<PAGE>

                                                                    Exhibit 10.2

________________________________________________________________________________


________________________________________________________________________________
       ________________________________________________________________

                                LOAN AGREEMENT,

                          dated as of April 3, 2000,

                                     among

                            OGLEBAY NORTON COMPANY,

                                 as Borrower,

                         KEYBANK NATIONAL ASSOCIATION,

                                   as Agent,

                              BANK ONE, MICHIGAN,

                             as Syndication Agent,

                                      and

                           THE BANK OF NOVA SCOTIA,

                            as Documentation Agent
       _________________________________________________________________

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
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<S>                                                                                                  <C>
ARTICLE I.    DEFINITIONS............................................................................   1

ARTICLE II.   AMOUNT AND TERMS OF LOAN...............................................................  18
   SECTION 2.1   AMOUNT AND NATURE OF LOAN...........................................................  18
   SECTION 2.2   CONDITIONS TO LOANS.................................................................  19
   SECTION 2.3   PAYMENT ON NOTES, ETC...............................................................  20
   SECTION 2.4   PREPAYMENT..........................................................................  20
   SECTION 2.5   COMPUTATION OF INTEREST AND FEES;...................................................  20
   SECTION 2.6   PARTIAL RELEASE OF MORTGAGED........................................................  20
   SECTION 2.7   FIXED CHARGE COVERAGE RATIO CONDITION...............................................  21

ARTICLE III.  ADDITIONAL PROVISIONS RELATING TO LIBOR INTEREST SEGMENTS; INCREASED CAPITAL; TAXES....  22
   SECTION 3.1   RESERVES OR DEPOSIT REQUIREMENTS, ETC...............................................  22
   SECTION 3.2   TAX LAW, ETC........................................................................  23
   SECTION 3.3   EURODOLLAR DEPOSITS UNAVAILABLE OR..................................................
   SECTION 3.4   INDEMNITY...........................................................................  24
   SECTION 3.5   CHANGES IN LAW RENDERING LIBOR INTEREST
   SECTION 3.6   FUNDING.............................................................................  25
   SECTION 3.7   CAPITAL ADEQUACY....................................................................  25

ARTICLE IV.   CONDITIONS PRECEDENT...................................................................  25
   SECTION 4.1   NOTES...............................................................................  25
   SECTION 4.2   GUARANTIES OF PAYMENT OF DEBT.......................................................  25
   SECTION 4.3   INTERCREDITOR AGREEMENT.............................................................  26
   SECTION 4.4   OFFICER'S CERTIFICATE, RESOLUTIONS,.................................................  26
   SECTION 4.5   LEGAL OPINION.......................................................................  26
   SECTION 4.6   GOOD STANDING CERTIFICATES..........................................................  26
   SECTION 4.7   CLOSING AND LEGAL FEES; AGENT FEE LETTER............................................  26
   SECTION 4.8   SECURITY DOCUMENTS..................................................................  26
   SECTION 4.9   MORTGAGES...........................................................................  26
   SECTION 4.10  LIEN SEARCHES.......................................................................  26
   SECTION 4.11  INDENTURE...........................................................................  27
</TABLE>

                                       i
<PAGE>

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<S>                                                                                                  <C>
   SECTION 4.12  INSURANCE CERTIFICATES............................................................    27
   SECTION 4.13  CREDIT AGREEMENT..................................................................    27
   SECTION 4.14  NO MATERIAL ADVERSE CHANGE........................................................    27
   SECTION 4.15  MISCELLANEOUS.....................................................................    27

ARTICLE V. COVENANTS...............................................................................    28
   SECTION 5.1   INSURANCE.........................................................................    28
   SECTION 5.2   MONEY OBLIGATIONS.................................................................    28
   SECTION 5.3   FINANCIAL STATEMENTS..............................................................    28
   SECTION 5.4   FINANCIAL RECORDS.................................................................    30
   SECTION 5.5   FRANCHISES........................................................................    30
   SECTION 5.6   ERISA COMPLIANCE..................................................................    30
   SECTION 5.7   FINANCIAL COVENANTS...............................................................    30
   SECTION 5.8   BORROWING.........................................................................    31
   SECTION 5.9   LIENS.............................................................................    32
   SECTION 5.10  REGULATIONS U and X...............................................................    33
   SECTION 5.11  INVESTMENTS AND LOANS.............................................................    33
   SECTION 5.12  MERGER AND SALE OF ASSETS.........................................................    34
   SECTION 5.13  ACQUISITIONS......................................................................    34
   SECTION 5.14  NOTICE............................................................................    35
   SECTION 5.15  ENVIRONMENTAL COMPLIANCE..........................................................    35
   SECTION 5.16  AFFILIATE TRANSACTIONS............................................................    36
   SECTION 5.17  USE OF PROCEEDS...................................................................    36
   SECTION 5.18  CAPITAL EXPENDITURES..............................................................    36
   SECTION 5.19  CORPORATE NAMES...................................................................    36
   SECTION 5.20  CAPITAL DISTRIBUTIONS.............................................................    36
   SECTION 5.21  RESTRICTED PAYMENTS...............................................................    37
   SECTION 5.22  SUBSIDIARIES CREATED, ACQUIRED....................................................    37
   SECTION 5.23  PROPERTY ACQUIRED OR HELD SUBSEQUENT..............................................    37
   SECTION 5.24  OTHER COVENANTS...................................................................    38
   SECTION 5.25  GUARANTY OF SUBORDINATED INDEBTEDNESS.............................................    38
   SECTION 5.26  POST CLOSING MORTGAGED REAL PROPERTY..............................................    38
   SECTION 5.27  INTEREST RATE PROTECTION..........................................................    39

ARTICLE VI.   REPRESENTATIONS AND WARRANTIES.......................................................    39
   SECTION 6.1   CORPORATE EXISTENCE; FOREIGN......................................................    40
   SECTION 6.2   CORPORATE AUTHORITY...............................................................    40
   SECTION 6.3   COMPLIANCE WITH LAWS..............................................................    40
</TABLE>

                                      ii
<PAGE>

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<S>                                                                                                  <C>
   SECTION 6.4   LITIGATION AND ADMINISTRATIVE PROCEEDINGS.........................................    40
   SECTION 6.5   LOCATION..........................................................................    41
   SECTION 6.6   DOCUMENTED VESSELS................................................................    41
   SECTION 6.7   TITLE TO ASSETS...................................................................    41
   SECTION 6.8   LIENS AND SECURITY INTERESTS......................................................    41
   SECTION 6.9   TAX RETURNS.......................................................................    41
   SECTION 6.10  ENVIRONMENTAL LAWS................................................................    41
   SECTION 6.11  CONTINUED BUSINESS................................................................    42
   SECTION 6.12  EMPLOYEE BENEFITS PLANS...........................................................    42
   SECTION 6.13  CONSENTS OR APPROVALS.............................................................    43
   SECTION 6.14  SOLVENCY..........................................................................    43
   SECTION 6.15  FINANCIAL STATEMENTS..............................................................    43
   SECTION 6.16  REGULATIONS.......................................................................    43
   SECTION 6.17  MATERIAL AGREEMENTS...............................................................    44
   SECTION 6.18  INTELLECTUAL PROPERTY.............................................................    44
   SECTION 6.19  INSURANCE.........................................................................    44
   SECTION 6.20  ACCURATE AND COMPLETE STATEMENTS..................................................    44
   SECTION 6.21  REAL PROPERTY.....................................................................    44
   SECTION 6.22  INDENTURE.........................................................................    45
   SECTION 6.23  DEFAULTS..........................................................................    45

ARTICLE VII.  EVENTS OF DEFAULT....................................................................    45
   SECTION 7.1   PAYMENTS..........................................................................    45
   SECTION 7.2   SPECIAL COVENANTS.................................................................    45
   SECTION 7.3   OTHER COVENANTS...................................................................    45
   SECTION 7.4   REPRESENTATIONS AND WARRANTIES....................................................    46
   SECTION 7.5   CROSS DEFAULT.....................................................................    46
   SECTION 7.6   ERISA DEFAULT.....................................................................    46
   SECTION 7.7   CHANGE IN CONTROL.................................................................    46
   SECTION 7.8   MONEY JUDGMENT....................................................................    46
   SECTION 7.9   MATERIAL ADVERSE CHANGE...........................................................    46
   SECTION 7.10  VALIDITY OF LOAN DOCUMENTS........................................................    46
   SECTION 7.11  SOLVENCY..........................................................................    47
   SECTION 7.12  INDENTURE.........................................................................    47
   SECTION 7.13  CREDIT AGREEMENT..................................................................    47

ARTICLE VIII. REMEDIES UPON DEFAULT................................................................    47
   SECTION 8.1   OPTIONAL DEFAULTS.................................................................    48
   SECTION 8.2   AUTOMATIC DEFAULTS................................................................    48
   SECTION 8.3   OFFSETS...........................................................................    48
   SECTION 8.4   EQUALIZATION PROVISION............................................................    48
</TABLE>

                                      iii
<PAGE>

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<S>                                                                                                  <C>
ARTICLE IX.   THE AGENT............................................................................    49
   SECTION 9.1   APPOINTMENT AND AUTHORIZATION.....................................................    49
   SECTION 9.2   NOTE HOLDERS......................................................................    49
   SECTION 9.3   CONSULTATION WITH COUNSEL.........................................................    49
   SECTION 9.4   DOCUMENTS.........................................................................    49
   SECTION 9.5   AGENT AND AFFILIATES..............................................................    49
   SECTION 9.6   KNOWLEDGE OF DEFAULT..............................................................    49
   SECTION 9.7   ACTION BY AGENT...................................................................    50
   SECTION 9.8   NOTICES, DEFAULT, ETC.............................................................    50
   SECTION 9.9   INDEMNIFICATION OF AGENT..........................................................    50
   SECTION 9.10  SUCCESSOR AGENT...................................................................    50

ARTICLE X.    MISCELLANEOUS........................................................................    51
   SECTION 10.1  BANKS' INDEPENDENT INVESTIGATION..................................................    51
   SECTION 10.2  NO WAIVER; CUMULATIVE REMEDIES....................................................    51
   SECTION 10.3  AMENDMENTS, CONSENTS..............................................................    51
   SECTION 10.4  NOTICES...........................................................................    52
   SECTION 10.5  COSTS, EXPENSES AND TAXES.........................................................    52
   SECTION 10.6  INDEMNIFICATION...................................................................    53
   SECTION 10.7  OBLIGATIONS SEVERAL; NO FIDUCIARY OBLIGATIONS.....................................    53
   SECTION 10.8  EXECUTION IN COUNTERPARTS.........................................................    53
   SECTION 10.9  BINDING EFFECT; BORROWER'S ASSIGNMENT.............................................    53
   SECTION 10.10 BANK ASSIGNMENTS/PARTICIPATIONS...................................................    53
      A  Assignments of Term Loan Commitments......................................................    53
      B  Sale of Participations....................................................................    55
   SECTION 10.11 SEVERABILITY OF PROVISIONS; CAPTIONS; ATTACHMENTS.................................    56
   SECTION 10.12 INVESTMENT PURPOSE................................................................    56
   SECTION 10.13 ENTIRE AGREEMENT..................................................................    56
   SECTION 10.14 GOVERNING LAW; SUBMISSION TO JURISDICTION.........................................    57
   SECTION 10.15 LEGAL REPRESENTATION OF PARTIES...................................................    57
   SECTION 10.16 JURY TRIAL WAIVER.................................................................    58

   SCHEDULES:
   ---------
   SCHEDULE 1     BANKS AND TERM LOAN COMMITMENTS..................................................    61
   SCHEDULE 2     MORTGAGED REAL PROPERTY..........................................................    62
   SCHEDULE 3     PLEDGORS.........................................................................    63
   SCHEDULE 6.6   DOCUMENTED VESSELS...............................................................    65
</TABLE>

                                      iv
<PAGE>

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   <S>                                                                                               <C>
   EXHIBITS:
   --------
   EXHIBIT A  TERM NOTE............................................................................  66
   EXHIBIT B  NOTICE OF INTEREST RATE SELECTION....................................................  68
   EXHIBIT C  COMPLIANCE CERTIFICATE...............................................................  70
   EXHIBIT D  FORM OF ASSIGNMENT  AND ACCEPTANCE AGREEMENT.........................................  71
   EXHIBIT E  INDENTURE TRUSTEE'S CERTIFICATE......................................................  77
   EXHIBIT F  FORM OF GUARANTY OF PAYMENT..........................................................  78
   EXHIBIT G  FORM OF SECURITY AGREEMENT...........................................................  86
   EXHIBIT H  FORM OF COLLATERAL ASSIGNMENT AND SECURITY AGREEMENT................................. 100
   EXHIBIT I  FORM OF PLEDGE AGREEMENT............................................................. 111
   EXHIBIT J  INTERCREDITOR AGREEMENT.............................................................. 122
</TABLE>

   SCHEDULES:
   ---------
   SCHEDULE 5.8  PERMITTED INDEBTEDNESS
   SCHEDULE 5.9  PERMITTED LIENS
   SCHEDULE 6.1  CORPORATE INFORMATION; SUBSIDIARIES
   SCHEDULE 6.3  MATERIAL PERMITS
   SCHEDULE 6.4  LITIGATION
   SCHEDULE 6.5  LOCATIONS
   SCHEDULE 6.6  DOCUMENTED VESSELS
   SCHEDULE 6.17 MATERIAL AGREEMENTS
   SCHEDULE 6.18 INTELLECTUAL PROPERTY
   SCHEDULE 6.19 INSURANCE

                                       v
<PAGE>

     This LOAN AGREEMENT, dated as of April 3, 2000 (as the same may from time
to time be amended, restated or otherwise modified, this "Agreement"), is made
among OGLEBAY NORTON COMPANY, a Delaware corporation, 1100 Superior Avenue,
Cleveland, Ohio 44114 ("Borrower"), the banking institutions named in Schedule 1
                                                                      ----------
hereto (collectively, "Banks", and individually, "Bank"), KEYBANK NATIONAL
ASSOCIATION, 127 Public Square, Cleveland, Ohio 44114-1306, as administrative
agent for the Banks under this Agreement ("Agent"), BANK ONE, MICHIGAN, 611
Woodward Avenue, Detroit, Michigan, 48226, as syndication agent ("Syndication
Agent"), and THE BANK OF NOVA SCOTIA, Suite 2700, 600 Peachtree Street NE,
Atlanta, Georgia 30308, as documentation agent ("Documentation Agent").  As used
in this Agreement, the term "Agent" shall not include Documentation Agent or
Syndication Agent.


                                  WITNESSETH:

     WHEREAS, Borrower, Agent and the Banks desire to contract for the
establishment of credits in the aggregate principal amounts hereinafter set
forth, to be made available to Borrower upon the terms and subject to the
conditions hereinafter set forth;

     NOW, THEREFORE, it is mutually agreed as follows:


                           ARTICLE I.   DEFINITIONS

     As used in this Agreement, the following terms shall have the following
meanings:

     "Acquisition" shall mean any transaction or series of related transactions
for the purpose of or resulting, directly or indirectly, in (a) the acquisition
of all or substantially all of the assets of any Person, or any business or
division of any Person, (b) the acquisition of in excess of fifty percent (50%)
of the stock (or other equity interest) of any Person, or (c) the acquisition of
another Person (other than a Company) by a merger or consolidation or any other
combination with such Person.

     "Adjusted Prime Rate" shall mean a rate per annum equal to the greater of
(a) the Prime Rate or (b) one-half of one percent ( 1/2%) in excess of the
Federal Funds Effective Rate. Any change in the Adjusted Prime Rate shall be
effective immediately from and after such change in the Adjusted Prime Rate.

     "Advantage" shall mean any payment (whether made voluntarily or
involuntarily, by offset of any deposit or other indebtedness or otherwise)
received by any Bank in respect of the Debt, if such payment results in that
Bank having less than its pro rata share of the Debt then outstanding, than was
the case immediately before such payment.
<PAGE>

     "Affiliate" shall mean any Person, directly or indirectly, controlling,
controlled by or under common control with a Company and "control" (including
the correlative meanings, the terms "controlling", "controlled by" and "under
common control with") shall mean the possession, directly or indirectly, of the
power to direct or cause the direction of the management and policies of a
Company, whether through the ownership of voting securities, by contract or
otherwise.

     "Agent Fee Letter" shall mean the Agent Fee Letter from Agent to Borrower,
dated as of the Closing Date.

     "Applicable Margin" shall mean:

     (a)  for the period from the Closing Date through May 31, 2000, (i) two
hundred (200) basis points for each LIBOR Interest Segment, and (ii) zero (0)
basis points for the Prime Interest Segment, and

     (b)  commencing with the financial statements for the fiscal quarter ending
March 31, 2000, the number of basis points (for each LIBOR Interest Segment or
the Prime Interest Segment, as appropriate) set forth in the following matrix,
based upon the result of the computation of the Leverage Ratio, shall be used to
establish the number of basis points that will go into effect on June 1, 2000
and thereafter:

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------
                                              Applicable Margin        Applicable Margin
Leverage Ratio                                 for each LIBOR           for the Prime
                                              Interest Segment          Interest Segment
-------------------------------------------------------------------------------------------------
<S>                                         <C>                      <C>
Greater than or equal to 4.25 to 1.00       250 basis points             25 basis points
-------------------------------------------------------------------------------------------------
Greater than or equal to 4.00 to 1.00 but   225 basis points             0 basis points
less than 4.25 to 1.00
-------------------------------------------------------------------------------------------------
Greater than or equal to 3.75 to 1.00 but   200 basis points             0 basis points
less than 4.00 to 1.00
-------------------------------------------------------------------------------------------------
Greater than or equal to 3.50 to 1.00 but   175 basis points             0 basis points
less than 3.75 to 1.00
-------------------------------------------------------------------------------------------------
Less than 3.50 to 1.00                      150 basis points             0 basis points
-------------------------------------------------------------------------------------------------
</TABLE>

Changes to the Applicable Margin shall be effective on the first day of the
month following the date upon which Agent received, or, if earlier, Agent should
have received, pursuant to Section 5.3 (a) or (b) hereof, the financial
statements of the Companies. The above matrix does not modify or waive, in any
respect, the requirements of Section 5.7 hereof, the rights of the Banks to
charge the Default Rate, or the rights and remedies of Agent and the Banks
pursuant to Articles VII and VIII hereof.
<PAGE>

     "Assignment Agreement" shall mean an Assignment and Acceptance Agreement in
the form of Exhibit D hereto.
            ---------

     "Bank Fee Letter" shall mean the Bank Fee Letter from Borrower to the
Banks, dated as of the Closing Date.

     "Business Day" shall mean a day of the year on which banks are not required
or authorized to close in Cleveland, Ohio, and, if the applicable Business Day
relates to any LIBOR Interest Segment, on which dealings are carried on in the
London interbank eurodollar market.

     "Capital Distribution" shall mean a payment made, liability incurred or
other consideration given for the purchase, acquisition, redemption or
retirement of any capital stock or other equity interest of any Company or as a
dividend, return of capital or other distribution (other than any stock
dividend, stock split or other equity distribution payable only in capital stock
or other equity of the Company in question) in respect of any Company's capital
stock or other equity interest.

     "Change in Control" shall mean (a) the acquisition of, or, if earlier, the
shareholder or director approval of the acquisition of, ownership or voting
control, directly or indirectly, beneficially or of record, on or after the
Closing Date, by any Person or group (within the meaning of Rule 13d-3 of the
SEC under the Securities Exchange Act of 1934, as then in effect), of shares
representing more than fifty-percent (50%) of the aggregate ordinary Voting
Power represented by the issued and outstanding capital stock of Borrower; or
(b) the occupation of a majority of the seats (other than vacant seats) on the
board of directors of Borrower by Persons who were neither (i) nominated by the
board of directors of Borrower nor (ii) appointed by directors so nominated.

     "Closing Date" shall mean April 3, 2000.

     "Code" shall mean the Internal Revenue Code of 1986, as amended, together
with the rules and regulations promulgated thereunder.

     "Collateral Agent" shall mean KeyBank National Association (and its
successors and assigns) in its capacity as collateral agent under the
Intercreditor Agreement.

     "Collateral Assignment and Security Agreement" shall mean a Collateral
Assignment and Security Agreement, in the form of the attached Exhibit H,
                                                               ---------
executed and delivered on or after the Closing Date by a Pledgor, wherein such
Pledgor has granted to Agent, for the benefit of the Banks, a security interest
in and an assignment of all intellectual property owned by such Pledgor, as the
same may from time to time be amended, restated or otherwise modified.

     "Company" shall mean Borrower or a Subsidiary.

                                       3
<PAGE>

     "Companies" shall mean Borrower and all Subsidiaries.

     "Compliance Certificate" shall mean a certificate, substantially in the
form of the attached Exhibit C.
                     ---------

     "Consideration" shall mean, in connection with an Acquisition, the
aggregate consideration paid, including borrowed funds, cash, the issuance of
securities or notes, the assumption or incurring of liabilities (direct or
contingent to the extent any such contingent obligation is considered to be a
liability in accordance with GAAP), the payment of consulting fees or fees for a
covenant not to compete and any other consideration paid for the purchase.

     "Consolidated" shall mean the resultant consolidation of the financial
statements of Borrower and its Subsidiaries in accordance with GAAP, including
principles of consolidation consistent with those applied in preparation of the
consolidated financial statements referred to in Section 6.15 hereof.

     "Consolidated Capital Expenditures" shall mean, for any period, the amount
of capital expenditures of Borrower, as determined on a Consolidated basis and
in accordance with GAAP.

     "Consolidated Depreciation and Amortization Charges" shall mean, for any
period, on a Consolidated basis and in accordance with GAAP, the Depreciation
and Amortization Charges of Borrower for such period.

     "Consolidated EBITDA" shall mean, for any period, on a Consolidated basis
and in accordance with GAAP, Consolidated Net Earnings for such period plus the
aggregate amounts deducted in determining such Consolidated Net Earnings in
respect of (a) income taxes, (b) Consolidated Interest Expense, and (c)
Consolidated Depreciation and Amortization Charges.

     "Consolidated Fixed Charges" shall mean, for any period, on a Consolidated
basis and in accordance with GAAP, the aggregate of (a) cash interest expense
(including, without limitation, the "imputed interest" portion of capital
leases), (b) actual cash expenditures for taxes, (c) cash principal payments on
long-term Funded Indebtedness maturing within twelve (12) months of the date in
question, and (d) actual cash expenditures relating to Capital Distributions.

     "Consolidated Interest Expense" shall mean, for any period, the interest
expense of Borrower for such period, as determined on a Consolidated basis and
in accordance with GAAP.

     "Consolidated Net Earnings" shall mean, for any period, the Net Earnings of
Borrower for such period, as determined on a Consolidated basis and in
accordance with GAAP.

     "Consolidated Net Worth" shall mean, at any date, the stockholders' equity
of Borrower, determined as of such date on a Consolidated basis and in
accordance with GAAP.

