Materials depict Las Vegas, Nevada from 1904 to 1973 as it related to the Union Pacific Railroad. The photographs primarily depict early Las Vegas buildings, including Fremont Street, the Arizona Club, the Mormon Fort, and the Hotel Nevada. The photographs also depict Union Pacific officials meeting with Las Vegas officials, including the Las Vegas Chamber of Commerce. Finally, the photographs depict the Union Pacific depots in Las Vegas.

Materials depict hotels and casinos in Las Vegas, Nevada from approximately 1940 to 1959. The photographs primarily depict the Desert Inn, El Rancho Vegas, the Flamingo Hotel, the Hotel Fremont, the Last Frontier Hotel, the Riviera Hotel, the Sands Hotel, and the Thunderbird Hotel. The photographs also depict the Helldorado Days Parade in Las Vegas and the parade floats sponsored by hotels.

Materials depict the Union Pacific Railroad Company's railroad tracks that had been damaged during floods in February and March of 1938 in Southern California and Southern Nevada, including by the Los Angeles Flood of 1938. The photographs primarily depict washed out tracks, damaged bridges, and debris.