Transcontinental Gas Pipe Line Company, LLC submits supplemental information regarding the Rock Springs Expansion Project under CP14-504.

Federal Energy Regulatory Commission Attn: K. Bose, Secretary October 30, 2015 Page 3 Please direct any questions to the undersigned at (716) 857-7067 or by email at websterk@natfuel.com. Very truly yours, /s/ Kenneth Webster Kenneth Webster Enc. cc: Christine Allen - OEP Office of General Counsel tree clearing windows that may be imposed on the Project and to commence site work and access road construction. In support of this Amendment, Applicants submit the following: I. GENERAL It is respectfully requested that all Commission orders and correspondence, as well as pleadings and correspondence from other parties concerning this filing, be served upon the following: Kenneth Webster Janet R. Bayer Attorney Senior Regulatory Analyst National Fuel Gas Supply Corporation National Fuel Gas Supply Corporation 6363 Main Street 6363 Main Street Williamsville, New York 14221 Williamsville, New York 14221 Telephone No. (716) 857-7067 Telephone No. (716) 857-7429 Facsimile No. (716) 857-7206 Facsimile No. (716) 857-7206 websterk@natfuel.com jrbferc@natfuel.com II. BACKGROUND On March 17, 2015, Applicants submitted a Joint Abbreviated Application for a certificate of public convenience and necessity authorizing the construction and operation of facilities comprising their Northern Access 2016 Project, and for the requisite authorization to abandon certain related facilities (the Application). As part of the Application, Empire requested authorization to, among other things, construct and -2- 2. Empire (a) Pendleton Compressor Station (i) Location In the Application, Empire proposed to construct the Pendleton Compressor Station on a parcel adjacent to National Fuels existing Line XM-10 pipeline, off Aiken Road, in Pendleton, New York (the Aiken Road Site). As a result of an impasse between Empire and the landowner concerning the purchase of the Aiken Road Site, and concerns raised by community stakeholders as to the construction of the Pendleton Compressor Station at the Aiken Road Site, Empire committed to pursuing further alternative locations. On August 31, 2015, Empire secured an option to purchase an approximately 20-acre industrially-zoned parcel on Killian Road, in the Town of Pendleton, New York. Empire submits that the Killian Road Site is preferred from an environmental standpoint and also addresses various stakeholders concerns regarding the Aiken Road Site. As such, by way of this Amendment, Empire is formally revising its preferred Pendleton Compressor Station site from the Aiken Road Site to the Killian Road Site. A map depicting the updated Pendleton Compressor Station site is attached as part of Revised Exhibit F-1, Appendix 1-C. As discussed in detail in Section VI(D) herein, the updated location, as well as ...