One of the last steam locomotives remaining in service at Bayshore was shop switcher No. 966.

This 0-6-0 Tank locomotive was originally built as No. 18 for the El Paso & Southwest by American Locomotive Company's Schenectady Works in October 1907. Later renumbered EP&SW No. 408, the locomotive came to SP in the 1924 purchase of the EP&SW. Once on the SP she was renumbered second 1010. And in February of 1937, rebuilt as an 0-6-0T shop switcher, and given the number 966. She was immediately assigned to Bayshore. No. 966 was vacated from the roster at Bayshore in June of 1958, then sold for scrap two years later on April 7, 1960 to Luria Brothers of South San Francisco.

The end of Bayshore's need for steam locomotive shop facilities was tied directly into the company's aggressive posture on dieselization. Major diesel maintenance and heavy repair was now concentrated at Roseville, Sacramento, Houston and Pine Bluff (on the SSW). Only switching and local freight units were now assigned to divisions points.

Passenger and freight diesel locomotives were assigned to inter-divisional pools and did not need extra shop facilities for heavy maintenance.

Many roundhouses around the system remained active for a while in order to shelter diesels laying over between runs or in need of minor inspection or repair. But soon these facilities became too expensive to operate and maintain. Mission Bay Roundhouse closed on February 27, 1960 with diesel locomotives 

assigned to the San Francisco-Los Angeles passenger and commute pool being stored on layover tracks built at Seventh and Townsend streets. Mission Bay roundhouse was eventually razed and today is hardly more than a smudge. .

Today, mighty Bayshore Yard is but a vacant lot with two tracks used for car storage. Though the roundhouse still stands, it appears out of place, surrounded by weeds and open land. Where once whisker tracks full of steaming Cab Forwards and burbling Trainmasters one lay now only a few abandoned structures and part of the outshop still stand. 

This once a very busy rail facility can now only be seen and imagined through photos and stories as another piece of Bay Area rail history fades into memory..