Name: Pioneer Oil Refinery
Site Number: #172
Date Visited: 10/25/2014
Other Designation: None
Plaque Status: State Marker
Location: 23641 Pine St., Santa Clarita, CA 91321
Coordinates: 34.371102, -118.522242
Description: In 1875 the Star Oil Company, one of the predecessors of the Standard Oil Company of California, drilled its first Pico Canyon well, which yielded about one hundred barrels per day. The discovery resulted in the erection of the first commercial oil refinery in California the following year.