The Kooskooskie Dam was a 9 foot high concrete dam that was a decommissioned water diversion for the city of Walla Walla. The dam blocked 32 miles of pristine spawning habitat in the upper Mill Creek watershed. The dam had been in place since 1907 and although decommissioned remained on the landscape for decades. The dam and sediment that had accumulated upstream were removed, and over 680 feet of stream and associated riparian habitat was restored. This project was funded by the SRFB and WDFW.