Washington, D.C. 20549

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Name, Address and Telephone Number of Person Authorized to
Receive Notices and Communications)

(Date of Event Which Requires Filing of this Statement)

 

 

CUSIP No.		406092304

(1) Yorktown VIII Company LP is the sole general partner of Yorktown Energy Partners VIII, L.P. Yorktown VIII Associates LLC is the sole general partner of Yorktown VIII Company LP. As a result, Yorktown VIII Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown Energy Partners VIII, L.P. Yorktown VIII Company LP and Yorktown VIII Associates LLC disclaim beneficial ownership of the securities owned by Yorktown Energy Partners VIII, L.P. in excess of their pecuniary interests therein.

(2) Based on 26,608,028 shares of common stock issued and outstanding as of September 15, 2009, as confirmed by Hallador Petroleum Company.

CUSIP No.		406092304

(1) Yorktown VIII Company LP is the sole general partner of Yorktown Energy Partners VIII, L.P. Yorktown VIII Associates LLC is the sole general partner of Yorktown VIII Company LP. As a result, Yorktown VIII Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown Energy Partners VIII, L.P. Yorktown VIII Company LP and Yorktown VIII Associates LLC disclaim beneficial ownership of the securities owned by Yorktown Energy Partners VIII, L.P. in excess of their pecuniary interests therein.

(2) Based on 26,608,028 shares of common stock issued and outstanding as of September 15, 2009, as confirmed by Hallador Petroleum Company.

CUSIP No.		406092304

(1) Yorktown VIII Company LP is the sole general partner of Yorktown Energy Partners VIII, L.P. Yorktown VIII Associates LLC is the sole general partner of Yorktown VIII Company LP. As a result, Yorktown VIII Associates LLC may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown Energy Partners VIII, L.P. Yorktown VIII Company LP and Yorktown VIII Associates LLC disclaim beneficial ownership of the securities owned by Yorktown Energy Partners VIII, L.P. in excess of their pecuniary interests therein.

(2) Based on 26,608,028 shares of common stock issued and outstanding as of September 15, 2009, as confirmed by Hallador Petroleum Company.

Item 1. Security and Issuer.

This Schedule 13D relates to the common stock, par value $.01 per share (the “Common Stock”), of Hallador Petroleum Company (the “Company”) whose principal executive offices are located at 1660 Lincoln Street, Suite 2700, Denver, Colorado 80264.

Item 2. Identity and Background.

This statement is filed by Yorktown Energy Partners VIII, L.P., a Delaware limited partnership (“Yorktown”), Yorktown VIII Company LP, a Delaware limited partnership (“Yorktown Company”) and Yorktown VIII Associates LLC, a Delaware limited liability company (“Yorktown Associates”). The principal office and business address of Yorktown, Yorktown Company and Yorktown Associates is 410 Park Avenue, 19th Floor, New York, New York 10022. The principal business of Yorktown is investing in equity securities of energy companies. The principal business of Yorktown Company is managing Yorktown. The principal business of Yorktown Associates is managing Yorktown Company.

Yorktown, Yorktown Company and Yorktown Associates have not, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

Yorktown, Yorktown Company and Yorktown Associates have not, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration.

Yorktown used $17,700,000 of partnership funds to purchase 2,950,000 shares of Common Stock on September 15, 2009.

Item 4. Purpose of Transaction.

Yorktown acquired its 2,950,000 shares of Common Stock for investment purposes. As of the date hereof, Yorktown, Yorktown Company and Yorktown Associates have not formulated any specific plans or proposals which relate to or would result in: (a) the acquisition by any person of additional securities of the Company or the disposition of securities of the Company; (b) an extraordinary corporate transaction, such as a merger, reorganization or liquidation involving the Company or any of its subsidiaries; (c) a sale or transfer of a material amount of assets of the Company or any of its subsidiaries; (d) any change in the present board of directors or management of the Company, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the board of the Company; (e) any material change in the present capitalization or dividend policy of the Company; (f) any other material change in the Company’s business or corporate structure; (g) changes in the Company’s charter, bylaws or instruments corresponding thereto or other actions which may impede the acquisition of control of the Company by any person; (h) causing a class of securities of the Company to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) causing a class of equity securities of the Company to become eligible for termination of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of 1934, as amended; or (j) any action similar to any of those enumerated above.

Item 5. Interest in Securities of the Issuer.

(a)

As of September 24, 2009, Yorktown, Yorktown Company and Yorktown Associates beneficially owned 2,950,000 shares of Common Stock, representing 11.1% of the Company’s outstanding shares of common stock (based on 26,608,028 shares of Common Stock issued and outstanding as of September 15, 2009, as confirmed by Hallador Petroleum Company).

	(b)		Yorktown VIII Company LP is the sole general partner of Yorktown Energy Partners VIII, L.P. Yorktown VIII Associates LLC is the sole general partner of Yorktown VIII Company LP. Yorktown Associates has the sole power to cause Yorktown Company to cause Yorktown to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown.
	(c)		On September 15, 2009, Yorktown acquired from the Company 2,950,000 shares of Common Stock for $6.00 per share for an aggregate price of $17,700,000 through a private placement exempt from the registration requirements of the Securities Act of 1933, as amended.
	(d)		No person other than Yorktown has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock reported on this Schedule 13D.
	(e)		Inapplicable.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

None.

Item 7. Material to Be Filed as Exhibits.

Exhibit 1   —   Joint Filing Agreement dated September 25, 2009

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: September 25, 2009

YORKTOWN ENERGY PARTNERS VIII, L.P.
By:		Yorktown VIII Company LP,
		its general partner
By:		Yorktown VIII Associates LLC,
		its general partner
By:		/s/ Bryan H. Lawrence   Bryan H. Lawrence, Member
YORKTOWN VIII COMPANY LP
By:		Yorktown VIII Associates LLC,
		its general partner
By:		/s/ Bryan H. Lawrence   Bryan H. Lawrence, Member
YORKTOWN VIII ASSOCIATES LLC
By:		/s/ Bryan H. Lawrence   Bryan H. Lawrence, Member

EXHIBIT INDEX

Exhibit No.				Description
Exhibit 1		—		Joint Filing Agreement dated September 25, 2009