Improve instream flow by about 40 cfs to enhance fish passage, promote healthy habitats, meet aesthetic and water quality objectives, and is resilient to climate change. Instream flow targets are 100 cfs in average years and 60 cfs in drought years.
Eightmile Lake is one of four Alpine Lakes managed by Icicle Peshastin Irrigation District (IPID) for irrigation water supply. The lake was altered to manage the release of water stored for irrigation water supply in 1929.
For nearly 100 years, five high lake reservoirs located in the Alpine Lakes Wilderness have provided water supplies for agriculture and fish production. The outlet structures that control the release of water from these lakes, were constructed between 1929 and 1949 and are now outdated.
The Leavenworth Fisheries Complex comprises three hatcheries located in Leavenworth, Winthrop, and Entiat, Washington. The hatcheries and associated facilities were constructed by Reclamation from 1939 to 1941 as mitigation for the construction of Grand Coulee Dam.
COIC has continuously diverted water from Icicle Creek at river mile 4.5 through a shared diversion with the Leavenworth National Fish Hatchery (LNFH) since 1940.
