Authorities are continuing to investigate a tragic tunnel collapse that left one worker dead and another injured at the Canyon Tunnel Project earlier this week.
Emergency crews responded Tuesday afternoon to reports of a structural failure at the construction site near Knights Ferry, located along the Calaveras and Stanislaus County line. According to officials, three individuals were involved in the incident when part of the tunnel gave way approximately 200 feet below ground.
One worker, later identified as 35-year-old Twyla Capurro of Coulterville, was inside the tunnel at the time of the collapse and did not survive. Her body was recovered later that evening after an extensive rescue operation. A second individual sustained injuries and was transported to a nearby hospital for treatment. Those injuries were described as minor to moderate. A third worker managed to escape the scene without harm.
Capurro was affiliated with an engineering and design firm working on the project. In response to the incident, all construction activities have been halted while investigators work to determine the exact cause.
Multi-Agency Response and Ongoing Investigation
Fire crews from multiple departments, along with local law enforcement, coordinated a large-scale emergency response involving more than 30 personnel. The site has since been secured, and the investigation has been turned over to the county sheriff’s office, with additional oversight expected from workplace safety regulators.
Preliminary information suggests that a section of the tunnel became unstable and broke loose, though officials have not classified the event as a full cave-in. Investigators are expected to examine construction methods, safety protocols, and environmental factors that may have contributed to the failure.
Workplace accidents like this often raise serious concerns regarding job site safety and whether proper precautions were in place. In cases involving construction incidents, questions of liability and potential personal injury claims frequently arise, particularly when workers are exposed to hazardous conditions.
Project Background and Prior Safety Concerns
The Canyon Tunnel Project is a large-scale infrastructure effort designed to improve water delivery reliability by rerouting a canal system away from areas prone to landslides and rockfall. The multi-million-dollar project began earlier this year and is expected to continue through 2028.
Companies involved in the project include contractors specializing in drilling, marine construction, and rockfall mitigation, as well as engineering firms responsible for design and planning.
This is not the first time safety issues have surfaced in connection with companies working on similar projects. Previous incidents at other job sites have resulted in regulatory fines and, in some cases, fatalities. Those past events are likely to factor into the broader review of safety practices.
Understanding Liability After a Construction Accident: Who Can Be Held Responsible?
Because the victim was employed by a third-party firm but working on-site, liability in this case may extend across multiple parties—including the general contractor, subcontractors, site managers, and even her own employer depending on their role in safety oversight. These situations often involve overlapping responsibilities, making personal injury and wrongful death claims especially complex.
If you or someone you know was involved in a construction accident, don’t wait to get help. Call us today at 512-888-9999 for a free consultation. At DJC Law, we aggressively pursue maximum compensation and hold negligent parties accountable. Our team of personal injury and wrongful death lawyers can help you navigate these complex cases and fight to get the settlement you deserve.
