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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 11-K

(Mark One)

/X/   Annual Report Pursuant to Section 15(d) of the Securities Exchange Act
      of 1934

For the fiscal year ended DECEMBER 31, 1997

                                       or

/ /   Transition Report Pursuant to Section 15(d) of the Securities Exchange Act
      of 1934

For the transition period from           to 
                               ---------     ---------


                           Commission File No. 1-3548


                    MINNESOTA POWER AND AFFILIATED COMPANIES
                          EMPLOYEE STOCK OWNERSHIP PLAN
                                    AND TRUST

                            (Full Title of the Plan)

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

                              Minnesota Power, Inc.
                             30 West Superior Street
                             Duluth, Minnesota 55802

                          (Name of issuer of securities
                          held pursuant to the Plan and
                          the address of its principal
                                executive office)

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







                                      INDEX


                                                                         Page

Report of Independent Accountants                                          1

Statement of Net Assets Available for Plan Benefits                        2

Statement of Changes in Net Assets Available for Plan Benefits             3

Notes to Financial Statements                                              4

Supplemental Schedules

         Schedule I:     Investments Held                                  8

         Schedule II:    Transactions in Excess of 5% of Fair Value
                         of Plan Assets                                    8

Signatures                                                                 9





    Price Waterhouse LLP     3100 Multifoods Tower        Telephone 612-332-7000
                             33 South Sixth Street        Facsimile 612-332-6711
                             Minneapolis, MN 55402-3795


Price Waterhouse                                          [LOGO]


                                                  
                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Participants and Administrator
of the Minnesota Power and Affiliated
Companies Employee Stock Ownership
Plan and Trust


In our opinion,  the  accompanying  statements of net assets  available for plan
benefits and the related  statements of changes in net assets available for plan
benefits present fairly, in all material respects,  the net assets available for
plan benefits of the Minnesota  Power and  Affiliated  Companies  Employee Stock
Ownership  Plan and Trust at December 31, 1997, and 1996, and the changes in net
assets  available for plan benefits for the years then ended, in conformity with
generally accepted  accounting  principles.  These financial  statements are the
responsibility  of the Plan's  management;  our  responsibility is to express an
opinion on these  financial  statements  based on our audits.  We conducted  our
audits of these  statements  in  accordance  with  generally  accepted  auditing
standards which require that we plan and perform the audit to obtain  reasonable
assurance   about  whether  the  financial   statements  are  free  of  material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for the opinion expressed above.

Our audit was made for the purpose of forming an opinion on the basic  financial
statements taken as a whole. The additional  information included in Schedules I
and II is presented  for purposes of  additional  analysis and is not a required
part of the basic financial statements but is additional information required by
the Employee  Retirement  Income Security Act of 1974. Such information has been
subjected to the auditing procedures applied in the audit of the basic financial
statements  and, in our opinion,  is fairly  stated in all material  respects in
relation to the basic financial statements taken as a whole.


PRICE WATERHOUSE LLP


Price Waterhouse LLP
Minneapolis, Minnesota
June 5, 1998

                                       1




                    MINNESOTA POWER AND AFFILIATED COMPANIES
                     EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST
               STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                    Thousands


                                                         DECEMBER 31,
                                                 1997                    1996
- --------------------------------------------------------------------------------

ASSETS, AT FAIR VALUE

     Investment in Minnesota Power, Inc.
     common stock                            $  188,208               $ 122,003

     Contributions receivable from Company        1,095                   1,116

     Interest receivable                             10                       2

     Cash and cash equivalents                      357                      18
                                             ----------               ---------

         Total assets                           189,670                 123,139
                                             ----------               ---------



LIABILITIES

     Accrued interest expense                     1,095                   1,116

     Long-term debt                              81,201                  82,098
                                             ----------               ---------

         Total liabilities                       82,296                  83,214
                                             ----------               ---------



NET ASSETS AVAILABLE FOR PLAN BENEFITS       $  107,374               $  39,925
                                             ==========               =========







- --------------------------------------------------------------------------------
        The accompanying notes are an integral part of these statements.

