TAX SHARING AGREEMENT

         Tax Sharing Agreement (the  "Agreement"),  dated as of June 3, 1999, by
and among  RIVIERA  HOLDINGS  CORPORATION,  a Nevada  corporation  ("RHC"),  and
RIVIERA BLACK HAWK, INC., a Colorado corporation ("RBH").

         WHEREAS,   RHC  is  the  common  parent  of  an  affiliated   group  of
corporations  within the meaning of Section 1504(a) of the Internal Revenue Code
of 1986, as amended (the "Code"), and RBH, a wholly-owned  subsidiary of RHC, is
a member of said affiliated group (the "RHC Group");

         WHEREAS, the RHC Group, to the extent permitted by applicable law, will
file consolidated  federal income tax returns under the Code;

         WHEREAS,  RHC  and RBH  wish  to  provide  for  the  allocation  of the
consolidated deferral income tax liability for the RHC Group;

         NOW, THEREFORE, in consideration of the foregoing premises, the parties
hereto agree as follows:

     1. DEFINITIONS.

         (a) Terms used in this  Agreement  shall have the meanings  ascribed to
them in, and shall be interpreted in accordance with, the relevant provisions of
the Code and the regulations and rulings issued thereunder, as from time to time
in effect.

         (b) Tax - Regular  federal/corporate  income  tax or  federal/corporate
alternative  minimum tax, together with any and all interest,  additions to tax,
fines and penalties payable with respect thereto.




     2.   FILING OF  CONSOLIDATED RETURNS AND PAYMENT OF TAX.

         RHC shall,  on a timely basis,  file or cause to be filed  consolidated
federal  income tax returns and estimated tax returns for the RHC Group for each
taxable  year and shall pay in full any Tax shown due on such  returns.  RHC, in
its sole  discretion,  shall make all  elections  relating to the filing of such
returns,  and shall compute the consolidated federal income tax liability of the
RHC Group.  RBH shall execute such consents and other documents as are necessary
in connection  therewith.

     3.   ALLOCATION  OF  CONSOLIDATED  FEDERAL  INCOME TAX LIABILITY

         (a) Except as otherwise  provided in paragraphs  3(c) and 3(d), RHC and
RBH agree  that RBH  shall pay to RHC shall pay to RHC an amount  (not less than
zero) equal to the Separate Tax Liability of RBH. The  "Separate Tax  Liability"
of RBH  shall  be the  federal  tax  liability  of RBH for the  taxable  period,
determined as if RBH were at all times subject to federal  income  taxation as a
separate taxpayer,  not included or includable in the RHC Group (or in any other
consolidated group);  provided,  however,  that such determination shall be made
without regard to any carrybacks or  carryforwards  of any tax attributes of RBH
(including, without limitation, net operating losses) that would be available to
it if it, at all times,  had filed a separate  federal  income tax  return,  but
which in fact are not available  under  applicable  federal  income tax law as a
result of its  inclusion in the RHC Group;  provided,  further,  that:  (i) such
determination  shall  be made  giving  effect  to the  modifications  listed  in
Treasury Regulation Section 1.1552-1(a) (2)(ii);(ii) such determination shall be
computed  using the  highest  marginal  corporate  Tax rate in  effect  for such
taxable period;  (iii) if, for any taxable period, a Tax would be imposed on RBH
pursuant to Section 55 of the Code,  the Separate Tax  Liability of RBH shall be
increased  by the

                                       2


amount of Tax that would be imposed  on RBH under  such Code  section,  computed
using the  alternative  minimum  tax rate set forth in Section  55(b) (1) of the
code and taking into account  items  specified in Section  55(b) (2) of the Code
attributable  to RBH;  (iv)  such  determination  shall be made  using  the same
elections and methods of accounting as are used in determining the  consolidated
deferral income tax liability of the RHC Group for such taxable period;  and (v)
notwithstanding  any provision herein to the contrary,  in no event shall RBH be
required to make any payment  hereunder  to the extent that such  payment  would
cause (or increase) a violation of any "minimum bankroll  requirement," or other
applicable  gaming  obligation,  except to the extent such  payment  constitutes
RBH's  share  of the RHC  Group's  federal  income  tax  liability  based on its
contribution   to  the  RHC  Group's   consolidated   taxable  income  (as  such
contribution   would   be   determined   under   Treasury   Regulation   Section
1.1552-1(a)(1),  regardless of whether such regulation is actually applicable to
the RHC Group for any purpose) or is otherwise  required of RBH under applicable
federal income tax law.

