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                                                                    Exhibit 10.2



                         MORRISON KNUDSEN CORPORATION


                                 $300,000,000


                       11% Senior Notes Due July 1, 2010



                         REGISTRATION RIGHTS AGREEMENT
                         -----------------------------

                                                                   June 28, 2000


Credit Suisse First Boston Corporation
BMO Nesbitt Burns Corp.
U.S. Bancorp Libra, a division of
  U.S. Bancorp Investments, Inc.
c/o Credit Suisse First Boston Corporation
  Eleven Madison Avenue
  New York, New York 10010-3629

Ladies and Gentlemen:

     Morrison Knudsen Corporation, a Delaware corporation (the "Issuer"),
proposes to issue and sell to Credit Suisse First Boston Corporation, BMO
Nesbitt Burns Corp. and U.S. Bancorp Libra, a division of U.S. Bancorp
Investments, Inc. (collectively, the "Initial Purchasers"), upon the terms set
forth in a purchase agreement of even date herewith (the "Purchase Agreement"),
$300,000,000 aggregate principal amount of its 11% Senior Notes Due July 1, 2010
(the "Notes") to be unconditionally guaranteed on a senior unsecured basis (the
"Guaranties") by each of the Issuer's subsidiaries listed on Schedule A hereto
of the Purchase Agreement (the "Guarantors" and, collectively with the Issuer,
the "Company"). The Notes will also be guaranteed on a senior unsecured basis by
each existing and subsequently organized domestic subsidiary of the Issuer that
becomes a guarantor pursuant to the Indenture (as defined). The Notes and the
Guaranties are together referred to as the "Initial Securities". The Initial
Securities will be issued pursuant to an indenture, dated as of July 1, 2000
(the "Indenture"), among the Issuer, the Guarantors and United States Trust
Company of New York, as trustee (the "Trustee"). As an inducement to the Initial
Purchasers to enter into the Purchase Agreement, the Company agrees with the
Initial Purchasers, for the benefit of the Initial Purchasers and the holders
of the Securities (as defined below) (collectively the "Holders"), as follows:

     1.   Registered Exchange Offer. Unless not permitted by applicable law
(after the Company has complied with the ultimate paragraph of this Section 1),
the Company shall prepare and, not later than 75 days (such 75th day being a
"Filing Deadline") after the date on which the Initial Purchasers purchase
the Initial Securities pursuant to the Purchase Agreement (the "Closing Date"),
file with the Securities and Exchange Commission (the "Commission") a
registration statement (the "Exchange Offer Registration Statement") on an
appropriate form under the Securities Act of 1933, as amended (the "Securities
Act"), with respect to a proposed offer (the "Registered Exchange Offer") to the
Holders of Transfer Restricted Securities (as defined in Section 6 hereof), who
are not prohibited by any law or policy of the Commission from participating in
the Registered Exchange Offer, to issue and deliver to such Holders, in exchange
for the Initial Securities, a like aggregate principal amount of debt
securities of the Company issued under the Indenture, identical in all material
respects to the Initial Securities and registered under the Securities Act (the
"Exchange Securities"). The Company shall use its best efforts to (i) cause such
Exchange Offer Registration Statement to become effective under the Securities
Act within 150 days after the Closing Date (such 150th day being an
"Effectiveness Deadline") and (ii) keep the Exchange Offer Registration
Statement effective for not less than 20 Business Days (or longer, if required
by applicable law) after the date notice of the Registered Exchange Offer is
mailed to the Holders (such period being called the "Exchange Offer
Registration Period"). "Business Days" means any day that is not a Saturday, a
Sunday or a day on which banking institutions are not required to be open in
the State of New York.

     If the Company commences the Registered Exchange Offer, the Company (i)
will be entitled to consummate the Registered Exchange Offer 20 Business Days
after such commencement (provided that the Company has accepted all the Initial
Securities theretofore validly tendered in accordance with the
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terms of the Registered Exchange Offer) and (ii) will be required to consummate
the Registered Exchange Offer no later than 40 days after the date on which the
Exchange Offer Registration Statement is declared effective (such 40th day being
the "Consummation Deadline").

     Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Registered
Exchange Offer, it being the objective of such Registered Exchange Offer to
enable each Holder of Transfer Restricted Securities electing to exchange the
Initial Securities for Exchange Securities (assuming that such Holder is not an
affiliate of the Company within the meaning of the Securities Act, acquires the
Exchange Securities in the ordinary course of such Holder's business and has no
arrangements with any person to participate in the distribution of the Exchange
Securities and is not prohibited by any law or policy of the Commission from
participating in the Registered Exchange Offer) to trade such Exchange
Securities from and after their receipt without any limitations or restrictions
under the Securities Act and without material restrictions under the securities
laws of the several states of the United States.

     The Company acknowledges that, pursuant to current interpretations by the
Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Initial Securities, acquired for its own account as a
result of market making activities or other trading activities, for Exchange
Securities (an "Exchanging Dealer"), is required to deliver a prospectus
containing the information set forth in (a) Annex A hereto on the cover, (b)
Annex B hereto in the "Exchange Offer Procedures" section and the "Purpose of
the Exchange Offer" section, and (c) Annex C hereto in the "Plan of
Distribution" section of such prospectus in connection with a sale of any such
Exchange Securities received by such Exchanging Dealer pursuant to the
Registered Exchange Offer and (ii) an Initial Purchaser that elects to sell
Securities (as defined below) acquired in exchange for Initial Securities
constituting any portion of an unsold allotment, is required to deliver a
prospectus containing the information required by Items 507 or 508 of
Regulation S-K under the Securities Act, as applicable, in connection with such
sale.

     The Company shall use its best efforts to keep the Exchange Offer
Registration Statement effective and to amend and supplement the prospectus
contained therein, in order to permit such prospectus to be lawfully delivered
by all persons subject to the prospectus delivery requirements of the
Securities Act for such period of time as such persons must comply with such
requirements in order to resell the Exchange Securities; provided, however, that
                                                         --------  -------
(i) in the case where such prospectus and any amendment or supplement thereto
must be delivered by an Exchanging Dealer or an Initial Purchaser, such period
shall be the lesser of 180 days after the consummation of the Registered
Exchange Offer and the date on which all Exchanging Dealers and the Initial
Purchasers have sold all Exchange Securities held by them (unless such period is
extended pursuant to Section 3(j) below) and (ii) the Company shall make such
prospectus and any amendment or supplement thereto available to any broker-
dealer for use in connection with any resale of any Exchange Securities for a
period of not less than 180 days after the consummation of the Registered
Exchange Offer.

     If, upon consummation of the Registered Exchange Offer, any Initial
Purchaser holds Initial Securities acquired by it as part of its initial
distribution, the Company, simultaneously with the delivery of the Exchange
Securities pursuant to the Registered Exchange Offer, shall issue and deliver to
such Initial Purchaser upon the written request of such Initial Purchaser, in
exchange (the "Private Exchange") for the Initial Securities held by such
Initial Purchaser, a like principal amount of debt securities issued by the
Company under the Indenture and guaranteed by the Guarantors and identical in
all material respects to the Initial Securities (the "Private Exchange
Securities"). The Initial Securities, the Exchange Securities and the Private
Exchange Securities are herein collectively called the "Securities".

