°09'51" WEST A DISTANCE OF 875.52 FEET, MORE OR LESS, TO A POINT ON THE WESTERLY LINE OF SAID LOT 3 AND THE TERMINUS OF THIS DESCRIPTION,  SAID POINT  OF TERMINUS BEING 80.88 FEET SOUTH OF THE ORIGINAL NORTHWEST CORNER OF LOT 3; ALSO KNOWN AS NEW LOT 3 OF CITY OF RENTON LOT LINE  ADJUSTMENT NUMBER LUA‐94‐157‐LLA, RECORDED UNDER KING COUNTY RECORDING NUMBER 9511299006; SITUATED IN THE CITY OF RENTON, COUNTY OF  KING, STATE OF WASHINGTON.    Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430‐7200Date Prepared: Name:PE Registration No:Firm Name:Firm Address:Phone No.Email Address:Project Name: Project Owner:CED Plan # (LUA): Phone:CED Permit # (U):Address: Site Address:Street Intersection: Addt'l Project Owner:Parcel #(s): Phone:Address: Clearing and grading greater than or equal to 5,000 board feet of timber? Yes/No:NOWater Service Provided by:If Yes, Provide Forest Practice Permit #:Sewer Service Provided by: SITE IMPROVEMENT BOND QUANTITY WORKSHEETPROJECT INFORMATIONCITY OF RENTONCITY OF RENTON1 Select the current project status/phase from the following options:              For Approval ‐ Preliminary Data Enclosed, pending approval from the City;              For Construction ‐ Estimated Data Enclosed, Plans have been approved for contruction by the City;              Project Closeout ‐ Final Costs and Quantities Enclosed for Project Close‐out SubmittalPhoneEngineer Stamp Required (all cost estimates must have original wet stamp and signature)Clearing and Grading Utility ProvidersN/AProject Location and Description Project Owner InformationRenton CarMaxRichmond, VA 23238‐11151253600030CarMax Auto Superstore West CoastLUA15‐000288 804‐747‐042212/7/2016Prepared by:FOR APPROVALProject Phase 1bfortunato@pacland.comBill Fortunato37679PACLAND1505 Westlake Ave N, Ste. 305, Seattle, WA206‐522‐95103751 East Valley Rd12800 Tuckahoe Creek Parkway Additional Project OwnerSW 41st St & East Valley RdU16003156AddressAbbreviated Legal Description:See attached document for legal description. City, State, ZipPage 2 of 14Ref 8‐H Bond Quantity WorksheetSECTION I PROJECT INFORMATIONUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156UnitReference # Price Unit Quantity CostBackfill & compaction‐embankmentESC‐16.50$                                            CYCheck dams, 4" minus rockESC‐2SWDM 5.4.6.380.00$                                          EachCatch Basin ProtectionESC‐335.50$                                          Each 401,420.00Crushed surfacing 1 1/4" minusESC‐4WSDOT 9‐03.9(3)95.00$                                          CYDitchingESC‐59.00$                                            CYExcavation‐bulkESC‐62.00$                                            CYFence, siltESC‐7SWDM 5.4.3.11.50$                                            LFFence, Temporary (NGPE)ESC‐81.50$                                            LF 277415.50Geotextile FabricESC‐92.50$                                            SYHay Bale Silt TrapESC‐100.50$                                            EachHydroseedingESC‐11SWDM 5.4.2.40.80$                                            SYInterceptor Swale / DikeESC‐121.00$                                            LFJute MeshESC‐13SWDM 5.4.2.23.50$                                            SYLevel SpreaderESC‐141.75$                                            LFMulch, by hand, straw, 3" deepESC‐15SWDM 5.4.2.12.50$                                            SYMulch, by machine, straw, 2" deepESC‐16SWDM 5.4.2.12.00$                                            SYPiping, temporary, CPP, 6"ESC‐1712.00$                                          LFPiping, temporary, CPP, 8"ESC‐1814.00$                                          LFPiping, temporary, CPP, 12"ESC‐1918.00$                                          LFPlastic covering, 6mm thick, sandbaggedESC‐20SWDM 5.4.2.34.00$                                            SYRip Rap, machine placed; slopesESC‐21WSDOT 9‐13.1(2)45.00$                                          