Williams Partners Announces FERC Approval of Transco Expansion Projects in New York City and Virginia

• The New York Bay Expansion will deliver additional natural gas to New York City during the fourth quarter of 2017
• The Virginia Southside II Expansion will deliver additional natural gas to southern Virginia during the fourth quarter of 2017

Williams Partners L.P. (NYSE: WPZ) today announced that the Federal Energy Regulatory Commission (FERC) has approved applications for both the New York Bay Expansion and the Virginia Southside II Expansion projects, two fully subscribed, demand-driven Transco expansion projects designed to provide natural gas service in 2017. The New York Bay Expansion is designed to serve increasing local distribution demand in New York City while the Virginia Southside II Expansion will help fuel new electric-power generation in Virginia.

“The New York Bay Expansion and Virginia Southside II Expansion projects add to our growing list of Transco projects that connect North America’s abundant natural gas supplies to long-term demand growth from local distribution companies, industrial and power generation customers,” said Rory Miller, senior vice president of Williams Partners’ Atlantic-Gulf operating area. “Our Transco pipeline infrastructure continues to connect prolific natural gas supplies with some of the fastest growing gas markets in the U.S.”

Construction on each project is expected to commence during the fourth quarter of 2016, with each scheduled to be placed into service during the fourth quarter of 2017.

The New York Bay Expansion is designed to bring 115,000 dekatherms per day of firm transportation capacity into National Grid’s distribution system to the Rockaway Delivery Lateral and the Narrows meter station.

The Virginia Southside II Expansion is designed to provide 250,000 dekatherms per day of firm transportation capacity to a delivery point on a new lateral off Transco’s Brunswick Lateral in Virginia, providing additional natural gas needed to serve a new 1,580-megawatt combined-cycle, natural gas-fired generation facility that Dominion Virginia Power is constructing in Greensville County, Virginia.

Transco, a wholly owned subsidiary of Williams Partners, 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, as well as international markets.

About Williams Partners

Williams Partners (NYSE: WPZ) 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 and also in Canada. Williams Partners has operations across the natural gas value chain from gathering, processing and interstate transportation of natural gas and natural gas liquids to petchem production of ethylene, propylene and other olefins. 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 North American natural gas infrastructure, owns 60 percent of Williams Partners, including all of the 2 percent general-partner interest. www.williams.com

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.

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Williams Partners L.P.Media Contact:Christopher Stockton, 713-215-2010orInvestor Contacts:John Porter, 918-573-0797orBrett Krieg, 918-573-4614