Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1552 - Klamath Project - Coppock Bay. M-2-a-2 Lateral thoroughly prepared for asphalt membrane lining. Dorwin Grise, Photographer. Sept. 24, 1947", from Black Binders Digital reproduction of photograph: KP-1552 - Klamath Project - Coppock Bay, Black Binders, Bureau of Reclamation