Williams (NYSE: WMB) announced today that Transco has filed an application with the Federal Energy Regulatory Commission (FERC) to expand its pipeline system to serve the growing need for natural gas by electric generators, natural gas distributors and end-users in the southeastern United States.

The Hillabee Expansion Project is designed to expand the existing Transco pipeline's capacity in Alabama beginning in May 2017, providing incremental firm capacity from certain receipt points located at Transco's Station 85 in Choctaw County, Ala. to a proposed point of interconnection between Transco and the Sabal Trail pipeline in Tallapoosa County, Ala. Sabal Trail will acquire by lease 100 percent of such capacity on a long-term basis.

To be constructed in three phases, the proposed Hillabee Expansion would add a total of approximately 1.13 million dekatherms per day of pipeline capacity to the Transco system by May 2021. That's enough natural gas to meet the needs of more than 4 million American homes annually.

The proposal involves the construction of approximately 43 miles of additional pipe segments (called loops) in Alabama, a new compressor facility in Choctaw County, Ala., as well as modifications to other existing compressor stations and valve sites.

"By maximizing the use of our existing transmission corridor, our goal is to minimize the impact on property owners and the environment while serving the growing demand for natural gas in the southeast," said Frank Ferazzi, Vice President & General Manager of Williams' Transco pipeline. "The Hillabee project is yet another incremental expansion to the Transco system to better connect the growing supply of North American natural gas with the best markets."

The Hillabee Expansion project is part of the $4.5 billion in capital expenditures planned through 2017 on Transco growth projects. Transco is the nation's largest and fastest-growing interstate natural gas transmission pipeline system. It delivers natural gas to customers through its 10,200-mile pipeline network whose mainline extends nearly 1,800 miles between South Texas and New York City. The system is a major provider of cost-effective natural gas services that reach U.S. markets in 12 Southeast and Atlantic Seaboard states, including major metropolitan areas in New York, New Jersey and Pennsylvania.

Transco is a wholly owned subsidiary of Williams Partners L.P. (NYSE: WPZ), of which Williams owns controlling interests and is the general partner.

About Williams

Williams, headquartered in Tulsa, Okla., is one of the leading energy infrastructure companies in North America. It owns controlling interests in both Williams Partners L.P. and Access Midstream Partners, L.P. through its ownership of 100 percent of the general partner of each partnership. Additionally, Williams owns approximately 66 percent and 50 percent of the limited partner units of Williams Partners L.P. and Access Midstream Partners, L.P., respectively.

Williams Partners L.P. owns and operates both on-shore and off-shore assets of approximately 15,000 miles of natural gas gathering and transmission pipelines, 1,800 miles of NGL transportation pipelines, an additional 11,000 miles of oil and gas gathering pipelines and numerous other energy infrastructure assets. The partnership's operated facilities have daily gas gathering capacity of approximately 11 billion cubic feet, processing capacity of approximately 7 billion cubic feet, NGL production of more than 400,000 barrels per day and domestic olefins production capacity of 1.95 billion pounds of ethylene and 114 million pounds of propylene per year.

Access Midstream Partners, L.P. owns and operates natural gas midstream assets across nine states, with an average net throughput of approximately 4.13 billion cubic feet per day and more than 6,773 miles of natural gas gathering pipelines. Headquartered in Oklahoma City, the partnership's operations are focused on the Barnett, Eagle Ford, Haynesville, Marcellus, Niobrara and Utica Shales and the Mid-Continent region of the U.S.

For more information about Williams, Williams Partners and Access Midstream Partners, visit www.williams.com, www.williamslp.com and www.accessmidstream.com.

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.

Williams
Media Contact:
Tom Droege, 918-573-4034
or
Investor Contacts:
John Porter, 918-573-0797
or
Sharna Reingold, 918-573-2078

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