KEEP-WELL AGREEMENT

          Keep-Well  Agreement  (this  "Agreement")  dated  as of June 3,  1999,
between Riviera Holdings Corporation, a Nevada corporation ("Riviera Holdings"),
and RIVIERA BLACK HAWK, INC., a Colorado corporation (the "Company").

                                 R E C I T A L S

          A. First Mortgage Notes. The Company has issued $45,000,000  aggregate
principal  amount of 13% First Mortgage Notes due 2005 With Contingent  Interest
(together  with all notes  issued  in  exchange  or  replacement  therefor,  the
"Notes")  pursuant  to an  Indenture  (as  amended,  supplemented  or  otherwise
modified from time to time, the "Indenture") dated as of the date hereof between
the  Company  and  IBJ  Whitehall  Bank &  Trust  Company,  a New  York  banking
association,  as trustee  (the  "Trustee"),  for the benefit of the holders from
time to time (the "Holders") of the Notes.

          B.  Proceeds of the Notes.  The Company  will use the  proceeds of the
Notes for the development,  construction, equipping and operation of the Riviera
Black Hawk (as defined in the Indenture)  upon certain real property  located in
Black Hawk,  Colorado (the "Property") and for certain other purposes  described
in the Indenture.

          C. Riviera Holdings' Benefit. The Company is a wholly-owned subsidiary
of Riviera  Holdings  and,  as a result,  Riviera  Holdings  will  significantly
benefit from the construction and operation of the Riviera Black Hawk.

          D.  Material  Inducement.  It is a condition  precedent  and  material
inducement  to the  purchase  of the Notes  that (1)  Riviera  Holdings  and the
Company  shall have  executed  and  delivered  this  Agreement  whereby  Riviera
Holdings has agreed that it will commit,  subject to the  limitations  set forth
herein,  for the  benefit  of the  Company  and  the  Holders,  to make  capital
contributions to the Company upon the terms, conditions and limitations provided
herein, (2) the Company shall have executed the Collateral  Assignment assigning
this Agreement,  among other things,  to the Trustee,  and (3) Riviera  Holdings
shall have  executed  and  delivered  the Consent to  Collateral  Assignment  of
Keep-Well  Agreement  pursuant to which,  among other things,  Riviera  Holdings
consents to the Company's assignment of this Agreement to the Trustee.

          E.  Definitions.  Capitalized  terms  used and not  otherwise  defined
herein shall have the meanings ascribed thereto in the Indenture.

                                A G R E E M E N T

          NOW, THEREFORE,  in consideration of the foregoing  recitals,  and for
other good and valuable consideration,  the receipt and sufficiency of which are
hereby acknowledged, Riviera Holdings and the Company hereby agree as follows:

         1.    Definitions.

          "Contribution  Limitation"  means the product of (i) $1.25 million and
(ii) the



number  of  fiscal  quarters  of  Riviera  Holdings  contained  in the  relevant
Operating Period.

          "First  Operating  Period" means the period beginning on the first day
of Riviera  Holdings'  first full fiscal  quarter  after the Riviera  Black Hawk
becomes Operating through and including the last day of the fiscal year of which
such fiscal quarter is a part.

          "Fourth  Operating  Period"  means the  period  beginning  immediately
following the end of the Third  Operating  Period through and including the last
day of the full  fiscal  quarter  of  Riviera  Holdings  ending  after the third
anniversary of the date on which the Riviera Black Hawk became Operating.

          "Funding Amounts" means the Interest  Contribution  Amount (as defined
below) and the Cash Flow Contribution Amount (as defined below).

          "Operating  Period" means any of the First  Operating  Period,  Second
Operating Period, Third Operating Period or Fourth Operating Period.

          "Second  Operating  Period"  means the first  fiscal  year of  Riviera
Holdings after the First Operating Period.

          "Target  Consolidated Cash Flow" means, for any Operating Period,  the
product of (i) $2.25  million and (ii) the number of fiscal  quarters of Riviera
Holdings contained in such Operating Period.

          "Third  Operating  Period"  means the  first  fiscal  year of  Riviera
Holdings after the Second Operating Period.

          2.   Riviera Holdings' Commitments.

               2.1. Fixed Interest Contribution  Commitment.  Subject to Section
          2.3 below,  at least ten days prior to each date on which the  Company
          is required to pay the fixed interest payable on the Notes (the "Fixed
          Interest Payment") which occurs before the end of the Fourth Operating
          Period (each an "Fixed Interest  Payment  Date"),  if the Company does
          not have sufficient  funds to make the required Fixed Interest Payment
          on the Notes,  the Company shall deliver to Riviera  Holdings  (with a
          copy to the Trustee) a certificate stating:

               (i) the amount of the Fixed Interest Payment required to be made;

               (ii) the amount of funds the  Company has  available  to make the
          Fixed Interest  Payment (after taking into account  amounts on deposit
          in the Interest Reserve Account); and

               (iii) the amount of  additional  cash that is needed in order for
          the Company to make the Fixed  Interest  Payment (the "Fixed  Interest
          Contribution Amount").

