HomeMy WebLinkAboutD_Kennydale_Lakeline_Replacement_Shoreline_Permit_25113_v2_FINALDEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
PLANNING DIVISION
SHORELINE MANAGEMENT ACT OF 1971
PERMIT FOR SHORELINE MANAGEMENT
EVALUATION FORM & DECISION
DATE OF PERMIT ISSUANCE: November 13, 2025
LAND USE ACTION FILE NO.: LUA25-000219, ECF, SSDP
DATE RECEIVED July 17, 2025
DATE OF PUBLIC NOTICE: July 17, 2025
Pursuant to Chapter 90.58 RCW, staff recommends that the City of Renton grant a Shoreline Substantial
Development Permit. This action is proposed on the following application:
PROJECT NAME: Kennydale Lakeline Sanitary Sewer Improvement Project
PROJECT MANAGER: Alex Morganroth, Principal Planner
OWNER: See Exhibit 2
APPLICANT/CONTACT: Anousheh Nawaz, City of Renton / 1055 S Grady Way, Renton, WA 98057 / 425-430-
7226 / Anawaz@rentonwa.gov
PROJECT LOCATION: 2725, 2727, 2731, 2801, 2805, 2807, 2811, 2815, 2827, 2905, 2921, 2931, 3001,
3003, 3005, 3007, 3009, 3011, 3013, 3015, 3101, 3103, 3107, 3111, 3115, 3119,
3205, 3209, 3213, 3217, 3233, 3307 Mountain View Ave N; 3401, 3405, 3411, 3501,
3601, 3605, 3607, 3611, 3613, 3619, 3625, 3703, 3707, 3709, 3711, 3713, 3715,
3717, 3719, 3805, 3811, 3815, 3821, 3825, 3827, 3837, 3901, 3905 Lake Washington
Blvd N (APNs: 0523059010, 3342104050, 3342104048, 3342104046, 3342104045,
3342104040, 3342104029, 3342104010, 3342104009, 3342103985, 3342103953,
3342103942, 3342103940, 3342103941, 3342103931, 3342103930, 3342103924,
3342103920, 3342103905, 3342103906, 3342103895, 3342103890, 3342103880,
3342103860, 3342103855, 3342103845, 3342103840, 3342103810, 3342103805,
3342103795, 3342103775, 3124059077, 3124059079, 3124059076, 3124059075,
3124059074, 3124059004, 3342700355, 3342700330, 3342700320, 3342700310,
3342700300, 3342700290, 3342700280, 3224059005, 3342700270, 3342700260,
3342700250, 3342700230, 3342700240, 3342700211, 3342700200, 3342700190,
3342700176, 3342700149, 3342700126, 3342700125, 3342700110, 3342700100,
3342700080, 3342700070, 3342700011)
LEGAL DESCRIPTION: See King County Assessor records for individual address legal descriptions
SEC-TWN-R: SEC 31 TWN 24N R 5E
PROJECT WITHIN THE
SHORELINE OF: Lake Washington, Reach D and Reach E
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 2 of 21
APPLICABLE MASTER
PROGRAM: City of Renton
PROPOSAL DESCRIPTION: The applicant is requesting State Environmental Policy Act (SEPA) review and a
Shoreline Substantial Development Permit (SSDP) for the Kennydale Lakeline Sewer System Replacement Project.
The project site includes multiple parcels (noted above), City of Renton right-of-way, King County Parks property,
and private property located between 3905 Lake Washington Blvd N and the north end of Gene Coulon Memorial
Beach Park. The existing 4,680-foot (4,680’) in-lake sewer system will be replaced with a new land-based low-
pressure sewer system serving 56 properties and a public park. The proposed replacement system includes
approximately 4,950 linear feet (4,950’) of new force main, 55 individual grinder pump stations, and associated
electrical and utility improvements, to be constructed primarily within Mountain View Ave N and an unnamed
access road east of the lake. The project will occur in two (2) phases: (1) upland construction of the new sewer
system and (2) in-water decommissioning of the existing lake-line system. In-water work will be staged from barges
and occur during the approved fish window (approximately July 16 to December 31). Temporary construction-
related disturbance will total approximately 113,670 square feet in upland areas and 875 square feet in aquatic
areas. Work would occur within and adjacent to Reaches D and E of Lake Washington, a Shoreline of the State.
Shoreline designations on the site include Single-Family Residential and Aquatic. Work is anticipated to start in
early 2026 and last up to 18 months. The project includes mitigation and restoration measures to ensure no net
loss of shoreline ecological function. Supporting documents submitted with the application includes a SEPA
Checklist, Vegetation Management Plan, Geotechnical Engineering Report, Arborist Report, and Lake Study.
FINDINGS OF FACT:
1. The applicant is requesting Environmental (SEPA) Review and a Shoreline Substantial Development Permit
(SSDP) for the Kennydale Lakeline Sewer System Replacement Project. The proposal involves replacing the
existing in-lake sewer system with a new land-based low-pressure sewer system serving 56 properties and
Kennydale Beach Park. The existing 4,680-foot (4,680’) in-lake sewer line will be decommissioned and
replaced with approximately 4,950 linear feet (4,950’) of new force main, 55 grinder pump stations, and
associated electrical and utility improvements. Work will occur primarily within City of Renton right-of-way,
King County Parks property, and private parcels between 3905 Lake Washington Blvd N and the north end
of Gene Coulon Memorial Beach Park.
2. Pursuant to RMC 4-9-190B.3, a Shoreline Substantial Development Permit is required for all proposed use
and development of shorelines unless specifically exempt per RCW 90.58.140(1) or WAC 173-27. The
proposed sewer system replacement does not qualify for an exemption because it includes in-water
construction within a Shoreline of the State and new utility installations within 200 feet (200’) of the
Ordinary High Water Mark (OHWM) of Lake Washington.
3. The project includes two (2) phases:
I. Phase 1 (Upland Work): Installation of the new land-based low-pressure sewer system, including
approximately 4,950 linear feet of force main, 55 grinder pump stations, and related electrical
improvements within Mountain View Ave N and an access road owned by King County Parks.
II. Phase 2 (In-Water Work): Decommissioning of the existing 4,680-foot in-lake sewer main and
associated infrastructure, including removal of three (3) manholes, backfilling of approximately 33
cubic yards of lakebed material, and placement of about 39 cubic yards of spawning gravel to
restore fish habitat.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 3 of 21
4. The project site is located along the southeastern shoreline of Lake Washington, within Reaches D and E,
and has Single-Family Residential and Aquatic shoreline environment designations area under the City’s
Shoreline Master Program.
5. The project will add 500 square feet (500 SF) of impervious surface area within the shoreline jurisdiction at
Lift Station No. 2 associated with installation of a generator and minor retaining wall improvements.
