Black Diamond

Historical marker location:

Pittsburg, California

( Marker is at the intersection of East 5th Street and Marina Boulevard, on the right when traveling west on East 5th Street.)

Marker installed: 1995

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.