CYRock Construction Entrance, 50'x15'x1'ESC‐22SWDM 5.4.4.11,800.00$                                    EachRock Construction Entrance, 100'x15'x1'ESC‐23SWDM 5.4.4.13,200.00$                                    EachSediment pond riser assemblyESC‐24SWDM 5.4.5.22,200.00$                                    EachSediment trap, 5'  high berm ESC‐25SWDM 5.4.5.119.00$                                          LFSed. trap, 5' high, riprapped spillway berm section ESC‐26SWDM 5.4.5.170.00$                                          LFSeeding, by handESC‐27SWDM 5.4.2.41.00$                                            SYSodding, 1" deep, level groundESC‐28SWDM 5.4.2.58.00$                                            SYSodding, 1" deep, sloped groundESC‐29SWDM 5.4.2.510.00$                                          SYTESC SupervisorESC‐30110.00$                                       HRWater truck, dust controlESC‐31SWDM 5.4.7140.00$                                       HRUnitReference # Price Unit Quantity Cost10.00$                                          LF 3503,500.00EROSION/SEDIMENT SUBTOTAL: 5,335.50SALES TAX @ 9.5% 506.87EROSION/SEDIMENT TOTAL: 5,842.37(A)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR EROSION & SEDIMENT CONTROLDescription No.(A)Straw wattlesWRITE‐IN‐ITEMS Page 3 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.a EROSION_CONTROLUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostGENERAL ITEMS Backfill & Compaction‐ embankment GI‐16.00$             CYBackfill & Compaction‐ trench GI‐29.00$             CYClear/Remove Brush, by hand (SY) GI‐31.00$             SYBollards ‐ fixed GI‐4 240.74$         Each 5112,277.74Bollards ‐ removable GI‐5 452.34$         EachClearing/Grubbing/Tree Removal GI‐6 10,000.00$   AcreExcavation ‐ bulk GI‐72.00$             CYExcavation ‐ Trench GI‐85.00$             CYFencing, cedar, 6' high GI‐9 20.00$           LFFencing, chain link, 4' GI‐10 38.31$           LFFencing, chain link, vinyl coated,  6' high GI‐11 20.00$           LF 2775,540.00Fencing, chain link, gate, vinyl coated,  20' GI‐12 1,400.00$     EachFill & compact ‐ common barrow GI‐13 25.00$           CYFill & compact ‐ gravel base GI‐14 27.00$           CYFill & compact ‐ screened topsoil GI‐15 39.00$           CYGabion, 12" deep, stone filled mesh GI‐16 65.00$           SYGabion, 18" deep, stone filled mesh GI‐17 90.00$           SYGabion, 36" deep, stone filled mesh GI‐18 150.00$         SYGrading, fine, by hand GI‐19 2.50$             SYGrading, fine, with grader GI‐20 2.00$             SYMonuments, 3' Long GI‐21 250.00$         EachSensitive Areas Sign GI‐22 7.00$             EachSodding, 1" deep, sloped ground GI‐23 8.00$             SYSurveying, line & grade GI‐24 850.00$         DaySurveying, lot location/lines GI‐25 1,800.00$     AcreTopsoil Type A (imported) GI‐26 28.50$           CYTraffic control crew ( 2 flaggers )GI‐27 120.00$         HRTrail, 4" chipped wood GI‐28 8.00$             SYTrail, 4" crushed cinder GI‐29 9.00$             SYTrail, 4" top course GI‐30 12.00$           SYConduit, 2" GI‐31 5.00$             LFWall, retaining, concrete GI‐32 55.00$           SFWall, rockery GI‐33 15.00$           SFSUBTOTAL THIS PAGE:17,817.74(B)(C)(D)(E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B) (C)Page 4 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B) (C)ROAD IMPROVEMENT/PAVEMENT/SURFACINGAC Grinding, 4' wide machine < 1000sy RI‐1 30.00$           SYAC Grinding, 4' wide machine 1000‐2000sy RI‐2 16.00$           SYAC Grinding, 4' wide machine > 2000sy RI‐3 10.00$           SYAC Removal/Disposal RI‐4 35.00$           SYBarricade, Type III ( Permanent )RI‐5 56.00$           LFGuard Rail RI‐6 30.00$           LFCurb & Gutter, rolled RI‐7 17.00$           LF 206335,071.00Curb & Gutter, vertical RI‐8 12.50$           LF 311238,900.00Curb and Gutter, demolition and disposal RI‐9 18.00$           LFCurb, extruded asphalt RI‐10 5.50$             LFCurb, extruded concrete RI‐11 7.00$             