DESCRIPTION
The primary project objectives are to assess landowner willingness, conduct a project alternatives analysis,and
prepare 30% designs in order to reconnect 2,400 linear feet of historic channel and floodplain habitats at Peshastin
Creek. This reconnection will lead to increased refuge and rearing habitat, increased floodplain connectivity, and the
restoration of natural channel processes in the project reach.
The CCNRD proposed the Peshastin Creek Reconnection Alternatives Analysis to complete Alternatives Analysis and stakeholder coordination to begin the largest channel reconnection project on Peshastin Creek. The US 97 highway grade has disconnected historic channel and floodplain habitat between RM 3.56 and RM 3.90. This project proposed the reconnection of 2,400 linear feet of creek channel effectively lengthening the channel by 600 feet. The reduction in length at this site accounts for 14% of the total reduction in channel length attributed to construction of US 97. Peshastin Creek is a Category 2 watershed and contains Major spawning area for steelhead and minor spawning area for spring Chinook, and is a bull trout core area (UCRTT 2008). The restoration of ecosystem function through channel reconnection is a priority in Peshastin Creek (UCRTT 2009), and the completion of reconnection would addresses Tier 1 habitat restoration as recommended in the Biological Strategy (UCRTT 2008), and Recovery Plan (UCSRB 2007) for Peshastin Creek.
The CCNRD has been working with WSDOT to provide a long-term fix at the project site that benefits ESA-listed salmonids through full channel reconnection. The CCNRD used data presented in the Yakama Nation Peshastin Creek Reach Assessment, LiDAR, and information collecte onsite to develop and analyze design alternatives and select the highest priority action.