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<br />mouth of the Grand have been estir.ated at about .:600,000, of which
<br />,;82,000 are in the backwater area of the llississippioo
<br />
<br />3. The plan ef imprOV8Q8nt reeo~nded by the De~rtrnent to Con-
<br />grass in January 1939, and published as H. D. No. 107176/1, \YaS for the
<br />oonstruction of 3 reservoIrs for the production of hydroelectric power
<br />and for flood control.. These 3 reservoirs are the Pensacola, l.:a.rkr.9.In
<br />Ferry and Fort Gibson reservoirs, located at mile 77,46 and 8 respect-
<br />ively, above the riv"3r's mouth. The proposed pl'ln l'1B.S as follo~7s:
<br />
<br />,
<br />
<br />Reservoir
<br />
<br />Po....r
<br />Storage
<br />
<br />Flood
<br />Control
<br />Stora.~e
<br />
<br />Total
<br />Storlle;e
<br />
<br />Installed
<br />Capaci t"J
<br />
<br />Firm
<br />Capacity
<br />
<br />Annua 1
<br />::nergy
<br />Output
<br />
<br />Pensacola 1,140,000 960,000
<br />Markham Ferry 213,000 239,000
<br />Fort Gibson 365;~ 486,000
<br />Total l,718,aXn.6S5,OOO
<br />
<br />2,100,000
<br />452,000
<br />851,069
<br />} ,403 ,000
<br />
<br />6}.000
<br />1jO ,000
<br />1.0 ,000
<br />143.000
<br />
<br />58,000 265,000,000
<br />40,000 160,000,000
<br />40,000 170,000,000
<br />138,000 595.000,000
<br />
<br />The costs ~rere estimated as follo'.7s:
<br />
<br />.
<br />
<br />Reservoir Flood Control Power Total
<br />Pensacola 9,600,000 13,,800,000 23 "f::I:Jo,OOO
<br />l!arkhe.m Ferry 2,500,000 11,800,000 11., }OO. 000
<br />Fort Gi bean 5,000,000 6,700,,000 13,,700 ,000
<br />Total 17,300,,000 }4.}OO,OOO 51.600 .000
<br />
<br />The cost of flood oontrol storage is, therefore, estimated at about JIO
<br />per aCr'e-foot.
<br />
<br />4. The average annual benefits for' the system were estirnated as
<br />fo 110t"13 :
<br />
<br />Flood Control . 91,},ooO
<br />. . . . . . . . . . . ..;
<br />POToe r . . . . . . . . . . 2,466,000
<br />Recreation~ . . . . . . . . . . . . 49,000
<br />Total ;;3,458,000
<br />
<br />The annual charges \~re esti~ted at /2,334.000.
<br />
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<br />5. The Pensacola P.eservoir is now completed. It was constructed
<br />by the Grand River Dam ~.utoority cree..ted by the State of OklaooM. and
<br />is under the provisions of the Federal Po~~r License. This license
<br />provides, among other thing~ that the uppar ten feet of the reservoir
<br />shall be reserved for the control of floods, but the authority shall not
<br />be required to iI:J.pound water above an elevation five feet below crest
<br />until the united States has acquired the necessary flowage rir~ts above
<br />that elevation. In other vrords, the present effective flood control
<br />storage, instead of beint 960,000 acre-feet as recomnended in the re-
<br />porl of the Department, is only 245,000, and My be incroased to I):
<br />total of 540,000 ~~en the United States acquires the lands, easements
<br />and rights-of-../8.Y in the top five feet.
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<br />240J
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