Spectra Energy Partners, LP is engaged in the transmission, storage and gathering of natural gas, the transportation and storage of crude oil, and the transportation of natural gas liquids (NGLs). The Company owns and operates natural gas transmission, gathering and storage assets, and crude oil transportation and storage assets, in central, southern and eastern United States as well as western Canada. The Company has interstate pipeline systems with over 17,000 miles of transmission and transportation pipelines and the storage of natural gas in underground facilities with aggregate working gas storage capacity of approximately 164 billion cubic feet in the United States. The Company customers include local gas distribution companies, municipal utilities, interstate and intrastate pipelines, industrial users, electric power generators, marketers and producers, and exploration and production companies. The Company operates its business in two segments: U.S. Transmission and Liquids.