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                 [Letterhead of Wachtell, Lipton, Rosen & Katz]



                                                        Exhibit 5.1


                                October 7, 1996



Royal Oak Mines Inc.
5501 Lakeview Drive
Kirkland, Washington  98033


Ladies and Gentlemen:

   
     We have acted as special United States counsel for Royal Oak Mines Inc., an
Ontario, Canada corporation (the "Company"), in connection with the preparation
of the Company's Registration Statement on Form S-4, registration number
333-11117, as amended, (the "Registration Statement") under the Securities Act
of 1933, as amended (the "Securities Act"), filed with the Securities and
Exchange Commission on August 30, 1996, relating to an offer to exchange (the
"Exchange Offer") the Series B 11% Senior Subordinated Notes Due 2006 of the
Company (the "Exchange Notes") for an equal principal amount of the Company's
outstanding 11% Senior Subordinated Notes due 2006 (the "Notes").  The Exchange
Notes will be guaranteed on a senior subordinated basis (the "Guarantee") by
Kemess Mines Inc. (the "Guarantor"), an Ontario, Canada corporation that is a
wholly owned subsidiary of the Company.
    

     The Notes were issued, and the Exchange Notes will be issued, under an
Indenture dated as of August 12, 1996 (the "Indenture"), among the Company, the
Guarantor and Mellon Bank, F.S.B., as Trustee (the "Trustee").

     As special United States counsel, we have examined the Registration
Statement, the Indenture (included as Exhibit 4.1 to the Registration
Statement), the form of the Exchange Notes (set forth as Exhibit B to the
Indenture) and such other


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documents, records and other matters as we have deemed necessary or appropriate
in order to give the opinions set forth herein.

     We have, with your approval, assumed the legal capacity of all natural
persons, the genuineness of all signatures, the authenticity of all documents
submitted to us as originals, the conformity to original documents of documents
submitted to us as certified, facsimile, conformed, electronic or photostatic
copies and the authenticity of the originals of such copies.  As to all
questions of fact material to this opinion that have not been independently
established, we have relied upon certificates or comparable documents, and oral
and written statements and representations, of officers and representatives of
the Company and the Guarantor.  We have not independently verified such
information and assumptions.

     We have further, with your approval, assumed (without any independent
investigation or verification of any kind) and have relied upon the opinion of
Lang Michener, Canadian counsel for the Company, delivered to you today, as to
(among other matters set forth therein): the due incorporation, valid existence
and good standing of each of the Company and the Guarantor in its respective
jurisdiction of incorporation; the possession by each of the Company and the
Guarantor of the requisite corporate power and authority to execute, deliver
and perform its respective obligations under the Exchange Notes, the Guarantee,
and the Indenture; the due and valid authorization, due execution and delivery
of the Indenture by each of the Company and the Guarantor; and the due and
valid authorization of the Exchange Notes and the Guarantee by the Company and
the Guarantor, respectively.

     Based upon and subject to the foregoing, assuming that the Indenture has
been duly authorized, executed and delivered by, and represents the valid and
binding obligation of, the Trustee, and when the Registration Statement,
including any amendment thereto, shall have become effective under the
Securities Act and the Indenture shall have been duly qualified under the Trust
Indenture Act of 1939, as amended, it is our opinion that:

      A. the Indenture constitutes the legal, valid and binding obligation of
         each of the Company and the Guarantor, enforceable against each of the
         Company and the Guarantor in accordance with its terms;


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     B. the Exchange Notes, when duly executed and delivered by or on behalf of
        the Company in the form contemplated by the Indenture upon the terms set
        forth in the Exchange Offer and authenticated by the Trustee or the
        Authenticating Agent (as defined in the Indenture) in accordance with
        the terms of the Indenture, will constitute the legal, valid and binding
        obligations of the Company, enforceable against the Company in
        accordance with their terms; and

     C. the Guarantee, when duly executed and delivered by or on behalf of the
        Guarantor upon the terms set forth in the Exchange Offer, will
        constitute the legal, valid and binding obligation of the Guarantor,
        enforceable against the Guarantor in accordance with its terms;

subject, in each case, to (a) bankruptcy, insolvency, moratorium, reorganization
and other laws of general applicability relating to or affecting creditors'
rights from time to time in effect; (b) application of general principles of
equity (regardless of whether considered in proceedings in equity or at law) and
the discretion of the court before which any proceeding therefor may be brought;
(c) standards of commercial reasonableness and the implied covenant of good
faith; and (d) public policy.