LFSawcut, asphalt, 3" depth RI‐12 1.85$             LFSawcut, concrete, per 1" depth RI‐13 3.00$             LFSealant, asphalt RI‐14 2.00$             LFShoulder, gravel, 4" thick RI‐15 15.00$           SYSidewalk, 4" thick RI‐16 38.00$           SY 321,216.00Sidewalk, 4" thick, demolition and disposal RI‐17 32.00$           SYSidewalk, 5" thick RI‐18 41.00$           SYSidewalk, 5" thick, demolition and disposal RI‐19 40.00$           SYSign, Handicap RI‐20 85.00$           Each 8680.00Striping, per stall RI‐21 7.00$             Each 8015,607.00Striping, thermoplastic, ( for crosswalk )RI‐22 3.00$             SFStriping, 4" reflectorized line RI‐23 0.50$             LFAdditional 2.5" Crushed Surfacing RI‐24 3.60$             SYHMA 1/2" Overlay 1.5" RI‐25 14.00$           SYHMA 1/2" Overlay 2" RI‐26 18.00$           SYHMA Road, 2", 4" rock, First 2500 SY RI‐27 28.00$           SYHMA Road, 2", 4" rock, Qty. over 2500SY RI‐28 21.00$           SYHMA Road, 4", 6" rock, First 2500 SY RI‐29 45.00$           SYHMA Road, 4", 6" rock, Qty. over 2500 SY RI‐30 37.00$           SYHMA Road, 4", 4.5" ATB RI‐31 38.00$           SYGravel Road, 4" rock, First 2500 SY RI‐32 15.00$           SYGravel Road, 4" rock, Qty. over 2500 SY RI‐33 10.00$           SYThickened Edge RI‐34 8.60$             LFSUBTOTAL THIS PAGE:81,474.00(B)(C)(D)(E)Page 5 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR STREET AND SITE IMPROVEMENTSQuantity Remaining (Bond Reduction) (B) (C)PARKING LOT SURFACING No.2" AC, 2" top course rock & 4" borrow PL‐1 21.00$           SY2" AC,  1.5"  top course & 2.5" base course PL‐2 28.00$           SY4" select borrow PL‐35.00$             SY1.5" top course rock & 2.5" base course PL‐4 14.00$           SYSUBTOTAL PARKING LOT SURFACING:(B)(C)(D)(E)LANDSCAPING & VEGETATION No.Street Trees LA‐1Median Landscaping LA‐25.00$             SF 714335,715.00Right‐of‐Way Landscaping LA‐3Wetland Landscaping LA‐4SUBTOTAL LANDSCAPING & VEGETATION:35,715.00(B)(C)(D)(E)TRAFFIC & LIGHTING No.Signs TR‐1Street Light System ( # of Poles) TR‐2 1,150.00$     Each 103118,450.00Traffic Signal TR‐3Traffic Signal Modification TR‐4SUBTOTAL TRAFFIC & LIGHTING:118,450.00(B)(C)(D)(E)WRITE‐IN‐ITEMSHeavy Duty Pavement (4" AC over 4" Base) 38.00$           SY 83731,806.00Concrete Pavement (6" concrete over 4" base) 28.00$           SY 942,632.00SUBTOTAL WRITE‐IN ITEMS:34,438.00STREET AND SITE IMPROVEMENTS SUBTOTAL: 287,894.74SALES TAX @ 9.5% 27,350.00STREET AND SITE IMPROVEMENTS TOTAL: 315,244.74(B)(C)(D)(E)Page 6 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.b TRANSPORTATIONUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostDRAINAGE (CPE = Corrugated Polyethylene Pipe, N12 or Equivalent) For Culvert prices, Average of 4' cover was assumed. Assume perforated PVC is same price as solid pipe.) Access Road, R/D D‐1 26.00$            SY* (CBs include frame and lid)Beehive D‐2 90.00$            EachThrough‐curb Inlet Framework D‐3 400.00$          EachCB Type ID‐4 1,500.00$      Each 1319,500.00CB Type IL D‐5 1,750.00$      EachCB Type II, 48" diameter D‐6 2,300.00$      Each     for additional depth over 4'    D‐7 480.00$          FTCB Type II, 54" diameter D‐8 2,500.00$      Each     for additional depth over 4' D‐9 495.00$          FTCB Type II, 60" diameter D‐10 2,800.00$      Each     for additional depth over 4' D‐11 600.00$          FTCB Type II, 72" diameter D‐12 6,000.00$      Each     for additional depth over 4' D‐13 850.00$          FTCB Type II, 96" diameter D‐14 14,000.00$    Each     for additional depth over 4' D‐15 925.00$          FTTrash Rack, 12" D‐16 350.00$          EachTrash Rack, 15" D‐17 410.00$          EachTrash Rack, 18" D‐18 480.00$          EachTrash Rack, 21" D‐19 550.00$          EachCleanout, PVC, 4" D‐20 150.00$          EachCleanout, PVC, 6" D‐21 170.00$          Each 61,020.00Cleanout, PVC, 8" D‐22 200.00$          EachCulvert, PVC, 4" (Not allowed in ROW)D‐23 10.00$            LF 130113,010.00Culvert, PVC, 