BLACK HILLS CORP /SD/ — Regulatory Filings 2010

Jun 16, 2010

As filed with the Securities and Exchange Commission on June 16, 2010

Registration No. 333-135431

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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POST-EFFECTIVE AMENDMENT NO. 1

TO

FORM S-8

REGISTRATION STATEMENT

under

The Securities Act of 1933

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BLACK HILLS CORPORATION

(Exact Name of Registrant as Specified in its Charter)

South Dakota	46-0458824
(State or Other Jurisdiction of Incorporation or Organization)	(IRS Employer Identification No.)

625 Ninth Street, P.O. Box 1400 Rapid City, South Dakota	57709
(Address of Principal Executive Offices)	(Zip Code)

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CHEYENNE LIGHT, FUEL AND POWER COMPANY

RETIREMENT SAVINGS PLAN

FOR NON-BARGAINING UNIT EMPLOYEES

(Full Title of the Plan)

CHEYENNE LIGHT, FUEL AND POWER COMPANY

RETIREMENT SAVINGS PLAN

FOR BARGAINING UNIT EMPLOYEES

(Full Title of the Plan)

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Steven J. Helmers

General Counsel

Black Hills Corporation

625 Ninth Street, P.O. Box 1400

Rapid City, South Dakota 57709

(605) 721-1700

(Name, Address and Telephone Number, Including Area Code of Agent for Service)

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Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company (as defined in Rule 12b-2 of the Exchange

Large accelerated filer	x	Accelerated filer	o
Non-accelerated filer	o	Smaller reporting company	o

DEREGISTRATION OF SECURITIES

Black Hills Corporation filed a registration statement on Form S-8, Registration No. 333-135431, with the Securities and Exchange Commission on June 29, 2006, to register 100,000 shares of common stock, par value $1.00 per share, for issuance under the Cheyenne Light, Fuel and Power Company Retirement Savings Plans for Non-Bargaining and Bargaining Unit Employees (the “Cheyenne Retirement Savings Plans”). The Cheyenne Retirement Savings Plans have now merged into the Black Hills Corporation Retirement Savings Plan, with the latter plan surviving. Black Hills Corporation is filing this Post-Effective Amendment to the Registration Statement to deregister the 91,257 shares of common stock registered and reserved for issuance under the Registration Statement which remained unissued at the date hereof.

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SIGNATURES

The Registrant . Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Post-Effective Amendment No. 1 to the Form S-8 Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Rapid City, State of South Dakota, on the 16 th day of June, 2010.

BLACK HILLS CORPORATION

By: /s/ David R. Emery

David R. Emery

Chairman, President and Chief Executive Officer

The Plan. Pursuant to the requirements of the Securities Act of 1933, the persons who administer the Plan have duly caused this Registration Statement to be signed on their respective behalf by the undersigned, thereunto duly authorized, in the City of Rapid City, State of South Dakota, on the 16 th day of June, 2010.

CHEYENNE LIGHT, FUEL AND POWER COMPANY RETIREMENT SAVINGS PLAN

By: /s/ Anthony S. Cleberg

Anthony S. Cleberg

Representative of Benefits Committee

Each individual whose signature appears below constitutes and appoints David R. Emery and Anthony S. Cleberg, and each of them severally, as his or her true and lawful attorneys-in-fact and agents with full power of substitution, to sign in his or her name and behalf, in any and all capacities stated below, and to file with the Securities and Exchange Commission, any and all amendments, to this Registration Statement, and the Registrant hereby also appoints each such agent as its attorney-in-fact with the authority to sign and file any such amendments in its name and behalf.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

/s/ David R. Emery	Director and	June 16, 2010
David R. Emery, Chairman, President	Principal Executive Officer
and Chief Executive Officer
/s/ Anthony S. Cleberg	Principal Financial and	June 16, 2010
Anthony S. Cleberg, Executive Vice President and	Accounting Officer
Chief Financial Officer
/s/ David C. Ebertz	Director	June 16, 2010
David C. Ebertz
/s/ Jack W. Eugster	Director	June 16, 2010
Jack W. Eugster
/s/ John R. Howard	Director	June 16, 2010
John R. Howard
/s/ Kay S. Jorgensen	Director	June 16, 2010
Kay S. Jorgensen

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/s/ Stephen D. Newlin	Director	June 16, 2010
Stephen D. Newlin
/s/ Gary L. Pechota	Director	June 16, 2010
Gary L. Pechota
/s/ Warren L. Robinson	Director	June 16, 2010
Warren L. Robinson
/s/ John B. Vering	Director	June 16, 2010
John B. Vering
/s/ Thomas J. Zeller	Director	June 16, 2010
Thomas J. Zeller

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