SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                    Form 8-K



                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       THE SECURITIES EXCHANGE ACT OF 1934

                          Date of Report: June 23, 1999



                             BLACK HILLS CORPORATION

State of South Dakota                  File Number 1-7978  IRS Number 46-0111677



                                625 Ninth Street
                         Rapid City, South Dakota 57709



                  Registrant's telephone number (605) 348-1700






Item 5.           Other Events

BLACK HILLS CORPORATION'S ELECTRIC UTILITY OPERATIONS AGREE TO RATE FREEZE

         Black Hills  Corporation's  electric  utility  operations,  Black Hills
Power and Light Company (Company) has agreed to extend its rate freeze for South
Dakota  retail   customers   until  January  1,  2005,   barring   extraordinary
circumstances.  The Company froze  electric rates in 1995 when the Company's new
power  plant,  Neil  Simpson  Unit #2, was placed in service:  the current  rate
freeze ends  January 1, 2000.  The  extension of the rate freeze was approved by
the South Dakota Public Utilities Commission on June 22, 1999.

         The rate freeze is subject to the following terms and conditions:

1.       The  Company  will  not  file  any  additional  applications  with  the
         Commission,  which would  result in an  increase  in  revenues  for the
         period between January 1, 2000 through  December 31, 2004 ("Rate Freeze
         Period");  provided,  however,  that the Rate  Freeze  Period  does not
         prevent  the  Company  for filing  for a rate  increase  subsequent  to
         January 1, 2005,  or from filing for a rate  increase if the  Company's
         cost  of  service  is   expected   to   increase  as  a  result  of  an
         "Extraordinary  Event" as defined below,  nor is the Rate Freeze Period
         intended to prohibit  the Company from filing a rate  application  that
         requests  changes in rates for  reasons  other than to obtain a general
         rate increase.

         An  Extraordinary  Event is  defined  as the  occurrence  of one of the
following:

(a)               New  federal,  state or  local  governmental  requirements  or
                  governmental  charges,  including,  but not limited to, income
                  taxes,   taxes  or  charges  imposed  on  energy,   emissions,
                  environmental   externalities   or  reclamation   obligations,
                  imposed  after  January  1,  2000,  upon  the  Company  or its
                  subsidiary, Wyodak Resources Development Corp. that project to
                  cause the Company's cost of service to South Dakota  customers
                  to increase in an material  amount.  Increases  in the cost of
                  service of less than  $2,000,000  will be  presumed  not to be
                  material for the purposes of this paragraph.

(b)               Forced  outages,  caused  by an  act  of  nature  or  criminal
                  activity or resulting  from fire or explosion  from any cause,
                  occurring  to both the Wyodak  Plant and Neil  Simpson Unit #2
                  which are projected to continue  simultaneously  over a period
                  exceeding 60 days.

(c)               Forced  outage  occurring  to either the Wyodak  Plant or Neil
                  Simpson  Unit #2 which  has  continued  for a period  of three
                  months and is projected to be nine months or more.



(d)               The  Consumers  Price  Index,  All Urban,  as  compiled by the
                  United States  Department of Labor increases to a monthly rate
                  for  six  consecutive  months  which  if  continuing  for  the
                  following  six  months  would  result in a 10  percent or more
                  annual inflation rate.

(e)               The  loss  of a  South  Dakota  customer  or  revenue  from an
                  existing  South Dakota  customer  that,  if  projected,  would
                  result in a loss of revenue to the  Company of  $2,000,000  or
                  more during any 12-month period.

(f)               The  cost of  coal to the  Company's  South  Dakota  customers
                  increases and is projected to increase by more than $2,000,000
                  over the cost of the most recent calendar year.

(g)               Electric  deregulation  as a result of either federal or state
                  mandate which allows any customer of the Company to choose its
                  provider  of  electricity  at any time  during the Rate Freeze
                  Period.

2.       The Company  shall not include a fuel and  purchased  power  adjustment
         tariff,  nor make any  application  to  reinstate a fuel and  purchased
         power adjustment tariff to take effect prior to January 1, 2005, except
         if any Extraordinary Event occurs.

3.       The  Company  shall  continue  to retain  without  adjustment  to rates
         charged its South Dakota  customers all revenues and benefits  realized
         from the sale of wholesale capacity and energy.

4.       The Company may effect a transfer and/or assignment of any right it has
         in any sale of  wholesale  capacity  and energy  without  review of the
         consideration,  subject to the Commission  reviewing the reasonableness
         and prudency of such actions in any subsequent  general rate proceeding
         which is initiated with the intent to raise or reduce rates.

5.       The  Company  may  enter  into  power  purchase  transactions  or power
         resource  transfers with its  affiliated  exempt  wholesale  generator,
         subject to the Commission's  review for  reasonableness and prudency in
         any  subsequent  general rate  proceeding  which is initiated  with the
         intent to raise or reduce rates.

6.       The  Commission  shall have the right in its discretion to adjust rates
         if there is any material  reduction in federal,  state,  or local taxes
         occur  which is  projected  to be  material  to the  Company's  cost of
         service  for its  South  Dakota  customers.  Decreases  in the  cost of
         service of less than  $1,000,000 are deemed to be not material for this
         purpose.

Item 7c.       Exhibits

Exhibit 99     Black Hills  Corporations News Release announcing its agreement
               to a five-year rate freeze.



               Pursuant to the  requirements of the Securities Exchange Act of
         1934,  the registrant has duly caused this report to be signed on its
         behalf by the undersigned hereunto duly authorized.

                                         BLACK HILLS CORPORATION



                                         By /s/ Roxann R. Basham

                                         Roxann R. Basham, Vice President -
                                         Finance and Principal Financial Officer


         Dated June 23, 1999