The Calaveras County community is mourning the tragic loss of a 35 year old woman whose life was cut short in a devastating industrial accident at a major infrastructure project. Twyla Capurro, a tunneling geologist and advisor, lost her life following a tunnel collapse at the Canyon Tunnel Project site near Knights Ferry, California, on a Tuesday afternoon.

According to officials, emergency crews from Modesto Fire and Stanislaus Consolidated Fire responded to the construction site near Schell Road and Sonora Road at approximately 3:42 p.m. after reports of a tunnel failure. When firefighters arrived, one injured worker was found outside the tunnel and transported to a nearby hospital with minor to moderate injuries.

Another person involved in the incident was not injured. Authorities confirmed that Twyla Capurro was trapped during the collapse and later pronounced dead at the scene. Her body was recovered after extended recovery efforts, and she was identified by the Calaveras County Coroner’s Office as a resident of Coulterville, California. As Cal/OSHA launches an investigation into the incident, those who knew Twyla are remembering her not only as a dedicated professional but as a loving mother of two, a devoted fiancé, and a woman with a deep love for the outdoors.

The Tunnel Collapse A Tuesday Afternoon Disaster

The incident occurred at approximately 3:42 p.m. on a Tuesday at the Canyon Tunnel Project site near Schell Road and Sonora Road, close to Knights Ferry, California. The Canyon Tunnel Project is an $84 million infrastructure effort designed to improve water delivery by replacing an aging canal system that has long been vulnerable to rockslides and landslides. The tunnel stretches more than 12,000 feet and is expected to be completed in 2028. It is a massive undertaking, one that requires skilled workers, careful engineering, and rigorous safety protocols.

According to officials, a section of the tunnel came loose during construction. The phrase “came loose” is deceptively simple. In reality, a tunnel collapse is a violent event. Tons of earth, rock, and concrete can shift or fall in an instant, crushing everything in their path. Workers inside the tunnel have little to no warning and nowhere to run. The collapse at the Canyon Tunnel Project site was no exception.

Emergency crews from Modesto Fire and Stanislaus Consolidated Fire responded rapidly to the scene. They arrived to find a chaotic and dangerous situation. One injured worker was found outside the tunnel and was transported to a nearby hospital with minor to moderate injuries. Another person involved in the incident was not injured. But Twyla Capurro was still trapped inside.

The Rescue Extended Recovery Efforts

Authorities confirmed that Twyla Capurro was trapped during the collapse. The rescue efforts were extended, meaning that it took hours to reach her. Rescuers had to stabilize the remaining tunnel structure to prevent further collapse while they worked to extract her body. Every moment was fraught with danger. One wrong move could bring down more debris, injuring or killing the rescuers themselves.

When rescuers finally reached Twyla, she was pronounced dead at the scene. Her injuries were unsurvivable. The collapse had taken her life before anyone could reach her. Her body was recovered and transported to the Calaveras County Coroner’s Office, where she was identified.

The original article does not specify the extent of her injuries, and that is appropriate. Her family does not need those details. What they need is to know that she was recovered with dignity, that she is no longer trapped, that they can begin to grieve.

The Victim Twyla Capurro, 35

Twyla Capurro was 35 years old. She was a resident of Coulterville, California, a small historic town in Mariposa County, near the border of Calaveras County. She worked as a tunneling geologist and advisor for Provost & Pritchard Consulting Group, an engineering and design firm involved in the Canyon Tunnel Project. Officials with the South San Joaquin Irrigation District and Oakdale Irrigation District confirmed her role on the project.

A tunneling geologist is a specialist who studies the geological conditions of the earth through which a tunnel will be dug. They analyze rock formations, soil stability, water content, and other factors that could affect the safety and success of the tunnel. Twyla’s job was to help ensure that the tunnel would be safe for the workers who built it and for the communities that would rely on it. Tragically, the tunnel claimed her life before it could be completed.

Beyond her professional achievements, Twyla is being remembered as a loving mother of two, a devoted fiancé, and a woman with a deep love for the outdoors. Those closest to her describe her as hardworking, kind, and deeply dedicated to both her family and her career. She was a woman who balanced the demands of a challenging profession with the joys and responsibilities of motherhood. She had a fiancé who loved her and children who adored her. Now they must face a future without her.