                                       4
<PAGE>

     "Consolidated Pro-Forma Capital Expenditures" shall mean the sum of (a)
Consolidated Capital Expenditures, plus (b)(i) without duplication, the amount
of capital expenditures of Companies acquired by Borrower and its Subsidiaries
during the most recently completed four (4) fiscal quarters to the extent that
such capital expenditures of Companies acquired are confirmed by audited
financial or other information satisfactory to Agent, minus (ii) capital
expenditures of Companies disposed of by Borrower and its Subsidiaries during
the most recently completed four (4) fiscal quarters.

     "Consolidated Pro-Forma Cash Flow" shall mean, for any period, (a)
Consolidated Pro-Forma EBITDA, minus (b) Consolidated Pro-Forma Capital
Expenditures, as determined in accordance with GAAP.

     "Consolidated Pro-Forma EBITDA" shall mean the sum of (a) Consolidated
EBITDA, plus (b)(i) without duplication, the EBITDA of Companies acquired by
Borrower and its Subsidiaries during the most recently completed four (4) fiscal
quarters to the extent that such EBITDA of Companies acquired is confirmed by
audited financial or other information satisfactory to Agent, minus (ii) EBITDA
of Companies disposed of by Borrower and its Subsidiaries during the most
recently completed four (4) fiscal quarters.

     "Consolidated Pro-Forma Fixed Charges" shall mean the sum of (a)
Consolidated Fixed Charges, plus (b)(i) without duplication, the amount of Fixed
Charges of Companies acquired by Borrower and its Subsidiaries during the most
recently completed four (4) fiscal quarters to the extent that the Fixed Charges
of Companies acquired are confirmed by audited financial or other information
satisfactory to Agent, minus (ii) Fixed Charges of Companies disposed of by
Borrower and its Subsidiaries during the most recently completed four (4) fiscal
quarters.

     "Consolidated Pro-Forma Interest Expense" shall mean the sum of (a)
Consolidated Interest Expense, plus (b)(i) without duplication, the interest
expense of Companies acquired by Borrower and its Subsidiaries during the most
recently completed four (4) fiscal quarters to the extent that such interest
expense of Companies acquired is confirmed by audited financial or other
information satisfactory to Agent, minus (ii) interest expense of Companies
disposed of by Borrower and its Subsidiaries during the most recently completed
four (4) fiscal quarters.

     "Consolidated Pro-Forma Net Earnings" shall mean the sum of (a)
Consolidated Net Earnings, plus (b)(i) without duplication, the Net Earnings of
Companies acquired by Borrower and its Subsidiaries during the most recently
completed four (4) fiscal quarters to the extent that such Net Earnings of such
Companies acquired is confirmed by audited financial or other information
satisfactory to Agent, minus (ii) Net Earnings of Companies disposed of by
Borrower and its Subsidiaries during the most recently completed four (4) fiscal
quarters.

     "Consolidated Pro-Forma Pre-Tax Earnings" shall mean, for any period,
(a)(i) Consolidated Net Earnings, plus (ii) Consolidated income taxes; plus
(b)(i) without duplication, the following number as calculated for all Companies
acquired by Borrower and its Subsidiaries during the most recently completed
four (4) fiscal quarters to the extent that such number for

                                       5
<PAGE>

such Companies acquired is confirmed by audited financial or other information
satisfactory to Agent: (A) Net Earnings, minus (B) any nonrecurring non-cash
gains or losses, plus (C) income taxes; minus (ii) the following number as
calculated for all Companies disposed of by Borrower and its Subsidiaries during
the most recently completed four (4) fiscal quarters: (A) Net Earnings, minus
(B) any nonrecurring non-cash gains or losses, plus (C) income taxes; all as
determined in accordance with GAAP.

     "Controlled Group" shall mean a Company and each Person required to be
aggregated with a Company under Code Sections 414(b), (c), (m) or (o).

     "Credit Agreement" shall mean the Credit Agreement, dated as of May 15,
1998, as amended and restated as of April 3, 2000, among Borrower, Credit
Agreement Agent and the Credit Agreement Banks, as the same may from time to
time be further amended, restated or otherwise modified.

     "Credit Agreement Agent" shall mean KeyBank National Association (and its
successors and assigns) in its capacity as administrative agent under the Credit
Agreement.

     "Credit Agreement Banks" shall mean the Banks, as defined in the Credit
Agreement, and each thereof.

     "Debt" shall mean, collectively, (a) all Indebtedness incurred by Borrower
to Agent or the Banks pursuant to this Agreement and includes the principal of
and interest on all Notes; (b) each extension, renewal or refinancing thereof in
whole or in part; (c) any fees, including any prepayment fee, payable hereunder;
and (d) all Related Expenses.

     "Default Rate" shall mean a rate per annum equal to two percent (2%) in
excess of the Prime Rate from time to time in effect.

     "Depreciation and Amortization Charges" shall mean, for any period, in
accordance with GAAP, the aggregate of all such charges for fixed assets,
leasehold improvements, mining reserves and general intangibles (specifically
including goodwill) of a Person for such period.

     "Derived LIBOR Rate" shall mean a rate per annum equal to the sum of the
Applicable Margin (from time to time in effect) plus the LIBOR Rate.

     "Derived Prime Rate" shall mean a rate per annum equal to the sum of the
Applicable Margin (from time to time in effect) plus the Adjusted Prime Rate.

     "Documented Vessel" shall mean any one of the ships owned by a Company as
set forth on Schedule 6.6 hereto.
             ------------

     "Domestic Subsidiary" shall mean a Subsidiary that is not a Foreign
Subsidiary.

                                       6
<PAGE>

     "EBITDA" shall mean, for any period,  in accordance with GAAP, Net Earnings
for such period, plus the aggregate amounts deducted in determining such Net
Earnings in respect of (a) income taxes, (b) interest expense, and (c)
Depreciation and Amortization Charges.

     "Environmental Laws" shall mean all provisions of law, statutes,
ordinances, rules, regulations, policies, permits, licenses, judgments, writs,
injunctions, decrees, orders, awards and standards promulgated by the government
of the United States or, if applicable, Canada, or by any state, province,
territory or municipality thereof or by any court, agency, instrumentality,
regulatory authority or commission of any of the foregoing concerning air
quality, soil quality, water quality, wetlands, solid waste or the protection of
public health, human health, safety or the environment or the Release of any
Hazardous Substance into the environment.

     "ERISA" shall mean the Employee Retirement Income Security Act of 1974, as
amended from time to time, and the regulations promulgated pursuant thereto.

     "ERISA Event" shall mean (a) the existence of any condition or event with
respect to a Plan that presents a risk of the imposition of an excise tax or any
other liability on a Company or of the imposition of a Lien on the assets of a
Company; (b) a Controlled Group member has engaged in a non-exempt "prohibited
transaction" (as defined under ERISA Section 406 or Code Section 4975) or a
breach of a fiduciary duty under ERISA that could result in liability to a
Company; (c) a Controlled Group member has applied for a waiver from the minimum
funding requirements of Code Section 412 or ERISA Section 302 or a Controlled
Group member is required to provide security under Code Section 401(a)(29) or
ERISA Section 307; (d) a Reportable Event has occurred with respect to any
Pension Plan as to which notice is required to be provided to the PBGC; (e) a
Controlled Group member has withdrawn from a Multiemployer Plan in a "complete
withdrawal" or a "partial withdrawal" (as such terms are defined in ERISA
Sections 4203 and 4205, respectively); (f) a Multiemployer Plan is in or is
likely to be in reorganization under ERISA Section 4241; (g) a Plan (and any
related trust) that is intended to be qualified under Code Sections 401 and 501
fails to be so qualified or any "cash or deferred arrangement" under any such
Plan fails to meet the requirements of Code Section 401(k); (h) the PBGC takes
any steps to terminate a Pension Plan or appoint a trustee to administer a
Pension Plan, or a Controlled Group member takes steps to terminate a Pension
Plan; (i) a Controlled Group member or a Plan fails to satisfy any requirements
of law applicable to a Plan; (j) a claim, action, suit, audit or investigation
is pending or threatened with respect to a Plan, other than a routine claim for
benefits; or (k) a Controlled Group member incurs or is expected to incur any
liability for post-retirement benefits under any Welfare Plan, other than as
required by ERISA Section 601, et. seq. or Code Section 4980B.
                               --- ----

     "Eurocurrency Reserve Percentage" shall mean, for any Interest Period in
respect of any LIBOR Interest Segment, as of any date of determination, the
aggregate of the then stated maximum reserve percentages (including any
marginal, special, emergency or supplemental reserves), expressed as a decimal,
applicable to such Interest Period (if more than one such percentage is
applicable, the daily average of such percentages for those days in such
Interest Period during which any such percentage shall be so applicable) by the
Board of Governors of the Federal Reserve System, any successor thereto, or any
other banking authority, domestic or

                                       7
<PAGE>

foreign, to which a Bank may be subject in respect to eurocurrency funding
(currently referred to as "Eurocurrency Liabilities" in Regulation D of the
Federal Reserve Board) or in respect of any other category of liabilities
including deposits by reference to which the LIBOR Rate with respect to any
LIBOR Interest Segment is determined or any category of extension of credit or
other assets that include any such LIBOR Interest Segment. For purposes hereof,
such reserve requirements shall include, without limitation, those imposed under
Regulation D of the Federal Reserve Board and the amount of each LIBOR Interest
Segment shall be deemed to constitute Eurocurrency Liabilities subject to such
reserve requirements without benefit of credits for proration, exceptions or
offsets that may be available from time to time to any Bank under said
Regulation D.

     "Event of Default"  shall mean an event or condition that constitutes an
event of default as defined in Article VII hereof.

     "Federal Funds Effective Rate" shall mean, for any day, the rate per annum
(rounded upward to the nearest one one-hundredth of one percent (1/100 of 1%))
announced by the Federal Reserve Bank of New York (or any successor) on such day
as being the weighted average of the rates on overnight federal funds
transactions arranged by federal funds brokers on the previous trading day, as
computed and announced by such Federal Reserve Bank (or any successor) in
substantially the same manner as such Federal Reserve Bank computes and
announces the weighted average it refers to as the "Federal Funds Effective
Rate" as of the Closing Date.

     "Financial Officer" shall mean any of the following officers: chief
executive officer, president, chief financial officer, treasurer or vice
president of finance.

     "Fixed Charges" shall mean, for any period, in accordance with GAAP, the
aggregate of (a) cash interest expense (including, without limitation, the
"imputed interest" portion of capital leases), (b) actual cash expenditures for
taxes, (c) cash principal payments on long-term funded indebtedness maturing
within twelve (12) months of the date in question, and (d) actual cash
expenditures relating to Capital Distributions.

     "Fixed Charge Coverage Ratio Condition" shall mean any time that Borrower's
Consolidated Fixed Charge Coverage Ratio (as defined in the Indenture) is less
than 2.00 to 1.00, as calculated in accordance with the terms and conditions of
the Indenture.

     "Foreign Subsidiary" shall mean a Subsidiary that is organized outside of
the United States.

     "Funded Indebtedness"  shall mean Indebtedness for borrowed money and
capitalized leases, including, but not limited to, current, long-term and
Subordinated Indebtedness, if any; provided, however, that (a) reimbursement
obligations under letters of credit or banker's acceptances  up to an aggregate
amount of Three Million Dollars ($3,000,000), (b) Indebtedness

                                       8
<PAGE>

incurred in connection with any Hedge Agreement, and (c) synthetic leases shall
not be deemed to constitute Funded Indebtedness.

     "GAAP" shall mean generally accepted accounting principles as then in
effect, which shall include the official interpretations thereof by the
Financial Accounting Standards Board, applied on a basis consistent with the
past accounting practices and procedures of Borrower.

     "Guarantor" shall mean a Person that pledges its credit or property in any
manner for the payment or other performance of the indebtedness, contract or
other obligation of another and includes (without limitation) any guarantor
(whether of payment or of collection), surety, co-maker, endorser or Person that
agrees conditionally or otherwise to make any purchase, loan or investment in
order thereby to enable another to prevent or correct a default of any kind.

     "Guaranty of Payment" shall mean a Guaranty of Payment of Debt, in the form
of the attached Exhibit F, executed and delivered on or after the Closing Date
                ---------
by each Pledgor, as the same may from time to time be amended, restated or
otherwise modified.

     "Hazardous Substance" shall mean any hazardous, toxic or dangerous
pollutant, contaminant, substance or waste or any such pollutant, contaminant,
substance or waste that is defined or listed under any Environmental Law or that
is otherwise regulated or prohibited or subject to investigation or remediation
under any Environmental Law because of its hazardous, toxic, dangerous or
injurious properties, including, without limitation: (a) any "hazardous
substance" as defined under the Comprehensive Environmental Response,
Compensation, and Liability Act, 42 U.S.C. (S) 9601 et seq., as amended; (b) any
"hazardous waste" as now or hereafter defined under the Resource Conservation
and Recovery Act, 42 U.S.C. (S) 690l et seq., as amended; (c) hydrocarbons
and/or petroleum products or fractions thereof, natural gas, natural gas
liquids, liquefied natural gas and synthetic gas usable for fuel; (d) asbestos
containing material; (e) flammable explosives; (f) polychlorinated biphenyls;
(g) radioactive materials; and (h) any substance for which special handling or
notification is required for its collection, storage, treatment, use or
disposal.

     "Hedge Agreement" shall mean any currency swap or hedge agreement, interest
rate swap, cap, collar or floor agreement, or other interest rate management
device entered into by Borrower with any financial institution.

     "Indebtedness" shall mean, for any Company (excluding in all cases trade
payables and accrued expenses payable  in the ordinary course of business by
such Company), (a) all obligations to repay borrowed money, direct or indirect,
incurred, assumed, or guaranteed, (b) all obligations for the deferred purchase
price of capital assets, (c) all obligations under conditional sales or other
title retention agreements, (d) all obligations under any letter of credit or
banker's acceptance, (e) all obligations under any currency swap agreement,
interest rate swap, cap, collar or floor agreement or other interest rate
management device, (f) all synthetic leases, (g) all lease obligations that have
been or should be capitalized on the books of such Company in accordance with
GAAP, (h) all obligations of such Company with respect to asset securitization
financing programs to the extent that there is recourse against such Company or
such Company is liable

                                       9
<PAGE>

(contingent or otherwise) under any such program, (i) all obligations to advance
funds to, or to purchase assets, property or services from, any other Person in
order to maintain the financial condition of such Person, and (j) any other
transaction (including forward sale or purchase agreements) having the
commercial effect of a borrowing of money entered into by such Company to
finance its operations or capital requirements.

     "Indenture" shall mean the Indenture among Borrower, the guarantors a party
thereto, and Norwest Bank Minnesota, National Association, as trustee, dated as
of February 1, 1999, as amended and as the same may, with the prior written
consent of Agent and the Majority Banks, which consent shall not be unreasonably
withheld, from time to time be further amended, supplemented (other than to add
a guarantor thereunder), restated or otherwise modified or replaced.

     "Indenture Trustee" shall mean Norwest Bank Minnesota, National
Association, as trustee, under the Indenture, or any successor or replacement
trustee thereunder.

     "Indenture Trustee's Certificate" shall mean a certificate from the
Indenture Trustee substantially in the form of Exhibit E hereto.
                                               ---------

     "Intercreditor Agreement" shall mean the Collateral Agency and
Intercreditor Agreement, in the form of the attached Exhibit J, dated as of
                                                     ---------
April 3, 2000, among Agent, on behalf of the Banks, Credit Agreement Agent, on
behalf of the Credit Agreement Banks, and Collateral Agent, as the same may from
time to time be amended, restated or otherwise modified or replaced.

     "Interest Adjustment Date" shall mean the last day of each Interest Period.

     "Interest Period" shall mean, with respect to any LIBOR Interest Segment,
the period commencing on the date such LIBOR Interest Segment began to bear
interest at a LIBOR Rate Option and ending on the last day of such period, as
selected by Borrower pursuant to the provisions hereof, and, thereafter, each
subsequent period commencing on the last day of the immediately preceding
Interest Period and ending on the last day of such period, as selected by
Borrower pursuant to the provisions hereof.  The duration of each Interest
Period for any LIBOR Loan shall be one (1) month, two (2) months, three (3)
months or six (6) months, in each case as Borrower may select, as set forth in
Section 2.2 hereof, provided that (a) if Borrower fails to so select the
duration of any Interest Period, Borrower shall be deemed to have made a Notice
of Interest Rate Selection of a Prime Rate Option with respect to such LIBOR
Segment at the end of the then current Interest Period; and (b) Borrower may not
select any Interest Period for a LIBOR Interest Segment that ends after any date
when principal is due on the Term Loan.

     "Interest Rate Protection" shall mean, with respect to Indebtedness of a
Company, that either (a) such Company has obtained a fixed rate of interest on
such Indebtedness, or (b) such Company has entered into a Hedge Agreement or
Hedge Agreements, upon terms and conditions satisfactory to Agent.

                                       10
<PAGE>

     "Level I Acquisition" shall mean, with respect to an Acquisition made by
any Company, that the aggregate Consideration paid in connection with such
Acquisition is less than or equal to Five Million Dollars ($5,000,000).

     "Level I Acquisition Limit" shall mean Twenty Million Dollars
($20,000,000).

     "Level II Acquisition" shall mean, with respect to an Acquisition by any
Company, that the aggregate Consideration paid in connection with such
Acquisition is greater than Five Million Dollars ($5,000,000).

     "Level II Acquisition Limit" shall mean Twenty-Five Million Dollars
($25,000,000).

     "Leverage Ratio" shall mean, at any time, the ratio for the Companies of
(a) Total Funded Indebtedness (based upon the financial statements of the
Companies for the most recently completed fiscal quarter) to (b) Consolidated
Pro-Forma EBITDA (based upon the financial statements of the Companies for the
most recently completed four (4) fiscal quarters).

     "LIBOR Breakage Fees" shall mean the fees set forth in the second paragraph
of Section 2.4 hereof.

     "LIBOR Interest Segment" shall mean each part of the outstanding principal
balance of the Term Loan, as selected by Borrower in accordance with the
provisions of Section 2.1 hereof, on which Borrower shall pay interest at a
LIBOR Rate Option.

     "LIBOR Rate" shall mean, for any Interest Period with respect to any LIBOR
Interest Segment, the quotient (rounded upwards, if necessary, to the nearest
one sixteenth of one percent (1/16th of 1%)) of (a) the per annum rate of
interest, determined by Agent in accordance with its usual procedures (which
determination shall be conclusive absent manifest error) as of approximately
11:00 A.M. (London time) two (2) Business Days prior to the beginning of such
Interest Period pertaining to such LIBOR Interest Segment, as provided by
Telerate Service, Bloomberg's or Reuters (or any other similar company or
service that provides rate quotations comparable to those currently provided by
such companies) as the rate in the London interbank market for dollar deposits
in immediately available funds with a maturity comparable to such Interest
Period, divided by (b) a number equal to 1.00 minus the Eurocurrency Reserve
        ----------                            -----
Percentage.  In the event that such rate quotation is not available for any
reason, then the rate (for purposes of clause (a) hereof) shall be the rate,
determined by Agent as of approximately 11:00 A.M. (London time) two (2)
Business Days prior to the beginning of such Interest Period pertaining to such
LIBOR Interest Segment, to be the average (rounded upwards, if necessary, to the
nearest one sixteenth of one percent (1/16th of 1%)) of the per annum rates at
which dollar deposits in immediately available funds in an amount comparable to
the principal amount of such LIBOR Interest Segment and with a duration
comparable to such Interest Period are offered to the prime banks by leading
banks in the London interbank market.  The LIBOR Rate shall be

                                       11
<PAGE>

adjusted automatically on and as of the effective date of any change in the
Eurocurrency Reserve Percentage.

     "LIBOR Rate Option" shall mean an interest rate determined with reference
to the LIBOR Rate.

     "Lien" shall mean any mortgage, security interest, lien, charge,
encumbrance on, pledge or deposit of, or conditional sale or other title
retention agreement with respect to any property (real or personal) or asset.

     "Loan" shall mean the Term Loan or any other loan granted to Borrower by
the Banks in accordance with this Agreement.

     "Loan Documents" shall mean this Agreement, each of the Notes, each of the
Guaranties of Payment, each Security Document, the Intercreditor Agreement, the
Agent Fee Letter, the Bank Fee Letter, and any other documents relating to any
of the foregoing, as any of the foregoing may from time to time be amended,
restated or otherwise modified or replaced.

     "Majority Banks" shall mean the holders of at least sixty-six and two-
thirds percent (66-2/3%) of the aggregate amount at the time outstanding under
the Notes.

     "Maturity Date" shall mean the earlier of (a) April 1, 2003, or (b) the
date upon which the Credit Agreement is terminated.

     "Moody's" shall mean Moody's Investors Service, Inc., or any successor to
such company.

     "Mortgage" shall mean a Mortgage, Deed of Trust or other instrument, in
form and substance reasonably satisfactory to Agent, executed by a Company on or
after the Closing Date, with respect to a Mortgaged Real Property, as the same
may from time to time be amended, restated or otherwise modified.

     "Mortgaged Real Property" shall mean each of the parcels of real property
as set forth on Schedule 2 hereto, or interests therein, owned or leased by a
                ----------
Pledgor, together with each other parcel of real property that shall become
subject to a Mortgage on or after the Closing Date, in each case together with
all of such Pledgor's right, title and interest in the improvements and
buildings thereon and all appurtenances, easements or other rights belonging
thereto.

     "Multiemployer Plan" shall mean a Pension Plan that is subject to the
requirements of Subtitle E of Title IV of ERISA.

     "NCB Ship Mortgage" shall mean the First Preferred Fleet Mortgage dated as
of July 14, 1997, executed by Original Borrower, as defined in the Credit
Agreement, in favor of National City Bank and assumed by Oglebay Norton Marine
Services Company, L.L.C., as amended and

                                       12
<PAGE>

as the same may from time to time be further amended, restated or otherwise
modified, with respect to the Wolverine and the David Z. Norton.

     "Net Earnings" shall mean, for any period, the net income (loss) for such
period, determined in accordance with GAAP.

     "Note" shall mean any Term Note or any other note delivered pursuant to
this Agreement.

     "Notice of Interest Rate Selection" shall mean a Notice of Interest Rate
Selection in the form of the attached Exhibit B.
                                      ---------

     "Obligor" shall mean (a) a Person whose credit or any of whose property is
pledged to the payment of the Debt and includes, without limitation, any
Guarantor, and (b) any signatory to a Related Writing.

     "PBGC" shall mean the Pension Benefit Guaranty Corporation, or its
successor.

     "Pension Plan" shall mean a Plan that is a "pension plan" (within the
meaning of ERISA Section 3(2)).

     "Permitted Acquisitions" shall mean, collectively, (a) [the acquisition by
Global Stone Port Inland, Inc. of all of the partnership interests of Michigan
Limestone, L.P., a Michigan limited partnership, (b) the acquisition of
substantially all of the assets of Pete Lien & Sons, Inc. by Oglebay Norton
Industrial Sands, Inc., and (c) the acquisition of substantially all of the
assets of Jebco Abrasives, Inc. by Oglebay Norton Industrial Sands, Inc.

