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Show 570 on the basis of such purposes." Nor is the requirement effec- tive with respect to storage space not "allocated for flood con- trol or navigation," even though there be additional storage which might be used for these purposes. We have earlier noted a restriction of limited application on use of waters for navigation in the operation and maintenance of certain projects. With respect to navigation and flood-con- trol projects authorized since 1944, Congress has prescribed a formula restricting navigation use.413 But it does not apply to pre-1944 projects. And the provision does not operate with respect to waters other than those arising in states lying wholly or partly west of the ninety-eighth meridian. Nor does it specify the relationship between navigation and nonconsump- tive uses, such as power. No comparable provision has been enacted with respect to control of waters for purposes of flood control. In the case of Reclamation projects, Congress has directed the Secretary of the Interior to proceed in conformity with state laws in the appropriation of water for irrigation purposes.414 Moreover, Reclamation Law generally requires that contracts for disposal of power may not be made if they would impair the efficiency of the proj ect for irrigation purposes.415 And the situ- ation is the same in the case of contracts for the supply of water for purposes other than irrigation.416 Pertinent also are certain provisions of statute concerning fish and wildlife. Since 1946, it has been required that when any federal agency impounds, diverts, or controls waters, "ade- quate provision consistent with the primary purposes" shall be made for the conservation, maintenance, and management of wildlife.417 Furthermore, in the management of existing facilities in the upper Mississippi River, the Department of 418 See supra, pp. 111-112. "* See supra, pp. 46-49. 415 See, e. g., Act of April 16, 1906, § 5, 34 Stat. 116, 117, as amended, 43 U. S. C. 522; Act of August 4, 1939, § 9(c), 53 Stat. 1187, 1194, 43 U. S. C. 485h(c). 419 Act of February 25,1920, 41 Stat. 451, 43 U. S. C. 521; Act of August 4, 1939, § 9(c), 53 Stat. 1187, 1194, 43 U. S. C. 485h(c). 417 Act of August 14, 1946, § 3, 60 Stat. 1080, 1081 16 U. S. C. 663. |