A company representative described the incident as involving a section of the tunnel that came loose during construction. That statement is careful and preliminary. The investigation will determine exactly what came loose, why it came loose, and whether any safety protocols were violated.

The Investigation Cal/OSHA Launches Inquiry

Cal/OSHA, the California Division of Occupational Safety and Health, has launched an investigation into the incident to determine what led to the collapse and whether all required safety measures were in place at the time of the accident. Cal/OSHA is the state agency responsible for enforcing workplace safety regulations. Their investigators will examine the tunnel design, the construction methods, the materials used, and the actions of the workers and supervisors on the day of the collapse.

The investigation will also review whether the required safety measures were in place. Tunnel construction is inherently dangerous, and there are strict regulations governing shoring, ventilation, communication, and emergency response. If Cal/OSHA finds that any of these regulations were violated, the company or individuals responsible could face fines, penalties, or even criminal charges.

The investigation may take months to complete. The final report will be public, and it will provide answers to the questions that Twyla’s family and the community are asking. But those answers will not bring her back.

The Canyon Tunnel Project An $84 Million Infrastructure Effort

The Canyon Tunnel Project is a major infrastructure effort, with a price tag of $84 million. It is designed to improve water delivery to the South San Joaquin Irrigation District and the Oakdale Irrigation District, replacing an aging canal system that has long been vulnerable to rockslides and landslides. The tunnel stretches more than 12,000 feet, more than two miles, through the foothills of the Sierra Nevada.

The project is expected to be completed in 2028. It will provide reliable water delivery to farms and communities for generations. But now the project is also the site of a fatality. The workers who continue the tunnel will do so knowing that a colleague died there. The project will be completed, but it will carry Twyla Capurro’s memory with it.

The Community Mourning a Loving Mother and Professional

The Calaveras County community is mourning the tragic loss of Twyla Capurro. She was a familiar presence in the area, known for her work, her kindness, and her love for the outdoors. She leaves behind two children and a fiancé, as well as parents, siblings, and friends who are devastated by her loss.

A GoFundMe has been created to support her family with funeral expenses during this difficult time. The link is provided in the original article. The existence of the GoFundMe is a testament to the community’s desire to help. Neighbors, colleagues, and strangers can contribute to ease the financial burden of an unexpected death. Funeral expenses, counseling, and lost income are all costs that the family should not have to bear alone.

Her passing leaves a profound void in the lives of those who knew her, both personally and professionally. Twyla Capurro will be remembered for her strength, her compassion, and the impact she made in her time on this earth. She was a woman who worked hard, loved deeply, and made the world a better place through her work and her presence.

Holding Onto Memories

As the Cal/OSHA investigation continues and the community mourns, the family and friends of Twyla Capurro are left to do the hardest work of all. They must hold onto their memories of her while also confronting the reality of her death. They must grieve her loss while also caring for her children and supporting her fiancé. They must be patient while the investigation proceeds, even though every day without answers feels like an eternity.

Twyla was 35. She had decades of life ahead of her. She had children who need their mother, a fiancé who needs his partner, dreams that will never be fulfilled. That is the unspeakable tragedy of a sudden death. It is not just the loss of what was. It is the loss of what could have been.

But what was still matters. The 35 years that Twyla lived, the people she loved, the joy she brought, the memories she created these things are not erased by her death. They remain. They are the inheritance of her children, her fiancé, her family, and her friends. And as long as those memories are held and shared and cherished, Twyla Capurro will never truly be gone.

Conclusion A Life of Strength and Compassion

The death of Twyla Capurro at age 35 in a tunnel collapse at the Canyon Tunnel Project site near Knights Ferry, California, is a tragedy that has left a family shattered, a community in mourning, and an industry questioning its safety protocols. A woman who dedicated her career to understanding the earth beneath our feet was killed by that same earth. A mother of two is gone. A fiancé is grieving. A project is paused.

Cal/OSHA will conduct its investigation. The answers will come, though they will not bring Twyla back. Only time, and love, and memory can do that work. As the community mourns, they are also supporting Twyla’s family through the GoFundMe, through prayers, through presence. They are remembering her strength, her compassion, and her impact.

Rest in peace, Twyla Capurro. You were loved. You will be missed. And your memory will live on in the hearts of your children, your fiancé, your family, and everyone who knew you. You will not be forgotten.