     In connection with the Registered Exchange Offer, the Company shall:

          (a)  mail to each Holder a copy of the prospectus forming part of the
     Exchange Offer Registration Statement, together with an appropriate
letter of transmittal and related documents;

          (b)  keep the Registered Exchange Offer open for not less than 20
     Business Days (or longer, if required by applicable law) after the date
     notice thereof is mailed to the Holders;

          (c)  utilize the services of a depositary for the Registered Exchange
     Offer with an address in the Borough of Manhattan, The City of New York,
     which may be the Trustee or an affiliate of the Trustee;

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          (d)  permit Holders to withdraw tendered Securities at any time prior
     to the close of business, New York time, on the last business day on which
     the Registered Exchange Offer shall remain open; and

          (e)  otherwise comply with all applicable laws.

     As soon as practicable after the close of the Registered Exchange Offer or
the Private Exchange, as the case may be, the Company shall:

          (x)  accept for exchange all the Initial Securities validly tendered
     and not withdrawn pursuant to the Registered Exchange Offer and the Private
     Exchange;

          (y)  deliver to the Trustee for cancellation all the Initial
     Securities so accepted for exchange; and

          (z)  cause the Trustee to authenticate and deliver promptly to each
     Holder of the Initial Securities, Exchange Securities or Private Exchange
     Securities, as the case may be, equal in principal amount to the Initial
     Securities of such Holder so accepted for exchange.

     The Indenture will provide that the Exchange Securities will not be subject
to the transfer restrictions set forth in the Indenture and that all the
Securities will vote and consent together on all matters as one class and that
none of the Securities will have the right to vote or consent as a class
separate from one another on any matter.

     Interest on each Exchange Security and Private Exchange Security issued
pursuant to the Registered Exchange Offer and in the Private Exchange will
accrue from the last interest payment date on which interest was paid on the
Initial Securities surrendered in exchange therefor or, if no interest has been
paid on the Initial Securities, from the date of original issue of the
Initial Securities.

     Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of
the Registered Exchange Offer (i) any Exchange Securities received by such
Holder will be acquired in the ordinary course of business, (ii) such Holder
will have no arrangements or understanding with any person to participate in
the distribution of the Securities within the meaning of the Securities Act,
(iii) such Holder is not an "affiliate," as defined in Rule 405 of the
Securities Act, of the Company or if it is an affiliate, such Holder will
comply with the registration and prospectus delivery requirements of the
Securities Act to the extent applicable, (iv) if such Holder is not a broker-
dealer, that it is not engaged in, and does not intend to engage in, the
distribution of the Exchange Securities and (v) if such Holder is a broker-
dealer, that it will receive Exchange Securities for its own account in
exchange for Initial Securities that were acquired as a result of market-making
activities or other trading activities and that it will be required to
acknowledge that it will deliver a prospectus in connection with any resale
of such Exchange Securities.

     Notwithstanding any other provisions hereof, the Company will ensure that
(i) any Exchange Offer Registration Statement and any amendment thereto and
any prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

     If following the date hereof there has been announced a change in
Commission policy with respect to exchange offers that in the reasonable opinion
of counsel to the Company raises a substantial question as to whether the
Registered Exchange Offer is permitted by applicable federal law, the Company
will seek a no-action letter or other favorable decision from the Commission
allowing the Company to consummate the Registered Exchange Offer.  The Company
will pursue the issuance of such a decision to the Commission staff level.  In
connection with the foregoing, the Company will take all such other actions as
may be requested by the Commission or otherwise required in connection with the
issuance of such decision, including without limitation (i) participating in
telephonic conferences with the Commission, (ii) delivering to the Commission
staff an analysis prepared by counsel to the Company setting forth the legal
bases, if any, upon which such counsel has concluded that the Registered
Exchange

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Offer should be permitted and (iii) diligently pursuing a resolution (which need
not be favorable) by the Commission staff.

     2.  Shelf Registration.  If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Company
is not permitted to effect a Registered Exchange Offer, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offer is not consummated by the
150th day after the Closing Date, (iii) any Initial Purchaser so requests with
respect to the Initial Securities (or the Private Exchange Securities) not
eligible to be exchanged for Exchange Securities in the Registered Exchange
Offer and held by it following consummation of the Registered Exchange Offer or
(iv) any Holder (other than an Exchanging Dealer) is not eligible to participate
in the Registered Exchange Offer or, in the case of any Holder (other than an
Exchanging Dealer) that participates in the Registered Exchange Offer, such
Holder does not receive freely tradeable Exchange Securities on the date of the
exchange and any such Holder so requests, the Company shall take the following
actions (the date on which any of the conditions described in the foregoing
clauses (i) through (iv) occur, including in the case of clauses (iii) or (iv)
the receipt of the required notice, being a "Trigger Date"):

          (a)  The Company shall promptly  (but in no event more than 45 days
     after the Trigger Date (such 45th day being a "Filing Deadline")) file with
     the Commission and thereafter use its best efforts to cause to be declared
     effective no later than 140 days after the Trigger Date (such 140th day
     being an "Effectiveness Deadline") a registration statement (the "Shelf
     Registration Statement" and, together with the Exchange Offer Registration
     Statement, a "Registration Statement") on an appropriate form under the
     Securities Act relating to the offer and sale of the Transfer Restricted
     Securities by the Holders thereof from time to time in accordance with the
     methods of distribution set forth in the Shelf Registration Statement and
     Rule 415 under the Securities Act (hereinafter, the "Shelf Registration");
     provided, however, that no Holder (other than an Initial Purchaser) shall
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     be entitled to have the Securities held by it covered by such Shelf
     Registration Statement unless such Holder agrees in writing to be bound by
     all the provisions of this Agreement applicable to such Holder.

          (b)  The Company shall use its best efforts to keep the Shelf
     Registration Statement continuously effective in order to permit the
     prospectus included therein to be lawfully delivered by the Holders of the
     relevant Securities, for a period of two years (or for such longer period
     if extended pursuant to Section 3(j) below) from the date of its
     effectiveness or such shorter period that will terminate when all the
     Securities covered by the Shelf Registration Statement (i) ha ve been sold
     pursuant thereto or (ii) are no longer restricted securities (as defined in
     Rule 144 under the Securities Act, or any successor rule thereof). The
     Company shall be deemed not to have used its best efforts to keep the Shelf
     Registration Statement effective during the requisite period if it
     voluntarily takes any action that would result in Holders of Securities
     covered thereby not being able to offer and sell such Securities during
     that period, unless such action is require d by applicable law.

          (c)  Notwithstanding any other provisions of this Agreement to the
     contrary, the Company shall cause the Shelf Registration Statement and the
     related prospectus and any amendment or supplement thereto, as of the
     effective date of the Shelf Registration Statement, amendment or
     supplement, (i) to comply in all material respects with the applicable
     requirements of the Securities Act and the rules and regulations of the
     Commission and (ii) not to contain any untrue statement of a material fact
     or omit to state a material fact required to be stated therein or
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made, not misleading.