     "Permitted Investment" shall mean any of the following:

          (a)  direct obligations of or obligations guaranteed by the United
     States or the Canadian government;

          (b)  obligations issued or guaranteed by an agency or instrumentality
     of the United States or obligations of the Federal National Mortgage
     Association, the Student Loan Marketing Association, the Federal home Loan
     Banks or the Federal Farm Credit Bank;

          (c)  bankers' acceptances drawn on and accepted by banks (which may
     include Agent or any Bank), and certificates of deposit or commercial paper
     of banks (which may include Agent or any Bank), with a combined capital and
     surplus aggregating at least One Hundred Million Dollars ($100,000,000)
     and, if such acceptances are drawn on, or such certificates of deposits or
     commercial paper are issued by any bank other than the Banks, the unsecured
     deposits or securities of such bank shall be, at the time of acquisition,
     rated within one (1) of the two (2) highest rating categories assigned by
     either Rating Agency;

                                       13
<PAGE>

          (d)  interest-bearing demand or time deposits or certificates of
     deposit of a bank (which may include Agent or any Bank) or trust company
     continuously secured and collateralized by obligations of the type
     described in subpart (a) hereof, or by obligations of the type described in
     subpart (k) hereof, having a market value determined not less than daily
     equal at all times to at least the amount of such deposit or certificate,
     to the extent such deposit or certificate is not insured by the Federal
     Deposit Insurance Corporation or any successor thereto;

          (e)  interest-bearing notes or commercial paper of any of the Banks,
     or interest-bearing notes or commercial paper rated within one of the three
     (3) highest rating categories assigned by either Rating Agency, issued by a
     bank or bank holding company which has a combined capital and surplus
     aggregating at least One Hundred Million Dollars ($100,000,000), or
     commercial paper rated within rating category A1+, A1, A2, P1 or P2, as
     assigned by the applicable Rating Agency, issued by any other entity;

          (f)  repurchase agreements and investment agreements issued by banks
     (which may include the Agent or any Bank) with a combined capital and
     surplus aggregating at least One Hundred Million Dollars ($100,000,000) or
     by any other entity whose debt or unsecured securities are, at the time of
     acquisition, rated within one (1) of the two (2) highest rating categories
     assigned by either Rating Agency, or continuously secured and
     collateralized by obligations referred to in subparts (a) through (e) above
     or (g) through (j) below having a market value, determined not less
     frequently than daily, at least equal at the time of each such
     determination to the principal balance collectible pursuant thereto plus
     accrued interest thereon;

          (g)  interest-bearing notes or investment agreements secured by a
     letter of credit issued by banks (which may include Agent or any Bank) with
     a combined capital and surplus aggregating at least One Hundred Million
     Dollars ($100,000,000), or by a surety issued by an insurance company, in
     each case (other than in the case of a letter of credit issued by a Bank)
     the unsecured securities or deposits of either of which are rated at the
     time of acquisition within one (1) of the two (2) highest rating categories
     assigned by either Rating Agency;

          (h)  securities with a remaining term of maturity of, or which are
     payable at par upon demand by the holder thereof within ninety (90) days or
     less, the interest on which is exempt from federal income taxation, rated
     by either Rating Agency in its highest note or commercial paper rating
     category;

          (i)  any other securities or obligations selected by Borrower and
     approved in writing by the Majority Banks;

          (j)  shares redeemable on demand at par of, or an investment agreement
     with, an Investment Company (as defined in the Investment Company Act of
     1940, as

                                       14
<PAGE>

     amended) which invests in, or collateralizes such investment agreement
     with, obligations of the type described as Permitted Investments in any
     other subpart of this definition; and

          (k)  tax-free money market funds that invest principally in
     obligations rated in the highest rating category whether rated as short-
     term or long-term obligations by a Rating Agency.

     "Person" shall mean any individual, sole proprietorship, partnership, joint
venture, unincorporated organization, corporation, limited liability company,
institution, trust, estate, government or other agency or political subdivision
thereof or any other entity.

     "Plan" shall mean an "employee benefit plan" (within the meaning of ERISA
Section 3(3)) that a Controlled Group member at any time sponsors, maintains,
contributes to, has liability with respect to or has an obligation to contribute
to such plan.

     "Pledge Agreement" shall mean a Pledge Agreement, in the form of the
attached Exhibit I, executed and delivered to Agent, for the benefit of the
         ---------
Banks, by Borrower or a Pledgor, as appropriate, on or after the Closing Date,
as the same may from time to time be amended, restated or otherwise modified.

     "Pledgor" shall mean each of the Companies set forth on Schedule 3 hereto
                                                             ----------
that have executed and delivered to Agent, for the benefit of the Banks, a (a)
Guaranty of Payment, (b) Security Agreement, (c) Collateral Assignment and
Security Agreement, if applicable, (d) Pledge Agreement, if applicable, (e)
Mortgage, if applicable, and (f) Preferred Ship Mortgage, if applicable; and any
other Person that shall execute and deliver any of the foregoing to Agent, for
the benefit of the Banks, subsequent to the Closing Date.

     "Preferred Ship Mortgage" shall mean a Preferred Ship Mortgage, in form and
substance satisfactory to Agent, executed by a Company on or after the Closing
Date with respect to a Documented Vessel, as the same may from time to time be
amended, restated or otherwise modified.

     "Prime Interest Segment" shall mean that portion of the outstanding
principal balance of the Term Loan, as selected by Borrower in accordance with
the provisions of Section 2.1 hereof, on which Borrower shall pay interest at a
Prime Rate Option.

     "Prime Rate" shall mean the interest rate established from time to time by
Agent as Agent's prime rate, whether or not such rate is publicly announced; the
Prime Rate may not be the lowest interest rate charged by Agent for commercial
or other extensions of credit. Each change in the Prime Rate shall be effective
immediately from and after such change.

     "Prime Rate Option" shall mean an interest rate determined with reference
to the Adjusted Prime Rate.

                                       15
<PAGE>

     "Rating Agency" means Moody's or Standard & Poor's or the successor of
either or, if both no longer exist and have no successors, then any other rating
agency approved by the Majority Banks.

     "Real Property" shall mean any one of the parcels of real property, or
interests therein, owned or leased by a Company (including, but not limited to,
the Mortgaged Real Property) together with all improvements and buildings
thereon and all appurtenances, easements or other rights belonging thereto.

     "Related Expenses" shall mean any and all costs, liabilities, and expenses
(including, without limitation, losses, damages, penalties, claims, actions,
reasonable attorneys' fees, legal expenses, judgments, suits, and disbursements)
incurred by, imposed upon, or asserted against, Agent, Collateral Agent or any
Bank in any attempt by Agent or Collateral Agent (a) to obtain, preserve,
perfect, or enforce any security interest evidenced by this Agreement or any
Related Writing;  (b) to obtain payment, performance, and observance of any and
all of the Debt; (c) to maintain, insure, audit, collect, preserve, repossess,
and dispose of any of the collateral securing the Debt or any thereof,
including, without limitation, costs and expenses for appraisals, assessments,
and audits of Borrower or any such collateral; or (d) incidental or related to
(a) through (c) above, including, without limitation, interest thereupon from
the date incurred, imposed, or asserted until paid at the Default Rate.

     "Related Writing" shall mean each Loan Document and any other assignment,
mortgage, security agreement, guaranty agreement, subordination agreement,
financial statement, audit report or other writing furnished by Borrower, any
Subsidiary or any Obligor, or any of their respective officers, to the Banks
pursuant to or otherwise in connection with this Agreement.

     "Release" shall mean any release, spill, emission, leaking, pumping,
pouring, emptying, disposing, injection, deposit, discharge, leaching, or
migration into any media, whether soil, surface water, ground water, building
interior or components, air or any combination of the foregoing, and the
movement of any contamination through any media, and including the abandonment
or discarding of barrels, containers and other closed receptacles containing any
Hazardous Substance.

     "Reportable Event" shall mean a reportable event as that term is defined in
Title IV of ERISA, except actions of general applicability by the Secretary of
Labor under Section 110 of such Act.

     "SEC" shall mean the United States Securities and Exchange Commission.

     "Security Agreement" shall mean a Security Agreement, in the form of the
attached Exhibit G, executed and delivered by a Company to Agent, for the
         ---------
benefit of the Banks, in connection with this Agreement, as the same may from
time to time be amended, restated or otherwise modified.

                                       16
<PAGE>

     "Security Documents" shall mean each of the Security Agreements, each of
the Pledge Agreements, each of the Mortgages, each of the Preferred Ship
Mortgages, each of the Collateral Assignment and Security Agreements, each
U.C.C. financing statement executed in connection herewith or securing any
interest created in any of the foregoing documents, and any other documents
relating to any of the foregoing, as any of the foregoing may from time to time
be amended, restated or otherwise modified or replaced.

     "Standard & Poor's" shall mean Standard & Poor's Ratings Group, a division
of McGraw-Hill, Inc., or any successor to such company.

     "Subordinated", as applied to Indebtedness, shall mean that the
Indebtedness has been subordinated (by written terms or written agreement being,
in either case, in form and substance reasonably satisfactory to Agent) in favor
of the prior payment in full of the Debt.

     "Subsidiary" of Borrower or any of its Subsidiaries shall mean (a) a
corporation more than fifty percent (50%) of the Voting Power of which is owned,
directly or indirectly, by Borrower or by one or more other subsidiaries of
Borrower or by Borrower and one or more subsidiaries of Borrower, (b) a
partnership or limited liability company of which Borrower, one or more other
subsidiaries of Borrower or Borrower and one or more subsidiaries of Borrower,
directly or indirectly, is a general partner or managing member, as the case may
be, or otherwise has the power to direct the policies, management and affairs
thereof, or (c) any other Person (other than a corporation) in which Borrower,
one or more other subsidiaries of Borrower or Borrower and one or more
subsidiaries of Borrower, directly or indirectly, has at least a majority
ownership interest or the power to direct the policies, management and affairs
thereof.

     "Term Loan" shall mean the Loan granted to Borrower by the Banks in the
original principal amount of One Hundred Eighteen Million Dollars
($118,000,000), in accordance with Section 2.1 hereof.

     "Term Loan Commitment" shall mean the obligation hereunder of each Bank to
participate in the making of the Term Loan, on a pro rata basis, according to
such Bank's Term Loan Commitment Percentage, up to such Bank's Term Loan
Commitment Amount.

     "Term Loan Commitment Amount" shall mean, for each Bank, the amount set
forth opposite such Bank's name under the column headed "Term Loan Commitment
Amount", as set forth on Schedule 1 hereto.
                         ----------

     "Term Loan Commitment Percentage" shall mean, for each Bank, the percentage
set forth opposite such Bank's name under the column headed "Term Loan
Commitment Percentage", as set forth on Schedule 1 hereto.
                                        ----------

     "Total Commitment Amount" shall mean the principal amount of One Hundred
Eighteen Million Dollars ($118,000,000).

     "Total Funded Indebtedness" shall mean all Funded Indebtedness.

                                       17
<PAGE>

     "Total Senior Funded Indebtedness" shall mean all Total Funded Indebtedness
other than Subordinated Indebtedness.

     "Unmatured Event of Default" shall mean an event or condition that
constitutes, or with the lapse of any applicable grace period or the giving of
notice or both would constitute, an Event of Default and that has not been
waived by the Majority Banks in writing.

     "Voting Power" shall mean, with respect to any Person, the exclusive
ability to control, through the ownership of shares of capital stock,
partnership interests, membership interests or otherwise, the election of
members of the board of directors or other similar governing body of such
Person, and the holding of a designated percentage of Voting Power of a Person
means the ownership of shares of capital stock, partnership interests,
membership interests or other interests of such Person sufficient to control
exclusively the election of that percentage of the members of the board of
directors or similar governing body of such Person.

     "Welfare Plan" shall mean a Plan that is a "welfare plan" within the
meaning of ERISA Section 3 (l).

     "Wholly-Owned Subsidiary" shall mean, with respect to any Person, any
corporation, limited liability company or other entity all of the securities or
other ownership interest, of which having ordinary voting power to elect a
majority of the board of directors or other persons performing similar functions
are at the time directly or indirectly owned by such Person.

     Any accounting term not specifically defined in this Article I shall have
the meaning ascribed thereto by GAAP.

     The foregoing definitions shall be applicable to the singular and plurals
of the foregoing defined terms.


                    ARTICLE II. AMOUNT AND TERMS OF CREDIT

     SECTION 2.1. AMOUNT AND NATURE OF CREDIT. Subject to the terms and
conditions of this Agreement, each Bank will participate to the extent
hereinafter provided in making the Term Loan to Borrower, pursuant to the Term
Loan Commitments; provided, however, that in no event shall the aggregate
principal amount of the Term Loan be in excess of the Total Commitment Amount.

     Each Bank, for itself and not one for any other, agrees to participate in
making the Term Loan on such basis that (a) immediately after the making of the
Term Loan to Borrower hereunder, the aggregate principal amount then outstanding
on the Note issued to such Bank shall not be in excess of the Term Loan
Commitment Amount for such Bank, and (b) such aggregate principal amount
outstanding on the Note issued to such Bank shall represent that

                                       18
<PAGE>

percentage of the aggregate principal amount then outstanding on all Notes
(including the Note held by such Bank) that is such Bank's Term Loan Commitment
Percentage.

     Subject to the terms and conditions of this Agreement, the Banks shall make
the Term Loan to Borrower on the Closing Date, in the aggregate amount of the
Term Loan Commitments.  To evidence the Term Loan, Borrower shall execute and
deliver to each Bank a Term Note, in the form of Exhibit A hereto.  The Term
                                                 ---------
Loan shall be payable in full on the Maturity Date.

     Borrower shall notify Agent, in accordance with the notice provisions of
Section 2.2 hereof, whether the Term Loan will bear interest at the Prime Rate
Option or one or more LIBOR Rate Options.  The Term Loan may be a mixture of a
Prime Rate Option and LIBOR Rate Options. At the request of Borrower to Agent,
subject to the applicable notice and other provisions of Section 2.2 hereof, the
Banks shall change all or any part of the Prime Interest Segment to a LIBOR Rate
Option at any time and shall change any LIBOR Interest Segment to a Prime Rate
Option on the  Interest Adjustment Date applicable to such LIBOR Interest
Segment.

     With respect to the Prime Interest Segment, if any, Borrower shall pay
interest on the unpaid principal amount thereof outstanding from time to time
from the date thereof until paid, commencing June 30, 2000, and continuing on
the last day of each succeeding September, December, March and June thereafter
and at the maturity thereof, at the Derived Prime Rate from time to time in
effect.

     With respect to each LIBOR Interest Segment, Borrower shall pay interest on
the unpaid principal amount thereof outstanding from time to time from the date
thereof until paid, at the Derived LIBOR Rate, fixed in advance for each
Interest Period (but subject to changes in the Applicable Margin) as herein
provided for each such Interest Period.  Interest on each such LIBOR Interest
Segment shall be payable on the Interest Adjustment Date applicable thereto
(provided that, if an Interest Period exceeds three (3) months, the interest
must be paid every three (3) months, commencing three (3) months from the
beginning of such Interest Period).

     SECTION 2.2. CONDITIONS TO LOAN AND CHANGES IN INTEREST RATE. The
obligation of the Banks to make the Loan, and change the interest rate
applicable to any portion of the outstanding principal balance thereof, is
conditioned, in the case of the initial borrowing and upon each change of
interest rate hereunder, upon:

     (a)  all conditions precedent as listed in Article IV hereof shall have
been satisfied;

     (b)  with respect to a request by Borrower for a Prime Rate Option, receipt
by Agent of a Notice of Interest Rate Selection, such notice to be received by
11:00 A.M. (Cleveland, Ohio time) on the proposed date that such Prime Rate
Option is to become effective, and, with respect to any notice of a LIBOR Rate
Option, receipt by Agent of a Notice of Interest Rate Selection by 11:00 A.M.
(Cleveland, Ohio time) three (3) Business Days prior to the proposed date that
such LIBOR Rate Option is to become effective.  Agent shall notify each Bank of
the date, amount

                                       19
<PAGE>

and Interest Period (if applicable) promptly upon the receipt of any such
notice, and, in any event, by 2:00 P.M. (Cleveland, Ohio time) on the date such
notice is received;

     (c)  Borrower's Notice of Interest Rate Selection with respect to a LIBOR
Interest Segment shall be in an amount of not less than Five Million Dollars
($5,000,000), increased by increments of One Million Dollars ($1,000,000);

     (d)  the fact that no Unmatured Event of Default or Event of Default shall
exist; and

     (e)  the fact that each of the representations and warranties contained in
Article VI hereof shall be true and correct.

     At no time shall Borrower have selected more than two (2) different
Interest Periods for LIBOR Rate Options.

     Each notice for a change to a LIBOR Rate Option shall be irrevocable and
binding on Borrower and Borrower shall indemnify Agent and the Banks against any
loss or expense incurred by Agent or the Banks as a result of any failure by
Borrower to consummate such change including, without limitation, any loss
(including loss of anticipated profits) or expense incurred by reason of
liquidation or re-employment of deposits or other funds acquired by the Banks to
fund such LIBOR Interest Segment. A certificate as to the amount of such loss or
expense submitted by the Banks to Borrower shall be conclusive and binding for
all purposes, absent manifest error.

     SECTION 2.3. PAYMENT ON NOTES, ETC.  All payments of principal, interest
and other fees shall be made to Agent in immediately available funds for the
account of the Banks, and Agent, within one (1) Business Day, shall distribute
to each Bank its ratable share of the amount of principal, interest and other
fees received by it for the account of such Bank. Each Bank shall record (a) any
principal, interest or other payment, and (b) the principal amount of the Prime
Interest Segment and each LIBOR Interest Segment and all prepayments thereof and
the applicable dates with respect thereto, by such method as such Bank may
generally employ; provided, however, that failure to make any such entry shall
in no way detract from Borrower's obligations under each Note. The aggregate
unpaid amount of the Loan set forth on the records of Agent shall be rebuttably
presumptive evidence of the principal and interest owing and unpaid on each
Note. Whenever any payment to be made hereunder, including, without limitation,
any payment to be made on any Note, shall be stated to be due on a day that is
not a Business Day, such payment shall be made on the next succeeding Business
Day and such extension of time shall in each case be included in the computation
of the interest payable on such Note; provided, however, that, with respect to
any LIBOR Interest Segment, if the next succeeding Business Day falls in the
succeeding calendar month, such payment shall be made on the preceding Business
Day and the relevant Interest Period shall be adjusted accordingly.

     SECTION 2.4. PREPAYMENT. Borrower shall have the right at any time or from
time to time to prepay, on a pro rata basis for all of the Banks, all or any
part of the principal amount

                                       20
<PAGE>

of the Term Loan then outstanding, as designated by Borrower, plus interest
accrued on the amount so prepaid to the date of such prepayment; provided,
however, that any amount so prepaid may not be reborrowed. Borrower shall give
Agent notice of prepayment of all or part of the Prime Interest Segment by not
later than 11:00 A.M. (Cleveland, Ohio time) on the Business Day such prepayment
is to be made and written notice of the prepayment of any LIBOR Interest Segment
not later than 1:00 P.M. (Cleveland, Ohio time) three (3) Business Days before
the Business Day on which such prepayment is to be made. Prepayments of the
Prime Interest Segment shall be without any premium or penalty.

     In any case of change of a LIBOR Interest Segment to a Prime Rate Option or
different LIBOR Rate Option, or of prepayment of any amount of any LIBOR
Interest Segment, prior to the last day of the Interest Period applicable
thereto (a "Revision To Interest Period"), Borrower agrees that if the
reinvestment rate, as quoted by the money desk of Agent ("Reinvestment Rate"),
shall be lower than the LIBOR Rate applicable to the LIBOR Interest Segment that
is intended to have a Revision To Interest Period (hereinafter, "Last LIBOR"),
then Borrower shall, upon written notice by Agent, promptly pay to Agent, for
the benefit of the Banks, in immediately available funds, a LIBOR breakage fee
equal to the product of (a) a rate that shall be equal to the difference between
the Last LIBOR and the Reinvestment Rate, times (b) the principal amount of the
LIBOR Interest Segment that is to have a Revision To Interest Period, times (c)
(i) the number of days remaining in the Interest Period of the LIBOR Interest
Segment that is to have a Revision To Interest Period divided by (ii) three
hundred sixty (360).  In addition, Borrower shall immediately pay directly to
Agent, for the account of the Banks, the amount of any additional costs or
expenses (including, without limitation, cost of telex, wires, or cables)
incurred by Agent or the Banks in connection with such Revision To Interest
Period, upon Borrower's receipt of a written statement from Agent.

     SECTION 2.5. COMPUTATION OF INTEREST AND FEES; DEFAULT RATE. Interest on
the Loan, Related Expenses and other fees and charges hereunder shall be
computed on the basis of a year having three hundred sixty (360) days and
calculated for the actual number of days elapsed. Anything herein to the
contrary notwithstanding, if an Event of Default shall occur hereunder, the
principal of each Note (and the unpaid interest thereon after acceleration of
the Debt pursuant to Article VIII hereof) shall bear interest, until paid, at
the Default Rate. In no event shall the rate of interest hereunder exceed the
maximum rate allowable by law.

     SECTION 2.6. EXTENSION OF MATURITY DATE.  Contemporaneously with the
delivery of the financial statements required pursuant to Section 5.3 (b)
hereof, Borrower may deliver a written request that the Banks extend the
Maturity Date for an additional year. Each such extension shall require the
unanimous written consent of all of the Banks and shall be upon such terms and
conditions as may be agreed to by Agent, Borrower and the Banks. Borrower shall
pay any attorneys' fees or other expenses of Agent in connection with the
documentation of any such extension, as well as such other fees as may be agreed
upon between Borrower and Agent and the Banks.

                                       21
<PAGE>

     SECTION 2.7. PARTIAL RELEASE OF MORTGAGED REAL PROPERTY. Borrower shall
have the right at any time to request that Agent, on behalf of the Banks,
release the Lien of Agent, for the benefit of the Banks, on any of the Mortgaged
Real Property or any part thereof, under the following conditions:

     (a)  Borrower shall submit a written request to Agent no fewer than ten
(10) Business Days prior to the proposed date of release, describing the
Mortgaged Real Property, or portion thereof, that Borrower is seeking to have
released (the "Released Parcel") by legal description, with such request to
state (i) the proposed sale price, if any, or any other available information
regarding the fair market value of the Released Parcel, (ii) the current use of
the Released Parcel, (iii) that such Released Parcel is no longer necessary to
the operation of any Company's business and (iv) that the business of the
Companies can continue to be operated profitably with the remainder of the
Mortgaged Real Property;

     (b)  the Companies agree to, and do in fact, substitute as security any and
all property, if any, acquired in exchange for the Released Parcel or acquired
with the proceeds received from the sale of such Released Parcel; and

     (c)  Agent determines, in its reasonable discretion, that such release of
the Released Parcel will not have a material adverse effect on the collateral
securing the Debt or on any Company's ability to profitably conduct its business
with the remainder of the Mortgaged Real Property.

Upon the satisfaction of all of the foregoing, Agent, on behalf of the Banks,
and Borrower shall execute such releases, agreements and other items as may be
deemed necessary by Agent.


            ARTICLE III.   ADDITIONAL PROVISIONS RELATING TO LIBOR
                  INTEREST SEGMENTS; INCREASED CAPITAL; TAXES.

