Bonneville project act of Aug. 20, 1937, ch. 720, 50 Stat. 731, Public 329 (H. R. 7642), 75th Congress, as amended by act of Mar. 6, 1940, ch. 47, 54 Stat. 47, Public 429 (H. R. 7270), 76th Congress, as amended by act of Oct. 23, 1945, ch. 433, 59 Stat. 546, Public 201 (H. R. 2690), 79 Congress, as amended by act of July 26, 1946, ch. 673, 60 Stat 701, Public 550 (S. 1516), 79th Congress, to authorize completion, maintenance, and operation of Bonneville project for navigation, and for other purposes.