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~ the existing Barrier Dam. Municipal ities to be provided with supple- mental water include Pueblo, Colorado Springs, and val ley towns aiong the Arkansas River. The val ley towns, including Las Animas, wi I I be served by a trunk pipel ine about 130 mi les in length extending down- stream from Pueblo Reservoir. In addition, the towns of Crowley, Eads, and Wi ley wi II be served by branch pipel ines total ing about 36 mi les in length. Hydroelectric power wi I I be generated at seven power plants located on the eastern slope. 36. The Pueblo Reservoir wi I I have a capacity of about 400,000 acre-feet of wh ich 93,000 acre-feei is allocated to flood control. The Corps of Engineers wi I I have the responsibi I ity of prescribing regula- tions for the use of the flood control storage, as specified under Section 7 of the 1944 Flood Control Act. About one-third of the Arkansas River Bas i n above Las An i mas will be contro I I ed by the Pueb 10 Dam; however, storms occurring over the large uncontrol led drainage area below the dam could produce major floods at Las Animas. An impor- tant effect of the project with respect to the flood problem at Las Animas wi II be the reduction of flood peaks and frequency of overf low from floods originating above Pueblo. It is estimated that if this project had been in operation prior to the 1921 flood, the flood peak of 187,000 c.f.s. at Las Animas would have been reduced to 108,000 c. t.s. 37. REMAINING WATER RESOURCES PROBLEMS AND NEEDS.- The existing projects and the authorized projects wi I I make a significant contribu- tion toward meeting the major water resources needs in the Arkansas River Basin. The Trinidad Dam and Reservoir Project wi I I afford a high degree of protection to Trinidad and vicini*y from floods on the Purgatoire River, and optimum regulation of river flows for irrigation. In addition, it wi II provide a much-needed recreational faci I ity. The Fryingpan-Arkansas Project wi I I bring additional water into the basin to alleviate irrigation shortages; make more water avai lable for mu- nicipal and industrial purposes at Pueblo, Colorado Springs, Las Animas, and other towns; provide hydroelectric power and recreational oppor- tunities; and reduce flooding on the main stem of the Arkansas River between Pueblo and John Martin Dam. " 38. Nevertheless, there wi I I be many unsolved problems, even after completion of the authorized projects. Although Pueblo Dam wi I I reduce flooding on the main stem from Pueblo to John Martin Dam, the uncon- trolled triblltary inflow below the dam wi II cause flood problems at La Junta and Las Animas, and throughout much of the agricultural area. There wi I I be main stem flood problems also at Florence, Portland, and other local ities above the Pueblo dam site. Flood prOblems known to exist from tributary streams that would not be affected by the authorized projects include Coal Creek at Florence, Dry Creek and Fountain Creek at Pueblo, Fountain Creek at Colorado Springs, King and Anderson Arroyos at La Junta, Huerfano River at Walsenburg, and Wolf Creek at Granada. 13