6" (Not allowed in ROW)D‐24 13.00$            LFCulvert, PVC,  8" (Not allowed in ROW)D‐25 15.00$            LFCulvert, PVC, 12" (Not allowed in ROW)D‐26 23.00$            LF 119327,439.00Culvert, PVC, 15" (Not allowed in ROW)D‐27 35.00$            LFCulvert, PVC, 18" (Not allowed in ROW)D‐28 41.00$            LFCulvert, PVC, 24" (Not allowed in ROW)D‐29 56.00$            LFCulvert, PVC, 30" (Not allowed in ROW)D‐30 78.00$            LFCulvert, PVC, 36" (Not allowed in ROW)D‐31 130.00$          LFCulvert, CMP, 8" D‐32 19.00$            LFCulvert, CMP, 12" D‐33 29.00$            LFSUBTOTAL THIS PAGE:60,969.00(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B) (C)Page 7 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B) (C)DRAINAGE (Continued)Culvert, CMP, 15" D‐34 35.00$            LFCulvert, CMP, 18" D‐35 41.00$            LFCulvert, CMP, 24" D‐36 56.00$            LFCulvert, CMP, 30" D‐37 78.00$            LFCulvert, CMP, 36" D‐38 130.00$          LFCulvert, CMP, 48" D‐39 190.00$          LFCulvert, CMP, 60" D‐40 270.00$          LFCulvert, CMP, 72" D‐41 350.00$          LFCulvert, Concrete, 8" D‐42 42.00$            LFCulvert, Concrete, 12" D‐43 48.00$            LFCulvert, Concrete, 15" D‐44 78.00$            LFCulvert, Concrete, 18" D‐45 48.00$            LFCulvert, Concrete, 24" D‐46 78.00$            LFCulvert, Concrete, 30" D‐47 125.00$          LFCulvert, Concrete, 36" D‐48 150.00$          LFCulvert, Concrete, 42" D‐49 175.00$          LFCulvert, Concrete, 48" D‐50 205.00$          LFCulvert, CPE, 6" (Not allowed in ROW)D‐51 14.00$            LFCulvert, CPE, 8" (Not allowed in ROW)D‐52 16.00$            LFCulvert, CPE, 12" (Not allowed in ROW)D‐53 24.00$            LFCulvert, CPE, 15" (Not allowed in ROW)D‐54 35.00$            LFCulvert, CPE, 18" (Not allowed in ROW)D‐55 41.00$            LFCulvert, CPE, 24" (Not allowed in ROW)D‐56 56.00$            LFCulvert, CPE, 30" (Not allowed in ROW)D‐57 78.00$            LFCulvert, CPE, 36" (Not allowed in ROW)D‐58 130.00$          LFCulvert, LCPE, 6" D‐59 60.00$            LFCulvert, LCPE, 8" D‐60 72.00$            LFCulvert, LCPE, 12" D‐61 84.00$            LFCulvert, LCPE, 15" D‐62 96.00$            LFCulvert, LCPE, 18" D‐63 108.00$          LFCulvert, LCPE, 24" D‐64 120.00$          LFCulvert, LCPE, 30" D‐65 132.00$          LFCulvert, LCPE, 36" D‐66 144.00$          LFCulvert, LCPE, 48" D‐67 156.00$          LFCulvert, LCPE, 54" D‐68 168.00$          LFSUBTOTAL THIS PAGE:(B) (C) (D) (E)Page 8 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B) (C)DRAINAGE (Continued)Culvert, LCPE, 60" D‐69 180.00$          LFCulvert, LCPE, 72" D‐70 192.00$          LFCulvert, HDPE, 6" D‐71 42.00$            LFCulvert, HDPE, 8" D‐72 42.00$            LFCulvert, HDPE, 12" D‐73 74.00$            LFCulvert, HDPE, 15" D‐74 106.00$          LFCulvert, HDPE, 18" D‐75 138.00$          LFCulvert, HDPE, 24" D‐76 221.00$          LFCulvert, HDPE, 30" D‐77 276.00$          LFCulvert, HDPE, 36" D‐78 331.00$          LFCulvert, HDPE, 48" D‐79 386.00$          LFCulvert, HDPE, 54" D‐80 441.00$          LFCulvert, HDPE, 60" D‐81 496.00$          LFCulvert, HDPE, 72" D‐82 551.00$          LFPipe, Polypropylene, 6" D‐83 84.00$            LFPipe, Polypropylene, 8" D‐84 89.00$            LFPipe, Polypropylene, 12" D‐85 95.00$            LFPipe, Polypropylene, 15" D‐86 100.00$          LFPipe, Polypropylene, 18" D‐87 106.00$          LFPipe, Polypropylene, 24" D‐88 111.00$          LFPipe, Polypropylene, 30" D‐89 119.00$          LFPipe, Polypropylene, 36" D‐90 154.00$          LFPipe, Polypropylene, 48" D‐91 226.00$          LFPipe, Polypropylene, 54" D‐92 332.00$          LFPipe, Polypropylene, 60" D‐93 439.00$          LFPipe, Polypropylene, 72" D‐94 545.00$          LFCulvert, DI, 6" D‐95 61.00$            LFCulvert, DI, 8" D‐96 84.00$            LFCulvert, DI, 12" D‐97 106.00$          LF 73678,016.00Culvert, DI, 15" D‐98 129.00$          LFCulvert, DI, 18" D‐99 152.00$          