         (b) Not less than  fifteen  (15) days prior to the day the RHC  Group's
consolidated federal income tax return is required to be filed in respect of any
taxable year (taking account of any extensions thereof), RHC shall provide RBH a
schedule that sets forth in reasonable  detail the  calculation  of the Separate
Tax Liability for such taxable  year.  The amount  required to be paid by RBH to
RHC pursuant to paragraph  3(a) of this Agreement for such taxable year shall be
paid not  later  than five (5) days  prior to the date on which the RHC  Group's
consolidated  federal income tax return is required to be filed for such taxable
year (taking account of any extension thereof).

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         (c) If the RHC Group is required to make payments of estimated  federal
income tax,  then, no later than five (5) days from the date the RHC Group would
be required to make such  payments,  RBH shall make payments to RHC in an amount
equal to the Estimated Tax Liability of RBH. The  "Estimated  Tax  Liability" of
RBH shall be the federal  estimated Tax liability of RBH for the taxable period,
determined as if the RBH were at all times subject to federal income taxation as
a separate  taxpayer,  not  included or  includable  in the RHC Group (or in any
other consolidated group);  provided,  however, that such determination shall be
made without regard to any carrybacks or  carryforwards of any tax attributes of
RBH  (including,  without  limitation,  net  operating  losses)  that  would  be
available under  applicable  federal income tax law as a result of its inclusion
in the RHC Group; provided,  further, that: (i) such determination shall be made
by giving  effect to the  modifications  listed in Treasury  Regulation  Section
1.1552-1(a)(2)(ii);  (ii) such determination shall be computed using the highest
marginal corporate Tax rate in effect for such taxable period; (iii) if, for any
taxable  period,  a Tax would be  imposed on RBH  pursuant  to Section 55 of the
Code, the Estimated tax Liability of RBH shall be increased by the amount of Tax
that  would be  imposed  on RBH under  such  Code  section,  computed  using the
alternative  minimum  tax rate set  forth in  Section  55(b)(1)  of the Code and
taking  into  account  items   specified  in  Section  55(b)  (2)  of  the  Code
attributable  to RBH  (iv)  such  determination  shall  be made  using  the same
elections and methods of accounting as are used in determining the  consolidated
federal income tax liability for the RHC Group for such taxable period;  and (v)
notwithstanding  any provision herein to the contrary,  in no event shall RBH be
required  to make any  payment  hereunder  to the extent  that,  prior to giving
effect to the  Operating  Agreement,  such payment  would cause (or  increase) a
violation of any  "minimum  bankroll

                                       4



requirement" or other applicable  gaming  obligation,  except to the extent such
payment constitutes RBH's share of the RHC Group's  consolidated  taxable income
(as such  contribution  would be determined  under Treasury  Regulation  Section
1.1552-1(a)(1),  regardless of whether such regulation is actually applicable to
the RHC Group for any  purpose) or is required of RBH under  applicable  federal
income tax law.

         Any payment made by RBH to RHC pursuant to this paragraph 3(c) shall be
applied to reduce the amount,  if any, owing by RBH to RHC for the corresponding
taxable year pursuant to paragraphs  3(a) and 3(b).  Any excess of the aggregate
of payments  made by RBH pursuant to this  paragraph  3(c) during a taxable year
over the payment,  if any, owing by RBH to RHC for such taxable year pursuant to
paragraphs 3(a) and 3(b),  shall be repaid to RBH by RHC: (i) to the extent such
excess (or part thereof) represents all or a part of a tax refund to be received
by the RHC Group,  such  repayment to be made not later than five (5) days after
the receipt of such  refund;  (ii) to the extent  such excess (or part  thereof)
represents all or part of a credit  against the RHC Group's  estimated Tax for a
succeeding  taxable  year,  not later than five (5) days after an estimated  Tax
payment against which such excess is credited otherwise is to be paid by RHC; or
(iii)  to the  extent  clauses  (i) of  this  paragraph  3(c)  and  (ii) of this
paragraph  3(c) do not apply to such  excess (or a portion  thereof),  not later
than the date on which the RHC Group's consolidated federal income tax return is
required to be filed  (taking into account any  extension  thereof).

