What to know
- Night work with temporary, full closure of the 134 West Freeway interchange to the 5 North Freeway
- 9 pm Friday evening, April 3, 2026 – 5 am Saturday morning, April 4, 2026
- Alternate route: 5 South Freeway to the Colorado Boulevard exit to access 5 North Freeway; detour
- Mitigation measures will be in place to reduce odors.
- Improvements to the pipeline will ensure that your sewers are reliable for decades to come.
City of Los Angeles Department of Public Works Traffic Advisory
North Outfall Sewer (NOS) Units 20 and 21 – Zoo Drive Right-of-Way to Doran Street
Sewer Rehabilitation Project
What:
- Night work with temporary, full closure of the 134 West Freeway interchange to the 5 North Freeway as part of the North Outfall Sewer Units 20 and 21 – Zoo Drive Right-of-Way (ROW) to Doran Street Sewer Rehabilitation Project
- Implementation of temporary traffic control for K-rail placement and restriping of travel lanes
When:
- 9 pm Friday evening, April 3, 2026 – 5 am Saturday morning, April 4, 2026
- Schedule is subject to change due to weather and other unforeseen circumstances
Where:
- The 134 West Freeway interchange to the 5 North Freeway will be closed
- There will be no on-ramp or off-ramp closures; all on-ramps and off-ramps will remain open and accessible signage will be posted
- Alternate route: 5 South Freeway to the Colorado Boulevard exit to access 5 North Freeway; detour
Project Background:
LA Sanitation & Environment is rehabilitating portions of the North Outfall Sewer Units 20 and 21 from Zoo Drive Right-of-Way (ROW) from the southeast corner of Griffith Park Ferraro Fields to the northwest corner of Griffith Park Ferraro Fields; Doran Street from West San Fernando Road to the end of the cul de sac (near the LA River); and westbound portions of the I-5 and 134 Ventura Freeways.
This project is necessary in order to protect the reliability of the sewer pipeline system. The project will include cleaning of the sewer pipes and existing siphons, excavation and construction of sewer access pits, replacement/rehabilitation of existing maintenance holes (MH), and rehabilitation or replacement of the sewer pipes and existing siphons.
Mitigation measures will be in place to reduce odors. Improvements to the pipeline will ensure that your sewers are reliable for decades to come. The overall projects dates are Summer 2025 through Summer 2027.
Contact:
- For media inquiries please contact Tonya Shelton, Public Information Director, LA Sanitation & Environment (213) 978-0333 or Tonya.Shelton@lacity.org
- For project related inquiries, please contact LASAN.CleanWater.Outreach@lacity.org or (213) 485-3221; please reference the project name NOS 20/21
- After 5 pm and weekends, call the LA Sanitation & Environment Customer Care Center at (800) 773-2489