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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 813170 - Employee Killed After Falling During Corn Starch Explosion

Accident: 813170 -- Report ID: 0552700 -- Event Date: 05/18/1993
InspectionOpen DateSICEstablishment Name
12043832005/18/19932099Zumbro River Brands
On May 17, 1993, a semi-trailer load of cornstarch was being unloaded by the positive pressure system on the semi-trailer into a silo by way of a 4-inch-diameter stainless steel pipe. After one hour the silo was nearly full, so Employee #1, the silo operator, switched the manual valve to fill another silo. The manhole cover had been left off and an explosion occurred as the transfer was made using a ceiling-mounted, manual transfer switch. The explosion knocked the floor panels loose, and Employee #1 fell two stories to the main floor. He died. The explosion blew out several walls of the plant, and a fire ignited the wood roof and paper products in the warehouse. Twenty other employees escaped without injury. The half block square building of block and steel beam was destroyed.
Keywords: cover, explosion, fall, off loading, manhole
Employee # Inspection Age Sex Degree Nature Occupation
1 120438320 Fatality Burn/Scald(Heat) Miscellaneous plant and system operators

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