Williams Partners’ Transco Initiates Private Debt Issuance

TULSA, Okla.–(BUSINESS WIRE)–Transcontinental Gas Pipe Line Company, LLC (“Transco”), a wholly owned
subsidiary of Williams Partners L.P. (NYSE: WPZ), announced today that
it is offering senior notes due 2028 and senior notes due 2048 to
certain institutional investors. The notes will be offered pursuant to
certain exemptions from registration under the Securities Act of 1933,
as amended (the “Securities Act”).

Transco intends to use the net proceeds from the offering to repay
indebtedness, including Transco’s $250 million of 6.05% senior notes due
2018 upon their maturity on June 15, 2018, and for general corporate
purposes, including the funding of capital expenditures.

The offering of the notes has not been registered under the Securities
Act or applicable state securities laws. The notes may not be offered or
sold in the United States absent registration or an applicable exemption
from such registration requirements.

This press release is for informational purposes only and does not
constitute an offer to sell or a solicitation of an offer to buy the
notes described in this press release, nor shall there be any sale of
the notes in any state or jurisdiction in which such an offer, sale or
solicitation would be unlawful prior to registration or qualification
under the securities laws of such jurisdiction.

About Williams Partners

Williams Partners is an industry-leading, large-cap natural gas
infrastructure master limited partnership with a strong growth outlook
and major positions in key U.S. supply basins. Williams Partners has
operations across the natural gas value chain including gathering,
processing and interstate transportation of natural gas and natural gas
liquids. Williams Partners owns and operates more than 33,000 miles of
pipelines system wide – including the nation’s largest volume and
fastest growing pipeline – providing natural gas for clean-power
generation, heating and industrial use. Williams Partners’ operations
touch approximately 30 percent of U.S. natural gas. Tulsa, Okla.-based
Williams (NYSE: WMB), a premier provider of large-scale U.S. natural gas
infrastructure, owns approximately 74 percent of Williams Partners.

Portions of this document may constitute “forward-looking statements”
as defined by federal law. Although Transco believes any such statements
are based on reasonable assumptions, there is no assurance that actual
outcomes will not be materially different. Additional information about
issues that could lead to material changes in performance is contained
in Transco’s annual and quarterly reports filed with the Securities and
Exchange Commission.

Contacts

Williams Partners L.P.
Media Contact:
Keith Isbell,
918-573-7308
or
Investor Contact:
Brett Krieg,
918-573-4614