An image of President Roosevelt in his car en route to the dedication of Boulder Dam (officially renamed Hoover Dam in 1947).

An image of President Franklin D. Roosevelt giving a speech to a crowd at the Boulder Dam dedication ceremony (officially renamed Hoover Dam in 1947).

A black and white image of several unidentified men and women associated with the Rotary Club attending the Boulder Dam decennial (officially renamed Hoover Dam in 1947).

An image of Rotary Club members attending a lunch near Boulde Dam (officially renamed Hoover Dam in 1947). Three unidentified men stand beside each other eating food and wearing chef hats.

The view of the Fortification Hill area of Lake Mead as a visiting boat zips across the lake's surface. Two women dressed in their bathing suits playfully wave to the camera from the deck of the boat, as other visitors aid in directing the boat's path. Transcribed on the side of the boat: "27-J-154."

A power boat and its passengers passing through Wishing Well Cove on Lake Mead. The film transparency includes two duplicate images.

A man fishing on the shore of Lake Mead with a boat floating in the background, both of which were located near the upstream face of Hoover Dam. The film transparency includes two duplicate images.