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Show 93 and the needs of irrigation.114 The 1927 River and Harbor Act authorized prosecution of these extensive surveys by the Army Engineers alone.115 And in 1935, Congress directed that such surveys be supplemented by "such additional study or investi- gation as the Chief of Engineers finds necessary to take into account important changes in economic factors as they occur, and additional stream-flow records, or other factual data."116 By June 30, 1949, these authorizations had resulted in surveys of 191 streams.117 With approximately 97% of the task com- pleted, reports on the remaining streams were then well advanced toward conclusion.118 Congress has stipulated a number of general requirements respecting the conduct of examinations and surveys and the composition of reports thereon. Thus, reports on preliminary examinations and surveys, containing plans and estimates, must include a statement as to the rate at which the work should be prosecuted; and in addition to full information re- garding present and prospective commercial importance of the project and the probable benefit to commerce, each report must contain certain data respecting the existence of and need for private and public terminal and transfer facilities, the de- velopment and utilization of water power for industrial and commercial purposes, and other related subjects, provided that "consideration shall be given only to their bearing upon the improvement of navigation," to the possibility and desira- bility of their coordination with navigation improvements "to lessen the cost" of such improvements, and to their relation to the development and regulation of commerce.119 Another general requirement is that every report on a pre- liminary examination and survey concerning a proposed im- provement of the entrance at the mouth of any river or inlet shall also contain information concerning the configuration of m Act of March 3, 1925, § 3, 43 Stat. 1186, 1190. The Colorado River was excepted. Id. 1Vi Act of January 21,1927, § 1, 44 Stat. 1010,1015. 118 Act of August 30, 1935, § 6, 49 Stat. 1028, 1048. 11T Annual Report of the Chief of Engineers, U. S. Abmt, p. 2647 (1949). ™IMd. m Act of March 4,1913, § 3, 37 Stat. 801, 825, 33 U. S. C. 545. |