HomeMy WebLinkAboutNOA_ERC_Determination_DNSM_ThunderHillsSewer_181221.pdfDEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT
Planning Division
1055 South Grady Way, 6th Floor | Renton, WA 98057 | 425-430-7200, ext. 2
www.rentonwa.gov
OF ENVIRONMENTAL DETERMINATION
ISSUANCE OF A DETERMINATION OF NON-SIGNIFICANCE - MITIGATED (DNS-M)
POSTED TO NOTIFY INTERESTED PERSONS OF AN ENVIRONMENTAL ACTION
DNS-M: The City Of Renton Environmental Review Committee (ERC) has determined that the proposed action has
probable significant impacts that can be mitigated through mitigation measures.
DATE OF NOTICE OF ENVIRONMENTAL
DETERMINATION:
December 21, 2018
PROJECT NAME/NUMBER: Thunder Hills Sewer Interceptor Rehabilitation /
LUA18-000678, ECF
PROJECT LOCATION: Gated entrance at Grant Ave S and S 18th St and runs the length of Thunder
Hills Creek North just up to before it goes under I-405
LOCATION WHERE APPLICATION MAY
BE REVIEWED:
Applicant documents are available online through the City of Renton
Document Center website. See also https://bit.ly/2QQkU3Q
PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review for improvements
to approximately 2,050 lineal feet of sewer main. The sewer line would be improved through a mix of parallel HDPE
pipelines and rehabilitation of the existing line using a cured-in-place lining technology. In addition, improvements are
proposed to the 37,574 square foot maintenance access road and slope stability measures are proposed to alleviate
erosion in the future. The project site includes Thunder Hills Creek, a type Np stream with a 75-foot buffer, and seven
tributary streams, all classified as Type Ns streams with 50-foot buffers. There are six wetlands (Wetlands A-F). Of the
six wetlands, four (Wetlands B, D, E, and F) would have a standard buffer of 100 feet, Wetland A would have a standard
buffer of 75 feet, and Wetland C would have a standard buffer of 50 feet. The proposal would include 20,703 square feet
of temporary wetland and stream buffer impacts, 1,332 square feet of wetland impacts (Wetland E and F), and 41,000
permanent buffer impacts including the removal of 36 trees. The project site includes RM-F and R-8 zoning designations.
Access to the site would be provided via a gated entrance off of Grant Ave S and S 18th St as well as an existing entrance
at the cleared PSE easement access along S 18th St.
Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on January 4, 2019,
together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057.
Appeals to the Examiner are governed by City of RMC 4-8-110 and information regarding the appeal process may be
obtained from the Renton City Clerkâs Office, (425) 430-6510.
PUBLIC HEARING: If the Environmental Determination is appealed, a public hearing will be set
and all parties notified.
NOTICE