A tunnel collapse near Knights Ferry that left one worker dead and another seriously injured resulted in $212,500 in penalties against two companies, according to the state workplace safety agency Cal/OSHA.
Drill Tech Drilling & Shoring Inc. and Provost & Pritchard Engineering Group Inc. were building a 12,000-foot diversion tunnel for the South San Joaquin Irrigation District when it collapsed in April, resulting in fatal injuries to Twyla Capurro, a 35-year-old geologist.
Cal/OSHA determined that both companies failed to adequately support dangerous ground inside the tunnel.
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