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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 202541876 - Construction Laborer Is Killed In Trench Collapse

Accident: 202541876 -- Report ID: 0950641 -- Event Date: 07/29/2010
InspectionOpen DateSICEstablishment Name
12615738707/29/20101794Mcgrath Contracting Inc
At approximately 11:00 a.m. on July 29, 2010, Employee #1 was working as a construction laborer for a contractor that engaged in excavation and concrete work. The firm had been hired to perform waterproofing at a two-story single-family residence. Employee #1 was excavating an L-shaped trench approximately sixteen feet long and ten to eleven feet deep to conduct waterproofing and install a perforated drainpipe. On the day of the accident, the 11-foot-deep trench was improperly shored, with four lengths of 2-foot by 4-foot lumber and plywood sheathing located at each end of the top portion of the trench. The bottom 3.5-foot portion of the trench was never shored. At the time of the accident, the foreman and two other workers were working outside the trench. Employee #1 was in the trench taking measurements for the waterproofing fiber and perforated pipe. At approximately 11:00 a.m., employees heard a crumbling noise and found that the corner of the trench where the two sections joined had collapsed. The fire department arrived around 11:04 a.m. and cleared the employees from the site. The Los Angeles Urban Search and Rescue squad and the Los Angeles Fire Department retrieved Employee #1's body at approximately 3:00 p.m.
Keywords: asphyxiated, collapse, suffocated, construction, trench, trench digger, shoring
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Single family or duplex dwelling Maintenance or repair Under $50,000 1 11 X
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 126157387 Fatality Other Construction laborers FallDist:
FallHt:
Cause: Excavation
FatCause: Trench collapse

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