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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 11-K


                                  ANNUAL REPORT
                        PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


              -----------------------------------------------------


              For the fiscal years ended December 31, 2001 and 2000


                        Commission File Number 001-31303


                             BLACK HILLS CORPORATION
                             RETIREMENT SAVINGS PLAN


                             BLACK HILLS CORPORATION
                                625 NINTH STREET
                                   PO BOX 1400
                         RAPID CITY, SOUTH DAKOTA 57709



     ----------------------------------------------------------------------







Black Hills Corporation
Retirement Savings Plan

Financial statements as of
December 31, 2001 and 2000
together with report of
independent public accountants







Index to financial statements and supplemental schedules                 Page


Report of independent public accountants                                   1

Statements of net assets available for benefits                            2

Statements of changes in net assets available for benefits                 3

Notes to financial statements                                              4

Schedule H, line 4i-- Schedule of Assets (Held At End of Year)             7

Schedule G, Part III-- Nonexempt Transactions                             10





Report of independent public accountants



To the Trustee of
Black Hills Corporation Retirement Savings Plan:

We have audited the accompanying statements of net assets available for benefits
of the Black Hills Corporation  Retirement  Savings Plan as of December 31, 2001
and 2000,  and the related  statements  of changes in net assets  available  for
benefits  for  the  years  then  ended.  These  financial   statements  and  the
supplemental  schedules  referred to below are the  responsibility of the Plan's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements and supplemental schedules based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain  reasonable  assurance  about  whether the  financial  statements  and
supplemental  schedules  are free of material  misstatement.  An audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the financial  statements  and  supplemental  schedules.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the net assets available for benefits of the Black Hills
Corporation  Retirement  Savings Plan as of December 31, 2001 and 2000,  and the
changes in net assets  available  for  benefits  for the years  then  ended,  in
conformity with accounting principles generally accepted in the United States.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial statements taken as a whole. The supplemental schedules of assets held
for investment purposes and nonexempt transactions are presented for purposes of
additional  analysis  and  are  not a  required  part  of  the  basic  financial
statements  but are  supplementary  information  required by the  Department  of
Labor's Rules and  Regulations  for Reporting and Disclosure  under the Employee
Retirement Income Security Act of 1974. These  supplemental  schedules have been
subjected to the auditing procedures applied in the audit of the basic financial
statements  and, in our opinion,  are fairly stated in all material  respects in
relation to the basic financial statements taken as a whole.

Arthur Andersen LLP



Minneapolis, Minnesota,
April 25, 2002


                                       1



Black Hills Corporation Retirement Savings Plan

Statements of net assets available for benefits

As of December 31



                                               2001              2000
                                               ----              ----
CASH                                        $      6,546      $      7,995

INVESTMENTS, at fair value:                   29,205,700        31,615,328

CONTRIBUTIONS RECEIVABLE:
   Employee                                       20,346            15,989
   Employer                                        8,502             5,980

INVESTMENT TRANSACTIONS PENDING                   46,500             3,543
                                            ------------      ------------
NET ASSETS AVAILABLE FOR BENEFITS           $ 29,287,594      $ 31,648,835
                                            ============      ============

The accompanying notes are an integral part of these statements.


                                       2



Black Hills Corporation Retirement Savings Plan

Statements of changes in net assets available for benefits

For the years ended December 31





                                                                                           2001             2000

                                                                                                 
NET ASSETS AVAILABLE FOR BENEFITS, beginning of year                                   $  31,648,835     $  24,240,845
                                                                                       -------------     -------------
INCREASES (DECREASES) DURING THE YEAR:
   Participant contributions                                                               2,771,292         3,905,269
   Employer matching contributions                                                           933,233           574,290
   Investment interest and dividends                                                         694,891         1,372,971
   Net appreciation (depreciation) in fair value of investments                           (5,150,125)        3,050,147
   Net realized gain on sale of investments                                                  132,449           363,713
   Administrative expenses                                                                    (4,350)           (2,750)
   Distributions to participants                                                          (1,738,631)       (1,855,650)
                                                                                       -------------     -------------
               Net increase (decrease) in net assets                                      (2,361,241)        7,407,990
                                                                                       -------------     -------------
NET ASSETS AVAILABLE FOR BENEFITS, end of year                                         $  29,287,594     $  31,648,835
                                                                                       =============     =============


The accompanying notes are an integral part of these statements.

                                       3



BLACK HILLS CORPORATION RETIREMENT SAVINGS PLAN

Notes to financial statements

December 31, 2001 and 2000


1    Description of the Plan
----------------------------

The following is not a  comprehensive  description  of the Plan and,  therefore,
does  not  include  all  situations  and   limitations   covered  by  the  Plan.
Participants should refer to the plan agreement for more complete information.