     In addition, the opinions expressed herein are subject to the following
assumptions, exceptions, limitations, qualifications and comments:

      1.   We express no opinion as to whether a federal or state court
           outside New York would give effect to the choice of New York law
           provided for in the Indenture.

      2.   We express no opinion as to the effect of the laws of any
           jurisdiction (other than federal laws of the United States and the
           laws of the State of New York) wherein any holder of the Exchange
           Notes may be located which limit rates of interest that may be
           charged or collected by such holder.

      3.   We express no opinion with respect to the lawfulness or
           enforceability of:

           (i) provisions relating to delay or omission of enforcement of rights
               or remedies, waivers of defenses, or waivers of benefits of any
               usury, appraisement, valuation, stay, extension, moratorium,
               redemption, statutes of limitation or other non-waivable benefits
               bestowed by operation of law;


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     (ii) exculpation provisions, provisions relating to releases of unmatured
          claims, provisions purporting to waive immaterial rights, severability
          provisions and provisions similar in substance and nature to those
          described in the foregoing clause (i) and this clause (ii), insofar as
          any of the foregoing are contained in the Indenture; and 

    
    (iii) indemnification or contribution provisions to the extent they purport
          to relate to liabilities from or based upon negligence or any
          violation of, or relate to rights of contribution or indemnification
          that are violative of, any law, rule or regulation or the public
          policy underlying any law, rule or regulation (including any federal,
          state or foreign securities law, rule or regulation).

     4. Certain of the remedial provisions and waivers with respect to the
        Guarantee contained in the Indenture may be unenforceable in whole or in
        part, but the inclusion of such provisions does not affect the validity
        of the Guarantee, taken as a whole, and the Guarantee, taken as a whole,
        together with the laws of the State of New York, contains adequate
        provision for the practical realization of the benefits of the guarantee
        created thereby.

     5. Notwithstanding anything to the contrary in this opinion, we express no
        opinion as to the enforceability against the Company or the Guarantor of
        the Indenture, the Exchange Notes or the Guarantee to the extent the
        foregoing may fail to be enforceable due to the fact that the Company
        and the Guarantor are not organized under the laws of the United States
        or of any State thereof, although as of the date of this opinion we are
        not aware of any limitation on enforceability arising from such fact.

     6. We express no opinion as to the effect on the Indenture, the Exchange
        Notes or the Guarantee, or on the opinions expressed herein, of any
        fraudulent conveyance laws.

     We are not members of the Bar of any jurisdiction other than the State of
New York.  The opinions herein are limited to the laws of the State of New York
and the federal laws of the United States, and we express no opinion as to the
effect on the matters covered by this opinion of the laws of any other
jurisdiction.  In addition, we express no opinion as to

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any laws, statutes, regulations or other requirements relating to mining or the
transfer of mineral rights under the laws of any jurisdiction.

     This opinion is rendered solely for your benefit in connection with the
Exchange Offer.  This opinion may not be used or relied upon by any other
person and may not be disclosed, quoted, filed with a government agency or
otherwise referred to without our prior written consent, except that we hereby
consent (i) to the use of this opinion as an Exhibit to the Registration
Statement and to the reference to our firm under the caption "Validity of
Exchange Notes" in the Prospectus that is a part of the Registration Statement
and (ii) to your filing copies of this opinion as an Exhibit to the
Registration Statement with agencies of such states as you deem necessary in
the course of complying with the laws of such states regarding the Exchange
Offer.  In giving any such consent, we do not hereby admit that we are in the
category of persons whose consent is required under Section 7 of the Securities
Act.

                                     Very truly yours,


                                     /s/ Wachtell, Lipton, Rosen & Katz