Original photograph: 13 x 18 cm, black & white photo, caption under photo reads "KP-1794-R2. Pumping Plant "D" Enlargement. Placing concrete in double barrel discharge pipes for Units 4 & 5. C. O. Wamstad, Photo. June 3, 1949", from Black Binders Digital reproduction of photograph: KP-1794-R2. Pumping Plant "D" Enlargement, Black Binders, Bureau of Reclamation