All projects must comply with state and federal laws, including the Wilderness Act of 1964, the Alpine Lakes Wilderness Act of 1976, and the Alpine Lakes Wilderness Management Plan of 1981.
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structures that control the release of water from these lakes, were constructed between 1929 and 1949 and are now outdated.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.
The IPID diversion fish screen was replaced based on current design criteria and fish protection requirements accepted by Washington Department of Fish and Wildlife and the National Marine Fisheries Service.
The project consisted of installation of new fish screening and raw-water delivery infrastructure for the City of Leavenworth’s municipal water intake made necessary by construction of the step-pool passage channel and improving passage above the Boulder Field.
