Original photograph: 12 x 7 cm, black & white photo, with "NA" and "KP" written in front in pencil, caption under photo reads "Clear Lake Dam - Upper trestle and lower slope, October 13, 1909", dark (blue) marks left side (ink), white vertical line (sky, 3 cm from left), white specks throughout, white instrusions along right edge, Bright Blue Album Digital reproduction of photograph: Clear Lake Dam - Upper trestle and lower slope, Bright Blue Album, Bureau of Reclamation
