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<br />, <br /> <br />the existing state of development with the authorized Pueblo Dam and <br />Reservoir in operation. The annual damages thus computed amount to <br />$56,500. The probable future development in the area was estimated <br />by an analysis of population growth and future agricultural income. <br />From this analysis, it was estimated that the damages would increase' <br />by an average of 45.64 percent over the next 100 years. Therefore, <br />the average annual damages under future conditions would be $82,300. <br /> <br />78. RELATED WATER RESOURCES PROBLEMS.- The municipal water supply <br />at Las Animas is adequate for current needs and wi I I very nearly satisfy <br />the anticipated needs for the next 100 years; however, the qual ity of <br />water is a problem. The water is very hard and highly mineral ized, <br />particularly from the shal low wel Is. The city has requested a treated <br />municipal water supply from the initial development of the authorized <br />Fryingpan-Arkansas Project to supplement the existing supply. The <br />water wi I I be del ivered by means of a trunk pipel ine from the pueblo <br />Reservo ir . Las An i mas sewage is treated in waste stab i I i zat i on ponds <br />in accordance with standards establ ished by the Colorado Department of <br />Pub I ic Hea Ith. <br /> <br />79. Irrigation reservoirs on minor tributaries in the vicinity <br />of Las Animas offer some recreational opportunities; however, the <br />fishery resources of the Arkansas River are extremely I imited because <br />of the irrigation diversions and the sal ine return flow. Since the <br />John Martin Reservoir is operated strictly for irrigation and flood <br />control and no permanent pool is maintained for publ ic recreation <br />including fish and wi Idl ife recreation, city officials have expressed <br />a desire for consideration of a fishery in connection with the formu- <br />lation and development of improvements for flood control at Las Animas. <br />Such a fac i I ity wou Id supplement the I imited recreational opportunities <br />prov i ded by Lake Hasty, a sma II art i f ic i a I lake located in the channe I <br />of the Arkansas River immediately downstream from John Martin Dam. <br /> <br />80. SOLUTION TO THE PROBLEM.- In the analysis of the flood and <br />related water problems at Las Animas, it was assumed that the authorized <br />multipurpose Pueblo Reservoir wi I I regulate floodflows and thereby <br />reduce the frequency of flooding at Las Animas; however, the proba- <br />bi I ity of occurrence of large magnitude floods on the Arkansas River <br />from the intervening area below Pueblo, as shown in table 2, indicates <br />that there is a serious flood threat at Las AnImas. The Las Animas <br />local protection features of the major drainage and flood control plan <br />included in the comprehensive basin plan for development of the water <br />resources of the Arkansas River Basin consist of a right bank levee <br />joined to high ground above and below the area to be protected, flood- <br />way clearing in the vicinity of the highway and rai Iroad bridges, <br />floodway widening in certain locations where the floodway is con- <br />stricted by ridges of land protruding from the left bank, and a short <br />levee on the left bank to prevent inundation of Colorado State High- <br />way 194 and U.S. Highway 50. These features of the project could be <br />constructed independent I y of theovera I I bas i n p I an without a Iter i ng <br /> <br />26 <br />