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In page Spindletop:
Production at Spindletop began to decline rapidly after 1902, and the wells produced only 10,000 barrels per day (1,600 m3/d) by 1904. On November 14, 1925, the Yount-Lee Oil Company brought in its McFaddin No. 2 at a depth of about 2,500 feet (800 m), sparking a second boom, which culminated in the field's peak production year of 1927, during which 21 million barrels (3.3 GL) were produced. Over the ten years following the McFaddin discovery, more than 72 million barrels (11.4 GL) of oil were produced, mostly from the newer areas of the field. Spindletop continued as a productive source of oil until about 1936. It was then mined for sulfur from the 1950s to about 1975.