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 year ended December 31, 1999



                         Commission file number 33-14058



  A.  Full title of the plan and the address of the plan, if different from
      that of the issuer named below:

         Michael Baker Corporation Employee Stock Ownership Plan


  B.  Name of issuer of the securities held pursuant to the plan and the
      address of its principal executive office:

         Michael Baker Corporation
         Airport Office Park, Building 3
         420 Rouser Road
         Coraopolis, PA 15108









MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
FINANCIAL STATEMENTS AND ADDITIONAL INFORMATION
DECEMBER 31, 1999 AND 1998





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
INDEX TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------


Report of Independent Accountants


Financial Statements:

    Statements of Net Assets Available for Benefits -
      December 31, 1999 and 1998

    Statements of Changes in Net Assets Available for Benefits -
      Years Ended December 31, 1999 and 1998

    Notes to Financial Statements


Additional Information:*

    Schedule of Assets Held for Investment Purposes -
      December 31, 1999

    Schedule of Reportable Transactions -
      Year Ended December 31, 1999


















*  Other schedules required by Section  2520.103-10 of the Department of Labor's
   Rules and  Regulations  for  Reporting and  Disclosure  under ERISA have been
   omitted because they are not applicable.





                        REPORT OF INDEPENDENT ACCOUNTANTS


To the Participants and Administrator
of the Michael Baker Corporation
Employee Stock Ownership Plan

In our opinion, the accompanying statements of net assets available for benefits
and the  related  statements  of changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of the Michael Baker  Corporation  Employee  Stock  Ownership Plan (the Plan) at
December 31, 1999 and 1998, 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. 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 auditing  standards  generally  accepted in the
United  States  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 audits  were  conducted  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  Reportable  Transactions  are  presented  for the
purpose  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 and fund information are the  responsibility of the Plan's management.
The  supplemental  schedules  and fund  information  have been  subjected to the
auditing procedures applied in the audits 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.



/s/PricewaterhouseCoopers LLP
- -----------------------------
PricewaterhouseCoopers LLP
Pittsburgh, Pennsylvania
June 13, 2000





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
DECEMBER 31, 1999 AND 1998


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

                                                        DECEMBER 31,
                                                     1999            1998

          ASSETS
                                                          
Investments, at fair value:
  Investments in common stock of
    Michael Baker Corporation                    $ 23,808,516    $ 36,559,633
  Investments in mutual funds managed by
    Putnam Investments, Inc.                       77,592,519      54,339,202
  Participant loans (market value approximates
    cost)                                             249,998         118,029
                                                 ------------    ------------
      Total investments                           101,651,033      91,016,864
                                                 ------------    ------------
Receivables:
  Securities sold/accrued interest                      6,809         132,790
                                                 ------------    ------------
      Total receivables                                 6,809         132,790
                                                 ------------    ------------
      Total assets                                101,657,842      91,149,654
                                                 ------------    ------------

          LIABILITIES

Accounts Payable                                       11,192         112,881
                                                 ------------    ------------
      Total liabilities                                11,192         112,881
                                                 ------------    ------------
Net assets available for benefits                $101,646,650    $ 91,036,773
                                                 ------------    ------------
<FN>
The accompanying notes are an integral part of these financial statements.
</FN>





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
YEARS ENDED DECEMBER 31, 1999 AND 1998


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

                                                    1999             1998
                                                           
Additions to net assets attributed to:
  Investment income:
    Interest and dividends                      $  6,195,680     $  3,732,104
    Net appreciation (depreciation)
     in fair value of investments                 (1,665,087)       3,365,750
                                                -------------    -------------
     Total investment income                       4,530,593        7,097,854
                                                -------------    -------------

  Participant contributions                        9,205,299        6,985,999
  Employer contributions                           4,664,486        3,657,955
  Other                                                2,470               --
                                                -------------    -------------
     Total                                        13,872,255       10,643,954
                                                -------------    -------------
     Total additions                              18,402,848       17,741,808
                                                -------------    -------------

Deductions from net assets attributed to:
  Participant withdrawals                          7,101,485        6,256,322
  Rollovers                                          683,482               --
  Administrative fees                                  8,004            8,061
                                                -------------    -------------
     Total deductions                              7,792,971        6,264,383
                                                -------------    -------------
     Net increase                                 10,609,877       11,477,425
                                                -------------    -------------

Net assets available for benefits:
  Beginning of year                               91,036,773       79,559,348
                                                -------------    -------------
  End of year                                   $101,646,650     $ 91,036,773
                                                =============    =============

<FN>
The accompanying notes are an integral part of these financial statements.
</FN>







MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

1.   DESCRIPTION OF PLAN

     GENERAL
     The following  description of the Michael Baker  Employee  Stock  Ownership
     Plan  (the  ESOP,  or  the  Plan)   provides   only  general   information.
     Participants  should  refer  to the  Plan  agreement  for a  more  complete
     description of the Plan's provisions.

