Tibbetts Creek is located just to the west of Issaquah creek. flowing at around 4.3 miles long.

Tibbetts Creek originates on Squak Mountain as it flows north through Issaquah and into Lake Sammamish.

There have been several effort to restore the damaged Creek for over 10 years.

In 2002 more than 10,000 cubic yards of mine tailings were excavated from where the debris have been dumped into a gully along Tibbetts Creek.

Prior to excavation, heavy rains would wash large quantities of the tailing into the Creek. which stopped salmon and trout migration and caused downstream flooding.

A project built by Rowley Enterprises restored 1,800 feet of stream channel, complete with standing snags, strategically placed logs and is currently some of the best salmon habitat on Tibbetts Creek

Trout Unlimited is currently focused on two projects on Tibbetts Creek.

Project 1- Tibbetts sediment pond

Project 2- Riparian restoration in the Lake Sammamish State Park

Tibbets Sediment Pond

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This facility was installed and permitted as a sediment and flood control structure. Tibbets Creek experienced several flooding events in the late 1990's which inundated portions of the City of Issaquah. in response to the flooding several undersides culverts were replaced and the sediment was installed in 2003. TU believes that the sediment pond has outlived its purpose since the sorce of tailings was removed and the undersized culverts downstream have been replaced. the continued operation of this structor has depleeted the stream below the pond of spawning gravle needed by salmon.

 

Riparian Restoration 

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Trout Unlimited is partnering with the Snoqualmie Tribe and Washington State Parks to conduct the riparian restoration of 1000 feet of Tibbets Creek and 700 feet of tributary #0170 within Lake Sammamish State Park.

This projects elements would include removing non-native pants, re-establishing native vegetation which has been overgrown by invasive species of plants and cleared by beavers, exclusion of beavers from the replanted project areas, and continued maintenance to ensure success of the project.

This project on Tibbetts Creek would improve the water quality issues for the stream including: temperature, dissolved oxygen, bioassessment and bacteria.

Reestablishing native riparian plants on streams provides shade which reduce instream temperatures.

Reduced instream temperatures allow water to physically hold more oxygen.

Improved riparian areas absorb nutrients and filter bacteria entering and within the stream.