                                       2


Subject to Section  2.3  below,  Riviera  Holdings  hereby  unconditionally  and
irrevocably  agrees that, at least one business day prior to the relevant  Fixed
Interest Payment Date, Riviera Holdings will make a capital contribution in cash
to the Company in an amount equal to any Fixed Interest Contribution Amount.

               2.2. Cash Flow Commitment.  Subject to Section 2.3 below,  within
          30 days after the end of each  Operating  Period,  the  Company  shall
          deliver to Riviera Holdings (with a copy to the Trustee) a certificate
          stating:

                    (i) the amount of the Target Consolidated Cash Flow for such
               Operating Period;

                    (ii) the Company's  estimate,  through its regular  internal
               accounting  procedures,  of its  Consolidated  Cash Flow for such
               Operating Period (the "Applicable Consolidated Cash Flow"); and

                    (iii) the  amount of the Target  Consolidated  Cash Flow for
               such Operating Period less the Applicable  Consolidated Cash Flow
               for such period determined as set forth in clause (ii) above (the
               "Cash Flow Contribution Amount").

          Subject to Section 2.3 below, Riviera Holdings hereby  unconditionally
          and  irrevocably  agrees  that,  within  45  days  of the  end of each
          Operating  Period,  if the  Cash  Flow  Contribution  Amount  for such
          Operating  Period is a positive  number,  Riviera Holdings will make a
          capital contribution in cash to the Company in an amount equal to such
          Cash Flow Contribution Amount, less any amounts previously contributed
          by Riviera  Holdings  to the  Company  during  such  Operating  Period
          pursuant to Section 2.1 hereof.

               2.3. Contribution Limitations. Notwithstanding any other terms of
          this Agreement to the contrary,  (i) the aggregate amount that Riviera
          Holdings  shall  be  required  to  contribute  to the  Company  in any
          Operating  Period  pursuant to Section 2.1 hereof and with  respect to
          any such  Operating  Period  pursuant  to Section  2.2 hereof will not
          exceed  the  applicable  Contribution  Limitation  for such  Operating
          Period and (ii) the aggregate  amount that Riviera  Holdings  shall be
          required  to  contribute  to the  Company  in and with  respect to all
          Operating  Periods  pursuant to  Sections  2.1 and 2.2 hereof will not
          exceed $10.0 million.

          3.  Cooperation.  In connection with this Agreement,  Riviera Holdings
agrees, at its sole cost and expense, to fully cooperate with the Company and to
timely provide such documents,  agreements and information as may be required in
connection herewith.

          4. Ability to Comply With This Agreement.  Riviera  Holdings shall, at
all  times  prior  to the  fulfillment  of all of  its  obligations  under  this
Agreement,  ensure that it has the  ability to fulfill  all of such  obligations
under all other agreements to which it is a party, including the Indenture dated
as of August  13,  1997,  among  Riviera  Holdings,  the  subsidiary  guarantors
identified therein and Norwest Bank Minnesota, National Association, as trustee,
relating to the

                                       3


issuance of $175,000,000  principal  amount of 10% First Mortgage Notes due 2004
of Riviera Holdings.

          In  addition,  Riviera  Holdings  shall not,  at any time prior to the
fulfillment of all of its  obligations  under this  Agreement,  permit any other
agreement to which it is a party to in any way  prohibit or  interfere  with its
ability to fulfill its obligations under this Agreement.