LFCulvert, DI, 24" D‐100 175.00$          LFCulvert, DI, 30" D‐101 198.00$          LFCulvert, DI, 36" D‐102 220.00$          LFCulvert, DI, 48" D‐103 243.00$          LFCulvert, DI, 54" D‐104 266.00$          LFCulvert, DI, 60" D‐105 289.00$          LFCulvert, DI, 72" D‐106 311.00$          LFSUBTOTAL THIS PAGE:78,016.00(B) (C) (D) (E)Page 9 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B) (C)Specialty Drainage ItemsDitching SD‐19.50$              CYFlow Dispersal Trench    (1,436 base+) SD‐3 28.00$            LF French Drain  (3' depth) SD‐4 26.00$            LFGeotextile, laid in trench, polypropylene SD‐53.00$              SYMid‐tank Access Riser, 48" dia,  6' deep SD‐6 2,000.00$      EachPond Overflow Spillway SD‐7 16.00$            SYRestrictor/Oil Separator, 12" SD‐8 1,150.00$      EachRestrictor/Oil Separator, 15" SD‐9 1,350.00$      EachRestrictor/Oil Separator, 18" SD‐10 1,700.00$      EachRiprap, placed SD‐11 42.00$            CYTank End Reducer (36" diameter) SD‐12 1,200.00$      EachInfiltration pond testing SD‐13 125.00$          HRPermeable Pavement SD‐14Permeable Concrete Sidewalk SD‐15Culvert, Box      __ ft  x  __ ft SD‐16SUBTOTAL SPECIALTY DRAINAGE ITEMS:(B) (C) (D) (E)STORMWATER FACILITIES (Include Flow Control and Water Quality Facility Summary Sheet and Sketch)Detention Pond SF‐1Each Detention Tank SF‐2Each Detention Vault SF‐3Each Infiltration Pond SF‐4Each Infiltration Tank SF‐5Each Infiltration Vault SF‐6Each Infiltration Trenches SF‐7Each Basic Biofiltration Swale SF‐8Each Wet Biofiltration Swale SF‐9Each Wetpond SF‐10 Each Wetvault SF‐11 Each Sand Filter SF‐12 Each Sand Filter Vault SF‐13 Each Linear Sand Filter SF‐14 Each StormFilter SF‐15 Each Rain Garden SF‐16 Each SUBTOTAL STORMWATER FACILITIES:(B) (C) (D) (E)Page 10 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostSITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR DRAINAGE AND STORMWATER FACILITIESQuantity Remaining (Bond Reduction) (B) (C)WRITE‐IN‐ITEMSMWS 6' X 8'‐VWI‐1 40,000.00$    Each 140,000.00MWS 8' X 8'‐VWI‐2 45,000.00$    Each 145,000.00WI‐3WI‐4WI‐5WI‐6WI‐7WI‐8WI‐9WI‐10WI‐11WI‐12WI‐13WI‐14WI‐15SUBTOTAL WRITE‐IN ITEMS:85,000.00DRAINAGE AND STORMWATER FACILITIES SUBTOTAL: 145,969.00SALES TAX @ 9.5% 13,867.06DRAINAGE AND STORMWATER FACILITIES TOTAL: 159,836.06(B) (C) (D) (E)Page 11 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.c DRAINAGEUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostConnection to Existing Watermain W‐1 2,000.00$     EachDuctile Iron Watermain, CL 52, 4 Inch Diameter W‐2 50.00$           LFDuctile Iron Watermain, CL 52, 6 Inch Diameter W‐3 56.00$           LF 31017,360.00Ductile Iron Watermain, CL 52, 8 Inch Diameter W‐4 60.00$           LFDuctile Iron Watermain, CL 52, 10 Inch Diameter W‐5 70.00$           LFDuctile Iron Watermain, CL 52, 12 Inch Diameter W‐6 80.00$           LFGate Valve, 4 inch Diameter W‐7 500.00$         EachGate Valve, 6 inch Diameter W‐8 700.00$         Each 21,400.00Gate Valve, 8 Inch Diameter W‐9 800.00$         EachGate Valve, 10 Inch Diameter W‐10 1,000.00$     EachGate Valve, 12 Inch Diameter W‐11 1,200.00$     EachFire Hydrant Assembly W‐12 4,000.00$     Each 14,000.00Permanent Blow‐Off Assembly W‐13 1,800.00$     EachAir‐Vac Assembly,  2‐Inch Diameter W‐14 2,000.00$     EachAir‐Vac Assembly,  1‐Inch Diameter W‐15 1,500.00$     EachCompound Meter Assembly 3‐inch Diameter W‐16 8,000.00$     EachCompound Meter Assembly 4‐inch Diameter W‐17 9,000.00$     EachCompound Meter Assembly 6‐inch Diameter W‐18 10,000.00$   EachPressure Reducing Valve Station 8‐inch to 10‐inch W‐19 20,000.00$   EachWATER SUBTOTAL:22,760.00SALES TAX @ 9.5% 2,162.20WATER TOTAL: 24,922.20(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR WATERQuantity Remaining (Bond Reduction) (B) (C)Page 12 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.d WATERUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 CED Permit #:U16003156Existing Future Public PrivateRight‐of‐Way