Williams Partners L.P. Announces Extension of Exchange Offer

TULSA, Okla. June 30 /PRNewswire-FirstCall/ -- Williams Partners L.P. (NYSE: WPZ) announced today that it has extended its offer to exchange all of its privately placed outstanding 3.8-percent Senior Notes due 2015, 5.25-percent Senior Notes due 2020 and 6.3-percent Senior Notes due 2040 for like principal amounts of newly registered 3.8-percent Senior Notes due 2015, 5.25-percent Senior Notes due 2020 and 6.3-percent Senior Notes due 2040, respectively, until 5 p.m. New York City time on Friday, July 2, 2010.  The offer was previously scheduled to expire at 5 p.m. New York City time on June 29, 2010.  Except as set forth herein, the terms and conditions of the offer remain unchanged. Williams Partners may further extend the expiration date of the offer in its sole discretion.

As of 5 p.m. New York City time on Tuesday, June 29, 2010, holders of $749,940,000 aggregate principal amount of the outstanding 3.8-percent Senior Notes due 2015 (constituting approximately 99.99 percent of the principal amount of such outstanding notes), $1,497,835,000 aggregate principal amount of the outstanding 5.25-percent Senior Notes due 2020 (constituting approximately 99.86 percent of the principal amount of such outstanding notes), and $1,249,700,000 aggregate principal amount of the outstanding 6.3-percent Senior Notes due 2040 (constituting approximately 99.98 percent of the principal amount of such outstanding notes), have delivered valid tenders or notices of guaranteed delivery pursuant to the offer.

The offer is being made pursuant to a prospectus dated June 1, 2010. Copies of the exchange offer prospectus and related transmittal materials governing the exchange offer are available from the exchange agent for the offer, The Bank of New York Mellon Trust Company, N.A., at:

This press release does not constitute an offer to sell or solicitation of an offer to buy such securities.

About Williams Partners L.P. (NYSE: WPZ)

Williams Partners L.P. is a leading diversified master limited partnership focused on natural gas transportation; gathering, treating, and processing; storage; natural gas liquid (NGL) fractionation; and oil transportation. The partnership owns interests in three major interstate natural gas pipelines that, combined, deliver 12 percent of the natural gas consumed in the United States. The partnership's gathering and processing assets include large-scale operations in the U.S. Rocky Mountains and both onshore and offshore along the Gulf of Mexico. Williams (NYSE: WMB) owns approximately 84 percent of Williams Partners, including the general-partner interest. More information is available at www.williamslp.com. Go to http://www.b2i.us/irpass.asp?BzID=1296&to=ea&s=0 or http://www.b2i.us/irpass.asp?BzID=1296&to=ea&s=0 to join our email list.

Portions of this document may constitute "forward-looking statements" as defined by federal law. Although the company believes any such statements are based on reasonable assumptions, there is no assurance that actual outcomes will not be materially different. Any such statements are made in reliance on the "safe harbor" protections provided under the Private Securities Reform Act of 1995. Additional information about issues that could lead to material changes in performance is contained in the company's annual reports filed with the Securities and Exchange Commission.

SOURCE Williams Partners L.P.