HomeMy WebLinkAboutD_King County Solar Lights_CAE_SME_FINALDEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
D_King County Solar Lights_CAE_SME_FINAL
PLANNING DIVISION
CERTIFICATE OF EXEMPTION
FROM SHORELINE SUBSTANTIAL DEVELOPMENT AND
CRITICAL AREAS REGULATIONS
EVALUATION FORM & DECISION
DATE OF DECISION: July 21, 2025
PROJECT NUMBER: LUA25-000196, SME, CAE
PROJECT NAME: King County Parks Solar Light Improvement
PROJECT MANAGER: Jill Ding, Senior Planner
APPLICANT/OWNER/
CONTACT: Tom Early, King County Department of Natural Resources and Parks
201 S Jackson Street, Suite 6500, Seattle, WA 98104
PROJECT LOCATION: 3501 Lake Washington Blvd N, Renton, WA 98056; 12500 SE 188th Pl, Renton,
WA 98058; Eastrail Trail at N 43rd St on the NW and SW corners; Eastrail Trail at N 41st St; Eastrail at Mountain
View Ave N; Boulevard Lane Park; and Lake to Sound Trail at the railroad tracks near Monster Rd SW (APNs
2924059005, 3224059005, 3124059004, 1423049008, and 3323059057).
PROJECT DESCRIPTION: The applicant is requesting a Critical Areas Exemption and Shoreline
Exemption for the installation of off-grid, solar lights at six (6) locations within King County Parks Properties
located within the City of Renton (Attachment A). The proposed lights would be installed at the following
locations: Eastrail at N 43rd St on the NW corner and SW corner, Eastrail at N 41st St, Eastrail at Mountain
View Ave N, Boulevard Lane Park, and Lake to Sound Trail at the railroad tracks near Monster Rd SW
(Attachment B). The purpose of the project is to enhance park safety for park visitors by increasing visibility
during low-light hours. The proposed lights would have a base that is two feet (2’) in diameter and would be
installed at a depth of approximately nine feet (9’) below ground surface. According to the City's COR mapping
system, parcel 2924059005, located at the project location, is mapped with high seismic hazard areas. Parcel
3224059005 at the project location is mapped with heigh seismic hazard areas, is within the Shoreline
Residential Designation of May Creek, Reach A, and is located within 200 feet (200’) of a wetland. Parcel
3124059004 is mapped with high landslide hazard areas, sensitive slopes, and is within the Shoreline
Residential Designation of Lake Washington, Reach E. Parcel 1423049008 is mapped with the 100-year flood
plain of Springbrook Creek, sensitive and protected slopes, and is within the Natural Environment Designation
of the Black River/Springbrook Creek, Reach A. Parcel 3323059057 is mapped with the 100-year floodplain,
high seismic hazard areas, Type F stream, and wetlands.
SEC-TWN-R: 2924059005: SW 29-24-05
3224059005: NW 32-24-05
3124059004: SE 31-24-05
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 2 of 7
D_King County Solar Lights_CAE_SME_FINAL
1423049008: SE 14-23-04
3323059057: SE 33-23-05
LEGAL DESCRIPTION:
(King County Assessor)
2924059005: 100 FT R/W OVER GLS 1 THRU 5 LESS POR FOR CO RD & LESS POR
OF GL 2 DAF - BAAP OF NXN OF S LN OF N 16.8 FT OF LOT 24 BLK C OF HILLMANS
LK WN GARDEN OF EDEN #3 WITH SWLY MGN OF SD 100 FT R/W TH N 12-55-46
W ALG SD SWLY MGN 5.09 FT TO TPOB TH CONT N12-55-46 W ALG SD SWLY MGN
38.46 FT TH S 89-33-37 E 3.16 FT TH S 11-0-29 E 38.18 FT TH N 89-33-37 W 1.84
FT TO TPOB (PER KC CT ORDER #90-2-04656-7) LESS WLY 35 FT LY CONTIGS TO
& ELY OF LOTS 1 THRU 7 BLK B LK WASHINGTON SH LDS BOUNDED ON N BY ELY
EXT SD LOT 1 & BOUNDED ON S BY ELY EXT OF LOT 7
3224059005: RR R/W OVER NW 1/4 SD SEC 32 & TGW R/W OVER NE 1/4 31-24-5
LESS WLY 15 FT M/L THOF DAF - COMMENCING AT THE W QTR COR STR 32-24-
05 TH N 17-24-36 E 808.55 TAP ON W RR R/W LN WCH IS THE NE COR OF
TIBBETTS PROP & TPOB TH S 88-42-39 W 17.69 FT TH NELY ON A CRV TO RGT
WHOSE CENTER BEARS S 59-25-07 E DIST 2038.59 A C/A 03-00-54 AND A CRV
LENGTH OF 107.27 FT TH S 73-02-49 E 15.66 FT TH SWLY ON A CRV TO LFT
WHOSE CENTER BEARS S 56-16-36 E WITH A DIST OF 2023.59 FT A C/A OF 02-52-
39 AND A CRV LENGTH OF 101.63 FT TO THE POINT OF BEGINNING LESS NWLY
25.00 FT OF BNSF ROW LY BTWN TWO LNS DRAWN PLW & DIST 25.00 AND 50.00
FT NWLY AS MEAS AT R/A FR MAIN TRACK C/L BOUNDED ON THE NORTH BY THE
ELY EXTN OF THE NORTH LN OF LOT 1 AND BOUNDED ON THE SOUTH BY THE
ELY EXTN OF THE SOUTH LN OF LOT 13 OF SD HILLMANS LAKE WASHINGTON
GARDEN OF EDEN DIV NO 2 PLAT
3124059004: BN FORMERLY NP R/W OVER SE 1/4 OF STR 31-24-05 LESS POR WLY
OF LN BAAP ON N LN SD SUBD 35 FT W FR C/L SD R/W TH SWLY TAP 45 FT W - AT
R/A'S FR SD C/L & 25 FT S FR SD N LN TH W 5 FT & LESS POR PER SURV REC
#9901299008 LESS POR PER SURV REC NO 9904129002 & LESS PER REC #
20001218000913 (SEE RENTON SP# LUA-10-038-SHPL REC# 20101229900002)
LESS POR GL 3 SD STR DAF - BEG SE 1/4 COR SD SEC 31 TH N 1-48-16 E 2455.27
FT TH N 88-11-44 W 41.34 FT BNG C/L LK WASH BLVD TH S 20-04-48 W ALG SD
C/L 405.39 TH ALG CRV TO R RAD 1602.25 FT ARC DIST 217.53 FT TH N 59-28-15
W 63.79FT TAP 20FT AS MEAS RADIALLY FROM BN R/R MAINTRACK C/L TH SLY
PLT SD C/L ALG CRV TO R RAD 1552.2 FT ARC DIST 25.02 FT TH N 59-28-15 W
119.27 FT TH N 25-57-59 E 25.11 FT TH S 59-28-15 E 120.53 FT TO POB
1423049008: POR FORMER CM ST P & P RR R/W IN SW 1/4 13-23-4 & POR GL 14
IN SE 1/4 14-23-4 LY SLY OF PLT OF RENTON SH LDS 2ND SUPL TGW POR SD CM
ST P & P R/W IN GL 1 NW 1/4 24-23-4 & POR GL 2 NE 1/4 23-23-4 ALL LY NELY OF
100 FT OWRR & NAV CO R/W PER LTR DEPT OF REV 2/3/88
3323059057: PORTION OF SOUTHEAST 1/4 - BEGIN SW CORNER OF SE 1/4 TH N
01-51-31 E 1073.96 FT TO POINT OF BEGINNING TH S 89-39-00 E PLW S LINE OF
SE 1/4 500.17 FT TO SW CORNER OF LOT 52 OF BOULEVARD LANE DIVISION NO
1 TH N 01-51-31 E 286.83 FT TH N 16-17-15 E 388.75 FT TH N 89-39-00 W 597.07
FT TO AN INTERSECTION WITH W LINE OF SE 1/4 TH S 01-51-31 W 660.75 FT TO
POINT OF BEGINNING TGW S 1073.55 FT OF WEST 1043.55 FT OF SW 1/4 OF SE
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 3 of 7
D_King County Solar Lights_CAE_SME_FINAL
1/4 - BEGIN SW CORNER OF SW 1/4 OF SE 1/4 TH S 89-39-00 E 422 FT TH N 0-21-
00 E 300 FT TH NWLY TO A POINT 300 FT EAST OF NW CORNER OF SAID TRACT
OF LAND TH N 89-39-00 W 300 FT TH S 01-51-31 W 1073.92 FT TO POINT OF
BEGINNING LESS PORTION FOR CO ROAD SUBJECT TO BONNEVILLE
TRANSMISSION LINE EASEMENT
WATER BODY/REACH: May Creek, Reach A; Lake Washington, Reach E; and Black River/Springbrook
Creek, Reach A
CRITICAL AREA(S): According to the City's COR mapping system, the project site is mapped with high
seismic hazard areas; the Shoreline Residential Designation of May Creek, Reach
A; high landslide hazard area; sensitive slopes; the Shoreline Residential
Designation of Lake Washington, Reach E; 100-year flood plain, Type F stream,
wetlands, and the Natural Environment Designation of the Black
River/Springbrook Creek, Reach A.
CRITICAL AREAS EXEMPTION JUSTIFICATION/DECISION: An exemption from critical area regulations, is
hereby CONDITIONALLY APPROVED on the proposed project in accordance with RMC 4.3.050C “Exempt,
Prohibited and Nonconforming Activities” and for the following reasons:
Maintenance, Operation, and Repair of existing Parks, Trails, Roads, Facilities, and Utilities, and the
Construction of New Trails is exempt from permit requirements within critical areas and associated buffers
in accordance with RMC 4.3.050C.3.e, within Geological Hazard Areas, Habitat Conservation Areas,
Streams, and Wetlands subject to the following standards:
Normal and routine maintenance, operation and repair of existing parks, trails, streets, roads, rights-of-way
and associated appurtenances, facilities and utilities where no alteration or additional fill materials will be
placed other than the minimum alteration and/or fill needed to restore those facilities or to construct new
trails to meet established safety standards. The use of heavy construction equipment shall be limited to
utilities and public agencies that require this type of equipment for normal and routine maintenance and
repair of existing utility structures and rights-of-way. In every case, critical area and required buffer impacts
shall be minimized and disturbed areas shall be restored during and immediately after the use of
construction equipment.
Staff Comment: The proposed solar lighting installation would be considered maintenance and repair work
at an existing parkor along an existing trail, subject to the condition that any disturbed areas are restored
immediately following the installation of the solar lights.
The proposed solar light installation on the Lake to Sound Trail at the railroad tracks near Monster Rd SW (APN
1423049008) would be installed within the mapped 100-year floodplain of Springbrook Creek. In addition, the
proposed solar light installation at Boulevard Lane Park (APN 3323059057) would also be located within the
mapped 100-year floodplain of the on-site Type F stream. The proposed work would not be exempt from
compliance with the floodplain regulations.
The solar lighting installation at Boulevard Lane Park would be installed at approximately 378.0 feet (378.0’)
(NAVD 88) per the 2025 King County Digital Ground Model. This ground elevation is higher than the base flood
elevation of 372.2 feet (372.2’) per FEMA Cross Section BK near the project location. Therefore, the light pole
is above and outside of the Special Flood Hazard Area based on its elevation.
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 4 of 7
D_King County Solar Lights_CAE_SME_FINAL
The solar lighting installation proposed within the Lake to Sound Trail near the Black River would be installed
at approximately 17.2 feet (17.2’) per the 2025 King County Digital Ground Model. This is located within a Zone
AE floodplain of the Green-Duwamish River where the base flood elevation is approximately 23 feet (23’) per
the FEMA FIRMette. RMC 4-3-050G.4.e.vi prohibits development in Zone AE special flood hazard areas,
unless it is demonstrated that the water surface elevations of the base flood will not increase more than one
foot (1’) at any point within the community. This single light pole is a small, isolated obstruction and part of a
minor project that would not result in a one-foot (1’) increase in water surface elevation consistent with the
following FEMA guidance:
“There are other minor projects that probably will not increase flood stages. For example, small, isolated
obstructions such as a mailbox, a pitcher’s mound, or a single telephone pole can be permitted without
requiring no-rise certification.”
