Thornton Creek Confluence Project

Location: Seattle, WA

OCI was responsible for the TESC and stream bypass plan for this flood management and habitat restoration design project. Deliverables included plans and detail sheets, specifications, engineer’s cost estimate, and the Stormwater Pollution Prevention Plan (SWPPP). Challenges included:  bypass of a flashy, urban stream and isolation of the sediment pond during dredging. Construction in Meadowbrook Pond was completed in the 2012 fish window and Thornton Creek Confluence was constructed in the 2013 fish window.