Document:

<PAGE>
                                                                   EXHIBIT 10.13

                           LOAN MODIFICATION AGREEMENT

THIS LOAN MODIFICATION AGREEMENT ("MODIFICATION AGREEMENT") is entered into this
29th day of August, 2003, by and between: FIRST NATIONAL BANK ("LENDER");
CONCORDE CRIPPLE CREEK, INC., a Colorado corporation ("BORROWER"); and BRUSTUEN
H. LIEN, DEANNA B. LIEN, AND CONCORDE GAMING CORPORATION, a Colorado corporation
(each a "GUARANTOR" and collectively "GUARANTORS") (Concorde Gaming Corporation
also referred to as "SUBORDINATED CREDITOR").

                                    RECITALS

1.       On or about July 31, 2002, Lender, Borrower and Guarantors entered into
the following agreements:

(a)      Loan Agreement, a copy of which is attached hereto as Exhibit A;

(b)      Promissory Note, a copy of which is attached hereto as Exhibit B;

(c)      Deed of Trust, Assignment of Leases and Rents, Security Agreement and
         Fixture Filing (also entered into by the Public Trustee of Gilpin
         County [the "TRUSTEE"]); a copy of which is attached hereto as Exhibit
         C;

(d)      Guaranty of Brustuen H. Lien and Deanna B. Lien, a copy of which is
         attached hereto as Exhibit D;

(e)      Guaranty of Concorde Gaming Corporation, a copy of which is attached
         hereto as Exhibit E;

(f)      Subordination Agreement, a copy of which is attached hereto as
         Exhibit F.

In addition to the foregoing, Borrowers and Guarantors executed other documents
in connection with the foregoing, including, without limitation, Closing
Certificate of Borrower, Closing Certificate of Concorde Gaming Corporation,
Certificate of No Hazardous Waste, Internal Preauthorized Transfer Agreement. In
addition to and in connection with the foregoing, Morrison & Foerster LLP, as
counsel for Borrower, issued an opinion of Borrower's counsel opining as to the
matters specified in Paragraph 5.01(k) of the Loan Agreement.

All of the foregoing documents, together with all ancillary documents executed
in connection therewith, will be referred to collectively herein as the "LOAN
DOCUMENTS." The indebtedness and obligations created and memorialized by the
Loan Documents will be referred to herein as the "LOAN."

2.       As of the date of this Modification Agreement, amounts owing on the
Loan (assuming the payment due on September 1, 2003 is timely made) are:

(a)      Principal in the amount of $7,341,500.42; and

(b)      Accrued and unpaid interest of $43,743.10 (as of August 31, 2003);

(c)      Total $7,385,243.52

<PAGE>

The total set forth above will be referred to herein as the "CURRENT BALANCE."
Borrower's obligation to pay the Current Balance, together with all the other
covenants and obligations of Borrower and/or Guarantors under the Note, the
Security Agreement, and other Loan Documents, is hereby referred to collectively
herein as the "OBLIGATIONS."

3.       The original purpose of the Loan was to provide funds for use by
Borrower in constructing certain improvements on and to the Premises. However,
since the date of the loan, Borrower has learned that, due to additional
requirements imposed by the City of Black Hawk, the cost to complete the
construction contemplated in the Loan Agreement exceeded the amount originally
budgeted by Borrower. Therefore, Borrower has requested Lender to advance
additional funds to Borrower to enable completion of the construction.

4.       Currently, Lender is holding $460,947.48 in the Property Improvement
Reserve Account. Borrower has estimated that the total amount necessary to
complete construction is $1,294,445.00. Therefore, to complete the construction,
Borrower has requested Lender to advance an additional $800,000, with Borrower
to contribute an additional $33,497.52 plus any additional amounts and overruns
incurred.

6.       Lender has agreed to advance such additional on the terms and
conditions set forth below.

                                    AGREEMENT

In consideration of the mutual covenants set forth herein, and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged by the parties, the parties agree as follows:

1.       INCORPORATION OF RECITALS.  The Recitals set forth herein are
incorporated by reference and the parties represent and warrant that such
Recitals are true and correct.