- FEMA Guidance for Flood Risk Analysis and Mapping: 11.1.1. Exemption for Minor Projects
As the proposed light pole would be similar in scale to a telephone pole, it would appear that the proposed
work would be exempt from the compensatory storage requirements as the proposal is not likely to increase
the flood elevation in the vicinity of the project site.
SHORELINE EXEMPTION JUSTIFICATION/DECISION: An exemption from a Shoreline Management
Substantial Development Permit is hereby CONDITIONALLY APPROVED on the proposed project in
accordance with RMC 4.9.190C “Exemption from Permit System’ and for the following reasons:
Per RMC 4-9-190C.1.i, the following shall not be considered substantial developments for the purpose of the
Shoreline Master Program and are exempt from obtaining a Shoreline Substantial Development Permit
(SSDP):
Normal maintenance or repair of existing structures or development, including damage by accident, fire or
elements, provided:
i. “Normal maintenance” includes those usual acts to prevent a decline, lapse, or cessation from a
lawfully established condition.
ii. “Normal repair” means to restore a development to a state comparable to its original condition,
including but not limited to its size, shape, configuration, location and external appearance, within a
reasonable period after decay or partial destruction, except where repair causes substantial adverse
effects to the shoreline resource or environment.
iii. Replacement of a structure or development may be authorized as repair where such replacement
is the common method of repair for the type of structure or development and the replacement
structure or development is comparable to the original structure or development including, but not
limited to, its size, shape, configuration, location and external appearance and the replacement does
not cause substantial adverse effects to shoreline resources or environment.
Staff Comment: Parcel 3224059005 at the project location is mapped within the Shoreline Residential
Designation of May Creek, Reach A. Parcel 3124059004 is mapped within the Shoreline Residential
Designation of Lake Washington, Reach E. Parcel 1423049008 is mapped within the Natural Environment
Designation of the Black River/Springbrook Creek, Reach A. The proposed solar light installation within
existing King County Parks would qualify as maintenance of an existing development as the proposed solar
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 5 of 7
D_King County Solar Lights_CAE_SME_FINAL
lighting would prevent a decline from a lawfully established condition as the proposed lighting would increase
safety for park visitors during low-light hours.
CRITICAL AREA EXEMPTION FINDINGS: The proposed development is consistent with the following
findings pursuant to RMC section 4-3-050C.2.d:
YES i. The activity is not prohibited by this or any other provision of the Renton Municipal
Code or State or Federal law or regulation;
Staff Comments: The installation of solar lights is not a prohibited activity under
the currently adopted City Code, or by State or Federal law.
YES ii. The activity will be conducted using best management practices as specified by
industry standards or applicable Federal agencies or scientific principles;
Staff Comments: The applicant submitted a Geotechnical Report, prepared by
HWA GeoSciences Inc., dated May 14, 2025 (Attachment C); a Critical Areas
Technical Memorandum, prepared by ESA, dated May 29, 2025 (Attachment D),
and a Flood Hazard Data memorandum, prepared by King County Park and
Recreation Division, dated June 17, 2025 (Attachment E). The submitted reports
and studies provided best management practices that would guide the solar light
installation. The proposed work would be conducted utilizing best management
practices, provided the recommendations within these reports and studies are
followed during and after the installation of the solar lights.
YES, IF
CONDITIONS
OF
APPROVAL
ARE MET
iii. Impacts are minimized and, where applicable, disturbed areas are immediately
restored;
Staff Comments: Any temporary impacts to the critical areas and their buffers
during construction would be restored post-construction. Furthermore, any
disturbed areas would be required to be immediately restored upon project
completion. Therefore, as a condition of approval, the applicant shall restore
disturbed areas immediately following the investigation and schedule a restoration
inspection with the Current Planning Project Manager, Jill Ding, at
jding@rentonwa.gov or (425) 430 -6598. Additionally, in the event that water body
or buffer disturbance occurs as a result of the proposed solar light installation,
revegetation with native vegetation would be required.
YES iv. Where water body or buffer disturbance has occurred in accordance with an
exemption during construction or other activities, revegetation with native
vegetation shall be required.
Staff Comments: In the event that water body or buffer disturbance occurs as a
result of the proposed solar light installation, revegetation with native vegetation
would be required.
YES v. If a hazardous material, activity, and/or facility that is exempt pursuant to this
Section has a significant or substantial potential to degrade groundwater quality,
then the Administrator may require compliance with the Wellhead Protection Area
requirements of this Section otherwise relevant to that hazardous material,
activity, and/or facility. Such determinations will be based upon site and/or
chemical-specific data.
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 6 of 7
D_King County Solar Lights_CAE_SME_FINAL
Staff Comments: No hazardous materials are required for the installation of the
solar light poles.
SHORELINE EXEMPTION FINDINGS: The proposed development is consistent with:
YES i. The policies of the Shoreline Management Act.
Staff Comments: Parcel no. 3224059005 at the project location is mapped within
the Shoreline Residential Designation of May Creek, Reach A. Parcel no.
3124059004 is mapped within the Shoreline Residential Designation of Lake
Washington, Reach E. Parcel no. 1423049008 is mapped within the Natural
Environment Designation of the Black River/Springbrook Creek, Reach A. The
proposed solar light installation within existing King County Parks would qualify as
maintenance of an existing development as the proposed solar lights would
prevent a decline from a lawfully established condition as the proposed lighting
would increase safety for park visitors during low-light hours.
YES ii. The City of Renton Shoreline Master Program.
Staff Comments: A Critical Areas Technical Memorandum, prepared by ESA,
dated May 29, 2025 (Attachment D), was submitted with the application materials.
The memo concludes that the solar light installation proposed on parcel no.
1423049008 (within the shoreline jurisdiction of Springbrook Creek) would result in
no loss of ecological function of the shoreline. The light would be installed in an
area of shoreline that is unvegetated, dominated by fill, and immediately adjacent
to the paved trail. In its current state, this area of shoreline provides little to no
shoreline function, and the addition of the two-foot (2’) diameter concrete footing
would not result in a significant loss of shoreline ecological function. Therefore, no
mitigation is proposed.
The solar light installation on parcel no. 3224059005 (within the shoreline
jurisdiction of May Creek) would result in no loss of ecological function of the
shoreline. The area where the light is proposed is on the former railroad
embankment (i.e. fill), primarily unvegetated, and provides minimal, if any, buffer
function for Wetland A and/or overall shoreline ecological function. Therefore, no
shoreline ecological function would be lost and no mitigation is proposed.
The solar light installation on parcel no. 3124059004 (within the shoreline
jurisdiction of Lake Washington) would result in no loss of ecological function of
the shoreline. The light would be installed in an area of shoreline that is part of the
former railroad embankment (i.e., fill), dominated by rocks and immediately
adjacent to the paved trail. In its current state, this area of shoreline is dominated
by impervious surfaces and provides no shoreline ecological function. Therefore,
no shoreline function would be lost and no mitigation is proposed.
As the proposal would result in no net loss of ecological functions, the proposal
would be compliant with the goals and policies of the City’s adopted Shoreline
Master Program.
DECISION: The King County Parks Solar Lighting Improvement Critical Areas and Shoreline Exemption,
LUA25-000196 is Approved with Conditions*
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
City of Renton Department of Community & Economic Development Certificate of Exemption From Shoreline Substantial
King County Parks Solar Lighting Improvement, LUA25-000196, SME, CAE Development Permit and Critical Areas Regulations
Permit Date: July 21, 2025 Page 7 of 7
D_King County Solar Lights_CAE_SME_FINAL
*CONDITIONS OF APPROVAL:
1. The applicant shall restore disturbed areas immediately following the installation and schedule a
restoration inspection with the Current Planning Project Manager, Jill Ding, at jding@rentonwa.gov
or (425) 430 -6598.
2. In the event that water body or buffer disturbance occurs as a result of the proposed solar light
installation, revegetation with native vegetation would be required.
SIGNATURE & DATE OF DECISION:
_____________________________________________ ___________________________________
Matthew Herrera, Planning Director Date
RECONSIDERATION: Within 14 days of the decision date, any party may request that the decision be
reopened by the approval body. The approval body may modify his decision if material evidence not readily
discoverable prior to the original decision is found or if he finds there was misrepresentation of fact. After
review of the reconsideration request, if the approval body finds sufficient evidence to amend the original
decision, there will be no further extension of the appeal period. Any person wishing to take further action
must file a formal appeal within the 14-day appeal time frame.
APPEALS: This administrative land use decision will become final if not appealed in writing to the
Hearing Examiner on or before 5:00 PM on August 4, 2025. An appeal of the decision must be filed within
the 14-day appeal period (RCW 43.21.C.075(3); WAC 197-11-680). Appeals must be submitted
electronically to the City Clerk at cityclerk@rentonwa.gov or delivered to City Hall 1st floor Lobby Hub
Monday through Friday. The appeal fee, normally due at the time an appeal is submitted, will be collected at
a future date if your appeal is submitted electronically. The appeal submitted in person may be paid on the
first floor in our Finance Department. Appeals to the Hearing Examiner are governed by RMC 4-8-110 and
additional information regarding the appeal process may be obtained from the City Clerk’s Office,
cityclerk@rentonwa.gov.
EXPIRATION: Two (2) years from the date of decision (date signed).
ATTACHMENTS:
Attachment A: Solar Lighting Improvements 90% Plan Set
Attachment B: Project Narrative
Attachment C: Geotechnical Report, prepared by HWA GeoSciences Inc., dated May 14, 2025
Attachment D: Critical Areas Technical Memorandum, prepared by ESA, dated May 29, 2025
Attachment E: Flood Hazard Data memorandum, prepared by King County Park and Recreation
Division, dated June 17, 2025
cc: Clark Close, Current Planning Manager
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
7/21/2025 | 2:49 PM PDT
Parks and Recreation Division
Department of Natural Resources and Parks
1
June 17, 2025
Ashley Wragge,
Assistant Planner, City of Renton, Planning Division
cell 425-430-7314, office 425-430-7294
Hello Ashley,
This cover letter accompanies a geotechnical memo and a critical areas study memo required for
the Shoreline Exemption and Critical Areas Exemption to install off-grid, solar lighting at six (6)
locations in the City of Renton.
The Solar Lighting CAR – Renton.pdf (ESA, May 29, 2025) addresses the Wetland Assessment,
Standard Stream or Lake Study, and/or Biological Assessment at Eastrail and N 43rd Street, Eastrail
and N 41st Street, Eastrail at Mountain View Avenue North, Boulevard Lane Park, and Lake to
Sound Trail near Monster Road (just east of the Union Pacific RR tracks).
The KC Solar Lighting – Eastrail 5-14-25.pdf (HWA, May 14, 2025) addresses the seismic concerns
at Eastrail and N 43rd Street, Eastrail and N 41st Street, and Eastrail at Mountain View Avenue
North.
The Flood Hazard Data for Boulevard Lane Park and Lake to Sound Trail is addressed through one
additional attachment, KC Solar Lights Flood Hazard Data – Renton.pdf.
The proposal to add a solar light at Eastrail and Ripley Lane is deleted. The site has adequate
existing lighting. The original table conveyed via email on February 14, 2025, minus the Ripley Lane
site, is included below, for reference.
Thank you for taking the time to review the attached documents for permitting these solar lights. I
look forward to any clarifications or questions regarding these submittal items or the overall
application.
Tom Early
Capital Project Manager, King County Parks, CIP Section
tearly@kingcounty.gov, 206-477-7555
RECEIVED
06/18/2025 AWragge
PLANNING DIVISION
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
2
Table 1 - Site table minus Eastrail Trail at Ripley Lane (deleted)
PROJECT LOCATION CRITICAL AREAS CRITICAL AREA STUDIES
Eastrail at N 43rd
Street – on the NW
corner
Seismic
Geotechnical Report
Eastrail at N 43rd
Street – on the SW
corner
Seismic
Geotechnical Report
Eastrail at N 41st
Street – on the NE
corner
Shoreline (May Creek
reaches), Seismic,
Wetlands within 200
feet.
Geotechnical Report,
Wetland Assessment, and
Standard Stream or Lake
Study.