                                       2




                    MINNESOTA POWER AND AFFILIATED COMPANIES
                     EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST
         STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
                                    Thousands

                                                        YEAR ENDED
                                                       DECEMBER 31,
                                               1997                    1996
- -------------------------------------------------------------------------------

SOURCES OF NET ASSETS

     Dividend income                      $    8,892                $  9,161

     Company contributions                     1,873                   2,917

     Net unrealized appreciation
      (depreciation) of investments           68,615                  (3,871)

     Interest income                              34                      31
                                          ----------                --------

                                              79,414                   8,238

APPLICATION OF NET ASSETS

     Participants' withdrawals                (3,105)                 (4,816)

     Transfers to pension plan                  (578)                   (573)

     Interest expense                         (8,278)                 (8,496)

     Administrative expenses                      (4)                     (3)
                                          -----------               --------

INCREASE (DECREASE) IN NET ASSETS             67,449                  (5,650)


NET ASSETS AVAILABLE FOR PLAN BENEFITS

     Beginning of year                        39,925                  45,575
                                          ----------                --------

     End of year                          $  107,374                $ 39,925
                                          ==========                ========







- --------------------------------------------------------------------------------
        The accompanying notes are an integral part of these statements.

                                       3




                    MINNESOTA POWER AND AFFILIATED COMPANIES
                     EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST
                          NOTES TO FINANCIAL STATEMENTS



NOTE 1 - DESCRIPTION OF THE PLAN

         The Minnesota Power and Affiliated  Companies  Employee Stock Ownership
Plan and Trust (ESOP)  provides  eligible  employees of  Minnesota  Power,  Inc.
(Minnesota  Power),  formerly  Minnesota Power & Light Company;  Superior Water,
Light and Power Company; and MP Water Resources Group, Inc., (collectively,  the
Companies) with Minnesota Power common stock (Common Stock) ownership  benefits.
The ESOP is a defined contribution plan that is subject to the provisions of the
Employee  Retirement  Income Security Act of 1974 (ERISA).  At December 31, 1997
there were 1,585 participants in the ESOP.

BASIC ACCOUNT

         Participants'  Basic Accounts received shares of Common Stock purchased
with incremental  investment  credit  contributions and payroll-based tax credit
contributions.  Contributions to the  participant's  Basic Accounts ceased after
1986.

         All participants' Basic Accounts are fully vested.  These shares can be
withdrawn  at any time.  Every  December  participants  are  required to make an
election to receive dividends on their shares either in cash or reinvest them in
Common Stock held in the ESOP.

SPECIAL ACCOUNT

         For the years 1985 through 1989, the Companies received a tax deduction
for cash dividends paid to  participants  on ESOP shares in their Basic Account.
The Companies  contributed  to the ESOP an amount equal to the estimated  income
tax  benefit  of the  dividend  deduction  associated  with  shares in the Basic
Account.  Shares  of  Common  Stock  purchased  with  these  contributions  were
allocated to the  participants'  Special  Account.  All  participants  are fully
vested in these shares which can be withdrawn  when the  participants  terminate
employment.  Dividends on these shares are  automatically  reinvested  in Common
Stock held in the ESOP.

FIRST SUSPENSE ACCOUNT

         In 1989 the ESOP was  amended to enable the ESOP  Trustee  (as  defined
below) to  establish  a  leveraged  First  Suspense  Account.  Employees  become
eligible to participate after one year of service with the Companies.  The First
Suspense  Account  originally  consisted  of  633,849  shares  of  Common  Stock
purchased for the benefit of eligible ESOP  participants with proceeds from a 15
year $16.5 million loan (First Loan) bearing  interest at 9.125%.  This loan was
obtained by the ESOP Trustee on December 29, 1989,  and  guaranteed by Minnesota
Power.  The First  Suspense  Account  provides that as the First Loan is repaid,
shares of Common  Stock in the First  Suspense  Account  are  allocated  to each
participant's  account based on the ratio of a participant's annual compensation
to the annual  compensation of all  participants.  In any year that the value of
the  shares  credited  to a  participant's  account  is  less  than  2%  of  the
participant's  annual  compensation,  the Companies will  contribute  additional
shares to make up the  difference.  Shares of Common Stock are also allocated to
participants'  accounts for reinvested dividends paid on the shares in the First
Suspense Account.  All participants are fully vested after 5 years of continuous
service with the Companies.