     SECTION 3.1. RESERVES OR DEPOSIT REQUIREMENTS, ETC. If, at any time, any
law, treaty or regulation (including, without limitation, Regulation D of the
Board of Governors of the Federal Reserve System) or the interpretation thereof
by any governmental authority charged with the administration thereof or any
central bank or other fiscal, monetary or other authority shall impose (whether
or not having the force of law), modify or deem applicable any reserve and/or
special deposit requirement (other than reserves included in the Eurocurrency
Reserve Percentage, the effect of which is reflected in the interest rate(s) of
the LIBOR Interest Segment(s) in question) against assets held by, or deposits
in or for the amount of any LIBOR Interest Segment by, any Bank, and the result
of the foregoing is to increase the cost (whether by incurring a cost or adding
to a cost) to such Bank of maintaining hereunder such LIBOR Interest Segment or
to reduce the amount of principal or interest received by such Bank with respect
to such LIBOR Interest Segment, then, upon demand by such Bank, Borrower shall
pay to such Bank from time to time on Interest Adjustment Dates with respect to
such LIBOR Interest Segment, as additional consideration hereunder, additional
amounts sufficient to fully compensate and indemnify such Bank for such
increased cost or reduced amount, assuming

                                       22
<PAGE>

(which assumption such Bank need not corroborate) such additional cost or
reduced amount was allocable to such LIBOR Interest Segment. A certificate as to
the increased cost or reduced amount as a result of any event mentioned in this
Section 3.1, setting forth the calculations therefor, shall be promptly
submitted by such Bank to Borrower and shall, in the absence of manifest error,
be conclusive and binding as to the amount thereof. Notwithstanding any other
provision of this Agreement, after any such demand for compensation by any Bank,
Borrower, upon at least three (3) Business Days' prior written notice to such
Bank through Agent, may select a Prime Rate Option regardless of the Interest
Period thereof. Any such selection of a Prime Rate Option for a LIBOR Interest
Segment prior to the end of the Interest Period for such LIBOR Interest Segment
shall be subject to the LIBOR Breakage Fees. Each Bank shall notify Borrower as
promptly as practicable (with a copy thereof delivered to Agent) of the
existence of any event that will likely require the payment by Borrower of any
such additional amount under this Section.

     SECTION 3.2. TAX LAW, ETC. In the event that by reason of any law,
regulation or requirement or in the interpretation thereof by an official
authority, or the imposition of any requirement of any central bank whether or
not having the force of law, any Bank shall, with respect to this Agreement or
any transaction under this Agreement, be subjected to any tax, levy, impost,
charge, fee, duty, deduction or withholding of any kind whatsoever (other than
any tax imposed upon the total net income of such Bank) and if any such measures
or any other similar measure shall result in an increase in the cost to such
Bank of any LIBOR Rate Option or in a reduction in the amount of principal or
interest receivable by such Bank in respect thereof, then such Bank shall
promptly notify Borrower stating the reasons therefor. Borrower shall thereafter
pay to such Bank, upon demand from time to time on Interest Adjustment Dates
with respect to such LIBOR Interest Segment, as additional consideration
hereunder, such additional amounts as shall fully compensate such Bank for such
increased cost or reduced amount. A certificate as to any such increased cost or
reduced amount, setting forth the calculations therefor, shall be submitted by
such Bank to Borrower and shall, in the absence of manifest error, be conclusive
and binding as to the amount thereof.

     If any Bank receives such additional consideration from Borrower pursuant
to this Section 3.2, such Bank shall use reasonable efforts to obtain the
benefits of any refund, deduction or credit for any taxes or other amounts on
account of which such additional consideration has been paid and shall reimburse
Borrower to the extent, but only to the extent, that such Bank shall receive a
refund of such taxes or other amounts together with any interest thereon or an
effective net reduction in taxes or other governmental charges (including any
taxes imposed on or measured by the total net income of such Bank) of the United
States or any state or subdivision thereof by virtue of any such deduction or
credit, after first giving effect to all other deductions and credits otherwise
available to such Bank. If, at the time any audit of such Bank's income tax
return is completed, such Bank determines, based on such audit, that it was not
entitled to the full amount of any refund reimbursed to Borrower as aforesaid or
that its net income taxes are not reduced by a credit or deduction for the full
amount of taxes reimbursed to Borrower as aforesaid, Borrower, upon demand of
such Bank, shall promptly pay to such Bank

                                       23
<PAGE>

the amount so refunded to which such Bank was not so entitled, or the amount by
which the net income taxes of such Bank were not so reduced, as the case may be.

     Notwithstanding any other provision of this Agreement, after any such
demand for compensation by any Bank, Borrower, upon at least three (3) Business
Days' prior written notice to such Bank through Agent, may select a Prime Rate
Option for such LIBOR Interest Segment regardless of the Interest Period of any
such LIBOR Interest Segment. Any such selection of a Prime Rate Option for a
LIBOR Interest Segment prior to the end of the Interest Period for such LIBOR
Interest Segment shall be subject to the LIBOR Breakage Fees.

     SECTION 3.3. EURODOLLAR DEPOSITS UNAVAILABLE OR INTEREST RATE
UNASCERTAINABLE. In respect of any LIBOR Interest Segment, in the event that
Agent shall have determined that dollar deposits of the relevant amount for the
relevant Interest Period for such LIBOR Interest Segment are not available to
Agent in the applicable eurodollar market or that, by reason of circumstances
affecting such market, adequate and reasonable means do not exist for
ascertaining the LIBOR Rate applicable to such Interest Period, as the case may
be, Agent shall promptly give notice of such determination to Borrower and (a)
any notice of a new LIBOR Interest Segment (or change of interest rate from a
Prime Rate Option to a LIBOR Rate Option) previously given by Borrower and not
yet finalized shall be deemed to be a request for a Prime Rate Option, and (b)
Borrower shall be obligated to select a Prime Rate Option for each LIBOR
Interest Segment on the last day of the then current Interest Period with
respect thereto.

     SECTION 3.4. INDEMNITY.  Without prejudice to any other provisions of this
Article III, Borrower hereby agrees to indemnify each Bank against any loss or
expense that such Bank may sustain or incur as a consequence of any default by
Borrower in payment when due of any amount hereunder in respect of any LIBOR
Interest Segment, including, but not limited to, any loss of profit, premium or
penalty incurred by such Bank in respect of funds obtained by it for the purpose
of providing or maintaining such LIBOR Rate Option, as determined by such Bank
in the exercise of its sole but reasonable discretion. A certificate as to any
such loss or expense shall be promptly submitted by such Bank to Borrower and
shall, in the absence of manifest error, be conclusive and binding as to the
amount thereof.

     SECTION 3.5. CHANGES IN LAW RENDERING LIBOR RATE OPTIONS UNLAWFUL. If at
any time any new law, treaty or regulation, or any change in any existing law,
treaty or regulation, or any interpretation thereof by any governmental or other
regulatory authority charged with the administration thereof, shall make it
unlawful for any Bank to fund any LIBOR Interest Segment that it is committed to
make hereunder with moneys obtained in the eurodollar market, the commitment of
such Bank to fund such LIBOR Interest Segment shall, upon the happening of such
event forthwith be suspended for the duration of such illegality, and such Bank
shall by written notice to Borrower and Agent declare that its commitment with
respect to such LIBOR Rate Option has been so suspended and, if and when such
illegality ceases to exist, such suspension shall cease and such Bank shall
similarly notify Borrower and Agent. If any such change shall make it unlawful
for any Bank to continue in effect the funding in the applicable eurodollar
market of any LIBOR Interest Segment previously made by it

                                       24
<PAGE>

hereunder, such Bank shall, upon the happening of such event, notify Borrower,
Agent and the other Banks thereof in writing stating the reasons therefor, and
Borrower shall, on the earlier of (a) the last day of the then current Interest
Period or (b) if required by such law, regulation or interpretation, on such
date as shall be specified in such notice, select a Prime Rate Option. Any such
selection of a Prime Rate Option for a LIBOR Interest Segment prior to the end
of the Interest Period for such LIBOR Interest Segment shall be subject to the
LIBOR Breakage Fees.

     SECTION 3.6. FUNDING.  Each Bank may, but shall not be required to, fund
any LIBOR Interest Segment hereunder with moneys obtained outside the United
States.

     SECTION 3.7. CAPITAL ADEQUACY. If any Bank shall have determined, after the
Closing Date, that the adoption of any applicable law, rule, regulation or
guideline regarding capital adequacy, or any change therein, or any change in
the interpretation or administration thereof by any governmental authority,
central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by any Bank (or its lending office) with
any request or directive regarding capital adequacy (whether or not having the
force of law) of any such authority, central bank or comparable agency, has or
would have the effect of reducing the rate of return on such Bank's capital (or
the capital of its holding company) as a consequence of its obligations
hereunder to a level below that which such Bank (or its holding company) could
have achieved but for such adoption, change or compliance (taking into
consideration such Bank's policies or the policies of its holding company with
respect to capital adequacy) by an amount deemed by such Bank to be material,
then from time to time, within fifteen (15) days after demand by such Bank (with
a copy to Agent), Borrower shall pay to such Bank such additional amount or
amounts as shall compensate such Bank (or its holding company) for such
reduction. Each Bank shall designate a different lending office if such
designation will avoid the need for, or reduce the amount of, such compensation
and will not, in the judgment of such Bank, be otherwise disadvantageous to such
Bank. A certificate of any Bank claiming compensation under this Section and
setting forth the additional amount or amounts to be paid to it hereunder shall
be conclusive in the absence of manifest error. In determining such amount, such
Bank may use any reasonable averaging and attribution methods. Failure on the
part of any Bank to demand compensation for any reduction in return on capital
with respect to any period shall not constitute a waiver of such Bank's rights
to demand compensation for any reduction in return on capital in such period or
in any other period. The protection of this Section shall be available to each
Bank regardless of any possible contention of the invalidity or inapplicability
of the law, regulation or other condition that shall have been imposed.

                      ARTICLE IV.   CONDITIONS PRECEDENT


     The obligation of the Banks to make the Loan is subject to Borrower
satisfying each of the following conditions:

     SECTION 4.1. NOTES.  Borrower shall have executed and delivered to each
Bank its Term Note.

                                       25
<PAGE>

     SECTION 4.2. GUARANTIES OF PAYMENT OF DEBT.  Each Pledgor shall have
executed and delivered to Agent, for the benefit of the Banks, a Guaranty of
Payment, in form and substance satisfactory to Agent.

     SECTION 4.3. INTERCREDITOR AGREEMENT. The Intercreditor Agreement shall
have been executed by each party thereto and shall have been acknowledged and
agreed to by Borrower and each Pledgor.

     SECTION 4.4. OFFICER'S CERTIFICATE, RESOLUTIONS, ORGANIZATIONAL DOCUMENTS.
Borrower and each Pledgor shall have delivered to Agent an officer's certificate
certifying the names of the officers of Borrower or such Pledgor authorized to
sign the Loan Documents, together with the true signatures of such officers and
certified copies of (a) the resolutions of the board of directors of Borrower
and each Pledgor evidencing approval of the execution and delivery of the Loan
Documents and the execution of other Related Writings to which Borrower or such
Pledgor, as the case may be, is a party, and (b) the Articles (or Certificate)
of Incorporation, and all amendments thereto, of Borrower and each Pledgor.

     SECTION 4.5. LEGAL OPINION.  Borrower shall have delivered to Agent, for
the benefit of Agent and the Banks, such opinions of counsel for Borrower and
each Pledgor, in form and substance satisfactory to Agent and the Majority
Banks, as Agent may deem necessary or appropriate.

     SECTION 4.6. GOOD STANDING CERTIFICATES.  Borrower shall have delivered to
Agent a good standing certificate for Borrower and each Pledgor, issued on or
about the Closing Date by the Secretary of State in the state where Borrower or
such Pledgor is incorporated and in each state in which Borrower or such Pledgor
is qualified as a foreign corporation and conducts a material amount of
business.

     SECTION 4.7. CLOSING AND LEGAL FEES; AGENT FEE LETTER.  Borrower shall have
(a) executed and delivered to Agent the Agent Fee Letter and paid to Agent, for
its sole benefit, the fees described therein, (b) executed and delivered to the
Banks the Bank Fee Letter and paid to each of the Banks the fees described
therein, and (c) paid all legal fees and expenses of Agent in connection with
the preparation and negotiation of the Loan Documents.

     SECTION 4.8. SECURITY DOCUMENTS.  Agent shall have received (a) Pledge
Agreements, executed by Borrower and each Pledgor, as appropriate; (b) Security
Agreements, executed by Borrower and each Pledgor; (c) with respect to each
Documented Vessel, a Preferred Ship Mortgage, in form and substance satisfactory
to Agent; and (d) a Collateral Assignment and Security Agreement, executed by
Borrower and each Pledgor, as deemed necessary or appropriate by Agent.

                                       26
<PAGE>

     SECTION 4.9.  MORTGAGES. With respect to the Mortgaged Real Property,
Borrower shall have delivered to Agent a Mortgage executed by Borrower or a
Pledgor, as appropriate, each of which shall be in form and substance
satisfactory to Agent.

     SECTION 4.10. LIEN SEARCHES. With respect to the property owned or leased
by Borrower and each Pledgor, Borrower shall have caused to be delivered to
Agent, for the benefit of the Banks, (a) U.C.C. financing statements
satisfactory to Agent; (b) the results of U.C.C. lien searches, satisfactory to
Agent and the Banks; (c) the results of federal and state tax lien and judicial
lien searches, satisfactory to Agent and the Banks; and (d) U.C.C. termination
statements reflecting termination of all financing statements previously filed
by any party having a security interest in any part of the collateral or any
other property securing the Debt and not permitted pursuant to Section 5.9
hereof.

     SECTION 4.11. INDENTURE.  With respect to the Indenture, Borrower shall
have provided to Agent and the Banks:

          (a)  a copy of the Indenture, together with any amendments or
     supplements thereto, certified by an officer of Borrower as being true and
     complete;

          (b)  an Indenture Trustee's Certificate duly executed by the Indenture
     Trustee;

          (c)  an officer's certificate, signed by a Financial Officer of
     Borrower and each Pledgor and otherwise in form and substance satisfactory
     to Agent and the Banks, certifying that (i) no Default (as defined in the
     Indenture) or Event of Default (as defined in the Indenture) exists under
     the Indenture, nor will exist after the making of the Loan hereunder, (ii)
     the Fixed Charge Coverage Ratio Condition does not exist, nor will exist
     after the making of the Loan hereunder, and (iv) all of the Debt
     constitutes Senior Indebtedness (as defined in the Indenture) and
     Designated Senior Indebtedness (as defined in the Indenture); and

          (d)  a copy of the notice given by the Indenture Trustee to the
     Noteholders (as defined in the Indenture) of the existence of additional
     Designated Senior Indebtedness (as defined in the Indenture) under this
     Agreement, with such notice to be in form and substance satisfactory to
     Agent and the Banks.

     SECTION 4.12. INSURANCE CERTIFICATES.  Borrower shall have delivered to
Agent evidence of insurance on ACORD 27 form and otherwise satisfactory to Agent
of adequate personal property and liability insurance of Borrower and each
Pledgor, with Agent listed as mortgagee, loss payee and additional insured.

     SECTION 4.13. CREDIT AGREEMENT.  All conditions precedent, as listed in
Article IV of the Credit Agreement, shall have been satisfied.

                                       27
<PAGE>

     SECTION 4.14. NO MATERIAL ADVERSE CHANGE.  No material adverse change, in
the opinion of Agent, shall have occurred in the financial condition, operations
or prospects of the Companies since September 30, 1999.

     SECTION 4.15. MISCELLANEOUS.  Borrower shall have provided to Agent and the
Banks such other items and shall have satisfied such other conditions as may be
reasonably required by Agent or the Banks.

                            ARTICLE V.   COVENANTS


     Borrower agrees that until all of the Debt shall have been paid in full,
Borrower shall perform and observe, and shall cause each other Company to
perform and observe, each of the following provisions:

     SECTION 5.1.  INSURANCE.  Each Company shall at all times maintain
insurance upon its personal and real property in such form, written by such
companies, in such amounts, for such period, and against such risks as may be
acceptable to Agent, with provisions satisfactory to Agent, for payment of all
losses thereunder to Agent, for the benefit of the Banks, and such Company as
their interests may appear (loss payable endorsement in favor of Agent, for the
benefit of the Banks), and, if required by Agent, Borrower shall deposit the
policies with Agent. Any such policies of insurance shall provide for no fewer
than thirty (30) days prior written notice of cancellation to Agent. Any sums
received by Agent, for the benefit of the Banks, in payment of insurance losses,
returns, or unearned premiums under the policies may, at the option of Agent, be
applied upon any Debt whether or not the same is then due and payable, or may be
delivered to Borrower for the purpose of replacing, repairing, or restoring the
insured property; provided, however, that any sums received by Agent which are
less than the aggregate amount of Ten Million Dollars ($10,000,000) shall be
paid to Borrower, if Borrower so requests, for the sole purpose of rebuilding,
replacing or restoring the property which has been damaged or destroyed. Agent
is hereby authorized to act as attorney-in-fact for Borrower in obtaining,
adjusting, settling and canceling such insurance and indorsing any drafts. In
the event of failure to provide such insurance as herein provided, Agent may, at
its option, provide such insurance and Borrower shall pay to Agent, upon demand,
the cost thereof. Should Borrower fail to pay such sum to Agent upon demand,
interest shall accrue thereon, from the date of demand until paid in full, at
the Default Rate. Within ten (10) days of any Bank's written request, Borrower
shall furnish to such Bank such information about a Company's insurance as such
Bank may from time to time reasonably request, which information shall be
prepared in form and detail satisfactory to such Bank and certified by a
Financial Officer of such Company.

     SECTION 5.2. MONEY OBLIGATIONS.  Each Company shall pay in full (a) prior
in each case to the date when penalties would attach, all taxes, assessments and
governmental charges and levies (except only those so long as and to the extent
that the same shall be contested in good faith by appropriate and timely
proceedings and for which adequate reserves have been established in accordance
with GAAP) for which it may be or become liable or to which any or all of its
properties may be or become subject; (b) all of its wage obligations to its
employees in

                                       28
<PAGE>

compliance with the Fair Labor Standards Act (29 U.S.C. 206-207) or any
comparable provisions; and (c) all of its other obligations calling for the
payment of money (except only those so long as and to the extent that the same
shall be contested in good faith and for which adequate reserves have been
established in accordance with GAAP) before such payment becomes overdue.

     SECTION 5.3. FINANCIAL STATEMENTS. Borrower shall furnish to each Bank:

     (a)  within forty-five (45) days after the end of each of the first three
(3) quarter-annual periods of each fiscal year of Borrower, balance sheets of
Borrower as of the end of such period and statements of income (loss) and cash-
flows for the quarter and fiscal year to date periods, all prepared on a
Consolidated and consolidating basis, in accordance with GAAP, and in form and
detail satisfactory to the Banks and certified by a Financial Officer of
Borrower;

     (b)  within ninety (90) days after the end of each fiscal year of Borrower,
an annual audit report of Borrower for that year prepared on a Consolidated and
consolidating basis, in accordance with GAAP, and in form and detail
satisfactory to the Banks and certified by an independent public accountant
satisfactory to Agent (Agent acknowledges that the independent public accountant
being used by Borrower as of the Closing Date is satisfactory to Agent), which
report shall include balance sheets and statements of income (loss),
stockholders' equity and cash-flows for that period, together with a certificate
by the accountant setting forth the Events of Default coming to its attention
during the course of its audit or, if none, a statement to that effect;

     (c)  concurrently with the delivery of the financial statements in (a) and
(b) above, a Compliance Certificate together with calculations of the financial
covenants set forth in Section 5.7 hereof;

     (d)  with the delivery of the annual financial statements in (a) above, a
copy of any management report, letter or similar writing furnished to the
Companies by the accountants in respect of the Companies' systems, operations,
financial condition or properties;

     (e)  (i) within ninety (90) days after the end of each fiscal year of
Borrower, annual pro-forma projections of Borrower and its Subsidiaries for the
then current fiscal year, to be in form acceptable to Agent, and (ii) together
with the delivery of the quarterly financial statements for the third quarter of
each fiscal year, annual projections for the next two (2) succeeding fiscal
years, to be in form acceptable to Agent;

     (f)  within forty-five (45) days after the end of each fiscal quarter of
Borrower, financial forecasts of Borrower and its Subsidiaries for the next
fiscal quarter;

     (g)  as soon as available, copies of all notices, reports, definitive proxy
or other statements and other documents sent by Borrower to its shareholders, to
the holders of any of its debentures or bonds or the trustee of any indenture
securing the same or pursuant to which they are issued, or sent by Borrower (in
final form) to any securities exchange or over the counter

                                       29
<PAGE>

authority or system, or to the Securities and Exchange Commission or any similar
federal agency having regulatory jurisdiction over the issuance of Borrower's
securities; and

     (h)  within ten (10) days of any Bank's written request, such other
information about the financial condition, properties and operations of any
Company as such Bank may from time to time reasonably request, which information
shall be submitted in form and detail satisfactory to such Bank and certified by
a Financial Officer of the Company or Companies in question.

     SECTION 5.4.   FINANCIAL RECORDS. Each Company shall at all times maintain
true and complete records and books of account, including, without limiting the
generality of the foregoing, appropriate reserves for possible losses and
liabilities, all in accordance with GAAP, and at all reasonable times (during
normal business hours and upon notice to such Company) permit the Banks to
examine that Company's books and records and to make excerpts therefrom and
transcripts thereof.

     SECTION 5.5. FRANCHISES. Each Company shall preserve and maintain at all
times its corporate existence and all material rights and franchises.

     SECTION 5.6. ERISA COMPLIANCE. No Company shall incur any material
accumulated funding deficiency within the meaning of ERISA, or any material
liability to the PBGC, established thereunder in connection with any Plan.
Borrower shall furnish to the Banks (a) either in accordance with the time frame
set forth in the applicable federal regulations or, if no such regulation is
applicable, within thirty (30) days after any Company knows or has reason to
know that any Reportable Event with respect to any Plan has occurred, a
statement of the Financial Officer of such Company, setting forth details as to
such Reportable Event and the action that such Company proposes to take with
respect thereto, together with a copy of the notice of such Reportable Event
given to the PBGC if a copy of such notice is available to such Company, and (b)
promptly after receipt thereof a copy of any notice such Company, or any member
of the Controlled Group may receive from the PBGC or the Internal Revenue
Service with respect to any Plan administered by such Company; provided, that
this latter clause shall not apply to notices of general application promulgated
by the PBGC or the Internal Revenue Service. Borrower shall promptly notify the
Banks of any material taxes assessed, proposed to be assessed or that Borrower
has reason to believe may be assessed against a Company by the Internal Revenue
Service with respect to any Plan. As used in this Section "material" means the
measure of a matter of significance that shall be determined as being an amount
equal to five percent (5%) of the Consolidated Net Worth of Borrower. As soon as
practicable, and in any event within twenty (20) days, after any Company becomes
aware that an ERISA Event has occurred, such Company shall provide Bank with
notice of such ERISA Event with a certificate by a Financial Officer of such
Company setting forth the details of the event and the action such Company or
another Controlled Group member proposes to take with respect thereto. Borrower
shall, at the request of Agent or any Bank, deliver or cause to be delivered to
Agent or such Bank, as the case may be, true and correct copies of any documents
relating to the Plan of any Company.