Eastrail at Mountain
View – on NE corner
High landslide
hazards, sensitive
slopes, Shoreline
(Lake Washington
Reaches)
Geotechnical Report and
Standard Stream or Lake
Study.
Boulevard Lane Park
– just inside the
fence from Meeker
Middle School
Flood, Seismic, Type
F, Stream within 200
feet, Wetland
Geotechnical Report, Flood
Hazard Data, Biological
Assessment, Wetland
Assessment, and Standard
Stream or Lake Study.
Lake to Sound Trail at
Railroad tracks near
Monster Road
Flood, Sensitive
Slopes, Shoreline
(Black
River/Springbrook
Creek Reaches)
Geotechnical Report, Flood
Hazard Data, Biological
Assessment, and Standard
Stream or Lake Study
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
21312 30th Dr. SE, STE. 110, Bothell, WA 98021 | 425.774.0106 | hwageo.com
May 14, 2025
HWA Project No. 2023-072-21
Concord Engineering
2285 116th Avenue NE
Bellevue, Washington 98004
Attention: Xiaoping Zhang, P.E.
Subject: GEOTECHNICAL REPORT
Engineering Services for Solar Lighting for Parks & Recreation Division
Eastrail Crossing Sites
King County, Washington
Ms. Zhang,
At your request, HWA GeoSciences Inc. (HWA) completed a site reconnaissance and review of
available geotechnical information at four proposed locations for new solar lighting at Eastrail
crossings in Renton, Washington. The four proposed lights are located at three Eastrail
crossings, as follows:
• N 43rd Street Crossing (2 lights)
• N 41st Street Crossing (1 light)
• Mountain View Avenue N Crossing (1 light)
The locations of the crossing sites are shown on Figure 1, Trail Lighting Plan. The purpose of
the work was to evaluate available surface and subsurface information to provide
recommendations for allowable lateral bearing pressures for new light foundations. At the
request of the client, no explorations were performed for this evaluation.
SURFICIAL GEOLOGY
Surficial Geology for all sites is mapped at the 1:100,000 scale in Geologic Map of Surficial
Deposits in the Seattle 30’ x 60’ Quadrangle, Washington (Yount, Minard, & Dembroff, 1993).
The crossings at N 41st Street and N 43rd Street are mapped as alluvium, likely consisting of
loose, unconsolidated clay, silt, sand, gravel and cobbles deposited by alluvial processes (creeks,
streams, rivers, etc.), sometimes containing interbedded peat or organics.
The Mountain View Avenue N crossing is mapped as recessional outwash, likely consisting of
stratified deposits of sand and gravel deposited during the retreat of the last glaciation. Pockets
of silt and clay with the possibility of organics may be encountered within this unit. Glacial till
is mapped about 100 linear feet away from the proposed solar light location. Glacial till
typically consists of very dense, unsorted mixture of clay, silt, sand, gravel, cobbles and boulders
RECEIVED
06/18/2025 AWragge
PLANNING DIVISION
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
May 14, 2025
HWA Project No. 2023-072-21
KC Solar Lighting - Eastrail 5-14-25 2 HWA GEOSCIENCES INC.
all socketed firmly together due to being previously overridden by an ice sheet over 3,000 feet
thick in this location (Thorson, 1980).
SUBSURFACE GEOLOGY
A review of available geotechnical explorations at the three sites resulted in the log of one
previous boring in the vicinity of the crossings, designated Boring 71. This boring, completed in
1963, is located approximately 160 feet south of the N 41st Street crossing. This boring was
advanced from a starting elevation of 28.4 feet to a termination depth of approximately 34 feet
below sea level. The boring log indicates an average SPT N-value of about 12 in the upper
approximately 20 feet, with soils described mostly as silty sand and sandy silt with peaty silt
layers indicated in the upper approximately 5 feet. Below a depth of about 20 feet, the N-values
increase to over 74, and the soils are described as gray sand and gravel with some silt, likely
indicating the presence of glacial till. The boring was allowed to sit overnight and fill with
water. The water level was indicated at a depth of about 5 feet.
TRAIL HISTORY
Prior to Eastrail’s conversion to a trail accommodating pedestrian and bike travel, it was a
railway known as “The Belt Line” railroad, connecting Black River Junction (located in modern
day Renton) to Woodinville, and which was completed in 1904 (Kirkland History website). Rail
service carried lumber, steel products, and coal, as well as passenger cars and other economic
goods along the eastern shore of Lake Washington. Rail service continued until the early 2000s
after which various jurisdictions along the railway acquired property to convert the alignment to
pedestrian trail.
CONCLUSIONS AND RECOMMENDATIONS
Based on visual observations made during our site reconnaissance on April 1, 2025, each of the
proposed solar light locations are within previous railroad, and currently trail, embankment fill.
Given that the fill has been in place over 120 years and serviced active trains for over 100 years,
we anticipate that the fill is densely consolidated. As such, we recommend an allowable lateral
bearing pressure of 1,500 pounds per square foot (psf) for light foundation locations founded
within embankment fill. The conditions assumed should be verified during construction and
changes made if differing conditions, or soft/organic soils, are encountered.
CONDITIONS & LIMITATIONS
We have prepared this report for Concord Engineering and King County for use in design of this
project. The conclusions and interpretations presented in this report should not be construed as
our warranty of the subsurface conditions. Experience has shown that soil and groundwater
conditions can vary significantly over small distances. As indicated previously, no explorations
were performed for this study.
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ENGINEERING SERVICES FOR SOLAR LIGHTING
FOR PARKS & RECREATION DIVISION
KING COUNTY, WASHINGTON RM/BKH
CFTRAIL LIGHTING
PLAN
2023-072-21BASE MAP PROVIDED BY: KING COUNTY DEPARTMENT OF NATURAL RESOURCES AND PARKS, SHEET TL-110, 05.01.2025
FIGURE NO.:
PROJECT NO.:
DRAWN BY:
CHECK BY:
C:\USERS\CFRY\DESKTOP\2023-072-21 KC SOLAR LIGHTING IMPROVEMENTS (EXHIBIT)\2023-072-21 KC SOLAR LIGHTING IMPROVEMENTS (EXHIBIT).DWG <1> Plotted: 5/5/2025 9:41 AM
DBE/MWBE
1
NOT TO SCALE
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2801 Alaskan Way
Suite 200
Seattle, WA 98121
206.789.9658 phone
206.789.9684 fax
esassoc.com
memorandum
date May 29, 2025
to Tom Early, Capital Project Manager, King County Department of Natural Resources and
Parks
from Jessica Redman, PWS
subject King County Climate Equity Solar Project – City of Renton
At the request of King County Department of Natural Resources and Parks (DNRP), Environmental
Science Associates (ESA) conducted a field investigation and reconnaissance of critical areas at four sites
where DNRP is proposing the installation of trail lighting as part of the Climate Equity Solar Project. The
Climate Equity Solar Project, also known as the Solar Lighting for Parks, Trails and Shelters, is an
initiative to install solar panels and energy efficient LED lighting to enhance safety for park visitors by
increasing visibility in parks, particularly during low-light hours. The project is part of a larger effort to
address community needs and create a more inclusive and safer environment for park visitors. Proposed
lights will have a base that is two feet in diameter and will be installed below the surface at a depth of
approximately nine feet. The purpose of this memorandum is to assist DNRP in the local permitting
process for the light installations with the City of Renton (City). This critical areas investigation and
reconnaissance was focused on wetlands, streams, and shorelines at the following four locations (Figure
1):
Boulevard Lane Park
Lake to Sound Trail at Monster Road
Eastrail Regional Trail at N. 41st Street
Eastrail Regional Trail at Mountain View Avenue North
This technical memorandum details the results of the reconnaissance including: wetlands, their rating
(according to Renton Municipal Code (RMC) 4-3-050G.9.a), and their buffer (according to RMC 4-3-
050G.2); streams and other aquatic areas, including their estimated typing and buffer width (according to
RMC 4-3-050G.7.a and RMC 4-3-050G.2, respectively); and shorelines (according to RMC 4-3-090).
Other critical areas, such as geological hazards and flood hazard areas are not part of this assessment, and
will be permitted, as needed, independently.
RECEIVED
06/18/2025 AWragge
PLANNING DIVISION
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Methods
Prior to conducting the site assessment, ESA biologists reviewed several existing resources regarding the
presence of critical areas. These resources included the following:
City of Renton COR Maps (City of Renton 2025)
King County Interactive Mapping tool (iMap) (King County 2025).
U.S. Fish and Wildlife Service (USFWS) National Wetlands Inventory (NWI) Mapper (USFWS
2025).
Natural Resources Conservation Service (NRCS), U.S. Department of Agriculture (USDA) Web Soil
Survey (NRCS 2025).
WDFW Priority Habitats and Species (PHS) on the Web (WDFW 2025).
Statewide Washington Integrated Fish Distribution (SWIFD) online mapping (NWIFC 2025).
Once on-site, ESA biologists assessed the entirety of the study area for the presence of critical areas. The
study area included areas within 200 feet of the proposed location of each light. Wetlands were identified
in the study area using the methods outlined in the U.S. Army Corps of Engineers Wetland Delineation
Manual (Environmental Laboratory 1987) and the regional Supplement to the Corps of Engineers
Wetland Delineation Manual; Western Mountains, Valleys, and Coast Region – Version 2.0 (USACE
2010). These methods rely on the presence of three criteria to determine wetland areas, including (1) the
dominance of wetland (i.e., hydrophytic) plant species, (2) the presence of hydric soils, and (3) indicators
of wetland hydrology such as soil saturation to the surface or water ponding. Soils, vegetation, and
hydrologic conditions were observed; however, a formal wetland delineation did not take place. The
assessment was conducted at a reconnaissance level and no official wetland data plots were established.
Therefore, soils beneath the surface were not observed and instead, in areas where hydrophytic vegetation
and wetland hydrology (e.g., surface water and/or saturation) were observed, hydric soils were assumed.
Approximate wetland boundaries were recorded using the ArcGIS Field Maps application on an Apple
iPad paired with an Eos Arrow submeter GNSS receiver. When areas of the study area were not
accessible the study team relied on USFWS NWI, King County, and City of Renton mapping.
Wetlands identified within the study area were classified using the Cowardin Classification System,
which categorizes wetlands by vegetation cover and hydrological regime (Cowardin et al. 1979).
Additionally, a preliminary assessment of each wetland’s function was completed using the Washington
State Wetland Rating System for Western Washington (Rating System) (Hruby & Yahnke 2014). The
Rating System categorizes wetlands into four hierarchical categories (Categories I to IV) based on rarity,
sensitivity to disturbance, and water quality, hydrologic, and habitat functions. The City of Renton has
codified use of the Rating System (RMC 4-3-050G.9.a) and assigns standard wetland buffer widths based
on wetland category and habitat score. Standard wetland buffer widths range from 50 feet to 200 feet
(RMC 4-3-050G.2).
ESA biologists used methods outlined in the Washington Department of Ecology’s Determining the
Ordinary High Water Mark for Shoreline Management Act Compliance in Washington State (Anderson
2016) to assess streams. If streams were observed, the boundary closest to the proposed light installation
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was recorded using a GPS unit. In areas of the study area that were not accessible, the ordinary high water
mark (OHWM) was estimated using aerial photography and LiDAR.
Findings
Two ESA biologists conducted the field investigation on April 30, 2025. Below is a summary of wetlands
and streams observed during the field investigation. A brief discussion of the regulatory implications for
critical areas at each individual site is also included.
Site 1: Boulevard Lane Park
King County DNRP is proposing to install one light at Boulevard Lane Park. The light will be installed in
the southern extent of the park property (King County Parcel # 033-3323059057), on the west side of a
walking path that connects the park and the Meeker Middle School property to the south (Figure 2).
Mapped Critical Areas
The City’s COR Maps, King County iMap, USFWS NWI, and WDFW PHS map the majority of the
Boulevard Lake Park parcel as wetland. The wetland continues offsite to the north and south and is part of
a larger wetland complex associated with Big Soos Creek. According to USFWS NWI, the wetland
complex is a mix of palustrine forested (PFO), palustrine scrub-shrub (PSS), and palustrine emergent
(PEM) cover. Big Soos Creek, which is mapped as flowing through the wetland and is a tributary to the
Green River, is mapped as a fish-bearing stream (Type F). According to SWIFD online mapping, the
reach of Big Soos Creek within the park does not contain documented salmonids. However, coho salmon
(Oncorhynchus kisutch) and coastal cutthroat trout (O. clarkii) have been documented approximately 1.6
miles downstream of the site. Additionally, Chinook salmon (O. tshawytscha), a species listed as
‘threatened’ under the Endangered Species Act, have been documented approximately 6 miles
downstream of the site.
