Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1500-R2 - Klamath Project. Compacting "M" Canal subgrade by means of dragline. Canal lining preparation. Dorwin Grise, Photographer. June 12, 1947", from Black Binders Digital reproduction of photograph: KP-1500-R2 - Klamath Project, Black Binders, Bureau of Reclamation