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<br />For example, mean monthly flows in August, September or October of the wettest (high <br />snowpack) years should average at least 1,630 cfs. This flow recommendation should be met or <br />exceeded in 5 of every 20 years, or 25 percent of the time. Since the flow recommendations for <br />above average years are also for 1,630 cfs at the rate of25 percent, a mean monthly flow of <br />1,630 cfs should be met in 10 of every 20 years, or 50 percent of the time. During dry years <br />(low snowpack), mean monthly flows should be at least 810 cfs, and this minimum should occur <br />at a rate of no more than 4 in 20 years (20 percent). <br /> <br />River Calls <br /> <br />Dry conditions in early spring resulted in the junior Shoshone Power Plant call for 158 cfs being <br />placed on March 30, 1999, and the senior 1,250 cfs call was placed on April 12. The Shoshone <br />call went totally off on April 21. Subsequently, late spring snows and summer precipitation kept <br />the Shoshone call off for the remainder of 1999. No calls were received for the water rights <br />collectively referred to as the Cameo rights. <br /> <br />Reservoir Releases <br /> <br />A total of77,060 acre-feet of water (after transit losses) was delivered to the 15 Mile Reach from <br />seven reservoirs during the augmentation period from September I through November 2, 1999. <br />Details follow on the operations of the individual reservoirs. Table I shows daily releases from <br />each reservoir and Table 2 provides summary operation statistics for each reservoir, including <br />total storage capacity and volumes released to benefit flows in the 15 Mile Reach. <br /> <br />Green Mountain Reservoir HUP: As of July 14, Green Mountain Reservoir had filled, <br />and HUP storage content totaled 66,000 acre-feet. By the end of August, no releases had been <br />needed to satisfy the water rights of the HUP beneficiaries, and a surplus storage condition was <br />evident. A total of35,566 acre-feet of surplus HUP water was released from September I <br />through November 2 (see Figure I). At the end of the irrigation season, 30,434 acre-feet <br />remained in storage in the HUP. No releases were needed for the west slope HUP beneficiaries <br />at any time in 1999, An agreement was in place to deliver surplus HUP water to the Grand <br />Valley Power Plant and a draft agreement to deliver surplus HUP water in excess of the power <br />plant capacity to municipal recreational uses was being prepared. <br /> <br />Ruedi Reservoir: Releases from the fish pools began on September I and continued for <br />63 days, ending on November 2. Of the total 31,650 acre-feet dedicated for endangered fish <br />from the regulatory pool ofRuedi Reservoir, 20,401 acre-feet was needed for the endangered <br />fish, leaving 11,249 acre-feet at the end of the season. <br /> <br />Wolford Mountain Reservoir: The 6,000 acre-feet of storage space provided for the <br />endangered fish per the Wolford Mountain Reservoir Biological Opinions filled in 1999 and the <br />water was available for the endangered fish. Releases from the fish pool began on October II <br />and continued for 21 days, ending on October 31. Of the 6,000 acre-feet available, 4,939 acre- <br />feet was needed for the endangered fish, leaving 1,061 acre-feet at the end of the irrigation <br />season. <br /> <br />1999 Late Summer/Fall Operations <br /> <br />HUP Managing Entities & Water Managers <br /> <br />- 3 - <br />