Williams Partners Reports Execution Progress on Gulfstar One, Expects Service to Producers in Third Quarter and to Gunflint

  Williams Partners Reports Execution Progress on Gulfstar One, Expects
  Service to Producers in Third Quarter and to Gunflint Tieback in 2016

  *Spar Moored in February, Topside Structure Installed in March, Hook-up and
    Commissioning Underway
  *Tieback Expansion Fully Contracted to Serve Gunflint Producers

Business Wire

TULSA, Okla. -- March 24, 2014

Williams Partners L.P. (NYSE: WPZ) reported key construction milestones and
progress on a tieback expansion as its proprietary Gulfstar FPS™ (Floating
Production System) nears completion in the eastern deepwater Gulf of Mexico.
The Gulfstar One project is the first spar-based floating production system
with major components built entirely in the United States.

Williams Partners' made-in-America Gulfstar One is 21,500 tons of proof that
American engineering an ...

Williams Partners' made-in-America Gulfstar One is 21,500 tons of proof that
American engineering and construction are alive and well. The hull of the
floating production system was towed out and positioned in the deepwater Gulf
of Mexico before the topside platform was installed in March 2014. (Photo:
Business Wire)

After mooring the floating spar to the ocean floor in February, crews in March
lifted and installed Gulfstar’s three-level topside structure. The floating
production system is moored 135 miles southeast of New Orleans in about 4,000
feet of water. It will serve as a hub that aggregates production and then
combines production handling services with oil and gas export pipeline
services, which feed Williams’ downstream oil and gas gathering and processing

Once operational, the Gulfstar’s base design will produce up to 60,000 barrels
of oil per day and 135 million standard cubic feet of gas per day with
additional tieback capacity. With hook-up and commissioning activities
currently underway, Gulfstar is on schedule to start serving anchor customers
in the third quarter of 2014 and Gunflint in 2016.

In addition to previously announced anchor commitments, Gulfstar in January
executed agreements with Gunflint field owners Noble Energy, Inc., Ecopetrol
America Inc., Marathon Oil Company and Samson Offshore, LLC. The Gunflint
tieback is designed and engineered with modifications expected to be completed
after the base Gulfstar project is completed.

“Landing this Gunflint tieback before first oil is received from the anchor
tenants demonstrates the promise of the Gulfstar model for producers, both
economically and technically,” said Rory Miller, senior vice president of
Williams’ Atlantic-Gulf operating area. “As a midstream company, Williams is
focused on infrastructure solutions of this nature that connect the best
supplies with highest-value markets. Gulfstar is one of approximately $4.5
billion in large-scale projects we expect to bring into service in 2014 and

Major components of the Gulfstar were built entirely in the United States,
creating approximately 1,000 domestic jobs and allowing quick parts
replacement and reduced platform downtime. Gulf Marine Fabricators built the
hull in Aransas Pass, Texas and Gulf Island Fabrication, Inc. constructed the
topsides in Houma, La.

“Gulfstar provides a complete ‘floating production system to market clearing
point’ solution for producers in the Gulf for their oil, gas and liquids
production, designed specifically to maximize their net present value and
minimize risk,” said Mark Cizek, Gulfstar Project Director. “The ‘design one,
build many’ construction concept allows for standardized design options and
enhanced safety and reliability of each unit. The repeatable concept also
increases speed to market.”

Williams Partners developed the Gulfstar One project and it has a 51 percent
ownership interest. Marubeni Corporation has a 49 percent interest in the
Gulfstar One project.

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 66 percent of Williams
Partners, including the general-partner interest. More information is
available at www.williamslp.com, where the partnership routinely posts
important information.

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