Dutch Charlie Creek Sediment Reduction and Fisheries Recovery Project

In this project, approximately 6.2 miles of road was successfully storm-proofed, including 77 sediment delivery features comprised of 59 stream crossings, 11 potential fillslope failures, and 7 ?other? feature types including springs, bank erosion, or road surface drainage problems. Approximately 5.87 mi of road was decommissioned and another 0.33 mi of road upgraded to gain access to the areas needing decommissioning. Successfully treating the project roads required excavating a total of approximately 23,000 yd3 of sediment and/or debris directly from the 77 treatment features. PWA estimates that treating the project sites will prevent the future delivery of approximately 11,400 yd3 of eroded sediment to the stream system, were the storm proofing treatments not applied. Even though approximately 1.29 mi. of low priority road was not treated, more sites than originally contracted were ultimately treated in this project resulting in a greater sediment savings than originally estimated.

By permanently decommissioning 7.23 miles of hydrologically connected, abandoned, legacy inner gorge and riparian road, this project will prevent approximately 11,304 yd3 of sediment from entering the Dutch Charlie Creek watershed by treating 72 individual features.