________  __, 1999


Riviera Black Hawk, Inc.
c/o Riviera Holdings Corporation
2901 Las Vegas Boulevard South
Las Vegas, Nevada  89109

      Re:  Riviera Black Hawk 13% First Mortgage Notes due 2005 With
           Contingent Interest
           ---------------------------------------------------------

Dear Sirs:

         We have acted as counsel  for  Riviera  Black  Hawk,  Inc.,  a Colorado
corporation  (the  "Registrant")  and  Riviera  Holdings  Corporation,  a Nevada
Corporation ("Riviera Holdings") in connection with the filing by the Registrant
of a Registration  Statement on Form S-4,  Registration No. 333-_____,  together
with the amendments thereto (the "Registration Statement"),  with the Securities
and Exchange  Commission  for the purpose of registering  $45 million  aggregate
principal  amount of the  Registrant's  13% First  Mortgage  Notes due 2005 With
Contingent  Interest  (the "New Notes")  under the  Securities  Act of 1933,  as
amended  (the  "Act").  The New Notes are to be issued in exchange  for an equal
aggregate  principal amount of the  Registrant's  outstanding 13% First Mortgage
Notes due 2005 With Contingent  Interest (the "Existing  Notes") pursuant to the
Registration  Rights  Agreement,  dated as of June 3, 1999,  by and  between the
Registrant and Jefferies & Company,  Inc.,  which has been filed as Exhibit 4.04
to the  Registration  Statement.  The New Notes are to be issued pursuant to the
terms of the indenture,  dated as of June 3, 1999, (the "Indenture") between the
Registrant and IBJ Whitehall Bank & Trust Company,  as trustee (the  "Trustee"),
which  has  been  filed  as  Exhibit  4.01 to the  Registration  Statement.  The
Indenture is to be qualified  under the Trust  Indenture Act of 1939, as amended
(the "TIA").

         In  connection  with the  foregoing,  we have  reviewed  such  records,
documents,  agreements and certificates,  and examined such questions of law, as
we have considered  necessary or appropriate for the purpose of this opinion. In
making our examination of records,  documents,  agreements and certificates,  we
have assumed the  authenticity  of the same, the  correctness of the information
contained  therein,  the  genuineness  of all  signatures,  the authority of all
persons entering and maintaining records or executing documents,  agreements and
certificates,  and the conformity to authentic  originals of all items submitted
to  us  as  copies  (whether  certified,  conformed,  photostatic  or  by  other
electronic  means)  of  records,  documents,   agreements  or  certificates.  In
rendering our opinion, we have relied as to factual matters upon certificates of
public  officials  and  certificates  and  representations  of  officers  of the
Registrant.




         We have assumed that the Indenture has been duly  authorized,  executed
and  delivered  by the  Trustee  and  constitutes  a legal,  valid  and  binding
agreement  of the Trustee.  In  addition,  we have assumed that there will be no
changes in  applicable  law  between  the date of this  opinion  and the date of
issuance and delivery of the New Notes.

         Based   upon  the   foregoing   and   having   regard  for  such  legal
considerations as we deem relevant, we are of the opinion that:

         The New Notes have been duly authorized by the Registrant. When (i) the
Registration Statement has been declared effective,  (ii) the Indenture has been
duly qualified under the TIA, (iii) the New Notes have been duly executed by the
Registrant,  (iv) the New Notes have been duly  authenticated  by the Trustee in
accordance  with the terms of the  Indenture,  and (v) the New  Notes  have been
issued and delivered in exchange for the Existing  Notes in accordance  with the
terms set forth in the prospectus included in the Registration  Statement,  then
upon the occurrence of all of the foregoing, the New Notes will be the valid and
binding obligations of the Registrant.

         This opinion is being  delivered to the  Registrant in connection  with
the  filing  of the  Registration  Statement  and for no other  purpose.  We are
members of the Bar of the State of New York, and we express no opinion as to the
laws of any  jurisdiction  other than the federal  laws of the United  States of
America and the laws of the State of New York.

         We hereby  consent to the filing of this opinion as Exhibit 5.01 to the
Registration  Statement  and to the use of our name  under  the  caption  "Legal
Matters" in the prospectus which is included in the Registration  Statement.  In
giving the foregoing  consent,  we do not admit that we come within the category
of persons  whose  consent is required  by the Act or the rules and  regulations
promulgated thereunder.

                                                  Very truly yours,


                                                  /s/ DECHERT PRICE & RHOADS