The proposed expansion will primarily consist of approximately 30 miles of new pipe and horsepower addition at existing compressor stations at various locations in Pennsylvania and New Jersey, in addition to existing facility modifications along its mainline. The capital cost of the project is estimated to be approximately $610 million.Most of the new pipe will be installed either entirely within or parallel to existing pipeline and utility rights-of-way. All other compression-related activities will be performed entirely within existing compressor station facilities. If approved, compressor station construction would begin in the fall of 2014 with pipeline construction following in the spring of 2015. The Transco pipeline is a 10,200-mile pipeline system that provides natural gas transportation and storage services for markets throughout the Northeastern and Southeastern United States. Major markets include New York City, Philadelphia, Washington D.C. and Atlanta. Transco's major customers are primarily power generators, local distribution companies and producers. In the last decade, the company has placed into service 20 Transco growth projects totaling in excess of $1.8 billion of capital investment. The current system capacity is approximately 9.9 million dekatherms per day, which is enough natural gas to serve the equivalent of 42 million homes. 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 64 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.