Improvements Improvements(D)(E)Description No. Unit Price Unit Quant. Cost Quant. Cost Quant. Cost Quant. CostClean Outs SS‐1 1,000.00$     Each 55,000.00Grease Interceptor, 500 gallon SS‐2 8,000.00$     EachGrease Interceptor, 1000 gallon SS‐3 10,000.00$   EachGrease Interceptor, 1500 gallon SS‐4 15,000.00$   EachSide Sewer Pipe, PVC. 4 Inch Diameter SS‐5 80.00$           LFSide Sewer Pipe, PVC. 6 Inch Diameter SS‐6 95.00$           LF 37035,150.00Sewer Pipe, PVC, 8 inch Diameter SS‐7 105.00$         LF 68071,400.00Sewer Pipe, PVC, 12 Inch Diameter SS‐8 120.00$         LFSewer Pipe, DI, 8 inch Diameter SS‐9 115.00$         LFSewer Pipe, DI, 12 Inch Diameter SS‐10 130.00$         LFManhole, 48 Inch Diameter SS‐11 6,000.00$     Each 16,000.00424,000.00Manhole, 54 Inch Diameter SS‐13 6,500.00$     EachManhole, 60 Inch Diameter SS‐15 7,500.00$     EachManhole, 72 Inch Diameter SS‐17 8,500.00$     EachManhole, 96 Inch Diameter SS‐19 14,000.00$   EachPipe, C‐900, 12 Inch Diameter SS‐21 180.00$         LFOutside Drop SS‐24 1,500.00$     LSInside Drop SS‐25 1,000.00$     LSSewer Pipe, PVC, ____ Inch Diameter SS‐26Lift Station (Entire System) SS‐27 LSSANITARY SEWER SUBTOTAL:6,000.00 135,550.00SALES TAX @ 9.5% 570.00 12,877.25SANITARY SEWER TOTAL: 6,570.00 148,427.25(B) (C) (D) (E)SITE IMPROVEMENT BOND QUANTITY WORKSHEETFOR SANITARY SEWERQuantity Remaining (Bond Reduction) (B) (C)Page 13 of 14Ref 8‐H Bond Quantity WorksheetSECTION II.e SANITARY SEWERUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 Planning Division |1055 South Grady Way – 6th Floor | Renton, WA 98057 (425) 430‐7200Date:Name:Project Name: PE Registration No:CED Plan # (LUA):Firm Name:CED Permit # (U):Firm Address:Site Address:Phone No.Parcel #(s):Email Address:Project Phase: Site Restoration/Erosion Sediment Control Subtotal (a) (a)5,842.37$                                                       Existing Right‐of‐Way Improvements Subtotal (b) (b)6,570.00$                                                       Future Public Improvements Subtotal (c) (c)‐$                                                                 Stormwater & Drainage Facilities Subtotal (d) (d)159,836.06$                                                  Bond Reduction (Quantity Remaining)2(e) (e)‐$                                                                 Site RestorationCivil Construction PermitMaintenance Bond33,281.21$                                                     Bond Reduction2Construction Permit Bond Amount 3Minimum Bond Amount is $10,000.001 Estimate Only  ‐ May involve multiple and variable components, which will be established on an individual basis by Development Engineering.2 The City of Renton allows one request only for bond reduction prior to the maintenance period. Reduction of not more than 70% of the original bond amount, provided that the remaining 30% willcover all remaining items to be constructed. 3 Required Bond Amounts are subject to review and modification by Development Engineering.* Note: The word BOND as used in this document means any financial guarantee acceptable to the City of Renton.** Note: All prices include labor, equipment, materials, overhead and profit. T(P +R ‐ S)Prepared by:Project InformationCONSTRUCTION BOND AMOUNT */**(prior to permit issuance)206‐522‐9510bfortunato@pacland.comRenton CarMaxLUA15‐0002883751 East Valley Rd1253600030FOR APPROVALU160031561505 Westlake Ave N, Ste. 305, Seattle, WA258,372.64$                                              P (a) x 150%SITE IMPROVEMENT BOND QUANTITY WORKSHEET BOND CALCULATIONS12/7/2016Bill Fortunato37679PACLANDR((b)+(c)+(d)) x 150%EST1((b) + (c) + (d)) x 20%‐$                                                             MAINTENANCE BOND */**(after final acceptance of construction)5,842.37$                                                  6,570.00$                                                  249,609.08$                                              8,763.56$                                                  ‐$                                                             ‐$                                                             159,836.06$                                              S(e) x 150%Page 14 of 14Ref 8‐H Bond Quantity WorksheetSECTION III. BOND WORKSHEETUnit Prices Updated: 06/14/2016Version: 06/14/2016Printed 12/12/2016 RECORDING REQUESTED BY AND WHEN RECORDED MAIL TO: CITY CLERK’S OFFICE CITY OF RENTON 1055 SOUTH GRADY WAY RENTON, WA 98057 DECLARATION OF COVENANT FOR MAINTENANCE AND INSPECTION OF FLOW CONTROL BMPS Grantor: Grantee: City of Renton Legal Description: Additional Legal(s) on: Assessor's Tax Parcel ID#: IN CONSIDERATION of the approved City of Renton(check one of the following) ‰residential building permit, ‰commercial building permit, ‰clearing and grading permit, ‰subdivision permit, or ‰short subdivision permit for Application File No. LUA/SWP ____________________ relating to the real property ("Property") described above, the Grantor(s), the owner(s) in fee of that Property, hereby covenants(covenant) with City or Renton, a political subdivision of the state of Washington, that he/she(they) will observe, consent to, and abide by the conditions and obligations set forth and described in Paragraphs 1 through 8 below with regard to the Property. Grantor(s) hereby grants(grant), covenants(covenant), and agrees(agree) as follows: 1. Grantor(s) or his/her(their) successors in interest and assigns ("Owners") shall retain, uphold, and protect the stormwater management devices, features, pathways, limits, and restrictions, known as flow control best management practices ("BMPs"), shown on the approved Flow Control BMP Site Plan for the Property attached hereto and incorporated herein as Exhibit A. 2. The Owners shall at their own cost, operate, maintain, and keep in good repair, the Property's BMPs as described in the approved Design and Maintenance Details for each BMP attached hereto and incorporated herein as Exhibit B. 3. City or Renton shall provide at least 30 days written notice to the Owners that entry on the Property is planned for the inspection of the BMPs. After the 30 days, the Owners shall allow the City of Renton to enter for the sole purpose of inspecting the BMPs. In lieu of inspection by the City, the Owners may elect to engage a licensed civil engineer registered in the state of Washington who has expertise in drainage to inspect the BMPs and provide a written report describing their condition. If the engineer option is chosen, the Owners shall provide written notice to the City of Renton within fifteen days of receiving the City's notice of inspection. Within 30 days of giving this notice, the Owners, or the engineer on behalf of the Owners, shall provide the engineer's report to the City of Renton. If the report is not provided in a timely manner as specified above, the County may inspect the BMPs without further notice. 4. If the City determines from its inspection, or from an engineer's report provided in accordance with Paragraph 3, that maintenance, repair, restoration, and/or mitigation work is required for the BMPs, The City shall notify the Owners of the specific maintenance, repair, restoration, and/or mitigation work (Work) required under RMC 4-6-030. The City shall also set a reasonable deadline for completing the Work or providing an engineer's report that verifies completion of the Work. After the deadline has passed, the Owners shall allow the City access to re-inspect the BMPs unless an engineer's report has been provided verifying completion of the Work. If the work is not completed properly within the time frame set by the City, the City may initiate an enforcement action. Failure to properly maintain the BMPs is a violation of RMC 4-6-030 and may subject the Owners to enforcement under the RMC 1-3, including fines and penalties. 