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<br />....j. <br /> <br />.002456 <br /> <br />As one of the tenns of Tri-State's Water Management Plan, the Service and Tri-State agreed that <br />the Water Management Plan would tenninate after the Recovery Program acquired and legally <br />protected water in the Yampa River Basin sufficient to protect August through October target <br />flows from depletions, including those of Craig Station Unit 3, Flow recommendations adopted <br />by the Service in 1999 (Modde et al. 1999) are considered to supercede target flows specified in <br />Tri-State's Water Management Plan. The augmentation proposal in this document (see Proposed <br />Action for Base-flow Augmentation on page 75) is intended to satisfy these revised flow <br />recommendations. Although CRDSS accounted for Tri-State's depletions, it did not account for <br />these bypass flows for Craig Station Unit 3. Therefore, the estimated volume of water needed to <br />augment instream flows to satisfy the Service's flow recommendations (see Quantification of <br />Augmentation Needs on page 36) is considered sufficient to cover the 1,000 AF of water Tri-State <br />agreed to bypass, However, before Tri-State can be relieved of its obligation to bypass flows under <br />the 1980 biological opinion, water for augmentation must be decreed for instream flow purposes <br />,(see Water Ril!hts Administration on page 29). <br /> <br />Based on projections of growth in human demand through 2045, the CRDSS estimates average <br />annual future depletions from the Yampa River and its tributaries of about 155.375 AF per year in <br />Colorado (Table 6), an increase of about 30, I 04 AF over current Colorado depletions. This estimate <br />assumes there is sufficient water supply available to meet anticipated future demands regardless of <br />current (i.e" I 998) supplies and legaVinstitutional constraints, <br /> <br />Table 6. Current and future depletions from the Yampa Basin in Colorado by sector <br /> <br /> Current I AF Future (2045) average annual AF of depletions Unlimited <br /> Sector of depletions Limited' Unlimited 3 Shortage · minus Curren <br /> !Agriculture 87,765 87,755 92,258 4,503 4,493 <br /> M&I 5,201 15,100 15,307 207 10,106 <br /> Power 16,947 32,350 32,350 0 15,403 <br /> Exports 2,815 2,814 2,917 103 102 <br /> Evaporation 12,543 12,543 12,543 0 0 <br />I TOTALS I 125,271 I 150,562 I 155,375 I 4,813 I 30,104 I <br /> <br />I Based on estimated demands as of 1998, limited by supplies and legal constraints (Table 5), <br />'Limited by 1998 supplies and legal constraints; agriculture affected by senior M&I and power. <br />J Not limited by 1998 supplies and legal constraints. <br />4 Shortage = Unlimited minus Limited depletions. <br /> <br />The CRDSS also provides a geographic and temporal distribution of estimated current and future <br />depletions from the Yampa River Basin (Table 7). The CRDSS distribution of depletions does not <br />include the estimated 4,8 I 3-AF shortages in Colorado. However, these shortages would likely occur <br />in Water District 58 (Upper Yampa Basin) and WD 44 (Lower Yampa Basin), which account for <br />roughly two-thirds of agricultural consumption in the Yampa Basin in Colorado (Figure 6, Table 8). <br /> <br />Management Plan for Endangered Fishes in the Yampa River Basin <br /> <br />20 <br />