Airway-Airport Loop Sewer Rehabilitation Project

Construction continues on the Airway-Airport Loop Sewer Rehabilitation project. The project rehabilitates two regional sewer pipelines, occurring in separate phases, to ensure continuous and uninterrupted sewer service.

Traffic lanes have been temporarily reconfigured with striping and k-rail barriers on Airway Avenue and Airport Loop Drive. Keep reading to learn more about upcoming work for the month of June. 

A pre-measured liner is delivered in a refrigerated truck and inserted through a tall tower into the existing pipeline.

LOCATION: Airway Avenue and Airport Loops Drive (3 segments)

• What:  Pipeline rehabilitation by lining the pipe using the cured-in-place pipe (CIPP) method.  More information about CIPP is listed at the end.
• When: 
  • Segment 1: June 11, and lasting 2-3 days
  • Segment 2: Week of June 16, and lasting 2-3 days*
  • Segment 3: Week of June 23, and lasting 2-3 days*
• Work Hours: Starting at 7 a.m. and continuing with 24/7 work
• What to Expect:
  
  • Odors may be noticeable in the immediate area but are temporary.
  • Increase in activity and noise levels.
  • As part of the CIPP process, OC San project contractors will be running water hoses into the local manholes near the construction site to discharge water from the project. Hoses will also be connected to fire hydrants for water.
  • Some parking spaces may be coned off to route water hoses.

LOCATION:  Intersection of Baker Street and Airway Avenue

• What: Excavation and pipeline replacement work
• When: Starting week of June 23 and lasting approximately 2-3 weeks*
• Hours: Nightwork, Monday – Friday, 9 p.m. – 6 a.m.
• What to Expect: 
  • Traffic control with reduced lanes with one way traffic at a time
  • Flaggers will be onsite to assist with directing traffic
  • Increase in activity and noise levels

LOCATION:  Main Street Pump Station, 1499 Main St., Irvine

• What:  Rehabilitating and constructing pipelines, pumps, and valves
• When:  Ongoing – July 2025*
• Work Hours:  Monday – Friday, 7 a.m. – 5:30 p.m.
• What to Expect:
  • Occasional reduced travel lanes on westbound Main St.
  • Increase in activity and noise levels

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

About Cured-in-Place Pipe (CIPP)

A pre-measured liner is delivered in a refrigerated truck and inserted through a tall tower approximately15 – 20 ft high into the existing pipeline through the recently excavated access pits.  After the liner has been inserted, it is filled with water heated to a certain temperature and cured for approximately 36 hours. When fully cured, the liner now acts as the new pipeline. Once the CIPP operation begins, it cannot be stopped until completed, thus requiring the 24/7 continuous work. Crews will be onsite for monitoring throughout the entire process.

Other Information

For information about a nearby project in the City of Costa Mesa, please visit Costa Mesa Sewer Rehabilitation along I-405 Project.