CCCSD Pump Station Phase 2A
For our long time client, Central Contra Costa Sanitary District, we are installing two new 12.4 MGD sewage pumping stations and the associated equipment in Martinez, CA. The work includes heavy civil, mechanical, electrical, instrumentation, and controls, and the installation of new PG&E services, demolition and decommissioning of the existing pump stations.
Gilroy WWTP Plant Expansion
South County Regional Wastewater Authority (SCRWA) manages the treatment of wastewater and also operates a recycled water facility to irrigate local parks, golf courses, landscape medians, agriculture and industrial uses. The expansion project expands the WWTP using membrane bioreactor (MBR) technology to increase the current capacity of 8.5 MGD to 11 MGD to accommodate planned […]
Salinas Valley Health Parking Structure
Salinas Valley Health has roots running back to 1953 when its hospital was first founded to service the Monterey County community. To provide more parking at the campus, Overaa expanded the existing parking garage. The design build project includes four levels of parking above a basement level containing support spaces and loading dock. The cast-in-place […]
CCCSD Mechanical & Concrete Renovations
Construction of a temporary bypass pump station plus renovations and replacement of failing mechanical equipment. This included renovations of sluice gates and primary sedimentation guide rails, and the repair of Fiberglass Reinforced Plastic (FRP) odor control equipment, crack repair, concrete coating and permeation grouting. The final design included 11 diesel driven pumps that required full […]
Columbine Station Improvements
San Jose Water Company’s existing Columbine Station reservoir, constructed in 1963, needed to be upgraded to enable the storage of potable water. Overaa demolished the existing basin and all its appurtenances and provided two pre-stressed concrete tanks to provide a storage capacity of 5.5 million gallons each.
Manteca TCP Mitigation Project
This ENR award-winning project in the Water/Environment Category included design and construction of the installation of Granular Activated Carbon (GAC) treatment systems to treat and remove 1,2,3 -Trichloropropane (TCP) from City of Manteca, CA, groundwater and associated improvements for five existing wells at four separate sites. Careful coordination of construction near and sometimes adjacent to […]
Marin Academy Aquatic Center
Replacement of an existing 90-year old pool on campus with a new 13-lane competitive swimming pool. Construction included an all-new support building to house locker rooms, shower and bathroom facilities, office space, mechanical equipment, plus delivery/storage areas. The Aquatic Center serves Marin Academy students, faculty, and staff in both athletic and academic endeavors while also […]
CCCSD Filter Plant & Clearwell Improvements
Modifications to a wet weather holding basin plus the construction two 3 million gallon recycled water storage tanks, an electrical substation, and a motor control center to allow a 54 MGD treatment plant to allocate more of its treated water for recycled water uses within the community. Scope also included rehabilitations to pump stations and […]
Contra Costa County Fire Station #86, Bay Point
Construction of the new 10,856 SF LEED Silver designed fire station station that replaced the existing Fire Station #86. The project was delivered 3-months early and features a new one-story structure that includes three apparatus bays, kitchen, dorm rooms, offices, restrooms, training, exercise, storage, day and dining rooms. Scope also included all associated HVAC, electrical, […]
Brentwood WWTP Expansion Phase II
Expansion of a wastewater treatment plant from 5 MGD to 10 MGD. Scope includes modifying existing wastewater treatment facilities and constructing new wastewater facilities, including process structure and buildings, roads, civil/site work, and landscaping.
