Original photograph: 18 x 13 cm, black & white photo, caption under photo reads "KP-1644-R2 - Klamath Project. Center of South Main Dike. Viewed to the east across southeast end of sump. L. H. Wollenberg, Photo. February 20, 1948", from Black Binders Digital reproduction of photograph: KP-1644-R2 - Klamath Project. Center of South Main Dike, Black Binders, Bureau of Reclamation