TULSA, Okla., Nov. 30 /PRNewswire-FirstCall/ -- Williams Partners L.P. (NYSE:WPZ) today announced management's preliminary estimate for the total financial effect it expects as a result of the Nov. 28 fire at its Ignacio natural gas processing plant. Management expects a total reduction in expected cash flows of $10 million to $20 million, primarily in the fourth quarter of 2007. This range includes the expected mitigating effect of its property-damage and business-interruption insurance. Management does not expect this reduction in cash flow to impact its regular quarterly cash distributions to unitholders. About Williams Partners L.P. (NYSE:WPZ) Williams Partners L.P. is a publicly traded master limited partnership that owns natural gas gathering, transportation, processing and treating assets serving regions where producers require large scale and highly reliable services, including the Gulf of Mexico and the San Juan Basin in New Mexico and Colorado. The partnership also serves the natural gas liquids (NGL) market through its NGL fractionating and storage assets. The general partner is Williams Partners GP LLC. More information about the partnership is available at http://www.williamslp.com. Contact: Jeff Pounds Williams (media relations) (918) 573-3332 Richard George Williams (investor relations) (918) 573-3679 Sharna Reingold Williams (investor relations) (918) 573-2078 This press release may include "forward-looking statements" as defined by federal law. All statements, other than statements of historical facts, included in this press release that address activities, events or developments that the Partnership expects, believes or anticipates will or may occur in the future are forward-looking statements. These statements are based on certain assumptions made by the Partnership based on its experience and perception of historical trends, current conditions, expected future developments and other factors it believes are appropriate in the circumstances. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond the control of the Partnership, which may cause our actual results to differ materially from those implied or expressed by the forward-looking statements. 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. DATASOURCE: Williams Partners L.P. CONTACT: Media, Jeff Pounds, +1-918-573-3332, or investors, Richard George, +1-918-573-3679, or Sharna Reingold, +1-918-573-2078, all of Williams Web site: http://www.williamslp.com/ http://www.williams.com/

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