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HomeMy WebLinkAboutSR_HEX_Staff_Report_Exhibits_Talbot_Hill_Substation_Current_Limiting_Reactors_FINAL_190702DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Project Location Map HEX Report A. REPORT TO THE HEARING EXAMINER Hearing Date: July 9, 2019 Project File Number: PR19-000212 Project Name: Talbot Hill Substation Current Limiting Reactors Land Use File Number: LUA19-000097, CUP-H, SA, ECF, SF Project Manager: Angelea Weihs, Associate Planner Owner: Puget Sound Energy, Inc.; PO Box 97034, EST 4W, Bellevue, WA 98009-9734 Applicant/Contact: Kerry Kriner, Puget Sound Energy, PO Box 97034, EST 4W, Bellevue, WA 98009- 9734 Project Location: 2400 S Puget Drive Project Summary: Puget Sound Energy (PSE) is requesting a Hearing Examiner Conditional Use Permit, Site Plan Review, and a Special Fence Permit for proposed Talbot Hill Substation improvements located at 2400 S Puget Dr. (parcel number 2023059066). The project site totals 13.4 acres and is zoned Residential-8 (R-8). PSE is proposing to install six Current Limiting Reactors (CLRs) within a fenced enclosure adjacent to the existing Talbot Hill Substation. The proposed CLRs are large, highly customized coils that are each supported by three insulators. For safety and security purposes, the CLRs will also be installed on elevated pedestals with foundations, and enclosed by an eight foot security fence. A new 190-foot long by 85-foot wide gravel pad will be constructed to support the CLRs and the enclosure. The equipment will be accessed by a new approximately 330-foot long by 15-foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. Stormwater from the new impervious surface will be split between a new infiltration drywell and the existing stormwater pond that serves the substation. No modifications to the existing stormwater pond will occur. The proposal also includes the installation of a new three-pole 230 kV H-frame (77 feet, 67 feet, and 77 feet above grade) outside the fenced area to accommodate a reconfiguration of an existing transmission line needed as part of the substation modernization. No tree or significant vegetation removal is proposed as part of this project. The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes (within 50 feet). The applicant has submitted a Technical Information Report (TIR) and Geotechnical Engineering Study with the application. Site Area: 13.4 acres City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 2 of 16 HEX Report B. EXHIBITS: Exhibits 1-7: As shown in the Environmental Review Committee (ERC) Report Exhibit 8: Staff Report to the Hearing Examiner Exhibit 9: Environmental Review Committee Determination of Non-Significance Exhibit 10: Tree Removal and Landscape Plan, prepared by Thomas Luke Early, Licensed Landscape Architect, dated December 13, 2016 Exhibit 11: Current Limiting Reactors Plans and Elevations Exhibit 12: 230 kV H-frame Pole Elevations Exhibit 13: Existing Fence Photos C. GENERAL INFORMATION: 1. Owner(s) of Record: Puget Sound Energy, Inc.; PO Box 97034, EST 4W, Bellevue, WA 98009-9734 2. Zoning Classification: Residential-8 (R-8) 3. Comprehensive Plan Land Use Designation: Residential Medium Density (MD) 4. Existing Site Use: Public Utility 5. Critical Areas: Moderate coalmine hazards, moderate landslide hazards, and sensitive slopes 6. Neighborhood Characteristics: a. North: Single family residential, R-8 zone b. East: Public Utility, R-8 zone c. South: Single family residential, R-8 zone d. West: Public Utility, R-8 zone 7. Site Area: 13.4 acres D. HISTORICAL/BACKGROUND: Action Land Use File No. Ordinance No. Date Comprehensive Plan N/A 5758 06/22/2015 Zoning N/A 5758 06/22/2015 Annexation N/A 1871 03/08/1961 Hearing Examiner Conditional Use Permit, Environmental Review, and Site Plan Review LUA16-000922 N/A 02/28/2017 City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 3 of 16 HEX Report E. PUBLIC SERVICES: 1. Existing Utilities a. Water: No water service is proposed or required for the redevelopment project. b. Sewer: No sewer service is proposed or required for the redevelopment project. c. Surface/Storm Water: The site currently contains an existing substation and with a newly installed on-site stormwater detention system. There are no existing drainage improvements along Beacon Way S or Puget Drive SE. 2. Streets: The proposed development fronts Beacon Way South along the east property line. Beacon Way South is classified as a Residential Access Road and is located within the City of Seattle Cedar River Pipeline Easement. 3. Fire Protection: Renton Regional Fire Authority (RRFA) F. APPLICABLE SECTIONS OF THE RENTON MUNICIPAL CODE: 1. Chapter 2 Land Use Districts a. Section 4-2-020: Purpose and Intent of Zoning Districts b. Section 4-2-060: Zoning Use Table – Uses Allowed in the Zoning Designations c. Section 4-2-110: Residential Development Standards 2. Chapter 3 Environmental Regulations and Overlay Districts a. Section 4-3-050: Critical Area Regulations 3. Chapter 4 City-Wide Property Development Standards 4. Chapter 6 Streets and Utility Standards a. Section 4-6-060: Street Standards 5. Chapter 9 Permits – Specific a. Section 4-9-030: Conditional Use Permits b. Section 4-9-070: Environmental Review Procedures c. Section 4-9-200: Master Plan and Site Plan Review 6. Chapter 11 Definitions G. APPLICABLE SECTIONS OF THE COMPREHENSIVE PLAN: 1. Land Use Element 2. Utilities Element H. FINDINGS OF FACT (FOF): 1. The Planning Division of the City of Renton accepted the above master application for review on May 2, 2019, and determined the application complete on May 15, 2019. The project complies with the 120-day review period. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 4 of 16 HEX Report 2. The project site is located at 2400 S Puget Drive. 3. The project site is currently developed with an existing 230-kV electrical substation. 4. Access to the site would be provided via a new approximately 330-foot long by 15-foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. 5. The property is located within the Residential Medium Density (MD) Comprehensive Plan land use designation. 6. The site is located within the Residential-8 (R-8) zoning classification. 7. No tree or significant vegetation removal is proposed as part of this project. 8. The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes. 9. Approximately 1,050 cubic yards of material would be cut on-site and approximately 1,200 cubic yards of fill is proposed to be brought into the site. 10. The applicant is proposing to begin construction on August 26, 2019, and end construction on December 31, 2019. 11. No other public or agency comments were received. 12. Pursuant to the City of Renton's Environmental Ordinance and SEPA (RCW 43.21C, 1971 as amended), on June 17, 2019, the Environmental Review Committee issued a Determination of Non-Significance (DNS) for the Talbot Hill Substation Current Limiting Reactors (Exhibit 12). A 14-day appeal period commenced on June 21, 2019, and ended on July 5, 2019. No appeals of the threshold determination have been filed as of the date of this report. 13. Representatives from various city departments have reviewed the application materials to identify and address issues raised by the proposed development. These comments are contained in the official file, and the essence of the comments has been incorporated into the appropriate sections of this report and the Departmental Recommendation at the end of this report. 14. Comprehensive Plan Compliance: The site is designated Residential Medium Density (MD) on the City’s Comprehensive Plan Map. The purpose of the MD designation is to allow a variety of single-family and multi-family development types, with continuity created through the application of design guidelines, the organization of roadways, sidewalks, public spaces, and the placement of community gathering places and civic amenities. The proposal is compliant with the following development standards if all conditions of approval are met: Compliance Comprehensive Plan Analysis  Policy L-29: Minimize erosion and sedimentation in and near sensitive areas by requiring appropriate construction techniques and resource practices, such as low impact development.  Policy L-30: Protect the integrity of natural drainage systems, existing land forms, and maintain wildlife habitat values by preserving and enhancing existing vegetation and tree canopy coverage to the maximum extent possible and by restoring hydrological flows and improving the condition of shorelines.  Policy L-33: Emphasize the use of open ponding and detention, vegetated swales, rain gardens, clean roof run-off, right-of-way landscape strips, open space, and stormwater management techniques that mimic natural systems, maximize water quality and infiltration where appropriate, and which will not endanger groundwater quality. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 5 of 16 HEX Report  Policy L-37: Land uses in areas subject to flooding, seismic, geologic, and coal mine hazards should be designed to prevent property damage and environmental degradation before, during, and after construction.  Policy U-73: Encourage electricity purveyors to make facility improvements and additions within existing utility corridors wherever possible.  Policy U-2: Protect the health and safety of Renton citizens from environmental hazards associated with utility systems through the proper design and siting of utility facilities.  Goal U-O: Promote the availability of safe, adequate, and efficient electrical service within the City and its planning area, consistent with the regulatory obligation of the utility to serve customers.  Goal L-BB: Maintain a high quality of life as Renton grows by ensuring that new development is designed to be functional and attractive. 15. Zoning Development Standard Compliance: The site is classified Residential-8 (R-8) on the City’s Zoning Map. Development in the R-8 zone is intended to create opportunities for new single family residential neighborhoods and to facilitate high-quality infill development that promotes reinvestment in existing single family neighborhoods. It is intended to accommodate uses that are compatible with and support a high-quality residential environment and add to a sense of community. The proposed expansion of the Public Utility use requires a Conditional Use Permit in order to be allowed in the R-8 zone. The proposal is compliant with the following development standards if all conditions of approval are met: Compliance R-8 Zone Develop Standards and Analysis N/A Density: The allowed density range in the R-8 zone is a minimum of 4.0 to a maximum of 8.0 dwelling units per net acre. Net density is calculated after the deduction of sensitive areas, areas intended for public right-of-way, and private access easements. Staff Comment: Not applicable, no residential dwelling units are proposed. N/A Lot Dimensions: The minimum lot size permitted in the R-8 zone is 5,000 sq. ft. A minimum lot width of 50 feet is required (60 feet for corner lots) and a minimum lot depth of 80 feet is required. Staff Comment: No applicable. No changes to the lot size, width, or depth are proposed.  