2.       ACKNOWLEDGMENT OF DEBT. Borrower and Guarantors hereby acknowledge
that: (i) the Note and Loan Documents inure to the benefit of Lender as the
holder of the Note; (ii) Borrower is indebted to the Lender in the amount of the
Current Balance; and (iii) the Obligations of Borrower and Guarantors under the
Note and Loan Documents are valid, binding and fully enforceable against
Borrower and Guarantors in accordance with their respective terms, without
defense, offset or counterclaim.

3.       MODIFICATIONS OF LOAN DOCUMENTS.

a.       The amount of the Loan as set forth in Paragraph 2.01(a) of the Loan
         Agreement is increased to $8,141,500.42.

b.       Upon the closing of this Modification, Lender will advance the sum of
         $800,000 into the Property Improvement Reserve Account. Advances from
         the Property Improvement Reserve Account will be made pursuant to the
         Loan Agreement and the other Loan Documents. The Maturity Date and the
         Amortization Period will remain as set forth in the Loan Agreement and
         Promissory Note. Thus, Borrower acknowledges that the amount of its
         monthly payments will increase as a result of the Advances made in
         accordance with this Modification Agreement.

<PAGE>

4.       CONDITIONS TO MODIFICATION.  Lender's assent to the terms of this
Modification Agreement is subject to the following conditions:

a.       Issuance by Title Company at closing of a lender's policy of title
         insurance, in the full amount of the Loan as set forth above, insuring
         that he Premises are marketable, insuring fee simple title to the
         Premises vested in Borrower, free and clear from exceptions (other than
         this Loan) except as approved by Lender in writing, naming Lender as an
         insured, and inuring that the Deed of Trust is a valid first lien in
         the full amount of the Loan, and otherwise acceptable to Lender in its
         sole and absolute discretion;

b.       The written opinion of counsel for Borrower as to the items set forth
         in Paragraph 5.01(k) of the Loan Agreement;

c.       Duly executed resolutions of Borrower and Concorde Gaming Corporation
         assenting to the terms and conditions of this Modification Agreement;

d.       A certification by Borrower that the representations and warranties
         contained in the Loan Agreement continue to be true; and

e.       An updated UCC search showing that Lender's UCC financing statement
         continues to be in first position.

5.       LIMITED MODIFICATION.  Except as modified herein, the Loan Agreement,
Security Agreement and other Loan Documents remain in full force and effect
according to their terms and conditions.

6.       REAFFIRMATION AND CONSENT BY BORROWER.  Borrower hereby: (a) consents
to the terms and execution of this Modification Agreement, and (b) reaffirms the
obligations of Borrower, to Lender under to the terms of the Loan Documents, as
amended or modified herein.

7.       REAFFIRMATION AND CONSENT BY GUARANTOR.  Each Guarantor hereby: (a)
consents to the terms and execution of this Modification Agreement, and (b)
reaffirms the obligations of each Guarantor, respectively, to Lender under to
the terms of the Guaranty and other Loan Documents, as amended or modified
herein.

8.       REAFFIRMATION OF SUBORDINATION AGREEMENT.  Subordinated Creditor
hereby: (a) consents to the terms and execution of this Modification Agreement,
and (b) reaffirms the obligations of Subordinated Creditor to Lender under to
the terms of the Subordination Agreement and other Loan Documents, as amended or
modified herein.

9.       COSTS. Borrower shall reimburse Lender for all costs and attorneys'
fees incurred by Lender in connection with the preparation of this Modification
Agreement, the recordation and/or filing of the Amendment to Deed of Trust, the
issuance of the updated Title Policy, and all other items necessary for the
completion of the transactions contemplated by this Modification Agreement.

