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<br />The operating plan provides for the Willow Creek pumps to operate
<br />during November and transfer nearly 1,900 acre-feet of water to Lake
<br />Granby. Thereafter, the pumps and canal will be winterized, Winter
<br />inflows will be stored with releases to the river limited to 7 ft3/s
<br />or inflow in accordance with the 1961 Secretarial Determination.
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<br />Storage in Lake Granby of 226,200 acre-feet at the end of Water Year
<br />1977 was only 54 percent of normal. The carryover storage in Carter
<br />Lake of 20,900 acre-feet and Horsetooth Reservoir of 10,300 acre-feet
<br />were also significantly below normal. The low carryover storage
<br />in Lake Granby will limit transmountain diversions through Adams
<br />Tunnel to about 98,000 acre-feet during the October-January period.
<br />Of this amount, 56,400 acre-feet (58 percent) will be pumped to Carter
<br />Lake. By the end of January, the combined storage in Carter Lake
<br />and Horsetooth Reservoir will be nearly 98,300 acre-feet.
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<br />The carryover storage in major reservoirs in the North Platte
<br />Basin area totaled 1,153,700 acre-feet on September 30, 1977.
<br />was 90 percent of the a 10-year average and 517,000 acre-feet
<br />than last year.
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<br />Seminoe Reservoir storage of 604,200 acre-feet at the beginning of
<br />the water year was 91 percent of the recent 10-year average. Total
<br />turbine releases will lower the reservoir storage to about 360,500
<br />acre-feet by January 31. Monthly average turbine releases will
<br />vary from 1,000-1,400 ft3/s as required to meet system power loads.
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<br />At the beginning of Water Year 1978, Pathfinder Reservoir storage
<br />was only 71 percent of normal or 249,500 acre-feet. Fremont Canyon
<br />Powerplant releases will be reduced during October in order to lower
<br />Alcova Reservoir's water surface below the bottom of the gates to the
<br />Casper Canal. The low winter operating level will prevent ice damage
<br />to the Casper Canal gates. After November, releases from Pathfinder
<br />and Alcova Reservoirs will be made to meet the required Gray Reef
<br />Reservoir release and maintain the winter operating level in Alcova
<br />Reservoir. Pathfinder Reservoir will fill to about 380,000 acre-feet
<br />by the end of January.
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