Setbacks: The required setbacks in the R-8 zone are as follows: front yard is 20 feet, side yard is 5 feet, side yard along the street 15 feet, and the rear yard is 20 feet. Staff Comment: The subject property is triangular in shape. The proposed new Current Limiting Reactor enclosure would maintain a setback of 218.40 feet from the south property line, a 185.60-foot setback from the east property line, and an approximately 235-foot setback from the west property line. The proposed improvements would exceed all the minimum required setback areas.  Building Standards: The R-8 zone has a maximum building coverage of 50%, a maximum impervious surface coverage of 65%, and a maximum building height of 2 stories with a wall plate height of 24 feet. Nonresidential accessory structures are restricted to a maximum wall plate height of 12 feet. Roofs with a pitch equal to or greater than 4:12 may project an additional six (6) vertical feet from the maximum wall plate height. Staff Comment: Plans and elevations for the new Current Limiting Reactors (CLRs) (Exhibit 11) and for the new three-pole 230 kV H-frame (Exhibit 12) were submitted with City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 6 of 16 HEX Report the project application. A new 190-foot long by 85-foot wide gravel pad will be constructed to support the CLRs and the enclosure. The equipment will be accessed by a new approximately 330-foot long by 15-foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. There is approximately 151,942 square feet of existing impervious surface on site. The applicant proposes approximately 29,439 square feet of new impervious surface, for a total impervious surface of 181,381 square feet. The proposal would result in an impervious surface coverage of approximately 31 percent. The proposed improvements would comply with the impervious surface coverage requirements for the R-8 zone.  Landscaping: The City’s landscape regulations (RMC 4-4-070) require that all portions of the development area not covered by structures, required parking, access, circulation or service areas, be landscaped with native, drought-resistant vegetative cover. The perimeter of all new flow control and/or water quality treatment stormwater facilities shall be landscaped in accordance with the provisions of RMC 4-4-070 and the Surface Water Design Manual. A landscaping strip with a minimum fifteen feet (15') of width shall be located on the outside of the fence. Plantings shall be consistent with the Surface Water Design Manual and RMC 4-4-070. Additionally, trees must be spaced as determined by the Department of Community and Economic Development. Trees and shrubs are prohibited on any berm serving a drainage-related function, within the fenced area of the drainage facility, and within ten feet (10') of any manmade drainage structure (e.g., catch basins, ditches, pipes, vaults, etc.); however, groundcover is required and subject to City review and approval. Staff Comment: The project site received Site Plan Review approval in February of 2017 under LUA16-000922 in order to deviate from storm drainage facility landscaping standards for a new detention pond. A tree removal and landscape plan (Exhibit 10) was reviewed and approved in compliance with conditions of approval for LUA16-000922. The existing stormwater detention pond approved under this permit is located along the southeastern edge of the existing substation. As an alternative to the required fifteen feet of landscaping around the stormwater pond perimeter, the applicant proposed landscape screening southwest of the stormwater pond, immediately south of the existing access driveway, and to the west of the stormwater pond outside of the perimeter fence. This screening currently serves to fill in gaps of existing natural vegetation screening that occurs between the substance and the nearest residential homes approximately 460 feet to the south. The landscaping replaced non-native plant cover such as blackberry shrubs and non-native grasses. The existing sight-obscuring landscaped visual buffer is 20 feet in width in the two locations and contain a mixture of trees and large shrubs, some of which will mature to 35 feet tall. The visual buffer plantings included Vine Maple, Western Serviceberry, Beaked Hazelnut, California Wax Myrtle, Silk Tassel and Strawberry Trees planted at 6 feet triangular on-center spacing. In addition, existing tree canopy/vegetation screening is located between the substation and residential uses to the south, which blocks views from the southeast and southwest of the site. No additional trees or significant vegetation removal is proposed as part of this project. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 7 of 16 HEX Report  Tree Retention: The City’s adopted Tree Retention and Land Clearing Regulations (RMC4-4-130) require the retention of 30 percent (30%) of trees in a residential development. Significant trees shall be retained in the following priority order: Priority One: Landmark trees; significant trees that form a continuous canopy; significant trees on slopes greater than twenty percent (20%); Significant trees adjacent to critical areas and their associated buffers; and Significant trees over sixty feet (60') in height or greater than eighteen inches (18") caliper. Priority Two: Healthy tree groupings whose associated undergrowth can be preserved; other significant native evergreen or deciduous trees; and Other significant non- native trees. Priority Three: Alders and cottonwoods shall be retained when all other trees have been evaluated for retention and are not able to be retained, unless the alders and/ or cottonwoods are used as part of an approved enhancement project within a critical area or its buffer. Staff Comment: Not applicable, no tree removal or significant vegetation removal is proposed as part of this project.  Parking: Vehicle traffic to and from the existing substation use include routine inspections and operations. The substation site provides ample on-site paved space to accommodate parking for inspection/maintenance vehicles. 16. Design Standards: Residential Design and Open Space Standards (RMC 4-2-115) are applicable in the R-8 zone to new residential dwelling units. The proposal does not include any residential dwelling units; therefore the residential design and open space standards are not applicable. 17. Critical Areas: Project sites which contain critical areas are required to comply with the Critical Areas Regulations (RMC 4-3-050). The proposal is consistent with the Critical Areas Regulations: Compliance Critical Areas Analysis  Geologically Hazardous Areas: Based upon the results of a geotechnical report and/or independent review, conditions of approval for developments may include buffers and/or setbacks from buffers. A standard 15-foot building setback is required for all structures from Protected Slope areas. A 50-foot buffer and 15-foot building setback are required from Very High Landslide Hazard Areas. Staff Comment: A geotechnical report (Exhibit 5), dated February 1, 2017, and an addendum letter (Exhibit 6), dated January 29, 2019, completed by GeoEngineers, Inc. was submitted with the application. The project site contains moderate coalmine hazards, moderate landslide hazards and sensitive slopes. The report discusses the soil and groundwater characteristics of the site including infiltration potential and provides recommendations for project design and construction. The site improvements for this project include approximately 0.42 acres of new impervious surface, including a gravel pad for the CLRs and an access road. The total acreage for this project is 0.56 acres of development. The cut will be approximately 1,050 cubic yards and the fill will be approximately 1,200 cubic yards. The proposed City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 8 of 16 HEX Report expansion will be graded to the south to drain to the existing pond located to the south of the expansion area. The report and addendum state that the site is mapped in a moderate coal mine hazard area; however, based on the depth of historical coal mining activity and the relatively shallow depth of the proposed improvements, there is a low coal mine hazard at the site. The addendum identifies that the site is mapped in a 25 to 40 percent steep slope area and in a moderate landslide hazard area; however, the geotechnical engineer has concluded that the proposed improvements would not adversely affect the stability of the slopes in or around the site. According to the report, the soils mapped in the project vicinity are predominantly glacial till, but include localized areas of ice-contact glacial deposits overlying the till. Based on the provided report and addendum, the soils underlying the CLR yard area have a low risk of liquefying under the design earthquake event and a low risk of lateral spread and earthquake-induced slope movement. The site is approximately 5 miles south of the Seattle Fault Zone, which is thought to have a recurrence interval on the order of 1,000 years. Based on the distance from the nearest mapped fault, there is a low risk of fault rupture at the site. Per the provided addendum, GeoEngineers recommend that the new access road surfacing section consist of a minimum of three inches of crushed surfacing top course overlying nine inches of crushed surfacing base course, which is the same road surfacing section used for the existing access road, which this access will extend from. Furthermore, GoeEngineers recommend that the road section be compacted to a firm and unyielding condition using smooth drum vibratory compaction equipment. The geotechnical report includes specific recommendations for: site preparation, shallow and mat foundations, drilled shafts, retaining walls, earthwork, temporary slopes, erosion and sedimentation control, and the stormwater pond for the substation expansion project reviewed and approved in 2017 under file number LUA16-000922. The addendum letter recommends that the earthquake engineering, foundation design, and earthwork recommendations previously presented in the geotechnical report be used for design of the proposed Current Limiting Reactors (CLRs) improvements. 