The General Manager, Manager of Properties, and Manager of Industrial Development in Los Angeles, California sub-series (1900-1976) consists of information related to the physical development of Union Pacific railroad towns and sites outside of Las Vegas, Nevada, including Yermo, California. Files include building leases, sales and purchases of land and water, accounting and other business practices, legislative matters, and industrial development along the Union Pacific rail routes.

The Correspondence of Las Vegas Agents sub-series (1943-1954) contains correspondence between Union Pacific Railroad executives and the official representatives of the railroad, including Walter Bracken.

The Photographs, Schedules, and Instruction Books sub-series (1905-1958) contains photographs of buildings and railway sections, maps, employee operations and instruction books, pay schedules, and related information.