10.      MISCELLANEOUS

a.       The new address for notice to borrower's counsel is:

         Craig A. Kepler
         Mackall, Crounse & Moore, PLC
         1400 AT&T Tower

<PAGE>

         901 Marquette Ave.
         Minneapolis, MN  55402
         (612) 305-1400 (Phone)
         (612) 305-1414 (Fax)
         cak@mcmlaw.com (e-mail)

b.       Unless otherwise defined herein, all capitalized terms herein bear the
         definition assigned in the Loan Agreement or, if not defined therein,
         the other Loan Documents.

c.       This Modification Agreement represents the only agreement among the
         parties, other than the Loan Documents, concerning the subject matter
         hereof, and supersedes all prior agreements, whether oral or written,
         relating thereto. No purported amendment, modification, or waiver of
         any provision hereof shall be binding unless set forth in a written
         document signed by all parties (in the case of amendments or
         modifications) or by the party to be charged thereby (in the case of
         waivers). Any waiver shall be limited to the provisions thereof and the
         circumstance or advance made specifically made subject thereto and
         shall not be deemed a waiver of any other term hereof or of the same
         circumstance or event upon any reoccurrence thereof.

d.       This Modification Agreement and relations between the parties hereunder
         shall be governed by and construed and enforced in accordance with the
         laws of the State of Colorado.

e.       This Modification Agreement shall be binding upon Borrower, its heirs,
         personal representatives, successors, assigns, employees and other
         representatives. This Modification Agreement shall continue in full
         force and effect unless until terminated by written agreement of all
         parties hereto. Nothing in this Modification Agreement, express or
         implied, is intended to confer on any person other than the parties to
         this Modification Agreement or their respective heirs, representatives,
         successors, or assigns any rights, remedies, obligations, or
         liabilities under or by reason of this Modification Agreement.

f.       In the event any provision of this Modification Agreement is held
         invalid by a court of competent jurisdiction, the remaining provisions
         shall nonetheless be enforceable according to their terms. Any
         provision held overbroad as written shall be deemed amended to narrow
         its application to the extent necessary to make the provision
         enforceable under applicable law, and enforced as amended. This
         Modification Agreement shall be construed without regard to any
         presumption or other rule requiring construction hereof against the
         party causing this Modification Agreement to be drafted.

g.       This Modification Agreement may be executed in counterparts and by
         different parties on different counterparts with the same effect as if
         signatures thereto were on the same instrument. This Modification
         Agreement shall be effective and binding upon all parties hereto at
         such time as all of the parties have executed one or more counterparts
         of this Modification Agreement.

h.       The undersigned, by their execution hereof, state that this document
         has been read by them, it has been executed by them after conferring
         with legal counsel or after having a full opportunity to do so, and
         that the undersigned understand and fully agree to each, all and every
         provision hereof, and hereby acknowledge a receipt of a copy hereof.

i.       EACH OF THE UNDERSIGNED AND LENDER (BY ACCEPTANCE HEREOF), TO THE
         FULLEST EXTENT PERMITTED BY APPLICABLE LAW, HEREBY KNOWINGLY,
         VOLUNTARILY, AND INTENTIONALLY WAIVES ANY RIGHT TO A TRIAL BY JURY

<PAGE>

         IN RESPECT OF ANY LITIGATION BASED ON THIS MODIFICATION AGREEMENT, THE
         LOAN, OR ANY OTHER LOAN DOCUMENT, OR ANY OTHER DOCUMENT EXECUTED IN
         CONNECTION WITH THIS NOTE, OR ARISING OUT OF, UNDER, OR IN CONNECTION
         THEREWITH, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS
         (WHETHER ORAL OR WRITTEN), OR ACTIONS OF ANY PARTY. THIS PROVISION IS A
         MATERIAL INDUCEMENT FOR LENDER TO ENTER INTO THE TRANSACTIONS EVIDENCED
         HEREBY.

                            [SIGNATURES ON NEXT PAGE]

<PAGE>

IN WITNESS WHEREOF, the parties have executed this Modification Agreement as of
the day and year first above written.

LENDER:                                     BORROWER:
First National Bank                         Concorde Cripple Creek, Inc.

