Boardwalk Announces Sale of 900,000 Additional Common Units.

OWENSBORO, Ky. -- Boardwalk Pipeline Partners, L.P. (NYSE:BWP) today announced that the underwriters of its recent equity offering have exercised their option to purchase an additional 900,000 common units. This sale is part of the Partnership's equity offering that was priced on November 16, 2006 and is at the offering price to the public of $29.65 per common unit. The underwriters had a 30-day option to purchase up to 900,000 additional common units.

The Partnership plans to use the proceeds from this offering to fund a portion of the cost of its expansion projects.

Citigroup Global Markets Inc., Lehman Brothers Inc. and UBS Securities LLC acted as joint book-running managers for the offering. Co-managers for the offering were Morgan Stanley & Co. Incorporated, Wachovia Capital Markets, LLC, A.G. Edwards & Sons, Inc. and Raymond James & Associates, Inc.

A copy of the final prospectus supplement and base prospectus relating to this offering can be obtained from Citigroup Global Markets Inc., Prospectus Department, Brooklyn Army Terminal, 140 58th Street, 8th floor, Brooklyn, N.Y., 11220, [phone], fax [phone]; Lehman Brothers Inc., c/o ADP Financial Services, Prospectus Fulfillment, 1155 Long Island Avenue, Edgewood, NY 11717, Email: [e-mail], Fax: [phone] or from UBS Securities LLC, Prospectus Department, 299 Park Avenue, New York, N.Y., 10171, [phone].

Boardwalk Pipeline Partners, LP is a master limited partnership engaged through its subsidiaries, Texas Gas Transmission, LLC and Gulf South Pipeline Company, LP, in the interstate transportation and storage of natural gas. Boardwalk's two interstate natural gas pipeline systems have approximately 13,470 miles of pipeline and underground storage fields with aggregate working gas capacity of approximately 146 Bcf.

This press release contains forward-looking statements relating to expectations, plans or prospects for Boardwalk Pipeline Partners, LP and its subsidiaries. These statements are based upon the current expectations and beliefs of management and are subject to certain risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. These risks and uncertainties include market conditions and other factors beyond the company's control and the risk factors and other cautionary statements discussed in Boardwalk Pipeline Partner, LP's filings with the U.S. Securities and Exchange Commission.