Original Caption: Highway through desert near Colorado River. Road is constructed in a series of dips as a protection against flash flooding, May 1972 U.S. National Archives’ Local Identifier: 412-DA-6516 Photographer: O'Rear, Charles, 1941- Subjects: Blythe (California) Environmental Protection Agency Project DOCUMERICA Persistent URL: research.archives.gov/description/549002 Repository: Still Picture Records Section, Special Media Archives Services Division (NWCS-S), National Archives at…