By: /s/ Todd Christoffer                    By: /s/ Jerry L. Baum
    -------------------------                   --------------------------------
    Todd Christoffer                            Jerry L. Baum
    Its: Branch President                       Its: President

GUARANTORS:                                 GUARANTOR AND SUBORDINATED CREDITOR:
                                            Concorde Gaming Corporation

/s/ Brustuen H. Lien                        By: /s/ Jerry L. Baum
-----------------------------                   --------------------------------
BRUSTUEN H. LIEN                                Jerry L. Baum
                                                Its: President
/s/ Deanna B. Lien
-----------------------------
DEANNA B. LIEN<PAGE>
                                                                   EXHIBIT 10.16

                           AMENDMENT TO DEED OF TRUST
                         ASSIGNMENT OF LEASES AND RENTS,
                      SECURITY AGREEMENT AND FIXTURE FILING
                               DATED JULY 31, 2002

                  This Amendment is Dated as of August 29, 2003

             in the amount of $800,000 which, when combined with the
              original amount secured by the Deed of Trust amended
           hereby, results in a total amount secured of $8,142,000.00

                       among CONCORDE CRIPPLE CREEK, INC.,
                   a Colorado corporation (the "Grantor") and

                       THE PUBLIC TRUSTEE OF GILPIN COUNTY
                               (the "Trustee") and

                 FIRST NATIONAL BANK, RAPID CITY, SOUTH DAKOTA,
                 as the Lender herein named (the "Beneficiary")

                              LOCATION OF PREMISES:

                               Blackhawk, Colorado

          Recording requested by and after recording, please return to:

                            Mackall, Crounse & Moore
                              Attn: Craig A. Kepler
                                 1400 AT&T Tower
                              901 Marquette Avenue
                          Minneapolis, Minnesota 55402

This instrument was prepared by the above-named attorney.

<PAGE>

              AMENDMENT TO DEED OF TRUST, ASSIGNMENT OF LEASES AND
                  RENTS, SECURITY AGREEMENT AND FIXTURE FILING

         THE MAXIMUM AMOUNT SECURED BY THE DEED OF TRUST AS AMENDED HEREBY IS
         $8,142,00.00, TOGETHER WITH INTEREST THEREON AND OTHER AMOUNTS HEREIN
         DESCRIBED. INTEREST ON THE AMOUNT SECURED HEREBY MAY FLUCTUATE FROM
         TIME TO TIME.

THIS AMENDMENT TO DEED OF TRUST, ASSIGNMENT OF LEASES AND RENTS, SECURITY
AGREEMENT AND FIXTURE FILING ("AMENDMENT") is entered into this 29th day of
August, 2003, by and between: FIRST NATIONAL BANK, having its offices at 909 St.
Joseph Street, Rapid City, South Dakota, 57701 ("LENDER"); CONCORDE CRIPPLE
CREEK, INC., a Colorado corporation, having its office at 3290 Lien Street,
Rapid City, South Dakota, Nevada 57702, ("GRANTOR" OR "BORROWER"); and the
PUBLIC TRUSTEE OF GILPIN COUNTY (the "TRUSTEE").

                                    RECITALS

On or about July 31, 2002, Lender and Borrower, as well as certain named
Guarantors and, as to the Deed of Trust, Trustee, entered into the following
agreements:

(a)      Loan Agreement;

(b)      Promissory Note;

(c)      Deed of Trust, Assignment of Leases and Rents, Security Agreement and
         Fixture Filing (also entered into by the Public Trustee of Gilpin
         County [the "TRUSTEE"]), which was recorded in the official records of
         the County of Gilpin, Colorado, on August 2, 2002, in Book 766, Page
         233 (the "DEED OF TRUST"), affecting the property described in Exhibit
         A hereto;

(d)      Other documents in connection with the foregoing, including, without
         limitation, certain Guaranties, a Subordination Agreement, and other
         related documents, all of which, together with the foregoing, will
         collectively be referred to herein as the "LOAN DOCUMENTS." The
         indebtedness and obligations created and memorialized by the Loan
         Documents will be referred to herein as the "LOAN."

