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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201795135 - Roof Collapsed On 12 Employees

Accident: 201795135 -- Report ID: 0950644 -- Event Date: 10/04/2001
InspectionOpen DateSICEstablishment Name
11982001710/04/20011541Kiewet Pacific Inc
On October 4, 2001, general contractor employees reported to work at approximately 3:00 a.m. Workers began placing concrete on top of the roof for digester tank Number 19. The concrete was placed in 8-foot-wide rows going from the southbound to the northbound direction, beginning on the west side of the tank and progressing eastward, one row at a time. At approximately 8:30 a.m., 350 cubic yards of concrete was placed on the roof. However, the vertical shoring system beneath collapsed, causing 12 employees, roofing materials, and equipment to fall approximately 58 feet to the bottom of the tank. Coworkers immediately began assisting injured coworkers at the bottom of the tank. Carson Fire department rescue personnel arrived on the scene and began rescue procedures. All 12 employees were hospitalized in various locations in Carson City area for treatments of punctures, concussions, bruises, and fractures.
Keywords: fracture, roof, collapse, concussion, concrete, contusion, puncture
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Sewer/water treatment plant New project or new addition $1,000,000 to $5,000,000 1 50
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 119820017 Hospitalized injury Bruise/Contus/Abras Occupation not reported FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
2 119820017 Hospitalized injury Bruise/Contus/Abras Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
3 119820017 Hospitalized injury Puncture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
4 119820017 Hospitalized injury Puncture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
5 119820017 Hospitalized injury Bruise/Contus/Abras Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
6 119820017 Hospitalized injury Bruise/Contus/Abras Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
7 119820017 Hospitalized injury Concussion Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
8 119820017 Hospitalized injury Concussion Occupation not reported FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
9 119820017 Hospitalized injury Fracture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
10 119820017 Hospitalized injury Fracture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
11 119820017 Hospitalized injury Fracture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure
12 119820017 Hospitalized injury Puncture Construction laborers FallDist:
FallHt:
Cause: Bituminous concrete placement
FatCause: Collapse of structure

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