Document:

<PAGE>

                                                                     Exhibit 4.1

[TO COME]

COMMON STOCK                                                        COMMON STOCK
WNG _______                                                         SHARES

                                   [GRAPHIC]

INCORPORATED UNDER THE   MORRISON KNUDSEN CORPORATION     SEE REVERSE SIDE FOR
 LAWS OF THE STATE OF                                     CERTAIN DEFINITIONS
      DELAWARE                                            CUSIP 61844A 1D 9
                                                          THIS CERTIFICATE IS
                                                          TRANSFERABLE IN
                                                          MINNEAPOLIS, MINNESOTA
                                                          OR IN NEW YORK, NEW
                                                          YORK CUSIP 938862 10 9

     THIS CERTIFIES THAT

is the owner of
    fully paid and non-assessable shares of Common Stock, $.01 par value, of

                               NAME CHANGED TO:
                     WASHINGTON GROUP INTERNATIONAL, INC.

     Morrison Knudsen Corporation transferable on the books of the Corporation
by the holder hereof in person or by duly authorized attorney upon surrender of
this Certificate properly endorsed. This certificate is not valid unless
countersigned and registered by the Transfer Agent and Registrar.

Witness the facsimile signatures of its duly authorized officers
     Dated: _________________

     /s/ CRAIG G. TAYLOR                        /s/ DENNIS R. WASHINGTON
     SECRETARY                                  CHAIRMAN OF THE BOARD
                                                AND CHIEF EXECUTIVE OFFICER

COUNTERSIGNED AND REGISTERED
  WELLS FARGO BANK MINNESOTA, N.A.
          TRANSFER AGENT AND REGISTRAR

               AUTHORIZED SIGNATURE
<PAGE>

                                   [REVERSE]

THE CORPORATION WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER WHO SO REQUESTS
A STATEMENT OR SUMMARY OF THE POWERS, DESIGNATIONS, PREFERENCES AND RELATIVE,
PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OR SERIES
THEREOF AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS OF SUCH PREFERENCES
AND/OR RIGHTS SO FAR AS THE SAME HAVE BEEN FIXED AND DETERMINED.  ANY SUCH
REQUEST SHOULD BE ADDRESSED TO THE SECRETARY OF THE CORPORATION AT ITS PRINCIPAL
OFFICE OR TO THE TRANSFER AGENT NAMED ON THE FACE OF THIS CERTIFICATE.

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>

<S>                                             <C>
TEN COM - as tenants in common                  UNIF GIFT MIN ACT - .....................Custodian.....................
TEN ENT - as tenants by the entireties                                      (Cust)                       (Minor)
JT TEN  - as joint tenants with right of                            under Uniform Gifts to Minors
          survivorship and not as tenants                           Act ...............................................
          in common                                                                       (State)
                                                UNIF TRF MIN ACT -  ................Custodian (until age..............)
                                                                            (Cust)
                                                                    ............................under Uniform Transfers
                                                                               (Minor)
                                                                    to Minor's Act.....................................
</TABLE>

    ADDITIONAL ABBREVIATIONS MAY ALSO BE USED THOUGH NOT IN THE ABOVE LIST.

  FOR VALUE RECEIVED, _________________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR
OTHER IDENTIFYING NUMBER OF ASSIGNEE

_____________________________________

________________________________________________________________________________
   (PLEASE PRINT OR TYPE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________
________________________________________________________________________________
_________________________________________________________________________ Shares

of the common stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint  ____________________ Attorney,

to transfer the same on the books of the within named Corporation with full
power of substitution in the premises.

Dated: ________________

Signature(s) Guaranteed                    X ______________________________

By: __________________________________     X ______________________________
THE SIGNATURE(S) SHOULD BE GUARANTEED      NOTICE: THE SIGNATURE(S) TO THIS
BY AN ELIGIBLE GUARANTOR INSTITUTION       ASSIGNMENT MUST CORRESPOND WITH THE
(BANKS, STOCKBROKERS, SAVINGS AND LOAN     NAME(S) AS WRITTEN UPON THE FACE OF
ASSOCIATIONS AND CREDIT UNIONS WITH        THE CERTIFICATE IN EVERY PARTICULAR,
MEMBERSHIP IN AN APPROVED MEDALLION        WITHOUT ALTERATION OR ENLARGEMENT OR
SIGNATURE GUARANTEE PROGRAM),              ANY CHANGE WHATEVER
PURSUANT TO S.E.C. RULE 17A6-15.