The original purpose of the Loan was to provide funds for use by Borrower in
constructing certain improvements on and to the Premises. However, Borrower has
requested Lender to advance additional funds to Borrower to enable completion of
the construction. Lender has agreed to advance such additional funds, in
consideration for which the parties hereto have agreed to this Amendment to
amend the Deed of Trust to reflect the increased Maximum Amount secured thereby,
in connection with which Borrower and Lender have executed a Loan Modification
Agreement (the "MODIFICATION AGREEMENT") of even date herewith. The Modification
Agreement, among other things, increases the principal balance of the Loan and
the

                                       2
<PAGE>

Note as set forth above, and the term "OBLIGATIONS" is hereby modified to refer
to such increased principal amount.

                                    AGREEMENT

In consideration of the mutual covenants set forth herein, and other good and
valuable consideration, the receipt and sufficiency of which is hereby
acknowledged by the parties, the Deed of Trust is hereby amended, as set forth
below. Other than as specifically modified herein, all terms and conditions of
the Deed of Trust remain in full force and effect.

                                ARTICLE 1. GRANT

                     [THERE IS NO AMENDMENT TO THIS ARTICLE]

                         ARTICLE 2. OBLIGATIONS SECURED

The following portions of Article 2 of the Deed of Trust are hereby Amended to
state as follows:

     2.1  OBLIGATIONS SECURED. Grantor makes this Deed of Trust for the purpose
of securing the following obligations (collectively, the "Obligations"):

          (a) Payment when due, whether at stated maturity, by required
     prepayment, declaration, acceleration, demand or otherwise (including
     payment of amounts that would become due but for the operation of the
     automatic stay under Section 362 (a) of the Bankruptcy Code, 11 U.S.C.
     Section 362(a)), of. (i) the principal sum which is, at any time, advanced
     and unpaid under the Loan (as defined in the Loan Agreement), not to exceed
     Eight Million One Hundred Forty Two Thousand and No/100 Dollars
     ($8,142,000.00) at any one time; (ii) interest and other charges accrued on
     said principal sum, or accrued on interest and other charges then
     outstanding under the Loan (all including, without limitation, interest and
     other charges that would accrue on such obligations, but for the filing of
     a petition in bankruptcy with respect to Grantor); and (iii) any other
     obligations of Grantor under the Note referred to below; all according to
     the terms of that certain Promissory Note dated concurrently herewith made
     by Grantor and payable to the order of First National Bank, Rapid City,
     South Dakota (herein referred to as either the "Lender" or the
     "Beneficiary"), according to the terms and provisions of said Note, and all
     renewals, extensions, amendments, restatements, replacements, substitutions
     and other modifications thereof (hereinafter collectively referred to as
     the "Note").

All other portions of Article 2 of the Deed of Trust remain in force as stated
in the Deed of Trust.

                  ARTICLE 3. ASSIGNMENT OF LEASE AND PAYMENTS

                     [THERE IS NO AMENDMENT TO THIS ARTICLE]

                ARTICLE 4. SECURITY AGREEMENT AND FIXTURE FILING

The following portions of Article 4 of the Deed of Trust are hereby Amended to
state as follows:

                                       3
<PAGE>

     4.2  FIXTURE FILING.

               As to all of the above described Personal Property which is or
          which hereafter becomes a "fixture" under applicable law, this Deed of
          Trust constitutes a fixture filing under Section 4-9-502 of the
          Colorado UCC, as it may be amended or recodified from time to time.
          The address of Beneficiary from which information may be obtained
          concerning the security interest granted hereunder and the mailing
          address of Grantor are as follows:

          Beneficiary:    First National Bank, Rapid City, South Dakota
                          as the Lender herein named
                          909 St. Joseph Street
                          Rapid City, South Dakota 57701
                          Attention: Todd Christoffer, Branch President

          Grantor:        Concorde Cripple Creek, Inc.
                          3290 Lien Street
                          Rapid City, South Dakota 57702
                          Attention: Jerry Baum, President

                          Tax ID No.  91-1771693

All other portions of Article 4 of the Deed of Trust remain in force as stated
in the Deed of Trust.

