HomeMy WebLinkAboutNOA DNSM_15-000033_Maplewood Creek Outfall Improvements
If you would like to be made a party of record to receive further information on this proposed project, complete this
form and return to: City of Renton, CED – Planning Division, 1055 So. Grady Way, Renton, WA 98057.
Name/File No.: Maplewood Creek Stormwater Outfall Improvements/LUA15-000033, ECF, CAE
NAME:
MAILING ADDRESS: City/State/Zip:
TELEPHONE NO.:
NOTICE OF APPLICATION AND PROPOSED DETERMINATION OF
NON-SIGNIFICANCE-MITIGATED (DNS-M)
A Master Application has been filed and accepted with the Department of Community & Economic Development
(CED) – Planning Division of the City of Renton. The following briefly describes the application and the necessary
Public Approvals.
DATE OF NOTICE OF APPLICATION: January 23, 2015
LAND USE NUMBER: LUA15-000033, ECF, CAE
PROJECT NAME: Maplewood Creek Stormwater Outfall Improvements
PROJECT DESCRIPTION: The applicant, the City of Renton, is requesting Environmental (SEPA) Review
and a Critical Areas Exemption to re-route two stormwater outfalls that discharge at the top of a hillside slope to a catch
basin at the intersection of Chelan Ave SE and SE 2nd Place and a new outfall in the southwest corner of 4515 SW 2nd St
(PID 2816300100) at the bottom of the hillside west of the Maplewood Creek Class 3 stream and associated Category 3
wetland. Approximate areas of work are 3,200 sf of public right-of-way and 1,300 sf of private property within the
Residential-8 zone designation. The two outfalls closest to SE 4th Pl have resulted in erosion of the hillside and west
bank of the stream and would be capped and abandoned. Stormwater flow would be redirected north within the public
right-of-way through 700 feet of new 12- to 18-inch diameter subsurface pipe to the catch basin at Chelan Ave SE and SE
2nd Place, then directed in 32 feet in new 24-inch diameter pipe onto private property to the northeast and the top of
the hillside, where the pipe would be reduced to 16-inch diameter and daylighted and extended approximately 47 feet
overland down the slope to a new 48-inch dissipater manhole structure. No trees would be impacted. Critical areas
include the stream, wetland, aquifer protection area, regulated slopes, and erosion hazards. The project would result in
temporary impacts of 1,200 sf of critical areas buffers for site access and construction. The new overland pipe, outfall,
and energy dissipater pad will result in 155 sf of permanent buffer impact. Approximately 1,355 sf of buffer restoration
and enhancement are proposed. Studies provided are a geotechnical report, hydrologic/hydraulic analysis, and
supplemental wetland and stream study and buffer restoration plan.
PROJECT LOCATION: 4515 SE 2nd St and Right-of-way on Chelan Ave SE between SE 4th Pl and SE 2nd Pl
OPTIONAL DETERMINATION OF NON-SIGNIFICANCE, MITIGATED (DNS-M): As the Lead Agency, the City of Renton has
determined that significant environmental impacts are unlikely to result from the proposed project. Therefore, as
permitted under the RCW 43.21C.110, the City of Renton is using the Optional DNS-M process to give notice that a
DNS-M is likely to be issued. Comment periods for the project and the proposed DNS-M are integrated into a single
comment period. There will be no comment period following the issuance of the Threshold Determination of Non-
Significance-Mitigated (DNS-M). This may be the only opportunity to comment on the environmental impacts of the
proposal. A 14-day appeal period will follow the issuance of the DNS-M.
PERMIT APPLICATION DATE: January 20, 2015
NOTICE OF COMPLETE APPLICATION: January 23, 2015
APPLICANT/PROJECT CONTACT PERSON: Allen Quynn /City of Renton /1055 S Grady Way /Renton, WA 98057/
425-430-7247/aquynn@rentonwa.gov
Permits/Review Requested: Environmental (SEPA) Review and Critical Areas Exemption
Other Permits which may be required: Building Permit, Construction Permit
Requested Studies: Geotechnical Report, Hydrologic/hydraulic Analysis, Stream &
Wetland Study, Critical Areas Buffer Restoration Plan
Location where application may
be reviewed: Department of Community & Economic Development (CED) – Planning
Division, Sixth Floor Renton City Hall, 1055 South Grady Way, Renton,
WA 98057
CONSISTENCY OVERVIEW:
Zoning/Land Use: The subject site is designated Residential Single Family (RSF) on the City
of Renton Comprehensive Land Use Map and Residential-8 (R-8) on the
City’s Zoning Map.
Environmental Documents that
Evaluate the Proposed Project: Environmental (SEPA) Checklist, Hydrologic/hydraulic Analysis, and
Supplemental Wetland and Stream Study and Buffer Restoration Plan
Development Regulations
Used For Project Mitigation: The project will be subject to the City’s SEPA ordinance, Renton
Municipal Code 4-3-050 Critical Areas Regulations and other applicable
codes and regulations as appropriate.
Proposed Mitigation Measures: The following Mitigation Measures will likely be imposed on the proposed
project. These recommended Mitigation Measures address project impacts
not covered by existing codes and regulations as cited above.
Follow recommendations of the geotechnical report, and
Remove invasive plants and add native plantings in areas of work
within the regulated stream and wetland areas.
Comments on the above application must be submitted in writing to Kris Sorensen, Associate Planner, CED – Planning
Division, 1055 South Grady Way, Renton, WA 98057, by 5:00 PM on Feburary 6, 2015. If you have questions about this
proposal, or wish to be made a party of record and receive additional notification by mail, contact the Project Manager.
Anyone who submits written comments will automatically become a party of record and will be notified of any decision
on this project. A copy of the subsequent threshold determination is available upon request.
CONTACT PERSON: Kris Sorensen, Associate Planner; Tel: (425) 430-6593; Eml:
ksorensen@rentonwa.gov
PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION