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:. . ) . .' ') . (3/ ~ 6) I') 7 submitted a report to Congress on the Canton Reservoir. The Committee listed 7 reservoirs (Oologah, Nimrod, Blue Wountain. Wister, llannford, Tenkiller Ferry, Canton), est~ated to cost ;52,633,000, and stated that these reservoirs appear most necessary and desirable in the Arkansas River basin. The total capaoity of these 7 as now contemclated 1s 3,305,000 e.ore-feet. . 2. The Nimrod Dam 1s now under OOnBtruction. It ~~ll give immediate protection to the valley below Nimrod, Ark., by oontrolling floods from a drainage area. of 680 square miles. It is beln::; oonstruoted for flood control only, but in suoh manner that by the installation of crest ~te8 it can be converted to power and flood control. It mIl provide a con- servation pool of 30,000 acre-foet and flood control storage of 305,000 acre-feet. An ultimate storage of 640,000 acre-feet is possible. The dam will be a. oonorete gra.vity structure Y7ith a maxim.un height of approximate- ly 100 feet and an estimated cost of about ';4.000,000. The area to be benefited by the reservoir is about 21.300 acres. 3.. The Blue ~untain Dam on the Petit Jean River is also under con- struction. This will be a rolled-fill earth dam providing a flood control storage of 233,000 aore-feet, ~nd a conservation storage of 25,000 acre~ feet. The estimated cost is slightly under ,;5.000,000.. The flood plain of the Petit Jean River below Blue llountain is 43.000 acres. largely devoted to agrioulture. The averace annual loss in the flood plain has ~unted to about ;56,000. The Blue llountain Reservoir will provide an effective oontrol of all floods of record. It would have reduced the 1927 peak at Denville from about 30,000 to about 11,000 c.1'.s. Although it will not fully protect the valley since the lower portion is subject to backwater fro~ the Arkansas River. it vdll naturally reduce the extent of the flooding. 4. The Canton dam site is approximately 80 'l!'dles upstream from Oklaluma City on the North Canadian River. This dam will be placed under construction in the immediate future. It will be an earth fill dam ,71th a length of nearly 3 miles and an average height of about 70 feet. The reservoir will provide a total storage of 390,000 aore-feet, of whioh 10,000 aore-feet is conservation, Lo,ooo will be set aside for pollution abatement storage, 100.000 for silt storage, 2.40.000 for flood control storage. The estimated cost will be about ;12.000,000. The use of storage for pollution abatement was exhaustively studied by the Publio Health Service at the request of the Department. 5. The Wiater reservoir vnll be located in the upper reaches of the Poteau River in Oklahoma. This river is about 126 miles lonb and drains an area of about 1,900 square miles. Its upper reaches embrace a rugged ~untainous country. The river valley and its flood plain are fairly narrow. Between "::tster and Poteau lies the largest body of land in the entire flood plain of the river. The Y/ister Reservoir <would pro- tect all of the flood plain area of tho main stem as far donn as the mouth of James Fork. BJ:lOunting to about 18,000 acres. Thirty thousand acres would be protected 96 per cent of the time. The reservoir would reduce the peak disoharge of the 1927 flood from 80,000 c.f.s. to 2407