Progress continues on the Wall and Soil Improvements Project, with major work expected to be completed by the end of the year. Remaining work outside the new wall includes removal of temporary fencing, landscaping, and bike trail repairs and paving.
These activities will require the temporary closure of the Talbert Marsh Bike Path between Brookhurst Street and the Santa Ana River.
Upcoming Work
What:Â Landscaping between the bike path and the new wall
When: July 30–September 4*
Hours: Monday–Friday, 7 a.m.–3:30 p.m.
What to Expect:
- No access to the Talbert Marsh Bike Path between Brookhurst Street and the Santa Ana River during work hours.
- The bike path will reopen after work hours and on weekends.
- Please use the posted detour route shown on the map below.
- Temporary 24/7 closure of the bike trail is expected later this year for bike trail repairs. Additional information will be posted as the schedule is confirmed.
Please check the page regularly for the most up-to-date information.Â
*All dates and time are subject to change due to operational factors or inclement weather.
Aerial map showing the closed path and detour.
Section of the new concrete wall.
We appreciate your continued patience and support as we complete this important safety improvement!
Project Description
This project will make soil improvements and replace the perimeter chain link fence at the southern end of Plant No. 2 along the Talbert Marsh with a concrete wall. Soil improvements will help to protect facilities of ground movements from seismic events. The top of the wall will have a wave-like pattern ranging between 8-feet to 11-feet tall. Existing vegetation, landscaping, and tiered concrete block planters behind the fence will be removed. New trees, native plants, and drought resistant vegetation will be planted.
Below is a view from Brookhurst Avenue looking towards the southwest corner of Plant No. 2. The images show the current view and a rendering of the same location when the project is completed.
The wall with have stamped concrete artwork of marsh birds to embrace its location adjacent the Talbert Marsh and Pacific Ocean.
Project Background
OC San Plant No. 2 falls under Homeland Security guidelines for critical infrastructure. The wall will provide site security, visual screening of the process facilities, future sea level flooding protection, and designed to withstand tsunami forces. Soil improvements will provide lateral spread mitigation by keeping large structures, current and future, in place so they do not shift.
CEQA:Â
This project is part of the Biosolids Master Plan. All CEQA documents can be viewed here.
Status:Â
Construction started spring 2025 and will take approximately 2.5 years to complete.
Soil improvements using deep soil mixing will occur the first half of the construction, followed by the construction of the wall.
Stay In The Know
Community Liaison:
(714) 378-2965
Email:
constructionhotline@ocsan.gov
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Related Construction
Site Location
Construction Schedule
2025-2027
Construction Budget
$25.3 million