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26 3892 MISSOURI RIVER BASIN . 31. Local intcrests are definitely of the opinion that more adequate prol.cction than is provided by existing works is necessary. They also are convinced this must. be accomplished through some unified and well-coordinated ph111, and that the problem is of such magnitude that the burden must be assumed by t.he Federal Govcrnment. This general n.t.t.itude is reflecteu in the discussions in the public hearings held in connection with this report (see 11ppendi.,,< II),' by numerous resolutions adopted uy local orgl1nizl1tions and by the mftny recp.nt contracts with locll.I interests in cOllllection with repair of levees under provisions of section 5 of the 1941 Flood Control Act. IV. PROPOSED FLOOD CONTROL PLAN 32. The plan of flood control proposcd herein consists of a serics of levees ond appurtenant works along both sides of the river from Sioux City, Iowa, to the mouth of the Missouri River, supplementcd by the presently authorized reservoirs in Nebraska, Kansas.. und ~1issollri, and fl.dditionAI multiple-purpose reservoirs, including reservoirs above Sioux City. This plan would provide flood protection for agricultural 1I1I1ds along both sides of the river and protection for the cities of Sioux City, Iowa; Council Bluffs, Iowa; Omaha, Nebr.; and the Kansas Citys, Knns. and Mo. A plan for the protcction of tbe Kansas Citys is described in a survcy report prepnred by the district engineer, K.ansl1s City, dated June 27, 1042, und no chango in that pIon is proposed hercin. The general alignment of tbe proposccllevees is shown on sheets 1 to 9 and the proposed profile of the desigu (Iood is shown on sheets 10 to 1.5, appendix l.' 33. In dct.ermining the degrce of protection which should be pro- vided by the levees, the following faetors were considered: (a) The effect on futurc flood dischargcs of the operat.ion of the system of authorized reservoirs ill the lower part of the basin. (b) The effect on future flood dischargcs of the operation of lDultiple- purpose reservoirs upstremn from Sioux City. , (c) The height to which it is practicable to construct earth levees along the Missouri River without danger of destruction by founda- tion failurc or by dcvelopment of sand boils. (d) The amount of sct-hack of the levees which would be re- quired to provide adequftte Iloodway capacity. 34. Flood discharges ftre, usually greatest in the lower part of the river, which area normally receives the greatest amount of rainfall. Also the valley in the lower end is considerably narrower thftn in the ,upper part. Consequently, the relati\'c degree of prot.eclion which can be economically provided by levces alone is considembly less III the lower part of the river thun in the upper river. This emphasizes the nend for eomplction of the reservoirs now authorizeu for the lower part of the river . 35. Complete protection against all floods of record by levees alone IS Impracticable. However, the levees proposed herein, supplemented by the presently authorized reservoirs in the lower part of the basin and the additional multiple-purpose reservoirs would. provide protec- t.ion bet'\vcen SiOllX, (;it,y, Town, nnd the mouth against all pnst floods of record. I Only pl. 16 i~ printed. 1 Not printed.