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Columbia Gas Transmission Modernization Program


TC Energy’s ongoing modernization of its Columbia Gas Transmission system consists of more than $2.5 billion in system enhancements. The work done under this program has led to improvements in reliability of service, integrity of assets and efficiency of operations—all while reducing emissions.

Consistent with TC Energy’s sustainability focus, our efforts to address greenhouse gas emissions on the Columbia system have resulted in 258,000 tonnes of total CO2 equivalent (CO2e) emissions avoided since this cycle of investment was initiated in 2013—equivalent to taking 56,000 cars off the road. Based on the work currently completed, it’s estimated that 57,000 tonnes of CO2e emissions will continually be avoided on an annual basis.

This trend is expected to continue over the next several years amid a proposed third phase of the modernization program.


$2.5 billion in system enhancements

Avoiding 57,000 tonnes of CO2e emissions per year

Third phase of program in the works

How are we regulated?

The Columbia Gas Transmission Modernization Program 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

If you have any questions about the Project, please reach out to us via the contact information below. 

Main Office

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 stakeholders: Tribal groups, 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)