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Wikipedia: Natl Historic Landmarks in Ca: Well No. 4, Pico Canyon Oil Field Graphic
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Wikipedia: Natl Historic Landmarks in Ca: Well No. 4, Pico Canyon Oil Field

For Students 9th - 10th
Drilled in 1876 to 376 feet (115 m), this was the first commercially successful oil well in California, producing 25 barrels a day (4 cubic meters per day).
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