                                       4




SECOND SUSPENSE ACCOUNT

         Minnesota  Power  amended  the ESOP  again in 1990 to  enable  the ESOP
Trustee  to  establish  a  leveraged  Second  Suspense  Account  and  borrow  an
additional  $75 million  (Second  Loan) for the purpose of  acquiring  2,830,188
newly  issued  shares of Common  Stock from  Minnesota  Power for the benefit of
active ESOP  participants  with a basic  account.  Under this  amendment  active
participants  with a Basic Account are allocated shares to their Special Account
with a value at least  equal to: (a)  dividends  payable on shares held by those
participants in the ESOP who do not elect to receive  dividends in cash, and (b)
tax savings  generated  from the  deductibility  of dividends paid on all shares
held in the ESOP as of August 4,  1989.  Pursuant  to this  amendment,  the ESOP
Trustee issued a promissory  note to Minnesota Power for $75 million at a 10.25%
interest rate with a term not to exceed 25 years.

         A participant  who resigns or is dismissed from  employment with any of
the Companies shall forfeit the nonvested portion of his or her ESOP accounts as
of the last day of the year in which the participant  incurs a fifth consecutive
one-year  break in service.  Forfeitures  will first be used by the ESOP to meet
the contribution of the 2% annual compensation requirement.  Second, forfeitures
will be allocated to the payment of expenses.  Third, remaining forfeitures,  if
any, will be  reallocated  to the accounts of remaining  participants  as of the
last day of the year in which the forfeiture occurs.


ADMINISTRATION

         The ESOP is  administered  for the  Companies by the  Employee  Benefit
Plans Committee (the Committee). The mailing address of the Committee is 30 West
Superior  Street,  Duluth,  Minnesota 55802. The Committee is authorized to make
rules and  regulations  as it may deem  necessary to carry out the provisions of
the ESOP and to employ  investment  managers  (as defined by ERISA),  attorneys,
accountants,  and such other persons as it shall deem  necessary or desirable in
the  administration  of the ESOP. The Committee  consists of 11 members who were
appointed by the Board of Directors of Minnesota  Power.  The Board of Directors
has the power to remove  members of the  Committee  from office.  Members of the
Committee receive no compensation for their services with respect to the ESOP.

         As of June 1, 1998 the  members  of the  Committee,  all  employees  of
Minnesota Power, and their respective titles are as follows:

          Name                                     Title
  -------------------      -----------------------------------------------------
  Robert D. Edwards        Executive Vice President
                           President - Minnesota Power Electric (1)
  David G. Gartzke         Senior Vice President - Finance
                           Chief Financial Officer
  Roger P. Engle           Vice President - Minnesota Power Electric
                           President - Superior Water, Light and Power Company
  Philip R. Halverson      Vice President, General Counsel and Secretary
  Donald J. Shippar        Senior Vice President - Minnesota Power Electric
  Claudia S. Welty         Vice President - Minnesota Power Electric
  Mark A. Schober          Controller
  Lori A. Collard          President - Electric Outlet, Inc.
  Brenda J. Flayton        Director - Minnesota Power Electric - Human Resources
  Alan R. Hodnik           Manager - Laskin Energy Center
  Jeweleon W. Tuominen     Manager -  Executive Compensation and Employee
                           Benefits

- ----------------------
(1) Committee Chairman

                                       5


         Mellon Bank N.A.  (Mellon Bank) acts as trustee (ESOP  Trustee) for the
ESOP.  The ESOP  Trustee's  main  office is located at One Mellon  Bank  Center,
Pittsburgh,  Pennsylvania  15258-0001.  The ESOP  Trustee  carries  blanket bond
insurance  in  the  amount  of  $200  million.  Minnesota  Power  maintains  the
participants'  records and issues quarterly reports to each participant  showing
the status of individual accounts.

ESOP TERMINATION

         The Companies reserve the right to reduce, suspend or discontinue their
contributions  to the ESOP or to terminate  the ESOP in its entirety  subject to
the provisions of ERISA. In the event that the ESOP is terminated, the Committee
may  require  that  the  accounts  of  all  participants  and  beneficiaries  be
distributed  as  soon  after  the  termination   date  as  the  Committee  deems
practicable, regardless of the length of time Common Stock has been allocated to
any account.

CONTRIBUTIONS

         The  Companies'  contribution  for each year  shall be paid to the ESOP
Trustee either in cash or in Common Stock.  Subject to a statutory maximum,  the
expenses  incidental to establishing and  administering the ESOP may be deducted
from the  Companies'  contributions  to the ESOP or income  earned by the shares
held in the ESOP.  Expenses not  attributable to such sources are payable by the
Companies. No fees or charges will be payable by any ESOP participant.

TRANSFERS

         Upon  retirement,  participants may elect to transfer the vested amount
of their ESOP account  balances to the Minnesota Power and Affiliated  Companies
Retirement Plan A or Plan B.