Results of Field Assessment
One wetland was observed near the site of the proposed light installation at Boulevard Lane Park. The
wetland is a depressional wetland dominated by PFO cover and is located at the toe of a slope. The
forested canopy is dominated by willows (Salix spp.). Dominant species in the understory include
salmonberry (Rubus spectabilis), skunk cabbage (Lysichiton americanus), and soft rush (Juncus effusus).
Vegetation in upland areas immediately adjacent to the wetland is primarily mowed lawn. During the site
visit, the majority of the wetland appeared inundated and water was observed flowing out of the wetland
onto the grass lawn of the park, likely the result of beaver activity. The channel of Big Soos Creek was
not observed during the site visit and was likely out of sight to the west or not visible due to the high
inundation.
Using the Rating System, the wetland at Boulevard Lane Park scored a total of 22 points, classifying it as
a Category II wetland. The wetland provides a moderate function (7 points) for improving water quality
because it has a high cover of persistent plants and is largely inundated, both features that can aid in
trapping and filtering pollutants. The wetland also provides a high hydrological function (8 points)
because it can contain floodwaters and runoff in an area that is highly developed and produces excess
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runoff. The wetland has a moderate habitat function (7 points) because it contains diverse and multi-
structural vegetation, exhibits several hydroperiods, and contains habitat features such as snags and logs.
Regulatory Implications
Per RMC 4-3-050G.2, Category II wetlands with a moderate habitat function are required a 150-foot
buffer. Additionally, per RMC 4-3-050G.2, Type F streams are required a 115-foot buffer. Therefore, if
the stream channel of Big Soos Creek is located within the wetland, the wetland buffer would likely
extend past any stream buffer onsite.
The purpose of the proposed light is to enhance the safety of the trail that connects the Meeker Middle
School to Boulevard Lane Park. The trail is located immediately adjacent to the wetland edge; and
therefore, the light is being proposed in the wetland buffer. No direct wetland impacts are anticipated. The
area where the light is being proposed is sparsely vegetated and highly compacted from pedestrian use.
What vegetation does exist is managed, and primarily consists of mowed lawn or weedy species such as
common dandelion (Taraxacum officinale). Additionally, based on a review of LiDAR imagery, the trail,
park, and proposed location of the light are all likely established on fill that was placed to separate the
park parcel from the wetland. In its current state, the portion of the buffer where the light is proposed
provides minimal, if any, buffer function for the wetland. Therefore, the addition of the 2-foot radius
concrete footing would not result in a loss of buffer function.
Additionally, based on discussions with the City, the proposed light would likely be considered
maintenance and therefore exempt from critical areas review. Per RMC 4-3-050C.3 (Footnote 14),
“normal and routine maintenance, operation and repair of existing parks, trails, streets, roads, rights-of-
way and associated appurtenances, facilities and utilities where no alteration or additional fill materials
will be placed other than the minimum alteration and/or fill needed to restore those facilities or to
construct new trails to meet established safety standards” are exempt activities and can be permitted in
wetland and stream buffers. Additionally, the installation of illumination in a wetland and/or stream
buffer, if in a public easement, is also exempt per RMC 4-3-050C.3 (Footnote 15), which states “within
existing and improved public road rights-of-way or easements, installation, construction, replacement,
operation, overbuilding or alteration of all natural gas, cable, communication, telephone and electric
facilities, lines, pipes, mains, equipment or appurtenances, traffic control devices, illumination, walkways
and bikeways” are also exempt. Per RMC 4-3-050C.3.2, a letter of exemption must be obtained from the
Administrator prior to construction. Additionally, per RMC 4-3-050C.2.b, enhancement or mitigation
may be required for exempt activities unless waved by the Administrator. However, as discussed above,
due to the current disturbed conditions of the buffer at the proposed light location, a loss of buffer
function is not anticipated; and therefore, no mitigation is proposed. Any temporary impacts to the buffer
that may occur as a result of construction will be restored post-construction.
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Photo 1. Proposed location of light at Boulevard Lane Park
Site 2: Lake to Sound Trail at BNSF Railway Crossing
King County DNRP is proposing to install one light along the Lake to Sound Trail (Figure 3). The
proposed location is on the east side of the Burlington Northern Santa Fe (BNSF) Railway underpass
crossing, on the north side of the trail (King County Tax Parcel # 7229500330).
Mapped Critical Areas
No wetlands are mapped as occurring within 200 feet the location of the proposed light. One stream, the
Black River, is mapped in the immediate vicinity of the site. This reach of the Black River is designated
as a shoreline of the state (Type S), and is also a fish-bearing stream (Type F). According to SWIFD
mapping, this reach of the Black River has documented use of several salmonid species including
Chinook salmon, coho salmon, cutthroat trout, and steelhead trout (O. mykiss). The Black River flows
east to west through the study area, and enters the Green River approximately 400 feet downstream of the
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proposed light location. Additional species documented in the Green River include sockeye salmon (O.
nerka), pink salmon (O. gorbuscha), chum salmon (O. keta), and bull trout (Salvelinus confluentus), a
species listed as ‘threatened’ under the Endangered Species Act.
Results of Field Assessment
One stream, the Black River, was observed in the vicinity of the proposed location of the light. No
additional wetlands or streams were observed. The prosed location of the light is adjacent to the trail on
the left bank of the Black River. Within the vicinity of the proposed light, the banks of the stream are
steep and lined with large rock. During the April 30, 2025 site visit, it was estimated that the top of bank
was approximately 10 feet above the elevation of the stream. No fish were observed during the site visit;
however, the stream supports fish habitat due to its width and gradient. The area between the trail and the
river is largely unvegetated and what vegetation is present, is primarily along the portions of the bank
immediately adjacent to the stream. Vegetation here include mature black cottonwood (Populus
balsamifera), vine maple (Acer circinatum), and invasive knotweed (Polygonum spp.). Vegetation in the
area of the proposed light installation is managed and appeared to be recently cleared. Invasive tansy
ragwort (Jacobaea vulgaris) was observed sprouting here. This area also had highly compacted soils and
based on a review of aerial imagery from 1936, appears to likely be fill.
Regulatory Implications
The Black River is a Type F stream and is required a 115-foot buffer per RMC 4-3-050G.2. However, the
Black River is also designated as a ‘shoreline of the state’ and is therefore regulated under RMC 4-3-090
– Shoreline Master Program (SMP) Regulations in addition to regulations in the City’s critical areas
ordinance (CAO). Shoreline jurisdiction extends 200 feet landward of the OHWM of the river. The
location of the proposed light is approximately 40 feet landward of the OHWM; and therefore, the project
also requires review under the City’s SMP. The City classifies all of its shorelines into separate
geographic areas known as ‘use environments’ that reflect local shoreline conditions, including
environmental function, existing land uses, and the goals of the SMP. Each ‘use environment’ is
represented by its own shoreline overlay district. According to COR mapping, the proposed light is
located in the Shoreline Natural Environment Overlay District. According to the City’s Comprehensive
Plan, the purpose of this district is to protect and preserve unique and fragile shoreline or wetland
environments that are ecologically intact as close to their natural state as possible and provide areas of
wildlife sanctuary and habitat preservation (City of Renton 2025). However, based on observations made
during the site visit and a review of aerial imagery, this particular section of shoreline has been highly
modified over the past several decades through agricultural use and the development of several roads and
rail lines. Shoreline reaches to the immediate east, and designated as the Black River Riparian Forest and
Wetland, appear to be more ecologically intact.
In discussions with the City, it was determined that the light installation would likely be considered a
maintenance activity, necessary for the safety of the park users, and therefore would be permitted under a
shoreline exemption per RMC 4-9-190.C. The SMP also states that the light would be exempt from
critical areas review as exemptions in the City’s CAO, including those for maintenance activities per
RMC 4-3-050C.3 (Footnotes 14 and 15), are adopted by reference per RMC 4-3-090D.2c; and therefore
also apply to critical areas in the shoreline. A shoreline exemption does not exempt the project from
having to comply with the City’s SMP. Instead, a shoreline exemption allows projects that are considered
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to be small-scale and/or have minimal environmental impacts, to be constructed without a formal
shoreline substantial development permit. Additionally, per RMC 4-3-090D.2.a.i, “development in the
shoreline shall be carried out in a manner that prevents or mitigates adverse impacts to ensure no net
loss of ecological functions and processes.” No loss of ecological function of the shoreline is anticipated
as a result of the light installation. The light will be installed in an area of shoreline that is unvegetated,
dominated by fill, and immediately adjacent to the paved trail. In its current state, this area of shoreline
provides little to no shoreline function, and the addition of the 2-foot radius concrete footing would not
result in a significant loss of shoreline ecological function. Therefore, no mitigation is proposed.
Photo 2. Proposed location of light at Lake to Sound Trail at BNSF Railway Crossing
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Site 3: Eastrail Regional Trail at N. 41st Street
King County DNRP is proposing to install one light along the Eastrail Regional Trail at the N. 41st Street
crossing, on the northeast side of the trail (King County Tax Parcel 3224059005) (Figure 4).
Mapped Critical Areas
No wetlands are mapped as occurring in the immediate vicinity of the location of the proposed light. The
closest wetland is mapped by the City’s COR Maps, which show one wetland, approximately 180 feet
northeast of the site, on the east side of Lake Washington Boulevard.
One stream, May Creek, is mapped as crossing under the Eastrail Regional Trail approximately 310 feet
north of the proposed light location. The stream flows southeast to northwest under the trail, before
flowing to the south, where it flows past the project area at a distance of approximately 130 feet. May
Creek then continues to flow south and eventually into Lake Washington, approximately 1,000 feet
southwest of the project area. This reach of May Creek is designated as a shoreline of the state (Type S),
and is also a fish-bearing stream (Type F). According to SWIFD mapping, this reach of May Creek has
documented use of several salmonid species including steelhead trout, sockeye salmon, coho salmon,
Chinook salmon, and cutthroat trout.
Results of Field Assessment
Wetlands
Three wetlands were observed within 200 feet of the location of the proposed light at the N. 41st Street
crossing of the Eastrail Regional Trail. Wetlands A and B are depressional PFO wetlands. Wetland A is
located approximately 45 feet northwest of the proposed light and Wetland B is located approximately 95
feet southwest of the proposed light, on the south side of N. 41st Street. Both wetlands are dominated by
an overstory of black cottonwood trees. Soft rush and reed canarygrass dominate the understory of
Wetland A and Wetland B, respectively. No active hydrology was observed during the April 30, 2025 site
visit; however, water stained leaves were observed in both wetlands indicating hydrology. Hydrological
inputs are primarily precipitation and stormwater runoff from the adjacent trail and roads.
The wetland mapped by the City’s COR Maps on the southeast side of Lake Washington Blvd. N, was
not accessible in the field and only observed from the right-of-way. This wetland appeared to be a
depressional PFO wetland dominated by black cottonwood and is located at the toe of a slope. No
hydrology was observed; however, likely hydrologic inputs include precipitation, a high groundwater
table, and sheetflow from the adjacent hillside to the south.
Using the Rating System, both Wetlands A and B scored a total of 19 points, classifying it as a Category
III wetland. These wetlands provides a moderate function (7 points) for improving water quality because
they have a high cover of persistent plants that can trap and filter pollutants. They are also located
adjacent to roads and other developed areas that produce excess pollutants. The wetlands also provide a
high hydrological function (8 points) because they can detain floodwaters and runoff in an area that is
highly developed. Wetlands A and B have a low habitat function (4 points) because they do not contain
diverse and/or multi-structural vegetation and do not contain habitat features such as snags and logs.
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Offsite Wetland C scored 17 points, and is also classified as a Category III wetland. The wetland provides
a moderate score (6 points) for water quality functions because it has a high cover of persistent vegetation
that can aid in filtering pollutants. However, the contributing basin is largely undeveloped forest that does
not produce an excess of pollutants. It also provides a moderate hydrologic function (6 points) because it
is located upgradient of May Creek, where flooding issues have been documented downstream. Offsite
Wetland C also provides a moderate habitat function (5 points) because it provides habitat features such
as snags and downed wood and provides a forested corridor in a largely developed landscape that
organisms can use for foraging and refuge.
