Cypress Trunk Sewer

Cypress Trunk Sewer

Work continues on the Cypress Trunk Sewer Project, where crews are making steady and safe progress while minimizing disruptions. Preparation work will soon move into the City of Los Alamitos, the next step in keeping our regional sewer system reliable, running smoothly, and ready for the future.

Current Work – City of Cypress

Location: Intersection of Moody St. and Lincoln Ave. in the City of Cypress (see map below)

A bypass system is currently in place to reroute sewer flow and maintain service while manhole rehabilitation is in place. A mix of day and night work is needed to complete this phase.

When: Ongoing until the end of November*

Hours: Monday–Friday*

• Day: 8:30 a.m.–4:30 p.m.*
• Night: 8:00 p.m.–6:00 a.m.*

What to Expect:

• Reduced lanes on Moody St. between Camp St. and New York Ave.
• Left turns from northbound Moody St. onto Lincoln Ave. will be restricted—follow all posted signs
• Thru traffic will remain open in all directions
• Permanent traffic control will remain in place until work is completed
• Crosswalks may be closed intermittently
• Increased activity, dust, and noise levels

Location: Starting at the intersection of Denni St. and Lincoln Ave., moving south until Orange Ave. Work will then move west on Orange Ave. (see map below).

Work will take place during low-flow hours at night and include pipe inspection, cleaning, and grouting. 

• When: Ongoing until the project route is complete*
• Hours: Sunday-Friday, 8:00 p.m.-6:00 a.m.*
• Impacts: 
  • Reduced traffic lanes
  • Temporary traffic control while work is being performed
  • Increased activity, dust, and noise levels

Upcoming Work – City of Los Alamitos 

Construction crews are heading to the City of Los Alamitos to begin preparation work, starting with daytime manhole measurements. Nighttime pipe cleaning and grouting is expected to begin in December and last one month. Additional details will be shared as nightwork approaches. This preparation is an important step toward upcoming sewer rehabilitation efforts in Los Alamitos.

Location: Along the project route in and bordering the City of Los Alamitos (see map below)

When: Monday, November 24 – Wednesday, November 26*

Hours: 8:30 a.m. – 4:30 p.m*

Impacts:

• Reduced traffic lanes
• Traffic control while work is being performed
• Increased activity, dust, and noise levels

 *All dates and times are subject to change due to operational factors or inclement weather.

Project Description:

The regional sewer line in the cities of Cypress, Los Alamitos, and La Palma is approximately 50 years old and in need of upgrades. The Cypress Trunk Sewer Project will focus on enhancing about 7 miles of sewer, replacing portions of the pipe with larger diameter pipe to increase the capacity, or rehabilitating other segments of pipe to extend the life of the sewer system. Approximately 100 manholes will also be replaced and/or rehabilitated. These repairs will extend the life of the sewer pipes by another 50 years.

Schedule:
Construction is anticipated to begin in Summer 2025 and last approximately 3 years.

Local Sewer Provider: 

• City of Cypress – Maintenance Division – (714) 229-6760
• City of La Palma – Public Works Division – (714) 690-3310
• City of Los Alamitos – Rossmoor / Los Alamitos Area Sewer District – (562) 431-2223