X0203 3 2008-07-23 0 0001376812 Patriot Coal CORP PCX 0001052192 CASCADE INVESTMENT LLC 2365 CARILLON POINT KIRKLAND WA 98033 0 0 0 1 (1) 0000902012 GATES WILLIAM H III ONE MICROSOFT WAY REDMOND WA 98052 0 0 0 1 (1) Common Stock 1204326 D The Reporting Persons may be deemed to be a member of a group beneficially owning 10% or more of the Common Stock of the issuer within the meaning of Section 13(d) of the Securities Exchange Act of 1934. The Reporting Persons disclaim beneficial ownership of all securites other than those reported above, and this report shall not be deemed an admission that such a group exists or that the Reporting Persons are the beneficial owners of the securities of such group for purposes of Section 16 or for any other purpose. * Duly authorized under Special Power of Attorney appointing Michael Larson attorney-in-fact, dated February 3, 2006, by and on behalf of William H. Gates III, filed as Exhibit 99.1 to Cascade Investment, L.L.C.'s Amendment No. 2 to Schedule 13G with respect to Arch Capital Group Ltd. on March 7, 2006, SEC File No. 005-45257, and incorporated by reference herein. Cascade Investment, L.L.C. By: /s/ Michael Larson, Business Manager 2008-08-01 William H Gates III By: /s/ Michael Larson*, Attorney-In-Fact 2008-08-01