DESCRIPTION
This project highlights the additional work done outside of PRISM project 05-1442.
Squaxin Island Tribe added over 60 logs, including 20 key pieces, in several log jams over 300 feet of the highly incised mainstem of Skookum Creek near Shelton to create pool-riffle and cover structure. In addition, over 2000 cubic yards of streambank material was excavated to begin to form a new floodplain. The disturbed area was revegetated with native plants. The work was conducted as Phase II of a watershed restoration effort to mitigate for channel impairment. Phase I was completed in summer 2005. Each phase is an intermediate step until the riparian buffers mature sufficiently to reestablish the process of natural wood recruitment into the stream channel.
The project site (T19N, R3W, S19) was located within the Squaxin Island Tribe's homeland boundaries between RM 1.0 and 2.0 of Skookum Creek. This watershed is included in the usual and accustomed grounds of the Squaxin Island Tribe (SIT) reserved in 1854 Medicine Creek Treaty with the U.S. Government.
Declines in habitat quantity and quality along with poor ocean returns threatened the continued survival of naturally reproducing chum and coho populations of Skookum Creek. Timing was critical because land-use change was accelerating in this valley and threatening salmonid habitat.
Literature (Montgomery et al, 2003; Abbe et al, 2003) supports the ecological role and overwhelming importance of LWD in Northwest streams. Without regular and ongoing recruitment of large confers into the stream channel, channel hydraulics and the ability to transport and store sediment had become impaired.