Original photograph: 17 x 11 cm, black & white photo, with "A" and "KP" written in front in pencil, caption under photo reads "Clear Lake Dam - Excavation in wastechannel [sic], October 25, 1909", dark (blue) ink upper left, from Bright Blue Album Digital reproduction of photograph: Clear Lake Dam - Excavation in wastechannel [sic], Bright Blue Album, Bureau of Reclamation