SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* CASCADE INVESTMENT LLC (Last) (First) (Middle) 2365 CARILLON POINT (Street) KIRKLAND WA 98033 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 07/23/2008	3. Issuer Name and Ticker or Trading Symbol Patriot Coal CORP [ PCX ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner Officer (give title below) X Other (specify below) (1)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1,204,326(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* CASCADE INVESTMENT LLC (Last) (First) (Middle) 2365 CARILLON POINT (Street) KIRKLAND WA 98033 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) (1)

1. Name and Address of Reporting Person* GATES WILLIAM H III (Last) (First) (Middle) ONE MICROSOFT WAY (Street) REDMOND WA 98052 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director 10% Owner Officer (give title below) X Other (specify below) (1)

Explanation of Responses:

1. 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.

Remarks:

* 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	08/01/2008
	William H Gates III By: /s/ Michael Larson*, Attorney-In-Fact	08/01/2008
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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