Cypress Trunk Sewer

Cypress Trunk Sewer

As we step into the new year, we’re excited to continue making safe and efficient progress on the Cypress Trunk Sewer Project. Stay informed on the latest project updates by visiting this page regularly.

City of Cypress & Los Alamitos

Current Work

Location: Bloomfield St. (see map below)

Work is taking place at night during low-flow and includes pipe inspection, cleaning, and grouting.

• When: Ongoing – late January 2026*
• Hours: Sunday – Friday, 8:00 p.m.–6:00 a.m.*

Location: Moody St. (see map below)

Crews are currently performing manhole rehabilitation work and street restoration at various locations on Moody St.

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

Upcoming Work 

Location: Denni St. between Ball Rd. and Orange Ave. (see map below)

Crews will be performing rehabilitation work at multiple manholes along a small portion of Denni St.

• When: Starting as early as Thursday, January 15, lasting approximately 3 weekdays*
• Hours: Monday–Friday, 8:30 a.m.–4:30 p.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