Clearwater Tunnel Update: Inspection Reveals Stability After Breach

URGENT UPDATE: Inspection teams have confirmed that the Clearwater Tunnel, crucial for a new wastewater project in San Pedro, remains stable following a breach that occurred earlier this year. On December 8, 2025, authorities from the Los Angeles County Sanitation Districts announced that the initial three-mile section of the underground structure is intact, allowing for further investigation and potential repairs.

The breach, which occurred approximately 350 feet below Western Avenue, had temporarily trapped 31 workers back in July. Fortunately, all workers were rescued with only minor injuries reported. The inspection is critical as it paves the way for a second phase of re-entry, authorized by Cal/OSHA, to assess conditions within 150 feet of the breach site.

UPDATE: The latest report highlights that a remote inspection identified an empty space measuring 10 feet by 20 feet at the breach site, prompting drilling activities to evaluate underground conditions further. Crews are using advanced technologies, including drones and remotely operated vehicles, to monitor the situation.

Drilling operations on Western Avenue are ongoing around the clock, aiming to reinforce the underground area and determine the best repair methods. “Monitoring of movement at the surface has detected no significant movement at street level,” officials stated, emphasizing the stability of the surrounding area.

Meanwhile, construction at Royal Palms Beach, the endpoint of the Clearwater project, has been suspended since August after the discovery of Native American artifacts. However, as of January 21, 2025, the State Historic Preservation Office has authorized works to resume following a five-month archaeological investigation.

The ambitious $630 million Clearwater Tunneling Project, which began in 2019, aims to replace outdated wastewater infrastructure. Despite the recent breach, which occurred around five to six miles from the only above-ground access point, officials assure that the older wastewater pipes remain operational.

As inspections continue, the entire seven-mile tunnel will be thoroughly evaluated before tunneling can proceed. The Clearwater project is critical for the region’s wastewater management and aims to enhance service for local communities.

Stay tuned for more updates as this story develops and for the latest information on the Clearwater Tunnel situation, visit the Clearwater Project website.