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Central Valley Gas Storage Operations

About: Central Valley Gas Storage, LLC, (CVGS) is a wholly owned subsidiary of Southern Company Gas, through support and management provided by Pivotal Energy Development, is a market area natural gas storage facility in the Sacramento River valley of north-central California. Located in the town of Princeton, California, the facility interconnects with the natural gas transmission system of Pacific Gas and Electric. We are a high deliverability depleted reservoir that provides multi-turn services tailored to customers' requirements.

Capacity: Central Valley obtained CPUC certification to convert the depleted Princeton Gas Field into a high-deliverability, multi-cycle storage field. Central Valley developed the field to provide up to 11 Bcf of working gas capacity. The field has a maximum withdrawal and injection capability of up to 300 million standard cubic feet per day (MMscfd).

Convenience: Depleted reservoir storage utilizes a depleted underground natural gas reservoir that originally contained oil and/or gas. Gas is injected back into the depleted reservoir in order to re-fill the reservoir. The withdrawal process for the gas in storage normally replicates the process originally used to produce gas from the reservoir in the first place. The conversion of a depleted gas reservoir for storage use traditionally involves drilling many new wells that enables a more rapid withdrawal of gas than was originally used to deplete the reservoir.

Only 13.5 percent of the natural gas California uses comes from in-state production. The remainder is delivered by pipeline from several production areas in the western United States and Canada. Once the gas arrives in California, it is distributed by the state's three major gas utilities. Central Valley will be connected to PG&E's transmission system. The connection with PG&E provides Central Valley customers with access to Alberta, Rockies, San Juan, and Permian gas supply through the many pipelines that tie into PG&E. Central Valley also has access to potential supplies from new LNG facilities being developed on the West Coast.

Services: Central Valley can provide various services under its intrastate jurisdictional tariff on behalf of shippers. Depending on its customer requirements, CVGS can provide the following services:

  • Firm and Interruptible storage services
  • Provide injection, withdraw, park and loan, and dome swap services to our customers

Central Valley has direct connection to the highly liquid trading point known as the PGE Citygate Pool through its physical connection to the PG&E Line 400/401.  Customers doing business at Central Valley can execute at the PG&E Citygate pool without additional cost to or from PG&E when contracting with Central Valley.

Emergency Information

How to recognize a natural gas leak

LOOK for blowing dirt, discolored vegetation or continued bubbling in standing water. 

LISTEN for a hissing or roaring noise of natural gas escaping. 

SMELL for the distinctive “rotten-egg” odor associated with natural gas. Natural gas is colorless and odorless, so we add a chemical odorant called mercaptan for easy detection. This odorant has a distinctive “rotten-egg” type odor. You should act any time you detect even a small amount of this odor in the air. 

Note: Do not solely rely on the sense of smell. Be aware that some individuals may not be able to detect the odorant because they have a diminished sense of smell, olfactory fatigue, or because the odor is being masked by other odors in the area. Certain conditions may cause the odorant to diminish so that it is not detectable. Some gas lines, due to their unique function, may not have odor at all.

Help keep everyone safe during a natural gas emergency 

Even though natural gas pipeline incidents are uncommon, it is still important to be prepared by knowing the signs of a potential problem.  

Here are a few suggestions to ensure your safety and the safety of those in the area if a natural gas leak is suspected or detected: 

DO NOT attempt to stop the flow of natural gas, operate any pipeline valves or repair the leak yourself.  

AVOID using any sources of ignition, such as cellphones, cigarettes, matches, flashlights, electronic devices and motorized vehicles until you are a safe distance away from the potential leak, as natural gas can ignite from a spark or open flame, possibly causing a fire or explosion. 

CALL Central Valley Gas Storage at 855.303.2847 with the location and type of emergency.  

SECURE the area by establishing a safety zone around the incident and control access. You may need to reroute traffic and evacuate area homes and businesses.

Safety Precautions

Central Valley Gas Storage, a wholly-owned subsidiary of Southern Company Gas, through support and management provided by Pivotal Energy Development owns and operates a depleted reservoir natural gas storage field located in Princeton, California. 

With safety being our highest priority, we adhere to federal and state pipeline safety regulations, perform quality control checks, educate the public on natural gas leak recognition and prevention, and work closely with emergency responders and public officials to develop emergency response plans.

Each year, we send important safety communications, offer training and meet with emergency responders to share information and discuss natural gas incident response and safety.

Call 811 Before You Dig

Every day, natural gas is delivered safely and efficiently to millions of U.S. businesses and homes through more than 2 million miles of underground pipelines. Even though natural gas pipeline incidents are uncommon, the biggest threat to pipelines is excavation activity, and an accident can have severe consequences. Excavation work, including digging or plowing around a home or business, is the most common cause of natural gas emergencies. Even damaging a small pipeline can lead to a fire or explosion.

Always call 811 and wait the required amount of time, as advised by California 811, before digging. Taking such action will notify the appropriate utility companies of your intent to dig so that professional locators can be sent, free of charge, to your job site to mark the approximate locations of underground lines with flags and/or spray paint. Once all lines have been marked, it is important to respect the marks and use the appropriate tools to dig with care.

Remember, pipeline markers, like the example pictured, indicate only the general area of the pipeline and not the exact location or depth. Pipeline markers may not be present in all areas.  

Information about transmission pipelines operating in your community is available through the National Pipeline Mapping System (NPMS) and available online at

Pipeline integrity management is a process for assessing and mitigating pipeline risks to reduce both the likelihood and consequences of incidents. We have a comprehensive plan that fully addresses these processes, especially for locations deemed high-consequence areas. 


If you are located in the Greater Houston area, please contact:

Pivotal Energy Development
Two Allen Center
1200 Smith Street
Houston, TX 77002
Phone: 832.390.2967
Fax: 832.397.3713

If you are located in the Greater Chicago area, please contact:

Pivotal Energy Development
3333 Warrenville Road
Suite 300
Lisle, IL 60532
Phone: 630.245.7800
Fax: 630.245.7835