                                       2<PAGE>

                                                                     Exhibit 4.2
                         WARRANTS NOT EXERCISED ON OR
                   BEFORE 5:00 P.M., NEW YORK CITY TIME, ON
                       MARCH 11, 2003 SHALL BECOME VOID
NUMBER                                                                  WARRANTS
W

                                    [LOGO]
                            [REGISTERED TRADEMARK]

THIS CERTIFICATE IS TRANSFERABLE
IN MINNEAPOLIS, MINNESOTA
OR IN NEW YORK, NEW YORK

                          MORRISON KNUDSEN CORPORATION

                              WARRANT CERTIFICATE

                                                               CUSIP 938862 11 7

This Warrant Certificate certifies that

, or registered assigns,
is the registered holder of                                        Warrants

                               NAME CHANGED TO:
                     WASHINGTON GROUP INTERNATIONAL, INC.

("the Warrants") expiring at 5:00 p.m., New York City time, on March 11, 2003
(the "Expiration Date"), to purchase Common Stock, $.01 par value per share (the
"Common Stock"), of MORRISON KNUDSEN CORPORATION, a Delaware corporation (the
"Company").  The warrants may be exercised at any time from 9:00 a.m., New York
City time, on September 11, 1996 to 5:00 p.m., New York City time, on the
Expiration Date.  Each Warrant entitles the holder upon exercise to receive from
the Company, if exercised before 5:00 p.m., New York City time, on the
Expiration Date, one fully paid and nonassessable share of Common Stock (a
"Warrant Share") at the Exercise Price (as defined in the Warrant Agreement
referred to below), payable in lawful money of the Untied States of America,
upon surrender of this Warrant Certificate and payment of the Exercise Price at
the office or agency of the Warrant Agent, but only subject to the conditions
set forth herein and in the Warrant Agreement.  The Exercise Price and number of
Warrant Shares issuable upon exercise of the Warrants are subject to adjustment
upon the occurrence of certain events as set forth in the Warrant Agreement.
<PAGE>

The Warrants evidenced by this Warrant Certificate are part of a duly authorized
issue of Warrants expiring on the Expiration Date entitling the holder on
exercise to receive shares of Common Stock of the Company and are issued or to
be issued pursuant to a Warrant Agreement dated as of September 11, 1996 (the
"Warrant Agreement"), duly executed and delivered by the Company to NORWEST BANK
MINNESOTA, N.A., a national banking association, as Warrant Agent (the "Warrant
Agent"), which Warrant Agreement is hereby incorporated by reference in and made
a part of this instrument and is hereby referred to for a description of the
rights, limitation of rights, obligations, duties and immunities thereunder of
the Warrant Agent, the Company and the holders (the words "holders" or "holder"
meaning the registered holders or registered holder) of the Warrants.  A copy of
the Warrant Agreement may be obtained by the holder hereof upon written request
to the Company.  By accepting initial delivery, transfer or exchange of this
Warrant, the duly registered holder shall be deemed to have agreed to the terms
of the Warrant Agreement as it may be in effect from time to time, including any
amendments or supplements duly adopted in accordance therewith.

The holder of Warrants evidenced by this Warrant Certificate may exercise them
by surrendering this Warrant Certificate, with the Purchase Form on the reverse
side hereof properly completed and executed, together with payment of the
Exercise Price in the manner described below at the office of the Warrant Agent.
In the event that upon any exercise of Warrants evidenced hereby the number of
Warrants exercised shall be less that the total number of Warrants evidenced
hereby, there shall be issued to the holder hereof or its assignee a new Warrant
Certificate evidencing the number of Warrants not exercised.

Payment of the Exercise Price may be made in cash by wire transfer to the
Warrant Agent for the account of the Company or by certified or official bank
check or checks to the order of the Company or by any combination thereof.

The Warrant Agreement provides that upon the occurrence of certain events the
number of shares of Common Stock issuable upon the exercise of each Warrant, and
the Exercise Price of each Warrant, may, subject to certain conditions, be
adjusted.  No fractions of a share of Common Stock will be issued upon the
exercise of any Warrant, but the Company shall pay the cash value thereof
determined as provided in the Warrant Agreement.

