Thornton Creek Confluence Project

Location: Seattle, WA
Owner: City of Shoreline

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.

Fish Passage and Habitat Restoration

Service Details >>

Services List
  • Fish Passage Analysis and Design
  • Stream and Habitat Restoration
  • Bioengineered Bank Stabilization
  • Wetland Restoration
  • Barrier Assessment
  • Hydrologic and Hydraulic Modeling
  • Alternatives Analysis
  • Large Woody Debris (LWD) Design
  • Environmental Permitting and Documentation
  • Temporary Erosion and Sediment Control (TESC)
  • Construction PS&E
  • Construction Services
Service Contact
Matthew Gray, PE
Practice Lead

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