18. Conditional Use Analysis: Puget Sound Energy is requesting a Hearing Examiner Conditional Use Permit, Site Plan Review, and a Special Fence Permit for proposed Talbot Hill Substation improvements. Improvements include the installation of six Current Limiting Reactors (CLRs) within a new fenced enclosure, a new (190' long by 85' wide) gravel pad to support the CLRs and the enclosure, the installation of a new three-pole 230 kV H-frame, and a new gravel access road. The proposal is compliant with the following conditional use criteria, pursuant to RMC 4-9-030.D. Therefore, staff recommends approval of the requested Conditional Use Permit. Compliance Conditional Use Criteria and Analysis  a. Consistency with Plans and Regulations: The proposed use shall be compatible with the general goals, objectives, policies and standards of the Comprehensive Plan, the zoning regulations and any other plans, programs, maps or ordinances of the City of Renton. Staff Comment: See FOF 14 for Comprehensive Plan and zoning regulation compliance. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 9 of 16 HEX Report  b. Appropriate Location: The proposed location shall not result in the detrimental overconcentration of a particular use within the City or within the immediate area of the proposed use. The proposed location shall be suited for the proposed use. Staff Comment: The proposed location of the substation improvements will not result in detrimental overconcentration of a particular use within the City or within the immediate area. The Current Limiting Reactors (CLRs) will be located adjacent to the existing Talbot Hills Substation. The applicant states that this location is necessary due to the function of the CLRs to support the Puget Sound Energy and Bonneville Power Administration transmission lines within the utility corridor. No other use besides utility infrastructure is proposed to be located on the project site.  c. Effect on Adjacent Properties: The proposed use at the proposed location shall not result in substantial or undue adverse effects on adjacent property. Staff Comment: The proposed use at the proposed location will not result in substantial or undue adverse effects on adjacent property. The adjacent property includes an existing regional utility corridor with electric infrastructure and other underground utilities operated by various providers. The property downhill to the south of the site is also owned by Puget Sound Energy and contains transmission lines, significant trees, and recreational facilities. This parcel serves as a buffer to the residential community to the south. The substation is over 460 feet from the nearest residential lot. The Current Limiting Reactors will be situated on the site adjacent to the existing substation north of the existing access driveway and behind a group of significant trees.  d. Compatibility: The proposed use shall be compatible with the scale and character of the neighborhood. Staff Comment: Talbot Substation is an existing substation that was constructed in the early 1960’s. The proposal includes the installation of six Current Limiting Reactors (CLRs) within a new fenced enclosure, a new (190' long by 85' wide) gravel pad to support the CLRs and the enclosure, the installation of a new three-pole 230 kV H-frame, and a new gravel access road. The maximum overall height of the new proposed CLRs is 23 feet and 10.25 inches. The maximum overall height of the new three-pole 230kV H-Frame is 77 feet. The substation is over 460 feet from the nearest residential lot and completely surrounded by transmission corridors. The proposal includes existing vegetation screening, which will restrict views of the substation and proposed improvements to the surrounding neighborhood. The proposed improvements are part of the same use that has been on the site for more than 50 years. The proposed use is compatible with the scale and character of the neighborhood.  e. Parking: Adequate parking is, or will be made, available. Staff Comment: See parking discussion under FOF 15, Zoning Development Standard Compliance: Parking.  f. Traffic: The use shall ensure safe movement for vehicles and pedestrians and shall mitigate potential effects on the surrounding area. Staff Comment: The Talbot Hill substation property is accessed via an existing access driveway extending from Puget Drive SE (See Exhibit 2). As part of the project, the applicant is proposing a new approximately 330-foot long by 15-foot wide gravel access road that will connect to this existing driveway. The project would not generate a significant number of vehicle trips during construction or operation. Daily trips during City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 10 of 16 HEX Report construction will likely include delivery of materials and commuting of the construction crew. No additional trips would be required during operation of the substation, except for routine inspections and operation. The proposed improvements will not result in increased traffic to and from the substation site. Impacts to the surrounding area are not anticipated.  g. Noise, Light and Glare: Potential noise, light and glare impacts from the proposed use shall be evaluated and mitigated. Staff Comment: The applicant states that noise from the Current Limiting Reactors will not exceed existing site noise levels and will be within the regulated noise thresholds. As stated above, the substation is over 460 feet from the nearest residential lot and completely surrounded by transmission corridors. Therefore, any noise generated by the substation and proposed improvements is anticipated to be absorbed by the surrounding corridors. Light, glare or noise volumes would not result in an impact to the surrounding neighborhood.  h. Landscaping: Landscaping shall be provided in all areas not occupied by buildings, paving, or critical areas. Additional landscaping may be required to buffer adjacent properties from potentially adverse effects of the proposed use. Staff Comment: See discussion under FOF 15, Zoning Development Standard: Landscaping. 19. Site Plan Review: The project site received Site Plan Review approval in February of 2017 under LUA16- 000922 in order to deviate from storm drainage facility landscaping standards. Pursuant to RMC 4-9-200.H, major modifications to an approved master plan or site plan require a new application. For Master Plan applications compliance with the review criteria for Site Plans are analyzed at a general level of detail to ensure nothing would preclude the development of the Site Plan. Given Site Plan applications are evaluated for compliance with the specific requirements of the RMC 4-9-200.E.3 the following table contains project elements intended to comply with level of detail needed for Site Plan requests: Compliance Site Plan Criteria and Analysis Compliant if conditions of approval are met a. Comprehensive Plan Compliance and Consistency. Staff Comment: See previous discussion under FOF 14, Comprehensive Plan Analysis.  b. Zoning Compliance and Consistency. Staff Comment: See discussion under FOF 15, Zoning Development Standard Compliance. N/A c. Design Regulation Compliance and Consistency. Staff Comment: Not applicable. See discussion under FOF 16, Design Standards. N/A d. Planned action ordinance and Development agreement Compliance and Consistency. Compliant if condition of approval is met e. Off-site Impacts. Structures: Restricting overscale structures and overconcentration of development on a particular portion of the site. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 11 of 16 HEX Report Staff Comment: See scale and overconcentration discussion under FOF 18, Conditional Use Analysis: Appropriate Location. Circulation: Providing desirable transitions and linkages between uses, streets, walkways and adjacent properties. Staff Comment: The existing access driveway extending from Puget Drive SE would provide the required circulation between the development and the adjacent properties. Utilities, Loading and Storage Areas: Locating, designing and screening storage areas, utilities, rooftop equipment, loading areas, and refuse and recyclables to minimize views from surrounding properties. Locate utilities underground consistent with RMC 4-6-090. Staff Comment: The overall development (public utility) would be screened via the existing trees and landscaping identified in FOF 15, Zoning Development Standard: Landscaping. No loading areas or refuse and recyclable areas are proposed for the site. Views: Recognizing the public benefit and desirability of maintaining visual accessibility to attractive natural features. Staff Comment: The landscape of the areas is relatively flat with large trees and heavy vegetation restricting visibility from the site. The nearest residential uses are more than 460 feet from the substation. Therefore, the proposed height of the structure/improvements are appropriate for this situation. Landscaping: Using landscaping to provide transitions between development and surrounding properties to reduce noise and glare, maintain privacy, and generally enhance the appearance of the project. Staff Comment: See discussion under FOF 15, Zoning Development Standard: Landscaping. Lighting: Designing and/or placing exterior lighting and glazing in order to avoid excessive brightness or glare to adjacent properties and streets. Staff Comment: The application materials do not indicate a proposal for lighting for the Current Limiting Reactors and fence enclosure, nor was a lighting plan provided with the application; therefore, staff recommends as a condition of approval that if lighting is proposed, a lighting plan shall be provided at the time of building permit review that demonstrates compliance with RMC 4-4-075.  