          5. Alteration of Obligations. Riviera Holdings acknowledges and agrees
that none of the following shall release,  impair, reduce, diminish or otherwise
affect Riviera Holdings'  obligations under this Agreement:  (i) any alteration,
compromise,  acceleration  or extension  of, or any change to, (a) the Company's
obligations  to complete  the  development,  construction  and  equipping of the
Riviera  Black Hawk and to  commence  operation  thereof  or (b) the  payment or
performance by the Company or any guarantor  under any debt  instrument or other
financing  for the  development,  construction,  equipping  or  operation of the
Riviera Black Hawk (the foregoing,  collectively,  the  "Obligations"),  in each
case in such manner, upon such terms and at such times as any Person (including,
without limitation,  the Trustee or any Holder) (each such Person, an "Obligee")
deems best,  and  without  notice to Riviera  Holdings;  (ii) the release of the
Company or any guarantor  from any or all of the  Obligations by acceptance of a
deed  in lieu of  foreclosure  or  otherwise,  as to all or any  portion  of the
Obligations;  (iii) the  release,  substitution  or  addition of any one or more
guarantors  or endorsers  of the Funding  Amounts or the  Obligations;  (iv) the
acceptance of additional or substitute  security for the Funding  Amounts or the
Obligations; or (v) the release or subordination of any security for the Funding
Amounts  or  the  Obligations.  No  exercise  (including,   without  limitation,
foreclosure  of the  Property) or  non-exercise  of any right under any document
relating to the Obligations  (collectively,  the  "Obligation  Documents") by an
Obligee,  no dealing by an Obligee hereunder or under any Obligation Document or
any other document with Riviera Holdings, the Company or any other guarantors or
any other Person, and no change,  impairment or release of all or any portion of
the Funding  Amounts or the  Obligations or suspension of any right or remedy of
an Obligee against any other Person, including,  without limitation, the Company
or any other such guarantor,  endorser or other Person,  shall in any way affect
any of the obligations of Riviera Holdings  hereunder or any security  furnished
by Riviera  Holdings or give Riviera  Holdings  any recourse  against an Obligee
(including,  without limitation,  the Trustee).  If an Obligee has exculpated or
hereafter  exculpates  the Company from  liability  in whole or in part,  or has
agreed or hereafter  agrees to look solely to the Property or any other property
for the satisfaction of the Company's Obligations (including, without limitation
the  Company's  obligations  under the  Indenture,  the Notes or any  Collateral
Document),  such  exculpation  and agreement shall not affect the obligations of
Riviera Holdings hereunder.  Riviera Holdings further acknowledges that any such
exculpation or agreement  that has been given or that is hereafter  given to the
Company with respect to the Notes, the Indenture or any Collateral  Document has
been  given or is given in  reliance  upon the  covenants  of  Riviera  Holdings
contained herein.

          6. Obligations  Absolute;  Waiver. The obligations of Riviera Holdings
hereunder shall be unconditional (in accordance with the terms hereof), absolute
and continuing and, without limiting the generality of the foregoing,  shall not
be released, discharged or otherwise affected by, and shall survive, and Riviera
Holdings  hereby  waives and  relinquishes  all rights and remedies  accorded by
applicable  law to  sureties  or  guarantors  and  agrees  not to assert or take
advantage of

                                       4


any such rights or remedies,  including,  without  limitation,  (a) any right to
require  any  holder  or  recipient  of the  benefit  of any of the  Obligations
(including,  without limitation,  the Trustee or the Holders) (each a "Benefited
Party")  to proceed  against  the  Company  or any other  Person or entity or to
proceed against or exhaust any security held by a Benefited Party at any time or
to pursue any other remedy in the power of a Benefited  Party before  proceeding
against Riviera  Holdings;  (b) the defense of the statute of limitations in any
action  hereunder  or in any action for the  collection  or  performance  of the
Funding Amounts or the Obligations;  (c) any defense that may arise by reason of
the  incapacity,  lack of authority,  death or disability of any other Person or
the failure of a Benefited  Party to file or enforce a claim  against the estate
(in administration, bankruptcy or any other proceeding) of any other Person; (d)
appraisal,   valuation,  stay,  extension,  marshaling  of  assets,  redemption,
exemption,  diligence,  demand,  presentment,  protest  and  notice of any kind,
including, without limitation, notice of the existence, creation or incurring of
any new or additional  indebtedness or obligation or of any action,  non-action,
performance or failure to perform on the part of a Benefited Party, the Company,
any  endorser or  creditor of the Company or Riviera  Holdings or on the part of
any other  Person  under this or any other  instrument  in  connection  with any
obligation or evidence of  indebtedness  held by a Benefited Party as collateral
or in connection  with the Funding Amounts or the  Obligations;  (e) any defense
based upon any exercise of remedies, including, without limitation,  foreclosure
of the  Property,  or  upon  an  election  of  remedies  by a  Benefited  Party,
including,  without  limitation,  an election to proceed by non-judicial  rather
than judicial  foreclosure,  which destroys or otherwise impairs the subrogation
rights of Riviera Holdings, the right of Riviera Holdings to proceed against the
Company or any other person for  reimbursement,  or both;  (f) any defense based
upon any statute or rule of law which  provides that the  obligation of a surety
must be neither larger in amount nor in other respects more burdensome than that
of the principal;  (g) any duty on the part of a Benefited  Party to disclose to
Riviera Holdings any facts a Benefited Party may now or hereafter know about the
Company or any other Person,  regardless of whether a Benefited Party has reason
to believe  that any such facts  materially  increase the risk beyond that which
Riviera Holdings intends to assume, or has reason to believe that such facts are
unknown to Riviera Holdings, or has a reasonable opportunity to communicate such
facts to Riviera  Holdings,  since Riviera  Holdings  acknowledges  that Riviera
Holdings is fully  responsible  for being and keeping  informed of the financial
condition of the Company or any other Person and of all circumstances bearing on
the risk of non-payment of any Funding Amounts;  (h) any defense arising because
of the election of a Benefited  Party,  in any proceeding  instituted  under the
Federal Bankruptcy Code, of the application of Section 1111(b)(2) of the Federal
Bankruptcy Code; (i) any defense based upon any borrowing or grant of a security
interest  under  Section 364 of the Federal  Bankruptcy  Code;  (j) any claim or
other rights which it may now or  hereafter  acquire  against the Company or any
other Person that arises from the existence or performance of Riviera  Holdings'
obligations  under this Agreement or any other Obligation  Document,  including,
without  limitation,  any  right  of  subrogation,  reimbursement,  exoneration,
contribution,  indemnification,  any right to participate in any claim or remedy
by a Benefited  Party  against the Company or any  collateral  which a Benefited
Party now has or hereafter acquires,  whether or not such claim, remedy or right
arises in equity or under  contract,  statute or common law, by any payment made
hereunder or  otherwise,  including,  without  limitation,  the right to take or
receive from the Company or any other Person or entity,  directly or indirectly,
in cash or other  property  or by  set-off  or in any other  manner,  payment or
security on account of such claim or other  rights;  (k) any rights which it may
acquire by way of contribution