          ARTICLE 5. PROTECTION OF SECURITY OF DEED OF TRUST; RELEASE

                     [THERE IS NO AMENDMENT TO THIS ARTICLE]

                  ARTICLE 6. RIGHTS AND DUTIES OF THE PARTIES

The following portions of Article 6 of the Deed of Trust are hereby Amended to
state as follows:

     6.1  CERTAIN REPRESENTATIONS AND WARRANTIES OF GRANTOR. Grantor represents,
warrants and covenants that:

          (a) This Deed of Trust, as amended hereby, continues to create a first
     priority mortgage lien and/or, to the extent applicable, a first priority
     security interest on the Real Property and all of the Property which is in
     addition to the Real Property, subject only to Permitted Encumbrances (as
     defined in the Loan Agreement).

     6.2  PAYMENT OF OBLIGATIONS. Grantor shall pay when due, or cause to be
paid when due: (i) the principal of, and interest on, the indebtedness evidenced
by the Note as increased by the Modification Agreement; (ii) all charges, fees
and other sums as provided in the Loan Documents (as defined in the Loan
Agreement) including, without limitation, all increases by virtue of the
Modification Agreement, all reasonable costs, fees and expenses of this Deed of
Trust incurred by Beneficiary in connection with any Default; (iii) the
principal of, and interest on, any future advances secured by this Deed of
Trust; and (iv) the principal of, and interest on, any other indebtedness
secured by this Deed of Trust.

                                       4
<PAGE>

All other portions of Article 6 of the Deed of Trust remain in force as stated
in the Deed of Trust.

                         ARTICLE 7. DEFAULT PROVISIONS

                     [THERE IS NO AMENDMENT TO THIS ARTICLE]

                      ARTICLE 8. MISCELLANEOUS PROVISIONS

                     [THERE IS NO AMENDMENT TO THIS ARTICLE]

IMPORTANT: READ BEFORE SIGNING. THE TERMS OF THIS MODIFICATION AGREEMENT SHOULD
BE READ CAREFULLY BECAUSE ONLY THOSE TERMS IN WRITING ARE ENFORCEABLE. NO OTHER
TERMS OR ORAL PROMISES NOT CONTAINED IN THIS WRITTEN CONTRACT CAN BE LEGALLY
ENFORCED. YOU MAY CHANGE THE TERMS OF THIS AGREEMENT ONLY BY ANOTHER WRITTEN
AGREEMENT.

IN WITNESS WHEREOF, Grantor has executed this Deed of Trust as of the day and
year set forth above.

                                          GRANTOR

                                          CONCORDE CRIPPLE CREEK, INC.,
                                          a Colorado corporation

                                          By: /s/ Jerry L. Baum
                                              ----------------------------------
                                          Name: Jerry Baum
                                          Its:  President

                                       5
<PAGE>

                                    EXHIBIT A

                                LEGAL DESCRIPTION

Parcel A:

Parcel W - 11,
Golden Gates Minor Subdivision,
as shown on Plat recorded October 11, 2000, in Book 70.4, Page 182, County of
Gilpin, State of Colorado.

Parcel B:

Unit 2,
Ultimate Parking Garage, a Condominium,
According to the Condominium Declaration recorded June 12, 2002, in Book 760,
Page 21, Reception No. 112969, in the records of the Clerk and Recorder of the
County of Gilpin, State of Colorado, and according to the Condominium Map
recorded June 12, 2002, in Book 760, Page 85, Reception No. 112970, in the
records of the Clerk and Recorder of the County of Gilpin, State of Colorado,
County of Gilpin, State of Colorado.

Parcel C:

Unit 3,
Ultimate Parking Garage, a Condominium,
According to the Condominium Declaration recorded June 12, 2002, in Book 760,
Page 21, Reception No. 112969, in the records of the Clerk and Recorder of the
County of Gilpin, State of Colorado, and according to the Condominium Map
recorded June 12, 2002, in Book 760, Page 85, Reception No. 112970, in the
records of the Clerk and Recorder of the County of Gilpin, State of Colorado,
County of Gilpin, State of Colorado.

                                       A-1

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