     SECTION 5.7. FINANCIAL COVENANTS.

                                       30
<PAGE>

     (a)  LEVERAGE RATIO. The Companies shall not suffer or permit at any time
the Leverage Ratio to exceed (i) 4.75 to 1.00 on the Closing Date through
December 30, 2000, (ii) 4.50 to 1.00 on December 31, 2000 through December 30,
2001, and (iii) 4.25 to 1.00 on December 31, 2001 and thereafter.

     (b)  SENIOR DEBT RATIO. The Companies shall not suffer or permit at any
time the ratio of Total Senior Funded Indebtedness to Consolidated Pro-Forma
EBITDA to be greater than 3.50 to 1.00, based upon the financial statements of
the Companies for the most recently completed four (4) fiscal quarters.

     (c)  INTEREST COVERAGE. The Companies shall not suffer or permit at any
time the ratio of (i) Consolidated Pro-Forma Pre-Tax Earnings plus Consolidated
Pro-Forma Interest Expense to (ii) Consolidated Pro-Forma Interest Expense to be
less than 1.50 to 1.00, based upon the financial statements of the Companies for
the most recently completed four (4) fiscal quarters.

     (d)  CASH-FLOW COVERAGE. The Companies shall not suffer or permit at any
time the ratio of (i) Consolidated Pro-Forma Cash Flow to (ii) Consolidated Pro-
Forma Fixed Charges to be less than 1.10 to 1.00, based upon the financial
statements of the Companies for the most recently completed four (4) fiscal
quarters.

     (e)  NET WORTH. The Companies shall not suffer or permit Consolidated Net
Worth at any time, based upon the Consolidated financial statements of the
Companies for the most recently completed fiscal quarter, to fall below the
current minimum amount required, which current minimum amount required shall be
an amount equal to (i) One Hundred Nineteen Million Eight Hundred Fifty-Seven
Thousand Six Hundred Fifty Dollars ($119,857,650), plus (ii) sixty-five percent
(65%) of the positive Consolidated Net Earnings of the Companies for the fiscal
quarter ended March 31, 2000, on the Closing Date through June 29, 2000, with
such current minimum amount required to be positively increased by the Increase
Amount on June 30, 2000, and by an additional Increase Amount on the last day of
each fiscal quarter thereafter. As used herein, the term "Increase Amount" shall
mean an amount equal to (i) sixty-five percent (65%) of the positive
Consolidated Net Earnings of the Companies for the fiscal quarter then ended,
plus (ii) one hundred percent (100%) of the proceeds of any equity offering or
any debt offering convertible to equity.

     (f)  CONSOLIDATED PRO-FORMA EBITDA. The Companies shall not suffer or
permit at any time Consolidated Pro-Forma EBITDA to be less than (i) Sixty-Six
Million Dollars ($66,000,000) on the Closing Date through June 30, 2000, and
(ii) Seventy Million Dollars ($70,000,000) on July 1, 2000 and thereafter, based
upon the financial statements of the Companies for the most recently completed
four (4) fiscal quarters.

                                       31
<PAGE>

     SECTION 5.8. BORROWING. No Company shall create, incur or have outstanding
any obligation for borrowed money or any Indebtedness of any kind; provided,
that this Section shall not apply to:

     (a)  the Loan or any other Indebtedness incurred to Agent or the Banks
under this Agreement;

     (b)  Indebtedness incurred to Credit Agreement Agent or the Credit
Agreement Banks under the Credit Agreement;

     (c)  any loans or capital leases to a Company for the purchase or lease of
assets, which loans or leases are secured by the assets being purchased or
leased, so long as the aggregate principal amount of all such loans or leases
does not exceed Twenty-Five Million Dollars ($25,000,000) at any time
outstanding;

     (d)  the Indebtedness existing on the Closing Date as set forth in Schedule
                                                                        --------
5.8 hereto;
---

     (e)  Indebtedness under any Hedge Agreement acceptable to Agent;

     (f)  unsecured Subordinated Indebtedness;

     (g)  the Indebtedness of Oglebay Norton Marine Services Company, L.L.C.
existing on the Closing Date in connection with the NCB Ship Mortgage; or

     (h)  loans to a Company from a Company so long as each such Company is
Borrower or a Pledgor.

     SECTION 5.9. LIENS. No Company shall create, assume or suffer to exist any
Lien upon any of its property or assets, whether now owned or hereafter
acquired; provided that this Section shall not apply to the following:

     (a)  Liens incurred in connection with the Credit Agreement and subject to
the Intercreditor Agreement;

     (b)  Liens for taxes not yet due or that are being actively contested in
good faith by appropriate proceedings and for which adequate reserves have been
established in accordance with GAAP;

     (c)  other statutory Liens incidental to the conduct of its business or the
ownership of its property and assets that (i) were not incurred in connection
with the borrowing of money or the obtaining of advances or credit, and (ii) do
not in the aggregate materially detract from the value of its property or assets
or materially impair the use thereof in the operation of its business;

     (d)  Liens on property or assets of a Subsidiary to secure obligations of
such Subsidiary to Borrower or a Pledgor;

                                       32
<PAGE>

     (e)  Liens existing on the Closing Date as set forth in Schedule 5.9
                                                             ------------
hereto;


     (f)  Liens on fixed assets securing the loans or capital leases pursuant to
Section 5.8 (c) or (d) hereof, provided that such Lien only attaches to the
property being acquired or leased;

     (g)  any mortgage, security interest or Lien granted to Agent or Collateral
Agent, for the benefit of the Banks, securing the Debt or any Hedge Agreement
entered into with respect to the Debt;

     (h)  easements, rights-of-way or other minor defects or irregularities in
title the Real Property not interfering in any material respect with the use of
such property in the business of any Company; or

     (i)  Liens on fixed assets owned by a Company as a result of an Acquisition
permitted pursuant to Section 5.13 hereof, so long as such Liens are released
within ninety (90) days of such Acquisition (unless Borrower shall have obtained
the prior written consent of Agent and the Majority Banks).

No Company shall enter into any contract or agreement (other than a capital
lease or an agreement that creates a purchase money security interest) that
would prohibit Agent or the Banks from acquiring a security interest, mortgage
or other Lien on, or a collateral assignment of, any of the property or assets
of a Company.

     SECTION 5.10. REGULATIONS U and X. No Company shall take any action that
would result in any non-compliance of the Loan with Regulations U and X of the
Board of Governors of the Federal Reserve System.

     SECTION 5.11.  INVESTMENTS AND LOANS. No Company shall (a) create, acquire
or hold any Subsidiary, (b) make or hold any investment in any stocks, bonds or
securities of any kind, (c) be or become a party to any joint venture or other
partnership without the prior written consent of Agent and the Majority Banks,
(d) make or keep outstanding any advance or loan to any Person, or (e) be or
become a Guarantor of any kind, except guarantees only for Indebtedness of the
Companies incurred or permitted pursuant to this Agreement; provided that this
Section shall not apply to:

     (i)    any endorsement of a check or other medium of payment for deposit or
collection through normal banking channels or similar transaction in the normal
course of business;

     (ii)   any Permitted Investment;

     (iii)  the holding of Subsidiaries listed on Schedule 6.1 hereto;
                                                  ------------

                                       33
<PAGE>

     (iv)   loans to a Company from a Company so long as each such Company is
Borrower or a Pledgor; or

     (v)    the creation or holding of a Subsidiary, so long as such Subsidiary
becomes a Pledgor promptly after becoming a Subsidiary if required pursuant to
Section 5.21 hereof.

     SECTION 5.12. MERGER AND SALE OF ASSETS. No Company shall merge or
consolidate with any other Person, or sell, lease or transfer or otherwise
dispose of all or a substantial part of its assets to any Person, except that,
if no Unmatured Event of Default or Event of Default shall then exist or
immediately thereafter shall begin to exist:

     (a)  any Subsidiary may merge with (i) Borrower (provided that Borrower
shall be the continuing or surviving Person) or (ii) any one or more Pledgors,
provided that either (A) the continuing or surviving Person shall be a Wholly-
Owned Subsidiary that is a Pledgor, or (B) after giving effect to any merger
pursuant to this sub-clause (ii), Borrower and/or one or more Wholly-Owned
Subsidiaries that are Pledgors shall own not less than the same percentage of
the outstanding Voting Power of the continuing or surviving Person as Borrower
and/or one or more Wholly-Owned Subsidiaries (that are Pledgors) owned of the
merged Subsidiary immediately prior to such merger;

     (b)  any Subsidiary may sell, lease, transfer or otherwise dispose of any
of its assets to (i) Borrower, (ii) any Wholly-Owned Subsidiary that is a
Pledgor, or (iii) any Pledgor, of which Borrower and/or one or more Wholly-Owned
Subsidiaries, that are Pledgor, shall own not less than the same percentage of
Voting Power as Borrower and/or one or more Wholly-Owned Subsidiaries (that are
Pledgors) then own of the Subsidiary making such sale, lease, transfer or other
disposition;

     (c)  any Company may engage in any such conduct in connection with an
Acquisition permitted pursuant to Section 5.13 hereof so long as the resulting
Person is either Borrower or a Pledgor;

     (d)  any Company may (i) sell, lease or transfer inventory in the ordinary
course of business, or (ii) dispose of obsolete or no longer useful equipment or
other assets of such Company in the ordinary course of business so long as the
aggregate amount of all such dispositions by all Companies does not exceed One
Million Dollars ($1,000,000) during any fiscal year of Borrower; or

     (e)  in addition to any assets permitted to be disposed of pursuant to
subpart (d) above, Global Stone St. Clair, Inc. may sell all or substantially
all of its assets or Global Stone Corporation may sell all of the outstanding
stock of Global Stone St. Clair, Inc.

     SECTION 5.13. ACQUISITIONS. Without the prior written consent of Agent and
the Majority Banks, no Company shall effect an Acquisition; provided, that, so
long as no

                                       34
<PAGE>

Unmatured Event of Default or Event of Default shall then exist or immediately
thereafter shall begin to exist:

     (a)  Borrower or any Pledgor may effect an Acquisition so long as:

          (i)    Borrower or such Pledgor is the surviving entity of the
     Acquisition (in the case of a merger, consolidation or other combination)
     or the Person to be acquired becomes a Pledgor promptly after such
     Acquisition (in the case of the acquisition of the stock (or other equity
     interest) of a Person) in accordance with Section 5.22 hereof;

          (ii)   the Companies are in full compliance with the Loan Documents
     both prior to and subsequent to the transaction;

          (iii)  Borrower provides to Agent and the Banks, at least ten (10)
     days prior to the consummation of such Acquisition, (A) written notice of
     such Acquisition, (B) historical financial statements of such Person, (C) a
     pro forma financial statement of the Companies, and (D) a certificate of a
     Financial Officer of Borrower showing pro forma compliance with Section 5.7
     hereof, both before and after the proposed Acquisition; and

          (iv)   the aggregate Consideration paid by the Companies with respect
     to (A) any Level I Acquisition, when added to all other Level I
     Acquisitions during any four (4) consecutive fiscal quarters, does not
     exceed the Level I Acquisition Limit, or (B) any Level II Acquisition, when
     added to all other Level II Acquisitions during any four (4) consecutive
     fiscal quarters, does not exceed the Level II Acquisition Limit.

     (b)  Notwithstanding the limitations set forth in subpart (iv) of Section
5.13(a) above, any Company may effect the Permitted Acquisitions so long as the
conditions set forth in subparts (i), (ii) and (iii) of such Section 5.13(a) are
satisfied; provided, however, that the aggregate Consideration paid in
connection with the Permitted Acquisitions shall be included in determining the
Level II Acquisition Limit on the Closing Date and thereafter.

     SECTION 5.14. NOTICE.

     (a)  Borrower shall cause a Financial Officer of Borrower to promptly
notify Agent whenever any Unmatured Event of Default or Event of Default may
occur hereunder or any representation or warranty made in Article VI hereof or
elsewhere in this Agreement or in any Related Writing may for any reason cease
in any material respect to be true and complete.

     (b)  Borrower shall provide notice to Agent contemporaneously with any
notice provided to the Trustee (as defined in the Indenture) under the
Indenture.

     (c)  Borrower shall provide immediate written notice to Agent and the Banks
at any time that the Fixed Charge Coverage Ratio Condition exists or, within the
next three (3) months,

                                       35
<PAGE>

is likely to exist, based upon the quarterly financial forecasts delivered
pursuant to Section 5.3(f) hereof.

     SECTION 5.15.  ENVIRONMENTAL COMPLIANCE.  Each Company shall comply in all
material respects with any and all Environmental Laws including, without
limitation, (a) all Environmental Laws in jurisdictions in which any Company
owns or operates a facility or site, arranges for disposal or treatment of any
Hazardous Substance, solid waste or other wastes, accepts for transport any
Hazardous Substances, solid waste or other wastes or holds any interest in real
property or otherwise, and (b) all Environmental Laws relating to permits,
licenses, approval, authorizations, consents and registrations required for such
Company's operation. Borrower shall furnish to the Banks, promptly after receipt
thereof, a copy of any notice any Company may receive from any governmental
authority, private person or entity or otherwise that any material litigation or
proceeding pertaining to any environmental, health or safety matter has been
filed or is threatened against such Company, any real property in which such
Company holds any interest or any past or present operation of such Company. No
Company shall allow the Release or, to such Company's knowledge, disposal of any
Hazardous Substance, solid waste or other wastes on, under, to or about any real
property in which any Company holds any interest or performs any of its
operations, in violation of any Environmental Law. As used in this Section,
"litigation or proceeding" means any written demand, claim, notice, suit, suit
in equity action, administrative action, investigation or inquiry whether
brought by any governmental authority, private person or entity or otherwise.
Borrower shall defend, indemnify and hold Agent and the Banks harmless against
all costs, expenses, claims, damages, penalties and liabilities of every kind or
nature whatsoever (including reasonable attorneys and environmental consultant
fees) arising out of or resulting from the noncompliance of any Company with any
Environmental Law.

     SECTION 5.16.  AFFILIATE TRANSACTIONS. No Company shall, or shall permit
any Subsidiary to, directly or indirectly, enter into or permit to exist any
transaction (including, without limitation, the purchase, sale, lease or
exchange of any property or the rendering of any service) with any Affiliate of
a Company on terms that are less favorable to such Company or such Subsidiary,
as the case may be, than those that might be obtained at the time in a
transaction with a non-Affiliate; provided, however, that the foregoing shall
not prohibit the payment of customary and reasonable directors' fees to
directors who are not employees of a Company or any Affiliate of a Company.

     SECTION 5.17.  USE OF PROCEEDS. Borrower's use of the proceeds of the Loan
shall be for working capital and other general corporate purposes of Borrower
and its Subsidiaries and for Acquisitions permitted pursuant to the terms of
this Agreement.

     SECTION 5.18.  CAPITAL EXPENDITURES.  Borrower and its Subsidiaries shall
not invest in Consolidated Capital Expenditures more than an aggregate amount
equal to Forty-Five Million Dollars ($45,000,000) during each fiscal year of
Borrower.

                                       36
<PAGE>

     SECTION 5.19.  CORPORATE NAMES. No Company shall change its corporate name,
unless, in each case, Borrower shall provide Agent and each Bank with thirty
(30) days prior written notice thereof; provided, however, that this Section
shall not apply to the name change of Global Stone Port Inland, Inc. to Michigan
Limestone Products, Inc., which name change shall occur within thirty (30) days
after the Closing Date.

     SECTION 5.20. CAPITAL DISTRIBUTIONS.  No Company shall pay or commit
themselves to pay any Capital Distributions at any time; provided, however,
that:

     (a)  any Company may pay or commit itself to pay a Capital Distribution at
any time to Borrower or a Pledgor; and

     (b)  Borrower may pay or commit itself to pay Capital Distributions in an
amount not to exceed Ten Million Dollars ($10,000,000) during each fiscal year
of Borrower, commencing with the fiscal year ending December 31, 2000.

     SECTION 5.21. RESTRICTED PAYMENTS. No Company shall (a) make any payment
including, but not limited to, any prepayment, mandatory redemption or optional
redemption of any kind, or (b) exercise any right of defeasance or covenant
defeasance or similar right, with respect to any Subordinated Indebtedness,
except that, if no Event of Default shall then exist or immediately thereafter
shall begin to exist, Borrower may make regularly scheduled payments of interest
with respect to any Subordinated Indebtedness.

     SECTION 5.22. SUBSIDIARIES CREATED, ACQUIRED OR HELD SUBSEQUENT TO THE
CLOSING DATE. Each Subsidiary or other affiliate of a Company created, acquired
or held subsequent to the Closing Date, shall (a) immediately become a Pledgor
and shall deliver to Agent and the Banks such corporate governance and
authorization documents and an opinion of counsel as may be deemed necessary or
advisable by Agent; and (b) Borrower, or a Pledgor, as appropriate, shall
deliver to Agent, for the benefit of the Banks, the share certificates, or other
evidence of equity interest, pursuant to the terms of the Pledge Agreement;
provided, however, that (i) a Foreign Subsidiary shall not be required to become
a Pledgor, (ii) no Company shall be required to pledge more than sixty-five
(65%) of the outstanding shares of stock of any Foreign Subsidiary, and (iii) a
Subsidiary shall not be required to become a Pledgor so long as (A) the total
assets of such Subsidiary are less than the amount of Five Hundred Thousand
Dollars ($500,000), and (B) the aggregate of the total assets of all such
Subsidiaries with total asset values of less than Five Hundred Thousand Dollars
($500,000) does not exceed the aggregate amount of Three Million Dollars
($3,000,000). In the event that the total assets of any Subsidiary that is not a
Pledgor are at any time equal to or greater than Five Hundred Thousand Dollars
($500,000), Borrower shall provide Agent and the Banks with prompt written
notice of such asset value.

     SECTION 5.23.  PROPERTY ACQUIRED OR HELD SUBSEQUENT TO CLOSING DATE.
Borrower shall provide Agent with prompt written notice with respect to any Real
Property or documented vessel acquired subsequent to the Closing Date or held by
a

                                       37
<PAGE>

Company with a fair market value in excess of One Million Dollars ($1,000,000),
and with respect to such Real Property or documented vessel shall, at the
request of Agent, provide, or cause such Company to provide, to Agent, for the
benefit of the Banks, (a) a Mortgage or Preferred Ship Mortgage, as applicable,
(b) such other information, documents or agreements as may be deemed necessary
or advisable by Agent and the Banks in connection with such Mortgage or
Preferred Ship Mortgage, as applicable, and (c) such corporate governance and
authorization documents and an opinion of counsel as may be deemed necessary or
advisable by Agent and the Banks.

     SECTION 5.24. OTHER COVENANTS. In the event that Borrower shall enter into
any other contract or agreement for the borrowing of money in excess of the
aggregate amount of Five Million Dollars ($5,000,000), wherein the covenants and
agreements contained therein are more restrictive than the covenants set forth
herein, then Borrower shall be bound hereunder by such covenants and agreements
with the same force and effect as if such covenants and agreements were written
herein.

     SECTION 5.25.  GUARANTY OF SUBORDINATED INDEBTEDNESS. No Company shall be
or become a Guarantor of the Subordinated Indebtedness under the Indenture or
any Note (as defined in the Indenture) executed in connection therewith unless
such Company is also a Pledgor hereunder.

     SECTION 5.26.  POST CLOSING MORTGAGED REAL PROPERTY COVENANTS.

     (a)  (i) If, in the opinion of Agent, any title commitment provided by
Borrower to Agent in connection with any Mortgaged Real Property discloses title
conditions that Agent determines, in its reasonable discretion, may materially
impact the value of such Mortgaged Real Property or Agent's ability to realize
(after an Event of Default) on such Mortgaged Real Property, or (ii) upon
request of Agent after the occurrence of an Event of Default, Borrower shall
provide to Agent with respect to such Mortgaged Real Property, or such thereof
as Agent, in its reasonable discretion, may require, at Borrower's cost and
expense, a Loan Policy of title insurance, ALTA 1970 Form B (amended 10/17/70
and 10/17/84) issued by Chicago Title Insurance Company (collectively, the "Loan
Policies" and individually, a "Loan Policy") in an amount equal to the fair
market value of such Mortgaged Real Property insuring each mortgage or deed of
trust, as appropriate, to be a valid first priority lien on such Mortgaged Real
Property, free and clear of all defects and encumbrances except such matters of
record as are acceptable to Agent, in its reasonable discretion, with such
endorsements and affirmative insurance as Agent, in its reasonable discretion,
may require. If Agent shall require Borrower to deliver a Loan Policy of Title
Insurance for any or all of the Mortgaged Real Property, Agent shall notify
Borrower in writing of such requirement, the reason therefore, and the specific
Mortgaged Real Property for which a Loan Policy of Title Insurance is being
requested and Borrower shall, within thirty (30) days after receipt of such
written notice, deliver the required Loan Policy or Loan Policies to Agent.

                                       38
<PAGE>

     (b)  If, in the opinion of Agent, either (i) any information provided by
Borrower with respect to any Mortgaged Real Property indicates or suggests the
existence of an environmental condition or a potential environmental condition
on such Mortgaged Real Property that requires further inquiry or study, or (ii)
Borrower fails or is unable to provide any relevant environmental information
regarding the environmental condition of any Mortgaged Real Property, Borrower
shall provide to Agent with respect to each Mortgaged Real Property, or such
thereof as Agent, in its reasonable discretion, may require, at Borrower's cost
and expense, environmental reports or studies prepared by environmental
engineering firms acceptable to Agent (the "Reports"), which Reports shall be in
form and substance acceptable to Agent, in its sole discretion. If Agent shall
require Borrower to deliver the Reports, Agent shall notify Borrower in writing
of such requirement, the reason therefore, and the type of environmental report
or study required, and Borrower shall, within sixty (60) days after receipt of
such notice, deliver the required Reports to Agent.

     (c)  If Agent shall determine that there is any question or dispute
regarding any boundary of any Mortgaged Real Property, or any part thereof, that
may materially impact the value of such Mortgaged Real Property or Agent's
ability to realize on such Mortgaged Real Property upon the occurrence of an
Event of Default, then, within thirty (30) days after Borrower's receipt of a
request from Agent, Borrower shall initiate such action as Borrower deems
appropriate to cure the dispute (to Agent's reasonable satisfaction) and provide
Agent with periodic updates (and as may be requested by Agent) as to the status
of the disputed boundary.

     (d)  If Agent shall determine that there is any question or dispute as to
the zoning of any Mortgaged Real Property, or any part thereof, that may
materially impact the value of such Mortgaged Real Property or Agent's ability
to realize on such Mortgaged Real Property upon the occurrence of an Event of
Default, then, within thirty (30) days after Borrower's receipt of a request
from Agent, Borrower shall provide evidence satisfactory to Agent that Borrower
has initiated and is diligently proceeding to comply with all building and
zoning codes applicable to such Mortgaged Real Property, or such thereof as
Agent may require; provided that in no event shall Borrower fail to be in
compliance more than one hundred fifty (150) days after receipt of such request
from Agent.

