OIL REFINERIES IN SAN ANTONIO AND BEXAR COUNTY Thomas E. Ewing, Frontera Exploration Consultants SUMMARY At least 16 crude oil refineries have recorded production, although only one remains today, the TSAR on South Presa. Three sites today are Superfund sites, one is an active products terminal, and the others are vacant or covered by development. This paper inventories the known and possible sites, with my best estimate of location and dates that they were active. There were two waves of refinery construction.
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STGS Spring Field Trip - Texas Drainage Tunnel
April 11th, 2026
This field trip will deepdive, literally, 200 hundred feet into the tunneling (more...)



