Historical Marker
Humphrey the Humpback Whale
Historical marker location:
Rio Vista, California
( Marker is on Main Street near North Front Street, on the right when traveling north.)
Marker installed: 1986
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.