HomeMy WebLinkAboutERC_Determination_Ltr_Applicant_Talbot_Hill_Substation_Current_Limiting_Reactors_190621
June 21, 2019
Kerry Kriner
Puget Sound Energy
PO Box 97034, EST 4W
Bellevue, WA 98009
SUBJECT: ENVIRONMENTAL THRESHOLD (SEPA) DETERMINATION
Talbot Hill Substation Current Limiting Reactors, LUA19-000097, CUP-H, SA, ECF, SF
Dear Ms. Kriner:
This letter is written on behalf of the Environmental Review Committee (ERC) to advise you that they have
completed their review of the subject project and have issued a threshold Determination of Non-Significance.
Please refer to the enclosed ERC Report and Decision for more details.
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 more information
regarding the appeal process may be obtained from the Renton City Clerk’s Office, (425) 430 -6510.
If the Environmental Determination is appealed, a public hearing date will be set and all parties notified.
If you have any questions or desire clarification of the above, please call me at (425) 430-6598.
For the Environmental Review Committee,
Anglea Weihs
Associate Planner
Enclosure
cc: Puget Sound Energy, Inc. / Owner(s)
DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT
Planning Division
1055 South Grady Way, 6th Floor | Renton, WA 98057 | 425-430-7200, ext. 2
www.rentonwa.gov
OF ENVIRONMENTAL DETERMINATION
ISSUANCE OF A DETERMINATION OF
NON-SIGNIFICANCE (DNS)
POSTED TO NOTIFY INTERESTED PERSONS OF AN ENVIRONMENTAL ACTION
DNS: THE CITY OF RENTON ENVIRONMENTAL REVIEW COMMITTEE (ERC) HAS DETERMINED THAT THE PROPOSED
ACTION DOES NOT HAVE A SIGNIFICANT ADVERSE IMPACT ON THE ENVIRONMENT.
DATE OF NOTICE OF ENVIRONMENTAL
DETERMINATION:
June 21, 2019
PROJECT NAME/NUMBER: PR19-000212 Talbot Hill Substation Current
PROJECT LOCATION: 2400 S Puget Drive (APN 2023059066)
LOCATION WHERE APPLICATION MAY
BE REVIEWED:
Applicant documents are available online through the City of Renton
Document Center website. See also http://bit.ly/2WT8LNN
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 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.
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 City of RMC 4-8-110 and information regarding the appeal process may be obtained
from the Renton City Clerk’s Office, (425) 430-6510.
PUBLIC HEARING: A public hearing is tentatively scheduled for July 9, 2019 at 11:00 AM before
the Renton Hearing Examiner in Renton Council Chambers on the 7th floor of
Renton City Hall, located at 1055 South Grady Way. If the Environmental
Determination is appealed, the appeal will be heard as part of this public
hearing.
NOTICE
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
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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.)TTTTTTT
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
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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.
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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
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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).
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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.
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