COLLATERAL ASSIGNMENT


     THIS COLLATERAL ASSIGNMENT (as amended,  supplemented or otherwise modified
from time to time, this "Assignment") is made as of June 3, 1999, by and between
RIVIERA BLACK HAWK, INC., a Colorado corporation,  (the "Company"),  in favor of
IBJ WHITEHALL BANK & TRUST COMPANY,  a New York banking  association,  having an
office at One State Street, 10th Floor, New York, New York 10004, as trustee (in
such capacity,  together with its successors and assigns, the "Trustee") for the
benefit of itself and the holders of the Notes (as defined below).


                                    Recitals

     A. Notes. Pursuant to that certain Indenture dated as of even date herewith
(as  amended,  supplemented  or  otherwise  modified  from  time  to  time,  the
"Indenture"),  by and between the Company  and the  Trustee,  the Company  shall
issue  its 13% First  Mortgage  Notes due 2005  With  Contingent  Interest  (the
"Original  Notes," and together with any notes issued in replacement  thereof or
exchange therefor,  the "Notes"),  in the original aggregate principal amount of
$45,000,000.  Capitalized terms used and not otherwise defined herein shall have
the meanings given in the Indenture.

     B.  Purpose.  In order to induce the holders of the Notes to enter into the
transactions  contemplated by the Indenture,  the parties have entered into this
Assignment  to evidence  the  Company's  collateral  assignment  for security of
certain  contracts  and  documents  related  to  the  design,  construction  and
operation of the Riviera Black Hawk.

                                    Agreement

     NOW,  THEREFORE,  in consideration of the foregoing  premises and for other
good and valuable consideration,  the receipt and sufficiency of which is hereby
acknowledged,  and in order to induce the holders of the Notes to  purchase  the
Notes, the Company agrees as follows:

     1. Assignment. As security for the due and punctual payment and performance
of all indebtedness  and obligations of the Company,  now or hereafter due under
the  Indenture,  the Notes,  the Collateral  Documents and all other  documents,
agreements and instruments (in each case, as amended,  supplemented or otherwise
modified  from  time  to  time)  now or  hereafter  executed  and  delivered  in
connection  with the  Indenture,  collectively,  the  "Transaction  Documents"),
whether or not arising after the  commencement of a proceeding  under Bankruptcy
Law (including  post-petition  interest) and whether or not recovery of any such
obligation  or  liability  may  be  barred  by  a  statute  of   limitations  or
prescriptive   period  or  such   obligation   or  liability  may  otherwise  be
unenforceable (collectively, the "Obligations"),  the Company hereby assigns and
transfers to the Trustee,  and hereby grants to the Trustee a security  interest
in, all of the Company's right, title and interest, to the extent assignable and
transferable, whether now existing or hereafter arising and whether now owned or
hereafter   acquired,   wherever  located,   in,  to  and  under  the  following
(collectively, the "Assigned Collateral"):


          (a) all contracts (including without limitation construction contracts
     and  architectural  design,   engineering  and  development  contracts  and
     agreements,  subcontracts,  service agreements, supply agreements and other
     such contracts and agreements)  between the Company and other persons,  and
     all amendments, modifications,  additions and changes thereto, in each case
     relating to the Riviera Black Hawk;

          (b)  all  plans,   specifications,   engineering  reports,   soil  and
     environmental  reports,  site  plans,  surveys,   working  drawings,   shop
     drawings,  other reports,  drawings and plans and other such documents, and
     all amendments,  modifications,  supplements,  general conditions, addenda,
     additions and changes  thereto,  in each case relating to the Riviera Black
     Hawk;

          (c) all other  contracts,  agreements,  documents and  instruments now
     existing or hereafter arising relating to the Riviera Black Hawk, including
     without limitation any and all construction,  architectural and engineering
     contracts, plans and specifications, drawings, and surveys, bonds, permits,
     licenses and other  governmental  approvals and all other Plans (all of the
     foregoing  in  subsections  (a) - (c),  collectively,  the  "Contracts  and
     Documents"); and

          (d) all proceeds of the foregoing,  including  without  limitation (i)
     whatever  is now  or  hereafter  receivable  or  received  upon  the  sale,
     exchange,  collection  or other  disposition  of any of the  Contracts  and
     Documents, whether voluntary or involuntary,  (ii) any such items which are
     now or hereafter acquired with any proceeds of Contracts and Documents, and
     (iii) any insurance or payments under any  indemnity,  warranty or guaranty
     now or  hereafter  payable  by reason of loss or damage or  otherwise  with
     respect to any Contracts and Documents or any proceeds thereof.