Streams
One stream, May Creek, was observed during the site visit. The closest point to the stream from the
proposed light is approximately 125 feet to the northwest. At this point, the stream is approximately 35
feet wide. The banks are dominated by native vegetation including black cottonwood and red alder (Alnus
rubra). Snowberry (Symphoricarpos albus), creeping buttercup (Ranunculus repens), and reed
canarygrass were also observed. No fish were observed during the site visit; however, the stream supports
fish habitat due to its width and gradient.
Regulatory Implications
Wetlands
Per RMC 4-3-050G.2, Category III wetlands with a low habitat function (Wetlands A and B) are required
a 75-foot buffer and Category III wetlands with a low habitat function (Offsite Wetland C) are required a
100-foot buffer. However, per RMC 4-3-050G.2 (Footnote 6), “areas that are functionally and effectively
disconnected from the wetland by a permanent road or other substantially developed surface of sufficient
width and with use characteristics such that buffer functions are not provided shall not be counted toward
the minimum buffer.” Therefore, the project will have no impacts to the buffers of Wetland B or Offsite
Wetland C, which are separated from the proposed location of the light by roads, but will have an impact
on the buffer of Wetland A.
May Creek is a Type F stream and is required a 115-foot buffer per RMC 4-3-050G.2. However, the
proposed location of the light is outside the buffer of May Creek. Additionally, May Creek is designated
as a ‘shoreline of the state’ and is therefore regulated under the City’s SMP Regulations (RMC 4-3-090).
Shoreline jurisdiction extends 200 feet landward of the OHWM of the river. The location of the proposed
light is approximately 130 feet landward of the OHWM; and therefore, the project also requires review
under the City’s SMP. According to COR mapping, the proposed light is located in the Shoreline Single
Family Residential Overlay District. According to the City’s Comprehensive Plan, the purpose of this
district is to accommodate residential development and appurtenant structures that are consistent with the
City’s SMP (City of Renton 2025).
In discussions with the City, it was determined that the light installation would likely be considered a
maintenance activity, necessary for the safety of trail users, and therefore would be permitted under a
shoreline exemption per RMC 4-9-190.C. The SMP also states that the light would be exempt from
critical areas review as exemptions in the City’s CAO, including those for maintenance activities per
RMC 4-3-050C.3 (Footnotes 14 and 15), are adopted by reference per RMC 4-3-090D.2c; and therefore
also apply to critical areas in the shoreline. A shoreline exemption does not exempt the project from
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having to comply with the City’s SMP. Instead, a shoreline exemption allows projects that are considered
to be small-scale and/or have minimal environmental impacts, to be constructed without a formal
shoreline substantial development permit. Additionally, per RMC 4-3-090D.2.a.i, “development in the
shoreline shall be carried out in a manner that prevents or mitigates adverse impacts to ensure no net loss
of ecological functions and processes.” No loss of ecological function of the shoreline is anticipated as a
result of the light installation. The area where the light is proposed is on the former railroad embankment
(i.e. fill), primarily unvegetated, and provides minimal, if any, buffer function for Wetland A and/or
overall shoreline ecological function. Therefore, no shoreline ecological function will be lost and no
mitigation is proposed.
Photo 3. Proposed location of light at Eastrail Regional Trail at N. 41st Street
Site 4: Eastrail Regional Trail at Mountain View Avenue North
King County DNRP is proposing to install one light along the Eastrail Regional Trail at the Mountain
View Avenue North. crossing, on the northeast side of the trail (King County Tax Parcel #3124059004).
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Mapped Critical Areas
No wetlands or streams are mapped as occurring within the vicinity of the proposed location of the light.
However, Lake Washington, ‘a shoreline of statewide significance,’ is approximately 150 feet to the west.
Results of Field Assessment
One wetland was observed in a ditch adjacent to the trail, approximately 60 feet south of the proposed
light location, on the south side of Mountain View Avenue North. The wetland is a depressional, PEM
wetland that is dominated by reed canarygrass. Soils appeared to be saturated to the surface. Hydrological
inputs are likely precipitation and stormwater runoff from the Eastrail Regional Trail and Lake
Washington Boulevard North.
Using the Rating System, the wetland south of the Mountain View Avenue North site scored a total of 16
points, classifying it as a Category III wetland. The wetland provides a moderate function (6 points) for
improving water quality because it has a high cover of persistent plants and seasonally inundated, both
features that can trap and filter pollutants. It is also adjacent to a road, which is a source of pollutants
during rain events. The wetland also provides a moderate hydrological function (6 points) because it can
detain floodwaters and runoff ; however, there are no issues with flooding downstream so this function is
limited. The wetland has a low habitat function (4 points) because it does not contain diverse and/or
multi-structural vegetation and does not contain habitat features such as snags and logs.
Regulatory Implications
Per RMC 4-3-050G.2, Category III wetlands with a moderate habitat function are required a 75-foot
buffer. The proposed location of the light is approximately 60 feet north of the wetland; and therefore,
would be within the wetland buffer. However, per RMC 4-3-050G.2 (Footnote 6), “areas that are
functionally and effectively disconnected from the wetland by a permanent road or other substantially
developed surface of sufficient width and with use characteristics such that buffer functions are not
provided shall not be counted toward the minimum buffer.” The wetland buffer is intersected by
Mountain View Avenue North, a heavily traveled, asphalt road that provides no buffer function.
Therefore, the wetland buffer would end at the south side of the road and any impacts north of the road
would be outside of the wetland boundary.
Lake Washington is designated as a ‘shoreline of statewide significance’ and is therefore regulated under
the City’s SMP Regulations (RMC 4-3-090). Shoreline jurisdiction extends 200 feet landward of the
OHWM of the Lake. The location of the proposed light is approximately 150 feet landward of the
OHWM; and therefore, the project also requires review under the City’s SMP (RMC 4-3-090)
regulations. According to the City’s COR mapping, the proposed light is located in the Shoreline Single
Family Residential Overlay District. According to the City’s Comprehensive Plan, the purpose of this
district is to accommodate residential development and appurtenant structures that are consistent with the
City’s SMP (City of Renton 2025).
In discussions with the City, it was determined that the light installation would likely be considered a
maintenance activity, necessary for the safety of trail users, and therefore would be permitted under a
shoreline exemption per RMC 4-9-190.C. The SMP also states that the light would be exempt from
critical areas review as exemptions in the City’s CAO, including those for maintenance activities per
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RMC 4-3-050C.3 (Footnotes 14 and 15), are adopted by reference per RMC 4-3-090D.2c; and therefore
also apply to critical areas in the shoreline. A shoreline exemption does not exempt the project from
having to comply with the City’s SMP. Instead, a shoreline exemption allows projects that are considered
to be small-scale and/or have minimal environmental impacts, to be constructed without a formal
shoreline substantial development permit. Additionally, per RMC 4-3-090D.2.a.i, “development in the
shoreline shall be carried out in a manner that prevents or mitigates adverse impacts to ensure no net
loss of ecological functions and processes.” No loss of ecological function of the shoreline is anticipated
as a result of the light installation. The light will be installed in an area of shoreline that is part of the
former railroad embankment (i.e., fill), dominated by rocks and immediately adjacent to the paved trail. In
its current state, this area of shoreline is dominated by impervious surfaces and provides no shoreline
ecological function. Therefore no shoreline function will be lost and no mitigation is proposed.
Photo 4. Proposed location of light at Eastrail Regional Trail at Mountain View Avenue North
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King County Climate Equity Solar Project – City of Renton
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References
Anderson, P.S., Susan Meyer, Dr. Patricia Olsen, and Erik Stockdale. 2016. Determining the Ordinary
High-Water Mark for Shoreline Management Act Compliance in Washington State. Ecology
Publication no. 16-06-029. Department of Ecology, Olympia, WA. October 2016.
Brinson, M.M. 1993. A Hydrogeomorphic Classification for Wetlands. URL: https://erdclibrary. URL:
erdc.dren.mil/jspui/bitstream/11681/6483/1/TR-WRP-DE-4.pdf. Accessed: April 2025.
City of Renton. 2025. City of Renton (COR) Map. 2025. URL:
https://maps.rentonwa.gov/Html5viewer/Index.html?viewer=cormaps. Accessed April 2025.
Corps (U.S. Army Corps of Engineers). 2010. Regional Supplement to the Corps of Engineers Wetland
Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0). ERDC/EL
TR-10-3. U.S. Army Engineer Research and Development Center, Vicksburg, MS.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater
Habitats of the United States. Publication #FWS/OBS-79/31. United States Department of the
Interior, Fish and Wildlife Service, Office of Biological Services, Washington, D.C.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-
87-1. U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
Hruby, T., and A. Yahnke. 2023. Washington State Wetland Rating System for Western Washington
Version 2.0: 2014 Update. Publication #32-06-009. Washington Department of Ecology,
Olympia, WA.
King County. 2025. iMap – online mapping. URL: https://gismaps.kingcounty.gov/iMap/. Accessed:
April 2025.
King County. 2024. 2024 King County Comprehensive Plan. URL:
https://kingcounty.gov/en/dept/executive/governance-leadership/performance-strategy-
budget/regional-planning/king-county-comprehensive-plan/current-adopted-plan. Accessed May
2025.
NRCS (Natural Resources Conservation Service). 2025. Web Soil Survey. URL:
http://websoilsurvey.sc.egov.usda.gov/. Accessed: April 2024.
NWIFC (Northwest Indian Fisheries Commission). 2025. Statewide Washington Integrated Fish
Distribution (SWIFD). URL: https://geo.wa.gov/datasets/wdfw::statewide-washington-integrated-
fish-distribution/explore. Accessed: April 2025.
USFWS (U.S. Fish and Wildlife Service). 2025. National Wetlands Inventory Wetland Mapper. URL:
https://www.fws.gov/wetlands/Data/Mapper.html. Accessed: April 2025.
WDFW (Washington Department of Fish and Wildlife). 2025. Priority Habitats and Species (PHS) on the
Web. URL: https://geodataservices.wdfw.wa.gov/hp/phs/. Accessed April 2025.
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Attachment 1:
Figures
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Attachment 2:
Additional Photos
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Wetland at Boulevard Lane Park near light, looking west
Wetland at Boulevard Lane Park near light, looking north
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Unvegetated shoreline at Lake to Sound Trail and BNSF Crossing
Wetland A at Eastrail Regional Trail and N 41st Street, looking north
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland A at Eastrail Regional Trail and N 41st Street, looking south
May Creek near Eastrail Regional Trail and N 41st Street
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland at Eastrail Regional Trail and Mountain View Road, looking south (Source: Google Maps)
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Attachment 3:
Preliminary Wetland Rating Forms
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1. Category of wetland based on FUNCTIONS
[ ] Category I - Total score = 23 - 27
[ ] Category II - Total score = 20 - 22
[X] Category III - Total score = 16 - 19
[ ] Category IV - Total score = 9 - 15
FUNCTION Improving Water
Quality Hydrologic Habitat
Site Potential M M L
Landscape Potential M H M
Value H H L Total
Score Based on
Ratings 7 8 4 19
Score for each
function based on
three ratings (order
of ratings is not
important)
9 = H,H,H
8 = H,H,M
7 = H,H,L
7 = H,M,M
6 = H,M,L
6 = M,M,M
5 = H,L,L
5 = M,M,L
4 = M,L,L
3 = L,L,L
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine
Wetland of High Conservation Value
Bog
Forested
Coastal Lagoon
Interdunal
None of the above Not Applicable
Wetland name or number: 41st St Crossing - Wetland A
RATING SUMMARY - Western Washington
Name of wetland (or ID#): 41st St Crossing - Wetland A Date of site visit: 05/19/2025
Rated By: Maggie Bradshaw Trained by Ecology? Yes [X] No [ ] Date of Training: 03/12/2021
HGM Class used for rating: Depressional
Wetland has multiple HGM classes? Yes [X] No [ ]
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map:
OVERALL WETLAND CATEGORY: [Category III] (based on functions [X] or special characteristics [ ])
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…1/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
Maps and figures required to answer questions correctly for Western Washington
Depressional Wetlands
Map of:To answer
questions:
Figure
#
Cowardin plant classes D 1.3, H 1.1, H 1.4
Hydroperiods D 1.4, H 1.2
Location of outlet (can be added to map of hydroperiods)D 1.1, D 4.1
Boundary of area within 150 ft of the wetland (can be added to another figure)D 2.2, D 5.2
Map of the contributing basin D 4.3, D 5.3
1km Polygon: Area that extends 1km from entire wetland edge - including polygons for
accessible habitat and undisturbed habitat H 2.1, H 2.2, H 2.3
Screen capture of map of 303(d) listed waters in basin (from Ecology website)D 3.1, D 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web)D 3.3
5/27/25, 2:54 PM Wetland Rating Summary
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Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0 Does the site have the potential to improve water quality?
