DESCRIPTION
The project was completed in 2011. The two side by side 24" X 156' concrete culverts were replaced with one stream simulation design 67.5' long, 20'4" wide x 17'9" rise, corrugated aluminum multi-plate culvert. The final cost was about $1.3 million using Pierce County Stormwater Management funds.
Site is located on arterial with associated public right-of-way which borders two parcels which are both owned by the Erivan Haub family.
Project Need:
Two existing 24" culverts, one of which has collapsed, under Warren Drive is blocking access to 5,300 feet of high quality upstream habitat on Warren Creek,a tributary to Hale Passage in Puget Sound near Gig Harbor, WA.
Project Goals:
1) Restore anadromous fish access to 5,300 fee of upstream habitat.
2) Reconnect high quality estuarine habitat with upstream habitat.
3) Restore natural flow and sediment transport regimes.
4) Increase community awareness of fish presence in Warren Creek and other local area creeks.
Project Scope:
Replace existing culverts with an open bottomed structure at least 12 feet wide and 8 feet high on Warren Creek. The existing culverts are located under 35 feet of fill material so additional site preparation and grading will be necessary. Post construction revegetation and site stabilization.
Expected Outcomes:
Restored use of 5,300 feet of upstream spawning habitat by Coho, Chum, and Sea-run Cutthroat.
Community Involvement:
Warren Drive is a well-travelled arterial. Our intention is to use this feature as an opportunity before, during, and after construction to educate local residents on salmon presence, salmon habitat, and passage barriers. We plan to partner with the Key Peninsula-Gig Harbor- Islands Watershed Council to offer presentations and tours of the project. In addition, we plan to work with Pierce County Stream Team to coordinate a volunteer planting event at the site post-construction.