Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1551 - Klamath Project. Coppock Bay. Hand-rolling M-2-a-2 Lateral Bottom. Preparation of lateral for asphalt membrane lining. Dorwin Grise, Photographer. Sept. 24, 1947", from Black Binders Digital reproduction of photograph: KP-1551 - Klamath Project, Black Binders, Bureau of Reclamation