Upper Peshastin Barrier Conceptual Design

This is Phase One of a proposed three phase project. Phase 2 will be the development of preliminary and final designs and Phase 3 construction. At this point we are on hold from executing Phase 2, citing a lack of landowner willingness to identify any of the alternatives that would result in a feasible path forward for Phases 2 & 3. That said, it is of the opinion of CCNRD and its agents, as well as WDFW staff working collaboratively on this project that as more fish data is collected through State efforts, the landowner opposition of Phases 2 & 3 will subside and the overall project will move forward. As of this writing, WDFW has installed additional detection infrastructure around this site (not captured here due to timing constraints) and has undertaken more field efforts to document fish use of this and upper reaches of Peshastin Creek.

The goal of the overall project is to improve steelhead access to the upper reaches of Peshastin Creek. Project objectives for Phase One included, identifying species of fish, size range and migration timing, collecting data including: topographical survey, water surface elevations, geomorphic conditions and velocities. Deliverables within this report include hydraulic modes with velocities and depths, calculated fish passability, conceptual designs and cost estimates based on the passage assessment and geomorphic assessment. As part of the deliverables which phases 2 & 3 rely upon stakeholder input and their selected preferred alternatives are included as well.

To identify whether a passage restoration project was geologically feasible, then develop ceonceptual designs and identify preferred alternatives through coordination with stakeholders WSDOT, USFS, and WDFW. The primary species is ESA listed Steelhead.