Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1529-R2 - Klamath Project. Boundary Dam Materials. Piles of silty sand from Test Pit No. 2. Panorama with preceding picture. D. Gross, Photographer. August 20, 1947", from Black Binders Digital reproduction of photograph: KP-1529-R2 - Klamath Project. Boundary Dam Materials, Black Binders, Bureau of Reclamation