f. On-site Impacts. Structure Placement: Provisions for privacy and noise reduction by building placement, spacing and orientation. Staff Comment: See compatibility discussion under FOF 18, Conditional Use Analysis: Compatibility, and Noise discussion under FOF 18, Conditional Use Analysis: Noise, Light, and Glare. Structure Scale: Consideration of the scale of proposed structures in relation to natural characteristics, views and vistas, site amenities, sunlight, prevailing winds, and pedestrian and vehicle needs. Staff Comment: The proposed new Current Limiting Reactors have a maximum height of 23 feet and 10.25 inches. The maximum overall height of the new three-pole 230kV City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 12 of 16 HEX Report H-Frame is 77 feet. The nearest residential uses are more than 460 feet from the substation, with existing vegetation restricting visibility from the site. The proposed control house will not result in substantial or undue adverse effects on adjacent property. Natural Features: Protection of the natural landscape by retaining existing vegetation and soils, using topography to reduce undue cutting and filling, and limiting impervious surfaces. Staff Comment: See discussions under FOF 15, Zoning Development Standard: Tree Retention and Building Standards. Reducing Parking Impervious Areas: Design parking areas to minimize impervious surfaces, including but not limited to: (1) breaking up parking areas and directing stormwater flows to multiple low impact development features such as bioretention areas; (2) locating parking near trees to provide stormwater uptake; (3) retaining or adding vegetation to parking areas; (4) placing existing parking that exceeds maximum parking ratios in permeable pavement designed consistent with the Surface Water Design Manual in RMC 4-6-030; and (5) using other low impact development techniques consistent with RMC 4-6-030 Staff Comment: Not applicable. No parking lot is proposed with this project. Visitors to the site will be limited to routine maintenance for the proposed equipment. Landscaping: Use of landscaping to soften the appearance of parking areas, to provide shade and privacy where needed, to define and enhance open spaces, and generally to enhance the appearance of the project. Landscaping also includes the design and protection of planting areas so that they are less susceptible to damage from vehicles or pedestrian movements. Staff Comment: See FOF 15, Zoning Development Standard: Landscaping.  g. Access and Circulation. Location and Consolidation: Providing access points on side streets or frontage streets rather than directly onto arterial streets and consolidation of ingress and egress points on the site and, when feasible, with adjacent properties. Staff Comment: The equipment will be accessed by a new approximately 330-foot long by 15-foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. No new ingress and egress points are proposed on the public street. Internal Circulation: Promoting safety and efficiency of the internal circulation system, including the location, design and dimensions of vehicular and pedestrian access points, drives, parking, turnarounds, walkways, bikeways, and emergency access ways. Staff Comment: See the location and consolidation discussion under FOF 19, Site Plan Review. The proposed improvements are adequate to promote safety and efficiency of the international circulation system. Loading and Delivery: Separating loading and delivery areas from parking and pedestrian areas. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 13 of 16 HEX Report Staff Comment: Not applicable. No loading and delivery areas are proposed. Transit and Bicycles: Providing transit, carpools and bicycle facilities and access. Staff Comment: Per RMC 4-4-080F.11, the proposal is exempt from bicycle parking requirements. Pedestrians: Providing safe and attractive pedestrian connections between parking areas, buildings, public sidewalks and adjacent properties. Staff Comment: The proposed use will not increase pedestrian traffic on or near the site. Access to the site is provided via an existing access driveway extending through parcel number 2023059064 to the south from Puget Drive Southeast. Puget Drive Southeast is classified as a Minor Arterial Street. A new approximately 330-foot long by 15-foot wide gravel access road will connect the proposed equipment to the existing driveway. See FOF 19, Site Plan Review: Transportation, for more details.  h. Open Space: Incorporating open spaces to serve as distinctive project focal points and to provide adequate areas for passive and active recreation by the occupants/users of the site. Staff Comment: See FOF 16, Design Standards. The project is exempt from open space requirements.  i. Views and Public Access: When possible, providing view corridors to shorelines and Mt. Rainier, and incorporating public access to shorelines Staff Comment: The proposed improvements would not block view corridors to shorelines or Mt. Rainier. The public access requirement is not applicable to the proposal.  j. Natural Systems: Arranging project elements to protect existing natural systems where applicable. Staff Comment: The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes. No other critical areas are located on the project site. No tree removal or significant vegetation removal is proposed. Complaint Provided Condition of Approval is Met k. Services and Infrastructure: Making available public services and facilities to accommodate the proposed use: Police and Fire. Staff Comment: Police and Renton Fire Authority staff indicates that sufficient resources exist to furnish services to the proposed development. No fire impact fees are applicable for this project. Water and Sewer. Staff Comment: No sewer or water service is proposed or required for the redevelopment project. Drainage. Staff Comment: A Technical Information Report (TIR) (Exhibit 3), dated March, 2019, was submitted by Power Engineers with the Land Use Application. Based on the City of Renton’s flow control map, the site falls within the Flow Control Duration Standard area matching Forested Site Conditions and is within the Black River Drainage Basin. The City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 14 of 16 HEX Report development is subject to Full Drainage Review in accordance with the 2017 City of Renton Surface Water Design Manual. All core requirements and the six special requirements are discussed in the Technical Information Report. The report states that the existing substation and access road to the south convey runoff to the existing detention pond on site. The pond was designed in 2016 for adherence to the City of Renton’s Area-Specific Flow Control Facility. The existing substation runoff is captured in catch basins and conveyed to the existing detention pond which sits immediately south of the existing substation. Surface runoff from the areas peripheral to the existing substation also drain southward. The site for the expansion area also drains primarily to the south and south west. The proposed improvements would be graded to the south to drain to the existing pond located to the south of the expansion area. The control structure in the existing pond would be modified to control the additional impervious flow from the proposed pad. The new access road would be constructed at existing grade to maintain existing drainage patterns to the extent possible. The report states that existing pond has adequate capacity to receive the discharge from converted surfaces. Following attenuation in the existing pond, stormwater will discharge to the natural location southwest of the site. Based on the proposal, the expansion project would not contribute any new Pollution Generating Impervious Surface (PGIS) or Pollution Generating Pervious Surface (PGPS) since the proposed land cover does not meet the definition of a pollution generating surface. As a result, the report states that the project qualifies for the Surface Area Exemption from the requirement to provide a water quality facility. A geotechnical report (Exhibit 5), dated February 1, 2017, and an addendum letter (Exhibit 6), dated January 29, 2019, completed by GeoEngineers, Inc. was submitted with the application. The Geotechnical report notes that infiltration is possible within the site; therefore, staff recommends as a condition of approval that the applicant submit a revised geotechnical report at the time of civil construction permit application that evaluates infiltration to its maximum extent feasible. Transportation. Staff Comment: Access to the site is proposed via a new approximately 330-foot long by 15-foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. Increased traffic created by the development would be mitigated by payment of transportation impact fees. Currently this fee is assessed at $6.84 per square foot. This fee increases each year and the applicable fee is paid at the time of building permit issuance. N/A l. Phasing: The applicant is not requesting any additional phasing.  m. Stormwater: Providing optimal locations of stormwater infiltrating low impact development facilities. Avoiding placement of buildings or impervious areas on soils with infiltration capability to the maximum extent practicable. Staff Comment: See discussions under FOF 19, Site Plan Review: Drainage. 20. Special Fence Permit Analysis: The applicant is requesting a Special Fence Permit, per RMC 4-4-040, in order to build an 8-foot tall chain link fence around the proposed Current Limiting Reactors. The proposal City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 15 of 16 HEX Report is compliant with the following Special Fence Permit criteria, pursuant to RMC 4-4-040G.2, if all conditions of approval are met. Therefore, staff is recommending approval of the requested Special Fence Permit. Compliance Special Fence Permit Criteria and Analysis  a. The proposed fence improves the privacy and security of the adjoining yard space. Staff Comment: The applicant asserts that the strict application of the fencing height regulations for the proposed electrical utility infrastructure is not practical or safe. The existing substation facility on the site is surrounded by an 8-foot high barbed chain link fence (See Exhibit 13), which meets Puget Sound Energy (PSE) safety and security standards. The Bonneville Power Administration’s (BPA) substation to the east across Beacon Way South has similar fencing for safety and security purposes. The applicant states that, to not allow an 8-foot high fence around the Current Limiting Reactors (CLRs) would be inconsistent with existing utility facilities within the zoning district and would deprive PSE from the ability to safely and securely operate the CLRs.  b. The proposed fence does not detract from the quality of the residential environment by being out of scale or creating vast blank walls along public roadways. Staff Comment: The substation is over 460 feet from the nearest residential lot to the south. The proposed fence does not detract from the quality of the residential environment. Allowing an 8-foot high fence is consistent with existing utility infrastructure fencing on the site and within the adjacent utility corridor properties. The fenced enclosure will be set back on the property, uphill from residential development in the vicinity, but not directly adjacent to the site. The adjacent property includes an existing regional utility corridor with electric infrastructure and other underground utilities operated by various providers. The property downhill to the south of the site is also owned by Puget Sound Energy and contains transmission lines, significant trees, and recreational facilities. This parcel serves as a buffer to the residential community to the south.  