Mark W. Billeigh

Transcontinental Gas Pipe Line Co. LLC is an interstate natural gas transmission company, which owns a natural gas pipeline system extending from Texas, Louisiana, Mississippi and the Gulf of Mexico through Alabama, Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania and New Jersey to the New York City metropolitan area. Its customers include public utilities and municipalities that provide service to residential, commercial, industrial and electric generation end users. The company was founded on October 5, 1948 and is headquartered in Houston, TX.

Northwest Pipeline LLC owns and operates an interstate pipeline system for the mainline transmission of natural gas. It provides natural gas transportation services for markets in Washington, Oregon, Idaho, Wyoming, Nevada, Utah, Colorado, New Mexico, California and Arizona, either directly or indirectly through interconnections with other pipelines. The company was founded in 1965 and is headquartered in Salt Lake City, UT.