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Atomic Bomb Accident at Mars Bluff, March 11, 1958

Florence County · dedicated 2008 · E. Marion Hwy. (U.S. Hwy. 301/76) near the Francis Marion University Campus, Mars Bluff, Mars Bluff

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Front: In 1958, in the midst of the Cold War, the U.S. Air Force accidentally dropped an atomic bomb near here. The unarmed 7,600-lb., 10’8”-long bomb was aboard a B-47E bomber on a training mission headed for England. Its high-explosive trigger detonated on impact, making a crater as large as 35 feet deep and 70 feet wide. Reverse: The bomb landed in the woods behind the asbestos-shingle-sided home of railroad conductor Walter “Bill” Gregg (b. 1921). Gregg, his wife, their three children, and a niece were injured by the concussion, which destroyed the house and outbuildings and did slight damage to buildings within a 5 mile radius.

David Rumsey Map Collection, Stanford Libraries

Marker data: South Carolina Historical Marker Program, SC Department of Archives and History

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