Iroquois Gas Transmission System, L.P. is a partnership of affiliates of five U.S. and Canadian energy companies, and is owner of a 411-mile interstate natural gas pipeline extending from the U.S.-Canadian border at Waddington, NY through western Connecticut to its terminus in Commack, NY, and from Huntington to the Bronx. Its wholly owned subsidiary, the Iroquois Pipeline Operating Company, headquartered in Shelton, Connecticut, is the agent for and operator of the pipeline.