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,. 1'1 Z~ .-' stored in Narrows Reservoir would be released either into the South Platte River through a river outlet for delivery to existing downstream diversion works and through a canal outlet works directly into the Fort Morgan Canal. Minimum downstream flows for fishery requirements would be met by stream accretions, return flows, flows for operating the fish hatchery, and minor releases from reservoir storage. Major recreational facilities would be constructed as a part of the project. It is estimated that approximately 1,225,000 visitor days could be anticipated at the reservoir area within the first year of operation, with a rapid increase thereafter. proiect Statistics Estimated Allocation Costs: Total Cost $ 19,234,000 69,528,000 36,737,000 13,352,000 675,000 $139,526,000 Flood Control Irrigation Recreation Fish and Wildlife Highway Improvement Narrows Reservoir capacity (acre-feet): Benefit-cost ratio 50,000 373,000 75,000 475,000 636,000 1,609,000 a. f, 119 , 000 a. f, 1. 5 to 1 Dead and inactive Irrigation Joint use (irrigation, flood control and sediment) Flood control Surcharge Total Capacity Estimated annual irrigation yield Environmental Impact The principal environmental impact of the Narrows project will be the inundation of several miles of stream channel by the reservoir. No significant stream fishery now exists in that portion of the river. However, a considerable reservoir fishery will be created by the water impounded in the reservoir. Virtually all of the lands to be acquired for the reservoir are now in private ownership, Some loss of nesting sites for waterfowl and upland game birds will occur. However, waterfowl use of the area is expected to almost triple as a result of the increased water area which will be available as the result of the reservoir impoundment. The hunting area for small upland game, such as pheasants and rabbits, will be decreased, but will -2-