DESCRIPTION
The goal of the project is to restore fish passage to 2 miles of spawning and rearing habitat for chum, Coho, and steelhead, on tributary channel 15.0187, in the Curley Creek watershed. Grant funds will be utilized to remove the fishway/barrier, restore the stream channel and replace the road crossing with a bridge or other fish passable structure. There is a 20 foot high earthen dam impounding the tributary channel 15.0187 at the confluence with Curley Creek. A four-foot wide concrete weir-pool fishway provides fish passage from Curley Creek into the 2 mile long tributary. Fish have to navigate 12 weirs that average about 12 inches high each. A roadway crosses the channel atop the fishway and earthen embankment. Additional problems with the fishway are the drop barrier at the outfall pool, the dam acting as a hydraulic control, and the total blockage of sediment transport and disconnection of stream morphology. The WDFW fishway assessment report notes the concrete weir has an excessive outfall drop of approximately 18 inches and an undersized low flow notch classifying the fishway as a partial passage barrier with an estimated passability of 67%. The concrete fish weir and associated pond and water control bypass are in poor condition and failure could result in flows that further restrict fish passage or render the structure impassable. Also, the dam bypass is not screened and fish passage likely leads to mortality.