6. A total of 308 trees were surveyed within or adjacent to the project corridor (Exhibit 10). Depending on
construction methods, the project will remove between four (4) and twenty-one (21) significant trees and
impact thirteen (13) additional trees within their critical root zones. All removals will be mitigated through
replacement plantings and implementation of the Vegetation Management Plan (Exhibit 9).
7. The site is is mapped with a High Erosion Hazard, a High Seismic Hazard Area, and steep slopes.
8. Supporting documents submitted with the application includes a SEPA Checklist (Exhibit 3), Vegetation
Management Plan (Exhibit 9), Geotechnical Engineering Report (Exhibit 7), Arborist Report (Exhibit 10), and
Lake Study (Exhibit 8).
9. The project did not qualify for SEPA exemption per WAC 197-11-800, and was therefore subject to SEPA
review. The City of Renton acted as lead agency for the State Environmental Policy Act (SEPA) Review for
the project. On September 23, 2025, the Environmental Review Committee issued a Determination of Non-
Significance – Mitigated (DNS-M) for the Kennydale Lakeline Sanitary Sewer Improvemetn project (Exhibit
18). A 14-day comment period commenced on September 23, 2025 and ended on October 7, 2025. No
appeals of the threshold determination have been filed as of the date of this report. The following mitigation
measures were included in the DNS-M:
1) The applicant shall submit an Inadvertent Discovery Plan (IDP) prepared by a qualified professional
prior to the start of any construction. In addition, the applicant shall provide notification to Tribes’
cultural committee prior to the start of construction.
10. Representatives from various city departments have reviewed the application materials to identify and
address issues raised by the proposed development. These comments are contained in the official file,
and the essence of the comments have been incorporated into the appropriate sections of this report.
11. A representative of the Duwamish Tribe submitted a comment letter (Exhibit 11) to city staff on July 23, 2025
indicating the project site is located in an area that the Tribe considers culturally significant with a high
probability of having unknown archeological deposits. In response to the comment, the Environmental
Review Committee included a mitigation measure (Exhibit 19) requiring the applicant to submit an
Inadvertent Discovery Plan (IDP) prior to the start of the construction.
12. A representative of the Washington State Department of Ecology (DOE) submitted a comment (Exhibit 13)
on August 15, 2025 noting that the project area includes a known cleanup site, the Marshall Residence
(Ecology Facility ID 84152951), which is suspected to be contaminated with petroleum, metals, and
polycyclic aromatic hydrocarbons (PAHs). In the comment, DOE requests that the City and applicant notify
Ecology immediately if contamination is encountered during project construction and coordinate directly
with the agency to ensure proper management and cleanup.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 4 of 21
13. A representative of the King County Wastewater Treatment Division letter submitted a comment letter
(Exhibit 15) to city staff on July 30, 2025 indicating the project site is located in an area where wastewater
infrastructure is located and requesting the applicant notify the division prior to construction.
14. A Lake Study, prepared by Confluence Environmental Company (May 2025) (Exhibit 8), was submitted with
the application to evaluate shoreline ecological functions in accordance with RMC 4-3-090(D). The study
concluded that the project will result in no net loss of shoreline ecological function, as the upland sewer
alignment minimizes in-water disturbance, the decommissioning of the existing lake-line system removes
an ongoing contamination risk, and habitat will be enhanced through spawning gravel placement and
native vegetation restoration.
15. The following table contains project elements intended to comply with the Shoreline Master Program
standards and policies, as outlined in RMC 4-3-090:
SHORELINE MASTER PROGRAM CRITERIA:
A. COMPREHENSIVE PLAN COMPLIANCE AND CONSISTENCY, SHORELINE AND UTILITY ELEMENT:
The site is located in the Shoreline Single-Family Residential and Aquatic Overlay District. The objective
of the Single-Family Residential Shoreline Overlay District is to accommodate residential development
and appurtenant structures that areconsistent with this chapter.. The proposal is compliant with the
following Shoreline policies:
✓ Objective SH-A. Provide for use of the limited water resource consistent with the goals of
the Shoreline Management Act by providing a preference for water-oriented uses.
✓
Objective SH-B. Provide that the policies, regulations, and administration of the Shoreline
Master Program ensure that new uses, development, and redevelopment within the
shoreline jurisdiction do not cause a net loss of shoreline ecological functions.
✓ Policy SH-7. Existing and future activities on all Shorelines of the State regulated by the City
of Renton should be designed to ensure no net loss of ecological functions.
✓
Policy SH-14. Shoreline use and development should be carried out in a manner that
prevents or mitigates adverse impacts so that the resulting ecological condition does not
become worse than the current condition. This means ensuring no net loss of ecological
functions and processes in all development and use. Permitted uses should be designed
and conducted to minimize, in so far as practical, any resultant damage to the ecology and
environment (RCW 90.58.020). Shoreline ecological functions that should be protected
include, but are not limited to, fish and wildlife habitat, food chain support, and water
temperature maintenance. Shoreline processes that shall be protected include, but are not
limited to, water flow; littoral drift; erosion and accretion; infiltration; ground water
recharge and discharge; sediment delivery, transport, and storage; large woody debris
recruitment; organic matter input; nutrient and pathogen removal; and stream channel
formation/maintenance.
✓ Goal UT-A. Provide an adequate level of public utilityservice that is sustainable, reliable,
and consistent with land use, environmental, and annexation goals and policies.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 5 of 21
✓
Policy UT-2. Protect the health and safety of Renton residents from environmental hazards
associated with utility systems through the proper design, construction, maintenance,
operation, and siting of utility facilities.
✓
Goal UT-F. Ensure the availability of an adequate level of sanitary sewer service through
system planning that is consistent with land use, environmental protection, and annexation
goals and policies
✓
Goal UT-G. Provide and maintain a sanitary sewer collection system that is consistent with
the public health and water quality objectives of the State of Washington and the City of
Renton.
B. DEVELOPMENT STANDARDS:
The subject site is classified as Single-Family Residential and Aquatic on the City of Renton Shoreline
Overlay Map. The following development standards are applicable to the proposal:
1. No Net Loss of Ecological Functions Required
✓
Shoreline use and development shall be carried out in a manner that prevents or mitigates
adverse impacts to ensure no net loss of ecological functions and processes in all
development and use. Permitted uses are designed and conducted to minimize, in so far
as practical, any resultant damage to the ecology and environment (RCW 90.58.020).
Shoreline ecological functions that shall be protected include, but are not limited to, fish
and wildlife habitat, food chain support, and water temperature maintenance. Shoreline
processes that shall be protected include, but are not limited to, water flow; erosion and
accretion; infiltration; groundwater recharge and discharge; sediment delivery, transport,
and storage; large woody debris recruitment; organic matter input; nutrient and pathogen
removal; and stream channel formation/maintenance.
