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<br />MULTIRESERVOIR-FLOW MODEL
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<br />A majority of the control-point locations are shown in figure 6, and all
<br />proposed reservoirs that were used in the multireservoir-flow model are shown in
<br />figure 1. The transmountain diversions also are shown in figure 1. The proposed
<br />Vidler transmountain diversion will obtain water from six tributaries of the Yampa
<br />River and from the Yampa River upstream from Steamboat Springs (table 4). The
<br />proposed addition to the existing Hog Park transmountain diversion will obtain
<br />water from tributaries of the Little Snake River. For the model analysis, control
<br />point 39 represents the entire Vidler transmountain diversion for the six upstream
<br />tributaries and Yampa River (table 4), and control point 46 represents the entire
<br />Hog Park transmountain diversion. Proposed annual diversions are 132,000 acre-
<br />feet (163 hm3) for the Vidler project and 31,000 acre-feet (38.3 hm3), which is an
<br />addition of 23,000 acre-feet (28.4 hm3) to the present diversion of 8,000 acre-
<br />feet (9.9 hm3) for the Hog Park project (Banner & Associates, Inc., 1976; U.S.
<br />Department of Agriculture, 1981). These proposed annual diversions were converted
<br />to monthiy flows for use in the model (table 5). The distributions were assumed
<br />because of the relatively greater streamflows during the spring snowmelt period.
<br />
<br />Table 4.--Proposed souroes of water for the Vidler transmountain diversion
<br />
<br />Fish and Walton Creeks---------------
<br />Harrison Creek-----------------------
<br />Morrison Creek-----------------------
<br />Service Creek------------------------
<br />S i 1 ver Creek-----------n-----uun-
<br />Yampa River--------------------------
<br />
<br />39
<br />5
<br />40
<br />36
<br />19
<br />44
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<br />[Robert Moreland, Vidler Tunnel Corp., oral commun., 1977J
<br />
<br />Stream
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<br />Maximum
<br />annual
<br />diversion
<br />(ac re- feet)
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<br />28,000
<br />3,500
<br />29,000
<br />26,000
<br />13,500
<br />32,000
<br />
<br />Average
<br />flow rate
<br />(cubic feet
<br />per second)
<br />
<br />TOTAL---------------------------
<br />
<br />132,000
<br />
<br />183
<br />
<br />The proposed reservoirs in the basin have a number of different purposes
<br />(Steele and others, 1979). For many of the reservoirs, multiple uses are proposed
<br />with certain amounts of storage allotted for each use. For the multireservoir-
<br />modeling analysis, it was assumed that all usable storages (conservation pool to
<br />dead storages) wou I d be ava 11 ab I e for use each yea r. For many of the reservo i rs ,
<br />the amount of water to be alloted for each water use could only be estimated.
<br />Approximate water uses for some of the proposed reservoirs are shown in table 6.
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