Cypress Trunk Sewer

Cypress Trunk Sewer

Crews continue to make steady, safe progress while minimizing impacts on the community. Work is currently underway in the City of Cypress, with crews scheduled to return to the City of Los Alamitos in the coming weeks.

Current Work – City of Cypress

Location: Intersection of Moody St. and Lincoln Ave.  (see map below)

The temporary bypass system used to maintain sewer service during manhole work has been removed. Over the next few weeks, crews will be restoring the intersection.

• When: Ongoing – December 2025*
• Hours: Monday–Friday, 8:30 a.m.–4:30 p.m.*

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

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

• When: Ongoing, lasting approximately one week*
• Hours: Sunday-Friday, 8:00 p.m.-6:00 a.m.*

Upcoming Work – Cities of Cypress and Los Alamitos

Location: Moody St. between Crescent Ave. and Orange Ave. (see map below)

Crews will be performing manhole preparation and rehabilitation work at multiple locations along Moody St. Street restoration will follow.

• When: Starting as early as Thursday, December 4, lasting approximately one month*
• Hours: Monday–Friday, 8:30 a.m.–4:30 p.m.*

Location: Starting near the intersection of Denni St. and Ball Ave., moving south toward Katella Ave. (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, December 7 – end of December 2025*
• 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 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