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proceeding with a solicitation for a new contract to redo the generator and to uprate the second generator. The National Park Service administers recreational facilities. In 1989 there were 1,125,447 visitors (latest available figures). 5. STORAGE UNITS FISHERY INFORMATION The Flaming Gorge, Wayne N. Aspinall, Glen Canyon, and Navajo Units continue to provide excellent warm-and cold-water fishing, both in the reservoirs and in tailwater streams below the dams, Use on the res- ervoirs currently totals over a million angler days each year. Lake Powell provides over half of the total use, with the remainder coming equally from the other reservoirs. Lake Powell is almost exclusively a warm-water fishery with striped bass, crappie, walleye, channel catfish, and largemouth bass as the harvested species, Navajo and Flaming Gorge provide both warm-water and cold-water fishing, with trout and kokanee the predominant cold-water harvest and catfish, bass, and crappie (at Navajo) the preferred warm-water fishes, The Aspinall reservoirs are exclusively cold-water fisheries, with kokanee and rainbow trout the predominant catch. The four tailwaters have provided "blue ribbon" trout fishing that many view as some of the best in the western United States, Combined, the annual use of these tailwaters exceeds 200,000 angler days annually. The San Juan River below Navajo Dam receives about half of the total use with the Colorado River (below Glen Canyon), the Green River (below Flaming Gorge), and the Gunnison River (below Crystal) providing the remain- der. Restrictions on fishing gear and the allowable harvest have been re- quired on these rivers to insure quality use as fishing pressure increases annually. Estimates of the value of a day's fishing on these quality streams range from $20 to $100 per day, based on travel cost studies. Using those estimates, the value of these tailwater fisheries could approach $20 million annually, Even more importantly, these values tend to increase each year as trout fishing opportunities become better known. 39