Southern Pacific #2852 is a C-10 Class Consolidation
(2-8-0) type locomotive, one of nineteen built by in the SP’s Sacramento Shops in 1919. It worked in California, the last few years near Newark until retired in 1958. It was donated to the City of Orland in 1959 and went on display in the Glenn County Fairgrounds where it has remained ever since. It is an example of one of four Harriman “Common Standard” locomotive designs developed for the Associated Railroads (the others were the 4-4-2, 4-6-2 and 0-6-0).
“Common Standard” was an SP initiative that standardised many design features and therefore delivered lower costs on everything from locomotives, dining cars and passenger coaches to cabooses and signal lanterns. After the Union Pacific took control of the SP in 1901, the approach was known as the “Associated Lines Common Standard”. In 1904, the operating and mechanical departments of the two railroads were amalgamated, the UP adopted the Common Standard and the combined system shared groups of locomotives, cars and other equipment.
You can see other “Common Standard” Consolidations on this website on the UP C-2 #6051, UP C-2 #237 and UP C-2 #616 pages.