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TABLE 9 <br />MONTH IFR MAXIMUM MINIMUM TARGET EVAP <br /> CFS CAPACITY CAPACITY CAPACITY INCHES <br />1 200-300 19 12 17.5 .0 <br />2 200-300 19 12 17.5 .0 <br />3 200-300 19 12 17.5 .0 <br />4 200-300 19 12 17.5 1.2 <br />5 200-300 19 12 17.5 1.2 <br />6 200-300 19 12 17.5 2.5 <br />7 200-300 19 12 17.5 2.5 <br />8 200-300 19 12 17.5 1.2 <br />9 200-300 19 12 17.5 1.2 <br />10 200-300 19 12 17.5 .0 <br />11 200-300 19 12 17.5 .0 <br />12 200-300 19 12 17.5 .0 <br />Below Crystal Reservoir, a station was added to the network to <br />simulate the operation of the Gunnison Tunnel and to model the <br />instream flow releases from the Unit. The inflow to this station <br />reflects the releases from Crystal Reservoir, and the outflow <br />represents the flow in the canyon below the Gunnison Tunnel <br />diversion. At this location, two diversions are made through the <br />Gunnison Tunnel and into the Uncompahgre drainage. These <br />diversions include the historical Gunnison Tunnel agricultural <br />demand and a junior power demand. During calibration of the <br />model, the return flows from the demands were scaled up and down <br />to match the historic flow of the Uncompahgre River at Delta, <br />Colorado. <br />The instream flow requirement below the Gunnison Tunnel is also <br />modeled at this location. The basic 200 cfs demand can be scaled <br />up to 300 cfs under less conservative scenarios to simulate <br />proposed changes in the operation of the Unit. <br />The next station in the network represents the headwaters of the <br />Uncompahgre River. The flows for this station were derived from a <br />CRSS gains table entitled "gains above Grand Junction on the <br />Gunnison River". Upon checking with the Bureau, this table was <br />found to include both Uncompahgre and the North Fork of the <br />Gunnison River flows. The North Fork was then quantified by <br />summing the gage below Crystal Reservoir and the Uncompahgre at <br />Delta, and then subtracting the result from the Whitewater gage <br />near Grand Junction. The CRSS table was then removed and a table <br />which represents the flow of the Uncompahgre River at Delta was <br />incorporated into the model. <br />11 <br />