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10'1,. (.. ., AUTHORIZED PLAN The Narrows Unit will be located in northeastern Colorado along the South Platte River. Lands to be served by the Unit are in Adams, Weld, Morgan, Logan, Washington, and Sedgwick Counties. The Unit will provide supplemental irrigation, flood control, recreation enhancement, fish and wildlife conservation and development, highway improvement, and potential future municipal and industrial water supplies. Features to be constructed for these purposes are Narrows Dam and Reservoir, a fish hatchery, rearing ponds, and public USe recreation areas. The existing privately owned Jackson Lake Dam and Reservoir will be purchased by the United States and converted from irrigation use to recreation and fish and wildlife uses. In addition, 15,765 acres of project land will be set aside for a wildlife management unit, and a 5~-mile- long cold-water fishery will be established downstream from Narrows Dam. The fish hatchery and rearing ponds will assure .an adequate supply of fish stock for the Unit. The inclusion of municipal and industrial (M&I) water as a function of the Unit is a potentiality that could develop in the future should the needs for such water develop in the South Platte Valley. In the event that Narrows Unit water is converted from irrigation to M&I uses, the contracting entity will pay interest on that portion of the costs allocable to the M&I water supplied. The interest rate will be determined in accordance with Section 6, Public Law 91-389 (Narrows Unit Authorizing Act). The Unit will be operated in such a manner that identifiable return flows will not violate water quality standards established by the State of Colorado for the South Platte River and approved by the Secretary of Interior pursuant to the Water Quality Act of 1965 (79 Stat. 903). In fact, it is anticipated that operation of the Unit will result in improvement of the water quality of low flaws in the South Platte River. Narrows Dam, to be located about 7 miles upstream from Fort Morgan, will be an earthfill structure 146 feet high and about 22,100 feet long. The reservoir will have a total controlled capacity of 973,18~acre-feet at the top of the flood control pool. Of that capacity, 475,000 acre-feet are exclusively for flood control, 75,000 acre-feet for joint flood control and irrigation, 373,025 acre-feet for irrigation, and 50,160 acre-feet are inactive and dead capacity. Except for direct deliveries from the reservoir to the Fort Horgan Canal, irrigation water from the reservoir will be delivered via the South Platte River to the headworks of existing irrigation systems. Therefore, an irrigation distribution system will not be constructed. S