     3.  Registration Procedures. In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent applicable, any Registered
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

          (a)  The Issuer shall (i) furnish to each Initial Purchaser, prior to
     the filing thereof with the Commission, a copy of the Registration
     Statement and each amendment thereof and each supplement, if any, to the
     prospectus included therein and, in the event that an Initial Purchaser
     (with respect to any portion of an unsold allotment from the original
     offering) is participating in the Registered Exchange Offer or the Shelf
     Registration Statement, the Company shall use its best efforts to reflect
     in each such document, when so filed with the Commission, such comments as
     such Initial Purchaser reasonably may propose; (ii) include the information
     set forth in Annex A here to on the cover, in Annex B hereto in the
     "Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
     section and in Annex C hereto in the "Plan of Distribution" section of the
     prospectus forming a part of the Exchange Offer Registration

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     Statement and include the information set forth in Annex D hereto in the
     Letter of Transmittal delivered pursuant to the Registered Exchange Offer;
     (iii ) if requested by an Initial Purchaser, include the information
     required by Items 507 or 508 of Regulation S-K under the Securities Act, as
     applicable, in the prospectus forming a part of the Exchange Offer
     Registration Statement; (iv) include within the prospectus contained in
     the Exchange Offer Registration Statement a section entitled "Plan of
     Distribution," reasonably acceptable to the Initial Purchasers, which shall
     contain a summary statement of the positions taken or policies made by the
     staff of the Commission with respect to the potential "underwriter" status
     of any broker-dealer that is the beneficial owner (as defined in Rule 13d-3
     under the Securities Exchange Act of 1934, as amended (the "Exchange Act
     ")) of Exchange Securities received by such broker-dealer in the Registered
     Exchange Offer (a "Participating Broker-dealer"), whether such positions or
     policies have been publicly disseminated by the staff of the Commission or
     such positions or policies, in the reasonable judgment of the Initial
     Purchasers based upon advice of counsel (which may be in-house counsel),
     represent the prevailing views of the staff of the Commission; and (v) in
     the case of a Shelf Registration Statement, include the names of the
     Holders who propose to sell Securities pursuant to the Shelf Registration
     Statement as selling securityholders.

          (b)  The Issuer shall give written notice to the Initial Purchasers,
     the Holders of the Securities and any Participating Broker-Dealer from whom
     the Company has received prior written notice that it will be a
     Participating Broker-Dealer in the Registered Exchange Offer (which notice
     pursuant to clauses (ii)-(v) hereof shall be accompanied by an instruction
     to suspend the use of the prospectus until the requisite changes have been
     made):

                 (i)   when the Registration Statement or any amendment thereto
          has been filed with the Commission and when the Registration Statement
          or any post-effective amendment thereto has become effective;

                 (ii)  of any request by the Commission for amendments or
          supplements to the Registration Statement or the prospectus included
          therein or for additional information;

                 (iii) of the issuance by the Commission of any stop order
          suspending the effectiveness of the Registration Statement or the
          initiation of any proceedings for that purpose;

                 (iv) of the receipt by the Company or its legal counsel of any
          notification with respect to the suspension of the qualification of
          the Securities for sale in any jurisdiction or the initiation or
          threatening of any proceeding for such purpose; and

                 (v)  of the happening of any event that requires the Company to
          make changes in the Registration Statement or the prospectus in order
          that the Registration Statement or the prospectus does not contain an
          untrue statement of a material fact nor omit to state a material fact
          required to be stated therein or necessary to make the statements
          therein (in the case of the prospectus, in the light of the
          circumstances under which they were made) not misleading.

          (c)  The Company shall make every reasonable effort to obtain the
     withdrawal at the earliest possible time, of any order suspending the
     effectiveness of the Registration Statement.

          (d)  The Issuer shall furnish to each Holder of Securities included
     within the coverage of the Shelf Registration, without charge, at least
     one copy of the Shelf Registration Statement and any post-effective
     amendment thereto, including financial statements and schedules, and, if
     the Holder so requests in writing, all exhibits thereto (including those,
     if any, incorporated by reference).

          (e)  The Issuer shall deliver to each Exchanging Dealer and each
     Initial Purchaser, and to any other Holder who so requests, without charge,
     at least one copy of the Exchange Offer Registration Statement and any
     post-effective amendment thereto, including financial statements and
     schedules, and, if any Initial Purchaser or any such Holder requests, all
     exhibits thereto (including those incorporated by reference).

          (f)  The Issuer shall, during the Shelf Registration Period, deliver
     to each Holder of Securities included within the coverage of the Shelf
     Registration, without charge, as many copies of the prospectus (including
     each preliminary prospectus) included in the Shelf

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     Registration Statement and any amendment or supplement thereto as such
     person may reasonably request. The Company consents, subject to the
     provisions of this Agreement, to the use of the prospectus or any amendment
     or supplement thereto by each of the selling Holders of the Securities in
     connection with the offering and sale of the Securities covered by the
     prospectus, or any amendment or supplement thereto, included in the Shelf
     Registration Statement.

          (g)  The Issuer shall deliver to each Initial Purchaser, any
     Exchanging Dealer, any Participating Broker-Dealer and such other persons
     required to deliver a prospect us following the Registered Exchange Offer,
     without charge, as many copies of the final prospectus included in the
     Exchange Offer Registration Statement and any amendment or supplement
     thereto as such persons may reasonably request. The Company consents,
     subject to the provisions of this Agreement, to the use of the prospectus
     or any amendment or supplement thereto by any Initial Purchaser, if
     necessary, any Participating Broker-Dealer and such other persons required
     to deliver a prospectus following the Registered Exchange Offer in
     connection with the offering and sale of the Exchange Securities covered by
     the prospectus, or any amendment or supplement thereto, included in such
     Exchange Offer Registration Statement.

          (h)  Prior to any public offering of the Securities pursuant to any
     Registration Statement, the Company shall register or qualify or cooperate
     with the Holders of the Securities included therein and their respective
     counsel in connection with the registration or qualification of the
     Securities for offer and sale under the securities or "blue sky" laws of
     such states of the United States as any Holder of the Securities reasonably
     requests in writing and do any and all other acts or things necessary or
     advisable to enable the offer and sale in such jurisdictions of the
     Securities covered by such Registration Statement; provided, however, that
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     the Company shall not be required to (i) qualify generally to do business
     in any jurisdiction where it is not then so qualified or (ii) take any
     action which would subject it to general service of process or to taxation
     in any jurisdiction where it is not then so subject.

          (i)  The Company shall cooperate with the Holders of the Securities to
     facilitate the timely preparation and delivery of certificates representing
     the Securities to be sold pursuant to any Registration Statement free of
     any restrictive legends and in such denominations and registered in such
     names as the Holders may request a reasonable period of time prior to
     sales of the Securities pursuant to such Registration Statement.

          (j)  Upon the occurrence of any event contemplated by paragraphs (ii)
     through (v) of Section 3(b) above during the period for which the Company
     is required to maintain an effective Registration Statement, the Company
     shall promptly prepare and file a post-effective amendment to the
     Registration Statement or a supplement to the related prospectus and any
     other required document so that, as thereafter delivered to Holders of the
     Securities or purchasers of Securities, the prospectus will not contain an
     untrue statement of a material fact or omit to state any material fact
     required to be stated therein or necessary to make the statements therein,
     in the light of the circumstances under which they were made, not
     misleading. If the Company notifies the Initial Purchasers, the Holders of
     the Securities and any known Participating Broker-Dealer in accordance with
     paragraphs (ii) through (v) of Section 3(b) above to suspend the use of the
     prospectus until the requisite changes to the prospectus have been made,
     then the Initial Purchasers, the Holders of the Securities and any such
     Participating Broker-Dealers shall suspend use of such prospectus, and the
     period of effectiveness of the Shelf Registration Statement provided for in
     Section 2(b) above and the Exchange Offer Registration Statement provided
     for in Section 1 above shall each be extended by the number of days from
     and including the date of the giving of such notice to and including the
     date when the Initial Purchasers, the Holders of the Securities and any
     known Participating Broker-Dealer shall have received such amended or
     supplemented prospectus pursuant to this Section 3(j).

