DTE Pipeline Co. began Tuesday began operation of its Bluestone Gathering pipeline system in Susquehanna County, PA. The southern portion of the pipeline connects gas production of Southwestern Energy to the Tennessee Gas Pipeline in Lenox Township, PA (see Shale Daily, July 6, 2011). The pipeline has a capacity of 275 million cubic feet per day. The remaining 32 miles of pipeline will interconnect with the Millennium Pipeline in Sanford, NY and should be completed in January, DTE said. Bluestone Gathering is being developed as the Bluestone Pipeline Co. of Pennsylvania LLC, Bluestone Gas Corp. of New York Inc. and Susquehanna Gathering Co. I LLC, all of which are subsidiaries of DTE Pipeline, an affiliate of DTE Energy. Bluestone is DTE’s first natural gas gathering project outside Michigan. DTE Pipeline also is a 40% owner of the Vector Pipeline, 26.25% owner of the Millennium Pipeline and 33% owner of the recently announced Nexus Gas Transmission System.