Boardwalk Announces Exercise Of Option By Underwriters To Purchase Additional Common Units

Boardwalk Pipeline Partners, LP (NYSE: BWP) (the “Partnership") today announced that the underwriters of its previously announced public offering of 8,000,000 common units, which closed on January 25, 2012, have exercised their option to purchase an additional 1,200,000 common units. The Partnership expects the purchase of additional common units to close on February 9, 2012.

The total net proceeds from the offering of 9,200,000 common units, after deducting offering expenses, will be approximately $250.2 million in the aggregate, including the general partner's proportionate capital contribution of approximately $5.2 million. The Partnership expects to use the net proceeds from the offering, together with amounts to be contributed by its general partner to maintain its 2% general partner interest, to repay borrowings outstanding under the Partnership’s revolving credit facility, but the Partnership may use some or all of the proceeds for other general partnership purposes, which may include acquiring additional equity interests in Boardwalk HP Storage Company, LLC, a joint venture between the Partnership and Boardwalk Pipelines Holding Corp., an affiliate of the Partnership’s general partner.

Barclays Capital, BofA Merrill Lynch, Citigroup, J.P. Morgan, UBS Investment Bank and Wells Fargo Securities acted as joint book-running managers for the common unit offering.

A copy of the prospectus relating to this offering may be obtained from:

• Barclays Capital, c/o Broadridge Financial Solutions, 1155 Long Island Ave., Edgewood, NY 11717. By telephone at [phone] or by email at [e-mail];
• BofA Merrill Lynch, Attn: Preliminary Prospectus Department, 4 World Financial Center, New York, NY 10080, or email at [e-mail];
• Citigroup, Brooklyn Army Terminal, 140 58th Street, 8th floor, Brooklyn, NY 11220, Attn: Prospectus Dept. By telephone at [phone] or by email at [e-mail];
• J.P. Morgan, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717. By telephone at [phone];
• UBS Investment Bank, Attn: Prospectus Department, 299 Park Avenue, New York, NY 10171. By telephone at (888)-827-7275; or
• Wells Fargo Securities, Attn: Equity Syndicate Dept., 375 Park Avenue, New York, NY 10152. By telephone at [phone] or by email at [e-mail].

This press release does not constitute an offer to sell or a solicitation of an offer to buy any securities nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. The offer is being made only through the prospectus supplement and accompanying base prospectus, which is part of a registration statement that became effective on April 29, 2010.