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<br /> <br />. I <br />lJJ <br />.,. <br />-- <br />-- <br />". <br />,. <br />... <br /> <br />c.J <br /> <br />",...<aI" <br />,\....) <br />(.-:, <br />c:__ <br />c;. <br /> <br />The conveyance channel will be fenced on ~oth sides to prevent livestock <br />damage to the levees and banks. The fence will also prevent livestock <br />from entering the channel, thus reducing the possibility of drownings. <br />A total of 84 miles of 4-strand barbed wire fence (about 4 feet high) <br />will be required. <br /> <br />The soil materials in WhlCh the channel will be constructed consist of <br />stratified clays and sands. The channel will be unlined unless explo- <br />ration data dictates a lined or partially lined channel. Then the <br />channel will be lined with compacted earth, soil cement, or concrete <br />depending on soil characteristics and available lining material. <br />, ~ <br />,-~' . ",-t <br />Annual maintenance consisting of cleaning out windblown sediment and <br />structural repairs will be required on the conveyance channel. Main-, <br />tenance would be accomplished with the least amount of disruption to the <br />system and would begin at the delivery point to the Rio Grande with most <br />of the system being shut down at this time. <br /> <br />... <br /> <br />Water would remain behind each control check structure until the upstream <br />section of channel is next in line for maintenance (spaced 1-5 miles <br />apart); After maintenance is complete, downstream sections would then <br />continue to convey water to the Rio Grande. <br /> <br />It is estimated that a total of 1 to 2 weeks would be required to complete <br />the annual maintenance program. Maintenance of the entire system would <br />be scheduled over a 5-year period and is anticipated to be performed <br />sometime during late spring or early summer. <br /> <br />(7) Conveyance channel fishery--A conveyance channel fishery, <br />may be included as a project feature if two basic criteria are met: <br /> <br />(a) Economic feasibility; and <br /> <br />(b) Participation by a non-Federal entity in cost- <br />sharing and management under the provisions of Public Law 89-72. <br /> <br />The engineering and economic feasibility is currently being investigated <br />by the Colorado Division of Wildlife, the FWS, and the Bureau of Reclamation, <br />If economic feasibility can be demonstrated, an "89-72" sponsor would be <br />sought. <br /> <br />In order to determine economic feasibility, both costs and benefits must <br />be estimated. Drawing No. 1298-500-56 shows a typical proposed fishing <br />access area and conveyance channel cross-section which are the basis for <br />current cost estimates. Drawing No. 1298-500-54 shows the locations of <br />the proposed fishing access areas. <br /> <br />A-ll <br />