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<br />,,- Average Annual Depletions Above Sioux City
<br /> 1949-1970
<br /> Estimated
<br /> Depletion
<br /> State 1,000 A.F.
<br /> ~Iontana 727,000
<br /> I~yoming 219,000
<br /> North Dakota 138,000
<br /> South Dakota 447,000
<br /> Nebraska 96,000
<br /> Subtotal for Users 1,627,000
<br /> Mainstem reservoir
<br /> evaporation 1,145,000 y
<br /> Total estimated 'for
<br /> 1949-1970 period 2,772 ,000
<br />
<br />Y Excludes evaporation from Fort Peck Reservoir, which began operation
<br />prior to 1949.
<br />
<br />Of the 1,627,000 acre-feet of water depleted bet\~een 1949 and 1970 for
<br />water user activities, 920,000 I~ere associated with irrigation farming and
<br />300,000 as a result of Hatershed treatmcnt and stockponds. About 275,000
<br />acre-feet were lost to evaporation in tributary reservoirs and minor
<br />depletions by municipal use, mining, thermal pOHer, and rural domestic use
<br />consumed the remainder. Additional infor,mation regarding more specific
<br />location of the 1949-1970 depletions are contained in Exhibit 2.
<br />
<br />A comparison of 1949 and 1970 \~ater quantities is shoHn in the table I~hich
<br />follows:
<br />
<br />Point of
<br />Reference
<br />or River Reach
<br />
<br />Average Annual F10\~s fi Depletions
<br />F10Hs At 1949 Depletions Between Flows at 1970
<br />Level of 1949 and 1970 Level of Develpmt
<br />Development 1898-1972
<br />1898-1972 Incremental Curn1atv
<br />
<br />Above Ft Peck Darn 465,000
<br />Missouri R. at Ft Peck Dam 7,303,000 465,000 6,838,000
<br />Between Ft Peck & Williston 120,000
<br />Missouri R. at Hont-N.D. Line 7,258,000
<br />Above Williston 361,000
<br />Yellowstone R. at Sidney ,~[ont. 8,800,000
<br />Total above Williston (946,000)
<br />Missouri R. at l~il1iston,N.D. 16,058,000
<br />Between \~il1is. & Garris. Dam 627,000
<br />Between Ft Peck & Garris. Dam 1,108,000
<br />Hissouri River at Garris. Dam 18,525,000 1,573,000 16,952,000
<br />Betl<ccn Garrison & Oahe 705,000
<br />/.Iissouri River at Oahe Dam 20,803,000 2,278,000 18,525,000
<br />BeWeen Oahe & Big Bend 84,000
<br />
<br />2
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