D 1.1 What are the characteristics of surface water outflows from the wetland?
Wetland has no surface water outlet.points = 3
Wetland has an intermittently flowing, or highly constricted, outlet.points = 2
Wetland has an unconstricted, or slightly constricted, surface outlet that is
permanently flowing points = 1
Wetland is a flat depression whose outlet is a permanently flowing ditch.points = 1 Score: 3
D 1.2 Is the soil 2 in. below the surface a true clay or organic soil?
Mapped as true clay or organic (muck or peat)points = 4
Soil texture identified as clay or organic in field points = 4
Soil texture identified as clay or organic by laboratory test points = 4
None of the above points = 0 Score: 0
D 1.3 What are the characteristics and distribution of persistent plants?
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > 50% of area points = 3
Wetland has persistent, ungrazed plants > 10% of area points = 1
Wetland has persistent, ungrazed plants < 10% of area points = 0 Score: 5
D 1.4 What are the characteristics of seasonal ponding or inundation in the wetland area?
Area seasonally ponded is > 50% total area of wetland points = 4
Area seasonally ponded is equal to or > 25% total area of wetland points = 2
Area seasonally ponded is < 25% total area of wetland points = 0 Score: 0
Total for D 1:8
Rating of Site Potential [ ] 12-16 = H [X] 6-11 = M [ ] 0-5 = L Record the rating on the first page
D 2.0 Does the landscape have the potential to support the water quality function of the site?
D 2.1 Does the wetland unit receive stormwater discharges?
Yes points = 1
No points = 0 Score: 1
D 2.2 Is >10% of the area within 150ft of the wetland in land uses that generate pollutants in surface runoff?
Yes points = 1
No points = 0 Score: 1
D 2.3 Are there septic systems within 250ft of the wetland?
Yes points = 1
No points = 0 Score: 0
D 2.4 Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3?
Yes points = 1
No points = 0 Score: 0
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…3/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
D 2.5 What are the other sources of pollutants coming into the wetland?
Total for D 2:2
Rating of Landscape Potential [ ] 3-4 = H [X] 1-2 = M [ ] 0 = L Record the rating on the first page
D 3.0 Is the water quality improvement provided by the site valuable to society?
D 3.1 Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the 303(d)
list?
Yes points = 1
No points = 0 Score: 1
D 3.2 Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
Yes points = 1
No points = 0 Score: 1
D 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality?
Yes points = 2
No points = 0 Score: 0
Total for D 3:2
Rating of Value [X] 2-4 = H [ ] 1 = M [ ] 0 = L Record the rating on the first page
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream
degradtion
D 4.0 Does the site have the potential to reduce flooding and erosion?
D 4.1 What are the characteristics of surface water outflows from the wetland?
Wetland has no surface water outlet.points = 4
Wetland has an intermittently flowing, or highly constricted, outlet.points = 2
Wetland is a flat depression whose outlet is a permanently flowing ditch.points = 1
Wetland has an unconstricted, or slightly constricted, surface outlet that is
permanently flowing points = 0 Score: 4
D 4.2 What is the depth of storage during the wet periods?
Marks of ponding are 3ft or more above the surface or bottom of the outlet.points = 7
Marks of ponding are between 2ft to <3ft from the surface or bottom of the outlet.points = 5
Marks of ponding are at least 0.5ft to <2ft from the surface or the bottom of the
outlet.points = 3
The wetland is a "headwater" wetland.points = 3
The wetland is flat but has small depressions on the surface that trap water.points = 1
Marks of ponding are less than 0.5ft (6in).points = 0 Score: 0
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…4/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
D 4.3 What is the contribution of the wetland to storage in the watershed?
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5 Score: 3
Total for D 4:7
Rating of Site Potential [ ] 12-16 = H [X] 6-11 = M [ ] 0-5 = L Record the rating on the first page
D 5.0 Does the landscape have the potential to support hydrologic functions of the site?
D 5.1 Does the wetland unit receive stormwater discharges?
Yes points = 1
No points = 0 Score: 1
D 5.2 Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes points = 1
No points = 0 Score: 1
D 5.3 Is more than 25% of the contributing basin of the wetland covered with intensive human land uses?
Yes points = 1
No points = 0 Score: 1
Total for D 5:3
Rating of Landscape Potential [X] 3 = H [ ] 1-2 = M [ ] 0 = L Record the rating on the first page
D 6.0 Are the hydrologic functions provided by the site valuable to society?
D 6.1 Is the wetland in a landscape that has flooding problems?
Flooding occurs in a sub-basin that is immediately down-gradient of the wetland.points = 2
Surface flooding problems are in a sub-basin farther down-gradient.points = 1
Flooding from groundwater is an issue in the basin.points = 1
The existing or potential outflow from the wetland is so constrained that water
cannot reach areas that flood.points = 0
There are no problems with flooding downstream of the wetland.points = 0 Score: 2
D 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
Yes points = 2
No points = 0 Score: 0
Total for D 6:2
Rating of Value [X] 2-4 = H [ ] 1 = M [ ] 0 = L Record the rating on the first page
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…5/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
HABITAT FUNCTIONS
These questions apply to wetlands of all HGM classes - Indicators that the site functions to
provide important habitat
H 1.0 Does the wetland have the potential to provide habitat for many species?
H 1.1 What is the structure of the plant community?
Aquatic Bed
Emergent
Scrub-shrub
Forested
Multiple strata within the Forested class (canopy, sub-canopy, shrubs,
herbaceous, moss/ground cover)
4 structures or more points = 4
3 structures points = 2
2 structures points = 1
1 structure points = 0
No structures present points = 0 Score: 0
H 1.2 What are the hydroperiods that meet the size thresholds in the wetland?
Permanently flooded or inundated
Seasonally flooded or inundated
Occasionally flooded or inundated
Saturated only
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland
Freshwater Tidal wetland
4 or more types present points = 3
3 types present or Lake Fringe / Freshwater Tidal Fringe points = 2
2 types present points = 1
1 type present points = 0
None present points = 0 Score: 1
H 1.3 What is the richness of the plant species in the wetland?
>19 species points = 2
5-19 species points = 1
<5 species points = 0 Score: 1
✔
✔
✔
5/27/25, 2:54 PM Wetland Rating Summary
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Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
H 1.4 What is the interspersion of habitats?
High points = 3
Moderate points = 2
Low points = 1
None points = 0 Score: 0
H 1.5 What are the special habitat features in the wetland?
Large, downed, woody debris within the wetland (>4in diameter and 6ft long).
Standing snags (dbh >4in) within the wetland
Undercut banks are present for at least 6.6ft (2m) and/or overhanging plants
extend at least 3.3ft (1m) over open water or a stream (or ditch) in, or contiguous
with the wetland, for at least 33ft (10m)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (>30 degree slope) OR signs of recent beaver activity are present (cut shrubs
or trees that have not yet weathered where wood is exposed)
At least 0.25ac of thin-stemmed persistent plants or woody branches are present
in areas that are permanently or seasonally inundated (structures for egg-laying by
amphibians)
Invasive plants cover less than 25% of the wetland area in every stratum of plants
(see H 1.1 for list of strata)
6 habitats selected points = 6
5 habitats selected points = 5
4 habitats selected points = 4
3 habitats selected points = 3
2 habitats selected points = 2
1 habitat selected points = 1
No habitats selected points = 0 Score: 0
Total for H 1:2
Rating of Site Potential [ ] 15-18 = H [ ] 7-14 = M [X] 0-6 = L Record the rating on the first page
H 2.0 Does the landscape have the potential to support habitat functions of the site?
H 2.1 What is the percentage of accessible habitat within 1km of the wetland?
>33% of 1km Polygon points = 3
20-33% of 1km Polygon points = 2
10-19% of 1km Polygon points = 1
<10% of 1km Polygon points = 0 Score: 0
H 2.2 What is the percentage of total habitat in a 1km polygon around the wetland?
Total habitat is >50% of the Polygon points = 3
Total habitat is 10-50% of the Polygon and in 1-3 patches points = 2
Total habitat is 10-50% of the Polygon and in >3 patches points = 1
Total habitat is <10% of the Polygon points = 0 Score: 1
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…7/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
H 2.3 What is the land use intensity in the 1km polygon?
50% of the Polygon is high intensity land use points = -2
<50% of the Polygon is high intensity land use points = 0 Score: 0
Total for H 2:1
Rating of Landscape Potential [ ] 4-6 = H [X] 1-3 = M [ ] 0 = L Record the rating on the first page
H 3.0 Is the habitat provided by the site valuable to society?
H 3.1 Does the site provide habitat for species valued in laws, regulations, or policies?
Aspen Stands
Biodiversity Areas and Corridors
Herbaceous Balds
Old-growth/Mature Forests
Oregon White Oak
Riparian
Westside Prairie
Fresh Deepwater
Instream
Nearshore (Coastal, Open Coast, Puget Sound)
Caves
Cliffs
Snags and Logs
Talus
The following criteria automatically score 2 points:
The wetland provides habitat for Threatened or Endangered species
The wetland is mapped as a location for an individual WDFW priority species
The wetland is a Wetland of High Conservation Value
The wetland has been categorized as an important habitat site in a local plan
The wetland has 3 or more WDFW priority habitats within 100m, or meets the
criteria for societal value points = 2
The site has 1 or 2 WDFW priority habitats within 100m points = 1
The site does not meet any of the criteria for societal value points = 0 Score: 0
Total for H 3:0
Rating of Value [ ] 2 = H [ ] 1 = M [X] 0 = L Record the rating on the first page
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…8/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
SC 1.0 Estuarine Wetlands
SC 1.1 Does the wetland meet all of the following criteria for Estuarine wetlands?
The dominant water regime is tidal
The wetland is vegetated
The water salinity is greater than 0.5 ppt
Yes - Go to SC 1.2
No - Not an Estuarine Wetland Result: Not an
Estuarine Wetland
SC 1.2 Is the wetland within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area Preserve,
State Park or Educational, Environmental, or Scientific Reserve designated under WAC 332-30-151?
Yes - Category I Estuarine Wetland
No - Go to SC 1.3 Result:
SC 1.3 Is the wetland unit at least 1ac in size and meets at least two of the following three conditions?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and
has less than 10% cover of non-native plant species.
At least 75% of the landward edge of the wetland has a 100ft buffer of shrub, forest, or un-
grazed or un-mowed grassland
The wetland has at least two of the following features: tidal channels, depressions with open
water, or contiguous freshwater wetlands.
Yes - Category I Estuarine Wetland
No - Category II Estuarine Wetland Result:
SC 2.0 Wetlands of High Conservation Value
SC 2.1 Does the wetland overlap with any known or historical rare plant or rare & high-quality ecosystem polygons on the
WNHP Data Explorer?
Yes - Category I Wetland of High Conservation Value
No - Go to SC 2.2 Result: Go to SC 2.2
SC 2.2 Does the wetland have a rare plant species, rare plant community, or high-quality common plant community that
may qualify the site as a WHCV?
Yes - Category I Wetland of High Conservation Value
No - Not a Wetland of High Conservation Value Result:
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wetl…9/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
SC 3.0 Bogs
SC 3.1 Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16in or
more of the first 32in of the soil profile?
Yes - Go to SC 3.3
No - Go to SC 3.2 Result: Go to SC 3.2
SC 3.2 Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep over
bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or pond?
Yes - Go to SC 3.3
No - Not a Bog Wetland Result:
SC 3.3 Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least 30% cover
of plant species listed in the table provided in the instructions?