c. The proposed fence compliments the environment it serves in an aesthetically pleasing manner. Staff Comment: The 8-foot high chain-link fence is consistent with existing utility infrastructure fencing on the site and in the vicinity and meets safety and security standards.  d. The proposed fence does not present a hazard to vehicular or pedestrian traffic. Staff Comment: The project site does not abut a public street. The nearest private street is more than 185.6 feet away from the proposed fence enclosure. 21. Availability and Impact on Public Services: Compliance Availability and Impact on Public Services Analysis  Police and Fire: See FOF 19, Site Plan Review: Police and Fire.  Parks: No park impact fees are applicable for this project.  Storm Water: An adequate drainage system shall be provided for the proper drainage of all surface water. City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Hearing Examiner LUA19-000097, CUP-H, SA, ECF, SF Report of July 9, 2019 Page 16 of 16 HEX Report Staff Comment: See FOF 19, Site Plan Review: Drainage.  Water: No water service is proposed or required for the redevelopment project.  Sanitary Sewer: No sewer service is proposed or required for the redevelopment project. I. CONCLUSIONS: 1. The subject site is located in the Residential Medium Density (MD) Comprehensive Plan designation and complies with the goals and policies established with this designation, see FOF 14. 2. The subject site is located in the Residential-8 (R-8) zoning designation and complies with the zoning and development standards established with this designation provided the applicant complies with City Code and conditions of approval, see FOF 15. 3. The proposed Error! Reference source not found. complies with the Critical Areas Regulations provided the applicant complies with City Code, see FOF 17. 4. The proposed substation improvements comply with the Conditional Use Permit criteria as established by City Code and state law provided all advisory notes and conditions are complied with, see FOF 18. 5. The proposed substation improvements comply with the Site Plan Review criteria as established by City Code and state law provided all advisory notes and conditions are complied with, see FOF 19. 6. The proposed fence enclosure complies with the Special Fence Permit criteria as established by City Code and state law provided all advisory notes and conditions are complied with, see FOF 20. 7. There are adequate public services and facilities to accommodate the proposed Error! Reference source not found., see FOF 21. J. RECOMMENDATION: Staff recommends approval of the Talbot Hill Substation Current Limiting Reactors Conditional Use Permit, File No. LUA19-000097, CUP-H, SA, ECF, SF, as depicted in the Site Plan (Exhibit 2), subject to the following conditions: 1. The applicant shall submit a revised geotechnical report at the time of civil construction permit application that evaluates infiltration to its maximum extent feasible. 2. If lighting is proposed, a lighting plan shall be provided at the time of building permit review that demonstrates compliance with RMC 4-4-075. CITY OF RENTON DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT STAFF REPORT TO THE HEARING EXAMINER EXHIBITS Project Name: Talbot Hill Substation Current Limiting Reactors Land Use File Number: LUA19-000097, CUP-H, SA, ECF, SF Date of Hearing July 9, 2019 Staff Contact Angelea Weihs Associate Planner Project Contact/Applicant Kerry Kriner Puget Sound Energy PO Box 97034, EST 4W, Bellevue, WA 98009-9734 Project Location 2400 S Puget Drive The following exhibits are included with the Staff Report to the Hearing Examiner: Exhibits 1-7: As shown in the Environmental Review Committee (ERC) Report Exhibit 8: Staff Report to the Hearing Examiner Exhibit 9: Environmental Review Committee Determination of Non-Significance Exhibit 10: Tree Removal and Landscape Plan, prepared by Thomas Luke Early, Licensed Landscape Architect, dated December 13, 2016 Exhibit 11: Current Limiting Reactors Plans and Elevations Exhibit 12: 230 kV H-frame Pole Elevations Exhibit 13: Existing Fence Photos DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Project Location Map SR_ERC_Report_Talbot_Hill_Substation_190614_FINAL ENVIRONMENTAL REVIEW COMMITTEE REPORT ERC Meeting Date: June 17, 2019 Project File Number: PR19-000212 Project Name: Talbot Hill Substation Current Limiting Reactors Land Use File Number: LUA19-000097, CUP-H, SA, ECF, SF Project Manager: Angelea Weihs, Associate Planner Owner: Puget Sound Energy, Inc.; PO Box 97034, EST 4W, Bellevue, WA 98009-9734 Applicant/Contact: Kerry Kriner, Puget Sound Energy, PO Box 97034, EST 4W, Bellevue, WA 98009- 9734 Project Location: 2400 S Puget Drive Project Summary: Puget Sound Energy (PSE) is requesting a Hearing Examiner Conditional Use Permit, Environmental (SEPA) Review, Site Plan Review, and a Special Fence Permit for proposed Talbot Hill Substation improvements located at 2400 S Puget Drive (parcel number 2023059066). The project site totals 13.4 acres and is zoned Residential-8 (R-8). PSE is proposing to install six Current Limiting Reactors (CLRs) within a fenced enclosure adjacent to the existing Talbot Hill Substation. The proposed CLRs will be installed on elevated pedestals with foundations, and enclosed by an eight foot security fence. A new 190 foot long by 85 foot wide gravel pad will be constructed to support the CLRs and the enclosure. The equipment will be accessed by a new approximately 330 foot long by 15 foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE. The proposal also includes the installation of a new three-pole 230 kV H-frame (77 feet, 67 feet, and 77 feet above grade) outside the fenced area. No tree or significant vegetation removal is proposed as part of this project. The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes (within 50 feet). The applicant submitted a Technical Information Report (TIR) and Geotechnical Engineering Study with the application. Exist. Bldg. Area SF: NA Proposed New Bldg. Area (footprint): Proposed New Bldg. Area (gross): NA NA Site Area: 50.4 acres Total Building Area GSF: NA STAFF RECOMMENDATION: Staff Recommends that the Environmental Review Committee issue a Determination of Non-Significance (DNS). DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Environmental Review Committee LUA19-000097, CUP-H, SA, ECF, SF Report of June 17, 2019 Page 2 of 5 SR_ERC_Report_Talbot_Hill_Substation_190614_FINAL ERC Report_LUA 19-000097_Talbot Hill Substation PART ONE: PROJECT DESCRIPTION / BACKGROUND Puget Sound Energy (PSE) is requesting a Hearing Examiner Conditional Use Permit, Environmental (SEPA) Review, Site Plan Review, and a Special Fence Permit for proposed Talbot Hill Substation improvements located at 2400 S Puget Dr (parcel number 2023059066). The project site totals 13.4 acres and is zoned Residential-8 (R-8). PSE is proposing to install six Current Limiting Reactors (CLRs) within a fenced enclosure adjacent to the existing Talbot Hill Substation. The proposed CLRs are large, highly customized coils that are each supported by three insulators. For safety and security purposes, the CLRs will also be installed on elevated pedestals with foundations, and enclosed by an eight foot security fence. A new 190 foot long by 85 foot wide gravel pad will be constructed to support the CLRs and the enclosure. The equipment will be accessed by a new approximately 330 foot long by 15 foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE to the substation entrance on PSE parcel number 2023059003. Stormwater from the new impervious surface will be split between a new infiltration drywell and the existing stormwater pond that serves the substation. No modifications to the existing stormwater pond will occur. The proposal also includes the installation of a new three-pole 230 kV H-frame (77 feet, 67 feet, and 77 feet above grade) outside the fenced area to accommodate a reconfiguration of an existing transmission line needed as part of the substation modernization. No tree or significant vegetation removal is proposed as part of this project. The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes (within 50 feet). The applicant has submitted a Technical Information Report (TIR) and Geotechnical Engineering Study with the application. PART TWO: ENVIRONMENTAL REVIEW In compliance with RCW 43.21C.240, the following environmental (SEPA) review addresses only those project impacts that are not adequately addressed under existing development standards and environmental regulations. A. Environmental Threshold Recommendation Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials: Issue a DNS with a 14-day Appeal Period. B. Exhibits Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Site Plan Exhibit 3: Drainage Report, prepared by Power Engineers, dated March 2019 Exhibit 4: Drainage Control Plan, prepared by Power Engineers, dated April 1, 2019 Exhibit 5: Geotechnical Report, prepared by GeoEngineers, dated February 1, 2017 Exhibit 6: Geotechnical Report Addendum Letter, prepared by GeoEngineers, dated January 29, 2019 Exhibit 7: Advisory Notes C. Environmental Impacts The Proposal was circulated and reviewed by various City Departments and Divisions to determine whether the applicant has adequately identified and addressed environmental impacts anticipated to occur in conjunction with the proposed development. Staff reviewers have identified that the proposal is likely to have the following probable impacts: 1. Earth DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Environmental Review Committee LUA19-000097, CUP-H, SA, ECF, SF Report of June 17, 2019 Page 3 of 5 SR_ERC_Report_Talbot_Hill_Substation_190614_FINAL ERC Report_LUA 19-000097_Talbot Hill Substation Impacts: A geotechnical report (Exhibit 5), dated February 1, 2017, and an addendum letter (Exhibit 6), dated January 29, 2019, completed by GeoEngineers, Inc. was submitted with the application. The project