I visited a friend who was being treated at the SP hospital in the mid '60's. The hospital had a stationary steam plant that actually generated power using a couple of slide valve reciprocating steam engine driven generators. If I remember correctly, the hospital used a weird voltage for their elevators and other support equipment. I seem to remember that someone told me it was 110 volts DC. Anyway, the plant was absolutely spotless. It had Italian Tile floors and everything brass was polished. The electrical panel was marble with open busses. There were two natural gas fired boilers that furnished steam for the generators and heating/process steam for the hospital building. There was a tunnel connecting the utility plant with the main building. In the 1960's the hospital looked REALLY old compared with comparable public facilities.