The American Society of Civil Engineers featured the Orinda Water Treatment Plant Disinfection Improvements project, a $341 million FlatironDragados sole venture that modernizes critical water infrastructure in the San Francisco Bay Area.
FlatironDragados leads construction in collaboration with Carollo Engineers, Stantec and Arcadis. Together, the team is modernizing infrastructure, enhancing water quality and ensuring long-term reliability for more than 800,000 customers served daily in Orinda and surrounding areas — while keeping the facility in continuous operation.
Originally built in 1935 and located on an extremely compact site, the plant presented a significant challenge: there was no room to expand outward. To overcome this constraint, the project team took the work underground.
The solution includes installing a new ultraviolet disinfection system and chlorine contact basin approximately 65 feet below the surface. FlatironDragados is leading excavation and construction of the below-ground facilities, along with a two-story maintenance and UV electrical building above grade.
Read the full ASCE article here.