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<br />SUBSTANTIATING MATERIALS <br /> <br />Ten peroent or 310 aores of the extension lands are owned by the <br />Southern Ute Indian Tribe but are located outside the boundaries of the <br />Pine River Indian Irrigation projeot. The remaining lands are all in <br />private, non-Indian ownership. <br /> <br />All but about 860 aores of the extension lands are within the bound- <br />aries of the Pine River Irrigation Distriot whioh was organized to rep~ <br />five-siXths of the reimbursable costs of Vallecito Reservoir. If the <br />Pine River project extension were built, it would be necessary to enlarge <br />the Pine River Irrigation District to include the 860 acres of land not <br />now in the distriot, or it ma::r be necessary to replace the district with <br />a conservancy-type district in order to meet the requirements of the proJ- <br />ect authorizing act. <br /> <br />The extension would be a single-purpose irrigation development and <br />would have only negligibJ,e effeots on fish and wllcllif'e, recreation, and <br />flood control. <br /> <br />Plan forznulation <br /> <br />The lands that oan be served by gravity under the extension of the <br />King Consolidated Canal are limited by a series of low sadclles in the <br />divide between the Pine and Florida River drainages. The arable lands <br />in the extension area rise to-ward the Mesa Mountains to elevations con.. <br />siderably higher than the sadclles in the divide. Studies were made to <br />determine the limiting economic elevation of the Ridge Canal that would <br />siphon aoross these sadclles. <br /> <br />Various plans of pumping to irrigable lands above the adopted <br />gravity system were considered. The high operation, maintenanoe, and <br />repla.cement costs, however, precluded the addition of any pump areas to <br />the project. Possibilities of generating hydroeleotrio power at Vallecito <br />Dam and' at two drops in the Ridge Canal were also studied. None of the <br />plans investigated had suffioient merit under present price relationships <br />to warrant detailed study. <br /> <br />Storage regulation at Valleei to Reservoir is adequate to meet the <br />needs of any municipal and industrial uses that ma::r reasonably develop <br />in the foreseeable future. No practicable and justifiable possibilities <br />exist for including these uses as part of the development plan for the <br />Pine River project extension., <br /> <br />Designs and estimates <br /> <br />General <br /> <br />Preliminary designs and cost estimates of projeot works were made <br />with oareful oonsideration being given to required oonveyance oapaoities, <br /> <br />6 <br />