In Thursday's article Marcellus Gas Needs a Western Market, REX Executive Says (see Shale Daily, Jan. 30), NGI that Rockies Express Pipeline LLC is owned solely by Tallgrass Energy Partners LP. Tallgrass owns a 50% interest in and operates the pipeline, while Sempra U.S. Gas & Power and Phillips 66 each own a 25% interest in the pipeline. NGI regrets the error.