Crews at the Upper San Leandro Water Treatment Plant are advancing a major reliability upgrade by replacing a nearly 100-year-old chlorine contact basin with a new concrete prestressed water tank.
A key milestone is the engineering and construction of a 165-foot-diameter compression ring — among the largest in the world. The ring anchors excavation and shoring on a confined site bordered by existing utilities and structures, requiring significant structural components and 35 preloaded bracing connections to stabilize crane loads during construction.
Work has progressed beyond the demolished slab, and the over-excavation and foundation installation are complete. Once the crews complete new piping under the tank foundation, they will begin constructing the new tank, which will bolster long-term water system reliability for the community.
Hear from Assistant Project Manager Danny Walsh and Project Engineer Mauricio Rosales as they share more about the complexities of this project.