NOTE 2 - SUMMARY OF ACCOUNTING POLICIES

         The ESOP uses the accrual basis of accounting and accordingly  reflects
income in the year earned and expenses when incurred.  Investments  are reported
at their fair value based on quoted market price.

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management to (i) make estimates and
assumptions  that affect the reported  amounts of assets and  liabilities,  (ii)
disclose  contingent  liabilities  at the date of the financial  statements  and
(iii) report amounts of revenue and expense during the reporting period.  Actual
results could differ from those estimates.



NOTE 3 - FEDERAL INCOME TAX STATUS

         A favorable  determination  letter dated  January 30, 1996 was obtained
from the Internal Revenue Service stating that the ESOP, as amended and restated
effective  January 1, 1992,  qualifies as an employee stock ownership plan under
Section 401(a) of the Internal Revenue Code of 1986.

                                       6




NOTE 4 - INVESTMENTS
Number of Minnesota Power Common Stock Shares Cost Market ------------------------------------------------------------------------------------------------- Thousands December 31, 1997 Allocated 1,830 $ 39,200 $ 79,715 Unallocated 2,490 63,973 108,493 ----- ---------- ---------- 4,320 $ 103,173 $ 188,208 ===== ========== ========== December 31, 1996 Allocated 1,822 $ 36,281 $ 50,096 Unallocated 2,615 69,124 71,907 ----- ---------- ---------- 4,437 $ 105,405 $ 122,003 ===== ========== ==========
NOTE 5 - REPAYMENT OF LOANS The ESOP Trustee will repay principal and interest on the First Loan and Second Loan with dividends paid on the shares of Common Stock in each suspense account and with certain employer contributions to the ESOP. The shares of Common Stock acquired by the ESOP Trustee will be held in the First Suspense Account and Second Suspense Account, and allocated to the accounts of ESOP participants as the First Loan and Second Loan are repaid. Under current tax law, the Companies expect to realize tax savings from the two transactions. The First Loan was obtained from a third party lender and is guaranteed by the Companies with 319,483 unallocated shares of Common Stock pledged as collateral at December 31, 1997. Principal Payments $16.5 Million 9.125% Loan ----------------------------- Thousands 1998 $ 1,069 1999 1,260 2000 1,472 2001 1,708 2002 - 2004 5,768 --------- $ 11,277 ========= The Second Loan was obtained from Minnesota Power. There are 2,171,001 unallocated shares of Common Stock pledged as collateral at December 31, 1997. Prepayments can be made without penalty. Principal Payments $75 Million 10.25% Loan ----------------------------- Thousands 2011 $ 9,924 2012 15,000 2013 15,000 2014 15,000 2015 15,000 --------- $ 69,924 ========= 7 Schedule I MINNESOTA POWER AND AFFILIATED COMPANIES EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST SCHEDULE OF INVESTMENTS HELD DECEMBER 31, 1997 Thousands Description Cost Fair Value - -------------------------------------------------------------------------------- Minnesota Power, Inc. Common Stock * $103,173 $188,208 - ------------------- * Party-in-interest The above data was prepared from information certified as complete and accurate by Mellon Bank N.A., the ESOP Trustee. Schedule II MINNESOTA POWER AND AFFILIATED COMPANIES EMPLOYEE STOCK OWNERSHIP PLAN AND TRUST SCHEDULE OF TRANSACTIONS IN EXCESS OF 5% OF FAIR VALUE OF PLAN ASSETS FOR THE YEAR ENDED DECEMBER 31, 1997 Dollars in Thousands
Aggregate Purchase Price and Market Value on Number of Description of Purchases Transaction Dates Transactions - ------------------------------------------------------------------------------------------------------------------- Mellon Bank Temporary Investment Fund $3,595 198 Aggregate ---------------------------------- Net Cost of Sales Gain/ Number of Description of Sales Asset Price (Loss) Transactions - ------------------------------------------------------------------------------------------------------------------- Mellon Bank Temporary Investment Fund $3,257 $3,257 0 58 - ------------------ The above data was prepared from information certified as complete and accurate by Mellon Bank N.A., the ESOP Trustee.
8 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Employee Benefit Plans Committee has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized. Minnesota Power and Affiliated Companies Employee Stock Ownership Plan and Trust ---------------------------------------- (Name of Plan) June 24, 1998 By R.D. Edwards ---------------------------------------- R.D. Edwards Chairman, Employee Benefit Plans Committee 9