site contains moderate coalmine hazards, moderate landslide hazards and sensitive slopes. The report discusses the soil and groundwater characteristics of the site including infiltration potential and provides recommendations for project design and construction. The site improvements for this project include approximately 0.42 acres of new impervious surface, including a gravel pad for the CLRs and an access road. The total acreage for this project is 0.56 acres of development. The cut will be approximately 1,050 cubic yards and the fill will be approximately 1,200 cubic yards. The proposed expansion will be graded to the south to drain to the existing pond located to the south of the expansion area. The report and addendum state that the site is mapped in a moderate coal mine hazard area; however, based on the depth of historical coal mining activity and the relatively shallow depth of the proposed improvements, there is a low coal mine hazard at the site. The addendum identifies that the site is mapped in a 25 to 40 percent steep slope area and in a moderate landslide hazard area; however, the geotechnical engineer has concluded that the proposed improvements would not adversely affect the stability of the slopes in or around the site. According to the report, the soils mapped in the project vicinity are predominantly glacial till, but include localized areas of ice-contact glacial deposits overlying the till. Based on the provided report and addendum, the soils underlying the CLR yard area have a low risk of liquefying under the design earthquake event and a low risk of lateral spread and earthquake-induced slope movement. The site is approximately 5 miles south of the Seattle Fault Zone, which is thought to have a recurrence interval on the order of 1,000 years. Based on the distance from the nearest mapped fault, there is a low risk of fault rupture at the site. GeoEngineers state in the provided addendum that the proposed stormwater improvements will be designed in accordance with the 2017 City of Renton Surface Water Design Manual. In accordance with the requirements of Chapter 5.2 of the Manual, GeoEngineers evaluated the site for infiltration potential. Due to the presence of shallow, medium dense to very dense glacial till, GeoEngineers state that infiltration is not feasible on site. Per the provided addendum, GeoEngineers recommend that the new access road surfacing section consist of a minimum of three inches of crushed surfacing top course overlying nine inches of crushed surfacing base course, which is the same road surfacing section used for the existing access road, which this access will extend from. Furthermore, GoeEngineers recommend that the road section be compacted to a firm and unyielding condition using smooth drum vibratory compaction equipment. The geotechnical report includes specific recommendations for: site preparation, shallow and mat foundations, drilled shafts, retaining walls, earthwork, temporary slopes, erosion and sedimentation control, and the stormwater pond for the substation expansion project reviewed and approved in 2017 under file number LUA16-000922. The addendum letter recommends that the earthquake engineering, foundation design, and earthwork recommendations previously presented in the geotechnical report be used for design of the proposed Current Limiting Reactors (CLRs) improvements. It is anticipated that the City’s currently adopted erosion control, construction, building codes and drainage regulations would adequately mitigate for any impacts that could result from the proposed improvements; therefore, no further mitigation is recommended. Mitigation Measures: No further mitigation recommended. Nexus: N/A 2. Air DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Environmental Review Committee LUA19-000097, CUP-H, SA, ECF, SF Report of June 17, 2019 Page 4 of 5 SR_ERC_Report_Talbot_Hill_Substation_190614_FINAL ERC Report_LUA 19-000097_Talbot Hill Substation Impacts: It is anticipated that some temporary air quality impacts could be associated with site work and building construction required to develop this site. Project development impacts during construction may include dust, resulting from grading and exhaust from construction vehicles. Dust control would be mitigated through the use of watering of the site as needed. No further site specific mitigation for the identified impacts from typical vehicle and construction exhaust is required. Mitigation Measures: No further mitigation recommended. Nexus: N/A 3. Water a. Storm Water Impacts: A Technical Information Report (TIR) (Exhibit 3), dated March, 2019, was submitted by Power Engineers with the Land Use Application. Based on the City of Renton’s flow control map, the site falls within the Flow Control Duration Standard area matching Forested Site Conditions and is within the Black River Drainage Basin. The development is subject to Full Drainage Review in accordance with the 2017 City of Renton Surface Water Design Manual. All core requirements and the six special requirements are discussed in the Technical Information Report. The report states that the existing substation and access road to the south convey runoff to the existing detention pond on site. The pond was designed in 2016 for adherence to the City of Renton’s Area-Specific Flow Control Facility. The existing substation runoff is captured in catch basins and conveyed to the existing detention pond which sits immediately south of the existing substation. Surface runoff from the areas peripheral to the existing substation also drain southward. The site for the expansion area also drains primarily to the south and south west. The proposed improvements would be graded to the south to drain to the existing pond located to the south of the expansion area. The control structure in the existing pond would be modified to control the additional impervious flow from the proposed pad. The new access road would be constructed at existing grade to maintain existing drainage patterns to the extent possible. The report states that existing pond has adequate capacity to receive the discharge from converted surfaces. Following attenuation in the existing pond, stormwater will discharge to the natural location southwest of the site. Based on the proposal, the expansion project would not contribute any new Pollution Generating Impervious Surface (PGIS) or Pollution Generating Pervious Surface (PGPS) since the proposed land cover does not meet the definition of a pollution generating surface. As a result, the report concludes that the project qualifies for the Surface Area Exemption from the requirement to provide a water quality facility. It is anticipated that the City’s currently adopted 2017 City of Renton Surface Water Design Manual would mitigate for any potential surface water impacts that could be generated by the project proposal, therefore no further mitigation is recommended at this time. Mitigation Measures: No further mitigation recommended. Nexus: N/A D. Comments of Reviewing Departments The proposal has been circulated to City Department and Division Reviewers. Where applicable, their comments have been incorporated into the text of this report and/or “Advisory Notes to Applicant.”  Copies of all Review Comments are contained in the Official File and may be attached to this report. DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 City of Renton Department of Community & Economic Development Talbot Hill Substation Current Limiting Reactors Staff Report to the Environmental Review Committee LUA19-000097, CUP-H, SA, ECF, SF Report of June 17, 2019 Page 5 of 5 SR_ERC_Report_Talbot_Hill_Substation_190614_FINAL ERC Report_LUA 19-000097_Talbot Hill Substation The Environmental Determination decision will become final if the decision is not appealed within the 14-day appeal period (RCW 43.21.C.075(3); WAC 197-11-680). Environmental Determination Appeal Process: Appeals of the environmental determination must be filed in writing together with the required fee to: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057, on or before 5:00 p.m. on July 5, 2019. RMC 4-8-110 governs appeals to the Hearing Examiner and additional information regarding the appeal process may be obtained from the City Clerk’s Office, Renton City Hall – 7th Floor, (425) 430- 6510. DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 CITY OF RENTON DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT STAFF REPORT TO THE ENVIRONMENTAL REVIEW COMMITTEE EXHIBITS Project Name: Talbot Hill Substation Current Limiting Reactors Land Use File Number: LUA19-000097, CUP-H, SA, ECF, SF Date of Meeting June 17, 2019 Staff Contact Angelea Weihs Associate Planner Project Contact/Applicant Kerry Kriner, Puget Sound Energy, PO Box 97034, EST 4W, Bellevue, WA 98009- 9734 Project Location 2400 S Puget Drive The following exhibits are included with the ERC Report: Exhibit 1: Environmental Review Committee (ERC) Report Exhibit 2: Site Plan Exhibit 3: Drainage Report, prepared by Power Engineers, dated March 2019 Exhibit 4: Drainage Control Plan, prepared by Power Engineers, dated April 1, 2019 Exhibit 5: Geotechnical Report, prepared by GeoEngineers, dated February 1, 2017 Exhibit 6: Geotechnical Report Addendum Letter, prepared by GeoEngineers, dated January 29, 2019 Exhibit 7: Advisory Notes DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 EXISTINGSUBSTATION PADEXISTING ACCESS ROAD18.0' APPROXIMATEROAD WIDTH32.0' APPROXIMATE WIDTH 200.0' WIDE BPA EASEMENTA.F.N. 356049610' WIDE OLYMPIC PIPELINE EASEMENTREC. NO. 731026049510' WIDE OLYMPIC PIPELINE EASEMENTREC. NO. 731026049566.0' ROAD RIGHT-OF-WAY100' WIDE CITY OF SEATTLETRANSMISSION LINE EASEMENTA.F.N. 5333805EX. PONDEX. WATERMANHOLECLR PADEX. DRAINAGESTRUCTURE (TYP.)S85° 45' 05.00"W807.855'N1° 46' 11.80"E150.831'N85° 45' 05.00"E772.741'N71° 05 ' 18.31"E197.597 'N89° 36' 50.13"E377.127'S1° 43' 51.18"W 228.229'S37° 45' 04.91"E515.473'L=188.980,R=1465.690D=7.3875S45° 08' 19.91"E718.908'S89° 10' 15.24"W2315.079'N1° 46' 11.80"E825.192'N71° 05' 18.31"E858.741'EX. CEDAR RIVERPIPELINE (LOCATION NOTVERIFIED)BPA EASEMENTA.F.N. 5178076218.4'EX. LIGHTPOLE (TYP.)981.8'NEW ACCESS ROADWVEX. WATERVALVE589.8'185.6'70.0'180.0'LEGEND:PROPOSED CLR AREAEXISTING SUBSTATIONEXISTING SECTION BOUNDARYEXISTING PROPERTY BOUNDARYEXISTING EASEMENTSEXISTING SUBSTATION ENCLOSURE (CHAIN LINK FENCE)PROPOSED CLR ENCLOSURE (CHAIN LINK FENCE)EXISTING UTILITY POLEPROPOSED UTILITY POLEEXISTING IMPERVIOUS COVERPROPOSED IMPERVIOUS COVERTOTAL POST-DEVELOPED IMPERVIOUSCOVERIMPERVIOUS COVER SUMMARY3.83 ACREA0.42 ACRES4.25 ACRESISSUED