Laguna Street Outfall Rehabilitation Project
Overview
The Laguna Street Outfall Rehabilitation Project will repair and rehabilitate the aging outfall structure to ensure the City’s combined sewer system can continue to do its part in protecting public health and the environment.
Construction Update July 2026
This contract includes three locations for outfall upgrades or rehabilitation - Laguna, Howard, and Mission Creek (3rd Street & Berry, 4th Street & Berry, and 4th Street & Channel).
- Laguna CSD Outfall - Construction began April 2026, rehabilitation work complete by Fall 2026.
- Howard Street Outfall - Construction anticipated to begin Fall 2026.
- 3rd Street & Berry Street Outfall: Late June - late July
- 4th Street & Berry Street Outfall: Late June - mid July
- 4th Street & Channel Street Outfall: Late July - late August
For questions, please reach out to us at ssip@sfwater.org or call us at (888)581-7473.
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Project Background
Project Activities
The Laguna Street outfall rehabilitation will include the following activities: concrete spalling and crack repair, rehabilitation of the existing discharge pipe with carbon fiber wrap or similar material, repair to the baffles, and repair of riprap around the discharge pipe. The work will not impact the discharge capability or any sewer operations.
What is a Combined Sewer Discharge?
San Francisco is the only coastal city in California with a combined sewer system that collects and treats both sewage and stormwater in the same network of pipes and treatment facilities. This combined system means that San Francisco treats stormwater runoff when other coastal cities in California would have stormwater – and the debris and pollutants it picks up – flow untreated into water bodies.
In San Francisco, the debris and pollutants in stormwater runoff are treated to the same high standards that the SFPUC uses to treat sewage from buildings before being discharged into San Francisco Bay or the Pacific Ocean. However, during intense storms the system can reach capacity. When this occurs, it is necessary to discharge partially treated wastewater through outfalls around the City. This combined stormwater and wastewater discharge is more than 90% stormwater. It also receives partial treatment – the equivalent of primary treatment at one of our wastewater treatment plants – before it is discharged. This is known as a combined sewer discharge.
These discharge events are monitored and reported in a timely manner to maintain compliance with all regulatory and permitting agencies. Under the Sewer System Improvement Program, projects such as Baker Beach Green Streets are being constructed to further reduce storm-related discharges. Visit the Beach Water Quality Monitoring Program for more information on storm-related discharges and water quality at beaches.
About the Sewer System Improvement Program
The San Francisco Public Utilities Commission recently launched the Sewer System Improvement Program, a citywide investment to upgrade our aging sewer system and provide a more reliable, sustainable, and seismically safe system now and for future generations.
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Construction Look-Ahead
July 2026 Construction Overview:
Week of June 29- *4th Street & Berry Outfall: June 29 – July 3 (Monday to Friday, 7PM - 7AM)
Week of July 6
- *4th Street & Berry Outfall: July 6 – July 11 (Monday to Saturday, 7PM-7AM)
Week of July 13
- *3rd Street & Berry Outfall: July 13 – July 18 (Monday to Saturday, 7PM-7AM)
- Please note that contractor is anticipating 24-hour road closure during this duration of work. Construction and road closures will occur during Giants All- Star Break. For questions, please reach out to magarcia@sfwater.org.
- *4th Street & Berry Street: July 13 – July 14 (Monday to Tuesday, 3AM - 9AM)
- *4th Street & Channel Street Outfall: July 15 – July 16 (Wednesday to Thursday, 4:30AM-10AM)
Week of July 20
- *3rd Street & Berry Outfall: July 20 – July 23 (Monday to Thursday, 7PM to 7AM)
- Please note that contractor is anticipating 24-hour road closure during this duration of work. Construction and road closures will occur during Giants All- Star Break. For questions, please reach out to magarcia@sfwater.org.
- *4th Street & Channel Outfall: July 20 – July 25 (Monday to Saturday, 7PM to 7AM)
Week of July 27
- *3rd Street & Berry Outfall: July 27 – July 28 (Monday to Tuesday, 3AM – 8AM)
- *4th Street & Channel Outfall: July 27 – August 1 (Monday to Saturday, 7PM –7AM)
*Work is anticipated to occur at night, but please note that schedule is subject to change. For questions and concerns, please reach out to us at ssip@sfwater.org or at (888) 581-7473.
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Project Materials
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