DESCRIPTION
This project restored 6 active beaver colonies to the lower Chewuch River, and thereby returned key watershed processes that were missing for 200 years. Beaver Restoration is a prescribed action in the Upper Columbia Spring Chinook Salmon and Steelhead Recovery Plan, the Chewuch Watershed Analysis, the Lower Chewuch Reach Assessment, and the Chewuch Watershed Action Plan. The recovery plan specifically lists beaver restoration as a contribution to productivity, abundance, diversity, and structure in Table 5.9 with contributions to Water Quantity Restoration, Water Quality Restoration, and Woody Debris Restoration.
The stated goals of this ongoing project continue to be to restore stream complexity, increase riparian vegetation, improve groundwater recharge, capture stream sediment, reduce stream temperature to mitigate the 303d listing in the Chewuch River, and delay stream runoff for later in the season. All these were achieved in 2013 in an ecologically compatible way with beavers.
In accomplishing these goals we met with willing landowners who had encounters with beavers. In some cases, as an alternative to lethal removal, we live trapped and moved unwanted beavers to our holding facility, where they were evaluated, weighed and measured, sexed, and grouped together with other beavers to prepare for release in the Lower Chewuch.
The Chewuch Basin provides spawning areas for approximately 25% of Spring Chinook salmon in the Methow Watershed, and also supports spawning steelhead, cutthroat trout, and bull trout. Water stored behind beaver dams and delivered later in the season, and cooler ground water arising from beneath beaver ponds are important mitigations for the climate change effects we are seeing today and will see much more significantly in coming years.
Education about the benefits of beavers for salmon habitat and adapting to climate change was a core project activity.
Conducting a highly rigorous study of the temperature and stream flow improvements realized with beaver restoration is an ongoing project component that was successful in this project phase.