          (k)  Not later than the effective date of the applicable Registration
     Statement, the Company will provide a CUSIP number for the Initial
     Securities, the Exchange Securities or the Private Exchange Securities, as
     the case may be, and provide the applicable trustee with printed
     certificates for the Initial Securities, the Exchange Securities or the
     Private Exchange Securities, as the case may be, in a form eligible for
     deposit with The Depository Trust Company.

          (l)  The Company will comply with all rules and regulations of the
     Commission to the extent and so long as they are applicable to the
     Registered Exchange Offer or the Shelf Registration, and the will Issuer
     make generally available to its security holders (or otherwise provide
     in accordance with Section 11(a) of the Securities Act) an earnings
     statement satisfying

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     the provisions of Section 11(a) of the Securities Act, no later than 45
     days after the end of a 12-month period (or 90 days, if such period is a
     fiscal year) beginning with the first month of the Issuer's first fiscal
     quarter commencing after the effective date of the Registration Statement,
     which statement shall cover such 12-month period.

          (m)  The Company shall cause the Indenture to be qualified under the
     Trust Indenture Act of 1939, as amended, in a timely manner and containing
     such changes, if any, as shall be necessary for such qualification. In the
     event that such qualification would require the appointment of a new
     trustee under the Indenture, the Company shall appoint a new trustee
     thereunder pursuant to the applicable provisions of the Indenture.

          (n)  The Company may require each Holder of Securities to be sold
     pursuant to the Shelf Registration Statement to furnish to the Company such
     information regarding the Holder and the distribution of the Securities as
     the Company may from time to time reasonably require for inclusion in the
     Shelf Registration Statement, and the Company may exclude from such
     registration the Securities of any Holder that unreasonably fails to
     furnish such information within a reasonable time after receiving such
     request.

          (o)  The Company shall enter into such customary agreements
     (including, if requested, an underwriting agreement in customary form) and
     take all such other action, if any, as any Holder of the Securities shall
     reasonably request in order to facilitate the disposition of the Securities
     pursuant to any Shelf Registration.

          (p)  In the case of any Shelf Registration, the Company shall (i) make
     reasonably available for inspection by the Holders of the Securities, any
     underwriter participating in any disposition pursuant to the Shelf
     Registration Statement and any attorney, accountant or other agent retained
     by the Holders of the Securities or any such underwriter all relevant
     financial and other records, pertinent corporate documents and properties
     of the Company and (ii) cause the Company's officers, directors, employees,
     accountants and auditors to supply all relevant information reasonably
     requested by the Holders of the Securities or any such underwriter,
     attorney, accountant or agent in connection with the Shelf Registration
     Statement, in each case, as shall be reasonably necessary to enable such
     persons, to conduct a reasonable investigation within the meaning of
     Section 11 of the Securities Act; provided, however, that the foregoing
                                       --------  -------
     inspection and information gathering shall be coordinated on behalf of the
     Initial Purchasers by you and on behalf of the other parties, by one
     counsel designated by and on behalf of such other parties as described in
     Section 4 hereof.

          (q)  In the case of any Shelf Registration, the Company, if requested
     by any Holder of Securities covered thereby, shall cause (i) its counsel to
     deliver an opinion and updates thereof relating to the Securities in
     customary form addressed to such Holders and the managing underwriters, if
     any, thereof and dated, in the case of the initial opinion, the effective
     date of such Shelf Registration Statement (it being agreed that the
     matters to be covered by such opinion shall include, without limitation,
     the due incorporation and good standing of the Company and its
     subsidiaries; the qualification of the Company and its subsidiaries to
     transact business as foreign corporations in identified jurisdictions; the
     due authorization, execution and delivery of the relevant agreement of the
     type referred to in Section 3(o) hereof; the due authorization, execution,
     authentication and issuance, and the validity and enforceability, of the
     applicable Securities; the absence of material legal or governmental
     proceedings involving the Company and its subsidiaries; the absence of
     governmental approvals required to be obtained in connection with the Shelf
     Registration Statement, the offering and sale of the applicable Securities,
     or any agreement of the type referred to in Section 3(o) hereof; the
     compliance as to form of such Shelf Registration Statement and any
     documents incorporated by reference therein and of the Indenture with the
     requirements of the Securities Act and the Trust Indenture Act,
     respectively; and, as of the date of the opinion and as of the effective
     date of the Shelf Registration Statement or most recent post-effective
     amendment thereto, as the case may be, the absence from such Shelf
     Registration Statement and the prospectus included therein, as then amended
     or supplemented, and from any documents incorporated by reference therein
     of an untrue statement of a material fact or the omission to state therein
     a material fact required to be stated therein or necessary to make the
     statements therein not misleading (in the case of any such documents, in
     the light of the circumstances existing at the time that such documents
     were filed with the Commission under the Exchange Act); (ii) its officers
     to execute and deliver all customary documents and certificates and updates
     thereof requested by any underwriters of the applicable Securities and
     (iii) its independent public accountants and the independent public
     accountants with respect to any other entity for which financial
     information is provided in the

                                       7
<PAGE>

     Shelf Registration Statement to provide to the selling Holders of the
     applicable Securities and any underwriter therefor a comfort letter in
     customary form and covering matters of the type customarily covered in
     comfort letters in connection with primary underwritten offerings,
     subject to receipt of appropriate documentation as contemplated and, only
     if permitted, by Statement of Auditing Standards No. 72.

          (r)  In the case of the Registered Exchange Offer, if requested by any
     Initial Purchaser or any known Participating Broker-Dealer, the Company
     shall cause (i) its counsel to deliver to such Initial Purchaser or such
     Participating Broker-Dealer a signed opinion in the form set forth in
     Sections 6(e) and 6(f) of the Purchase Agreement with such changes as are
     customary in connection with the preparation of a Registration Statement
     and (ii) its independent public accountants and the independent public
     accountants with respect to any other entity for which financial
     information is provided in the Registration Statement to deliver to such
     Initial Purchaser or such Participating Broker-Dealer a comfort letter, in
     customary form, meeting the requirements as to the substance thereof as set
     forth in Section 6(a) of the Purchase Agreement, with appropriate date
     changes.

          (s)  If a Registered Exchange Offer or a Private Exchange is to be
     consummated, upon delivery of the Initial Securities by Holders to the
     Issuer (or to such other Person as directed by the Issuer) in exchange for
     the Exchange Securities or the Private Exchange Securities, as the case may
     be, the Issuer shall mark, or cause to be marked, on the Initial Securities
     so exchanged that such Initial Securities are being canceled in exchange
     for the Exchange Securities or the Private Exchange Securities, as the case
     may be; in no event shall the Initial Securities be marked as paid or
     otherwise satisfied.

          (t)  The Issuer will use its best efforts to (a) if the Initial
     Securities have been rated prior to the initial sale of such Initial
     Securities, confirm such ratings will apply to the Securities covered by a
     Registration Statement, or (b) if the Initial Securities were not
     previously rated, cause the Securities covered by a Registration Statement
     to be rated with the appropriate rating agencies, if so requested by
     Holders of a majority in aggregate principal amount of Securities covered
     by such Registration Statement, or by the managing underwriters, if any.

