On March 18, 1911, TR spoke at the dedication of the Roosevelt Dam. Providing irrigation for the Salt River Valley area of the territory of Arizona, the dam is largely the result of TR's reclamation efforts while President. On driveway along top of dam, TR, officials, and crowd look intently over the side of the dam. TR has probably just pushed the electric switch opening the sluice gates on the dam's northern slope. Long shot of TR addressing crowd, with the following officials identified behind him on platform: territorial Governor of Arizona, Richard E. Sloan; Louis C. Hill, engineer in charge of dam construction; and Benjamin A. Fowler, president of the National Irrigation Congress.