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C150221 Water Potential Report
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C150221 Water Potential Report
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Last modified
6/12/2014 4:51:05 PM
Creation date
2/19/2014 3:15:10 PM
Metadata
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Template:
Loan Projects
Contract/PO #
C150221
Contractor Name
San Luis Valley Irrigation District
Contract Type
Grant
Water District
20
County
Hinsdale
Loan Projects - Doc Type
Report
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Mr. Travis Smith, Superintendent <br /> October 16, 2003 <br /> Page 10 <br /> canal and native flow at the Del Norte gaging station. Specifically, the additional water was that <br /> diverted into the canal at rates of more than 145.70 cfs when the flow at Del Norte was larger <br /> than 2,285 cfs. Table 6 shows the results from this part of the analysis. Additional water was <br /> available for direct flow storage under the District's decree in most years of the analysis period. <br /> It averaged 15,005 acre-feet annually overall and ranged from none in 2002 to 40,288 acre-feet <br /> in 1980. Most of the water was available in May and June, although some was available in April, <br /> July, and August. <br /> We understand that direct flow storage under Priorities No. 1903-30F and 1903-34G is <br /> particularly important to the District. Water normally becomes available under these priorities <br /> early in the irrigation season before the District has cleaned the Farmers Union Canal at <br /> diversion rates greater than 531.58 cfs. As a result, the District expends a great deal of effort to <br /> divert and deliver this water to its landowners. Having additional reservoir capacity available in <br /> which to store this direct flow water would give the District more opportunity to clean the ditch <br /> and would increase efficiency with which the water could be delivered to the landowners for <br /> direct irrigation and recharge. Table 7 shows the direct flow water that was available for storage <br /> under these two priorities. It averaged 1,542 acre-feet annually and ranged from none in 23 <br /> years to 12,470 acre-feet in 1979. This is water measured at the Farmers Union diversion <br /> facilities so it includes no allowances for conveyance losses. <br /> As indicated above, the direct flow storage rights held by the Rio Grande Canal Water <br /> Users Association and the Commonwealth Irrigation Company were decreed respectively in <br /> Cases No. W-3979 and 95CW18. As you know, the Rio Grande Canal Water Users Association <br /> owns and operates the Rio Grande Canal, and the Commonwealth Irrigation Company owns <br /> and operates the Empire Canal. The decree in Case No. W-3979 allows the Rio Grande Canal <br /> Water Users to store the direct flow water available under the priorities junior to Priority No. 363- <br /> A when Priority No. 363-A can be fully satisfied from the available river flow. When Priority No. <br /> 363-A is fully satisfied, the Rio Grande Canal is entitled to divert 570 cfs. <br /> The decree in Case No. 95CW18 allows the Commonwealth Irrigation Company to <br /> implement direct flow storage under Priorities No. 361-A and 361-B when the indexed native <br /> flow in the Rio Grande at the Del Norte gaging station exceeds 2,285 cfs. The decree in Case <br /> No. 95CW18 further limits the Commonwealth's direct flow storage to May 20 to July 5, to <br /> periods when Priorities No. 361-A and 361-B are fully in priority and to periods when all the <br /> Empire Canal priorities can be used beneficially within the Company's service area. Also, the <br />
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