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Mother of 2 Killed in Tunnel Collapse at California Construction Site

A second person was injured and work on the $84 million water tunnel project has been suspended, officials said.

  • On Tuesday, 35-year-old Twyla Capurro died in a tunnel collapse at the Canyon Tunnel Project in Calaveras County; Modesto Fire Department crews recovered her body at 10:04 p.m.
  • Construction on the $84 million project began in January to replace an older Joint Supply Canal, as the massive 12,106-foot tunnel was designed to bypass areas vulnerable to rockslides and landslides.
  • Drill Tech, the construction contractor, faces scrutiny after this incident marks the second deadly accident at one of their sites in five years; OSHA records show a prior $18,000 fine from a Dobbins fatality.
  • Construction work has been suspended at the site as the California Division of Occupational Safety and Health investigates the collapse. The South San Joaquin Irrigation District and Oakdale Irrigation District expressed condolences to Capurro's family.
  • The project is slated for completion in April of 2028, though the timeline may shift following the collapse. The Calaveras County Sheriff's Office has assumed control of the ongoing investigation.
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Mother of 2 killed in tunnel collapse at California construction site

A woman killed in a tunnel collapse at a construction site in California has been identified as a 35-year-old employee of the engineering and design firm involved in the project.

·Pittsburgh, United States
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KCRA 3 broke the news in Sacramento, United States on Wednesday, April 15, 2026.
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