Staff comment: The proposed Kennydale Lakeline Sewer System Replacement Project
would remove an aging in-lake sewer line that currently extends approximately 4,680 feet
(4,680’) offshore in Lake Washington and replace it with a land-based low-pressure sewer
system located upland of the shoreline. The existing lake-line infrastructure will be
decommissioned following completion of the new system and filled with lake water to
prevent collapse, while three (3) manholes will be removed and backfilled with
approximately 39 cubic yards (CY) of spawning gravel to improve fish habitat.
The applicant submitted a Lake Study, prepared by Confluence Environmental Company
and dated May 2025 (Exhibit 8), which evaluated the project’s effects on shoreline
ecological functions. The study concludes that the project would result in no net loss of
ecological function and, in several respects, provide long-term environmental benefits by
eliminating the potential for lakebed scour, sediment resuspension, or wastewater leakage
from the existing in-lake system.
The upland work would occur within Mountain View Ave N and adjacent access roads,
primarily within disturbed right-of-way and residential yards that are already modified by
development and landscaping. Approximately 113,670 square feet (113,670 SF) of
temporary upland disturbance is anticipated, limited primarily to excavation for the new
force main and grinder pump installations. The applicant’s Vegetation Management Plan
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 6 of 21
(Exhibit 9) identifies replacement planting, invasive species removal, and three-year
monitoring to ensure restoration success.
The in-water work is limited to manhole removal and habitat restoration, totaling
approximately 875 square feet (875 SF) of disturbance below the OHWM. In-water work will
occur only within the Washington Department of Fish and Wildlife’s approved fish window
(July 16 – December 31), and best management practices (BMPs) will be implemented to
control turbidity and sediment release.
The Lake Study identifies that the project area supports multiple ESA-listed fish species,
including Chinook salmon (Oncorhynchus tshawytscha), steelhead trout (O. mykiss), and
bull trout (Salvelinus confluentus), as well as resident salmonids such as sockeye and
coho. The spawning gravel to be placed at manhole removal locations is specifically
designed to improve substrate conditions for sockeye salmon spawning and juvenile
rearing.
Because the project will replace subaqueous infrastructure with an upland system, remove
obsolete lakebed structures, and implement comprehensive restoration and monitoring
measures, it will reduce long-term risk to aquatic habitat and improve shoreline function.
Therefore, staff concludes that the proposal is consistent with RCW 90.58.020, RMC 4-3-
090(D)(2), and the no net loss standard of the Shoreline Master Program.
2. Burden on Applicant
✓
Applicants for permits have the burden of proving that the proposed development is
consistent with the criteria set forth in the Shoreline Master Program and the Shoreline
Management Act, including demonstrating all reasonable efforts have been taken to
provide sufficient mitigation such that the activity does not result in net loss of ecological
functions.
Staff Comment: The applicant has submitted detailed environmental documentation
demonstrating that the Kennydale Lakeline Sewer System Replacement Project is
consistent with the City of Renton Shoreline Master Program (SMP) and the Shoreline
Management Act (RCW 90.58). Supporting materials include a Lake Study (Exhibit 8),
Vegetation Management Plan (Confluence Environmental and Tree Solutions, May 2025)
(Exhibit 9), Geotechnical Engineering Report (Shannon & Wilson, December 2024) (Exhibit
7), and Arborist Report (Tree Solutions, April 2025) (Exhibit 10). Collectively, these reports
provide an in-depth assessment of shoreline conditions, habitat functions, vegetation,
slope stability, and proposed mitigation.
The submitted Lake Study demonstrates that all reasonable efforts have been taken to
avoid, minimize, and mitigate impacts to shoreline ecological functions. The project design
reflects a deliberate shift of infrastructure away from the aquatic environment—replacing
the existing 4,680-foot in-lake sewer line with a land-based low-pressure system located
primarily within existing right-of-way and previously disturbed residential areas. This
relocation eliminates the need for long-term maintenance activities within Lake
Washington, thereby reducing future risk of sediment disturbance or pollutant discharge.
In-water work is limited to the removal of three (3) manholes and minor gravel placement
to restore spawning substrate. These activities will be conducted from barges during the
approved fish window (July 16 to December 31) and will incorporate best management
practices (BMPs) to minimize turbidity and sedimentation. Upland disturbance will be
temporary and restored through the project’s Vegetation Management Plan, which
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 7 of 21
includes tree replacement, invasive species removal, and multi-year monitoring to ensure
successful re-establishment of native vegetation.
The project represents the culmination of several years of analysis and coordination among
City staff, Confluence Environmental Company, and Carollo Engineers to identify the least
environmentally impactful alternative. The applicant’s documentation adequately
demonstrates that the proposed development has been designed to avoid and minimize
environmental effects to the maximum extent practicable and that proposed restoration
and mitigation measures will offset any temporary construction impacts.
Therefore, staff finds that the applicant has satisfied the burden of proof under RMC 4-3-
090(D) and RCW 90.58.020, and has demonstrated that all reasonable efforts have been
taken to avoid, minimize, and mitigate impacts such that the project will not result in a net
loss of shoreline ecological functions.
3. Critical Areas Within Shoreline Jurisdiction
✓
Unless otherwise stated, no development shall be constructed, located, extended,
modified, converted, or altered, or land divided without full compliance with the provision
adopted by reference and the Shoreline Master Program.
Staff Comment: The Kennydale Lakeline Sewer System Replacement Project is located
along the eastern shoreline of Lake Washington, within the Shoreline of the State as defined
by RMC 4-3-090(B)(1)(a). According to City of Renton critical area maps, portions of the
project corridor are identified as High Seismic Hazard Areas, High Erosion Hazard Areas,
and Sensitive or Protected Slopes. The shoreline itself is extensively armored with
bulkheads, riprap, and retaining walls, and therefore exhibits limited natural shoreline
processes.
To address geologic and soil conditions, the applicant submitted a Geotechnical
Engineering Report, prepared by Shannon & Wilson and dated December 6, 2024 (Exhibit
7). The report provides detailed subsurface characterization and slope stability analysis for
multiple segments of the project alignment, including the proposed generator foundation
near Lift Station No. 2. The study found that slopes within the project area are stable under
static undrained conditions and marginally stable under seismic conditions, with a factor
of safety below 1.0 under long-term drained conditions. The report recommends
implementation of retaining structures or reinforced foundations, careful excavation
practices, and adherence to erosion and sediment control best management practices
(BMPs) to maintain long-term slope stability.
No wetlands, streams, or floodplains occur within the project area. The nearest surface
water is Lake Washington, which forms the western boundary of the project corridor. In-
water work will be limited to manhole removal and gravel placement within approximately
875 square feet (SF) of lakebed. These activities will occur during the approved fish window
(July 16 – December 31) under close compliance with applicable state and federal permits.
