Completion Report East Fork Salmon River EF/10 and EF/11 Irrigation Diversion Consolidation Project Upper Salmon Subbasin Salmon, Idaho. Completion Report

摘要

Throughout the Salmon River subbasin, irrigation diversions have negatively affected salmonids by reducing instream water flows, creating migration barriers, and entrapping juvenile fish in the diversions as they migrate downstream. In 2003, two diversions in the East Fork (EF) Salmon River were consolidated into a single point of diversion with improved fish passage. The primary purpose of the EF-10 and EF-11 diversion consolidation was to reduce the impacts of the irrigation diversions during the irrigation season to anadromous adult and juvenile salmon and steelhead and resident fish species in the East Fork Salmon River. The East Fork Salmon River provides habitat for several species of fish listed as either threatened or endangered under the Endangered Species Act (ESA), as well as resident fish. Section 7(a)(2) of the ESA requires that all Federal agencies consult with the National Oceanic and Atmospheric Administrative Fisheries Services (NOAA Fisheries), and the U.S. Fish and Wildlife Service (USFWS), to ensure that any action authorized, funded, or carried out by such agency will not likely jeopardize the continued existence of any endangered or threatened species, or result in adversely modifying their critical habitat. NOAA Fisheries oversees the implementation of the ESA for certain listed species including anadromous salmon and steelhead.