     Notwithstanding  the foregoing,  the Assigned  Collateral shall not include
any of the following (collectively,  the "Excluded Assets"): (A) Gaming Licenses
and Liquor  Licenses,  any other license,  permit or other approval of or by any
Governmental  Authority to the extent that,  under the terms and  conditions  of
such approval or under applicable law, it cannot be subjected to a Lien in favor
of the Trustee without the approval of the relevant Governmental Authority,  but
only to the extent that such approval has not been obtained, (B) any Contract or
Document that is  exclusively  subject to an agreement  with a third party that,
pursuant to its terms, cannot be pledged as security;  provided that the Company
shall use its best efforts to obtain such third party's consent to assignment of
all such  material  agreements;  and (C) any  Contract or  Document  exclusively
relating to (including the respective FF&E Financing  documentation) FF&E to the
extent  financed or refinanced  by, or the proceeds of, an FF&E Financing to the
extent  that (i) the  purchase or lease of such FF&E was not  financed  with the
proceeds of the Notes but with the proceeds of an FF&E Financing in place at the
time of such  purchase and (ii) the Company is permitted to enter into such FF&E
Financing for such FF&E under the Indenture;  provided further that (x) any such
Excluded  Asset now or  hereafter  acquired by the Company  shall  automatically
become  part  of  the  Assigned  Collateral  when  and  to  the  extent  it  may
subsequently  be made  subject  to such a lien  and/or  such  approval  has been
obtained  and/or  such  FF&E  has  been  repaid,  satisfied  or  terminated  (as
applicable),  and (y) all proceeds of any Excluded Assets shall  nevertheless be
subject to the assignment hereunder.  The Assigned Collateral includes,

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without limitation,  those certain contracts and agreements described in Exhibit
"A" attached hereto and made a part hereof.

     2. Rights of the Company.  This  Assignment is an  assignment  for security
purposes only. Accordingly,  notwithstanding  anything to the contrary set forth
herein,  the Company  shall retain all rights with respect to the  Contracts and
Documents,  including without limitation the right to enforce all rights of such
Company  thereunder,  except during a period when an "Event of Default" (as such
term is defined in the Indenture) has occurred and is continuing.

     3.  Representations  and Warranties of the Company.  The Company represents
and warrants to the Trustee as of the date hereof that (a) none of the Contracts
and  Documents  has been  amended or modified  except as set forth  herein or as
previously disclosed in writing to the Trustee, (b) the Company has not assigned
or granted a security  interest in any of the  Contracts  and  Documents  or the
proceeds thereof to anyone other than the Trustee, and (c) the Company is not in
material default, and no event has occurred that with notice or lapse of time or
both would  constitute a material  default by the Company,  or, to its knowledge
any other party, under any of the Contracts and Documents.

     4. Covenants of the Company.  The Company  covenants and agrees in favor of
the Trustee that (a) the Company will not further assign, encumber or suffer the
assignment or  encumbrance of any of the Contracts and Documents or the proceeds
thereof  without  the prior  written  consent of the  Trustee  pursuant to or as
expressly  permitted  under the  Indenture;  (b) the  Company  will  perform and
discharge  each material  obligation,  covenant and agreement to be performed by
the  Company  under each  Contract  and  Document,  at no cost or expense to the
Trustee;  (c) the Company will use its  commercially  reasonable best efforts to
enforce or secure the  performance  of each  material  obligation,  covenant  or
agreement of the counterparty to each Contract and Document; and (d) the Company
will not  modify,  amend,  supplement  or in any way join in the  release of any
rights of the Company under any of the Contracts and Documents or modify, amend,
supplement  or in any  way  join  in the  discharge  of any  obligations  of any
counterparty under any Contract or Document, that is in any material way adverse
to the holders of the Notes, except with the Trustee's written consent.

     5. Limitation of Trustee's  Obligations.  Nothing in this Assignment  shall
constitute an  assumption  of any  obligation by the Trustee under the Contracts
and  Documents.  The Company  shall  continue  to be liable for all  obligations
thereunder and hereby agrees to perform all such obligations, to comply with all
terms and conditions of the Contracts and  Documents,  and to take such steps as
may be necessary  or  appropriate  to secure  performance  by all other  parties
thereto. The Company shall defend,  indemnify and hold the Trustee harmless from
and against all losses,  costs,  liabilities and expenses,  including attorneys'
fees,  arising  from or related to any  failure  by the  Company to perform  any
obligation  of the  Company  under  any of the  Contracts  and  Documents,  such
indemnity and hold harmless  agreement to survive the payment and performance of
the Obligations.

