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<br />Executive Summary <br /> <br />Reservoir was drawn down each year due to hydropower operations in an amount of <br />approximately 7,000 af. Under 2015 demand conditions the storage in Stagecoach was used <br />infrequentl y . <br /> <br />In the long-term demand scenario (2040) that includes the enlargement of Stagecoach <br />Reservoir, Stagecoach was drawn down an average of 7,365 afper year as additional releases <br />were made out of its enlargement pool. The average drawdown of Elkhead Reservoir in this <br />scenario was approximately 17,000 af. <br /> <br />Instream Flow Conditions at Juniper Canyon <br /> <br />Table S-9 shows the modeled average monthly flows (cfs) in Juniper Canyon under the <br />No Action, 2015 and 2040 demand conditions. Minimum flow conditions typically occurred in <br />the months of September through February. <br /> <br />Table 8-9 <br /> <br />Average Modeled Juniper Canyon Flows (ers) <br /> <br />October <br />November <br />December <br />January <br />February <br />March <br />April <br />May <br />June <br />July <br />August <br />September <br /> <br />No Action <br />2015 2040 <br /> <br />329 <br />306 <br />253 <br />234 <br />277 <br />603 <br />2,501 <br />5,537 <br />4,794 <br />1,102 <br />276 <br />191 <br /> <br />With Phased Enlargements <br />2015 2040 <br /> <br />321 <br />279 <br />226 <br />206 <br />246 <br />572 <br />2,460 <br />5,484 <br />4,732 <br />1,032 <br />221 <br />181 <br /> <br />325 <br />308 <br />255 <br />236 <br />278 <br />595 <br />2,368 <br />5,515 <br />4,799 <br />1,134 <br />323 <br />243 <br /> <br />272 <br />275 <br />233 <br />212 <br />250 <br />567 <br />2,304 <br />5,400 <br />4,736 <br />1,106 <br />296 <br />175 <br /> <br />Recovery Program Integration and Recommended Flows <br /> <br />An important criteria in evaluating near-term and long-term water development projects <br />in the Yampa Basin was the effect of future development on streamflows in the Yampa River at <br />Deerlodge Park. While transfer of a portion of the Juniper Project water rights to instream <br />flow purposes at Juniper Canyon may be an important step towards protecting the habitat needs <br />of the endangered fishes, depletions associated with future water uses were evaluated to assess <br />their effects on the hydro graph of the river. <br /> <br />A review of the future basin demands used to establish the interim flow <br />recommendations suggested that the interim flow recommendations were based on a demand <br />horizon which falls somewhere between the years 2015 and 2040. For this reason it was <br />deemed more logical to focus on comparisons between flows predicted under near- and long- <br />term projects and the No Action alternative, rather than the interim flow recommendations. <br />This comparison is provided in Table S-9, which suggest that the effects of enlarging and <br />operating E1khead and Stagecoach Reservoirs will be to slightly reduce Juniper Canyon flows <br />during the early runoff period and to slightly increase flows in the remainder of the year. <br /> <br />$-31 <br />