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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />14913 <br /> <br />river. Map studies using the published USGS l:24,000-scale <br /> <br /> <br />topographic maps were made to locate possible sites for a reservoir <br /> <br /> <br />having a live capacity of approximately 6,000 AF on the Mancos River <br /> <br /> <br />and its tributaries upstream of the confluence with Navajo Canyon. <br /> <br /> <br />Preliminary comparisons were made of eleven locations, four on the <br /> <br /> <br />main channel and seven on side canyons. Reservoirs on side canyons <br /> <br /> <br />would be suppl ied by pumping water f rom the mainstem or, in one case, <br /> <br /> <br />by a gravity feeder canal. <br /> <br />Potential locations were not intentionally restricted to sites <br /> <br /> <br />within the Ute Mountain Ute Reservation. However, no practicable <br /> <br /> <br />sites were found upstream of the confluence of Weber Canyon at the <br /> <br /> <br />north boundary of the reservation. It is believed that <br /> <br /> <br />environmental constraints would be a major consideration in the <br /> <br /> <br />construction of any reservoir in this area. However, the only <br /> <br /> <br />environmental constraints considered at this preliminary stage <br /> <br /> <br />were: <br /> <br /> <br />o Reservoir sites which would inundate cliff dwellings or Indian <br /> <br /> <br />ruins shown on the published maps were avoided, and <br /> <br />o Sites which would encroach on Mesa Verde National Park were not <br />considered. <br /> <br />Based on judgement and using the comparative statistics. of dam <br /> <br /> <br />height, crest length, pump station lift, pump line length, and canal <br /> <br /> <br />length, three locations were selected as representative of potential <br /> <br />21 <br />