Construction work is continuing on the Wall and Soil Improvements Project. In the coming weeks, you will see more activity at the site as ours crews get ready for a specialized soil improvement process.
We are preparing for cement deep soil mixing – a process where we mix cement into the ground to make the soil stronger. This helps prevent the soil from moving around during earthquakes or heavy rain, keeping our infrastructure safe.
When: Starting as early as late July through early 2026*
Work Hours: Monday – Friday, 7 a.m. – 7 p.m.
All dates and times subject to change due to operational factors or inclement weather.
What to Expect:
- Increased truck and machinery movement near the site
- Increased activity and noise are expected near the construction site
- Equipment such as those seen in the photos below will be arriving
We appreciate your patience as we complete this important safety work!
Mobilization of cement batch plant
Set up of deep soil mixing rig
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, protection from future sea level flood protection, and 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:
This project is part of the Biosolids Master Plan. All CEQA documents can be viewed here.
Status:
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