Laserfiche WebLink
<br />The Bureau could choose to release additional water above the 66.000 AF limit however. it would <br />not be consistent with the current operating policy and this operation could have a negative impact <br />on the remaining contract pool. <br /> <br />1989 ANAL YSIS <br /> <br />Similar to the study year 1977, in 1989 the 66,000 AF pool was exhausted. However this was <br /> <br /> <br />attributed more to the change in administrative practice of the Check than to unusually low <br /> <br /> <br />streamflows. The analysis indicates that had the Check been administered as it had historically, <br /> <br /> <br />53,000 AF less could have been released from Green Mountain Reservoir in this year. Figure 7 <br /> <br /> <br />shows the amount of water available above the Roller Dam as it actually occurred (current <br /> <br /> <br />administration) compared to what would have been adequate flows under historic administration. <br /> <br />Figure 8 displays that even during a moderately dry year such as 1989, the current administration <br /> <br /> <br />exhausts the 66.000 AF by the end of the irrigation season. This occurred, in part, because <br /> <br /> <br />releases from Green Mountain Reservoir began on July 11 tho Under historic administration <br /> <br /> <br />practices, releases would not have been required until early September. The longer release <br /> <br /> <br />schedule together with the increased demand (1950 cfs vs 1700 cfs) at cameo caused the <br /> <br /> <br />additional 53,000 AF of water to be released from Green Mountain. This water would have <br /> <br /> <br />otherwise been available for generation of power during the winter which in turn would help <br /> <br /> <br />augment streamflows in the lower Blue and Colorado Rivers. <br /> <br />1990 ANAL YSIS <br /> <br />In 1990 the 66,000 AF pool was nearly exhausted. Again this occurred only because of current <br /> <br /> <br />administrative practiceS: The analysis indicates that had the Check been administered as it had <br /> <br /> <br />historically, 33.000 AF less could have been released from Green Mountain Reservoir. Figure 9 <br /> <br /> <br />shows the amount of water available above the Roller Dam as it actually occurred (current <br /> <br /> <br />administration) compared to what would have been adequate flows under historic administration. <br /> <br />Figure 10 displays that even during a moderately dry year such as 1990, the current administration <br />nearly exhausts the 66,000 AF by the end of the irrigation season. Historically, Green Mountain <br />Reservoir would have had an additional.33,OOO AF of storage at the end of the season. <br /> <br />16 <br />