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In addition to the aforementioned releases, there are now two additional release requirements. The first <br /> is a flow commitment associated with the Colorado River Endangered Species Program (aka 10825). <br /> Under this program Northern Water and other front-range trans-mountain diverters agree to make <br /> 5,412 acre-ft of releases from Lake Granby during the months August through October. These flow <br /> additions bring the August and September releases up to a total of 75 cfs at Granby Dam. Additionally, <br /> a portion of the Windy Gap releases to Grand County for the months of August and September were <br /> included. The daily flow duration curve for 1954 through 2009 is shown in Figure 2. A head duration <br /> curve based upon Lake Granby Reservoir levels is also provided in Figure 3. <br /> 120 - <br /> no —Historic <br /> 100 w/10825 <br /> w/GC <br /> 90 <br /> 80 <br /> 70 <br /> 3 60 <br /> LL 50 <br /> 40 <br /> 30 <br /> 20 <br /> 10 <br /> 0 <br /> 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 <br /> Exceedence <br /> Figure 2—Flow Duration Curve for Granby Dam <br /> 240 <br /> 230 <br /> 220 <br /> 210 <br /> 200 <br /> 190 <br /> 180 <br /> v 170 — <br /> ca <br /> = 160 <br /> 150 <br /> 140 <br /> 130 <br /> 120 — <br /> 110 <br /> 100 <br /> 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 <br /> Exceedence <br /> Figure 3 -Head Duration Curve <br /> 4 <br />