隧道塌方致1死1重伤 加州职业安全局对两家公司开出21.25万美元罚单
Sacramento——加州职业安全与健康管理局（Cal/OSHA）10月15日宣布，该局已就今年4月14日骑士渡（Knights Ferry）附近峡谷隧道（Canyon Tunnel）工程塌方事故，对两家雇主开出合计21.25万美元的拟议罚款。塌方发生在隧道内200英尺处，两名工人被困：35岁的地质学家特怀拉·卡普罗（Twyla Capurro）受致命伤身亡，另一名工人重伤。
这条长逾12000英尺的灌溉引水隧道，由总部位于克洛维斯的普罗沃斯特与普里查德工程集团（Provost & Pritchard Engineering Group）设计，安蒂奥克的钻探技术钻井与支护公司（Drill Tech Drilling & Shoring）为南圣华金灌溉区施工。Cal/OSHA调查认定，两家雇主都放任工人在已确认的危险地层未被清除或充分支护的情况下继续作业，也未对工人作业的隧道断面提供可靠支撑，导致塌方。
9月30日，Cal/OSHA矿山与隧道处开出罚单：钻探技术公司拟罚95000美元，包括一项与事故相关的严重地层管控违规和一项故意-严重隧道支撑违规；普罗沃斯特与普里查德拟罚117500美元，包括一项严重培训违规、一项严重地层管控违规和一项故意-严重隧道支撑违规。普罗沃斯特与普里查德已就罚单提出上诉。Cal/OSHA调查局的另一项调查仍在进行中。
Cal/OSHA局长黛布拉·李（Debra Lee）表示：「隧道塌方造成的死亡和重伤完全可以预防。Cal/OSHA一再提醒雇主，必须提供充分的支护和安全措施，保护工人免于在突发塌方中被掩埋或压伤。拿工人的生命冒险，没有任何借口。」
据项目业主介绍，峡谷隧道工程由南圣华金灌溉区与奥克代尔灌溉区合建，造价约8400万美元、全长约12106英尺，绕行联合供水渠的脆弱河段，水源来自斯坦尼斯劳斯河上的古德温坝（Goodwin Dam）；施工合同于2025年7月授予钻探技术公司，同年8月开工。
Cal/OSHA Cites Two Employers $212,500 After Fatal Canyon Tunnel Collapse Near Knights Ferry
SACRAMENTO — Cal/OSHA has cited two employers a combined $212,500 in proposed penalties following an April 14, 2026 tunnel collapse near Knights Ferry that killed one worker and seriously injured another, the California Department of Industrial Relations announced on October 15. The collapse occurred 200 feet inside the Canyon Tunnel construction project, trapping two employees. Twyla Capurro, a 35-year-old geologist, suffered fatal injuries, while another worker was seriously injured.
The more than 12,000-foot-long irrigation water diversion tunnel was designed by Provost & Pritchard Engineering Group, Inc. of Clovis and was being built by Drill Tech Drilling & Shoring, Inc. of Antioch for the South San Joaquin Irrigation District. Cal/OSHA found that both employers allowed work to proceed without removing or adequately supporting identified dangerous ground, and failed to securely support the tunnel section where employees were working, resulting in the collapse.
On September 30, 2026, Cal/OSHA's Mining and Tunneling Unit issued the citations. Drill Tech was cited $95,000 in proposed penalties for one serious accident-related ground control violation and one willful-serious accident-related tunnel support violation. Provost & Pritchard was cited $117,500 for one serious training violation, one serious accident-related ground control violation and one willful-serious accident-related tunnel support violation. Provost & Pritchard has appealed the citations. Cal/OSHA's Bureau of Investigations is conducting a separate investigation, which remains ongoing.
"Deaths and serious injuries from tunnel collapses are entirely preventable," said Cal/OSHA Chief Debra Lee. "Cal/OSHA consistently reminds employers of the need to provide adequate support and safety measures to protect workers from being buried or crushed in a sudden collapse. There is absolutely no justification for putting a worker's life at risk."
According to the project owners, the roughly $84 million Canyon Tunnel, jointly built by the South San Joaquin and Oakdale irrigation districts, runs about 12,106 feet and will bypass a vulnerable reach of the Joint Supply Canal carrying water from Goodwin Dam on the Stanislaus River. The construction contract was awarded to Drill Tech in July 2025, and work began that August.
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图片来源：图：骑士渡廊桥横跨斯坦尼斯劳斯河，峡谷隧道工程即位于骑士渡附近（资料图，Wikimedia Commons，公共领域）。Knights Ferry covered bridge over the Stanislaus River, near the Canyon Tunnel project site (file photo, Wikimedia Commons, public domain).
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