     The  ESOP  is a  defined  contribution  plan  that  provides  all  eligible
     employees of Michael Baker Corporation (the Company) with an opportunity to
     accumulate  additional  retirement  benefits  as well as invest in  Company
     stock. The Plan is subject to provisions of the Employee  Retirement Income
     Security Act of 1974, as amended (ERISA).

     PARTICIPANT  ACCOUNTS
     Each participant's account is credited with the participant's  contribution
     and  allocations of (a) the Company's  contribution  and (b) Plan earnings,
     and charged with an allocation of certain  administrative fees. Allocations
     are based on  participant  earnings or account  balances,  as defined.  The
     benefit to which a  participant  is  entitled  is the  benefit  that can be
     provided from the participant's vested account.

     CONTRIBUTIONS
     Participants  contribute  to the ESOP  through  a Section  401(k)  Employee
     Salary Redirection Election,  whereby the participants may choose to have a
     percentage  of  their  salaries   (including   commissions)   withheld  and
     contributed  to the ESOP up to the  annual  limitation  established  by the
     Internal  Revenue Service or 15 percent of the  participant's  salary.  The
     maximum  amount  of a  participant's  salary  which  may  be  eligible  for
     withholding for any Plan year cannot exceed $160,000.  The ESOP also allows
     participants  to roll over funds from a previous  employer's  tax-qualified
     plan or tax-qualified individual retirement account.

     During  1998 and 1999,  the Company  acquired  GeoResearch  Inc.  and Steen
     Production  Service,   Inc.,   respectively.   During  1999,  the  eligible
     participants made rollover  contributions to the Plan of approximately $1.6
     million.

     COMPANY MATCHING CONTRIBUTIONS
     Under  the  provisions  of the  Plan,  the  Company  will  make a  matching
     contribution to the  participants'  accounts in an amount of 100 percent of
     the first 5 percent and 50 percent of the next 1 percent of eligible salary
     contributed  by each  participant.  Salary amounts over the 6 percent limit
     are not required to be matched by the Company.  Effective  January 1, 1999,
     25 percent of the matching contribution is invested in the Company's Common
     Stock or Series B Common  Stock and 75 percent is  invested  in  accordance
     with the participants' investment elections for participant  contributions.
     From July 1, 1997,  through  December 31, 1998,  50 percent of the matching
     contribution  was invested in the Company's Common Stock or Series B Common
     Stock and 50 percent was  invested  in  accordance  with the  participants'
     investment elections for participant contributions.





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

     The Board of  Directors  of the Company is  authorized  to make  additional
     discretionary  contributions  to the ESOP  from time to time.  However,  no
     discretionary contributions were made in 1999 or 1998.

     VESTING
     Participants  are vested  immediately  in their  contributions  plus actual
     earnings thereon.  All amounts in the participants'  ESOP accounts that are
     attributable  to  the  transfer  of  funds  from  a  previously  terminated
     retirement  plan,  the rollover  from a previous  employer's  tax-qualified
     plan,   and   participant   contributions   are  100  percent   vested  and
     nonforfeitable at all times.

     All Company  matching  contributions  will  become 100 percent  vested upon
     attainment  of 3 years  of  service  with  the  Company  or  earlier,  upon
     attainment of normal retirement date, disability or death. If a participant
     leaves  employment  with the Company before  attaining a vested interest in
     his or her Company  contribution,  the contributions are forfeited and will
     reduce future Company matching contributions.

     DISTRIBUTIONS
     The Plan provides for distribution of benefits upon  retirement,  total and
     permanent  disability,  death,  or  termination of employment for any other
     reason.   The  amount  of  distribution  the  participant  or  his  or  her
     beneficiary is entitled to is based on the vesting  requirements  discussed
     above.  All  distributions  will be made in the form of a single,  lump-sum
     distribution or in substantially  equal annual  installments  over a period
     not exceeding 5 years.  Distributions  may be made in cash and/or shares of
     common stock, at the discretion of the participant.

