Williams Partners Expands Pipeline Capacity to Deliver Natural Gas to Serve Growing Florida Power Generation Market

TULSA, Okla.–(BUSINESS WIRE)–Williams Partners L.P. (NYSE: WPZ) announced today that it has
successfully placed into service the first phase of its Hillabee
expansion project, expanding the capacity of its Transco pipeline system
in Alabama by 818,410 dekatherms per day (Dth/d) to supply Florida power
generators via the new Sabal Trail pipeline.

The project was approved by the Federal Energy Regulatory Commission
(FERC) in February 2016.

Designed to be constructed in three phases, the Hillabee expansion
project will add a total of approximately 1,131,730 Dt/d of pipeline
capacity to the Transco system by 2021. The project’s second phase is
scheduled to be in service by the second quarter of 2020, while the
third and final phase would be in service by the second quarter of 2021.

“The Hillabee project is an important Transco expansion providing
clean-burning natural gas to meet the needs of Florida’s rapidly growing
power generation market,” said Frank Ferazzi, senior vice president of
Williams Partners’ Atlantic-Gulf operating area. “Together, the Hillabee
and Sabal Trail projects connect Florida power generators with Transco’s
Station 85 Pool, giving them direct access to robust natural gas supply
basins in the Haynesville and Midcontinent area, and soon with the
completion of Atlantic Sunrise, to the prolific Marcellus dry gas area
in northeastern Pennsylvania.”

The first phase of the Hillabee project included the construction of a
new compressor facility in Choctaw County, Ala., approximately 20 miles
of pipeline looping, in addition to existing compressor facility
modifications.

Construction on the second phase of the project, which will include
nearly 11 miles of looping in addition to existing compressor facility
modifications, is expected to get underway in the second quarter of 2019.

Transco, the nation’s largest-volume and fastest-growing interstate
natural gas pipeline system, is a wholly owned subsidiary of Williams
Partners L.P. Transco 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 reaches U.S. markets in 12
Southeast and Atlantic Seaboard states.

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 the partnership 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 the partnership’s annual and quarterly
reports filed with the Securities and Exchange Commission.

Contacts

Williams Partners L.P.
Media Contact:
Christopher
Stockton, 713-215-2010
or
Investor Contact:
Brett
Krieg, 918-573-4614