Yes - Category I Bog Wetland
No - Go to SC 3.4 Result:
SC 3.4 Is an area with peats or mucks forested (>30% cover) with Sitka spruce, subalpine fir, western red cedar, western
hemlock, lodgepole pine, quaking aspen, Engelmann Spruce, or western white pine AND any of the species (or
combinations of species) listed in the table found in the instructions provide more than 30% of the cover under the
canopy?
Yes - Category I Bog Wetland
No - Not a Bog Wetland Result:
SC 4.0 Forested Wetlands
SC 4.1 Does the wetland have at least 1 contiguous acre of forest that meets one of the following criteria?
Old-growth forests
Mature forests
Yes - Category I Forested Wetland
No - Not a Forested Wetland Result: Not a Forested
Wetland
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wet…10/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
SC 5.0 Wetlands in Coastal Lagoons
SC 5.1 Coastal Lagoons: Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or rocks
The depression in which the wetland is located contains ponded water that is saline or
brackish (>0.5 ppt) during most of the year in at least a portion of the open water area (measured
near the bottom)
The lagoon retains some of its surface water at low tide during spring tides
Yes - Go to SC 5.2
No - Not a Coastal Lagoon Wetland Result: Not a Coastal
Lagoon Wetland
SC 5.2 Does the wetland meet all of the following three conditions?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and
has less than 20% cover of aggressive, opportunistic plant species (see list of species).
At least 75% of the landward edge of the wetland has a 100ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
the wetland is larger than 0.10ac (4350 sqft)
Yes - Category I Coastal Lagoon
No - Category II Coastal Lagoon Result:
SC 6.0 Interdunal Wetlands
SC 6.1 Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership WBUO)?
Yes - Go to SC 6.2
No - Not an Interdunal Wetland Result: Not an
Interdunal Wetland
SC 6.2 Is the wetland 1ac or larger in size, or a mosaic that is 1ac or larger in size?
Wetland is larger than 1ac in size - Go to SC 6.3
Wetland is a mosaic larger than 1ac is size - Category II Interdunal Wetland
No - Go to SC 6.4 Result:
SC 6.3 Does the wetland score 8 or 9 points for the habitat functions?
Yes - Category I Interdunal Wetland
No - Category II Interdunal Wetland Result:
SC 6.4 Is the wetland unit between 0.1ac and 1ac, or in a mosaic of wetlands that is between 0.1ac and 1ac in size?
Yes - Category III Interdunal Wetland
No - Category IV Interdunal Wetland Result:
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wet…11/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St Crossing - Wetland A
Category of wetland based on Special Characteristics
If you answered No for all types, enter "Not Applicable" on Summary Form Final Category: Not
Applicable
5/27/25, 2:54 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3380&WetlandName=41st St Crossing - Wetland A&Wet…12/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
1. Category of wetland based on FUNCTIONS
[ ] Category I - Total score = 23 - 27
[ ] Category II - Total score = 20 - 22
[X] Category III - Total score = 16 - 19
[ ] Category IV - Total score = 9 - 15
FUNCTION Improving Water
Quality Hydrologic Habitat
Site Potential M M L
Landscape Potential M H M
Value H H L Total
Score Based on
Ratings 7 8 4 19
Score for each
function based on
three ratings (order
of ratings is not
important)
9 = H,H,H
8 = H,H,M
7 = H,H,L
7 = H,M,M
6 = H,M,L
6 = M,M,M
5 = H,L,L
5 = M,M,L
4 = M,L,L
3 = L,L,L
2. Category based on SPECIAL CHARACTERISTICS of wetland
CHARACTERISTIC CATEGORY
Estuarine
Wetland of High Conservation Value
Bog
Forested
Coastal Lagoon
Interdunal
None of the above Not Applicable
Wetland name or number: 41st St - Wetland B
RATING SUMMARY - Western Washington
Name of wetland (or ID#): 41st St - Wetland B Date of site visit: 05/19/2025
Rated By: Maggie Bradshaw Trained by Ecology? Yes [X] No [ ] Date of Training: 03/12/2021
HGM Class used for rating: Depressional
Wetland has multiple HGM classes? Yes [ ] No [X]
NOTE: Form is not complete without the figures requested (figures can be combined).
Source of base aerial photo/map:
OVERALL WETLAND CATEGORY: [Category III] (based on functions [X] or special characteristics [ ])
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…1/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
Maps and figures required to answer questions correctly for Western Washington
Depressional Wetlands
Map of:To answer
questions:
Figure
#
Cowardin plant classes D 1.3, H 1.1, H 1.4
Hydroperiods D 1.4, H 1.2
Location of outlet (can be added to map of hydroperiods)D 1.1, D 4.1
Boundary of area within 150 ft of the wetland (can be added to another figure)D 2.2, D 5.2
Map of the contributing basin D 4.3, D 5.3
1km Polygon: Area that extends 1km from entire wetland edge - including polygons for
accessible habitat and undisturbed habitat H 2.1, H 2.2, H 2.3
Screen capture of map of 303(d) listed waters in basin (from Ecology website)D 3.1, D 3.2
Screen capture of list of TMDLs for WRIA in which unit is found (from web)D 3.3
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…2/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
DEPRESSIONAL AND FLATS WETLANDS
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0 Does the site have the potential to improve water quality?
D 1.1 What are the characteristics of surface water outflows from the wetland?
Wetland has no surface water outlet.points = 3
Wetland has an intermittently flowing, or highly constricted, outlet.points = 2
Wetland has an unconstricted, or slightly constricted, surface outlet that is
permanently flowing points = 1
Wetland is a flat depression whose outlet is a permanently flowing ditch.points = 1 Score: 3
D 1.2 Is the soil 2 in. below the surface a true clay or organic soil?
Mapped as true clay or organic (muck or peat)points = 4
Soil texture identified as clay or organic in field points = 4
Soil texture identified as clay or organic by laboratory test points = 4
None of the above points = 0 Score: 0
D 1.3 What are the characteristics and distribution of persistent plants?
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > 50% of area points = 3
Wetland has persistent, ungrazed plants > 10% of area points = 1
Wetland has persistent, ungrazed plants < 10% of area points = 0 Score: 5
D 1.4 What are the characteristics of seasonal ponding or inundation in the wetland area?
Area seasonally ponded is > 50% total area of wetland points = 4
Area seasonally ponded is equal to or > 25% total area of wetland points = 2
Area seasonally ponded is < 25% total area of wetland points = 0 Score: 0
Total for D 1:8
Rating of Site Potential [ ] 12-16 = H [X] 6-11 = M [ ] 0-5 = L Record the rating on the first page
D 2.0 Does the landscape have the potential to support the water quality function of the site?
D 2.1 Does the wetland unit receive stormwater discharges?
Yes points = 1
No points = 0 Score: 1
D 2.2 Is >10% of the area within 150ft of the wetland in land uses that generate pollutants in surface runoff?
Yes points = 1
No points = 0 Score: 1
D 2.3 Are there septic systems within 250ft of the wetland?
Yes points = 1
No points = 0 Score: 0
D 2.4 Are there other sources of pollutants coming into the wetland that are not listed in questions D 2.1-D 2.3?
Yes points = 1
No points = 0 Score: 0
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…3/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
D 2.5 What are the other sources of pollutants coming into the wetland?
Total for D 2:2
Rating of Landscape Potential [ ] 3-4 = H [X] 1-2 = M [ ] 0 = L Record the rating on the first page
D 3.0 Is the water quality improvement provided by the site valuable to society?
D 3.1 Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the 303(d)
list?
Yes points = 1
No points = 0 Score: 1
D 3.2 Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
Yes points = 1
No points = 0 Score: 1
D 3.3 Has the site been identified in a watershed or local plan as important for maintaining water quality?
Yes points = 2
No points = 0 Score: 0
Total for D 3:2
Rating of Value [X] 2-4 = H [ ] 1 = M [ ] 0 = L Record the rating on the first page
DEPRESSIONAL AND FLATS WETLANDS
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream
degradtion
D 4.0 Does the site have the potential to reduce flooding and erosion?
D 4.1 What are the characteristics of surface water outflows from the wetland?
Wetland has no surface water outlet.points = 4
Wetland has an intermittently flowing, or highly constricted, outlet.points = 2
Wetland is a flat depression whose outlet is a permanently flowing ditch.points = 1
Wetland has an unconstricted, or slightly constricted, surface outlet that is
permanently flowing points = 0 Score: 4
D 4.2 What is the depth of storage during the wet periods?
Marks of ponding are 3ft or more above the surface or bottom of the outlet.points = 7
Marks of ponding are between 2ft to <3ft from the surface or bottom of the outlet.points = 5
Marks of ponding are at least 0.5ft to <2ft from the surface or the bottom of the
outlet.points = 3
The wetland is a "headwater" wetland.points = 3
The wetland is flat but has small depressions on the surface that trap water.points = 1
Marks of ponding are less than 0.5ft (6in).points = 0 Score: 0
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…4/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
D 4.3 What is the contribution of the wetland to storage in the watershed?
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5 Score: 5
Total for D 4:9
Rating of Site Potential [ ] 12-16 = H [X] 6-11 = M [ ] 0-5 = L Record the rating on the first page
D 5.0 Does the landscape have the potential to support hydrologic functions of the site?
D 5.1 Does the wetland unit receive stormwater discharges?
Yes points = 1
No points = 0 Score: 1
D 5.2 Is >10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes points = 1
No points = 0 Score: 1
D 5.3 Is more than 25% of the contributing basin of the wetland covered with intensive human land uses?
Yes points = 1
No points = 0 Score: 1
Total for D 5:3
Rating of Landscape Potential [X] 3 = H [ ] 1-2 = M [ ] 0 = L Record the rating on the first page
D 6.0 Are the hydrologic functions provided by the site valuable to society?
D 6.1 Is the wetland in a landscape that has flooding problems?
Flooding occurs in a sub-basin that is immediately down-gradient of the wetland.points = 2
Surface flooding problems are in a sub-basin farther down-gradient.points = 1
Flooding from groundwater is an issue in the basin.points = 1
The existing or potential outflow from the wetland is so constrained that water
cannot reach areas that flood.points = 0
There are no problems with flooding downstream of the wetland.points = 0 Score: 2
D 6.2 Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan?
Yes points = 2
No points = 0 Score: 0
Total for D 6:2
Rating of Value [X] 2-4 = H [ ] 1 = M [ ] 0 = L Record the rating on the first page
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…5/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
HABITAT FUNCTIONS
These questions apply to wetlands of all HGM classes - Indicators that the site functions to
provide important habitat
H 1.0 Does the wetland have the potential to provide habitat for many species?
H 1.1 What is the structure of the plant community?
Aquatic Bed
Emergent
Scrub-shrub
Forested
Multiple strata within the Forested class (canopy, sub-canopy, shrubs,
herbaceous, moss/ground cover)
4 structures or more points = 4
3 structures points = 2
2 structures points = 1
1 structure points = 0
No structures present points = 0 Score: 0
H 1.2 What are the hydroperiods that meet the size thresholds in the wetland?
Permanently flooded or inundated
Seasonally flooded or inundated
Occasionally flooded or inundated
Saturated only
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland
Freshwater Tidal wetland
4 or more types present points = 3
3 types present or Lake Fringe / Freshwater Tidal Fringe points = 2
2 types present points = 1
1 type present points = 0
None present points = 0 Score: 1
H 1.3 What is the richness of the plant species in the wetland?
>19 species points = 2
5-19 species points = 1
<5 species points = 0 Score: 1
✔
✔
✔
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…6/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
H 1.4 What is the interspersion of habitats?
High points = 3
Moderate points = 2
Low points = 1
None points = 0 Score: 0
H 1.5 What are the special habitat features in the wetland?
Large, downed, woody debris within the wetland (>4in diameter and 6ft long).
