DESCRIPTION
The Pacific Watershed Institute (PWI) completed an assessment of the Twisp River Watershed to aid in the development of a salmonid protection and restoration strategy with prioritized restoration activities. The assessment includes analyzing what changes in geomorphic, hydrologic and biological elements would aid reconstruction of watershed function. The goal of the assessment was to identify and prioritize key habitat areas and watershed processes for protection and restoration. The Twisp River is a major tributary to the Methow River, and it supports 20-30% of the endangered Spring Chinook population in the Methow. It also supports endangered summer steelhead, and cutthout trout and is a stronghold for bulltrout. The lower Twisp was listed as water quality impaired for temperature and instream flow. Past assessment and restoration activities in the Chewuch Watershed generated community and agency support for similar focused efforts in other sub-watersheds. The community and Methow Limiting Factors Analysis had identified the Twisp River watershed as a high priority area. Although the Okanogan National Forest completed a watershed analysis of part of the Twisp Watershed, it did not completely cover private lands in the lower mainstem and tributaries where agricultural and developmental pressures are affecting aquatic habitat conditions. The outcomes and benefits of this assessment, based on protocols successfully applied in the Chewuch, are integrated, appropriate, and effective restoration strategies and priorities for the entire watershed.