5. Apart from performing routine landscape maintenance, the Owners are hereby required to obtain written approval from the City or Renton before performing any alterations or modifications to the BMPs. 6. Any notice or approval required to be given by one party to the other under the provisions of this Declaration of Covenant shall be effective upon personal delivery to the other party, or after three (3) days from the date that the notice or approval is mailed with delivery confirmation to the current address on record with each Party. The parties shall notify each other of any change to their addresses. 7. This Declaration of Covenant is intended to promote the efficient and effective management of surface water drainage on the Property, and it shall inure to the benefit of all the citizens of the City of Renton and its successors and assigns. This Declaration of Covenant shall run with the land and be binding upon Grantor(s), and Grantor's(s') successors in interest and assigns. 8. This Declaration of Covenant may be terminated by execution of a written agreement by the Owners and the City of Renton that is recorded by King County in its real property records. LEGAL DESCRIPTION (PER (PER CHICAGO TITLE COMPANY ORDER NO. 1354998 DATED NOVEMBER 17, 2014) LOT 3, BURLINGTON NORTHERN, A BINDING SITE PLAN, (BSP-014-92) ACCORDING TO THE PLAT THEREOF, RECORDED IN VOLUME 161 OF PLATS, PAGES 8 THROUGH 11, INCLUSIVE, IN KING COUNTY, WASHINGTON, EXCEPT THAT PORTION OF LOT 3, OF SAID BINDING SITE PLAN, LYING NORTH OF A LINE DESCRIBED AS FOLLOWS: BEGINNING AT A POINT ON THE EASTERLY LINE OF LOT 3 THAT IS 23.80 FEET SOUTH OF THE NORTHEAST CORNER OF LOT 3, OF SAID BINDING SITE PLAN, THENCE NORTH 88°09'51" WEST A DISTANCE OF 875.52 FEET, MORE OR LESS, TO A POINT ON THE WESTERLY LINE OF SAID LOT 3 AND THE TERMINUS OF THIS DESCRIPTION, SAID POINT OF TERMINUS BEING 80.88 FEET SOUTH OF THE ORIGINAL NORTHWEST CORNER OF LOT 3; ALSO KNOWN AS NEW LOT 3 OF CITY OF RENTON LOT LINE ADJUSTMENT NUMBER LUA-94-157-LLA, RECORDED UNDER KING COUNTY RECORDING NUMBER 9511299006; SITUATED IN THE CITY OF RENTON, COUNTY OF KING, STATE OF WASHINGTON. CHICAGO TITLE COMPANY ORDER NO. 1354998 DATED NOVEMBER 17, 2014) LOT 3, BURLINGTON NORTHERN, A BINDING SITE PLAN, (BSP-014-92) ACCORDING TO THE PLAT THEREOF, RECORDED IN VOLUME 161 OF PLATS, PAGES 8 THROUGH 11, INCLUSIVE, IN KING COUNTY, WASHINGTON, EXCEPT THAT PORTION OF LOT 3, OF SAID BINDING SITE PLAN, LYING NORTH OF A LINE DESCRIBED AS FOLLOWS: BEGINNING AT A POINT ON THE EASTERLY LINE OF LOT 3 THAT IS 23.80 FEET SOUTH OF THE NORTHEAST CORNER OF LOT 3, OF SAID BINDING SITE PLAN, THENCE NORTH 88°09'51" WEST A DISTANCE OF 875.52 FEET, MORE OR LESS, TO A POINT ON THE WESTERLY LINE OF SAID LOT 3 AND THE TERMINUS OF THIS DESCRIPTION, SAID POINT OF TERMINUS BEING 80.88 FEET SOUTH OF THE ORIGINAL NORTHWEST CORNER OF LOT 3; ALSO KNOWN AS NEW LOT 3 OF CITY OF RENTON LOT LINE ADJUSTMENT NUMBER LUA-94-157-LLA, RECORDED UNDER KING COUNTY RECORDING NUMBER 9511299006; SITUATED IN THE CITY OF RENTON, COUNTY OF KING, STATE OF WASHINGTON. Exhibit A Exhibit B CarMax Auto Superstores 3751 E. Valley Road Renton, Washington, 98057 Operations and Maintenance Manual October 2016 1505 Westlake Ave. N T 206.522.9510 Suite 305 F 206.522.8344 Seattle, WA 98109 www.pacland.com Prepared By: Willis Liu Reviewed By: Bill Fortunato, P.E. CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Maintain Stormwater Facilities The owner or operator of the project shall be responsible for maintaining the stormwater facilities in accordance with local requirements. Proper maintenance is important for adequate functioning of the stormwater facilities. The following maintenance program is recommended for this project: King County Surface Water Design Manual CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 Appendix F – Department of Ecology Construction Stormwater General Permit Coverage Letter CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003 CarMax Auto Superstores Technical Information Report Renton, Washington PACLAND Project #10507003