                                       5


under this Agreement or any Obligation  Document,  by any payment made hereunder
or otherwise,  including,  without limitation, the right to take or receive from
any other  Person,  directly  or  indirectly,  in cash or other  property  or by
set-off  or in any  other  manner,  payment  or  security  on  account  of  such
contribution  rights;  (l) any defense  based on  one-action  laws and any other
anti-deficiency  protections  granted to guarantors  by applicable  law; (m) any
merger or  consolidation  of the Company into or with any other  Person,  or any
sale,  lease or transfer of any or all of the assets of the Company to any other
Person; (n) any circumstance which might constitute a defense available to, or a
discharge  of,  the  Company,  Riviera  Holdings  or a  surety;  (o) any lack of
genuiness, validity, regularity, enforceability or value of any Funding Amounts,
this  Agreement  or  any  Obligation  Document;   and  (p)  any  other  fact  or
circumstance,  including, without limitation, any fact or circumstance having an
impact  on the cash flow of or the  availability  of funds to the  Company.  Any
proceeds  of a  foreclosure  or  similar  sale  may  be  applied  first  to  any
obligations  of the  Company  that do not also  constitute  Funding  Amounts  or
Obligations.  Notwithstanding the foregoing,  nothing in this Section 6 shall be
deemed to impair or modify the rights or obligations  otherwise  expressly given
to or  agreed  to by  Riviera  Holdings  in any of the Loan  Documents.  Riviera
Holdings  acknowledges  and agrees that any nonrecourse or exculpation  provided
for in any Obligation Document, or any other provision of an Obligation Document
limiting each respective  Benefited  Party's recourse to specific  collateral or
limiting such Benefited  Party's right to enforce a deficiency  judgment against
the  Company,  shall  have  absolutely  no  application  to  Riviera  Holdings's
liability  under  this  Agreement.  To  the  extent  that  any  Benefited  Party
(including,  without  limitation,  the Trustee) collects or receives any sums or
payments from the Company or from any guarantor,  endorser or other Person under
any  Obligation  Document or realized from any security,  such  Benefited  Party
shall have the right,  but not the  obligation,  to apply such amounts  first to
that portion of the  Company's  indebtedness  and  obligations,  if any, to such
Benefited Party that is not covered by this Agreement,  regardless of the manner
in which any such  payments or amounts are  characterized  by the Person  making
payment.

          7.  Bankruptcy  and Related  Proceedings.  The  obligations of Riviera
Holdings under this Agreement shall not be altered, limited or affected by or as
a result of any action  taken by the  Company in any  proceeding,  voluntary  or
involuntary, involving the bankruptcy, reorganization, insolvency, receivership,
or liquidation  of the Company,  or by any defense which the Company may have by
reason of any order,  decree or  decision  of any court or  administrative  body
resulting from any such proceeding.

