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expected to have an effect on wet-year or average-year results in the Yampa because in most <br />areas of the basin, demands are typically satisfied. <br />Figure 5 <br />Gaged and Simulated Average Streamflow -Wet Year (1984) <br />450000 <br />400000 <br />350000 <br />O <br />,:, 300000 <br />N <br />N <br />w <br />~ 250000 <br />V <br />R <br />?~ 200000 <br />O <br />LL <br />~ 150000 <br />R <br />L <br />~ 100000 <br />a <br />50000 <br />OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br />^Gaged OPrevious CRDSS ^Enhanced <br />1976-1996 Average Diversion Comparison <br />The three diversion structures highlighted in the Previous CRDSS calibration are also discussed <br />here. Based on the StateCU consumptive use analysis results, they represent the range of <br />efficiency patterns seen throughout the basin. In addition, two diversion structures were also <br />included to represent structures that receive a significant amount of supply from a reservoir <br />(Collins Ditch) and to represent aggregate diversion structures (Slater Creek Aggregate <br />Diversion). <br />• 440694 Maybell Canal. This ditch serves a significant amount of acreage, therefore has a <br />large demand. Its water rights, however, are relatively junior and calculated efficiencies <br />vary significantly by month and in dry compared to average and wet years. <br />• 570563 Marshall Roberts Ditch. This ditch has the most senior water rights in the basin, <br />therefore is more able to meet crop demands than other ditches. This is reflected by <br />calculated efficiencies that are generally very low. <br />• 580798 Nickell Ditch. This ditch appears to be very water short and, when water is <br />available for diversion, efficiencies generally are at the 60 percent maximum. <br />• 580591 Collins Ditch. This ditch gets a significant portion of late season demand from <br />Allen Basin Reservoir. During the early season, efficiencies vary considerably. During <br />VariableEff Taskl-5 7 of 17 November 5, 2001 <br />