John Jones Water Treatment Plant Expansion
Expansion to an existing water treatment plant to reduce the City of Tracy’s reliance on well water as the source for their drinking water and to increase plant capacity to 30 MGD – almost double its previous size. Improvements included a new high rate flocculation/ sedimentation tank, new traditional GAC Filters and modifications to existing […]
Tamalpais High School
Construction and modernization of an existing high school campus. Overaa removed the existing pools and constructed a new swimming pool with a mechanical building. A new site glass elevator tower for accessibility on the mountainous site, a weight room and field house buildings, tennis courts, a basketball court, parking lot, and a student drop off […]
Las Positas College Center for the Performing Arts
New three-story LEED Silver facility with a 500 seat main theater designed by renowned designer of performing arts theater projects, John Sergio Fisher. Scope included a 150 seat black box theater and a 1,500 seat outdoor below grade amphitheater. The main audience chamber/stage is complete with a tension grid, catwalks, and grid iron deck. The […]
University of California, Berkeley – Memorial Stadium Seismic Retrofit
Seismic retrofits for historic century old stadium built directly on top of the Hayward Fault line. Scope included reinforcing the concrete scoreboard towers; a system of steel shores to support the existing concrete “bowl” of the stadium; a design-build system of egress protection; and miscellaneous architectural work. Overaa also provided steel light pole supports and […]
EBMUD Richmond Advanced Recycled Expansion
Construction of a 4 MGD microfiltration and reverse osmosis treatment facility to double the amount of reclaimed water that the Chevron Richmond, CA refinery can use on a daily basis. Scope included a 1 MG influent storage tank, 15,000 SF process equipment building, chemical storage and feed systems, 2 MG stainless steel product water storage […]
Berlex Biosciences
This occupied biotech project required building 12 new class 100 clean rooms and 4 new class 10,000 clean rooms. The 3-story, 73,000sf building included laboratories for a pharmaceutical pilot plant, a separate poured-in-place concrete structure to process hazardous waste, warehousing, tank storage and containment, and offices. Construction included a secondary containment system, special coating, exhaust […]
Havens Elementary School – Ellen Driscoll Playhouse
Complete seismic upgrade and interior remodel of an existing playhouse. Scope included the protection of existing historic finishes, additional structural wood framing and concrete foundation for seismic improvements, new roof and fire sprinkler system, and a complete overhaul of interior finishes. We self-performed the extensive wood framing improvements, which was key to making the schedule […]
Sutter Health Alta Bates Summit Medical Center Parking Structure
Design and construction of a 393,000 SF cast-in-place parking structure in a congested urban environment. The seven-level facility was built on an existing on-grade parking lot in the heart of an operating hospital campus. A multi-story hospital was also being built concurrently on-site. Careful coordination with Sutter Health services and adjacent contractors was required. The […]
Hollister Wastewater Treatment Plant
Construction of a complete 10 MGD wastewater treatment plant from pretreatment through disinfection anchored by a Zeenon Membrane Bioreactor. Additional plant improvements included ground consolidation through the installation of over 250 geo piers, an 8,000 SF operations building, new RTU’s, and SCADA Systems. We self-performed cast-in-place reinforced concrete hydraulic structure with concrete quantities in excess […]
University of California, Berkeley – Underhill Parking & Athletic Field
Design and construction of a 380,000 SF pre-cast hybrid parking facility featuring a roof-level recreation field. The structure fits in seamlessly with and acts as a social hub for the adjacent student housing and private apartments. The four parking levels are either partially or completely below grade. As the site slopes downward, the facility emerges […]