General

The Black  Hills  Corporation  Retirement  Savings  Plan (the Plan) is a defined
contribution plan for eligible  employees of Black Hills Corporation and certain
subsidiary  companies of Black Hills  Corporation  (the  Company).  The eligible
employees may have a percentage of their  compensation  withheld and contributed
to the Plan,  subject to  limitations,  as  defined.  The Plan is subject to the
provisions  of the  Employment  Retirement  Income  Security  Act of 1974 and is
designed to comply with the provisions of Section 401(k) of the Internal Revenue
Code (the Code).

Merrill  Lynch  serves as the asset  custodian  and record  keeper.  The Plan is
administered by the Black Hills Corporation  Benefits Committee (the Committee).
The Committee is the trustee of the Plan.

Plan expenses

Administrative  fees of  approximately  $51,700  and  $60,800  were  paid by the
Company in 2001 and 2000.

Eligibility and vesting

Employees are eligible to participate in the Plan on the first day of
employment.

Participants  are  immediately  vested  in the  value  of  their  pretax  salary
reduction  contributions.  Participants  vest 20  percent  per year in  employer
matching  contributions  until  reaching  five years of  service.  At that time,
participants  are  100  percent  vested  in  employer  matching   contributions.
Participants  also become fully  vested in employer  matching  contributions  if
their  employment  with the Company is terminated  due to retirement at or after
attainment of age 65, total and permanent disability, or death.

Forfeitures  from  participant's  who have  terminated  from  the Plan  prior to
attaining 100 percent  vesting  rights are used to reduce the  Company's  annual
matching contributions.

Contributions

The maximum percentage of compensation an employee may contribute to the Plan is
20 percent,  with an annual maximum  contribution of $10,500, as provided by the
Code.  There is no limit to the number of times  participants  may change  their
contribution percentages.  Amounts contributed are invested at the discretion of
plan participants in any of the 28 investment options or individual  investments
as directed by the participant.

Effective  January 1, 2000 (May 1, 2000 for  employees  covered by a  collective
bargaining  agreement),   the  Plan  was  amended  to  include  a  discretionary
dollar-for-dollar Company matching contribution, up to a maximum of 3 percent of
an individual participant's compensation.

Rollover contributions

The Plan  received  $382,579 and  $2,102,946  in rollover  transfers  from other
qualified  plans  in  2001  and  2000,  respectively,   which  are  included  in
participant  contributions  on the statements of changes in net assets available
for benefits.  In 2000 approximately $1.7 million of the rollover transfers came
from participants who were formerly employed by Indeck Capital,  Inc., which was
merged into Black Hills Energy Capital, Inc in 2000.


                                       4



Participant loans

The Plan contains a loan provision  which allows  participants to borrow up to a
maximum  equal to the lesser of $50,000  or 50 percent of their  vested  account
balances at an interest  rate of 1 percent over the prime  interest  rate and to
repay the loan through payroll  deductions,  with a maximum  repayment period of
five years.  During 2001 and 2000,  interest  rates on  outstanding  participant
loans ranged from 5.75  percent to 10.50  percent and from 8.75 percent to 10.50
percent. Loans are prohibited for terminated employees.

Distributions to participants

Employee account balances are distributable upon retirement,  disability, death,
termination  from the Company or hardship.  Upon the  occurrence of one of these
events,  a participant (or the  participant's  beneficiary in the case of death)
may  receive  his or her account  balance as a lump-sum  payment or  installment
payments over a period of no more than 10 years.

Amendments and termination

The Company  reserves the right to amend or terminate the Plan at any time. Upon
termination of the Plan participants  become 100 percent vested,  and all assets
will be distributed among the participants in accordance with plan provisions.

2    Summary of significant accounting policies
-----------------------------------------------

Basis of accounting

The accompanying financial statements have been prepared using the accrual basis
of accounting.

Investment valuation and income recognition

Investments  of the  Plan  are  stated  at  fair  value.  Shares  of  registered
investment companies are valued at quoted market prices, which represent the net
asset value of shares held by the Plan at year-end. Realized gains and losses on
sales of investments  represent the difference between the net proceeds from the
sale of  investments  and their  historical  cost.  Unrealized  appreciation  or
depreciation  of  investments   represents   changes  in  the  market  value  of
investments.

Purchases and sales of securities are reflected on a trade-date basis.  Interest
income is recognized when earned. Dividend income is recorded on the ex-dividend
date.

Use of estimates

The preparation of financial statements in accordance with accounting principles
generally  accepted in the United States  requires  management to make estimates
and  assumptions  that affect the reported  amounts of net assets  available for
benefits at the date of the  financial  statements  and the  reported  amount of
changes in net assets  available  for  benefits  during  the  reporting  period.
Ultimate results could differ from those estimates.