          8.  Interest.  If Riviera  Holdings fails to pay all or any portion of
the Funding Amounts in accordance with the provisions hereof, the amount of such
Funding Amounts and all other sums payable by Riviera  Holdings  hereunder shall
bear  interest  from the date of demand at the highest  rate  applicable  to the
principal  balance of the Notes or, if the Notes have been fully repaid,  at the
highest rate that would be applicable if the Notes had not been fully repaid.

                                       6


          9.  Independent  Obligations.  The  obligations  of  Riviera  Holdings
hereunder are  independent of the obligations of the Company or any other Person
and, in the event of any default hereunder,  a separate action or actions may be
brought and prosecuted  against Riviera Holdings,  whether or not the Company or
such other Person is joined therein or a separate  action or actions are brought
against the Company.

          10. Notices.  Whenever Riviera Holdings or the Company shall desire to
give or serve any notice, demand, request or other communication with respect to
this Agreement, each such notice shall be in writing and shall be effective only
if the same is delivered  by  hand-delivery,  first-class  mail  (registered  or
certified,  return receipt  requested),  telecopier or air courier  guaranteeing
overnight delivery, addressed as follows:

                  To Riviera Holdings:

                           Riviera Holdings Corporation
                           2701 Las Vegas Boulvard South
                           Las Vegas, Nevada 89109
                           Attention: Executive Vice President of Finance
                           Telephone: (702) 734-5110
                           Facsimile: (702) 734-9277

                  To the Company:

                           Riviera Black Hawk, Inc.
                           444 Main Street
                           Black Hawk, Colorado 80422
                           Attention: Executive Vice President of Finance
                           Telephone: (702) 734-5110
                           Facsimile: (702) 734-9277

                  and, in either case, with a copy to the Trustee at:

                           IBJ Whitehall Bank & Trust Company
                           One State Street
                           New York, New York 10004
                           Attention:  Thomas S. Moser
                           Telephone: (212) 858-2558
                           Facsimile: (212) 858-2956

Any such notice delivered  personally shall be deemed to have been received upon
delivery.  Any such  notice  sent by  telegram  shall be  presumed  to have been
received by the addressee one business day after its  acceptance  for sending by
an authorized carrier thereof. Any such notice sent by mail shall be presumed to
have been  received by the  addressee  three  business days after posting in the
United  States mail.  Riviera  Holdings or the Company may change its address by
giving the other and the  Trustee a written  notice of the new address as herein
provided.

                                       7


          11. Successors and Assigns.  This Agreement shall inure to the benefit
of the Company,  its successors  and assigns,  and shall bind the successors and
assigns of Riviera Holdings.

          12. No Guarantee.  Nothing contained in this Agreement shall be deemed
to be a guarantee by Riviera  Holdings of any  obligations  of the Company under
the Notes.

          13. Miscellaneous Provisions.

               13.1.  This  Agreement  shall be  governed  by and  construed  in
          accordance  with the laws of the State of New York.  Riviera  Holdings
          hereby consents to the  jurisdiction of the courts of the State of New
          York and consents to service of process by any means authorized by New
          York law in any action brought under or arising from this Agreement.

               13.2.  Riviera  Holdings  acknowledges  that it is  aware  of the
          Indenture  entered  into by the  Company  and the  Trustee,  the Notes
          issues thereunder and the Collateral  Documents executed in connection
          therewith  and is  generally  familiar  with the terms and  provisions
          thereof.

               13.3 This  Agreement  shall  constitute  the entire  agreement of
          Riviera  Holdings with the Company with respect to the subject  matter
          hereof,  and no  representation,  understanding,  promise or condition
          concerning the subject matter hereof shall be binding upon the Company
          unless expressed herein.

               13.4 Should any term,  covenant,  condition  or provision of this
          Agreement  be  determined  to be illegal or  unenforceable,  all other
          terms, covenants,  conditions and provisions hereof shall nevertheless
          remain in full force and effect.

               13.5.  When the context and  construction  so require,  all words
          used in the singular herein shall be deemed to include the plural, the
          masculine shall include the feminine and neuter, and vice versa.

               13.6.  No  provision of this  Agreement  or right  granted to the
          Company  hereunder can be waived in whole or in part,  nor can Riviera
          Holdings  be  released  from its  obligations  hereunder,  except by a
          writing duly executed by an authorized officer of the Company.

               13.7. The headings of this Agreement are inserted for convenience
          only and shall have no effect upon the construction or  interpretation
          hereof.

                            (Signature Page Follows)

                                      8



          IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

                          RIVIERA HOLDINGS CORPORATION,
                          a Nevada corporation



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


                          RIVIERA BLACK HAWK, INC.,
                          a Colorado corporation



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







                    [Signature Page to Keep-Well Agreement]