CONSTRUCTION UPDATE
🚧STREETS NEAR WORK AREA: South Coast Drive, San Leandro Lane, Concord Street
The sewer pipeline crossing under the 405 freeway will be rehabilitated. Vactor trucks will be used to vacuum wastewater out of the pipeline from a nearby manhole to keep flows out of the section of pipe that will be rehabilitated.
When: One night only, anticipated to occur in July. Exact date will be provided when schedule is confirmed.
Hours: 9 p.m. – 6 a.m.
*All dates and times are subject to change due to operational factors or inclement weather.
RECENTLY COMPLETED WORK
🚧STREETS NEAR WORK AREA: Fairview Road, Charleston Street
Pipeline rehabilitation using the cured-in-place-pipe (CIPP) method is ongoing. A liner has been inserted into the pipeline and is currently curing.
When: July 7-10, 2025- COMPLETED
🚧STREETS NEAR WORK AREA: Bear Street, Olympic Avenue, Tanana Place
There will be two separate CIPP segments. One segment is near Olympic Avenue and Bear Street. The second is near Bear Street and Tanana Place.
When: June 16 – 20, 2025 – COMPLETED
🚧STREETS NEAR WORK AREA: Concord Street, Tanana Place, Yukon Avenue
When: June 25 – 28, 2025 – COMPLETED
About Cured-in-Place Pipe (CIPP)
A pre-measured liner is delivered in a refrigerated truck and inserted through a manhole opening into the existing pipeline. After the liner has been inserted, it is filled with water that is heated to a certain temperature and cured for several 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.
Project Description
This project will rehabiliate approximately 4 miles of the regional sewer pipeline that runs along the I-405 freeway in the City of Costa Mesa. Project elements include the rehabilitation of gravity sewer pipelines, manhole structure rehabilitation, and manhole access improvements. The project also includes the rehabilitation of sewer pipelines that cross under the I-405 freeway.

Project Map
Stay In The Know
Community Liaison:
(714) 378-2965
Email:
constructionhotline@ocsan.gov
Sign up for text alerts:
click here
Signup for Email Notification
Related Construction
Site Location
Construction Schedule
Summer 2024 - early 2026*
Construction Budget
$43.4 million