Reclamation Information Sharing Environment (RISE)

Fish passage limitations have been identified in several reservoir deltas and rivers throughout Reclamation’s Regions. In the Yakima River basin in Washington, delta dynamics have prevented or impaired Endangered Species Act (ESA)-listed bull trout and other salmonids from migrating between the reservoirs and upstream spawning habitat. This scoping study aimed to better understand the research needs associated with reservoir delta fish passage. The main goal of the scoping study was to develop a conducting proposal to submit in June of 2021 for fiscal years 2022 through 2024. The scoping study outcomes included a literature review, an investigation of available datasets, and the conducting proposal submission.