     SECTION 5.27. INTEREST RATE PROTECTION. Borrower shall maintain Interest
Rate Protection at all times with respect to at least fifty percent (50%) of
Borrower's Total Senior Funded Indebtedness, on terms and conditions
satisfactory to Agent.


                 ARTICLE VI. REPRESENTATIONS AND WARRANTIES

     Borrower represents and warrants that the statements set forth in this
Article VI are true, correct and complete.

                                       39
<PAGE>

     SECTION 6.1. CORPORATE EXISTENCE; FOREIGN QUALIFICATION; SUBSIDIARIES.

     (a)  Each Company is a corporation duly organized, validly existing, and in
good standing under the laws of its state of incorporation and is duly qualified
and authorized to do business and is in good standing as a foreign corporation
in each jurisdiction where the character of its property or its business
activities makes such qualification necessary, except where the failure to so
qualify will not cause or result in a material adverse effect on the business,
operations or condition (financial or otherwise) of such Company.

     (b)  Schedule 6.1 hereto sets forth (i) the state of organization of
          ------------
Borrower, and (ii) each state or other jurisdiction in which Borrower is
qualified to do business as a foreign corporation.

     (c)  Schedule 6.1 hereto sets forth (i) each Subsidiary of Borrower and
          ------------
each Subsidiary of each Company, (ii) such Subsidiary's state of incorporation,
(iii) each state or other jurisdiction in which such Subsidiary is qualified to
do business as a foreign corporation, and (iv) the direct or indirect ownership
of Borrower in such Subsidiary.

     SECTION 6.2. CORPORATE AUTHORITY. Each Company has the right and power and
is duly authorized and empowered to enter into, execute and deliver the Loan
Documents to which it is a party and to perform and observe the provisions of
the Loan Documents. The Loan Documents to which each Company is a party have
been duly authorized and approved by such Company's Board of Directors and are
the valid and binding obligations of such Company, enforceable against such
Company in accordance with their respective terms. The execution, delivery and
performance of the Loan Documents will not conflict with nor result in any
breach in any of the provisions of, or constitute a default under, or result in
the creation of any Lien (other than Liens permitted under Section 5.9 of this
Agreement) upon any assets or property of any Company under the provisions of,
such Company's Articles (or Certificate) of Incorporation, Bylaws, Regulations
or any agreement.

     SECTION 6.3. COMPLIANCE WITH LAWS.

     (a)  Each Company holds permits, certificates, licenses, orders,
registrations, franchises, authorizations, and other approvals from federal,
state, local, and foreign governmental and regulatory bodies reasonably
necessary for the conduct of its business and the use, operation and ownership
of the Real Property and is in compliance in all material respects with all
applicable laws relating thereto. Schedule 6.3 hereto sets forth each material
                                  ------------
permit, certificate, license, registration or authorization necessary for the
conduct of each Company's business.

     (b)  Each Company is in compliance in all material respects with all
federal, state, local, or foreign applicable statutes, rules, regulations, and
orders including, without limitation,

                                       40
<PAGE>

those relating to environmental protection, occupational safety and health, and
equal employment practices and the use, operation and ownership of the Real
Property.

     (c)  No Company is in violation of or in default in any material respect
under any agreement to which it is a party or by which its assets are subject or
bound.

     SECTION 6.4. LITIGATION AND ADMINISTRATIVE PROCEEDINGS.  Except as
disclosed on Schedule 6.4 hereto, there are (a) no lawsuits, actions,
             ------------
investigations, or other proceedings pending or threatened against Borrower or
any of its Subsidiaries, or in respect of which Borrower or any of its
Subsidiaries may have any liability, in any court or before any governmental
authority, arbitration board, or other tribunal, (b) no orders, writs,
injunctions, judgments, or decrees of any court or government agency or
instrumentality to which any Company is a party or by which the property or
assets of any Company are bound and (c) no grievances, disputes, or
controversies outstanding with any union or other organization of the employees
of any Company, or threats of work stoppage, strike, or pending demands for
collective bargaining; which, as to subsections (a) through (c) above, if
determined adversely would not have a material adverse effect on the business,
property or operations (financial or otherwise) of any Company.

     SECTION 6.5. LOCATION. Schedule 6.5 hereto sets forth (i) the location
                            ------------
of the chief executive office and the principal place of business of each
Company, (ii) each state or other location where each Company has places of
business or maintains inventory, equipment or records concerning such Company's
accounts, and (iii) each state or other location where each Company owns any
real property.

     SECTION 6.6. DOCUMENTED VESSELS. Schedule 6.6 hereto sets forth each
                                      ------------
Documented Vessel owned by each Company.

     SECTION 6.7. TITLE TO ASSETS. Each Company has good title to and ownership
of all property, including the Real Property, it purports to own or lease
(including leases for or with respect to minerals and mineral rights), which
property is free and clear of all Liens, except those permitted under Section
5.9 hereto.

     SECTION 6.8. LIENS AND SECURITY INTERESTS. On and after the Closing Date,
except for Liens permitted pursuant to Section 5.9 hereof, (a) there is no
financing statement outstanding covering any personal property of any Company,
other than a financing statement in favor of Agent, for the benefit of the
Banks, or Collateral Agent; (b) there is no mortgage outstanding covering any
Real Property of any Company, other than a mortgage in favor of Agent, for the
benefit of the Banks, or Collateral Agent; and (c) no real or personal property
of any Company is subject to any security interest or Lien of any kind other
than any security interest or Lien that may be granted to Agent, for the benefit
of the Banks, or Collateral Agent. No Company has entered into any contract or
agreement that exists on or after the Closing Date that would prohibit Agent,
Collateral Agent or the Banks from acquiring a security interest,

                                       41
<PAGE>

mortgage or other Lien on, or a collateral assignment of, any of the property or
assets of any Company.

     SECTION 6.9. TAX RETURNS. All federal, state and local tax returns and
other reports required by law to be filed in respect of the income, business,
properties and employees of each Company have been filed and all taxes,
assessments, fees and other governmental charges which are due and payable have
been paid, except as otherwise permitted herein or the failure to do so does not
and will not cause or result in a material adverse effect on the business,
operations or condition (financial or otherwise) of such Company. The provision
for taxes on the books of each Company is adequate for all years not closed by
applicable statutes and for the current fiscal year.

     SECTION 6.10.  ENVIRONMENTAL LAWS. Each Company is in material compliance
with any and all Environmental Laws including, without limitation, (a) all
Environmental Laws in all jurisdictions in which any Company owns or operates,
or has owned or operated, a facility or site, arranges for disposal or treatment
of any Hazardous Substance, solid waste or other wastes, accepts or has accepted
for transport any Hazardous Substance, solid waste or other wastes or holds or
has held any interest in real property or otherwise, and (b) all Environmental
Laws relating to permits, licenses, approvals, authorizations, consents and
registrations required for such Company's operation. No litigation or proceeding
arising under, relating to or in connection with any Environmental Law is
pending or, to the best knowledge of each Company, threatened against any
Company, any real property in which any Company holds or has held an interest or
any past or present operation of any Company. To the best of Borrower's
knowledge, no Release, threatened Release or disposal of any Hazardous
Substance, solid waste or other wastes is occurring, or has occurred (other than
those that are currently being cleaned up in accordance with Environmental
Laws), on, under or to any real property in which any Company holds any interest
or performs any of its operations, in violation of any Environmental Law that
would have a material adverse effect on the business, operations or condition
(financial or otherwise) of the Companies taken as a whole. As used in this
Section, "litigation or proceeding" means any written demand, claim, notice,
suit, suit in equity, action, administrative action, investigation or inquiry
whether brought by any governmental authority, private person or entity or
otherwise.

     SECTION 6.11.  CONTINUED BUSINESS. To Borrower's knowledge, there exists no
actual, pending or threatened termination, cancellation or limitation of, or any
modification or change in the business relationship of any Company and any
customer or supplier, or any group of customers or suppliers, whose purchases or
supplies, individually or in the aggregate, are material to the business of any
Company which would have a material adverse effect to the Companies taken as a
whole, and there exists no present condition or state of facts or circumstances
which would materially affect adversely any Company in any respect or prevent a
Company from conducting such business or the transactions contemplated by this
Agreement in substantially the same manner which it was theretofore conducted.

                                       42
<PAGE>

     SECTION 6.12.  EMPLOYEE BENEFITS PLANS. Full payment has been made of all
amounts which a Controlled Group member is required, under applicable law or
under the governing documents, to have been paid as a contribution to or a
benefit under each Plan. The liability of each Controlled Group member with
respect to each Plan has been fully funded based upon reasonable and proper
actuarial assumptions, has been fully insured, or has been fully reserved for on
its financial statements. No changes have occurred or are expected to occur that
would cause a material increase in the cost of providing benefits under the
Plan. With respect to each Plan that is intended to be qualified under Code
Section 401(a): (a) the Plan and any associated trust operationally comply with
the applicable requirements of Code Section 401(a), (b) the Plan and any
associated trust have been amended to comply with all such requirements as
currently in effect, other than those requirements for which a retroactive
amendment can be made within the "remedial amendment period" available under
Code Section 401(b) (as extended under Treasury Regulations and other Treasury
pronouncements upon which taxpayers may rely), (c) the Plan and any associated
trust have received a favorable determination letter from the Internal Revenue
Service stating that the Plan qualifies under Code Section 401(a), that the
associated trust qualifies under Code Section 501(a) and, if applicable, that
any cash or deferred arrangement under the Plan qualifies under Code Section
401(k), unless the Plan was first adopted at a time for which the above-
described "remedial amendment period" has not yet expired, (d) the Plan
currently satisfies the requirements of Code Section 410(b), without regard to
any retroactive amendment that may be made within the above-described "remedial
amendment period", and (e) no contribution made to the Plan is subject to an
excise tax under Code Section 4972. With respect to any Pension Plan, the
"accumulated benefit obligation" of Controlled Group members with respect to the
Pension Plan (as determined in accordance with Statement of Accounting Standards
No. 87, "Employers' Accounting for Pensions") does not exceed the fair market
value of Pension Plan assets, or if it does, it does not have a material adverse
effect on the Companies taken as whole. Neither Borrower nor any Controlled
Group member has had a complete or partial withdrawal from any Multiemployer
Plan which has resulted in material liability to Borrower which has not been
satisfied, and neither Borrower nor any Controlled Group member would become
subject to any material liability under ERISA if Borrower or such Controlled
Group member were to withdraw completely from all such Multiemployer Plans to
which Borrower or any Controlled Member contributes or has an obligation to
contribute.

     SECTION 6.13.  CONSENTS OR APPROVALS. No consent, approval or authorization
of, or filing, registration or qualification with, any governmental authority or
any other Person is required to be obtained or completed by Borrower in
connection with the execution, delivery or performance of any of the Loan
Documents, that has not already been obtained or completed.

     SECTION 6.14.  SOLVENCY. Borrower has received consideration that is the
reasonable equivalent value of the obligations and liabilities that Borrower has
incurred to the Banks. Borrower is not insolvent as defined in any applicable
state or federal statute, nor will Borrower be rendered insolvent by the
execution and delivery of the Loan Documents to Agent and the Banks. Borrower is
not engaged or about to engage in any business or transaction for

                                       43
<PAGE>

which the assets retained by it are or will be an unreasonably small amount of
capital, taking into consideration the obligations to Agent and the Banks
incurred hereunder. Borrower does not intend to, nor does it believe that it
will, incur debts beyond its ability to pay such debts as they mature.

     SECTION 6.15.  FINANCIAL STATEMENTS. The Consolidated financial statements
of Borrower for the fiscal year ended December 31, 1999, furnished to Agent and
the Banks, are true and complete, have been prepared in accordance with GAAP,
and fairly present the Companies' financial condition as of the dates of such
financial statements and the results of their operations for the periods then
ending. Since the dates of such statements, there has been no material adverse
change in any Company's financial condition, properties or business nor any
change in any Company's accounting procedures.

     SECTION 6.16.  REGULATIONS. Borrower is not engaged principally or as one
of its important activities, in the business of extending credit for the purpose
of purchasing or carrying any "margin stock" (within the meaning of Regulation U
of the Board of Governors of the Federal Reserve System of the United States of
America). Neither the granting of the Loan nor the use of the proceeds of any
part of the Loan will violate, or be inconsistent with, the provisions of
Regulation U or X of said Board of Governors.

     SECTION 6.17.  MATERIAL AGREEMENTS.  Except as disclosed on Schedule 6.17
                                                                 -------------
hereto, no Company is a party to any (a) debt instrument; (b) lease (capital,
operating or otherwise, including leases for Real Property and leases for or
with respect to minerals and mineral rights), whether as lessee or lessor
thereunder; (c) contract, commitment, agreement, or other arrangement involving
the purchase or sale of any inventory by it, or the license of any right to or
by it; (d) contract, commitment, agreement, or other arrangement with any of its
"Affiliates" (as such term is defined in the Securities Exchange Act of 1934, as
amended); (e) management or employment contract or contract for personal
services with any of its Affiliates which is not otherwise terminable at will or
on less than ninety (90) days' notice without liability; (f) collective
bargaining agreement; or (g) other contract, agreement, understanding, or
arrangement which, as to subsections (a) through (g), above, if violated,
breached, or terminated for any reason, would have or would be reasonably
expected to have a material adverse effect on the business, operation or
condition (financial or otherwise) of any Company.

     SECTION 6.18.  INTELLECTUAL PROPERTY. Each Company owns, possesses, or has
the right to use all of the patents, patent applications, trademarks, service
marks, copyrights, licenses, and rights with respect to the foregoing necessary
for the conduct of its business without any known conflict with the rights of
others. Schedule 6.18 hereto sets forth all intellectual property owned by the
        -------------
Companies, setting forth in detail a description of such intellectual property
and the owner thereof.

     SECTION 6.19.  INSURANCE. Each Company maintains with financially sound and
reputable insurers insurance with coverage and limits as required by law and as
is customary with persons engaged in the same businesses as the Companies.
Schedule 6.19 hereto sets forth
-------------

                                       44
<PAGE>

all insurance carried by the Companies, setting forth in detail the amount and
type of such insurance.

     SECTION 6.20.  ACCURATE AND COMPLETE STATEMENTS. Neither the Loan Documents
nor any written statement made by any Company in connection with any of the Loan
Documents contains any untrue statement of a material fact or omits a material
fact necessary to make the statements contained therein or in the Loan Documents
not misleading. After due inquiry by Borrower, there is no known fact which any
Company has not disclosed to Agent and the Banks which has a material adverse
effect on the business, operations or condition (financial or otherwise) of any
Company.

     SECTION 6.21.  REAL PROPERTY.

     (a)  To the knowledge of Borrower, there is no existing, proposed or
contemplated plan, study, or effort by any governmental authority or other
Person that in any way effects or would affect materially and adversely the
continued authorization of the present or contemplated ownership, financing,
construction, use or operation of any part of the Real Property or that could or
will result in any tax or other charge being levied or assessed against, or in
the creation of any Lien upon, any part of the Real Property.

     (b)  No Real Property or any portion thereof is affected by any fire,
explosion, accident, drought, storm, hail, earthquake, embargo, act of God or
other casualty (that is not covered by insurance) that has resulted in or would
reasonably be likely to result in a material adverse effect on such Real
Property.

     (c)  No condemnation of any Real Property or any portion thereof is
pending, nor, to the best of Borrower's knowledge is threatened, by any
governmental authority or other Person, except for taking of streets, rights of
way and other similar takings not having any material adverse effect on such
Real Property.

     SECTION 6.22.  INDENTURE.  (a) No Event of Default (as defined in the
Indenture) or Default (as defined in the Indenture) or event or condition that
with the passage of time or the giving of notice or both would constitute a
default or event or default under the Indenture exists, nor will any such Event
of Default, Default, event of default or default exist immediately under the
Indenture, or any agreement executed in connection therewith after the granting
of the Loan; (b) no Company has "incurred" (as defined in the Indenture) any
Designated Senior Indebtedness (as defined in the Indenture), other than the
Debt or the Debt (as defined in the Credit Agreement); (c) all of the Debt
constitutes Senior Indebtedness (as defined in the Indenture) and Designated
Senior Indebtedness (as defined in the Indenture); (d) no Company has "incurred"
(as defined in the Indenture), either prior to or after the granting of the
Loan, any Indebtedness (as defined in the Indenture) in violation of Section
4.06 (Limitation on Additional Indebtedness) of the Indenture; and (e) the Fixed
Charge Coverage Ratio Condition does not exist and, within the next three (3)
months, is not likely to exist, based upon the quarterly financial forecasts
delivered pursuant to Section 5.3(f) hereof.

                                       45
<PAGE>

     SECTION 6.23.  DEFAULTS. No Unmatured Event of Default or Event of Default
exists hereunder, nor will any begin to exist immediately after the execution
and delivery hereof.


                       ARTICLE VII.   EVENTS OF DEFAULT

     Each of the following shall constitute an Event of Default hereunder:

     SECTION 7.1.   PAYMENTS. If (a) the principal of any Note shall not be paid
in full punctually when due and payable, or (b) the interest on any Note or any
fee shall not be paid in full punctually when due and payable or within five (5)
Business Days thereafter.

     SECTION 7.2.   SPECIAL COVENANTS. If any Company or any Obligor shall fail
or omit to perform and observe Sections 5.7, 5.12, 5.18, 5.20 or 5.21 hereof.

     SECTION 7.3.   OTHER COVENANTS. If any Company or any Obligor shall fail or
omit to perform and observe any agreement or other provision (other than those
referred to in Sections 7.1 or 7.2 hereof) contained or referred to in this
Agreement or any Related Writing that is on such Company's or Obligor's part, as
the case may be, to be complied with, and that Unmatured Event of Default shall
not have been fully corrected within thirty (30) days after the giving of
written notice thereof to Borrower by Agent or any Bank that the specified
Unmatured Event of Default is to be remedied.

     SECTION 7.4.   REPRESENTATIONS AND WARRANTIES. If any representation,
warranty or statement made in or pursuant to this Agreement or any Related
Writing or any other material information furnished by any Company or any
Obligor to the Banks or any thereof or any other holder of any Note, shall be
false or erroneous in any material respect.

     SECTION 7.5.   CROSS DEFAULT. If any Company or any Obligor shall default
in the payment of principal or interest due and owing upon any other obligation
for borrowed money in excess of the aggregate, for all such obligations for all
such Companies and Obligors, of Five Million Dollars ($5,000,000) beyond any
period of grace provided with respect thereto or in the performance or
observance of any other agreement, term or condition contained in any agreement
under which such obligation is created, if the effect of such default is to
allow the acceleration of the maturity of such Indebtedness or to permit the
holder thereof to cause such Indebtedness to become due prior to its stated
maturity.

     SECTION 7.6.  ERISA DEFAULT.  The occurrence of one or more ERISA Events
that (a) the Majority Banks determine could have a material adverse effect on
the financial condition of the Companies when taken as a whole, or (b) results
in a Lien on any of the assets of any Company in excess of Two Million Five
Hundred Thousand Dollars ($2,500,000).

     SECTION 7.7.  CHANGE IN CONTROL. If a Change in Control shall occur.

                                       46
<PAGE>

     SECTION 7.8.   MONEY JUDGMENT. A final judgment or order for the payment of
money shall be rendered against any Company or any Obligor by a court of
competent jurisdiction, which remains unpaid or unstayed and undischarged for a
period (during which execution shall not be effectively stayed) of thirty (30)
days after the date on which the right to appeal has expired, provided that the
aggregate of all such judgments for all such Companies and Obligors not covered
by any form of insurance (which coverage shall be proved to the satisfaction of
Agent) shall exceed One Million Five Hundred Thousand Dollars ($1,500,000).

     SECTION 7.9.   MATERIAL ADVERSE CHANGE. There shall have occurred any
condition or event which Agent or the Majority Banks determine has or is
reasonably likely to have a material and adverse effect on the business,
prospects, operations or financial condition of Borrower or any of its
Subsidiaries or on the rights and remedies of Agent or the Banks under the Loan
Documents or the ability of Borrower or any of its Subsidiaries to perform their
respective obligations under the Loan Documents.

     SECTION 7.10.  VALIDITY OF LOAN DOCUMENTS. (a) Any material provision, in
the sole opinion of Agent, of any Loan Document shall at any time for any reason
cease to be valid and binding and enforceable against Borrower or any Pledgor;
(b) the validity, binding effect or enforceability of any Loan Document against
Borrower or any Pledgor shall be contested by any Company or any other Obligor;
(c) Borrower or any Pledgor shall deny that it has any or further liability or
obligation thereunder; or (d) any Loan Document shall be terminated, invalidated
or set aside, or be declared ineffective or inoperative or in any way cease to
give or provide to Agent and the Banks the benefits purported to be created
thereby.

     SECTION 7.11.  SOLVENCY.  If Borrower or any Pledgor shall (a) discontinue
business, (b) generally not pay its debts as such debts become due, (c) make a
general assignment for the benefit of creditors, (d) apply for or consent to the
appointment of a receiver, a custodian, a trustee, an interim trustee or
liquidator of all or a substantial part of its assets, (e) be adjudicated a
debtor or have entered against it an order for relief under Title 11 of the
United States Code, as the same may be amended from time to time, (f) file a
voluntary petition in bankruptcy or file a petition or an answer seeking
reorganization or an arrangement with creditors or seeking to take advantage of
any other law (whether federal or state) relating to relief of debtors, or admit
(by answer, by default or otherwise) the material allegations of a petition
filed against it in any bankruptcy, reorganization, insolvency or other
proceeding (whether federal or state) relating to relief of debtors, (g) suffer
or permit to continue unstayed and in effect for thirty (30) consecutive days
any judgment, decree or order entered by a court of competent jurisdiction,
which approves a petition seeking its reorganization or appoints a receiver,
custodian, trustee, interim trustee or liquidator of all or a substantial part
of its assets, or (h) take, or omit to take, any action in order thereby to
effect any of the foregoing.

     SECTION 7.12.  INDENTURE. If (a) any Event of Default (as defined in the
Indenture), or any event or condition that with the lapse of time or the giving
of notice or both would constitute an Event of Default (as defined in the
Indenture), shall exist under the Indenture

                                       47
<PAGE>

or any agreement executed in connection therewith; (b) without the prior written
consent of Agent and the Majority Banks, the Indenture shall be amended,
supplemented (other than to add a guarantor thereunder), restated or modified in
any respect; (c) the Indebtedness incurred in connection with the Indenture
shall be accelerated for any reason; (d) any Company incurs (as defined in the
Indenture) any Designated Senior Indebtedness (as defined in the Indenture)
other than the Debt or the Debt (as defined in the Credit Agreement); (e) any
part of the Debt shall cease to constitute Senior Indebtedness (as defined in
the Indenture) or Designated Senior Indebtedness (as defined in the Indenture);
or (f) Borrower shall exercise any rights of optional redemption, defeasance,
covenant defeasance or similar right under the Subordination Note Purchase
Agreement.

     SECTION 7.13.  CREDIT AGREEMENT.  The occurrence of any Event of Default
(as defined in the Credit Agreement) under the Credit Agreement.


