Email Record: Rio Grande and tributaries, Colorado, above the Colorado-New Mexico boundary line. Letter from the Secretary of War transmitting a letter from the Chief of Engineers, United States Army, dated February 8, 1940, submitting a report, together with accompanying papers and an illustration, on a survey of Rio Grande and tributaries, Colorado, above the Colorado-New Mexico boundary line, authorized by the Flood Control Act approved June 28, 1938.