Warrant Certificates, when surrendered at the office of the Warrant Agent by the
registered holder thereof in person or by legal representative or attorney duly
authorized in writing, may be exchanged, in the manner and subject to the
limitations provided in the Warrant Agreement, but without payment of any
service charge, for another Warrant Certificate or Warrant Certificates of like
tenor evidencing in the aggregate a like number of Warrants.

Upon due presentation for registration of transfer of this Warrant Certificate
at the office of the Warrant Agent, a new Warrant Certificate or Warrant
Certificates of like tenor and evidencing in the aggregate a like number of
Warrants shall be issued to the transferee(s) in exchange for this Warrant
Certificate, subject to the limitations provided in the Warrant Agreement,
without charge except for any tax or other governmental charge imposed in
connection therewith.

The Company and the Warrant Agent may deem and treat the registered holder(s)
hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding any
notation of ownership or

                                       2
<PAGE>

other writing hereon made by anyone), for the purpose of any exercise hereof, of
any distribution to the holder(s) hereof, and for all other purposes, and
neither the Company nor the Warrant Agent shall be affected by any notice to the
contrary. Neither the Warrants nor this Warrant Certificate entitles any holder
to any rights of a stockholder of the Company.

This Warrant Certificate shall not be valid unless countersigned by the Warrant
Agent, as such term is used in the Warrant Agreement.

IN WITNESS WHEREOF, MORRISON KNUDSEN CORPORATION has caused this Warrant
Certificate to be duly executed.

Dated:                                  MORRISON KNUDSEN CORPORATION

<TABLE>
<S>                             <C>                             <C>
COUNTERSIGNED
  NORWEST BANK MINNESOTA, N.A.  Attest:                         By:
       AS WARRANT AGENT                 /s/ Craig G. Taylor         /s/ Dennis R. Washington

BY:    AUTHORIZED SIGNATORY                  SECRETARY                CHAIRMAN OF THE BOARD
                                                                   AND CHIEF EXECUTIVE OFFICER
</TABLE>
              - Registered Trademark - Jeffries Banknote Company

                                       3
<PAGE>

                                 PURCHASE FORM

     The undersigned hereby irrevocably elects to exercise this Warrant,
according to the terms and conditions hereof, to the extent of purchasing ____
shares of Common Stock and hereby makes payment of $____ in payment of the
exercise price thereof. If the number of shares shall not be all of the shares
purchasable under this Warrant, a new Warrant Certificate for the balance
remaining shall be issued in the name of the undersigned or its assignee as
indicated on the Assignment Form.

Dated: _____________

                     INSTRUCTIONS FOR REGISTRATION OF STOCK

Name: _____________________________________________________
      (please typewrite or print in block letters)

Address: __________________________________________________

                Signature(s): _____________________________

                              _____________________________

                              NOTICE: The signature(s) must correspond with the
                              name(s) as written upon the face of the
                              certificate in every particular, without
                              alteration or enlargement or any change whatever.

Signature(s) Guaranteed:

By:______________________________________
   The signature(s) should be guaranteed
   by an eligible guarantor institution
   (banks, stockbrokers, savings and loan
   associations and credit unions with
   membership in an approved medallion
   signature guarantee program), pursuant
   to S.E.C. Rule 17Ad-15.

                                  ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers
unto

Name: _____________________________________________________
      (please typewrite or print in block letters)

Address: __________________________________________________

its right to purchase ____ shares of Common Stock represented by this Warrant
and does hereby irrevocably constitute and appoint ____________________
Attorney, to transfer the same on the books of the Company, with full power of
substitution in the premises.

Dated: _____________

_____________________________        Signature(s): _____________________________

                                       4
<PAGE>

Social Security or other identifying number of
Assigns                                                 ________________________
                                                        NOTICE: The signature(s)
                                                        must correspond with the
                                                        name(s) as written upon
                                                        the face of the
                                                        certificate in every
                                                        particular, without
                                                        alteration or
                                                        enlargement or any
                                                        change whatever

Signature(s) Guaranteed:

By:____________________________________
The signature(s) should be guaranteed
by an eligible guarantor institution
(banks, stockbrokers, savings and
loan associations and credit unions
with membership in an approved
medallion signature guarantee program),
pursuant to S.E.C. Rule 17Ad-15.

                                       5

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00015-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00015-of-00352.parquet"}]]