                     ARTICLE VIII. REMEDIES UPON DEFAULT

     Notwithstanding any contrary provision or inference herein or elsewhere,
     SECTION 8.1. OPTIONAL DEFAULTS . If any Event of Default referred to in
Section 7.1, 7.2., 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 7.10, 7.12 or 7.13 hereof
shall occur, the Majority Banks shall have the right, in their discretion, by
directing Agent, on behalf of the Banks, to give written notice to Borrower, to
accelerate the maturity of all of the Debt (if the Debt is not already due and
payable), whereupon all of the Debt shall become and thereafter be immediately
due and payable in full without any presentment or demand and without any
further or other notice of any kind, all of which are hereby waived by Borrower.

     SECTION 8.2.   AUTOMATIC DEFAULTS. If any Event of Default referred to in
Section 7.11 hereof shall occur the principal of and interest then outstanding
on all Notes, and all of the Debt to the Banks, shall thereupon become and
thereafter be immediately due and payable in full (if the Debt is not already
due and payable), all without any presentment, demand or notice of any kind,
which are hereby waived by Borrower.

     SECTION 8.3.  OFFSETS. If there shall occur or exist any Event of Default
referred to in Section 7.11 hereof or if the maturity of the Notes is
accelerated pursuant to Section 8.1 or 8.2 hereof, each Bank shall have the
right at any time to set off against, and to appropriate and apply toward the
payment of, any and all Debt then owing by Borrower to that Bank (including,
without limitation, any participation purchased or to be purchased pursuant to
Section 8.4 hereof), whether or not the same shall then have matured, any and
all deposit balances and all other indebtedness then held or owing by that Bank
to or for the credit or account of Borrower, all without notice to or demand
upon Borrower or any other Person, all such notices and demands being hereby
expressly waived by Borrower.

     SECTION 8.4.  EQUALIZATION PROVISION. Each Bank agrees with the other Banks
that if it, at any time, shall obtain any Advantage over the other Banks or any
thereof in respect

                                       48
<PAGE>

of the Debt (except under Article III hereof), it shall purchase from the other
Banks, for cash and at par, such additional participation in the Debt as shall
be necessary to nullify the Advantage. If any such Advantage resulting in the
purchase of an additional participation as aforesaid shall be recovered in whole
or in part from the Bank receiving the Advantage, each such purchase shall be
rescinded, and the purchase price restored (but without interest unless the Bank
receiving the Advantage is required to pay interest on the Advantage to the
Person recovering the Advantage from such Bank) ratably to the extent of the
recovery. Each Bank further agrees with the other Banks that if it at any time
shall receive any payment for or on behalf of Borrower on any indebtedness owing
by Borrower to that Bank by reason of offset of any deposit or other
indebtedness, it will apply such payment first to any and all Debt owing by
Borrower to that Bank (including, without limitation, any participation
purchased or to be purchased pursuant to this Section or any other Section of
this Agreement). Borrower agrees that any Bank so purchasing a participation
from the other Banks or any thereof pursuant to this Section may exercise all
its rights of payment (including the right of set-off) with respect to such
participation as fully as if such Bank was a direct creditor of Borrower in the
amount of such participation.


                            ARTICLE IX.   THE AGENT


     The Banks authorize KeyBank National Association and KeyBank National
Association hereby agrees to act as agent for the Banks in respect of this
Agreement upon the terms and conditions set forth elsewhere in this Agreement,
and upon the following terms and conditions:

     SECTION 9.1.   APPOINTMENT AND AUTHORIZATION.  Each Bank hereby irrevocably
appoints and authorizes Agent to take such action as agent on its behalf and to
exercise such powers hereunder as are delegated to Agent by the terms hereof,
together with such powers as are reasonably incidental thereto, including,
without limitation, to execute and deliver the Intercreditor Agreement on behalf
of the Banks. Neither Agent nor any of its affiliates, directors, officers,
attorneys or employees shall be liable for any action taken or omitted to be
taken by it or them hereunder or in connection herewith, except for its or their
own gross negligence or willful misconduct. Each Bank, by its signature to this
Agreement, agrees to be bound by and subject to the terms and conditions of the
Intercreditor Agreement as if it were an original party thereto.

     SECTION 9.2.   NOTE HOLDERS.  Agent may treat the payee of any Note as the
holder thereof until written notice of transfer shall have been filed with it,
signed by such payee and in form satisfactory to Agent.

     SECTION 9.3.   CONSULTATION WITH COUNSEL.  Agent may consult with legal
counsel selected by it and shall not be liable for any action taken or suffered
in good faith by it in accordance with the opinion of such counsel.

     SECTION 9.4.   DOCUMENTS.  Agent shall not be under any duty to examine
into or pass upon the validity, effectiveness, genuineness or value of any Loan
Documents or any other

                                       49
<PAGE>

Related Writing furnished pursuant hereto or in connection herewith or the value
of any collateral obtained hereunder, and Agent shall be entitled to assume that
the same are valid, effective and genuine and what they purport to be.

     SECTION 9.5.   AGENT AND AFFILIATES. With respect to the Loan, Agent shall
have the same rights and powers hereunder as any other Bank and may exercise the
same as though it were not Agent, and Agent and its affiliates may accept
deposits from, lend money to and generally engage in any kind of business with
any Company or any affiliate thereof. Neither Documentation Agent nor
Syndication Agent shall have any right, power, obligation, liability,
responsibility or duty under this Agreement other than those applicable to such
Bank as a Bank hereunder.

     SECTION 9.6.   KNOWLEDGE OF DEFAULT.  It is expressly understood and agreed
that Agent shall be entitled to assume that no Unmatured Event of Default or
Event of Default has occurred and is continuing, unless Agent has been notified
by a Bank or a Company in writing that such Bank or Company, as the case may be,
believes that an Unmatured Event of Default or Event of Default has occurred and
is continuing and specifying the nature thereof.

     SECTION 9.7.   ACTION BY AGENT.  So long as Agent shall be entitled,
pursuant to Section 9.6 hereof, to assume that no Unmatured Event of Default or
Event of Default shall have occurred and be continuing, Agent shall be entitled
to use its discretion with respect to exercising or refraining from exercising
any rights that may be vested in it by, or with respect to taking or refraining
from taking any action or actions that it may be able to take under or in
respect of, this Agreement. Agent shall incur no liability under or in respect
of this Agreement by acting upon any notice, certificate, warranty or other
paper or instrument believed by it to be genuine or authentic or to be signed by
the proper party or parties, or with respect to anything that it may do or
refrain from doing in the reasonable exercise of its judgment, or that may seem
to it to be necessary or desirable in the premises.

     SECTION 9.8.   NOTICES, DEFAULT, ETC.  In the event that Agent shall have
acquired actual knowledge of any Unmatured Event of Default or Event of Default,
Agent shall promptly notify the Banks and shall take such action and assert such
rights under this Agreement as the Majority Banks shall direct and Agent shall
inform the other Banks in writing of the action taken. Agent may take such
action and assert such rights as it deems to be advisable, in its discretion,
for the protection of the interests of the holders of the Notes.

     SECTION 9.9.   INDEMNIFICATION OF AGENT.  The Banks agree to indemnify
Agent and Collateral Agent (to the extent not reimbursed by Borrower) ratably,
according to their respective Term Loan Commitment Percentages, from and against
any and all liabilities, obligations, losses, damages, penalties, actions,
judgments, suits, costs, expenses or disbursements of any kind or nature
whatsoever that may be imposed on, incurred by or asserted against Agent, in its
capacity as agent, or Collateral Agent, in its capacity as collateral agent, in
any way relating to or arising out of this Agreement, the Intercreditor
Agreement or any Loan Document or any action taken or omitted by Agent or
Collateral Agent with respect to this

                                       50
<PAGE>

Agreement, the Intercreditor Agreement or any Loan Document, provided that no
Bank shall be liable for any portion of such liabilities, obligations, losses,
damages, penalties, actions, judgments, suits, costs, expenses (including
attorneys' fees) or disbursements resulting from the gross negligence or willful
misconduct of Agent or Collateral Agent or from any action taken or omitted by
Agent or Collateral Agent in any capacity other than as agent or collateral
agent, as the case may be, under this Agreement or the Intercreditor Agreement.

     SECTION 9.10.  SUCCESSOR AGENT.  Agent may resign as agent hereunder by
giving not fewer than thirty (30) days prior written notice to Borrower and the
Banks. If Agent shall resign under this Agreement, then either (a) the Majority
Banks shall appoint from among the Banks a successor agent for the Banks (with
the consent of Borrower so long as an Event of Default has not occurred and
which consent shall not be unreasonably withheld), or (b) if a successor agent
shall not be so appointed and approved within the thirty (30) day period
following Agent's notice to the Banks of its resignation, then Agent shall
appoint a successor agent that shall serve as agent until such time as the
Majority Banks appoint a successor agent. Upon its appointment, such successor
agent shall succeed to the rights, powers and duties as agent, and the term
"Agent" shall mean such successor effective upon its appointment, and the former
agent's rights, powers and duties as agent shall be terminated without any other
or further act or deed on the part of such former agent or any of the parties to
this Agreement.


                          ARTICLE X. MISCELLANEOUS

     SECTION 10.1.  BANKS' INDEPENDENT INVESTIGATION.  Each Bank, by its
signature to this Agreement, acknowledges and agrees that neither Agent nor
Collateral Agent has made any representation or warranty, express or implied,
with respect to the creditworthiness, financial condition, or any other
condition of any Company or with respect to the statements contained in any
information memorandum furnished in connection herewith or in any other oral or
written communication between Agent or Collateral Agent and such Bank. Each Bank
represents that it has made and shall continue to make its own independent
investigation of the creditworthiness, financial condition and affairs of the
Companies in connection with the extension of credit hereunder, and agrees that
neither Agent nor Collateral Agent has any duty or responsibility, either
initially or on a continuing basis, to provide any Bank with any credit or other
information with respect thereto (other than such notices as may be expressly
required to be given by Agent or Collateral Agent to the Banks hereunder),
whether coming into its possession before the granting of the Loan hereunder or
at any time or times thereafter. Each Bank further represents that it has
reviewed each of the Loan Documents, including, but not limited to the
Intercreditor Agreement. Each Bank has received a copy of the Indenture and has
reviewed the terms and conditions thereof, including, but limited to, the
conditions relating to the status of the Debt as Designated Senior Indebtedness
(as defined in the Indenture) and Senior Indebtedness (as defined in the
Indenture) under the Indenture. Furthermore, none of the Banks shall be deemed
to have a fiduciary relationship with any other Bank.

                                       51
<PAGE>

     SECTION 10.2.  NO WAIVER; CUMULATIVE REMEDIES.  No omission or course of
dealing on the part of Agent, any Bank or the holder of any Note in exercising
any right, power or remedy hereunder or under any of the Loan Documents shall
operate as a waiver thereof; nor shall any single or partial exercise of any
such right, power or remedy preclude any other or further exercise thereof or
the exercise of any other right, power or remedy hereunder or under any of the
Loan Documents. The remedies herein provided are cumulative and in addition to
any other rights, powers or privileges held by operation of law, by contract or
otherwise.

     SECTION 10.3.  AMENDMENTS, CONSENTS.  No amendment, modification,
termination, or waiver of any provision of any Loan Document nor consent to any
variance therefrom, shall be effective unless the same shall be in writing and
signed by the Majority Banks (except that Agent may consent to the release of
any collateral or other property securing the Debt in an aggregate amount not to
exceed a fair market value of One Million Dollars ($1,000,000) during any fiscal
year of Borrower) and then such waiver or consent shall be effective only in the
specific instance and for the specific purpose for which given. Anything herein
to the contrary notwithstanding, unanimous consent of the Banks shall be
required with respect to (a) any increase in the amount of the Term Loan, (b)
the extension of maturity of the Notes, the payment date of interest thereunder,
or the payment of fees or amounts payable hereunder, (c) any reduction in the
rate of interest on the Notes, or in any amount of principal or interest due on
any Note, or the payment of fees hereunder or any change in the manner of pro
rata application of any payments made by Borrower to the Banks hereunder, (d)
any change in any percentage voting requirement, voting rights, or the Majority
Banks definition in this Agreement, (e) the release of any Pledgor or, except as
set forth in the first sentence of this Section 10.3, of any collateral securing
the Debt or any part thereof, or (f) any amendment to the Intercreditor
Agreement, this Section 10.3 or Section 8.4 hereof. Notice of amendments or
consents ratified by the Banks hereunder shall immediately be forwarded by Agent
to Borrower and each of the Banks. Each Bank or other holder of a Note shall be
bound by any amendment, waiver or consent obtained as authorized by this
Section, regardless of its failure to agree thereto.

     SECTION 10.4.  NOTICES. All notices, requests, demands and other
communications provided for hereunder shall be in writing and, if to Borrower,
mailed or delivered to it, addressed to it at the address specified on the
signature pages of this Agreement (including a courtesy notice to the General
Counsel of Borrower, provided that a failure to give such additional notice
shall have no legal effect), if to a Bank, mailed or delivered to it, addressed
to the address of such Bank specified on the signature pages of this Agreement,
or, as to each party, at such other address as shall be designated by such party
in a written notice to each of the other parties. All notices, statements,
requests, demands and other communications provided for hereunder shall be given
by overnight delivery or first class mail with postage prepaid by registered or
certified mail, addressed as aforesaid, or sent by facsimile with telephonic
confirmation of receipt, except that all notices hereunder shall not be
effective until received.

     SECTION 10.5.  COSTS, EXPENSES AND TAXES. Borrower agrees to pay on demand
all costs and expenses of Agent, and all Related Expenses, including, but not
limited to,

                                       52
<PAGE>

(a) administration, travel and out-of-pocket expenses, including but not limited
to attorneys' fees and expenses, of Agent in connection with the preparation,
negotiation and closing of the Loan Documents and the administration of the Loan
Documents, the collection and disbursement of all funds hereunder and the other
instruments and documents to be delivered hereunder, (b) extraordinary out-of-
pocket expenses of Agent in connection with the administration of the Loan
Documents and the other instruments and documents to be delivered hereunder, (c)
all costs and expenses, including reasonable attorneys' fees in connection with
the syndication of the Term Loan Commitments and the Loan, and (d) the
reasonable fees and out-of-pocket expenses of special counsel for Agent, with
respect to the foregoing, and of local counsel, if any, who may be retained by
said special counsel with respect thereto. Borrower also agrees to pay on demand
all costs and expenses of Agent, Collateral Agent and the Banks, including
reasonable attorneys' fees, in connection with the restructuring or enforcement
of the Debt, this Agreement or any Related Writing. In addition, Borrower shall
pay any and all stamp and other taxes and fees payable or determined to be
payable in connection with the execution and delivery of the Loan Documents, and
the other instruments and documents to be delivered hereunder, and agrees to
hold Agent, Collateral Agent and each Bank harmless from and against any and all
liabilities with respect to or resulting from any delay in paying or omission to
pay such taxes or fees.

     SECTION 10.6.  INDEMNIFICATION.  Borrower agrees to defend, indemnify and
hold harmless Agent, Collateral Agent and the Banks from and against any and all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs, expenses (including reasonable attorneys' fees) or disbursements of any
kind or nature whatsoever that may be imposed on, incurred by or asserted
against Agent, Collateral Agent or any Bank in connection with any
investigative, administrative or judicial proceeding (whether or not such Bank,
Collateral Agent or Agent shall be designated a party thereto) or any other
claim by any Person relating to or arising out of this Agreement or any actual
or proposed use of proceeds of the Loan or any of the Debt, or any activities of
any Company or any Obligor or any of their respective Affiliates; provided that
none of Collateral Agent, Agent or any Bank shall have the right to be
indemnified under this Section for its own gross negligence or willful
misconduct as determined by a court of competent jurisdiction. All obligations
provided for in this Section 10.6 shall survive any termination of this
Agreement.

     SECTION 10.7.  OBLIGATIONS SEVERAL; NO FIDUCIARY OBLIGATIONS.  The
obligations of the Banks hereunder are several and not joint. Nothing contained
in this Agreement or any Loan Document and no action taken by Agent or the Banks
pursuant hereto shall be deemed to constitute the Banks a partnership,
association, joint venture or other entity. No default by any Bank hereunder
shall excuse the other Banks from any obligation under this Agreement; but no
Bank shall have or acquire any additional obligation of any kind by reason of
such default. The relationship among Borrower and the Banks with respect to the
Loan Documents and the Related Writings is and shall be solely that of debtor
and creditors, respectively, and none of Agent, Collateral Agent or any Bank has
any fiduciary obligation toward Borrower with respect to any such documents or
the transactions contemplated thereby.

                                       53
<PAGE>

     SECTION 10.8.  EXECUTION IN COUNTERPARTS.  This Agreement may be executed
in any number of counterparts and by facsimile signature and by different
parties hereto in separate counterparts, each of which when so executed and
delivered shall be deemed to be an original and all of which taken together
shall constitute but one and the same agreement.

     SECTION 10.9.  BINDING EFFECT; BORROWER'S ASSIGNMENT. This Agreement shall
become effective when it shall have been executed by Borrower, Agent and by each
Bank and thereafter shall be binding upon and inure to the benefit of Borrower,
Agent and each of the Banks and their respective successors and assigns, except
that Borrower shall not have the right to assign its rights hereunder or any
interest herein without the prior written consent of Agent and all of the Banks.

     SECTION 10.10. BANK ASSIGNMENTS/PARTICIPATIONS.

     A.   Assignments of Term Loan Commitment Amount. Each Bank shall have the
right at any time or times to assign to another financial institution, without
recourse, all or a percentage of all of the following: (a) that Bank's Term Loan
Commitment Amount, and (b) that Bank's Note; provided, however, that, unless
otherwise agreed to in writing by Agent and all of the Banks, no Bank shall
assign to any other financial institution any interest under this Agreement
unless such Bank, simultaneously with such assignment, assigns to the same
financial institution a corresponding percentage interest of such Bank's
Commitment Percentage (as defined in the Credit Agreement) under the Credit
Agreement. Notwithstanding anything in this Agreement, any other Loan Document
or the Credit Agreement to the contrary, unless otherwise agreed to in writing
by Agent and all of the Banks, each Bank under this Agreement shall at all times
be a Credit Agreement Bank under the Credit Agreement and each Bank shall at all
times have the same Term Loan Commitment Percentage under this Agreement as such
Bank's Commitment Percentage under the Credit Agreement.

     In the case of any assignment permitted under this Agreement, the assignor
and the assignee shall comply with the following requirements:

          (i)   Prior Consent. No assignment may be consummated pursuant to this
     Section 10.10 without the prior written consent of Borrower and Agent
     (other than an assignment by any Bank to any affiliate of such Bank which
     affiliate is either wholly-owned by such Bank or is wholly-owned by a
     Person that wholly owns, either directly or indirectly, such Bank), which
     consent of Borrower and Agent shall not be unreasonably withheld; provided,
     however, that, Borrower's consent shall not be required if, at the time of
     the proposed assignment, any Event of Default shall then exist. Anything
     herein to the contrary notwithstanding, any Bank may at any time make a
     collateral assignment of all or any portion of its rights under the Loan
     Documents to a Federal Reserve Bank, and no such assignment shall release
     such assigning Bank from its obligations hereunder;

          (ii)   Minimum Amount. Each such assignment shall be in a minimum
     amount of the lesser of Ten Million Dollars ($10,000,000) of the assignor's
     Term Loan

                                       54
<PAGE>

     Commitment Amount and interest herein or the assignor's entire Term Loan
     Commitment Amount and interest herein;

          (iii)  Assignment Fee; Assignment Agreement.  Unless the assignment
     shall be to an affiliate of the assignor or the assignment shall be due to
     merger of the assignor or for regulatory purposes, either the assignor or
     the assignee shall remit to Agent, for its own account, an administrative
     fee of Three Thousand Five Hundred Dollars ($3,500). Unless the assignment
     shall be due to merger of the assignor or a collateral assignment for
     regulatory purposes, the assignor shall (A) cause the assignee to execute
     and deliver to Borrower and Agent an Assignment Agreement, and (B) execute
     and deliver, or cause the assignee to execute and deliver, as the case may
     be, to Agent such additional amendments, assurances and other writings as
     Agent may reasonably require; and

          (iv)   Non-U.S. Assignee. If the assignment is to be made to an
     assignee which is organized under the laws of any jurisdiction other than
     the United States or any state thereof, the assignor Bank shall cause such
     assignee, at least five (5) Business Days prior to the effective date of
     such assignment, (A) to represent to the assignor Bank (for the benefit of
     the assignor Bank, Agent and Borrower) that under applicable law and
     treaties no taxes will be required to be withheld by Agent, Borrower or the
     assignor with respect to any payments to be made to such assignee in
     respect of the Loan hereunder, (B) to furnish to the assignor (and, in the
     case of any assignee registered in the Register (as defined below), Agent
     and Borrower) either (1) U.S. Internal Revenue Service Form 4224 or U.S.
     Internal Revenue Service Form 1001 or (2) United States Internal Revenue
     Service Form W-8 or W-9, as applicable (wherein such assignee claims
     entitlement to complete exemption from U.S. federal withholding tax on all
     interest payments hereunder), and (C) to agree (for the benefit of the
     assignor, Agent and Borrower) to provide the assignor Bank (and, in the
     case of any assignee registered in the Register, Agent and Borrower) a new
     Form 4224 or Form 1001 or Form W-8 or W-9, as applicable, upon the
     expiration or obsolescence of any previously delivered form and comparable
     statements in accordance with applicable U.S. laws and regulations and
     amendments duly executed and completed by such assignee, and to comply from
     time to time with all applicable U.S. laws and regulations with regard to
     such withholding tax exemption.

     Upon satisfaction of the requirements specified in clauses (i) through (iv)
above, Borrower shall execute and deliver (A) to Agent, the assignor and the
assignee, any consent or release (of all or a portion of the obligations of the
assignor) required to be delivered by Borrower in connection with the Assignment
Agreement, and (B) to the assignee, an appropriate Note.  After delivery of the
new Note or Notes, the assignor's Note being replaced shall be returned to
Borrower marked "replaced".

     Upon satisfaction of the requirements of set forth in (i) through (iv), and
any other condition contained in this Section 10.10A, (A) the assignee shall
become and thereafter be deemed to be a "Bank" for the purposes of this
Agreement, (B) in the event that the assignor's

                                       55
<PAGE>

entire interest has been assigned, the assignor shall cease to be and thereafter
shall no longer be deemed to be a "Bank" and (C) the signature pages hereto and
Schedule 1 hereto shall be automatically amended, without further action, to
----------
reflect the result of any such assignment.

     Agent shall maintain at its address referred to in Section 10.4 hereof a
copy of each Assignment Agreement delivered to it and a register (the
"Register") for the recordation of the names and addresses of the Banks and the
Term Loan Commitment Amount of, and principal amount of the Loan owing to, each
Bank from time to time. The entries in the Register shall be conclusive, in the
absence of manifest error, and Borrower, Agent and the Banks may treat each
financial institution whose name is recorded in the Register as the owner of the
principal amount of the Loan owing to such financial institution recorded
therein for all purposes of this Agreement. The Register shall be available for
inspection by Borrower or any Bank at any reasonable time and from time to time
upon reasonable prior notice.

