Williams Partners' Transco Pipeline Announces Open Season for Dalton Expansion Project

Williams Partners L.P.

announced today that it is initiating a non-binding open season from May 30 to June 28, 2012, for an expansion of its Transco interstate pipeline to provide incremental firm natural gas transportation capacity to markets in northern Georgia and Alabama by 2016. Williams

owns approximately 68 percent of Williams Partners, including the general-partner interest. The Dalton Expansion Project is being designed to provide up to 600,000 dekatherms per day of incremental firm transportation service on Williams Partners' Transco pipeline from interconnections accessing Marcellus natural gas production at its Zone 6 Station 210 pooling point to delivery points in northern Georgia and Alabama. “The Transco pipeline is uniquely positioned to provide power generators and local distribution companies located in the southeastern United States with direct access to substantial Marcellus natural gas supplies,” said Randy Barnard, president of Williams Partners' natural gas pipeline business.