Original photograph: 13 x 8 cm, black & white photo, with "NA" and "KP" written in front in pencil, caption under photo reads "Clear Lake Dam - Excavating trench for toe of rock fill, June 26, 1909", some variation (sky), various small white marks, from Bright Blue Album Digital reproduction of photograph: Clear Lake Dam - Excavating trench for toe of rock fill, Bright Blue Album, Bureau of Reclamation