     6. Cure by  Trustee.  At any time upon and  during the  continuation  of an
Event  of  Default,  the  Trustee  shall  have  the  right,  but  shall  have no
obligation,  to take all actions that the Trustee may  determine to be necessary
or  appropriate to cure any default under any of the

                                       3


Contracts  and Documents and to protect the rights of the Company or the Trustee
thereunder,  and may do so in the Trustee's  name, in the name of the Company or
otherwise.  If any such action taken by the Trustee shall prove to be inadequate
or invalid in whole or in part,  the Trustee  shall not incur any  liability  on
account thereof, and the Company hereby agrees to defend, indemnify and hold the
Trustee harmless from and against all losses,  costs,  liabilities and expenses,
including reasonable attorneys' fees, which the Trustee may incur or to which it
may become subject in exercising any of its rights under this Assignment, except
for those  arising  from the  gross  negligence  or  willful  misconduct  of the
Trustee,  such indemnity and hold harmless  agreement to survive the payment and
performance of the Obligations.

     7. Rights and  Remedies.  Upon the  occurrence of an Event of Default under
the Indenture,  irrespective  of whether a notice of default has been given with
respect to such Event of Default (unless required by the Indenture), and with or
without  bringing  any action or  proceeding,  the  Trustee  may, at its option,
succeed to and proceed to enforce all of the rights,  interests  and remedies of
the Company under the Contracts and Documents,  amend, modify, cancel, terminate
or replace the same, reassign the Company's right, title and interest therein to
any other person, and exercise any and all other rights of the Company under the
Contracts  and  Documents,  either in person or  through an agent,  receiver  or
keeper,  without further notice to or consent by the Company, and without regard
to the adequacy of security for the Obligations or the availability of any other
remedies. The exercise of any of the foregoing rights or remedies shall not cure
or waive any Default under the Indenture or any other Transaction  Document,  or
waive, modify or affect any notice of default thereunder,  or invalidate any act
done pursuant to any such notice.  In addition to the rights and remedies of the
Trustee as set forth in this  Assignment,  the Trustee  shall be entitled to the
benefit of all other  rights and  remedies  set forth in the  Indenture  and the
other  Transaction  Documents,  at  law  or  in  equity.  Without  limiting  the
foregoing,  the Company hereby irrevocably constitutes and appoints the Trustee,
upon the  occurrence and during the  continuance of an Event of Default,  as its
attorney-in-fact  to demand,  receive  and  enforce  the  Company's  rights with
respect to the Contracts and Documents,  to give appropriate receipts,  releases
and satisfactions  for and on behalf of the Company,  and to do any and all acts
in the name of the Company  with the same force and effect as the Company  could
do if this  Assignment had not been made.  Such  appointment is irrevocable  and
coupled with an interest  until payment in full and complete  performance of all
the  Obligations.  The Trustee may appoint a  substitute  attorney-in-fact.  The
Company ratifies all actions taken by the attorney-in-fact but, nevertheless, if
the Trustee requests,  the Company will specifically  ratify any action taken by
the  attorney-in-fact by executing and delivering to the  attorney-in-fact or to
any entity designated by the  attorney-in-fact all documents necessary to effect
such ratification.

     8.  Additional  Instruments.  With  respect  to both  existing  and  future
Contracts and Documents,  the Company  hereby agrees to execute and deliver,  at
its sole cost and expense,  such  additional  assignments and other documents as
the Trustee may reasonably  request in order to implement the provisions of this
Assignment.

     9. Miscellaneous; Governing Law. This Assignment shall inure to the benefit
of and be binding  upon the parties  hereto and their  respective  heirs,  legal
representatives,  successors  and assigns.  In any action or proceeding  arising
from or related to this  Assignment,  the prevailing  party shall be entitled to
recover its reasonable  costs and attorneys'  fees.  The reference to

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"attorneys'  fees" in this Assignment shall include,  without  limitation,  such
reasonable  amounts  as may then be charged by the  Trustee  for legal  services
furnished  by  in-house  attorneys  in the employ of the  Trustee,  at rates not
exceeding such reasonable  rates that would be charged by outside  attorneys for
comparable  services.  This Assignment shall be governed by the internal laws of
the State of New York,  except to the extent that  perfection and enforcement of
the security  interests  and  assignment  hereunder  are governed by the laws of
another jurisdiction.

