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<br />Water Supply Reserve Account - Grant Application Form <br /> <br />Form Revised October 2006 <br /> <br />7. <br /> <br />Water Availability and Sustainability - this information is needed to assess the viability and <br />effectiveness of the water project or activity. Please provide a description of each water supply <br />source to be utilized for, or the water body to be affected by, the water activity. For water supply <br />sources being utilized, describe its location, yield, extent of development, and water right status. For <br />water bodies being affected, describe its location, extent of development, and the expected effect of <br />the water activity on the water body, in either case, the analysis should take into consideration a <br />reasonable range of hydrologic variation. Attach additional sheets as needed. <br /> <br />The project as originally proposed involved raising the lake level three feet above the <br />CWCB natural lake level of 8,995 feet. <br /> <br />Beginning in the 1950's, Hinsdale County Road and Bridge Department crews <br />constructed a rock and timber dam at the outlet of Lake San Cristobal that raised the <br />water level in the lake above its natural level. The 2003 feasibility study established that <br />the natural lake level is, in fact, approximately 8,990 feet and the dam raised the level to <br />approximately 8,992.5 feet. Thus, storage has been historically occurring above the <br />natural lake level, and the improved structure can impound the proposed 960 acre-feet <br />without inundation of additional wetlands. <br /> <br />It was apparent that while the increase in lake level could be pursued, it would be cost <br />prohibitive, primarily due to inundation of the wetlands. Consequently, the CWCS <br />natural lake level water right was examined. It was determined that CWCB used <br />inaccurate methods to determine a historical natural lake level when it obtained its water <br />right. The inaccuracy of such methods provides the basis for modification of the CWCB <br />natural lake level water right under Rule 9c (1) of the Rules Concerning the Colorado <br />Instream Flow and Natural Lake Level Program. <br /> <br />8. If you have not specifically and fully addressed the Evaluation Criteria found in Part 3 of the criteria <br />and guidance document please provide additional detail here. Attach additional sheet(s) ifneeded. <br /> <br />Not applicable <br /> <br />R <br />