Spectra Energy Partners, LP, through its subsidiaries, is engaged in the transportation and gathering of natural gas through interstate pipeline systems with over 3,200 miles of pipelines that serve the southeastern quadrant of the United States and the storage of natural gas in underground facilities with aggregate working gas storage capacity of approximately 57 billion cubic feet that are located in southeast Texas, south central Louisiana and southwest Virginia. The Company transports, gathers and stores natural gas for a range of customers, including local gas distribution companies (LDC), municipal utilities, interstate and intrastate pipelines, direct industrial users, electric power generators, marketers and producers, and exploration and production companies. Effective August 2, 2013, Spectra Energy Partners LP, a 61%-owned unit of Spectra Energy Corp, acquired a 50% interest in Express-Platte Pipeline System, a wholly owned unit of Spectra Energy Corp.