         (d) If the calculation of the Separate Tax Liability of RBH for any tax
year results in a net  operating  loss ("BH NOL"),  RHC shall credit the RBH NOL
against  the  amount  which RBH would  otherwise  have to pay to RHC in the next
succeeding  tax year or years  until

                                       5



the RBH NOL is used up but only so long as RBH remains part of the RHC Group for
federal  income  tax  purposes.  When RBH ceases to be part of the RHC Group for
federal  income tax purposes it shall have no further  right of any kind against
RHC as to any unused  portion of the RBH NOL.

     4.   CHANGES IN TAX  LIABILITY FOR A TAXABLE YEAR.

         (a) If any RHC Group consolidated federal income tax for a taxable year
is changed or otherwise adjusted  (including,  without limitation,  by reason of
(i) a  "determination"  within the meaning of Section  1313(a) of the Code, (ii)
the RHC Group's filing an amended federal income tax return, or (iii) any of the
events specified in Section 6213(b) or (d) of the Code),  then the amount of the
payments  required from RBH to RHC under  paragraphs 3(a) and (c), or RHC to RBH
under  paragraph  3(c), as the case may be, shall be recomputed by  substituting
the  Separate Tax  Liability of RBH, or the loss,  deduction or credit of RBH as
computed  after giving effect to the changes or adjustments  described  above in
place of the Separate Tax Liability of RBH, or the loss,  deduction or credit of
RBH as previously computed hereunder. No later than (i) five (5) days before the
due date for any additional  payment of Tax by the RHC Group, (ii) five (5) days
after the  receipt of a refund by the RHC Group or (iii) five (5) days after the
determination  becomes final,  the amended return is filed or other event giving
rise to the recomputation (if such determination,  amended return or other event
does not result in any additional tax due or the receipt of a refund), RBH shall
pay to RHC or RHC shall pay to RBH, as the case may be,  without  interest,  the
difference  between (x) the amounts as recomputed by  substituting  the Separate
Tax  Liability  of RBH, or the loss,  deduction  or credit or RBH as  determined
after giving effect to the change or adjustment,  and (y) the amounts previously
paid

                                       6


hereunder. The parties recognize that such recomputation for a taxable year does
not necessarily  reflect the final Tax liability for such year, and, hence,  the
amount of payments due  hereunder may be recomputed  under this  paragraph  more
than once.

         (b)  Payments  made  pursuant  to  subparagaph  (a)  shall  include  an
allocable  portion of any  interest  paid or  credited by the  Internal  Revenue
Service (net of tax; provided,  such interest shall not be treated as an item of
income of RBH). RHC, in its sole  discretion,  shall determine the amount of any
allocable  portion of interest under this  subparagraph  4(b).

     5.   ALLOCATION OF STATE AND LOCAL INCOME TAX LIABILITY

         For  purposes  of state and local  consolidated,  combined  and unitary
income Taxes (if any),  principles  analogous to those in Sections 3, 4, 5, 6, 7
and 8 shall be used to determine the  liability  therefor and the payments to be
made. All Nevada or Colorado gaming, business, employee, license and other taxes
incurred by RHC or RBH,  respectively,  that are not  described in the preceding
sentence  shall be solely the  responsibility  of RHC or RBH,  respectively.

     6.   EARNINGS AND PROFITS.

         Any election  under  Section 1552 of the Code of a method of allocating
the tax liability of the RHC Group for purposes of determining  the earnings and
profits of the  members  of the RHC Group,  including,  but not  limited  to, an
election of a method prescribed in Treasury Regulation Section 1.1502-33 (or any
successor provision,  including Proposed Regulation Section  1.1502-33(d)),  and
including, but not limited to, a decision not to elect any such method, shall be
made by RHC in its sole  discretion,  and RBH agrees to take whatever action may
be necessary to effect any such election.

