Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1607 - Klamath Project. Coppock Bay. Buried asphalt membrane section of M-2-a-2 Lateral. Closeup of rolled earth cover. Dorwin Grise, Photographer. October 31, 1947", from Black Binders Digital reproduction of photograph: KP-1607 - Klamath Project. Coppock Bay, Black Binders, Bureau of Reclamation