Dynamite explosion breaking ground for the Southern Nevada Water Project, creating the River mountains tunnel.
Transcribed Notes: Transcribed from photo sleeve: "Shown is the dynamite blast at the inlet portal of River Mountains Tunnel, which officially launched construction of the first stage of the $81 million project. The blast was detonated by U.S. Senator Alan Bible from the speakers stand 1.7 miles away, where the groundbreaking ceremony was held."
Elbert Edwards and another man standing in the remains of an irrigation canal of the 1860's built by the members of the Muddy-Cotton Mission. The Muddy river can be seen in the distance.