Sauk Prairie Road / Mouse Creek Drainage Improvement Project


Snohomish County Public Works is proposing to remove a berm and excavate 250 linear feet of sediment from Mouse Creek in order to ease flooding over Sauk Prairie Road. Flooding occurs over the road, approximately three miles northeast of Darrington, during times of high precipitation due to the buildup of sediment. The project will also improve passage for Coho and other species of fish. 


  • 2017: Preliminary design phase
  • 2018: SEPA, permitting and design
  • 2019: Construction

Environmental Review

On May 10, 2018, Public Works determined that this project does not have a probable, significant adverse impact on the environment and has issued a Determination of Non-Significance (DNS). An environmental impact statement (EIS) under RCW 43.21C.030(2)C is not required. This decision was made after review of SEPA documents and other information on file with this agency.

SEPA Appeal: There is no opportunity for appeal at this time. Pursuant to SCC 30.61.300(3), SEPA appeals related to a land disturbing activity permit, which is a Type 1 decision, shall be submitted to the Hearing Examiner together with appeal of the underlying permit.