The upland work involves trenching within Mountain View Ave N and adjacent right-of-way
to install approximately 4,950 linear feet (LF) of new force main and 55 grinder pump
stations. Temporary ground disturbance will occur primarily within previously developed or
landscaped areas and will be restored in accordance with the Vegetation Management Plan
(Confluence Environmental and Tree Solutions, May 2025) (Exhibit 9).
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 8 of 21
Based on the submitted reports, the proposed design incorporates appropriate engineering
and environmental safeguards to prevent adverse impacts to geologically hazardous areas,
maintain slope stability, and protect shoreline ecological functions. Therefore, staff
concludes that the proposal complies with the City’s Shoreline Master Program and the
Critical Areas Regulations referenced in RMC 4-3-090(D)
4. Development Standards for Aquatic Habitat
✓
i. Stormwater Requirements: Development shall provide stormwater management
facilities including water quality treatment designed, constructed, and maintained in
accordance with the current stormwater management standards. Water quality treatment
facilities shall be provided for moderate alteration of nonconforming structures, uses and
sites as provided for in RMC 4-10-095.
ii. Erosion and Sediment Control Requirements: Best management practices for control of
erosion and sedimentation shall be implemented for all development in shorelines through
approved temporary erosion and sediment control plan, or administrative conditions.
iii. Lighting Requirements: Nighttime lighting shall be designed to avoid or minimize
interference with aquatic life cycles through avoidance of light sources that shine directly
onto the water. Exterior lighting fixtures shall include full cut off devices such that glare or
direct illumination does not extend into water bodies. Lighting shall include timers or other
switches to ensure that lights are extinguished when not in use.
Staff Comment: The Kennydale Lakeline Sewer System Replacement Project involves both
upland and in-water work within the shoreline jurisdiction of Lake Washington. The
applicant submitted a Lake Study (Exhibit 9) and Geotechnical Engineering Report (Exhibit
7), as well as other supporting design plans that describe stormwater, erosion control, and
construction management measures.
Stormwater Management: Stormwater from upland construction areas will be managed
consistent with the 2022 City of Renton Surface Water Design Manual (adopted from the
2022 King County Surface Water Design Manual). The project is subject to a Full Drainage
Review and will implement Core Requirements #1–9 and all applicable Special
Requirements. Upland construction will be limited to previously disturbed right-of-way and
landscaped areas, minimizing the creation of new impervious surfaces. The project
includes standard stormwater BMPs such as silt fencing, sediment traps, inlet protection,
check dams, and temporary storm drain filters. Following completion of construction,
disturbed areas will be regraded and stabilized, and permanent stormwater conveyance
will connect to existing City infrastructure. The new force main and grinder pump laterals
will not generate measurable new runoff or water quality impacts because they are located
underground and restored to pre-project conditions.
Erosion and Sediment Control: Temporary erosion and sediment control (TESC) measures
will be implemented throughout the duration of construction in accordance with RMC 4-6-
030 and RMC 4-4-130(C). These measures include maintaining vegetative buffers where
feasible, using plastic sheeting and hydroseeding for exposed soils, installing temporary
gravel construction entrances, and providing on-site stormwater treatment for dewatering
activities. The Geotechnical Engineering Report (Shannon & Wilson, 2024) (Exhibit 7)
identifies perched groundwater in several segments of the alignment; as a result, localized
dewatering may be required. Dewatering effluent will be filtered and discharged in
compliance with Renton and Ecology standards. In-water work will occur from barges
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 9 of 21
during the approved fish window (July 16–December 31), and turbidity curtains will be
deployed around manhole removal sites to contain sediment and protect aquatic habitat.
Lighting Requirements: No new permanent exterior lighting is proposed in or near the
aquatic environment. Temporary lighting may be required for safety during nighttime
construction; however, all lighting will be shielded and directed away from Lake
Washington, consistent with SMP standards. If permanent fixtures are installed for the
generator site or control panels, they will include full cut-off shielding and timers or motion-
activated switches to prevent unnecessary nighttime illumination that could interfere with
aquatic life cycles.
With implementation of these design and operational measures, the project will comply
with the City’s stormwater, erosion, and lighting requirements and will not adversely affect
aquatic habitat or water quality.
5. View Obstruction and Visual Quality
✓
View Corridors Required: Where commercial, industrial, multiple use, multi-family and/or
multi-lot developments are proposed, primary structures shall provide for view corridors
between buildings where views of the shoreline are available from public right-of-way or
trails.
Staff Comment: The Kennydale Lakeline Sewer System Replacement Project is located
along the eastern shoreline of Lake Washington, extending from 3905 Lake Washington
Blvd N to the north end of Gene Coulon Memorial Beach Park. The project corridor runs
primarily through residential and park-adjacent areas, with the majority of improvements
located within existing public right-of-way.
The project involves the installation of underground sewer infrastructure, grinder pump
stations, and one small generator enclosure near Lift Station No. 2. With the exception of
the generator enclosure (approximately 6 to 8 feet in height), no new above-ground
permanent structures are proposed within the shoreline jurisdiction. Temporary
construction equipment and staging areas will be removed following completion of work,
and disturbed areas will be restored per the Vegetation Management Plan (Confluence
Environmental Company, May 2025) (Exhibit 9).
Because the project consists almost entirely of subsurface utility work, it will not obstruct
public views of Lake Washington or alter existing visual access from nearby vantage points.
The shoreline in this area is already partially screened by residential structures, vegetation,
and shoreline armoring, and the proposed improvements will not add visual bulk or height
above the existing landscape.
During in-water work, construction barges and equipment may be visible from portions of
Kennydale Beach Park and Lake Washington Boulevard N, but these effects will be
temporary and limited to short-term activities within the approved fish window (July 16–
December 31). Upon completion, no permanent above-water or visually intrusive features
will remain.
Staff finds that the proposal will not result in permanent obstruction of shoreline views or
degradation of visual quality and is consistent with RMC 4-3-090(E) and applicable
Shoreline Master Program requirements.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 10 of 21
✓
Maximum Building Height: Buildings shall be limited to a height of no more than 35 feet
above average finished grade level except at specific locations.
Staff Comment: The only proposed structure within the shoreline jurisdiction is a small
generator enclosure located near Lift Station No. 2, which will not exceed eight feet (8’) in
height. All other elements of the project—including force mains, laterals, and grinder pump
stations—are located underground or flush with existing grade. The project is therefore well
below the maximum shoreline height limit and consistent with RMC 4-3-090(E).
N/A
Minimum Setbacks for Commercial Development Adjacent to Residential or Park Uses: All
new or expanded commercial development adjacent to residential use and public parks
shall provide fifteen feet setbacks from adjacent properties to attenuate proximity impacts
such as noise, light and glare, and may address scale and aesthetic impacts. Fencing or
landscape areas may be required to provide a visual screen.
