Overview
Pacific Gas & Electric Dunnigan Substation is a gas distribution station in Dunnigan, California, serving the Yolo County area. It operates under US PHMSA pipeline safety regulations and DOT 49 CFR Part 192.
Pacific Gas & Electric Dunnigan Substation is a gas distribution station located at 1030 Road 88 in Dunnigan, California, within Yolo County. The facility is part of PG&E's natural gas distribution network, which delivers natural gas to residential, commercial, and industrial customers across Northern California. As a distribution substation, it regulates and meters gas flow from transmission pipelines to local distribution systems. The facility operates under the regulatory framework of the U.S. Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) and complies with 49 CFR Part 192, which governs gas pipeline safety. The station's NAICS codes (221122 for natural gas distribution and 221210 for natural gas transmission) reflect its role in both distribution and transmission activities. Typical gas distribution stations in California are designed to handle pressures up to 60 psi for downstream distribution, with safety features including pressure regulation, overpressure protection, and odorization. The Dunnigan substation plays a key role in supplying natural gas to the rural community of Dunnigan and surrounding areas in Yolo County. Its location along Road 88 provides access to major transportation routes for maintenance and emergency response. The facility supports local energy needs, including agricultural operations common in the region, and contributes to the reliability of PG&E's gas distribution network in Northern California.
Environmental context
The facility is situated in a rural agricultural area of Yolo County, with proximity to farmland and open spaces. Gas distribution stations like this one are typically designed with containment measures to prevent leaks and minimize environmental impact. The region experiences a Mediterranean climate with hot, dry summers and mild winters, which can affect pipeline integrity through soil expansion and contraction. Seismic activity in California is a relevant risk factor, requiring compliance with PHMSA's seismic design standards for gas facilities.
Frequently asked questions
The Pacific Gas & Electric Dunnigan Substation is located at 1030 Road 88, Dunnigan, California 95937, in Yolo County.
It is a gas distribution station that regulates and meters natural gas flow from transmission pipelines to local distribution systems, serving residential, commercial, and industrial customers in the Dunnigan area.
Gas distribution stations in California must comply with U.S. DOT PHMSA regulations under 49 CFR Part 192, which covers pipeline safety, design, construction, operation, and maintenance. State-specific requirements from the California Public Utilities Commission also apply.
The substation includes pressure regulation, overpressure protection, odorization, and leak detection systems. It undergoes regular inspections and maintenance per PHMSA requirements to ensure safe operation.
Gas distribution stations are critical for delivering natural gas from high-pressure transmission lines to lower-pressure distribution networks that serve end-users. They help maintain system pressure and ensure reliable gas supply to communities.
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