Original photograph: 9 x 14 cm, black & white photo, with "100a" written in front in red ink, caption under photo reads "#33 - Concrete Steel culvert under Main Canal, Div.3, August 15, 1906", from Brown Album, reorganized by Elaine Roggensees, 1987 , Digital reproduction of photograph: Concrete Steel culvert under Main Canal, Div.3, Brown Album, Bureau of Reclamation