Staff Comment: Not applicable, no commercial development is proposed.
✓
Lighting Requirements: Display and other exterior lighting shall be designed and operated
so as to prevent glare, to avoid illuminating nearby properties used for noncommercial
purposes, and to prevent hazards for public traffic. Methods of controlling spillover light
include, but are not limited to, limits on the height of light structure, limits on light levels of
fixtures, light shields, and screening.
Staff Comment: Minimal exterior lighting is proposed as part of the project. The only
permanent lighting would be associated with the generator site near Lift Station No. 2,
which will include fully shielded, downward-directed fixtures designed to prevent light
spillover onto adjacent properties or Lake Washington. Construction lighting, if used, will
be temporary, motion-activated, and directed away from the water.
These measures are consistent with Shoreline Master Program lighting standards and
ensure that the project will not generate glare, light trespass, or adverse visual effects on
aquatic habitat.
N/A
Reflected Lights to Be Limited: Building surfaces on or adjacent to the water shall employ
materials that limit reflected light.
Staff Comment: Not applicable, no buildings are proposed as part of the project.
✓
Integration and Screening of Mechanical Equipment: Building mechanical equipment shall
be incorporated into building architectural features, such as pitched roofs, to the maximum
extent feasible. Where mechanical equipment cannot be incorporated into architectural
features, a visual screen shall be provided consistent with building exterior materials that
obstructs views of such equipment.
Staff Comment: No visible mechanical equipment is proposed. All pump and control
systems will be housed within underground vaults or small access cabinets screened from
view by landscaping or terrain. The generator enclosure will be painted in muted, non-
reflective colors to minimize visibility and visual contrast with the surrounding environment.
✓
Visual Prominence of Freestanding Structures to Be Minimized: Facilities not incorporated
into buildings including fences, piers, poles, wires, lights, and other freestanding structures
shall be designed to minimize visual prominence.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 11 of 21
Staff Comment: The project will not include any new fencing, poles, or freestanding lighting
within the shoreline jurisdiction. The generator enclosure is modest in size and will be
visually subordinate to existing vegetation and terrain. Because the project’s components
are primarily underground and dispersed along the right-of-way, the visual prominence of
new facilities is minimal.
N/A
Maximum Stair and Walkway Width: Stairs and walkways located within shoreline
vegetated buffers shall not exceed four feet in width; provided, that where ADA
requirements apply, such facilities may be increased to six feet in width. Stairways shall
conform to the existing topography to the extent feasible.
Staff Comment: Not applicable, no stairs or paved walkways are proposed as part of the
project.
N/A
Other Design Standards: Any other design standards included in community plans or
regulations adopted by the City shall be incorporated.
Staff Comment: Not applicable, no specific design standards apply to public utility
infrastructure.
6. Community Disturbances:
✓
Noise, odors, night lighting, water and land traffic, and other structures and activities shall
be considered in the design plans and their impacts avoided or mitigated.
Staff Comment: The Kennydale Lakeline Sewer System Replacement Project will
temporarily generate noise and activity typical of utility construction, but no long-term
community disturbances are anticipated. Work will occur in two phases, upland sewer
installation and in-water decommissioning, and will primarily take place within public right-
of-way and previously disturbed shoreline areas.
Noise: Construction noise will result from excavation, equipment operation, and barge
activity but will be short-term and limited to allowed construction hours under RMC 8-7. No
long-term operational noise sources are proposed. The only above-ground mechanical
feature, a standby generator enclosure near Lift Station No. 2, will be designed to meet state
noise level standards (WAC 173-60) and is expected to operate infrequently for testing or
emergency use only.
Odors: The project replaces an existing sewer conveyance system but will not include
treatment processes or facilities that produce odor. Grinder pump stations are sealed and
vented through standard sanitary design, and no new odor emissions are anticipated.
Lighting: Minimal exterior lighting is proposed. Any fixtures associated with the generator
enclosure will be fully shielded and downward directed, ensuring no spillover toward the
shoreline or adjacent residences. Construction lighting, if required for nighttime safety, will
be temporary and directed away from Lake Washington.
Water and Land Traffic: Construction barges will access the site from Lake Washington only
during in-water work, and their presence will be temporary. Upland work will require limited
truck and equipment access within Mountain View Ave N, managed through approved
traffic control plans. No permanent change to public access, shoreline navigation, or
vehicular traffic patterns will occur.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 12 of 21
Following construction, the project will operate as a subsurface utility system requiring
minimal maintenance and will not introduce any new permanent sources of noise, light,
odor, or traffic.
Staff finds that the proposal has been designed to avoid and minimize community
disturbance consistent with RMC 4-3-090(E) and the Shoreline Master Program.
7. Design Requirements:
✓
Architectural styles, exterior designs, landscaping patterns, and other aspects of the
overall design of a site shall be in conformance with urban design and other standards
contained in RMC 4-3-100, Urban Design Regulations, and other applicable provisions of
RMC Title IV, Development Regulations, as well as specific policies and standards of the
Shoreline Master Program.
Staff Comment: The Kennydale Lakeline Sewer System Replacement Project consists
primarily of underground utility work within existing public right-of-way (ROW) and shoreline
areas, with minimal above-ground components. The only permanent visible feature within
the shoreline jurisdiction is a small generator enclosure near Lift Station No. 2, designed to
house electrical equipment necessary for system operation. The enclosure will be modest
in height (less than 8 feet), constructed of non-reflective, neutral-colored materials, and
located outside of public view corridors.
No architectural buildings, pedestrian facilities, or landscape features typical of urban
design review are proposed. The project does not introduce new development patterns or
visible site alterations beyond the replacement of existing infrastructure. Landscaping and
disturbed areas will be restored according to the Vegetation Management Plan (Confluence
Environmental Company and Tree Solutions, May 2025) (Exhibit 9), which specifies native
species and performance monitoring to ensure successful re-establishment of vegetation.
Given the project’s functional utility purpose, limited visibility, and restoration
commitments, the design is consistent with the intent of RMC 4-3-100 (Urban Design
Regulations), RMC Title IV, and the Shoreline Master Program. The project maintains
compatibility with surrounding residential and park environments and will not alter the
visual or architectural character of the shoreline area.
8. Screening Required:
✓
The standards in RMC 4-4-095 concerning screening of mechanical equipment and
outdoor service and storage areas shall apply within shorelines with the additional criteria
that the provisions for bringing structures or sites into conformance shall occur for minor
alteration or renovation as provided in RMC 4-9-190.
Staff Comment: The project design inherently meets screening and compatibility standards
through the placement of equipment underground and the use of non-reflective materials
for limited above-ground elements.
9. Public Access:
Physical or visual access to shorelines shall be incorporated in all new development when the
development would either generate a demand for one or more forms of such access, would impair
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 13 of 21
existing legal access opportunities or rights, or is required to meet the specific policies and regulations
of the Shoreline Master Program.
✓
Lake Washington Reach D and E: Public access shall be provided when lots are subdivided
or new nonresidential development occurs consistent with standards of this Section.
Staff Comment: The project involves the replacement of existing public utility infrastructure
and does not include subdivision, new buildings, or site development that would generate
public access requirements under the Shoreline Master Program. The proposed sewer
main, grinder pump stations, and related facilities will be located below grade within
existing public right-of-way, King County Parks property, and private easements, and will
not alter existing shoreline access or views.
All temporary construction areas within Kennydale Beach Park and adjacent shoreline
properties will be restored following completion of work in accordance with the Vegetation
Management Plan (Confluence Environmental Company and Tree Solutions, May 2025)
(Exhibit 9). The project does not restrict or diminish existing public use of shoreline parks,
trails, or viewpoints, nor does it create new barriers to public access along Lake
Washington.
10. Building and Development Location – Shoreline Orientation
Shoreline developments shall locate the water-dependent, water-related, and water-enjoyment portions
of their developments along the shoreline. Development and use shall be designed in a manner that
directs land alteration to the least sensitive portions of the site to maximize vegetation conservation;
minimize impervious surfaces and runoff; protect riparian, nearshore and wetland habitats; protect
wildlife and habitats; protect archaeological, historic and cultural resources; and preserve aesthetic
values.
✓
Minimization of Site Alteration: Development shall minimize site alteration in sites with
substantial unaltered natural features by applying the following criteria:
(a) Vehicle and pedestrian circulation systems shall be designed to limit clearing, grading,
and alteration of topography and natural features.
(b) Impervious surfacing for parking lot/space areas shall be limited through the use of
under-building parking or permeable surfaces where feasible.
(c) Utilities shall share roadway and driveway corridors and rights-of-way wherever
feasible.
(d) Development shall be located and designed to avoid the need for structural shoreline
stabilization over the life of the development. Exceptions may be made for the limited
instances where stabilization is necessary to protect allowed uses, particularly water-
dependent uses, where no alternative locations are available and no net loss of ecological
functions will result.
Staff comment: The proposed project has been designed to minimize site alteration and
disturbance within the shoreline jurisdiction while improving shoreline ecological function.
The project replaces an existing 4,680-foot in-lake sewer main with a new 4,950-foot land-
based system located entirely within previously developed upland areas, including public
right-of-way and King County Parks access roads.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 14 of 21
All work will occur within disturbed corridors, with utilities sharing existing roadway
alignments to avoid clearing or grading of natural areas. The only permanent above-ground
element, a small generator enclosure at Lift Station No. 2, will be modest in height,
screened by existing vegetation, and located outside of the riparian zone. No new
impervious surface will be created, and all disturbed areas will be restored using native
vegetation consistent with the Vegetation Management Plan (Exhibit 9).
The project will not require shoreline stabilization and avoids alteration of natural shoreline
features, consistent with RMC 4-3-090(E) and the Shoreline Master Program standards for
shoreline orientation and site design.
N/A
Location for Accessory Development: Accessory development or use that does not require
a shoreline location shall be located outside of shoreline jurisdiction unless such
development is required to serve approved water-oriented uses and/or developments or
unless otherwise allowed in a High Intensity designation. When sited within shoreline
jurisdiction, uses and/or developments such as parking, service buildings or areas, access
roads, utilities, signs and storage of materials shall be located inland away from the
land/water interface and landward of water-oriented developments and/or other approved
uses unless a location closer to the water is reasonably necessary.
✓
Navigation and Recreation to Be Preserved: Shoreline uses shall not deprive other uses of
reasonable access to navigable waters. Existing water-related recreation shall be
preserved.
Staff comment: The proposed project will not impede navigation or interfere with
recreational use of the lake. All in-water activity will be limited to temporary barge-based
construction during removal of the existing lake-line manholes, conducted within a
confined work area and outside of established recreational zones.
No public access points or recreational facilities are located within the immediate project
corridor, and access to nearby amenities such as Kennydale Beach Park and Gene Coulon
Memorial Beach Park will remain unaffected. Following construction, the site will return to
its pre-project condition with no new in-water structures or obstructions.
11. Archaeological, Historical, and Cultural Resources:
Compliant
if SEPA
Mitigation
Measure
complied
with
Detailed Cultural Assessments May Be Required: The City will work with tribal, State,
Federal, and other local governments as appropriate to identify significant local historical,
cultural, and archaeological sites in observance of applicable State and Federal laws
protecting such information from general public disclosure. Detailed cultural assessments
may be required in areas with undocumented resources based on the probability of the
presence of cultural resources.
Staff comment: Historically, various tribes lived near or adjacent to Lake Washington. As
such, the project proposal and notice of application were provided to reviewing agencies
including the State Department of Archaeology & Historic Preservation (DAHP) as part of
the notice of application.
A representative of the Duwamish Tribe submitted a comment letter (Exhibit 11) to city staff
on July 23, 2025 indicating the project site is located in an area that the Tribe considers
culturally significant with a high probability of having unknown archaeological deposits. In
addition, the Washington Department of Archaeology and Historic Preservation WISAARD
mapping tool indicates a high to very high potential for encountering cultural resources. The
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 15 of 21
Tribe also requests the applicant plant only native vegetation and trees for replacement in
the project area. Staff notes that the Vegetation Management Plan includes a proposal for
the establishment of native vegetation where possible. In response to the comment, the
Environmental Review Committee included a mitigation measure (Exhibit 19) requiring the
applicant to submit an Inadvertent Discovery Plan (IDP) prior to the start of the
construction.
Compliant
if SEPA
Mitigation
Measure
complied
with
Coordination Encouraged: Owners of property containing identified or probable historical,
cultural, or archaeological sites are encouraged to coordinate well in advance of
application for development to assure that appropriate agencies such as the Washington
State Department of Archaeology and Historic Preservation, affected tribes, and historic
preservation groups have ample time to assess the site and identify the potential for
cultural resources.
Staff comment: See comment above.
Compliant
if SEPA
Mitigation
Measure
complied
with
Detailed Cultural Assessments Required: Upon receipt of application for a development in
an area of known or probable cultural resources, the City shall require a site assessment
by a qualified professional archaeologist or historic preservation professional and ensure
review by qualified parties including the Washington State Department of Archaeology and
Historic Preservation, affected tribes, and historic preservation groups.
Staff comment: See comment above.
Compliant
if SEPA
Mitigation
Measure
complied
with
Work to Stop Upon Discovery: If historical, cultural, or archaeological sites or artifacts are
discovered in the process of development, work on that portion of the site shall be stopped
immediately, the site secured, and the find reported as soon as possible to the
Administrator of the Department of Community and Economic Development or designee.
