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Key Capital Projects

Delta Diablo (District) prioritizes the repair and replacement of its equipment and facilities via a comprehensive Capital Improvement Program (CIP).  This reflects strong fiscal responsibility ensuring successful, long-term rehabilitation of our infrastructure and investment of ratepayer funds to provide essential community wastewater services to residents and businesses in Antioch, Bay Point, and Pittsburg.

Resource Recovery Facility Master Plan

The District completed a Resource Recovery Facility Master Plan (RRFMP) in 2022 to provide the District with a strategic planning document focused on near- and long-term infrastructure improvements to address asset condition, hydraulic capacity, treatment capacity, and regulatory requirements. The RRFMP evaluated components of the District’s Wastewater Treatment Plant (WWTP), Recycled Water Facility (RWF), and supporting infrastructure. The RRFMP is intended to provide the District with an integrated and strategic guidance document with in-depth analysis in key areas to guide significant infrastructure investment decisions in the near and long term. The RRFMP is an “action-oriented” document that highlights specific measures and triggers that support decision making over the next few years, while maintaining a 20-year planning horizon.

Point of Contact:  Brian Thomas, Acting Business Services Director/District Engineer,

Project Status: Complete

Treatment Plant Switchgear Replacement 

The switchgear system distributes utility and back-up emergency power to the Wastewater Treatment Plant, Treatment Plant building, and Household Hazardous Waste Facility. The existing Treatment Plant switchgear is nearing the end of its useful life and requires replacement.

Point of contact:  Sean Williams, Acting Senior Engineer, 

Project Status: Under construction