Pacific Gas & Electric Company's Delta DPA Capacity Increase Substation Project

(Application A.05-08-022, filed August 12, 2005)

Welcome to the California Public Utilities Commission (CPUC) website for the California Environmental Quality Act (CEQA) review of Pacific Gas and Electric's (PG&E) proposed Delta DPA Capacity Increase Substation Project (Delta Substation). An application for this project was submitted to the CPUC on August 12, 2005 (A.05-08-022) and a Certification of Public Convenience and Necessity (CPCN) was granted by CPUC on March 1, 2007. This site provides access to public documents and information relevant to the CEQA review process.


PG&E filed an application with the CPUC to build a new three-bank 230/21 kV distribution substation on a 5.1-acre site in the City of Antioch in eastern Contra Costa County. In addition, the Proposed Project would include a new transmission tower in an existing transmission right of way and a new paved access road from the intersection of Heidorn Ranch Road and Sand Creek Road to the proposed substation site. The temporary access road would require a temporary bridge over Sand Creek. PG&E's project objective is to improve reliability and meet projected electrical load requirements in the Delta Distribution Planning Area (DPA), which includes the rapidly growing southern and eastern portion of Antioch, the cities of Brentwood and Oakley, and much of the remainder of unincorporated eastern Contra Costa County.

Proponent's Environmental Assessment (PEA)

PG&E filed a PEA with the Application in August 2005. This document provided a starting point for the environmental review process conducted by the CPUC.

Environmental Review Process

The CPUC on September 22, 2006, released a Notice of Intent to Adopt a Mitigated Negative Declaration (MND) for the Delta Substation Project, showing that the Proposed Project, as mitigated, would not have any significant effects on the environment. Public comments on the MND were accepted for 30 days until October 23, 2006. The CPUC on November 28, 2006 released a Final MND incorporating responses to the public comments. On March 1, 2007, the CPUC granted a Certification of Public Convenience and Necessity (CPCN) for the project

Construction of the project began on September 10, 2007, after a Notice to Proceed with Construction was granted by CPUC on August 30, 2007. A CPUC Environmental Monitor is monitoring construction activities to ensure that they are conducted in accordance with the approved mitigation measures and permit conditions. This site holds all weekly reports documenting this monitoring activity.

For Additional Information

General questions pertaining to CPUC Environmental Information should be addressed to the Environmental Review Team:

Phone: (415) 703-2126
Fax: (415) 703-2200

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