          (u)  In the event that any broker-dealer registered under the Exchange
     Act shall underwrite any Securities or participate as a member of an
     underwriting syndicate or selling group or "assist in the distribution"
     (within the meaning of the Conduct Rules (the "Rules") of the National
     Association of Securities Dealers, Inc. ("NASD")) thereof, whether as a
     Holder of such Securities or as an underwriter, a placement or sales agent
     or a broker or dealer in respect thereof, or otherwise, the Company will
     assist such broker-dealer in complying with the requirements of such
     Rules, including, without limitation, by (i) if such Rules, including Rule
     2720, shall so require, engaging a "qualified independent underwriter" (as
     defined in Rule 2720) to participate in the preparation of the Registration
     Statement relating to such Securities, to exercise usual standards of due
     diligence in respect thereto and, if any portion of the offering
     contemplated by such Registration Statement is an underwritten offering or
     is made through a placement or sales agent, to recommend the yield of such
     Securities, (ii) indemnifying any such qualified independent underwriter to
     the extent of the indemnification of underwriters provided in Section 5
     hereof and (iii) providing such information to such broker-dealer as may be
     required in order for such broker-dealer to comply with the requirements
     of the Rules.

          (v)  The Company shall use its best efforts to take all other steps
     necessary to effect the registration of the Securities covered by a
     Registration Statement contemplated hereby.

     4.  Registration Expenses.  (a) All expenses incident to the Company's
performance of and compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement is ever filed or becomes
effective, including without limitation;

          (i)   all registration and filing fees and expenses;

          (ii)  all fees and expenses of compliance with federal securities and
     state "blue sky" or securities laws;

          (iii) all expenses of printing (including printing certificates for
     the Securities to be issued in the Registered Exchange Offer and the
     Private Exchange and printing of Prospectuses), messenger and delivery
     services and telephone;

                                       8
<PAGE>

          (iv)  all fees and disbursements of counsel for the Company, and all
     reasonable fees and expenses, if any, of Cravath, Swaine & Moore, counsel
     for the Initial Purchasers, incurred in connection with the Registered
     Exchange Offer;

          (v)   all application and filing fees in connection with listing the
     Exchange Securities on a national securities exchange or automated
     quotation system pursuant to the requirements hereof; and

          (vi)  all fees and disbursements of independent certified public
     accountants of the Company (including the expenses of any special audit and
     comfort letters required by or incident to such performance).

The Company will bear its internal expenses (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), the expenses of any annual audit and the fees and expenses
of any person, including special experts, retained by the Company.

     (b)  In connection with any Registration Statement required by this
Agreement, the Company will reimburse the Initial Purchasers and the Holders of
Transfer Restricted Securities who are tendering Initial Securities in the
Registered Exchange Offer and/or selling or reselling Securities pursuant to the
"Plan of Distribution" contained in the Exchange Offer Registration Statement or
the Shelf Registration Statement, as applicable, for the reasonable fees and
disbursements of not more than one counsel, who shall be Cravath, Swaine & Moore
unless another firm shall be chosen by the Holders of a majority in principal
amount of the Transfer Restricted Securities for whose benefit such Registration
Statement is being prepared.

     5.   Indemnification.  (a)  The Company agrees to indemnify and hold
harmless each Holder of the Securities, any Participating Broker-Dealer and
each person, if any, who controls such Holder or such Participating Broker-
Dealer within the meaning of the Securities Act or the Exchange Act (each
Holder, any Participating Broker-Dealer and such controlling persons are
referred to collectively as the "Indemnified Parties") from and against any
losses, claims, damages or liabilities, joint or several, or any actions in
respect thereof (including, but not limited to, any losses, claims, damages,
liabilities or actions relating to purchases and sales of the Securities) to
which each Indemnified Party may become subject under the Securities Act, the
Exchange Act or otherwise, insofar as such losses, claims, damages, liabilities
or actions arise out of or are based upon (i) any untrue statement or alleged
untrue statement of a material fact contained in a Registration Statement or
prospectus or in any amendment or supplement thereto or in any preliminary
prospectus relating to a Shelf Registration, or (ii) the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and shall reimburse, as
incurred, the Indemnified Parties for any legal or other expenses reasonably
incurred by them in connection with investigating or defending any such loss,
claim, damage, liability or action in respect thereof; provided, however, that
                                                       --------  -------
(i) the Company shall not be liable in any such case to the extent that such
loss, claim, damage or liability arises out of or is based upon any untrue
statement or alleged untrue statement or omission or alleged omission made in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration in reliance
upon and in conformity with written information pertaining to such Holder and
furnished to the Company by or on behalf of such Holder specifically for
inclusion therein and (ii) with respect to any untrue statement or omission or
alleged untrue statement or omission made in any preliminary prospectus relating
to a Shelf Registration Statement, the indemnity agreement contained in this
subsection (a) shall not inure to the benefit of any Holder or Participating
Broker-Dealer from whom the person asserting any such losses, claims, damages or
liabilities purchased the Securities concerned, to the extent that a prospectus
relating to such Securities was required to be delivered by such Holder or
Participating Broker-Dealer under the Securities Act in connection with such
purchase and any such loss, claim, damage or liability of such Holder or
Participating Broker-Dealer results from the fact that there was not sent or
given to such person, at or prior to the written confirmation of the sale of
such Securities to such person, a copy of the final prospectus if the Company
had previously furnished copies thereof to such Holder or Participating Broker-
Dealer; provided further, however, that this indemnity agreement will be in
        -------- -------  -------
addition to any liability which the Company may otherwise have to such
Indemnified Party. The Company shall also indemnify underwriters, their officers
and directors and each person who controls such underwriters within the meaning
of the Securities Act or the Exchange Act to the same extent as provided above
with respect to the indemnification of the Holders of the Securities if
requested by such Holders.

     (b)  Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Company and each person, if any, who controls
the Company within the meaning of the Securities Act or the Exchange Act from
and against any losses, claims, damages or liabilities or any actions in

                                       9
<PAGE>

respect thereof, to which the Company or any such controlling person may become
subject under the Securities Act, the Exchange Act or otherwise, insofar as such
losses, claims, damages, liabilities or actions arise out of or are based upon
(i) any untrue statement or alleged untrue statement of a material fact
contained in a Registration Statement or prospectus or in any amendment or
supplement thereto or in any preliminary prospectus relating to a Shelf
Registration, or (ii) the omission or alleged omission to state therein a
material fact necessary to make the statements therein not misleading, but in
each case only to the extent that the untrue statement or omission or alleged
untrue statement or omission was made in reliance upon and in conformity with
written information pertaining to such Holder and furnished to the Company by or
on behalf of such Holder specifically for inclusion therein; and, subject to the
limitation set forth immediately preceding this clause, shall reimburse, as
incurred, the Company for any legal or other expenses reasonably incurred by the
Company or any such controlling person in connection with investigating or
defending any loss, claim, damage, liability or action in respect thereof. This
indemnity agreement will be in addition to any liability which such Holder may
otherwise have to the Company or any of its controlling persons.

     (c)  Promptly after receipt by an indemnified party under this Section 5
of notice of the commencement of any action or proceeding (including a
governmental investigation), such indemnified party will, if a claim in respect
thereof is to be made against the indemnifying party under this Section 5,
notify the indemnifying party of the commencement thereof; but the omission so
to notify the indemnifying party will not, in any event, relieve the
indemnifying party from any obligations to any indemnified party other than the
indemnification obligation provided in paragraph (a) or (b) above. In case any
such action is brought against any indemnified party, and it notifies the
indemnifying party of the commencement there of, the indemnifying party will be
entitled to participate therein and, to the extent that it may wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel reasonably satisfactory to such indemnified party (who
shall not, except with the consent of the indemnified party, be counsel to t he
indemnifying party), and after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof the
indemnifying party will not be liable to such indemnified party under this
Section 5 for any legal or other expenses, other than reasonable costs of
investigation, subsequently incurred by such indemnified party in connection
with the defense thereof. No indemnifying party shall, without the prior written
consent of the indemnified party, effect any settlement of any pending or
threatened action in respect of which any indemnified party is or could have
been a party and indemnity could have been sought hereunder by such indemnified
party unless such settlement includes an unconditional release of such
indemnified party from all liability on any claims that are the subject matter
of such action, and does not include a statement as to or an admission of fault,
culpability or a failure to act by or on behalf of any indemnified party.