Standing snags (dbh >4in) within the wetland
Undercut banks are present for at least 6.6ft (2m) and/or overhanging plants
extend at least 3.3ft (1m) over open water or a stream (or ditch) in, or contiguous
with the wetland, for at least 33ft (10m)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (>30 degree slope) OR signs of recent beaver activity are present (cut shrubs
or trees that have not yet weathered where wood is exposed)
At least 0.25ac of thin-stemmed persistent plants or woody branches are present
in areas that are permanently or seasonally inundated (structures for egg-laying by
amphibians)
Invasive plants cover less than 25% of the wetland area in every stratum of plants
(see H 1.1 for list of strata)
6 habitats selected points = 6
5 habitats selected points = 5
4 habitats selected points = 4
3 habitats selected points = 3
2 habitats selected points = 2
1 habitat selected points = 1
No habitats selected points = 0 Score: 0
Total for H 1:2
Rating of Site Potential [ ] 15-18 = H [ ] 7-14 = M [X] 0-6 = L Record the rating on the first page
H 2.0 Does the landscape have the potential to support habitat functions of the site?
H 2.1 What is the percentage of accessible habitat within 1km of the wetland?
>33% of 1km Polygon points = 3
20-33% of 1km Polygon points = 2
10-19% of 1km Polygon points = 1
<10% of 1km Polygon points = 0 Score: 0
H 2.2 What is the percentage of total habitat in a 1km polygon around the wetland?
Total habitat is >50% of the Polygon points = 3
Total habitat is 10-50% of the Polygon and in 1-3 patches points = 2
Total habitat is 10-50% of the Polygon and in >3 patches points = 1
Total habitat is <10% of the Polygon points = 0 Score: 1
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…7/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
H 2.3 What is the land use intensity in the 1km polygon?
50% of the Polygon is high intensity land use points = -2
<50% of the Polygon is high intensity land use points = 0 Score: 0
Total for H 2:1
Rating of Landscape Potential [ ] 4-6 = H [X] 1-3 = M [ ] 0 = L Record the rating on the first page
H 3.0 Is the habitat provided by the site valuable to society?
H 3.1 Does the site provide habitat for species valued in laws, regulations, or policies?
Aspen Stands
Biodiversity Areas and Corridors
Herbaceous Balds
Old-growth/Mature Forests
Oregon White Oak
Riparian
Westside Prairie
Fresh Deepwater
Instream
Nearshore (Coastal, Open Coast, Puget Sound)
Caves
Cliffs
Snags and Logs
Talus
The following criteria automatically score 2 points:
The wetland provides habitat for Threatened or Endangered species
The wetland is mapped as a location for an individual WDFW priority species
The wetland is a Wetland of High Conservation Value
The wetland has been categorized as an important habitat site in a local plan
The wetland has 3 or more WDFW priority habitats within 100m, or meets the
criteria for societal value points = 2
The site has 1 or 2 WDFW priority habitats within 100m points = 1
The site does not meet any of the criteria for societal value points = 0 Score: 0
Total for H 3:0
Rating of Value [ ] 2 = H [ ] 1 = M [X] 0 = L Record the rating on the first page
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…8/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
SC 1.0 Estuarine Wetlands
SC 1.1 Does the wetland meet all of the following criteria for Estuarine wetlands?
The dominant water regime is tidal
The wetland is vegetated
The water salinity is greater than 0.5 ppt
Yes - Go to SC 1.2
No - Not an Estuarine Wetland Result: Not an
Estuarine Wetland
SC 1.2 Is the wetland within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area Preserve,
State Park or Educational, Environmental, or Scientific Reserve designated under WAC 332-30-151?
Yes - Category I Estuarine Wetland
No - Go to SC 1.3 Result:
SC 1.3 Is the wetland unit at least 1ac in size and meets at least two of the following three conditions?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and
has less than 10% cover of non-native plant species.
At least 75% of the landward edge of the wetland has a 100ft buffer of shrub, forest, or un-
grazed or un-mowed grassland
The wetland has at least two of the following features: tidal channels, depressions with open
water, or contiguous freshwater wetlands.
Yes - Category I Estuarine Wetland
No - Category II Estuarine Wetland Result:
SC 2.0 Wetlands of High Conservation Value
SC 2.1 Does the wetland overlap with any known or historical rare plant or rare & high-quality ecosystem polygons on the
WNHP Data Explorer?
Yes - Category I Wetland of High Conservation Value
No - Go to SC 2.2 Result: Go to SC 2.2
SC 2.2 Does the wetland have a rare plant species, rare plant community, or high-quality common plant community that
may qualify the site as a WHCV?
Yes - Category I Wetland of High Conservation Value
No - Not a Wetland of High Conservation Value Result:
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType=…9/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
SC 3.0 Bogs
SC 3.1 Does an area within the wetland unit have organic soil horizons, either peats or mucks, that compose 16in or
more of the first 32in of the soil profile?
Yes - Go to SC 3.3
No - Go to SC 3.2 Result: Go to SC 3.2
SC 3.2 Does an area within the wetland unit have organic soils, either peats or mucks, that are less than 16 in deep over
bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on top of a lake or pond?
Yes - Go to SC 3.3
No - Not a Bog Wetland Result: Not a Bog
Wetland
SC 3.3 Does an area with peats or mucks have more than 70% cover of mosses at ground level, AND at least 30% cover
of plant species listed in the table provided in the instructions?
Yes - Category I Bog Wetland
No - Go to SC 3.4 Result:
SC 3.4 Is an area with peats or mucks forested (>30% cover) with Sitka spruce, subalpine fir, western red cedar, western
hemlock, lodgepole pine, quaking aspen, Engelmann Spruce, or western white pine AND any of the species (or
combinations of species) listed in the table found in the instructions provide more than 30% of the cover under the
canopy?
Yes - Category I Bog Wetland
No - Not a Bog Wetland Result:
SC 4.0 Forested Wetlands
SC 4.1 Does the wetland have at least 1 contiguous acre of forest that meets one of the following criteria?
Old-growth forests
Mature forests
Yes - Category I Forested Wetland
No - Not a Forested Wetland Result: Not a Forested
Wetland
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType…10/12
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Wetland name or number: 41st St - Wetland B
SC 5.0 Wetlands in Coastal Lagoons
SC 5.1 Coastal Lagoons: Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or rocks
The depression in which the wetland is located contains ponded water that is saline or
brackish (>0.5 ppt) during most of the year in at least a portion of the open water area (measured
near the bottom)
The lagoon retains some of its surface water at low tide during spring tides
Yes - Go to SC 5.2
No - Not a Coastal Lagoon Wetland Result: Not a Coastal
Lagoon Wetland
SC 5.2 Does the wetland meet all of the following three conditions?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing), and
has less than 20% cover of aggressive, opportunistic plant species (see list of species).
At least 75% of the landward edge of the wetland has a 100ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
the wetland is larger than 0.10ac (4350 sqft)
Yes - Category I Coastal Lagoon
No - Category II Coastal Lagoon Result:
SC 6.0 Interdunal Wetlands
SC 6.1 Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership WBUO)?
Yes - Go to SC 6.2
No - Not an Interdunal Wetland Result: Not an
Interdunal Wetland
SC 6.2 Is the wetland 1ac or larger in size, or a mosaic that is 1ac or larger in size?
Wetland is larger than 1ac in size - Go to SC 6.3
Wetland is a mosaic larger than 1ac is size - Category II Interdunal Wetland
No - Go to SC 6.4 Result:
SC 6.3 Does the wetland score 8 or 9 points for the habitat functions?
Yes - Category I Interdunal Wetland
No - Category II Interdunal Wetland Result:
SC 6.4 Is the wetland unit between 0.1ac and 1ac, or in a mosaic of wetlands that is between 0.1ac and 1ac in size?
Yes - Category III Interdunal Wetland
No - Category IV Interdunal Wetland Result:
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType…11/12
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Wetland name or number: 41st St - Wetland B
Category of wetland based on Special Characteristics
If you answered No for all types, enter "Not Applicable" on Summary Form Final Category: Not
Applicable
5/27/25, 2:55 PM Wetland Rating Summary
https://secureaccess.wa.gov/ecy/wetlandsratingtool/WATOR/WetlandSummary?WetlandId=3381&WetlandName=41st St - Wetland B&WetlandType…12/12
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Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
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Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
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Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Docusign Envelope ID: E08FC52F-D46E-4DF6-9CCF-85EED7242C4D
Parks and Recreation Division
Department of Natural Resources and Parks
King Street Center
201 South Jackson Street, Suite 700
Seattle, WA 98104-3855
206-477-4527 TTY Relay: 711
Date: 17 June 2025
TO: Ashley Wragge, Assistant Planner, City of Renton, Planning Division
FM: Jon Polka, P.E., King County Parks and Recreation Division (PARKS)
Collin Bond, E.I.T., King County PARKS
RE: Flood Hazard Data for Solar Equity Project
The purpose of the memo is to address flood hazard data (per RMC 4-3-050G.4 and 4-8-120) for
the proposed installation of two off-grid, solar powered area lights.
PROJECT BACKGROUND
The King County Solar Equity Project proposes to install two off-grid solar powered area lights.
One light is to be placed in Boulevard Lane Park and the other is to be placed along the Lake to
Sound Trail. The project will provide sustainable solar panels and energy efficient lighting. This
project will enhance the usability, comfort, and safety in trail areas.
IMPROVEMENT DESCRIPTION
The light pole footing will be precast offsite to avoid a concrete spill and to speed up
construction. The footing will be 2-feet in diameter and 8-feet long, but the footing will be set to
6 to 8 inches above ground surface to protect the pole from mowing and other trail maintenance
activities. Soil spoils will be removed and disposed of outside of the floodplain.
FLOODPLAIN IMPACTS
BOULEVARD LANE PARK
There is one proposed solar lighting improvement for Boulevard Lane Park. The proposed
area lighting (AL3-1) will be installed at approximately 378.0’ (NAVD 88) per the 2025
King County Digital Ground Model. This ground elevation is higher than the base flood
RECEIVED
06/18/2025 AWragge
PLANNING DIVISION
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elevation of 372.2’ per FEMA Cross Section BK near the project location. Therefore, the
light pole is above and outside of the Special Flood Hazard Area based on its elevation. See
Figure 1 for more information.
LAKE TO SOUND TRAIL (GREEN RIVER & BLACK RIVER CONVERGENCE) –
APPROX.
There is one proposed solar lighting improvement for the Lake to Sound Trail near the Black
River. The proposed area lighting (TL1-1) will be installed at approximately 17.2’ per the
2025 King County Digital Ground Model. This is located within a Zone AE floodplain of the
Green-Duwamish River where the base flood elevation is approximately 23’ per the FEMA
FIRMette (see Figure 2).
RMC 4-3-050G.4.e.vi prohibits development in Zone AE special flood hazard areas, unless it
is demonstrated that the water surface elevations of the base flood will not increase more
than one foot at any point within the community. This single light pole is a small, isolated
obstruction and part of a minor project that will not result in a one-foot increase in water
surface elevation consistent with the following FEMA guidance:
“There are other minor projects that probably will not increase flood stages. For example,
small, isolated obstructions such as a mailbox, a pitcher’s mound, or a single telephone
pole can be permitted without requiring no-rise certification.”
- FEMA Guidance for Flood Risk Analysis and Mapping: 11.1.1. Exemption for Minor
Projects
If required, compensatory storage can be provided on site to counteract the volume lost from
the installation of the light pole. Per RMC 4-3-050G.4.g a compensatory storage calculation
was performed to account for the storage volume lost from the addition of the light pole (3.2
ft3). The location and elevation of the proposed improvement is shown in Figure 3.
Compensatory storage calculations are provided in Figure 4.
Jon D. Polka, P.E.
King County Department of
Natural Resources and Parks
Date: June 17, 2025
cc: Tom Early, Capital Project Manager, King County Parks
Polka, Jon
Digitally signed by Polka, JonDN: E=Jon.Polka@kingcounty.gov, CN="Polka, Jon", OU=Users, OU=Parks, DC=dnrp, DC=kingcounty, DC=lclLocation: King County, WAReason: I am approving this documentContact Info: Jon.Polka@kingcounty.govDate: 2025.06.17 07:29:57-07'00'
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SUPPORTING FIGURES
Figure 1. Boulevard Lane Park Improvements
Note: 1’ & 5’ contours from site survey and King County 2023 Digital Ground Model
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Figure 2. FEMA FIRMette (Lake to Sound Trail location)
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Figure 3. Lake To Sound Trail Improvements
Note: 2’ & 10’ contours from site survey and King County 2023 Digital Ground Model
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Figure 4. Lake To Sound Trail Compensatory Storage Calculation
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