     7.   TERMINATION OF AFFILIATION

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         (a) The parties  recognize that at some future date RBH may cease to be
included in the RHC Group  ("Deconsolidation")  but continue to be a corporation
subject to federal  income tax  ("Former  Member").  In such event,  RHC and RBH
shall consult and shall furnish each other with information  required to prepare
accurately (i) the  consolidated  federal income tax return of the RHC Group for
the last taxable  year in which RBH was included in the RHC Group,  and (ii) the
federal  income tax  returns for all taxable  years  thereafter  of RBH and RHC,
respectively,  in which the tax  liability  of either may be  affected  by their
former   affiliation   (including,   for  example,   the  apportionment  of  any
consolidated  net  operating  loss or capital loss or  investment or foreign tax
credit to RBH),  and (iii) any other  consolidated  federal income tax return of
the RHC Group for a taxable  year in which RBH was  included  in the RHC  Group,
including  information  necessary  to make the  final  determination  of any tax
liability  payable with respect to such return to the extent such  determination
is based on the  operations  of RBH.

         (b) In connection with any audit by any taxing authority for any period
ending on or prior to the date on which RBH is no  longer  included  with RHC in
filing a consolidated  federal income tax return (the  "Deconsolidation  Date"),
RBH  will  make  available  to RHC  and its  representatives  such  records  and
documents in their  possession  as may be requested by such taxing  authority or
reasonably  requested by RHC to defend  against  such audit.  RBH will cause its
employees to (i) cooperate with and assist such taxing authority as requested by
such taxing  authority  in the  completion  of such audit  (except as  otherwise
instructed by RHC within the bounds of applicable  law), and (ii) cooperate with
an assist ax personnel and tax counsel of RHC, as may be reasonably requested by
RHC in the conduct of all tax audits of tax returns,  and also

                                       8


with respect to a claim for refund or amended return for any period ending on or
prior to the  Deconsolidation  Date to the  extent  that such  audit,  claim for
refund or amended return,  may involve the operations of the RBH. RHC shall have
the  sole  right  to  represent  the  interests  of  RBH  in any  tax  audit  or
administrative  or court proceeding  relating to taxable periods of which end on
or before the  Deconsolidation  Date,  including  the sole right to enter into a
settlement  of such audit or  proceeding  on behalf of RBH. RBH shall forward to
RHC any notice it receives of any tax audit for any taxable  period ending on or
prior to the  Deconsolidation  Date.

         (c) RHC,  upon  request,  will  furnish  RBH a  complete  and  accurate
statement  of the  information  which  pertains to RBH and which  relates to any
consolidated  federal income tax return filed by the RHC Group for a period,  or
portion of any period, in which RBH was included in the RHC Group presented in a
pro forma separate return format.

         (d) RBH agrees that it will elect or exercise any option then available
to it under the Code (or any analogous or similar,  state, local or foreign law)
to forego the  carryback of any net operating  loss,  net capital loss, or other
tax benefit arising in a taxable year beginning on or after the  Deconsolidation
Date  to  a  taxable   year  of  the  RHC  Group  ending  on  or  prior  to  the
Deconsolidation  Date.  If the Code  requires such item first to be carried back
(and such item  cannot,  by the making of an election or  otherwise,  be carried
forward without first being carried back), then RBH may file an application with
the  appropriate  taxing  authority for a carryback  adjustment or the tax for a
taxable  year in which RBH was  included  in the RHC  Group  and a  consolidated
federal income tax return was filed and shall be entitled to that portion of the
actual  refund that is  attributable  to the RBH under the  consolidated  return
regulations;  provided,  that RBH shall not be  entitled  to all or a portion of
such  refund to the extent the items  giving  rise to

                                       9



such carryback have been previously utilized to reduce Separate Tax Liability or
RBH or  previously  give rise to a  payment  to RBH under  this  Agreement.

         (e) Payments that would have been required  under this  Agreement to or
by RBH were RBH still a member of the RHC  Group,  and with  respect  to taxable
years for which RBH was a member of the RHC Group,  shall be made in  accordance
with principles  analogous to those set forth in the above  paragraph(s) of this
Agreement and at the time(s) set forth therein.

