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Last modified
8/16/2009 2:51:27 PM
Creation date
10/4/2006 6:39:54 AM
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Board Meetings
Board Meeting Date
7/23/2002
Description
Flood Section - Chatfield Drought Decloration
Board Meetings - Doc Type
Memo
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<br />.' <br /> <br />The plan contains no specific information about Chatfield and when Denver Water will ask the Board for a Drought <br />Declaration and allow the pool to be drawn down. Denver Water has, however, provided some elevation information it <br />would like us to consider in making a declaration decision: <br /> <br /> <br />Elevation <br />5421.41 <br />5414.63 <br />5 401.23 <br /> <br />Total Reservoir Stora e Reduction <br />1 600 AF <br />6 400 AF <br />14400 AF <br /> <br />. <br /> <br />We have been consulting with the Corps of Engineers, Denver Water, and State Parks regarding the operations below <br />elevation 5432.0. The State Engineer Office in cooperation with the Corps set the release levels at for the conservation <br />pool below elevation 5432.0. <br /> <br />We agree as a result of this consultation that Denver's drought plan applies to all its reservoirs. Thus, if the average <br />level of storage of all Denver's reservoirs is less than 40 percent, they are in a severe drought and Chatfield should be <br />used for water supply regardless of the impacts to the recreational activities at Chatfield Reservoir. <br /> <br />However, Denver has not yet declared that it is in a "severe" drOl.jght at all its reservoirs, but it is approaching a severe <br />drought with respect to the current water level in Chatfield. The qurrent water level is 5429.53 on July 15,2002. When <br />the elevation drops below 5417.0, the State will begin incurring additional operational costs for pumping irrigation <br />water into the Last Chance Ditch. <br /> <br />th <br /> <br /> Denver Water's Reservoir levels Dosted on website as of Julv 14 <br />South Iuflow (cfs) Outflow Elevation Storage Full Elev. Capacity storage I capacity <br />Platte (cfs) (feet) (acre feet) (feet) (acre feet) (%full) <br />Svstem . <br />Antero -19 2 8941.13 18400 . 8942 20015 92% <br />II-Mile 98 98 8597.61 99 864 8597 97 779 102% <br />Cheesman 96 371 6760.49 25921 . 6842 79 064 33% <br />Stronti. 706 225 5992.91 6,962 6002 7,863 88% <br />Sorin.s <br />Marston 175 91 5534.65 17,685 5538 19,796 89% <br /> South Platte'svstem aw. 75.19% <br /> <br />. <br /> <br />Moffat Inflow (cfs) Outflow Elevation Storage Full Elev. Capacity storage I capacity <br />System (cfs) (feet) (acre feet) (feet) (acre feet) (%fall) <br />Gross 64 I15 7215.98 20 065 7282 418I1 48% <br />Ralston 0 0 6046.1 0 9890 6046 10,749 92% <br /> Moffat s stem av . 56.99% <br />Western Inflow (cfs) Outt1ow Elevation Storage 'Full Elev. Capacity Storage I capacity <br />slope (cfs) (feet) (acre feet) (feet) (acre feet) (%full) <br />Dillon 98 50 8987.48 172 757 9017 254 036 68% <br />Williams 8 100 7772.49 48,106 78 II 96,822 50% <br />Fork <br /> Western 810 e av . 62.94% <br /> 66.83 % <br /> <br /> <br />Action . <br />The decisions you must make are 1) whether to make a Drbught Declaration given current conditions? And . <br />2) should a Drought Declaration be for 2002 only? <br />
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