• Aerial view of San Pedro and the Port of Los Angeles.

    Protecting local waterways
 by addressing aging infrastructure

  • Black-and-white historical image of the old tunnel under construction in the 1930s, showing the exposed tunnel and crew members working on site.

    Restoring a tunnel originally built in 1937

  • Tunnel boring machine head and segment featuring artwork and the name “Rachel,” positioned at the tunnel entrance.

    Modernizing for seismic, capacity, and service for the 21st Century

  • Closeup of water in vital sewer system.

    This vital sewer system serves nearly half of Los Angeles County

A sewer system that serves nearly half of Los Angeles County.

The Clearwater Project is part of efforts to create a more resilient system for managing treated wastewater from our Carson facility.

It will replace the tunnel system built in the 1930s, extending to the ocean outfalls off the Palos Verdes Peninsula to meet 21st-century standards and population needs.

Project Updates

Western Avenue
Tunnel Construction
Royal Palms Beach

Western Avenue

Updates on construction activities affecting Western Ave traffic.

All Western Ave Updates
Featured
Current Traffic Control Update for Western Avenue
Current Traffic Control Update for Western Avenue

Traffic control and road maintenance on Western Avenue will continue on Wednesday, August 26 and Thursday, August 27.

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Traffic Notice for Western Avenue for Week of August 3
Traffic Notice for Western Avenue for Week of August 3

Road maintenance and LIDAR imaging is scheduled on Western Avenue from Tuesday, August 4, through Thursday, August 6.

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Western Avenue Traffic Alert for June 30
Western Avenue Traffic Alert for June 30

Work is scheduled on Western Avenue on Tuesday, June 30.

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Tunnel Construction

Updates on the tunnel construction activities and progress

More Tunnel Updates
Featured
Tunnel Re-entry Update
Tunnel Re-entry Update

Contractors keep making progress to repair the Clearwater Tunnel at the point of the breach.

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Tunnel Recovery and Re-Entry Update May 2026
Tunnel Recovery and Re-Entry Update May 2026

Contractors are making significant progress to repair the Clearwater Tunnel.

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Tunnel Recovery and Re-Entry Update
Tunnel Recovery and Re-Entry Update

The Los Angeles County Sanitation Districts' project contractors are making progress re-entering the Clearwater Tunnel.

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Royal Palms Beach

Updates on the activities around Royal Palm Beach

ALL Royal Palms Beach Updates
Featured
Upcoming Construction Activity at Royal Palms Beach: Concrete Truck Deliveries
Upcoming Construction Activity at Royal Palms Beach: Concrete Truck Deliveries

Construction at Royal Palms Beach is progressing and the Districts continue work with the construction of a concrete crane pad. Concrete truck deliveries begin Friday, August 21, from 7:00 a.m. to 4:00 p.m.

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Upcoming Maintenance of Ocean Outfall Pipes at Royal Palms Beach
Upcoming Maintenance of Ocean Outfall Pipes at Royal Palms Beach

Maintenance of Ocean Outfall Pipes at Royal Palms Beach

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Limited Excavation to Start at Royal Palms Beach
Limited Excavation to Start at Royal Palms Beach

Limited excavation to start at Royal Palms Beach in July.

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VIEW ALL UPDATES
  • Tunnel boring machine head and segment, featuring artwork and the name “Rachel,” being prepared by the crew to enter the tunnel.

    About

    Learn how this critical infrastructure project protects our waterways.

    Learn More
  • Aerial view of the shaft construction site in Carson, with several parked cars, construction equipment, and the shaft visible.

    Updates

    Read the latest project news, including updates specific to your area.

    Learn More
  • Group of people outside viewing presentation boards, with several people carrying blue tote bags.

    Outreach

    Book a presentation for your group or learn about school programs.

    Learn More