Original photograph: 12 x 7 cm, black & white photo, with "NA" and "KP" written in front in pencil, caption under photo reads "South Branch Canal Heading - Repairing retaining wall - #30 - June 26th, 1909", from Bright Blue Album Digital reproduction of photograph: South Branch Canal Heading - Repairing retaining wall, Bright Blue Album, Bureau of Reclamation