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<br />U.S. Dist. Ct., Hont., copy of which is attached as Appendix No.2.
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<br />a. Existing Plans and Probabilities
<br />
<br />The Hater Supply Group reports that the Hissouri River leaving
<br />
<br />Montana has a 10n~-tiIDe average flow of 7,30U,OOO acre-feet at the 1970
<br />
<br />level of development. Fort Peck Reservoir, on the HisGouri River in
<br />
<br />Hontana, has a storage capacity of 19,100,000 acre-feet.
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<br />A few miles below the Hontana-North Dakota boundary, the }lisGouri
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<br />is joined with the Yellowstone River which adds 8,800,0-0 acre-feet in
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<br />an average year. Their combined, inflow to Garrison Reservoir is
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<br />16,100,OOO acre-feet, and Garrison Reservoir has a capacity of 24,200,000
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<br />acre-feet.
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<br />The }lissouri River is a gaining stream and shoHs increasingly larger
<br />
<br />flm-Is as it progresses do\mstream through Oahe R.eservoir, Big Bend,
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<br />Reservoir, Fort Randall Reservoir, and Gavins Point Reservoir. From
<br />
<br />reservoirs on the river.
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<br />Sioux Ci ty to its Iilouth it doubles its flow, but there arc no other
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<br />A comparison of 1950 and 1970 water quantities is sho'1I1 in the table
<br />
<br />which follows:
<br />
<br />Point of
<br />Reference
<br />or River
<br />Reach
<br />
<br />Flows At
<br />1949
<br />Level of
<br />Development
<br />1898-1972
<br />
<br />Above Fort Peck Dam
<br />Hissouri River at Fort Peck Dam
<br />Bet"een Fort Peck and Hillison
<br />Missouri River at Mont.-No. Dak. Line
<br />Above Hi1liston
<br />Yellowstone River at Sidney, Hontana
<br />Total above Hilliston
<br />Missouri River at Williston, No. Dak.
<br />BetHeen Hilliston and Garrison DaDl
<br />Bet"cen Fort Peck and Garrison Dam
<br />}lissouri River at Garrison Dam
<br />Bet"cen Garrison and Oahe
<br />HisSQUL"i Rivilr at Oahe Dam
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<br />Between Oahe and Big Bend
<br />
<br />7,303,000
<br />
<br />18,525,000
<br />
<br />20,803,000
<br />
<br />8
<br />
<br /> Flows At
<br />Depletions 1970
<br />Bet"een Level of
<br />1949 Development
<br />and 1970 1898-1972
<br />465,000
<br /> 6,83B,OOC
<br />120,000
<br /> 7,258,000
<br />361,000
<br /> 8,800,000
<br />(946,000)
<br /> 16,058,000
<br />627,000
<br />1,108,000
<br /> 16,952,000
<br />705,000
<br /> 18,525,000
<br />84,000
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<br />rl
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