     (d)  If the indemnification provided for in this Section 5 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to in subsection (a) or (b)
above in such proportion as is appropriate to reflect the relative fault of the
indemnifying party or parties on the one hand and the indemnified party on the
other in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities (or actions in respect thereof) as well
as any other relevant equitable considerations. The relative fault of the
parties shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
on the one hand or such Holder or such other indemnified party, as the case may
be, on the other, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The amount paid by an indemnified party as a result of the losses, claims,
damages or liabilities referred to in the first sentence of this subsection (d)
shall be deemed to include any legal or other expenses reasonably incurred by
such indemnified party in connection with investigating or defending any action
or claim which is the subject of this subsection (d). Notwithstanding any other
provision of this Section 5(d), the Holders of the Securities shall not be
required to contribute any amount in excess of the amount by which the net
proceeds received by such Holders from the sale of the Securities pursuant to a
Registration Statement exceeds the amount of dam ages which such Holders have
otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. For purposes of this paragraph (d), each person,
if any, who controls such indemnified party within the meaning of the Securities
Act or the Exchange Act shall have the same rights to contribution as such
indemnified party and each person, if any, who controls the Company within the
meaning of the Securities Act or the Exchange Act shall have the same rights to
contribution as the Company.

                                       10
<PAGE>

     (e)  The agreements contained in this Section 5 shall survive the sale of
the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

     6.   Additional Interest Under Certain Circumstances.  (a)  Additional
interest (the "Additional Interest") with respect to the Securities shall be
assessed as follows if any of the following events occur (each such event in
clauses (i) through (iv) below a "Registration Default"):

     (i)    any Registration Statement required by this Agreement is not filed
            with the Commission on or prior to the applicable Filing Deadline;

     (ii)   any Registration Statement required by this Agreement is not
            declared effective by the Commission on or prior to the applicable
            Effectiveness Deadline;

     (iii)  the Registered Exchange Offer has not been consummated on or prior
            to the Consummation Deadline; or

     (iv)   any Registration Statement required by this Agreement has been
            declared effective by the Commission but (A) such Registration
            Statement thereafter ceases to be effective or (B) such Registration
            Statement or the related prospectus ceases to be usable in
            connection with resales of Transfer Restricted Securities during the
            periods specified herein because either (1) any event occurs as a
            result of which the related prospectus forming part of such
            Registration Statement would include any untrue statement of a
            material fact or omit to state any material fact necessary to make
            the statements therein in the light of the circumstances under which
            they were made not misleading, or (2) it shall be necessary to amend
            such Registration Statement or supplement the related prospectus, to
            comply with the Securities Act or the Exchange Act or the respective
            rules thereunder.

Each of the foregoing will constitute a Registration Default whatever the
reason for any such event and whether it is voluntary or involuntary or is
beyond the control of the Company or pursuant to operation of law or as a result
of any action or inaction by the Commission.

     Additional Interest shall accrue on the Initial Securities and the Private
Exchange Securities over and above the interest set forth in the title of the
Securities from and including the date on which any such Registration Default
shall occur to but excluding the date on which all such Registration Defaults
have been cured, at a rate of 0.50% per annum (the "Additional Interest Rate")
for the first 90-day period immediately following the occurrence of such
Registration Default.  The Additional Interest Rate shall increase by an
additional 0.50% per annum with respect to each subsequent 90-day period until
all Registration Defaults have been cured, up to a maximum Additional Interest
Rate of 1.0% per annum.

     (b)  A Registration Default referred to in Section 6(a)(iv) hereof shall be
deem ed not to have occurred and be continuing in relation to a Shelf
Registration Statement or the related prospectus if (i) such Registration
Default has occurred solely as a result of (x) the filing of a post-effective
amendment to such Shelf Registration Statement to incorporate annual audited
financial information with respect to the Company where such post-effective
amendment is not yet effective and needs to be declared effective to permit
Holders to use the related prospectus or (y) other material events, with respect
to the Company that would need to be described in such Shelf Registration
Statement or the related prospectus and (ii) in the case of clause (y), the
Company is proceeding promptly and in good faith to amend or supplement such
Shelf Registration Statement and related prospectus to describe such events;
provided, however, that in any case if such Registration Default   occurs for a
--------  -------
continuous period in excess of 30 days, Additional Interest shall be payable in
accordance with the above paragraph from the day such Registration Default
occurs until the date on which such Registration Default is cured.

     (c)  Any amounts of Additional Interest due pursuant to Section 6(a) will
be payable in cash on the regular interest payment dates with respect to the
Securities. The amount of Additional Interest will be determined by multiplying
the applicable Additional Interest Rate by the principal amount of the Initial
Securities or Private Exchange Securities, as the case may be, and further
multiplied by a fraction, the numerator of which is the number of days such
Additional Interest Rate was applicable during such period (determined on the
basis of a 360-day year comprised of twelve 30-day months), and the denominator
of which is 360.

     (d)  "Transfer Restricted Securities" means each Security until (i) the
date on which such Security has been exchanged by a person other than a broker-
dealer for a freely transferable Exchange

                                       11
<PAGE>

Security in the Registered Exchange Offer, (ii) following the exchange by a
broker-dealer in the Registered Exchange Offer of an Initial Security for an
Exchange Security, the date on which such Exchange Security is sold to a
purchaser who receives from such broker-dealer on or prior to the date of such
sale a copy of the prospectus contained in the Exchange Offer Registration
Statement, (iii) the date on which such Security has been effectively registered
under the Securities Act and disposed of in accordance with the Shelf
Registration Statement or (iv) the date on which such Security is distributed to
the public pursuant to Rule 144 under the Securities Act or is saleable pursuant
to Rule 144(k) under the Securities Act.

     7.   Rules 144 and 144A. The Company shall use its best efforts to file the
reports required to be filed by it under the Securities Act and the Exchange Act
in a timely manner and, if at any tim e the Company is not required to file such
reports, it will, upon the request of any Holder of Transfer Restricted
Securities, make publicly a vailable other information so long as necessary to
permit sale s of their securities pursuant to Rules 144 and 144A. The Company
covenants that it will take such further action as any Holder of Transfer
Restricted Securities may reasonably request, all to the extent required from
time to time to enable such Holder to sell Transfer Restricted Securities
without registration under the Securities Act within the limitation of the
exemptions provided by Rules 144 and 144A (including the requirements of Rule
144A(d)(4)). The Issuer will provide a copy of this Agreement to prospective
purchasers of Initial Securities identified to the Issuer by the Initial
Purchasers upon request. Upon the request of any Holder of Initial Securities,
the Issuer shall deliver to such Holder a written statement as to whether it has
complied with such requirements. Notwithstanding the foregoing, nothing in this
Section 7 shall be deemed to require the Company to register any of its
securities pursuant to the Exchange Act.

     8.   Underwritten Registrations.  If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
the Holders of a majority in aggregate principal a mount of such Transfer
Restricted Securities to be included in such offering.

     No person may participate in any underwritten registration hereunder unless
such person (i) agrees to sell such person's Transfer Restricted Securities on
the basis reasonably provided in any underwriting arrangements approved by the
persons entitled hereunder to approve such arrangements and (ii) completes and
executes all questionnaires, powers of attorney, indemnities, underwriting
agreements and other documents reasonably required under t he terms of such
underwriting arrangements.

