In 1925 the Union Pacific Railroad Company began surveying a line from Cottier to Torrington in preparation for construction of a railroad extension to a proposed Holly Sugar factory to be built just south of the Torrington city limits. Six acres of land opposite the factory had been purchased for the proposed new Union Pacific Depot. The South Torrington Union Pacific Depot was constructed in 1926 as a passenger and freight depot. It was designed by Gilbert Stanley Underwood and Company of Los Angeles in the Spanish Mission architectural style. It is constructed of reinforced concrete with red-brick trim and a colored-slate roof. The north and south ends of the building are one story in height, while the south-central portion is two stories. The second story included a living quarters containing five rooms, two bedrooms, living room, kitchen, and a bath. The main level contained a freight and baggage room, a holdover room and record room, an agent's office, a passenger waiting room, and restrooms.

This thematic study includes twelve post offices owned and administered by the U.S. Postal Service (USPS) throughout the State of Wyoming. These include the Basin, Greybull, Douglas, Lander, Torrington, Thermopolis, Buffalo, Kemmerer, Powell, Yellowstone, Evanston, and Newcastle Main Post Offices. The buildings represent a continuum of federally constructed post offices allocated to the state between the turn of the century and 1941. The buildings exhibit a variety of styles and sizes but maintain a common demeanor representative of the federal presence. All of the buildings were constructed from standardized plans developed from guidelines provided by the Office of the Supervising Architect in the Treasury Department. Variations in design styles reflect both the transition in the design philosophies of the Supervising Architect and the requirements developed in response to the Depression. These variations in design, as well as functions are also somewhat related to the communities in which they were placed and reflect the economic, political, and governmental context of those communities.