Reclassification

Certain 2000 amounts have been reclassified to conform to the 2001 presentation.
These  reclassifications  had no effect on net assets  available for benefits or
the net increase in net assets available for benefits as previously reported.

3    Investments
----------------

The  investment  options of the Plan at  December  31, 2001  include  collective
trusts of Merrill  Lynch,  mutual  funds,  common stock of the Company and other
investments  as  self-directed  by  participants.  Units (shares) of the various
investment  funds are  valued  daily at net asset  value  (which  equals  market
value).  The investment  options are participant  directed and  participants may
change their investment elections daily.


                                       5



The  following  presents  investments  that  represent  5 percent or more of the
Plan's net assets as of December 31:

                                                  2001              2000
                                                  ----              ----

Merrill Lynch Retirement Preservation Trust  $  4,136,646      $  3,173,244
Merrill Lynch Equity Index Trust 1              3,865,916         4,444,205
Managers International Equity Fund              1,865,202         2,490,145
Merrill Lynch Growth Fund                               *         2,103,703
Davis New York Venture Fund                     1,898,412         1,588,978
Black Hills Corporation common stock            9,044,297        11,958,351

*Under 5 percent.

4    Tax status
---------------

The Plan obtained its latest  determination  letter on October 9, 2001, in which
the Internal  Revenue  Service  stated that the Plan, as then  designed,  was in
compliance  with the  applicable  requirements  of the  Code.  The Plan has been
amended  since   receiving  the   determination   letter;   however,   the  plan
administrator  and the Plan's legal  counsel  believe that the Plan is currently
designed and being operated in compliance  with the applicable  requirements  of
the Code.

5    Party-in-interest transactions
-----------------------------------

The Plan invests in Merrill Lynch funds and Black Hills Corporation stock. These
transactions qualify as exempt party-in-interest transactions.

6    Risks and uncertainties
----------------------------

The Plan provides for investment in a variety of investment  funds.  Investments
in general  are exposed to various  risks,  such as  interest  rate,  credit and
overall market volatility risk. Due to the level of risk associated with certain
investments,  it is  reasonably  possible  that  changes  in the  values  of the
investments  will occur in the near term and that such changes could  materially
affect participants' account balances and the amounts reported in the statements
of net assets available for benefits.


                                       6



Black Hills Corporation Retirement Savings Plan

(Employer identification number: 46-0458824) (Plan number: 003)

Schedule H, line 4i-- Schedule of Assets (Held At End of Year)

As of December 31, 2001




                                   Description                                           Cost**        Current value
--------------------------------------------------------------------------------   ----------------   ---------------
                                                                                                
CASH FUND:
   Merrill Lynch Ready Assets*                                                                        $        25,454
                                                                                                      ---------------

               Total cash fund                                                                                 25,454
                                                                                                      ---------------
COLLECTIVE TRUSTS:
   Merrill Lynch Equity Index Trust 1*                                                                      3,865,916
   Merrill Lynch Retirement Preservation Trust*                                                             4,136,646
                                                                                                      ---------------
                       Total collective trusts                                                              8,002,562
                                                                                                      ---------------
MUTUAL FUNDS:
   Merrill Lynch Growth Fund*                                                                               1,390,695
   Merrill Lynch Pacific Fund*                                                                                 31,706
   PIMCO Total Return Fund                                                                                  1,455,429
   PIMCO Mid-Cap Growth Fund                                                                                   54,353
   Munder Framlington Health Care Fund                                                                        361,615
   Van Kampen Worldwide High Income Fund                                                                       11,506
   Oppenheimer Gold & Special Minerals Fund                                                                    36,549
   Seligman Communications Fund                                                                             1,343,600
   Oppenheimer Global Fund                                                                                    909,160
   Alliance Quasar Fund                                                                                        54,105
   Oppenheimer US Government Fund                                                                             144,090
   State Street Research Global Fund                                                                           33,913
   Franklin Balance Sheet Fund                                                                                143,077
   Pioneer Europe Fund                                                                                         57,036
   Federated International Income Fund                                                                         10,728
   Massachusetts Investors Growth Fund                                                                         95,056
   Davis New York Venture Fund                                                                              1,898,412
   Managers International Equity Fund                                                                       1,865,202
   Davis Series Convertible Securities Fund                                                                    89,430
   Vam Kampen Real Estate Securities Fund                                                                     145,517
   Merrill Lynch Capital Fund*                                                                                690,626
                                                                                                      ---------------
               Total mutual funds                                                                          10,821,805
                                                                                                      ---------------
COMMON STOCK:
   Black Hills Corp.*                                                                                       9,044,297
   Self-Direct Accounts:
   Abbott Labs                                                                                                  3,345
   ADC Telecommunctns Inc.                                                                                      1,380
   Allcopiers Corp.                                                                                                 1
   AOL Time Warner Inc.                                                                                        20,223
   Apple Computer Inc.                                                                                         41,610
   Ariba Inc.                                                                                                   1,392
   AT&T Wireless Services                                                                                       4,613
   AT&T Corp.                                                                                                  18,140