Upon notification of such find, the property owner shall notify the Washington State
Department of Archaeology and Historic Preservation and affected tribes. The
Administrator of the Department of Community and Economic Development or designee
shall provide for a site investigation by a qualified professional and may provide for
avoidance, or conservation of the resources, in coordination with appropriate agencies.
Staff comment: See comment above.
Compliant
if SEPA
Mitigation
Measure
complied
with
Access for Educational Purposes Encouraged: Land owners are encouraged to provide
access to qualified professionals and the general public if appropriate for the purpose of
public education related to a cultural resource identified on a property.
Staff comment: See comment above.
12. Standards for Density, Setbacks, and Height
✓
Setbacks and buffers from the OHWM:
Single-Family Overlay District – For non-water oriented uses a 100 foot setback (i.e. the
vegetated buffer) is required from the OHWM.
Aquatic Overlay District - None
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 16 of 21
Underground utilities and Essential Public Facilities are exempt from the buffers and
setback requirements per RMC 4-3-090.D7.(d)(ii).
Staff Comment: The project primarily involves underground utility installation, which is
exempt from shoreline setback and buffer requirements. The only above-ground feature, a
small standby generator enclosure, will be located more than 100 feet from the Ordinary
High Water Mark (OHWM) and outside of the vegetated buffer.
No structures are proposed within the shoreline setback, and the project complies with the
applicable shoreline density, setback, and height standards under RMC 4-3-090(D).
✓
Single-Family Overlay District - Vegetation Conservation Buffer: 100 feet.
Aquatic Overlay District - None
Staff Comment: The project involves replacement of existing in-lake sewer infrastructure
with a new land-based system, with all work occurring within existing developed upland
corridors. No new structures are proposed within the 100-foot Vegetation Conservation
Buffer, and the only permanent above-ground component, a generator enclosure, will be
located outside of the buffer and screened by existing vegetation.
The project will not increase impervious surface area or significnatly alter existing shoreline
conditions with the vegetation conservation buffer area. All distrubued areas would be
restored per the Vegetation Management Plan (Exhibit 9). The proposal therefore complies
with the Vegetation Conservation Buffer standards under RMC 4-3-090(D) and maintains
consistency with the no net loss requirement of the Shoreline Master Program.
✓
Single-Family Overlay District and Aquatic Overlay District -
Building Height – Maximum:
In water – 35 ft.
Within 100 feet of OHWM – 35 ft.
More than 100 feet from the OHWM – 35 ft.
For buildings landward of one hundred feet (100') from OHWM, the maximum building
height shall be defined by a maximum allowable building height envelope that shall:
i. Begin along a line laying parallel to and one hundred feet (100') from OHWM at a height of
either thirty five feet (35') or one half (1/2) the maximum height allowed in the underlying
zone, whichever is greater; and
ii. Have an upward, landward transition at a slope of one vertical to one horizontal from the
beginning height either (a) until the line at which the maximum height allowed in the
underlying zoning in chapter 4-2 RMC is reached (from which line the height envelope shall
extend landward at the maximum height allowed in the underlying zoning), or (b) to the end
of shoreline jurisdiction, whichever comes first.
Staff Comment: The generator enclosure height would not exceed eight feet (8’) and
therefore comply with the maximum building height standard in the shoreline.
✓
Single-Family Overlay District - Impervious area within the Buffer/Setback: 5%
Aquatic Overlay District - None
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 17 of 21
Staff Comment: The project primarily involves installation of underground utilities within
existing roadway and right-of-way areas and will not add new impervious surface within the
100-foot Vegetation Conservation Buffer. The only above-ground feature, a small generator
enclosure, will be located outside of the buffer and on previously disturbed ground.
Because the project does not increase impervious area or expand existing site coverage
within the shoreline buffer, it complies with the five percent (5%) impervious area limit and
remains consistent with the Shoreline Master Program standards for non-water-oriented
development.
13. Use Regulations (Utilities):
a. Criteria for All Utilities:
✓
Local utility services needed to serve water-dependent and other permitted uses in
the shoreline are subject to standards for ecological protection and visual
compatibility.
Staff Comment: The proposed utility replacement is designed to improve ecological
protection by removing aging in-lake infrastructure and relocating the system to upland
areas. The project will be largely underground and visually compatible with the surrounding
residential and park environment.
✓
New public or private utilities shall be located inland from the land/water interface,
preferably out of shoreline jurisdiction, unless:
(a) Perpendicular water crossings are unavoidable; or
(b) Utilities are necessary for authorized shoreline uses consistent with the Shoreline
Master Program.
Staff Comment: The new low-pressure sewer system will be located landward of the
shoreline, within existing public right-of-way and upland corridors. Only temporary in-water
work is proposed to remove the existing submerged system, consistent with shoreline
standards.
✓
Linear facilities consisting of pipelines, cables and other facilities on land running
roughly parallel to the shoreline shall be located as far from the water’s edge as
feasible and preferably outside of shoreline jurisdiction.
Staff Comment: The new force main will run parallel to the shoreline within Mountain View
Ave N, maximizing separation from the water’s edge and minimizing shoreline disturbance.
✓
Utilities shall be located in existing rights-of-way and corridors, whenever reasonably
feasible.
Staff Comment: The majority of the new sewer facilities will be constructed within existing
roadways, public utility corridors, and easements, consistent with this standard.
✓ Local service utilities serving new development shall be located underground,
wherever reasonably feasible.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 18 of 21
Staff Comment: The replacement sewer and associated laterals will be entirely
underground. The only permanent above-ground feature, a small generator, will be
screened and located outside the shoreline buffer.
✓
In areas where utility installations would be anticipated to significantly alter natural
groundwater flows, a barrier or conduit to impede changes to natural flow
characteristics shall be provided.
Staff Comment: The project’s design avoids deep excavation or permanent alteration of
groundwater flow patterns. Trench backfill and dewatering measures will follow
geotechnical recommendations to maintain natural groundwater characteristics.
✓
Utilities shall be located and designed to avoid natural, historic, archaeological or
cultural resources to the maximum extent feasible and mitigate adverse impacts
where unavoidable.
Staff Comment: The applicant will prepare an Inadvertent Discovery Plan (IDP) and notify
tribal representatives prior to construction. No known archaeological sites are present, and
the project will avoid sensitive areas to the extent feasible.
✓
Utilities shall be located, designed, constructed, and operated to result in no net loss
of shoreline ecological functions with appropriate on- and off-site mitigation including
compensatory mitigation.
Staff Comment: By removing or filling in obsolete in-lake infrastructure and restoring
disturbed areas with native vegetation, the project will result in an overall ecological benefit
and achieve no net loss of shoreline function.