     10.  Gaming Laws and  Regulations.  The Company  acknowledges  that, to the
extent  required under  applicable  law, the  consummation  of the  transactions
contemplated hereby and the exercise of remedies hereunder may be subject to the
Colorado  Limited Gaming Act and the  regulations  promulgated  pursuant to each
such  law,  all as  amended  from  time to  time.  The  parties  hereto  further
acknowledge  that the  Gaming  License  held by the  Company  is not part of the
collateral of this Assignment and that,  under the above  described  legislation
and rules promulgated thereunder, the Trustee may be precluded from or otherwise
limited in taking  possession of or in selling the collateral of this Assignment
under the  rights  and  remedies  provisions  of this  Assignment  and the other
Transaction  Documents.  The parties hereto also acknowledge that due to various
legal  restrictions,  including  without  limitation  licensing  of operators of
gaming  facilities  and prior approval of the sale or disposition of assets of a
licensed  gaming  operation,  the sale of  collateral  may be  denied  by Gaming
Authorities or delayed pending approval of Gaming Authorities.

     11. Severability.  If any provision or obligation of this Assignment should
be found to be  invalid,  illegal  or  unenforceable  in any  jurisdiction,  the
validity,   legality  and   enforceability  of  the  remaining   provisions  and
obligations or any other agreement executed in connection  herewith,  or of such
provision  or  obligation  in any  other  jurisdiction,  shall not in any way be
affected or  impaired  thereby  and shall  nonetheless  remain in full force and
effect to the maximum extent permitted by law.

     12. Conflicts with Indenture.  Notwithstanding  any other provision of this
Assignment,  the terms and  provisions of this  Assignment  shall be subject and
subordinate  to the terms of the  Indenture.  To the extent  that the  Indenture
provides the Company with a particular cure or notice period, or establishes any
limitations  or conditions on the Trustee's  actions with regard to a particular
set of facts,  the Company shall be entitled to the same cure periods and notice
periods, and the Trustee shall be subject to the same limitations and conditions
in  place  of the cure  periods,  notice  periods,  limitations  and  conditions
provided for under the  Indenture;  provided,  however,  that such cure periods,
notice periods,  limitations  and conditions  shall not be cumulative as between
the  Indenture  and this  Assignment.  In the event of any conflict  between the
provisions of this  Assignment  and those of the  Indenture,  including  without
limitation  any  conflicts  or  inconsistencies  in any  definitions  herein  or
therein, the applicable provisions or definitions of the Indenture shall govern.

     13.  Counterparts.   This  Assignment  may  be  executed  in  one  or  more
counterparts,  each of  which  shall  be  deemed  an  original  but all of which
together shall constitute one and the same instrument.

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     IN WITNESS WHEREOF, the Company has executed this Collateral  Assignment as
of the date first above written.



                                      RIVIERA BLACK HAWK, INC.,
                                      a Colorado corporation



                                      By:
                                          --------------------------------------
                                      Name:
                                      Title:





ACKNOWLEDGED AND AGREED

IBJ WHITEHALL BANK & TRUST COMPANY,
a New York banking association,



By:
    --------------------------------------
Name:
Title:

                   [Signature Page to Collateral Assignment]





                              COLLATERAL ASSIGNMENT

                                   EXHIBIT "A"

                             CONTRACTS AND DOCUMENTS
                             -----------------------


1.   Trademark License Agreement,  dated June 3, 1999, between Riviera Operating
     Corporation and the Company.

2.   Subdivision Agreement,  dated February 20, 1998 (as amended),  entered into
     between the City of Black Hawk and the Company.

3.   Standard Form of Agreement Between Owner and Contractor, dated December 29,
     1997 (as amended), between The Weitz Company, Inc., and the Company.

4.   Performance Bond No. 19-30-19, dated December 24, 1997, among American Home
     Assurance Company, The Weitz Company, Inc., and the Company.

5.   Management Agreement, dated June 3, 1999, between Riviera Gaming Management
     of Colorado, Inc., and the Company.

6.   Standard  Form of Agreement  Between  Owner and  Architect,  dated July 29,
     1998, between Melick Associates, Inc., and the Company.

7.   The Completion  Capital  Commitment,  dated June 3, 1999,  between  Riviera
     Holdings Corporation and the Company.

8.   The  Keep-Well  Agreement,  dated June 3, 1999,  between  Riviera  Holdings
     Corporation and the Company.


                                      A-1