<Page>

                                                                 EXHIBIT 10.24

[WASHINGTON LOGO]


         LARRY L. MYERS
         Senior Vice President
         Human Resources



May 8, 2001



David L. Myers
Washington Group International Inc
720 Park Blvd.
Boise, ID 83712

Re:  Terms of Special Assignment

On behalf of Washington Group International Inc (the "Company"), I am writing to
document the terms of your change in employment assignment, which have been
approved by the Board of Directors.

1.       POSITION AND SERVICES TO BE RENDERED. The Company employed you as
         Executive Vice President - Corporate Affairs effective January 16,
         2001. Your primary responsibilities are to oversee the development and
         pursuit of the Company's claim against Raytheon Company (the "Raytheon
         Claim"). You will report to the Company's President, Stephen G. Hanks.

2.       SALARY. You will continue to receive the same annual base salary you
         were receiving as President of the Power Group, with any increases
         implemented since your assignment changed, payable in accordance with
         the Company's normal payroll practice (i.e., every two weeks). The
         Company will review your base salary annually, in accordance with
         standard Company practices, to determine any increase.

3.       ANNUAL BONUS. You will have a bonus target of 100% of your base salary,
         and your actual bonus will be determined at the end of each fiscal year
         by the Compensation Committee of the Board of Directors. At the end of
         the fiscal year in which you receive the Project Completion Bonus set
         forth in paragraph #5, the Compensation Committee may credit against
         the Annual Bonus due at the end of that year such portion of the
         Project Completion Bonus as the Committee in its sole discretion may
         determine.

4.       STOCK OPTIONS. You have been granted options to purchase 75,000 shares
         of the Company's common stock under the Company's Stock Option Plan at
         a price equal to the

<Page>

David L. Myers
Page 2
05/08/01


         per share closing price of the Company's common stock as of January 25,
         2001. Such options shall vest in four equal increments over four years
         beginning with the first anniversary of the date of grant and shall be
         subject to such additional conditions as the Covered Employees
         Subcommittee may impose.

5.       PROJECT COMPLETION BONUS. Upon completion of your special assignment in
         overseeing the Raytheon claim, you will be awarded a one-time lump sum
         project completion bonus of $500,000, and the option to purchase 75,000
         shares of the Company's common stock (referred to in paragraph 4 above)
         will immediately vest and you will have a 2-year period to exercise
         such options following the date of vesting. This project bonus will
         offset any other bonuses under the Company's bonus plans for the year
         in which the Project Completion Bonus is paid.

6.       APARTMENT. The Company will provide a furnished apartment for you in
         Boise as long as you are working on this special assignment. If the
         cost of providing the apartment is taxable to you, the Company will
         gross-up your compensation so as to make the cost of providing the
         apartment income tax neutral to you. In addition the Company will
         provide a one-time payment to you of $3000 as a furniture allowance to
         furnish the apartment.

7.       RELOCATION. The Company will pay travel expenses for you and your wife
         to find an apartment in Boise and in connection with closing out your
         residence in Boston. The Company also will reimburse you for the cost
         of moving the furnishings from your apartment in Boston partially to
         Boise and partially to California. The Company will also pay for the
         cost of shipping your car from Boston to California and for the cost
         of shipping household goods currently in storage in Boston to storage
         in California. The Company will also pay for the cost of storage of
         the household goods in California until your special assignment is
         complete or until you have moved into your new house in California
         that is currently under construction, whichever is shorter. Finally,
         the Company will pay the expenses connected with termination of the
         Boston apartment lease and furniture lease.

8.       FRINGE BENEFITS. You will continue to be entitled to participate in
         the Company's group plans and other benefits normally offered to
         full-time salaried employees. You also will continue to be a key
         employee of the Company, with the benefits available to key employees.

To indicate your acceptance of these terms of your special assignment, please
sign and return this letter as soon as possible. If you have any questions,
please do not hesitate to contact me.



<Page>

David L. Myers
Page 2
05/08/01


Sincerely,


/s/ Larry Myers

Larry Myers



AGREED AND ACCEPTED:


            /s/ David L. Myers                             8 May 01
-------------------------------------------          ---------------------
David L. Myers                                               Date