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Williams Partners in Exclusive Negotiations to Acquire Delphi Midstream Partners' Laser Gathering Businesses in Marcellus Shale

The memorandum and agreement involves Williams Partners' potential acquisition of Delphi subsidiaries that own Delphi's midstream assets, including the Laser Gathering System, comprised of 33 miles of 16-inch natural gas pipeline and associated gathering facilities in Susquehanna County, Penn., as well as 10 miles of gathering pipeline in southern New York. The proposed deal also includes Delphi's Mansfield Gathering System, which consists of 19 miles of pipeline in the Barnett Shale near Fort Worth, Texas.

In anticipation of a successful transaction, Williams Partners has made relevant regulatory filings, including a Hart-Scott-Rodino notification. Both parties expect to close quickly following receipt of all regulatory approvals and the signing of definitive agreements.

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 14 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 75 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=630&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 partnership 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 partnership's annual reports filed with the Securities and Exchange Commission.

    MEDIA CONTACT:                  INVESTOR CONTACT:
    Julie Gentz                     Sharna Reingold
    (918) 573-3053                  (918) 573-2078

SOURCE Williams Partners