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<br />Feasibility Study <br />Upper Arkansas Water Conservancy District <br />North Fork Reservoir Rehabilitation and Expansion Project <br /> <br />Introduction <br /> <br />North Fork Reservoir, located at the headwaters of the North Fork of the South <br />Arkansas River, was constructed in 1953. It was originally operated as a supplement for <br />irrigation water in the South Arkansas River. Since 1979 it has been operated by the <br />Upper Arkansas Water Conservancy District for domestic, municipal, industrial, <br />recreational and augmentation water supply. The outlet gate has begun to fail and cannot <br />be reseated thereby causing leakage of water from the reservoir through the partially <br />opened gate. In 1999 a video of the outlet pipe showed significant rusting of the pipe <br />walls and a review by Mr. Stephen Spann, P.E. recommended that the pipe was reaching <br />its expected life cycle and would soon need replacement. A hydrology study and <br />reservoir routing capacity study have shown that the existing spillway requires <br />enlargement. There is also seepage along the right abutment, which should be mitigated <br />with a sand filter cover to prevent future piping ofthe embankment or abutment soils. <br />The demand for water storage has increased with population growth over the past 10 <br />years along the South Arkansas River corridor as well as within the entire Upper <br />Arkansas Valley. The Upper Arkansas Water Conservancy District's Water Activity <br />Enterprise desires to rehabilitate and expand the reservoir. <br /> <br />Project Sponsor <br /> <br />The Upper Arkansas Water Conservancy District operates as a water conservancy <br />district pursuant to Article 45, CRS (decrees are attached as Appendix A). The District <br />serves to protect and develop water supplies in Chaffee, Western Fremont and Custer <br />Counties. <br /> <br />Project Service Area and Facilities <br /> <br />Through its "blanket augmentation plan" the District's Enterprise replaces <br />depletions from commercial and domestic wells, and on-stream pond and reservoir <br />evaporation to its surrounding streams. It serves a population base of approximately <br />20,000 people. Revenue from the augmentation plan is used to develop water supplies <br />and storage. The District operates five reservoirs and owns Twin Lakes Canal Company <br />water shares, Fryingpan-Arkansas water and native water supplies. A brochure showing <br />the service area is enclosed. <br /> <br />Hvdrolo2V and Water Ri1!hts <br /> <br />A chart showing a summary of water and water storage is attached as <br />Appendix B. The District has several decrees for augmentation in cases numbered <br />92CW84, 94CW5, 94CW41, 94CW42, and 96CW17. Storage rights include decrees of <br />82CW204 and 84CW141. Copies of the decrees are included in Appendix C. <br />uawcd Feasibility Study Rev.doc Page 5 of9 <br />