                                       7




                                   Description                                           Cost**        Current value
--------------------------------------------------------------------------------   ----------------   ---------------
                                                                                                

COMMON STOCK (continued):
   Avista Corp.                                                                                       $         1,989
   Calpine Corp.                                                                                                1,763
   Cendant Corp.                                                                                                5,883
   Charter Commncatns Inc A                                                                                     1,643
   Check Point Software Tech                                                                                    2,991
   Cisco Systems Inc.                                                                                          42,558
   Corning Inc.                                                                                                 2,676
   Cypress Semicndtr PV1CTS                                                                                     9,965
   E Trade Group Inc.                                                                                           4,100
   Echelon Corporation EL                                                                                       8,496
   EMC Corporation Mass                                                                                         8,064
   Ericsn LM TEL SEK10B ADR                                                                                     3,340
   Exxon Mobil Corp.                                                                                           39,300
   Fuelcell Energy Inc.                                                                                         3,881
   Globalsantafe Corp.                                                                                          9,468
   Globalstar Telecom                                                                                             178
   Grey Wolf Inc.                                                                                               5,940
   Hollywood Media Corp. FLA                                                                                    1,318
   Intel Corp.                                                                                                 20,443
   Intl Rectifier Corp.                                                                                         5,232
   Knight Trading Group Inc.                                                                                      826
   Koninkl Phil E NY SH NEW                                                                                     8,733
   Laser Vision Centers                                                                                           621
   LSI Logic Corp.                                                                                              1,262
   Lucent Technologies Inc.                                                                                     9,450
   Marketing Svcs Gp In New                                                                                        50
   Mcdata Corp. CL A DEL                                                                                           73
   Medarex Inc.                                                                                                 3,915
   Micron Technology Inc.                                                                                      15,500
   Motorola Inc.                                                                                                5,257
   Navarre Corp.                                                                                                  545
   Nokia Corp.                                                                                                 17,171
   Nortel Networks Corp. New                                                                                    1,492
   Pfizer Inc. Del                                                                                             19,925
   Philip Morris Cos Inc.                                                                                      22,925
   PMC Sierra Inc.                                                                                             14,882
   Protein Polymer Techs                                                                                       17,382
   Qlogic Corp.                                                                                                 4,451
   RF Micro Devices Inc.                                                                                          961
   Rite Aid Corporation                                                                                         2,530
   Safeguard Scientifics                                                                                          525
   Scientific Atlanta                                                                                           2,394
   Southwest Airlns Co.                                                                                        10,662


                                       8






                                   Description                                           Cost**        Current value
--------------------------------------------------------------------------------   ----------------   ---------------
                                                                                                

COMMON STOCK (continued):
   Texas Instruments                                                                                  $         4,200
   Wal Mart Stores Inc.                                                                                         8,632
   Worldcom Inc-MCI Group                                                                                          88
   Worldcom Inc-WORLDCOM GR                                                                                     4,083
                                                                                                      ---------------
               Total common stock                                                                           9,492,764

PARTICIPANT LOANS, with interest rates ranging from 5.75% to 10.50%*                                          863,115
                                                                                                      ---------------
               Total investments                                                                      $    29,205,700
                                                                                                      ===============

*Denotes party in interest.
**Cost is not required for participant-directed accounts.



                                       9





Black Hills Corporation Retirement Savings Plan

(Employer identification number: 46-0458824) (Plan number: 003)

Schedule G, Part III -- Nonexempt Transactions

For the year ended December 31, 2001




                              Relationship to
                                 the Plan,       Description of transactions, including                    Interest
        Identity of          employer or other      maturity date, rate of interest,         Amount        incurred
      party involved         party in interest    collateral, and par or maturity value      loaned         on loan
-----------------------      -----------------   --------------------------------------    -----------   ------------
                                                                                             
Black Hills Corporation           Sponsor        Lending of moneys from the Plan to the    $       974   $          -
                                                  employer (contributions not timely
                                                  remitted to the Plan), as follows:
                                                  Deemed loans dated 1/22/01 and
                                                  6/21/01, with respective maturities
                                                  of 2/21/01 and 6/26/01.


                                       10




                                    SIGNATURE


Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the 401K
Retirement  Savings  Plan Committee  has duly caused this Annual Report to be
signed on its behalf by the undersigned hereunto duly authorized.





                                       Black Hills Corporation
                                       401K Retirement Savings Plan


Date:  May 14, 2002                  By /s/ Roxann R. Basham
                                       ---------------------------------------
                                        Roxann R. Basham