FOR PERMITJOB NUMBERDRAWING NUMBERREVSITE PLANS.DWG PUGET SOUND ENERGYTALBOT HILL CLR STATIONSITE PLANEX A1506800SMT 04/01/2019PPG 04/01/2019HSL 04/01/20191"=80'JOB NUMBERDRAWING NUMBERREVISIONSTHIS DRAWING WAS PREPARED BY POWERIS PROHIBITED UNLESS WRITTEN PERMISSIONCONTAINED IN THIS DRAWING FOR ANY PURPOSEREUSE OF THIS DRAWING OR ANY INFORMATIONAND UNIQUE REQUIREMENTS OF THE PROJECT.TAKING INTO CONSIDERATION THE SPECIFICENGINEERS, INC. FOR A SPECIFIC PROJECT,FROM BOTH POWER AND POWER'S CLIENT ISGRANTED.REVSCALE:DATECKDDSGNDRNREFERENCE DRAWINGSAPPDDSGNCKDDRNFOR 24x36 DWG ONLY12345678REVEDCBA1" = 80'80240160040FEET147.7'25.2'EXHIBIT 2EXISTING POND FENCE (CHAIN LINK)EXISTING SUBSTATION ENCLOSURE (CHAIN LINK FENCE)PROPOSED CLR ENCLOSURE (CHAIN LINK FENCE)New access road: 330' long x 15' wide = 4950 sfDocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 March 2019 TECHNICAL INFORMATION REPORT Talbot Hill CLR Installation Renton, Washington PROJECT NUMBER: 15060 PROJECT CONTACT: Stuart Toraason EMAIL: stuart.toraason@powereng.com PHONE: (513)326-1504 Entire DocumentAvailable in Laserfiche Submittals Folder EXHIBIT 3 DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 EXISTINGSUBSTATIONPADEX. PONDNEW CLR AREAEXISTING ACCESS ROADEXPANSION AREA (0.64 ACRES)EXISTING SUBSTATIONAREA (TYP.)T T T TT T T T EX. CONTROL CABLEEXISTING EMERGENCYOVERFLOWDRAINAGE CULVERTPROPOSED CLR ACCESS ROADEX. BPA EASEMENTAREAPROPOSED DRAINAGEDITCHEXISTING ROAD R/W LINE (TYP.)EXISTING CONTROLSTRUCTURE TO BEMODIFIED OR REPLACED(TYPE 2 CATCH BASIN)LEGEND:PROPOSED CLR STATION GRAVEL SURFACEPROPOSED ROAD GRAVEL SURFACEPROPOSED CONCRETE PADPROPOSED RIPRAPEXPANSION AREA (0.64 ACRES)EXISTING SUBSTATION (5.89 ACRES)EXISTING PARCEL BOUNDARYEXISTING EASEMENTEXISTING CLR ENCLOSURE (CHAIN LINK FENCE)EXISTING TREE LINE TO BE MAINTAINEDDRAINAGE DIRECTION FLOW ARROWEXISTING UTILITY POLEPROPOSED UTILITY POLEUSE WATER TIGHT COUPLING TO EXTENDEXISTING IMPERVIOUS COVERPROPOSED IMPERVIOUS COVERTOTAL POST-DEVELOPEDIMPERVIOUS COVER3.83 ACRES0.42 ACRES4.25 ACRESIMPERVIOUS COVER SUMMARYREPLACE PLATEWITH 1" ORIFICEREPLACE PLATEWITH 1/2" ORIFICERAISE TO 433.501.0'REPLACE PLATEWITH 1" ORIFICEUSE WATER TIGHT COUPLING TO EXTENDEXISTING 12-INCH DIAMETER PVC RISER 12"12" CONCRETE RISERON EXISTING TYPE 2CATCH BASINSTRUCTURE (TYP.)ISSUED FOR PERMITJOB NUMBERDRAWING NUMBERREVDRAINAGECONTROLPLAN.DWG PUGET SOUND ENERGYTALBOT HILL CLR STATIONDRAINAGE CONTROL PLANEX C1506800SMT 04/01/2019PPG 04/01/2019HSL 04/01/20191"=40'JOB NUMBERDRAWING NUMBERREVISIONSTHIS DRAWING WAS PREPARED BY POWERIS PROHIBITED UNLESS WRITTEN PERMISSIONCONTAINED IN THIS DRAWING FOR ANY PURPOSEREUSE OF THIS DRAWING OR ANY INFORMATIONAND UNIQUE REQUIREMENTS OF THE PROJECT.TAKING INTO CONSIDERATION THE SPECIFICENGINEERS, INC. FOR A SPECIFIC PROJECT,FROM BOTH POWER AND POWER'S CLIENT ISGRANTED.REVSCALE:DATECKDDSGNDRNREFERENCE DRAWINGSAPPDDSGNCKDDRNFOR 24x36 DWG ONLY12345678REVEDCBAEXHIBIT 4DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 Earth Science + Technology                                           Geotechnical Engineering Services Revised Report Talbot Substation Improvements Renton, Washington for Puget Sound Energy February 1, 2017   Entire DocumentAvailable in Laserfiche Submittals Folder EXHIBIT 5 DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 2101 4th Avenue, Suite 950 Seattle, Washington 98121 206.728.2674 January 29, 2019 Puget Sound Energy 35131 SE Center Street, SQE-OTC Snoqualmie, Washington 98065 Attention: Christopher Russell, PE Subject: Addendum Letter Geotechnical Engineering Services Talbot Hill Substation CLR Improvements Renton, Washington File No. 0186-953-06 INTRODUCTION AND PROJECT UNDERSTANDING This letter presents the results of GeoEngineers, Inc. (GeoEngineers) additional geotechnical engineering services for the proposed current limiting reactor (CLR) improvements at the Puget Sound Energy (PSE) Talbot Hill Substation located at 2400 Puget Drive SE in Renton, Washington. We previously provided geotechnical recommendations for this project in our revised report dated February 1, 2017 and have provided geotechnical construction observation services during Phases 1 and 2 of the substation improvements. This letter incorporates and supersedes a previous draft dated January 25, 2019. The Talbot Hill substation is located adjacent to the Bonneville Power Administration (BPA) Maple Valley substation, and the two substations are interconnected. We understand BPA has identified potential risks to their substation equipment in the event of an interconnection electrical fault. The site is shown in relation to existing improvements in the Vicinity Map, Figure 1 and the Site Plan, Figure 2. This project involves constructing six CLRs, one for each phase of the two transmission line interties, which will act as surge protectors. The CLRs will be installed on elevated pedestals in a new yard area at the southeast corner of the existing PSE Talbot Hill Substation (approximately 190 feet long and 85 feet wide). The CLR yard area will be accessed by a new gravel access road. We understand the new yard area will involve some grading but will not require retaining walls. The existing topography in the area of the proposed CLR yard is slightly uneven, ranging from Elevation 441 to 445 feet. Our geotechnical engineering services were completed in accordance with our proposal dated December 10, 2019. Our scope of work included developing geotechnical conclusions and recommendations and preparing this addendum letter. Entire Document Available in Laserfiche Submittals Folder EXHIBIT 6 DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Page 1 of 2 LUA19-000097 ADVISORY NOTES TO APPLICANT The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use action. Planning: (Contact: Angelea Weihs, 425-430-7312, aweihs@rentonwa.gov) 1. RMC section 4-4-030.C.2 limits haul hours between 8:30 am to 3:30 pm, Monday through Friday unless otherwise approved by the Development Services Division. 2. Commercial, multi-family, new single family and other nonresidential construction activities shall be restricted to the hours between seven o’clock (7:00) a.m. and eight o’clock (8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours between nine o’clock (9:00) a.m. and eight o’clock (8:00) p.m. No work shall be permitted on Sundays. 3. Within thirty (30) days of completion of grading work, the applicant shall hydroseed or plant an appropriate ground cover over any portion of the site that is graded or cleared of vegetation and where no further construction work will occur within ninety (90) days. Alternative measures such as mulch, sodding, or plastic covering as specified in the current King County Surface Water Management Design Manual as adopted by the City of Renton may be proposed between the dates of November 1st and March 31st of each year. The Development Services Division’s approval of this work is required prior to final inspection and approval of the permit. 4. A National Permit Discharge Elimination System (NPDES) permit is required when more than one acre is being cleared. 5. The applicant may not fill, excavate, stack or store any equipment, dispose of any materials, supplies or fluids, operate any equipment, install impervious surfaces, or compact the earth in any way within the area defined by the drip line of any tree to be retained. 6. The applicant shall erect and maintain six foot (6') high chain link temporary construction fencing around the drip lines of all retained trees, or along the perimeter of a stand of retained trees. Placards shall be placed on fencing every fifty feet (50') indicating the words, “NO TRESPASSING – Protected Trees” or on each side of the fencing if less than fifty feet (50'). Site access to individually protected trees or groups of trees shall be fenced and signed. Individual trees shall be fenced on four (4) sides. In addition, the applicant shall provide supervision whenever equipment or trucks are moving near trees. 7. This permit is shall comply with the Bald and Golden Eagle Protection Act. The permitted is responsible for adhering to the U.S. Fish and Wildlife Service National Bald Eagle Management Guidelines (2007) and /or your U.S. Fish and Wildlife Service permit. Development Engineering: (Contact: Justin T. Johnson, 425-430-7291, jtjohnson@rentonwa.gov) 1. See Attached Development Engineering Memo dated June, 2019 Fire Authority: (Contact: Corey Thomas, 425-430-7024, cthomas@rentonwa.gov) 1. No Comments Technical Services: (Contact: Amanda Askren, 425-430-7369, aaskren@rentonwa.gov) EXHIBIT 7 DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 ADVISORY NOTES TO APPLICANT Page 2 of 2 LUA19-000097 1. No Comments Community Services: (Contact: Leslie Betlach, 425-430-6619, lbetlach@rentonwa.gov) 1. No Comments Police: (Contact: Cyndie Parks, 425-430-7521, cparks@rentonwa.gov) 1. No Comments Building: (Contact: Craig Burnell, 425-430-7290, cburnell@rentonwa.gov) 1. Recommendations of the geotechnical report must be followed as a condition of building permits. DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: June 13, 2019 TO: Angelea Weihs, Planner FROM: Justin Johnson, Civil Engineer III, Plan Review SUBJECT: Talbot Hill Substation improvements 2400 S Puget Dr LUA19-0000097 I have completed a preliminary review of the application of the above-referenced proposal located at parcel 2023059066 and have the following comments: The applicant is proposing to install an expansion of the substation located off of Puget Drive. WATER 1. Based on the application the City of Renton does not have any water comments. SANITARY SEWER 1. Based on the application the City of Renton does not have any waste water comments. STORM DRAINAGE 1. The site currently contains an existing substation and there is newly installed on-site stormwater detention system. There are no existing drainage improvements along Beacon Way S or Puget Drive SE. 2. A geotechnical report was prepared by GeoEngineers on February 1st 2017 for the previous project worked on this site. a. The Geotech report mentions that infiltration may be feasible. Please provide an updated Geotech report during your civil construction permit describing the work for this project and includes information on the water table and soil permeability (infiltration rates that meet 2017 RSWDM criteria). 3. Refer to Figure 1.1.2.A – Flow Chart to determine what type of drainage review is required for this site. The site falls within the City’s Flow Control Standard area matching Forested Conditions. The site falls within the Black River drainage basin. Drainage plans and a drainage report complying with the adopted 2017 Renton Surface Water Design Manual will be required. 