Cypress Trunk Sewer

Cypress Trunk Sewer

Construction on the Cypress Trunk Sewer Project is ongoing, with crews currently working in the City of Cypress. This webpage will be updated regularly with the latest project information.

To help keep traffic lighter during the holiday season and our crews safe during the rain, no construction work will take place from Wednesday, December 31– Saturday, January 3.

City of Cypress

Current Work

Location: Orange Ave. (see map below)

Crews are performing manhole preparation and rehabilitation at several locations along Orange Ave. This first phase is focusing on raising manhole frames and covers. Crews will return at a later date to install new manhole liners.

• When: Ongoing – January 2026*
• Hours: Monday–Friday, 8:30 a.m.–4:30 p.m.*

Location: Moody St. (see map below)

Crews are currently performing street restoration on Moody St. Following this phase of work, crews will move onto manhole rehabilitation work.

• When: Ongoing – February 2026*
• Hours: Monday–Friday, 8:30 a.m.–4:30 p.m.*

Upcoming Work 

Location: Bloomfield St. (see map below)

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

• When: Starting as early as Sunday, January 4 – late January 2026*
• Hours: Sunday–Friday, 8:00 p.m.–6:00 a.m.*

Work Impacts: 

• Reduced traffic lanes – left turns may be limited
• Temporary 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 began in Summer 2025 and is anticipated to 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