Zanja Madre

Historical marker location:

4 Olvera St # C, Los Angeles, California

( Marker can be reached from Olvera Street south of Cesar E Chavez Avenue, on the left when traveling south.)

Marker installed: 1952

California was the site of the nation's first successful oil well in 1892. The well was drilled in the city of Los Angeles and produced about 25 barrels of oil a day. Today, California remains a major oil-producing state.