Iroquois Gas Transmission System, L.P. is a partnership of ten U.S. and Canadian energy entities, and is owner of a 377-mile interstate natural gas pipeline extending from the U.S.-Canadian border at Waddington, N.Y. through western Connecticut to Long Island, N.Y. Its wholly-owned subsidiary, the Iroquois Pipeline Operating Company, headquartered in Shelton, Connecticut, is the agent for and operator of the pipeline.