         (f)  Whether  in  contemplation  of or  pending  a  deconsolidation  or
otherwise,  RHC shall have the  following  unilateral  rights:

               (i) to  determine  whether and when to report a  worthless  stock
          deduction under Section 165(g) of the Code;

               (ii) to determine the allocation of any consolidated Code Section
          382 limitation of the RHC Group;

               (iii) to file all consolidated federal income tax returns (and to
          amend such  returns) and to compute the tax due with  respect  thereto
          (including,  without  limitation,  determining  the  deductibility  of
          interest during any taxable period for purpose of this Agreement), and
          to control,  in its sole discretion,  all tax audits and controversies
          affecting the RHC Group;

               (iv) to  determine  whether to elect  under  Treasury  Regulation
          Section 1.1502-20(g) to reattribute the losses of RBH to RHC; and

               (v) to determine whether a bad debt deduction may be claimed with
          respect to any liability of RBH to RHC.

                                       10


     8.   RESOLUTION  OF DISPUTES.

         Any  disputes  between  or  among  the  parties  with  respect  to this
Agreement shall be resolved by a nationally recognized public accounting firm or
a nationally  recognized law firm,  which  accounting  firm or law firm shall be
reasonably  satisfactory to the disputing  parties,  and whose fees and expenses
shall be shared equally by the disputing parties.  Such  determination  shall be
binding and  conclusive on the  disputing  parties for the purposes  hereof.

     9.   TERM.

         This  Agreement  shall  be  deemed  to be in  effect  from  the date of
incorporation of RBH, and shall remain in effect indefinitely.

     10.  MISCELLANEOUS.

         (a) The  Agreement  constitutes  the entire  agreement  of the  parties
concerning  the  subject  matter  hereof and  supersedes  all other  agreements,
whether or not written, in respect of any tax between or among RHC and RBH. This
Agreement  may not be amended  except by an  agreement n writing,  signed by the
parties thereto.

         (b)  This  Agreement  has  been  made  in and  shall  be  construed  in
accordance  with the laws of the State of Nevada.

         (c) This  Agreement  shall be binding  upon and inure to the benefit of
each party thereto and its respective successors and assigns.

         (d) All notices and other communications  hereunder shall be in writing
and shall be delivered by hand or mailed by registered or certified mail (return
receipt requested) to the parties at the following addresses and shall be deemed
given on the date on which such notice is received:

                                       11


               If to RHC:

               Riviera Hotel & Casino
               2901 South Las Vegas Boulevard
               Las Vegas, Nevada  89109

               If to RBH:

               Riviera Black Hawk, Inc.
               444 Main Street
               Black Hawk, Colorado  80422

         (e)  This  Agreement  may be  executed  simultaneously  in two or  more
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same  instrument.

         (f) The headings of the  paragraphs of this  Agreement are inserted for
convenience  only and shall not  constitute  a part  hereof.

         (g) If any  term or  provision  of this  Agreement  or the  application
thereof to any person or circumstance shall be invalid or unenforceable,  to any
extent,  the remainder of this  Agreement,  or the  application  of such term or
provision  to persons or  circumstances  other than those as to which it is held
invalid  or  unenforceable,  shall not be  effected  thereby,  and each term and
provision of this Agreement shall be valid and be enforced to the fullest extent
permitted by law.

         (h) RBH will continue to make the payments to RHC under the  Agreement,
despite the occurrence and continuation of any Default or Event of Default under
the  Indenture,  dated  as of June  3,  1999,  between  RBH as  Issuer,  and IBJ
Whitehall Bank & Trust Company, as Trustee, pursuant to which $45 million Senior
Notes due 2006 were issued. The payments due

                                       12


from RBH to RHC are not subordinate to the amounts payable on the Notes or under
the Indenture.

                                       13


         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                                   RIVIERA HOLDINGS CORPORATION


                                   By:
                                        ----------------------------------------
                                   Its:
                                        ----------------------------------------



                                   RIVIERA BLACK HAWK, INC.


                                   By:
                                        ----------------------------------------
                                   Its:
                                        ----------------------------------------