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I I I I I I I I I I I I I I I I I I I Lake Canal Historic Diversions 20,000 8,000 18,000 16,000 14,000 u. 12,000. <( .5 10,000 6,000 4,000 2,000 o !:I ,,'), .'" "co ,}b !:I ~ -'" ,.!Q .... A<:> A'), At. ACO A'll !:I ~ -'" !O .... !:I n. .'" !O !b .<'> n. ~<j w <1>"" q;~ "'~ <1>'0 ~CO <1>'Cf <1>V <1>'Cf" <1>' <1>' <1>' <1>' <1>' ~qJ <1>'0 <1>'Cf ~qJ <1>"" ~'ll ~<1> ~... ~'ll ~'ll ~"'- ~<:> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~J ~ ~ ~ 'v Year Figure 3. Historic annual Lake Canal diversions from the Poudre River. lake Canal Reservoir Company Water Riahts Lake Canal Reservoir Company operates a system of four reservoirs. North Gray Reservoir, South Gray Reservoir, and Gray Reservoir #3 are above the Lake Canal service area and have decreed storage capacities of 285 AF, 885 AF, and 110 AF respectively. Water from these three reservoirs is released to Boxelder Creek and then redirected into Lake Canal. The fourth reservoir, Lake Canal Reservoir #1, is located within the Lake Canal service area and has a decreed storage capacity of 800 AF. The total decreed storage capacity of these reservoirs is 2,080 AF per year. The total number of outstanding shares is 160, so the annual historic yield based on decreed capacity could be upwards of 13 acre feet per share. This estimate of yield is likely generous because it is based on reservoir capacity prior to reservoir siltation, which has occurred gradually over many years. A more realistic estimate of useful storage is probably closer to 1,280 AF or 8 acre feet per share; however 2,080 AF still represents the potential storage in these reservoirs if accumulated sediments are removed. Cache la Poudre Reservoir Company (aka Timnath Reservoir) Water Riahts Lake Canal shareholders own 370 to 375 shares of Cache la Poudre Reservoir Company stock which has an average annual yield of approximately 3 acre feet per Aqua Engineering, Inc. June 7, 2004 Canal Modernization Feasibility Study -4-