Ronald L. Cook

Gas Transmission Northwest LLC operates gas transmission pipelines. It offers services which includes transportation, parking and lending of natural gas to both firm and interruptible. It operates two pipeline systems GTN pipeline system in the Pacific Northwest and North Baja Pipeline system. The company was founded in 1957 and is headquartered in Houston, TX.

TC Pipelines LP engages in natural gas pipelines business. It transports natural gas in Western, Midwestern, and Eastern United States. The company was founded in 1998 and is headquartered in Houston, TX.

NOVA Gas Transmission Ltd. operates as a natural gas gathering and transportation system. The company is headquartered in Calgary, Canada.

Columbia Pipeline Group, Inc. provides gas transportation and storage services. It operates interstate pipeline, gathering and processing assets. The firm offers services to local gas distribution companies and users of natural gas. The company is headquartered in Houston, TX.

Part of TC Energy Corp., TC Pipelines GP, Inc. provides investment services. The private company is based in Calgary, Canada. The CEOs of the Canadian company are Nathan A. Brown, Brandon M. Anderson.

Part of TC Energy Corp., TransCanada Energy Ltd. generates and distributes electricity. The private company is based in Calgary, Canada.

TransCanada Calibrations Ltd. operates as a measurement services organization that offers high pressure natural gas meter calibration and technical measurement assistance to corporations in the energy, transmission, distribution, and power generation sectors. Its services include high pressure meter calibration, low pressure meter proving, meter repair and upgrade, instrument calibration and repair, and transportation and customs management. The company is headquartered in Ile des Chenes, Canada.