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<br />002970
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<br />determine the North Platte Ri vel' channel capacity through Casper. Wyo. This
<br />was done in prepar'ltion for the high releases that would bc required throughout
<br />much of the s<?ason.
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<br />The need to move considerable snowmelt water downstream caused considerable
<br />bypass of the Fremont Canyon Powerplant in April and throughout June and early
<br />July. A total of about 90,000 acre-feet of water was bypassed during the runoff
<br />season.
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<br />Alcova Reservoir was operated at the normal summer operating level from the
<br />latter part of April through the end of September. Delivery of \vater to the
<br />Kendrick project started late in May and continued until late in September.
<br />Total delivery for the season amounted to 57,000 acre-feet which was normal.
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<br />Kendrick project storage water ownership filled to capacity early in June and
<br />remained at nearly 1,150,000 acre-feet at the end of the water year. This was
<br />the maximum carryover of water ownership of record for the project. Carry-
<br />over storage in Pathfinder Reservoir at the end of the water year was the maxi-
<br />mum of record, nearly 790, 000 acre-feet. Carryover storage in Alcova Reservoi r
<br />was normal.
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<br />Gray Reef, Glendo,. and Guernsey Reservoirs
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<br />Carryover storage in Glendo and Guernsey reservoirs was near normal at the
<br />beginning of Water Year 1971. Transfer of water to these reservoirs from the
<br />upper system was in accordance with the normal plan of operation from October
<br />through March. Starting in April, transfer of water was predicated on accom-
<br />modation of reasonable maximum snowmelt runoff along with the maximum river
<br />gains of record below Alcova Reservoir.
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<br />The snowpack tributary to the North Platte River between Alcova and Guernsey
<br />Reservoirs was normal to below normal on April 1. Above normal precipitation
<br />during April produced river gains that were about 300 percent of average. Heavy
<br />snow and rain early in May produced exceptional river gains which were the maxi-
<br />mum of record and nearly 600 percent of average. Peak i nflow to Glendo Reservoir
<br />of nearly 12,000 c. f. s. occurred on May 5. Inflow from river gains remained
<br />high until the middle of June.
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<br />These exceptional river gains were stored in the flood pool of Glen do Reservoir.
<br />With downstream releases limited by high water and flood conditions, Glendo
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