     PARTICIPANT LOANS
     A  participant  may  borrow  money from the  portion of his or her  account
     attributable to his or her own 401(k) plan contributions. Participant loans
     may be obtained in the sole event of immediate  and heavy  financial  need,
     where the participant lacks other available  resources.  Loan amounts shall
     not exceed the  lesser  of:  (a) 50  percent  of the  participant's  vested
     interest  in  the   participant's   account,   (b)  $50,000   adjusted  for
     pre-existing  loans,  or (c) such amount as may be  determined  by the Plan
     Administrator.  All loans will be drawn against the  participant's  account
     among the respective investment options as directed, and are secured by the
     assets within the  participant's  accounts.  Interest  rates on outstanding
     notes receivable  ranged from 8.75 percent to 12.62 percent at December 31,
     1999.

     FORFEITED ACCOUNTS
     At December 31, 1999 and 1998, forfeited nonvested accounts totaled $67,968
     and $14,508,  respectively.  These  accounts  will be used to reduce future
     employer contributions. Also, in 1999 and 1998, employer contributions were
     reduced by $195,966 and $536,795,  respectively,  from forfeited  nonvested
     accounts.





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

     COMMON STOCK
     The ESOP enables  participating  employees to acquire an equity interest in
     Michael Baker Corporation (the Company); as such, contributions to the ESOP
     can be invested in the  Company's  common stock  (Common Stock and Series B
     Common Stock).

     The ESOP's  investment in the Company's  common stock  comprises  2,370,262
     (cost of $14,886,107) and 2,526,230 (cost of $15,455,695)  shares of Common
     Stock and 1,223,477 (cost of $7,436,107) shares of Series B Common Stock at
     December 31, 1999 and 1998, respectively.

     INVESTMENT OPTIONS
     Each  participant may direct Putnam  Investments,  Inc.  (Putnam) to invest
     certain  portions  of his or her  account in  investment  funds  managed by
     Putnam.  Investment  funds available to participants  are the Michael Baker
     Common Stock Fund (invests in common stock of the Company),  the Putnam New
     Opportunities  Fund (invests in long-term  growth  stocks  within  emerging
     industries),  Putnam  International  Growth Fund  (invests  in  diversified
     corporate stocks outside of North America), Putnam Voyager Fund (invests in
     diversified  corporate  stocks),  Putnam  Growth & Income Fund  (invests in
     long-term  growth  stocks),  George  Putnam  Fund  of  Boston  (invests  in
     diversified  capital  growth and current  income stocks and bonds),  Putnam
     Income Fund  (invests in corporate  bonds) and the Putnam Money Market Fund
     (invests  in  short-term   money  market   securities).   Contributions  by
     participants  cannot be further  directed  within the Michael  Baker Common
     Stock Fund. Additionally,  effective October 1, 1999, the following six new
     funds were added as investment  options to the Plan:  the Putnam Bond Index
     Fund  (investment  objective is to achieve a return that  approximates  the
     return of the Lehman Brothers  Aggregate Bond Index),  the Putnam Investors
     Fund  (invests in large  capitalization  stocks),  the Putnam S&P 500 Index
     (investment  objective is to achieve a return that  approximates the return
     of the S&P 500 Composite Stock Price Index) and the Putnam Asset Allocation
     Funds  (includes  the  Growth  Portfolio,  which has a  targeted  portfolio
     structure  designed to seek maximum growth of an investment  over time, the
     Balanced  Portfolio,  which seeks total return for  investors in their peak
     accumulation years and the Conservative Portfolio,  which invests primarily
     in domestic fixed-income securities).

     PLAN ADMINISTRATION AND FEES
     The Company provides certain  administrative and accounting services to the
     ESOP at no cost.  In  addition,  the  Company  pays  the  cost of  services
     provided to the ESOP by Putnam, legal counsel and independent  accountants.
     Certain reasonable distributions and loan processing fees charged by Putnam
     are deducted from the respective participant account balances.


2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     BASIS OF ACCOUNTING
     Putnam Investments,  Inc. (Putnam) performs the recordkeeping  function for
     the ESOP and the records are  maintained  on a cash  basis.  The  financial
     statements  included herein include all material  adjustments to record the
     financial  statements on the accrual basis of accounting in accordance with
     generally accepted accounting principles.





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

     Certain  plan  investments  are shares of mutual  funds  managed by Putnam.
     These transactions qualify as party-in-interest transactions.

