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* RIO TINTO PLC (Last) (First) (Middle) 2 EASTBOURNE TERRACE (Street) LONDON X0 W2 6LG (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/19/2009	3. Issuer Name and Ticker or Trading Symbol CLOUD PEAK ENERGY INC. [ CLD ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)	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)

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
Common Membership Units	(1)	(1)	Common Stock of Cloud Peak Energy Inc., par value $.01/share	60,000,000	(1)	I(2)	See footnote(2)

1. Name and Address of Reporting Person* RIO TINTO PLC (Last) (First) (Middle) 2 EASTBOURNE TERRACE (Street) LONDON X0 W2 6LG (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RIO TINTO EUROPEAN HOLDINGS LTD (Last) (First) (Middle) 2 EASTBOURNE TERRACE (Street) LONDON X0 W2 6LG (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RIO TINTO WESTERN HOLDINGS LTD (Last) (First) (Middle) 2 EASTBOURNE TERRACE (Street) LONDON X0 W2 6LG (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RIO TINTO AMERICA HOLDINGS INC (Last) (First) (Middle) 100 QUENTIN ROOSEVELT BOULEVARD (Street) GARDEN CITY NY 11530 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RTAH LLC (Last) (First) (Middle) P.O. BOX 3009 505 SOUTH GILLETTE AVENUE (Street) GILLETTE WY 82717-3009 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RIO TINTO AMERICA INC (Last) (First) (Middle) 3595 S 8309 W (Street) MAGNA UT 84044 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* RIO TINTO ENERGY AMERICA INC (Last) (First) (Middle) 505 SOUTH GILLETTE AVENUE (Street) GILLETTE WY 82717-3009 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* KENNECOTT MANAGEMENT SERVICES CO (Last) (First) (Middle) P.O. BOX 3009 505 SOUTH GILLETTE AVENUE (Street) GILLETTE WY 82717-3009 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. For text of Footnote 1, see Exhibit 99.1.

2. For text of Footnote 2, see Exhibit 99.1.

Remarks:

Preston Chiaro serves on the board of directors of the Issuer and is the Group Executive, Technology & Innovation, of Rio Tinto. As a result, the Reporting Owners may be deemed directors of the Issuer by deputization. Exhibit List Exhibit 24 - Powers of Attorney Exhibit 99.1 - Text of Footnote 1 and Footnote 2.

	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO PLC	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO EUROPEAN HOLDINGS LIMITED	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO WESTERN HOLDINGS LIMITED	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO AMERICA HOLDINGS INC.	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RTAH LLC	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO AMERICA INC.	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, RIO TINTO ENERGY AMERICA INC.	11/17/2009
	/s/ Jim Berson, Attorney-in-Fact, KENNECOTT MANAGEMENT SERVICES COMPANY	11/17/2009
	** Signature of Reporting Person	Date
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