4. On-site BMPs satisfying Core Requirement #9 are be required for the site. Applicant is proposing to use the reduced impervious surface credit. a. The Geotechnical report notes that infiltration is possible within the site, therefore infiltration must be evaluate to its maximum extent feasible prior to continuing on to other On-Site BMPs (i.e. basic dispersion). DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 PSE Substation Improvements LUA19-0000097 Page 2 of 2 June 13, 2019 5. Applicant will need to ensure that the detention system installed with permit number C17001111 has the capacity to support the new impervious surface. Frontage improvements for the stormwater conveyance system will be installed with permit C17001111. 6. There is a 2019 system Development Charge of $0.72 per sq foot of new impervious surface area, but not less than $1,800.00. TRANSPORTATION 1. Current traffic impact fee is $6.84/SF for light industrial use. Payment of the transportation impact fee is due at the time of issuance of the building permit. 2. The proposed development fronts Beacon Way South along the east property line(s). Beacon Way South is classified as a Residential Access Road and is located within the City of Seattle Cedar River Pipeline Easement. As the road is not public right-of-way, no dedication or frontage improvements will be required as part of the re-development. 3. Frontage improvements along Puget Drive S was required as part of Civil Construction Permit C17001111. A deferral permit has been obtained for the frontage improvements, therefore frontage improvements are not required as part of this project. 4. Per the requirements of RMC 4-6-060, the proposed private access should be in a tract with a minimum easement width of 26 feet and a minimum paved width of 20 feet and must have a minimum pavement thickness of 4” of asphalt over 6” of crushed rock to meet city of Renton standards. The private access should meet the requirements of the Renton Fire Authority. GENERAL COMMENTS 1. Applicant will need to obtain a civil construction permit for the proposed work within the site. 2. Adequate separation between utilities as well as other features shall be provided in accordance with code requirements. a. 7-ft minimum horizontal and 1-ft vertical separation between storm and other utilities is required with the exception of water lines which require 10-ft horizontal and 1.5-ft vertical. b. The stormwater line should be minimum 5 feet away from any other structure or wall or building. c. Trench of any utility should not be in the zone of influence of the retaining wall or of the building. 3. All construction permits for utility and street improvements will require separate plan submittals. All plans shall confirm to the Renton Drafting Standards. A licensed Civil Engineer shall prepare the civil plans. Please visit the Development Engineering Forms page for the most up-to-date plan submittal requirements: http://rentonwa.gov/business/default.aspx?id=42473 4. A landscaping plan shall be included with the civil plan submittal. Each plan shall be on separate sheets. 5. All utility lines (i.e. electrical, phone, and cable services, etc.) serving the proposed development must be underground. The construction of these franchise utilities must be inspected and approved by a City of Renton inspector. 6. Fees quoted in this document reflect the fees applicable in the year 2019 only and will be assessed based on the fee that is current at the time of the permit application or issuance, as applicable to the permit type. Please visit www.rentonwa.gov for the current development fee schedule. DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 Enclosure cc: King County Wastewater Treatment Division Ramin Pazooki, WSDOT, NW Region Boyd Powers, Department of Natural Resources Larry Fisher, WDFW Karen Walter, Fisheries, Muckleshoot Indian Tribe Duwamish Tribal Office Melissa Calvert, Muckleshoot Cultural Resources Program US Army Corp. of Engineers Stephanie Jolivette, Office of Archaeology & Historic Preservation Washington State Department of Ecology June 21, 2019 Washington State Department of Ecology Environmental Review Section PO Box 47703 Olympia, WA 98504-7703 Subject: ENVIRONMENTAL (SEPA) THRESHOLD DETERMINATION Transmitted herewith is a copy of the Environmental Determination for the following project reviewed by the Environmental Review Committee (ERC) on June 17, 2019: SEPA DETERMINATION: Determination of Non-Significance (DNS) PROJECT NAME: Talbot Hill Substation Current Limiting Reactors PROJECT NUMBER: LUA19-000097, CUP-H, SA, ECF, SF Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on July 5, 2019, together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and information regarding the appeal process may be obtained from the City Clerk’s Office, (425) 430-6510. Please refer to the enclosed Notice of Environmental Determination for complete details. If you have questions, please call me at (425) 430-7312. For the Environmental Review Committee, Angelea Weihs Associate Planner DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT SIGNATURES: Gregg Zimmerman, Administrator Public Works Department Date Rick M. Marshall, Administrator Renton Regional Fire Authority Date Kelly Beymer, Administrator Community Services Department Date C.E. Vincent, Administrator Date Department Of Community & Economic Development ENVIRONMENTAL (SEPA) DETERMINATION OF NON-SIGNIFICANCE (DNS) PROJECT NUMBER: LUA19-000097, CUP-H, SA, ECF, SF APPLICANT: Kerry Kriner, Puget Sound Energy, PO Box 97034, EST 4W, Bellevue, WA 98009 PROJECT NAME: Talbot Hill Substation Current Limiting Reactors PROJECT DESCRIPTION: Puget Sound Energy (PSE) is requesting a Hearing Examiner Conditional Use Permit, Environmental (SEPA) Review, Site Plan Review, and a Special Fence Permit for proposed Talbot Hill Substation improvements located at 2400 S Puget Drive (parcel number 2023059066). The project site totals 13.4 acres and is zoned Residential-8 (R-8). PSE is proposing to install six Current Limiting Reactors (CLRs) within a fenced enclosure adjacent to the existing Talbot Hill Substation. The proposed CLRs will be installed on elevated pedestals with foundations, and enclosed by an eight foot security fence. A new 190 foot long by 85 foot wide gravel pad will be constructed to support the CLRs and the enclosure. The equipment will be accessed by a new approximately 330 foot long by 15 foot wide gravel access road that will connect to an existing gravel driveway which extends from Puget Dr. SE. The proposal also includes the installation of a new three-pole 230 kV H-frame (77 feet, 67 feet, and 77 feet above grade) outside the fenced area. No tree or significant vegetation removal is proposed as part of this project. The project site contains moderate coalmine hazards, moderate landslide hazards, and sensitive slopes (within 50 feet). The applicant submitted a Technical Information Report (TIR) and Geotechnical Engineering Study with the application. PROJECT LOCATION: 2400 S Puget Drive LEAD AGENCY: City of Renton Environmental Review Committee Department of Community & Economic Development The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). This Determination of Non-Significance is issued under WAC 197-11-340. Because other agencies of jurisdiction may be involved, the lead agency will not act on this proposal for fourteen (14) days. Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on July 5, 2019. Appeals must be filed in writing together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and more information may be obtained from the Renton City Clerk’s Office, (425) 430-6510. PUBLICATION DATE: June 21, 2019 DATE OF DECISION: June 17, 2018 DocuSign Envelope ID: EAEF8F0A-FB97-4552-9FAF-C1CFC9A08FB6 6/17/2019 | 11:37 AM PDT 6/17/2019 | 2:44 PM PDT 6/17/2019 | 11:26 AM PDT 6/18/2019 | 2:26 PM PDT MULCH PER SPECIFICATIONS(MULCH STEM) NSCALE:FILE NO: SHEET: REV NODRAWING NO 12345678 12345678 A B C D E A B C D E CADD NO: CLASS: DATE (M/D/Y)SUBSTATION ENGINEERING DEPARTMENT $FILE$$DATE$$USER$$$DGN$$CODE: ENGINEER REVIEWED REVISION DESCRIPTION: CAD APPROVED WO NUMBER: OF D- Know what'sbelow. before you dig.Call R SITE 1 TAL 90'-0"90'-0"70'-0"67'-0"67'-0"23'-0"23'-0" 180'-0"12'-6‚"10'-0"10'-0"12'-6‚"10'-0"10'-0"1"= 10'-0" TALBOT HILL SUBSTATION 230KV SWITCHYARD CLR LAYOUT B XXXXXXX ISSUED FOR 60% REVIEW 43'-0"47'-0"47'-0"43'-0" 24'-9"18'-3"18'-3"28'-9"28'-9"18'-3"18'-3"24'-9"45'-0"25'-0"4"9"7" 8"4"6"17'-0"17'-0"NORTH-SOUTH BASELINE N X°XX'XX WN X°XX'XX WEAST-WEST BASELINEL L LC CLR L CLR C L CLR C L CLR C L CLR C L CLR C L CLR C -- B C - A LAYOUT 1 MC2 MC1 12'-1•" 15'-2‡" 4"9"7" 8"4"6" 12'-1•" 15'-2‡" MC2 MC1 SUPPORT C CABLE SUPPORT C CABLE STRUCTURE TRANSMISSION STRUCTURE TRANSMISSION DRAWINGS SEE PLAN & PROFILE STRUCTURE TRANSMISSION SCALE:FILE NO: SHEET: REV NODRAWING NO 12345678 12345678 A B C D E A B C D E CADD NO: CLASS: DATE (M/D/Y)SUBSTATION ENGINEERING DEPARTMENT $FILE$$DATE$$USER$$$DGN$$CODE: ENGINEER REVIEWED REVISION DESCRIPTION: CAD APPROVED WO NUMBER: OF D- Know what'sbelow. before you dig.Call R SITE 1 TAL AROUND SITE WITH 1' OF BARB WIRE 7' COMPOSITE FENCE TRANSMISSION LINE OVERHEAD TRANSMISSION LINE OVERHEAD APPX. 52'-0"7'-0"APPX. 23'-10‚"APPX. 35'-4•"7'-0"AROUND SITE WITH 1' OF BARB WIRE 7' COMPOSITE FENCE MC2 SUBSTATION TO TALBOT ELEVATION A-A L CLR C L CLR C L CLR C L CLR C L CLR C L CLR C L L CLR C ELEVATION B-B XXXXXXX TALBOT HILL SUBSTATION 230KV SWITCHYARD CLR ELEVATIONS 1/8"= 1'-0" ELEV 1 SUBSTATION TO MAPLE VALLEY APPX. 16'-7…"AROUND SITE WITH 1' OF BARB WIRE 7' COMPOSITE FENCE SUBSTATION TO TALBOT L CLR C ELEVATION C-C SUBSTATION TO MAPLE VALLEY APPX. 52'-0"APPX. 42'-0"12'-1•" 15'-2‡" YARDS BETWEEN REACTOR BARB WIRE WITHOUT 1' OF FENCE 7' COMPOSITE MC1 24'-9"18'-3"18'-3"28'-9"28'-9"18'-3"18'-3"24'-9" 43'-0"47'-0"47'-0"43'-0" 90'-0" 180'-0" 90'-0"APPX. 42'-0"70'-0" 45'-0"25'-0"45'-0"25'-0" 70'-0" 17'-0"17'-0"APPX. 18'-9"ISSUED FOR 60% REVIEW IN OUT 13'-4†"6'-8…"12'-1•" 15'-2‡" IN OUT 13'-4†"6'-8…"MC1 MC1 MC2 12'-1•" 15'-2‡"6'-8…"13'-4†"APPX. 23'-10‚"12'-1•" 15'-2‡"6'-8…"13'-4†"8'-6"MC2 MC2 MC1 8'-6"8'-6"8'-6"B SUPPORT CABLE C L SUPPORT CABLE C ASSEMBLY CABLE SUPPORT6'-8"11'-6"17'-0"17'-0" SUPPORT CABLE C SUPPORT CABLE CL L6'-8"11'-6"ASSEMBLY CABLE SUPPORT6'-8"6'-8"18'-9"APPX. 23'-6•"APPX. 27'-7‚"7'-0"INLINE INSULATOR INLINE INSULATOR TALBOT HILL SUBSTATION 230 kV 3-POLE DEADEND 75'-0" 65'-0" 75'-0" 5'-0"5'-0"5'-0" 1'-4" 1'-0" 1'-4" FINISHED GRADE 2'-0" (TYP)