✓
All utility development shall be consistent with and coordinated with all local
government and State planning, including comprehensive plans and single purpose
plans to meet the needs of future populations in areas planned to accommodate
growth.
Staff Comment: The project is part of the City’s long-term sanitary sewer infrastructure plan
and is coordinated with King County and the Washington Department of Ecology to ensure
regional consistency.
✓
Local service utilities serving new development shall be located underground,
wherever reasonably feasible.
Staff Comment: All new utilities will be buried below grade within public right-of-way,
consistent with this requirement.
✓
Site planning and rights-of-way for utility development should provide for compatible
multiple uses such as shore access, trails, and recreation or other appropriate use
whenever possible. Utility right-of-way acquisition should be coordinated with
transportation and recreation planning.
Staff Comment: All work will occur within existing developed corridors that already
accommodate transportation and utility uses. No additional right-of-way or land alteration
for recreation or public access is proposed.
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 19 of 21
✓
Vegetation Conservation:
(a) Native vegetation shall be maintained whenever reasonably feasible.
(b) When utility projects are completed in the water or shoreland, the disturbed area
shall be restored as nearly as possible to the original condition.
(c) All vegetation and screening shall be hardy enough to withstand the travel of
service trucks and similar traffic in areas where such activity occurs.
Staff Comment: The Vegetation Management Plan (Exhibit 9) provides restoration
measures using native species in all disturbed areas. Temporary impacts will be fully
restored, and replacement plantings will be monitored for three years to ensure success.
✓
Local Service Utilities, Specifications, Sanitary Sewer:
(a) The use of outhouses or privies is prohibited. Self-contained outhouses may be
allowed for temporary, seasonal, or special events.
(b) All uses shall hook to the municipal sewer system. There shall be no septic tanks
or other on-site sewage disposal systems.
(c) Sewage trunk lines, interceptors, pump stations, treatment plants, and other
components that are not water-dependent shall be located away from shorelines
unless:
(1) Alternative locations, including alternative technology, are demonstrated to be
infeasible.
(2) The facilities do not result in a net loss of shoreline ecological functions.
(3) The facilities do not result in significant impacts to other shoreline resources and
values such as parks and recreation facilities, public access and archaeological,
historic, and cultural resources, and aesthetic resources.
(d) Storm drainage and pollutant drainage shall not enter the sanitary sewer system.
(e) During construction phases, commercial sanitary chemical toilets may be allowed
only until proper plumbing facilities are completed.
(f) All sanitary sewer pipe sizes and materials shall be approved by the Public Works
Department.
Staff Comment: The project replaces an aging lake-based sewer system with a modern,
land-based system connecting to the City’s municipal sewer network. No on-site disposal
systems are proposed, and the design complies with City standards for pipe size, materials,
and connection. The project location and methods ensure no net loss of shoreline function
and eliminate the potential for future wastewater discharge to Lake Washington.
Development of this project shall be undertaken pursuant to the following terms and conditions:
1. The applicant shall comply with the mitigation measure issued as part of the Determination of Non-
Significance – Mitigated (DNS-M) issued on September 23, 2025 for the Kennydale Lakeline Sanitary Sewer
Improvement project:
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 20 of 21
1) The applicant shall submit an Inadvertent Discovery Plan (IDP) prepared by a qualified professional
prior to the start of any construction. In addition, the applicant shall provide notification to Tribes’
cultural committee prior to the start of construction.
This Permit is granted pursuant to the Shoreline Management Action of 1971 and pursuant to the following:
1. The issuance of a license under the Shoreline Management Act of 1971 shall not release the applicant from
compliance with federal, state, and other permit requirements.
2. This permit may be rescinded pursuant to Section 14(7) of the Shoreline Management Act of 1971 in the
event the permittee fails to comply with any condition(s) hereof.
3. Construction permits shall not be issued until twenty-one (21) days after approval by the Washington State
Department of Ecology or until any review proceedings initiated within this twenty-one (21) day review period
have been completed.
DATE OF DECISION ON LAND USE ACTION:
SIGNATURE:
________________
Matthew Herrera, Planning Director
Department of Community & Economic Development
Date
APPEALS: Appeals of Shoreline Substantial Development Permit issuance must be made directly to the Shorelines
Hearings Board. Appeals are made by filing a request in writing within the twenty-one (21) days of receipt of the final
order and concurrently filing copies of such request with the Washington State Department of Ecology and the
Attorney General’s office as provided in section 18(1) of the Shorelines Management Act of 1971. All copies of appeal
notices shall also be filed with the City of Renton Planning Division and the City Clerk’s office.
EXPIRATION: Unless a different time period is specified in the shoreline permit as authorized by RCW 90.58.143
and subsection J1 of RMC 4-9-190, construction activities, or a use or activity, for which a permit has been granted
pursuant to this Master Program must be commenced within two (2) years of the effective date of a shoreline permit,
or the shoreline permit shall terminate, and a new permit shall be necessary. However, the Planning Division may
authorize a single extension for a period not to exceed one year based on reasonable factors, if a request for
extension has been filed with the Planning Division before the expiration date, and notice of the proposed extension
is given to parties of record and the Washington State Department of Ecology. DEFINITION OF COMMENCEMENT
OF CONSTRUCTION ACTIVITIES: the construction applications must be submitted, permits must be issued, and
foundation inspections must be completed before the end of the two (2) year period.
cc: Office of Attorney General
City of Renton Official File
Duwamish Tribe
King County Wastewater Treatment Division
Washington Department of Ecology
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB
11/13/2025 | 4:20 PM PST
City of Renton Department of Community & Economic Development Shoreline Management Permit
Kennydale Lakeline Sanitary Sewer Improvement Project LUA25-000219, ECF, SSDP
DATE OF PERMIT: November 13, 2025 Page 21 of 21
CITY OF RENTON
DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT
ADMINISTRATIVE REPORT & DECISION
EXHIBITS
Project Name:
Kennydale Lakeline Sanitary Sewer
Improvement Project
Project Number:
PR25-000049 / LUA25-000219
Date of Report
November 13, 2025
Staff Contact
Alex Morganroth
Principal Planner
Project Contact/Applicant
Anousheh Nawaz, City of Renton /
1055 S Grady Way, Renton, WA 98057
/ 425-430-7226 /
Anawaz@rentonwa.gov
Project Location
See Exhibit 2
The following exhibits are included with the Administrative Decision Report:
Exhibits 1–17: As shown in the Environmental Review Committee (ERC) Report, dated September
22, 2025
Exhibit 18:
Exhibit 19:
Administrative Decision
Determination of Non-Significance, Mitigated (DNS-M), issued September 23, 2025
Docusign Envelope ID: 24AF222C-DAE2-440E-AD5A-F622478015FB