Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1703 - Klamath Project. Seepage Investigation. Showing contrast between rolled and unrolled earth covering on M-2-a-2 Lateral Buried Membrane Section, looking west. Dorwin Grise, Photo. July 8, 1948", from Black Binders Digital reproduction of photograph: KP-1703 - Klamath Project. Seepage Investigation, Black Binders, Bureau of Reclamation