     INVESTMENTS
     Investments  are stated at fair value based upon quoted market values.  The
     investment  in common  stock of the  Company  is stated at  publicly-traded
     closing  market values as of December 31, 1999 and 1998. As of December 31,
     1999 and 1998,  the ESOP owned  approximately  42 percent  and 44  percent,
     respectively,  of the  outstanding  shares of the  Company's  common stock;
     therefore,  such valuation  might be subject to significant  fluctuation in
     the event of a substantial  liquidation  of such holdings by the ESOP.  The
     accompanying  financial  statements  should be read in conjunction with the
     consolidated  financial  statements  of the Company,  which are included as
     Exhibit 13.1 to the Company's Annual Report on Form 10-K for the year ended
     December 31, 1999.

     The  difference  between the cost and current  market value of  investments
     purchased since the beginning of the period and the increase or decrease in
     such stated market value of investments held at the beginning of the period
     reported  is  included  in the  increase  (decrease)  in  net  appreciation
     (depreciation)  in fair market value of  investments  in the  Statements of
     Changes in Net Assets Available for Benefits.

     CONTRIBUTIONS
     Employee and employer contributions are recorded in the period during which
     the Company makes payroll deductions from Plan participant's earnings.

     DISTRIBUTIONS
     Distributions to participants are recorded when paid.

     USE OF ESTIMATES
     The  preparation  of financial  statements  in  conformity  with  generally
     accepted   accounting   principles  requires  management  to  make  certain
     estimates and assumptions  that may affect the reported  amounts of assets,
     liabilities and changes  therein,  and disclosure of contingent  assets and
     liabilities. Actual results could differ from those estimates.

     CONCENTRATION OF RISK
     Investments are exposed to various risks, such as interest rate, market and
     credit.  Due to the level of risk associated with these investments and the
     level of uncertainty  related to changes in the value of these investments,
     it is at least  reasonably  possible  that  changes  in the near term could
     materially affect  participants'  account balances and the amounts reported
     in the statement of net assets available for benefits and the statements of
     changes in net assets available for benefits.





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

3.   INVESTMENTS

     The  following  presents  the fair value of  investments  that  represent 5
     percent or more of the Plan's net assets at December 31, 1999:



                                                       DECEMBER 31,
                                                    1999           1998
                                                         
     Michael Baker Common stock                 $ 15,702,984*  $ 24,630,743*
     Michael Baker Series B common stock           8,105,532*    11,928,881*
     Putnam Growth & Income Fund                  17,530,241     17,930,008
     George Putnam Fund of Boston                  9,740,456     10,458,263
     Putnam New Opportunities Fund                21,841,935     10,584,799
     Putnam Voyager Fund                          15,355,912      7,599,581
     Putnam International Growth Fund              5,316,795      2,513,034

[FN]
     *Nonparticipant-directed
</FN>

     During  1999,  the  Plan's  investments  (including  gains  and  losses  on
     investments  bought and sold, as well as held during the year)  depreciated
     in value by $1,665,087 as follows:


                                                            
     Mutual funds                                              $  9,915,314
     Common stock                                               (11,580,401)
                                                               -------------
                                                               $ (1,665,087)
                                                               =============



4.   NONPARTICIPANT-DIRECTED INVESTMENTS

     Information  about the net assets  and the  significant  components  of the
     changes in net assets relating to the  nonparticipant-directed  investments
     is as follows:



                                                       DECEMBER 31,
                                                    1999          1998
                                                        
     Net Assets:
       Common stock                             $ 23,804,133  $ 36,579,542
                                                ------------  ------------

                                                $ 23,804,133  $ 36,579,542
                                                ============  ============





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------



                                                                YEAR ENDED
                                                               DECEMBER 31,
                                                                   1999
                                                            
     Changes in net assets:
       Contributions                                           $  2,108,667
       Rollovers                                                   (155,691)
       Dividends and interest                                         6,000
       Net appreciation(depreciation)                           (11,580,401)
       Benefits paid to participants                             (2,119,458)
       Transfers to participant-directed investments             (1,034,301)
       Fees                                                            (225)
                                                               -------------

                                                               $(12,775,409)
                                                               =============



5.   RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500

     The following is a reconciliation  of net assets available for benefits per
     the financial statements to the Plan's Form 5500 at December 31:



                                                    1999          1998
                                                         
     Net assets available for benefits per
       the financial statements                 $101,646,650   $ 91,036,773
     Amounts allocated to withdrawing
       participants                                     (982)       (72,285)
                                                -------------  -------------

