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Show 338 Further, the Commission is authorized to make surveys to de- termine the utility and practicability of storage sites for the storage of debris or water, or as settling reservoirs, with the object of using them to aid in the improvement and protection of the rivers by preventing deposits therein of "debris resulting from mining operations, natural erosion, or other causes." m Legislative attention has also been directed to the need for salinity control. One example is afforded by the authoriza- tion of the California Central Valley Project, which includes measures to prevent damage from salt water intrusion.112 A more recent instance is the proposed Central Arizona Project, approved by the Senate but not by the House during the second session of the Eighty-first Congress.113 A significant aspect of the proposal concerned the irrigation measures claimed to be necessary for preventing destruction of soil productivity through deposition of salts.114 Finally, the 1950 Flood Control Act authorizes a compre- hensive study of the Arkansas, White, and Red River Basins with a view to beneficial development and utilization of water resources, including consideration of "recreation uses, salinity and sediment control and pollution abatement."115 Pollution Control Until recently, the general desire for clean waters has re- ceived specific recognition in federal legislation only so far as pollution might interfere with navigation. The earlier legislative enactments dealing with refuse matter and de- signed to protect navigation have already been set forth in m § 5,27 Stat. 507, 33 U. S. O. 665. 111 Act of August 26,1937, § 2, 50 Stat. 844, 850. U8 S. 75, 81st Cong., 1st Sess. (1949). u< H. Doc. No. 136, 81st Cong., 1st sess., p. 149 (1949). See also, concerning prevention of intrusion of sea waters Mermentau River and Tributaries, and Gulf Intracoastal Waterway (Sen. Doc. No. 231, 79th Cong., 1st sess., pp. 6, 23, 1945); Sacramento River (Sen. Doc. No. 142, 79th Cong., 2d sess., pp. 31-32, 1946) ; Inland Waterway in Vicinity of Fairfleld, N. C. (H. Doc. No. 723, 80th Cong., 2d sess., pp. 22, 33-34, 1948). m Act of May 17,1950, § 205, 64 Stat. 163, -. |