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Columbia Gas Transmission


Acquired by TC Energy in 2016, the Columbia Gas Transmission system extends from New York state to the Midwest and Southeast, serving as a link between major natural gas basins and major markets. Thanks to the network’s 11,899 miles (18,768 km) of pipeline and dozens of storage fields in multiple states, Columbia Gas Transmission ensures the heat stays on and businesses stay powered, even when demand spikes.

For commercial information, visit ebb.tceconnects.com/infopost/.

11,899 mile
(18,768 km)
pipeline network

Covers 10 states

Delivers natural gas across U.S. East, Midwest and Southeast


Documents and maps

Maryland public postings

Request Blowdown Notice

Please fill out the form below if you would like to receive email notifications for instances when information related to blowdowns greater than 1 Million standard cubic feet is uploaded on the website, per COMAR


How are we regulated?

Columbia Gas Transmission is governed according to regulations outlined by the U.S. Federal Energy Regulatory Commission (FERC).

Federal Energy Regulatory Commission (FERC)
Local 1-202-502-6088
Toll-Free 1-866-208-3372



Ways to reach us

We’re here to answer your questions. For general questions you can contact us by email, but for a quicker response, please call us directly.

Columbia Gas Transmission (TC Energy)


700 Louisiana Street
Houston, Texas 77002


Emergency Response
Our commitment to the safety of our pipelines and facilities is unwavering. In case of an emergency, visit our Contact page for our complete list of emergency numbers. 
Landowner Helpline
A key component in maintaining the integrity of our facilities is input from all stakeholders: Indigenous communities, landowners and governments. If you have questions or concerns, please let us know.

Head Office
700 Louisiana Street
Houston, Texas 77002

Media Relations
TC Energy welcomes enquiries from media. Please direct questions to:
1-800-608-7859 Toll-free (North America)
Investor Relations
We welcome inquiries from analysts, shareholders and prospective shareholders at: 
1-800-361-6522 Toll-free (North America)