X0303 4 2010-08-31 1 0001411583 WILLIAMS PIPELINE PARTNERS L.P. WMZ 0001216708 WRIGHT PHILLIP D 2800 POST OAK BLVD. HOUSTON TX 77056 1 1 0 0 Sr. VP & COO of GP Common units representing limited partnership interest 2010-08-31 4 J 0 10100 D 0 D Disposed of pursuant to the Agreement and Plan of Merger, dated as of May 24, 2010, by and among Williams Partners L.P. ("Williams Partners"), Williams Partners GP LLC, Williams Partners Operating LLC, WPZ Operating Company Merger Sub LLC, the issuer, and Williams Pipeline GP LLC (the "Merger Agreement"). The reporting person will receive 0.7584 Williams Partners common units in exchange for each common unit of the issuer, and cash for any fractional units. The closing price of the Williams Partners common units on the New York Stock Exchange on August 31, 2010, the effective date of the merger, was $42.11. Beth A. Burkholder, Attorney-in-Fact for Mr. Phillip D. Wright 2010-09-02