     9.   Miscellaneous.

     (a)  Remedies.  The Company acknowledges and agrees that any failure by the
Company to comply with its obligations under Section 1 and 2 hereof may result
in material irreparable injury to the Initial Purchasers or the Holders for
which there is no adequate remedy at law, that it will not be possible to
measure damages for such injuries precisely and that, in the event of any such
failure, the Initial Purchasers or any Holder may obtain such relief as may be
required to specifically enforce the Company's obligations under Sections 1 and
2 hereof. The Company further agree s to waive the defense in any action for
specific performance that a remedy at law would be adequate.

     (b)  No Inconsistent Agreements.  The Company will not on or after the date
of this Agreement enter into any agreement with respect to its securit ies that
is inconsistent with the rights granted to the Holders in this Agreement or
otherwise conflicts with the provisions hereof.  The rights granted to the
Holders hereunder do not in any way conflict with and are not inconsistent with
the rights granted to the holders of the Company's securities under any
agreement in effect on the date hereof.

     (c)  Amendments and Waivers.  The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Company and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents.

     (d)  Notices.  All notices and other communications provided for or permit
ted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

          (1)  if to a Holder of the Securities, at the most current address
given by such Holder to the Issuer;

                                       12
<PAGE>

          (2)  if to the Initial Purchasers,

                    Credit Suisse First Boston Corporation
                    Eleven Madison Avenue
                    New York, NY 10010-3629
                    Fax No.: (212) 325-8278
                    Attention: Transactions Advisory Group

     with a copy to:

                    Cravath, Swaine & Moore
                    Worldwide Plaza
                    825 Eighth Avenue
                    New York, New York 10019-7475
                    Fax No.: (212) 474-3700
                    Attention: Kris F. Heinzelman, Esq.


          (3)       if to the Company or any Guarantor,:

                    Morrison Knudsen Corporation
                    Morrison Knudsen Plaza
                    720 Park Boulevard
                    Boise, Idaho 83712
                    Fax No.: (208) 386-6220
                    Attention: General Counsel


     with a copy to:

                    Jones, Day, Reavis & Pogue
                    77 West Wacker
                    Chicago, Illinois 60601-1692
                    Fax No.: (312) 782-8585
                    Attention: Robert A. Yolles, Esq.

     All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

     (e)  Third Party Beneficiaries.  The Holders shall be third party
beneficiaries to the agreements made hereunder between the Company, on the one
hand, and the Initial Purchasers, on the other hand, and shall have the right to
enforce such agreements directly to the extent they may deem such enforcement
necessary or advisable to protect their rights or the rights of Holders
hereunder.

     (f)  Agreements of the Guarantors.  All agreements of a Guarantor shall be
effective following the date it becomes a party hereto.  Notwithstanding this
section, this Agreement will be binding as between the Company and the Initial
Purchasers as of and following the date hereof.

     (g)  Successors and Assigns.  This Agreement shall be binding upon the
successors and assigns of each of the parties.

     (h)  Counterparts.  This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

     (i)  Headings.  The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

     (j)  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

                                       13
<PAGE>

     (k)  Severability.  If any one or more of the provisions contained herein,
or the application thereof in any circumstance, is held invalid, illegal or
unenforceable, the validity, legality and enforceability of any such provision
in every other respect and of the remaining provisions contained herein shall
not be affected or impaired thereby.

     (l)  Securities Held by the Company.  Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities is required
hereunder, Securities held by the Company or its affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

                                       14
<PAGE>

     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Issuer a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement among
the several Initial Purchasers, the Issuer and the Guarantors in accordance with
its terms.

                                   Very truly yours,

                                   MORRISON KNUDSEN CORPORATION

                                        by  /s/ Jonathan M. Robertson
                                          --------------------------------
                                             Name:  Jonathan M. Robertson
                                             Title: Assistant Secretary

                                   THE GUARANTORS LISTED ON SCHEDULE A
                                   HERETO

                                        by   /s/ Jonathan M. Robertson
                                          -------------------------------
                                              Name:  Jonathan M. Robertson
                                              Title: Assistant Secretary

                                       15
<PAGE>

The foregoing Registration
Rights Agreement is hereby confirmed
and accepted as of the date first
above written.

Credit Suisse First Boston Corporation
BMO Nesbitt Burns Corp.
U.S. Bancorp Libra, a Division of
  U.S. Bancorp Investments, Inc.,

     By:  Credit Suisse First Boston Corporation

     by /s/ Pedro Garcia
       -----------------------------------------
       Name: Pedro Garcia
       Title: Attorney-in-Fact

                                       16
<PAGE>

                                  SCHEDULE A*


                                                             Place of
Guarantor                                                   Formation
---------                                                   ---------
Centennial Engineering, Inc.                                Colorado

Morrison Knudsen Corporation                                  Ohio

Morrison Knudsen Corporation (Montana)                      Montana

Morrison Knudsen International, Inc.                         Nevada

Morrison Knudsen Leasing Corporation                         Nevada

Morrison Knudsen LLC                                         Nevada

National Projects, Inc.                                      Nevada

Pomeroy Corporation                                         California

Washington Contractors Group, Inc.                           Montana


  ________________

     * The following subsidiaries of RECI will become Guarantors under this
       Agreement on the Closing Date upon the execution of an amendment hereto:

Asia Badger, Inc.                                            Delaware

Badger Energy, Inc.                                          Delaware

Energy Overseas International, Inc.                          Delaware

Raytheon-Catalytic, Inc.                                     Delaware

Raytheon Constructors, Inc.                                  Delaware

Raytheon Constructors International, Inc.                    Delaware

Raytheon Demilitarization Company                            Delaware

Raytheon-Ebasco Overseas Ltd.                                Delaware

Raytheon Engineers & Constructors, Inc.                      Delaware

Raytheon Engineers & Constructors, Midwest, Inc.             Delaware

Raytheon Engineers & Constructors UK Ltd.                    Delaware

Rust Constructors, Inc.                                      Delaware

United Engineers Far East, Ltd.                              Delaware

United Engineers International, Inc.                       Pennsylvania

United Mid-East, Inc.                                        Delaware
<PAGE>

                                                                         ANNEX A

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. The Letter
of Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of Exchange Securities received in exchange for Initial Securities
where such Initial Securities were acquire d by such broker-dealer as a result
of market-making activities or other trading activities. The Company has agreed
that, for a period of 180 days after the Expiration Date (as defined herein), it
will make this Prospectus available to any broker-dealer for use in connection
with any such resale. See "Plan of Distribution."

                                       1
<PAGE>

                                                                         ANNEX B


     Each broker-dealer that receives Exchange Securities for its own account in
exchange for Initial Securities, where such Initial Securities were acquired by
such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Securities. See "Plan of Distribution."