     Net assets available for benefits per
       the Form 5500                            $101,645,668   $ 90,964,488
                                                =============  =============

     The following is a reconciliation  of distributions to participants per the
     financial statements to the Form 5500 at December 31, 1999:

     Distributions to participants per
       the financial statements                                $  7,101,485
       Add - Distributions to employees authorized
        but not paid as of December 31, 1999                            982
       Less - Distributions to employees authorized
        but not paid as of December 31, 1998                        (72,285)
                                                               -------------

     Distributions to employees per Form 5500                  $  7,030,182
                                                               =============






MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 1999 AND 1998
- --------------------------------------------------------------------------------

6.   TAX STATUS

     The Internal  Revenue  Service has determined and informed the Company by a
     letter  dated  December  30,  1994,  that the Plan and  related  trust  are
     designed in accordance with the applicable sections of the Internal Revenue
     Code (IRC).  The Plan has been amended since  receiving  the  determination
     letter. However, the Plan Administrator and the Plan's counsel believe that
     the Plan is designed and is currently  being  operated in  compliance  with
     applicable requirements of the IRC.


7.   PLAN TERMINATION

     Although it has not  expressed  an  intention to do so, the Company has the
     right under the Plan to discontinue  its  contributions  at any time and to
     terminate the Plan subject to the provisions of ERISA. In the event of Plan
     termination, participants will become 100 percent vested in their accounts.





MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
ADDITIONAL INFORMATION
SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES
DECEMBER 31, 1999


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

                                                   COST OF     CURRENT
 SHARES          DESCRIPTION                       ASSET       VALUE
- --------------------------------------------------------------------------------
                                                     

                *Michael Baker Corporation**
2,370,262        Common Stock                     $14,886,107 $ 15,702,984

                *Michael Baker Corporation**
1,223,477        Common Stock - Series B            7,436,107    8,105,532

  598,308       *George Putnam Fund of Boston                    9,740,456

  934,946       *Putnam Growth & Income Fund                    17,530,241

  277,479       *Putnam Income Fund                              1,764,768

  495,992       *Putnam Voyager Fund                            15,355,912

  240,127       *Putnam New Opportunities Fund                  21,841,935

  179,137       *Putnam International Growth Fund                5,316,795

5,036,730       *Putnam Money Market Fund                        5,036,730

    8,001       *Putnam Asset Allocation-Growth Portfolio          121,617

    2,970       *Putnam Asset Allocation-Balanced Portfolio         38,490

   10,840       *Putnam Asset Allocation-Conservative Portfolio    114,251

    7,181       *Putnam Bond Index Fund                             70,804

   11,489       *Putnam Investors Fund                             220,022

   12,607       *Putnam S&P 500 Index Fund                         440,498

    N/A         *Participant loans:
                 8.75% to 12.62%, due January 21,
                  2000 to September 12, 2014                       249,998
                                                              ------------
                                                              $101,651,033
                                                              ============

<FN>
 * Party-in-interest.
** Nonparticipant directed.
</FN>






MICHAEL BAKER CORPORATION
EMPLOYEE STOCK OWNERSHIP PLAN
ADDITIONAL INFORMATION
SCHEDULE OF REPORTABLE TRANSACTIONS
YEAR ENDED DECEMBER 31, 1999


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

                            NUMBER                               NET
PARTY        DESCRIPTION      OF       PURCHASE    SELLING       GAIN
INVOLVED     OF ASSET    TRANSACTIONS  PRICE       PRICE         (LOSS)
- --------------------------------------------------------------------------------
                                                 
Putnam       *Michael Baker   258     $2,811,968  $       --    $     --
Investments,  Corporation     384     $       --  $4,006,975    $512,704
Inc.          Common Stock**



[FN]
 * Party-in-interest.
** Nonparticipant directed.
</FN>








                                    SIGNATURE


Pursuant to the requirements of the Securities  Exchange Act of 1934, the Senior
Vice President, Corporate Controller and Treasurer of Michael Baker Corporation,
the plan  sponsor,  has duly  caused  this  annual  report  to be  signed by the
undersigned thereunto duly authorized.


                                    MICHAEL BAKER CORPORATION
                                    EMPLOYEE STOCK OWNERSHIP PLAN


Date:  June 21, 2000                /s/ CRAIG O. STUVER
                                    -------------------
                                    Craig O. Stuver
                                    Senior Vice President, Corporate
                                     Controller and Treasurer of Michael
                                     Baker Corporation, the Plan Sponsor