In August 1925, Michigan’s first oil field was discovered at Deindorfer Woods in Saginaw. The Saginaw Prospecting Company drilled well “Number One” and found oil at a depth of 1,873 feet, with the well initially yielding twenty-three barrels of crude oil per day. The discovery quickly attracted the attention of Standard Oil and the Sun Oil Companies, which sent scouts to Saginaw. By the turn of the twenty-first century, oil and gas exploration and production in Michigan had expanded to sixty-three counties and produced one-fifth of the petroleum energy the state consumed.