Key Capital Projects

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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.

Key Capital Projects


  • East County Bioenergy Project, Project No. 16117

The District and Contra Costa Waste Service, Inc., dba Mt. Diablo Resource Recovery (MDRR), a Garaventa Company, have partnered to develop the East County Bioenergy Project for the purposes of maximizing the energy potential of existing biomass resources (biosolids, wood waste, and food waste) and to reduce greenhouse gas (GHG) emissions over current management practices. The project has the potential to produce alternative vehicle fuels or enough electricity to serve both facilities with excess power exported to the grid.  Other benefits include production of fertilizer products, diverting organic waste from landfills, providing a long-term sustainable solution for biosolids and organics management, and serving as a model for other resource recovery facilities across California and the United States.

Point of Contact:  Phil Govea, District Engineer, (925) 756-1928

Planning/Permitting Schedule:  July 2016 – March 2018

Design Schedule:  June 2017 - July 2018

Construction/Start-Up Schedule:  August 2018 - December 2019

  • Headwork Improvements, Project No. 17117 

This project includes design and construction of replacement headworks and grit removal facilities at the District wastewater treatment plant.   The existing headworks and grit removal are near the operating capacity and are nearing the end of their service life.  Replacement is needed to increase operational reliability and handle buildout flows.

Point of Contact:  Patricia Chapman, Associate Engineer, (925) 756-1939

Design Schedule:  September 2017 - September 2018

Construction Schedule:  2018 – 2020

Project Status:  In Progress


  • Treatment Plant Switchgear Replacement 

The switchgear system distributes utility and back-up emergency power to the entire 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.  The design work was awarded to LEE & RO, Inc.  LEE & RO will assist staff with design and bid documents preparation, CEQA documentation, and cost estimating.  Design is anticipated to be completed at the end of 2018.

Point of contact:  Irene O’Sullivan, Associate Engineer, (925) 756-1917

Bid Schedule:  January 2019

Project Status:  In Progress


  • Resource Recovery Facility Condition Assessment, Project No. 18121 

This project will provide for field inspection and evaluation of the District's conveyance pipelines and related structures; development of a prioritization plan for replacement/rehabilitation/maintenance for an additional 30-year useful life; and development of a model for risk and consequence of failure analysis.

Point of contact:  Irene O’Sullivan, Associate Engineer, (925) 756-1917

Planning Schedule:  March 2018 - March 2019

Project Status:  Under Contract


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