                                       1
<PAGE>

                                                                         ANNEX C


                             PLAN OF DISTRIBUTION

     Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securit ies were acquired as
a result of market-making activities or other tra ding activities. The Company
has agreed that, for a period of 180 days after the Expiration Date, it will
make this prospectus, as amended or supplemented, available to any broker-dealer
for use in connection with any such resale. In addition, until       , 2000, all
dealers effecting transactions in the Exchange Securities may be required to
deliver a prospectus./(1)/

     The Company will not receive any proceeds from any sale of Exchange
Securities by broker-dealers. Exchange Securities receive d by broker-dealers
for their own account pursuant to the Exchange Offer may be sold from time to
time in one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the Exchange Securities or a
combination of such methods of resale, at market prices prevailing at the time
of resale, at prices related to such prevailing market prices or negotiated
prices. Any such resale may be made directly to purchasers or to or through
brokers or dealers who may receive compensation in the form of commissions or
concessions from any such broker-dealer or the purchasers of any such Exchange
Securities. Any broker-dealer that resells Exchange Securit ies that were
received by it for its own account pursuant to the Exchange Offer and any broker
or dealer that participates in a distribution of such Exchange Securities may
be deemed to be an "underwriter" within the meaning of the Securities Act and
any profit on any such resale of Exchange Securities and any commission or
concessions received by any such persons may be deemed to be underwriting
compensation under the Securities Act. The Letter of Transmittal states that,
by acknowledging that it will deliver and by delivering a prospectus, a broker-
dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

     For a period of 180 days after the Expiration Date the Company will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. The Company has agreed to pay all expenses
incident to the Exchange Offer (including the expenses of one counsel for the
Holders of the Securities) other than commissions or concessions of any brokers
or dealers and will indemnify the Holders of the Securities (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.


  __________________

/(1)/  In addition, the legend required by Item 502(e) of Regulation S-K will
appear on the back cover page of the Exchange Offer prospectus.

                                       1
<PAGE>

                                                                         ANNEX D


[_]  CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10
ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR
SUPPLEMENTS THERETO.

          Name:_____________________________________
          Address:__________________________________

If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Securities.  If the undersigned is a broker-dealer that will receive Exchange
Securities for its own account in exchange for Initial Securities that were
acquired as a result of market-making activities or other trading activities, it
acknowledges that it will deliver a prospectus in connection with any resale
of such Exchange Securities; however, by so acknowledging and by delivering a
prospectus, the undersigned will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.

                                       1
<PAGE>

                    AMENDMENT NO. 1 dated as of July 7, 2000, to the
               Registration Rights Agreement dated as of June 28, 2000, among
               Morrison Knudson Corporation, a Delaware corporation (the
               "Company"), each of the subsidiaries listed on Schedule A thereto
               (each such subsidiary individually, a "Guarantor" and
               collectively, the "Guarantors"), and Credit Suisse First Boston
               Corporation, BMO Nesbitt Burns Corp., and U.S. Bancorp Libra, a
               division of U.S. Bancorp Investments, Inc. (the "Purchasers").

     A.  Capitalized terms used herein and not otherwise defined herein shall
have the meanings assigned to such terms in the Registration Rights Agreement.

     B. The Guarantors have entered into the Registration Rights Agreement in
order to induce the Purchasers to purchase the Notes. Pursuant to Section 6(k)
of the Purchase Agreement dated as of June 28, 2000, among the Company, the
Guarantors and the Purchasers, as amended, each subsidiary of the Company as of
the Closing Date listed in the footnote to Schedule A to the Registration Rights
Agreement is required to become a party to the Registration Rights Agreement as
a Guarantor by execution and delivery of an instrument in the form of this
Amendment. The undersigned subsidiaries of the Company (the "New Guarantors")
are executing this Amendment in accordance with the requirements of the Purchase
Agreement to become a party to the Registration Rights Agreement.

     Accordingly, the Company, the New Guarantors and the Purchasers agree as
follows:

     SECTION 1. Each New Guarantor by its signature below becomes a party to the
Registration Rights Agreement with the same force and effect as if originally
named therein as a Guarantor, and each New Guarantor hereby agrees to all the
terms and provisions of the Registration Rights Agreement applicable to it as a
Guarantor thereunder. Each reference to a "Guarantor" in the Registration Rights
Agreement shall be deemed to include each New Guarantor. The Registration Rights
Agreement is hereby incorporated herein by reference.

     SECTION 2. Each New Guarantor represents and warrants to the Purchasers
that this Amendment has been duly authorized, executed and delivered by it and
constitutes its legal, valid and binding obligation, enforceable against it in
accordance with its terms.

     SECTION 3. This Amendment may be executed in counterparts, each of which
shall constitute an original, but all of which when taken together shall
constitute a single contract. Delivery of an executed signature page to this
Amendment by facsimile transmission shall be as effective as delivery of a
manually executed counterpart of this Amendment.

     SECTION 4. Except as expressly amended hereby, the Registration Rights
Agreement shall remain in full force and effect.

     SECTION 5. THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE
WITH, THE LAWS OF THE STATE OF NEW YORK.

     SECTION 6. In case any one or more of the provisions contained in this
Amendment should be held invalid, illegal or unenforceable in any respect, the
validity, legality and enforceability of the remaining provisions contained
herein and in the Registration Rights Agreement shall not in any way be affected
or impaired thereby (it being understood that the
<PAGE>

                                                                              2


invalidity of a particular provision hereof in a particular jurisdiction shall
not in and of itself affect the validity of such provision in any other
jurisdiction). The parties hereto shall endeavor in good-faith negotiations to
replace the invalid, illegal or unenforceable provisions with valid provisions
the economic effect of which comes as close as possible to that of the invalid,
illegal or unenforceable provisions.

     SECTION 7.  All communications and notices hereunder shall be in writing
and given as provided in Section 9(d) of the Registration Rights Agreement.  All
communications and notices hereunder to any New Guarantor shall be given to it
at the address set forth in Section 9(d) of the Registration Rights Agreement.


     IN WITNESS WHEREOF, the Company, the New Guarantors and the Purchasers have
duly executed this Amendment to the Registration Rights Agreement as of the day
and year first above written.


                              MORRISON KNUDSEN CORPORATION,



                              by /s/ Jonathan M. Robertson
                                 _____________________________________________
                                 Name: Jonathan M. Robertson
                                 Title: Assistant Secretary


                              THE SUBSIDIARY GUARANTORS LISTED ON SCHEDULE 1
                              HERETO,



                              by /s/ Jonathan M. Robertson
                                 _____________________________________________
                                 Name: Jonathan M. Robertson
                                 Title: Assistant Secretary


                              CREDIT SUISSE FIRST BOSTON CORPORATION, BMO
                              NESBITT BURNS CORP., U.S. BANCORP LIBRA, a
                              division of U.S. Bancorp Investments, Inc., acting
                              on behalf of themselves and as the Representatives
                              of the several Purchasers,

                              By  Credit Suisse First Boston Corporation


                              by /s/ Pedro Garcia
                                 _______________________________________________
                                 Name: Pedro Garcia
                                 Title: Attorney-in-Fact
<PAGE>

                                                                              3

                              SCHEDULE 1



                                                             Place of
Guarantor                                                    Formation
---------                                                    ---------

Asia Badger, Inc.                                             Delaware

Badger Energy, Inc.                                           Delaware

Energy Overseas International, Inc.                           Delaware

Raytheon-Catalytic, Inc.                                      Delaware

Raytheon Constructors, Inc.                                   Delaware

Raytheon Constructors International, Inc.                     Delaware

Raytheon Demilitarization Company                             Delaware

Raytheon-Ebasco Overseas Ltd.                                 Delaware

Raytheon Engineers & Constructors, Inc.                       Delaware

Raytheon Engineers & Constructors, Midwest, Inc.              Delaware

Raytheon Engineers & Constructors UK Ltd.                     Delaware

Rust Constructors, Inc.                                       Delaware

United Engineers Far East, Ltd.                               Delaware

United Engineers International, Inc.                        Pennsylvania

United Mid-East, Inc.                                         Delaware