     B.   Sale of Participations. Each Bank shall have the right at any time or
times, without the consent of Agent or Borrower, to sell one or more
participations or sub-participations to a financial institution, as the case may
be, in all or any part of (a) that Bank's Term Loan Commitment Amount, (b) the
Note delivered to that Bank pursuant to this Agreement, and (c) any
participation, if any, purchased pursuant to Section 8.4 hereof or this Section
10.10B.
     The provisions of Article III and Section 10.6 shall inure to the benefit
of each purchaser of a participation or sub-participation and Agent shall
continue to distribute payments pursuant to this Agreement as if no
participation has been sold.

     If any Bank shall sell any participation or sub-participation, that Bank
shall, as between itself and the purchaser, retain all of its rights (including,
without limitation, rights to enforce against Borrower the Loan Documents and
the Related Writings) and duties pursuant to the Loan Documents and the Related
Writings, including, without limitation, that Bank's right to approve any
waiver, consent or amendment pursuant to Section 10.3, except if and to the
extent that any such waiver, consent or amendment would:

     (i)    reduce any fee or commission allocated to the participation or sub-
            participation, as the case may be,

     (ii)   reduce the amount of any principal payment on the amount of the Loan
            allocated to the participation or sub-participation, as the case may
            be, or reduce the principal amount of the Loan so allocated or the
            rate of interest payable thereon, or

     (iii)  extend the time for payment of any amount allocated to the
            participation or sub-participation, as the case may be.

     No participation or sub-participation shall operate as a delegation of any
duty of the seller thereof. Under no circumstance shall any participation or
sub-participation be deemed a novation in respect of all or any part of the
seller's obligations pursuant to this Agreement.

                                       56
<PAGE>

     SECTION 10.11. SEVERABILITY OF PROVISIONS; CAPTIONS; ATTACHMENTS.  Any
provision of this Agreement that is prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining
provisions hereof or affecting the validity or enforceability of such provision
in any other jurisdiction. The several captions to Sections and subsections
herein are inserted for convenience only and shall be ignored in interpreting
the provisions of this Agreement.  Each schedule or exhibit attached to this
Agreement shall be incorporated herein an shall be deemed to be a part hereof.

     SECTION 10.12. INVESTMENT PURPOSE.  Each of the Banks represents and
warrants to Borrower that it is entering into this Agreement with the present
intention of acquiring any Note issued pursuant hereto for investment purposes
only and not for the purpose of distribution or resale, it being understood,
however, that each Bank shall at all times retain full control over the
disposition of its assets.

     SECTION 10.13. ENTIRE AGREEMENT.  This Agreement, any Note and any other
Loan Document or other agreement, document or instrument attached hereto or
executed on or as of the Closing Date integrate all the terms and conditions
mentioned herein or incidental hereto and supersede all oral representations and
negotiations and prior writings with respect to the subject matter hereof.

     SECTION 10.14. GOVERNING LAW; SUBMISSION TO JURISDICTION.  This
Agreement, each of the Notes and any Related Writing shall be governed by and
construed in accordance with the laws of the State of Ohio and the respective
rights and obligations of Borrower and the Banks shall be governed by Ohio law,
without regard to principles of conflict of laws.  Borrower hereby irrevocably
submits to the non-exclusive jurisdiction of any Ohio state or federal court
sitting in Cleveland, Ohio, over any action or proceeding arising out of or
relating to this Agreement, the Debt or any Related Writing, and Borrower hereby
irrevocably agrees that all claims in respect of such action or proceeding may
be heard and determined in such Ohio state or federal court.  Borrower, on
behalf of itself and its Subsidiaries, hereby irrevocably waives, to the fullest
extent permitted by law, any objection it may now or hereafter have to the
laying of venue in any action or proceeding in any such court as well as any
right it may now or hereafter have to remove such action or proceeding, once
commenced, to another court on the grounds of FORUM NON CONVENIENS or otherwise.
Borrower agrees that a final, nonappealable judgment in any such action or
proceeding shall be conclusive and may be enforced in other jurisdictions by
suit on the judgment or in any other manner provided by law.

     SECTION 10.15. LEGAL REPRESENTATION OF PARTIES.  The Loan Documents were
negotiated by the parties with the benefit of legal representation and any rule
of construction or interpretation otherwise requiring this Agreement or any
other Loan Document to be construed or interpreted against any party shall not
apply to any construction or interpretation hereof or thereof.

                                       57
<PAGE>

     SECTION 10.16. DESIGNATED SENIOR INDEBTEDNESS.  THE INDEBTEDNESS  EVIDENCED
BY THIS AGREEMENT, EACH OF THE NOTES, EACH OF THE SECURITY DOCUMENTS AND EACH
OTHER LOAN DOCUMENT IS AND SHALL AT ALL TIMES CONSTITUTE "DESIGNATED SENIOR
INDEBTEDNESS" UNDER THE PROVISIONS OF THAT CERTAIN INDENTURE, DATED AS OF
FEBRUARY 1, 1999, AS AMENDED, AMONG OGLEBAY NORTON COMPANY, THE GUARANTORS NAMED
THEREIN AND NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, AS TRUSTEE.

                 [Remainder of page intentionally left blank.]

                                       58
<PAGE>

SECTION 10.17.  JURY TRIAL WAIVER. BORROWER, AGENT AND EACH OF THE BANKS WAIVE
ANY RIGHT TO HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING
IN CONTRACT, TORT OR OTHERWISE, AMONG BORROWER, AGENT AND THE BANKS, OR ANY
THEREOF, ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE
RELATIONSHIP ESTABLISHED AMONG THEM IN CONNECTION WITH THIS AGREEMENT OR ANY
NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN
CONNECTION HEREWITH OR THE TRANSACTIONS RELATED THERETO.


<TABLE>
<CAPTION>
<S>          <C>                               <C>                                        <C>
Address:     1100 Superior Avenue              OGLEBAY NORTON COMPANY
             Cleveland, Ohio 44114
             Attention: Treasurer
      By:_______________________________

                                                    Michael F. Biehl, Vice President
                                                    of Finance and Treasurer

Address:     Key Center                        KEYBANK NATIONAL ASSOCIATION,              127
             Cleveland, Ohio 44114-1306
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________


Address:     611 Woodward Avenue               BANK ONE, MICHIGAN
             Detroit, Michigan 48226
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________

Address:     600 Peachtree Street              THE BANK OF NOVA SCOTIA
             Suite 2700
                                                                                          Atl
             Attention: Large Corporate
      Title:____________________________
                    Banking Division

Address:     500 Woodward Avenue, 9th Floor    COMERICA BANK
             Detroit, Michigan 48226
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________


Address:     231 S. LaSalle Street             BANK OF AMERICA, N.A.
             Chicago,Illinois 60697
</TABLE>

                                       59
<PAGE>

<TABLE>
<CAPTION>
<S>          <C>                               <C>                                        <C>
                                                                             [LA]
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________

Address:     111 West Monroe, 10W              HARRIS TRUST AND SAVINGS BANK
             Chicago, Illinois 60603
             Attention: Large Corporate      By:_________________________________
                    Banking Division
      Title:____________________________

Address:     975 Euclid Avenue                 THE HUNTINGTON NATIONAL BANK
             Cleveland, Ohio 44115
                                                                                          Att

Address:     1111 Superior Avenue              MELLON BANK, N.A.
             Suite 1600                        By:_______________________________
             Cleveland, Ohio 44114
             Attention: Large Corporate        Title:____________________________
                    Banking Division
      Title:____________________________

Address:     1900 East Ninth Street            NATIONAL CITY BANK
             Cleveland, Ohio 44114
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________

Address:     250 West Huron                    THE CHASE MANHATTAN BANK
             Cleveland, Ohio 44113
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________

Address:     1404 East Ninth Street            FIFTH THIRD BANK, NORTHEASTERN
             Cleveland, Ohio 44114             OHIO
             Attention: Large Corporate

                                                      Title:_____________________
                                               _______

Address:     1350 Euclid Avenue                FIRSTAR BANK, NATIONAL
             Cleveland, Ohio 44115             ASSOCIATION
             Attention: Large Corporate
</TABLE>

                                       60
<PAGE>

<TABLE>
<CAPTION>
<S>          <C>                               <C>
                                                                             [LA]
                    Banking Division           By:_______________________________
                                        Title:____________________________

Address:     244 Westchester Avenue            FLEET BANK, N.A.
             White Plains, New York 10604
             Attention: Large Corporate        By:_______________________________
                    Banking Division
      Title:____________________________

Address:     110 South Stratford Road          BRANCH BANKING & TRUST CO.
             Suite 301
             Winston-Salem, NC 27104           By:_________________________________
             Attention:  Large Corporate
      Title:____________________________
                    Banking Division
</TABLE>

                                       61
<PAGE>

                                  SCHEDULE 1

                        BANKS AND TERM LOAN COMMITMENTS



<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
                                                                     TERM LOAN                   TERM LOAN
                                                                     COMMITMENT                  COMMITMENT
                   BANKING INSTITUTION                               PERCENTAGE                    AMOUNT
-------------------------------------------------------------------------------------------------------------
<S>                                                                <C>                         <C>
KeyBank National Association                                       10.571428571429%            $12,474,285.71
-------------------------------------------------------------------------------------------------------------
Bank One, Michigan                                                  9.714285714286%            $11,462,857.14
-------------------------------------------------------------------------------------------------------------
The Bank of Nova Scotia                                             9.714285714286%            $11,462,857.14
-------------------------------------------------------------------------------------------------------------
Comerica Bank                                                       8.571428571429%            $10,114,285.71
-------------------------------------------------------------------------------------------------------------
Bank of America, N.A.                                               7.142857142857%            $ 8,428,571.43
-------------------------------------------------------------------------------------------------------------
Harris Trust and Savings Bank                                       7.142857142857%            $ 8,428,571.43
-------------------------------------------------------------------------------------------------------------
The Huntington National Bank                                        7.142857142857%            $ 8,428,571.43
-------------------------------------------------------------------------------------------------------------
Mellon Bank, N.A.                                                   7.142857142857%            $ 8,428,571.43
-------------------------------------------------------------------------------------------------------------
National City Bank                                                  7.142857142857%            $ 8,428,571.43
-------------------------------------------------------------------------------------------------------------
The Chase Manhattan Bank                                            5.714285714286%            $ 6,742,857.14
-------------------------------------------------------------------------------------------------------------
Fifth Third Bank, Northeastern Ohio                                 5.714285714286%            $ 6,742,857.14
-------------------------------------------------------------------------------------------------------------
Firstar Bank, National Association                                  5.714285714286%            $ 6,742,857.14
-------------------------------------------------------------------------------------------------------------
Fleet Bank, N.A.                                                    5.714285714286%            $ 6,742,857.14
-------------------------------------------------------------------------------------------------------------
Branch Banking & Trust Co.                                          2.857142857143%            $ 3,371,428.57
-------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------
Total Commitment Amount:                                                       100%            $  118,000,000
-------------------------------------------------------------------------------------------------------------
</TABLE>





                                  SCHEDULE 2

                            MORTGAGED REAL PROPERTY

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------
Owner                                                   Location
------------------------------------------------------------------------------------
<S>                                             <C>
Oglebay Norton Industrial Sands, Inc.           Glenford, Ohio
------------------------------------------------------------------------------------
Oglebay Norton Industrial Sands, Inc.           Millwood, Ohio
------------------------------------------------------------------------------------
</TABLE>

                                       62
<PAGE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------
Owner                                                   Location
------------------------------------------------------------------------------------
<S>                                             <C>
Texas Mining, LP                                Voca, Texas
------------------------------------------------------------------------------------
Texas Mining, LP                                Brady, Texas
------------------------------------------------------------------------------------
Global Stone Port Inland, Inc. (f.k.a.          Gulliver, Michigan
 Oglebay Norton Limestone Company)
------------------------------------------------------------------------------------
Global Stone Tenn Lutrell Company               Lutrell, Tennessee
------------------------------------------------------------------------------------
Global Stone Chemstone Corporation              Strasburg, Virginia
------------------------------------------------------------------------------------
Global Stone PenRoc LP                          York, Pennsylvania
------------------------------------------------------------------------------------
Global Stone St. Clair Inc.                     Marble City, Oklahoma
------------------------------------------------------------------------------------
Global Stone Chemstone Corporation              Buchanan, Virginia
------------------------------------------------------------------------------------
Global Stone Chemstone Corporation              Middletown, Virginia
------------------------------------------------------------------------------------
Global Stone Filler Products Company            Murray and Gilmer Counties, Georgia
------------------------------------------------------------------------------------
Oglebay Norton Specialty Minerals, Inc.         Kings Mountain, North Carolina
------------------------------------------------------------------------------------
Oglebay Norton Specialty Minerals, Inc.         Velarde, New Mexico
------------------------------------------------------------------------------------
</TABLE>

                                       63
<PAGE>

                                  SCHEDULE 3

                                   PLEDGORS


1.   ONCO Investment Company, a Delaware corporation (in its own capacity and as
     successor by merger to Oglebay Norton Holding Company, an Ohio corporation,
     and as successor by merger to ONCO Investment Company, an Ohio corporation)

2.   ON Marine Services Company, a Delaware corporation (formerly known as
     Oglebay Norton Company)

3.   Oglebay Norton Marine Services Company, L.L.C., a Delaware limited
     liability company

4.   Oglebay Norton Specialty Minerals, Inc., an Ohio corporation (formerly know
     as Oglebay Norton Industrial Minerals, Inc.)

5.   Oglebay Norton Management Company, an Ohio corporation

6.   Oglebay Norton Industrial Sands, Inc., a California corporation (in its own
     capacity and as successor by merger to Colorado Silica Sand, Inc., a
     Colorado corporation)

7.   Texas Mining, LP, a Delaware limited partnership

8.   Oglebay Norton Terminals, Inc., an Ohio corporation

9.   Oglebay Norton Engineered Materials, Inc., an Ohio corporation

10.  Global Stone Corporation, an Ohio corporation (in its own capacity and as
     successor by merger to Oglebay Norton Acquisition Company, a Delaware
     corporation, and successor by merger to Global Stone (USA) Inc., a Delaware
     corporation)

11.  Global Stone Port Inland, Inc., a Michigan corporation (formerly known as
     Oglebay Norton Limestone Company, a Michigan corporation)

12.  Global Stone Tenn Lutrell Company, a Delaware corporation

13.  Global Stone Chemstone Corporation, a Delaware corporation

14.  Global Stone St. Clair, Inc., a Delaware corporation

15.  Global Stone PenRoc, LP, a Pennsylvania limited partnership

16.  GS PC, Inc., a Delaware corporation (successor by merger to Global Stone
     PenRoc, Inc., a Delaware corporation)

                                       64
<PAGE>

17.  Global Stone Filler Products, Inc., a Delaware corporation

18.  Global Stone James River, Inc., a Delaware corporation

19.  Oglebay Norton Minerals, Inc., a Delaware corporation

                                       65
<PAGE>

                                 SCHEDULE 6.6

                              DOCUMENTED VESSELS


<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------
                                                                   Official
Name                 Type                                           Number          Hailing Port
----------------------------------------------------------------------------------------------------------
<S>                  <C>                                       <C>               <C>
Armco                Coastwise Great-Lakes Self-Unloader            265621       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Buckeye              Coastwise Great-Lakes Self-Unloader            264391       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Courtney Burton      Coastwise Great-Lakes Self-Unloader            265246       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Columbia Star        Coastwise Great-Lakes Self-Unloader            635289       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Joseph H. Frantz     Coastwise Great-Lakes Self-Unloader            224409       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Middletown           Coastwise Great-Lakes Self-Unloader            251093       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
David Z. Norton      Coastwise Great-Lakes Self-Unloader            549231       Cleveland, Ohio
----------------------------------------------------------------------------------------------------------
Oglebay Norton       Coastwise Great-Lakes Self-Unloader            592377       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Reserve              Coastwise Great-Lakes Self-Unloader            265360       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
</TABLE>

                                       66
<PAGE>

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------
                                                                   Official
Name                 Type                                           Number          Hailing Port
----------------------------------------------------------------------------------------------------------
<S>                  <C>                                       <C>               <C>
Fred R. White, Jr.   Coastwise Great-Lakes Self-Unloader            606421       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
Wolverine            Coastwise Great-Lakes Self-Unloader            560339       Wilmington, Delaware
----------------------------------------------------------------------------------------------------------
</TABLE>

                                       67
<PAGE>

                                   EXHIBIT A

                                   TERM NOTE

THE INDEBTEDNESS  EVIDENCED BY THIS NOTE, THE LOAN AGREEMENT (AS HEREINAFTER
DEFINED) AND EACH OTHER LOAN DOCUMENT (AS DEFINED IN THE LOAN AGREEMENT) IS AND
SHALL AT ALL TIMES CONSTITUTE "DESIGNATED SENIOR INDEBTEDNESS" UNDER THE
PROVISIONS OF THAT CERTAIN INDENTURE, DATED AS OF FEBRUARY 1, 1999, AS AMENDED,
AMONG OGLEBAY NORTON COMPANY, THE GUARANTORS NAMED THEREIN AND NORWEST BANK
MINNESOTA, NATIONAL ASSOCIATION, AS TRUSTEE.

$________________                                               Cleveland, Ohio
                                                                  April 3, 2000


     FOR VALUE RECEIVED, the undersigned, OGLEBAY NORTON COMPANY ("Borrower")
promises to pay to the order of _________ ("Bank") at the Main Office of KEYBANK
NATIONAL ASSOCIATION, Agent, 127 Public Square, Cleveland, Ohio 44114-1306 the
principal sum of

_______________________________________________________________________  DOLLARS

in lawful money of the United States of America on the Maturity Date, as defined
in the Loan Agreement.  As used herein, "Loan Agreement" means the Loan
Agreement dated as of April 3, 2000, among Borrower, the banks named therein and
KeyBank National Association, as Agent, as the same may from time to time be
amended, restated or otherwise modified. Capitalized terms used herein shall
have the meanings ascribed to them in the Loan Agreement.

     Borrower also promises to pay interest on the unpaid principal amount of
the Loan from time to time outstanding, from the date of the Loan until the
payment in full thereof, at the rates per annum that shall be determined in
accordance with the provisions of Section 2.1 of the Loan Agreement.  Such
interest shall be payable on each date provided for in such Section 2.1;
provided, however, that interest on any principal portion that is not paid when
due shall be payable on demand.

     The portions of the principal sum hereof from time to time representing the
Prime Interest Segment and each LIBOR Interest Segment, and payments of
principal of hereof, shall be shown on the records of Bank by such method as
Bank may generally employ; provided, however, that failure to make any such
entry shall in no way detract from Borrower's obligations under this Note.

     If this Note shall not be paid at maturity, whether such maturity occurs by
reason of lapse of time or by operation of any provision for acceleration of
maturity contained in the Loan Agreement, the principal hereof and the unpaid
interest thereon shall bear interest, until paid, at a

                                       68
<PAGE>

rate per annum equal to the Default Rate. All payments of principal of and
interest on this Note shall be made in immediately available funds.

     This Note is one of the Term Notes referred to in the Loan Agreement.
Reference is made to the Loan Agreement for a description of the right of the
undersigned to anticipate payments hereof, the right of the holder hereof to
declare this Note due prior to its stated maturity, and other terms and
conditions upon which this Note is issued.

     This Note is subject to the provisions of the Intercreditor Agreement and
any holder of this Note, by its acceptance hereof, agrees to be bound by the
provisions of the Intercreditor Agreement as if it were an original party
thereto.  Any holder of this Note shall have the right, at any time, to obtain
from Agent a copy of the Intercreditor Agreement.

     Except as expressly provided in the Loan Agreement, Borrower expressly
waives presentment, demand, protest and notice of any kind.

     JURY TRIAL WAIVER. BORROWER, AGENT AND EACH OF THE BANKS WAIVE ANY RIGHT TO
HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT,
TORT OR OTHERWISE, AMONG BORROWER, AGENT AND THE BANKS, OR ANY THEREOF, ARISING
OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP
ESTABLISHED AMONG THEM IN CONNECTION WITH THIS NOTE OR ANY OTHER INSTRUMENT,
DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH OR THE
TRANSACTIONS RELATED THERETO.

                                          OGLEBAY NORTON COMPANY

                                                Michael F. Biehl, Vice President
                                                of Finance and Treasurer

                                       69
<PAGE>

                                   EXHIBIT B


                        NOTICE OF INTEREST RATE SELECTION



                                          [Date]_______________________, 20____


KeyBank National Association,
as Agent
127 Public Square
Cleveland, Ohio 44114-0616

Attention: ________________

Ladies and Gentlemen:

     The undersigned, OGLEBAY NORTON COMPANY, refers to the Loan Agreement,
dated as of April 3, 2000 ("Loan Agreement", the terms defined therein being
used herein as therein defined), among the undersigned, the Banks, as defined in
the Loan Agreement, and KeyBank National Association, as Agent, and hereby gives
notice, pursuant to Section 2.2 of the Loan Agreement, of the selection of an
interest rate option ("Interest Rate Option") under the Loan Agreement, and in
connection therewith sets forth below the information relating to such request:

     (a) The Business Day of the Interest Rate Option __________, 20__.

     (b) The amount of the Interest Rate Option is $_______________.

     (c) The Interest Rate Option is to be a Prime Rate Option ____ /LIBOR Rate
Option ___.
          (Check one.)

     (d) If the Interest Rate Option is a LIBOR Rate Option, the Interest Period
requested is
          one month ___, two months ___, three months ___, six months ____
          (Check one.)

     The undersigned hereby certifies that the following statements are true on
the date hereof, and will be true on the date that the Interest Rate Option is
to take effect:

          (i) the Fixed Charge Coverage Ratio Condition does not exist and is
     not likely to exist within the next three (3) months, based upon the
     quarterly financial forecasts delivered pursuant to Section 5.3(f) of the
     Loan Agreement;

                                       70
<PAGE>

          (ii)   the representations and warranties contained in each Loan
     Document are correct, before and after giving effect to the Interest Rate
     Option, as though made on and as of such date;

          (iii)  no event has occurred and is continuing, or would result from
     giving effect to such Interest Rate Option that constitutes an Unmatured
     Event of Default or Event of Default; and

          (iv)   the conditions set forth in Section 2.2 and Article IV of the
     Loan Agreement have been satisfied.


                                         Very truly yours,

                                         OGLEBAY NORTON COMPANY

                                         By:____________________________________

                                       71
<PAGE>

                                   EXHIBIT C

                            COMPLIANCE CERTIFICATE




                                             For Fiscal Quarter ended __________


THE UNDERSIGNED HEREBY CERTIFIES THAT:

     (1) I am the duly elected Chief Financial Officer or Treasurer of OGLEBAY
NORTON COMPANY, a Delaware corporation ("Borrower");

     (2) I am familiar with the terms of that certain Loan Agreement, dated as
of April 3, 2000, among the undersigned, the Banks, as defined in the Loan
Agreement, and KeyBank National Association, as Agent (as the same may from time
to time be amended, restated or otherwise modified, the "Loan Agreement", the
terms defined therein and not otherwise defined in this Certificate being used
herein as therein defined), and the terms of the other Loan Documents, and I
have made, or have caused to be made under my supervision, a review in
reasonable detail of the transactions and condition of Borrower and its
Subsidiaries during the accounting period covered by the attached financial
statements;

     (3) The review described in paragraph (2) above did not disclose, and I
have no knowledge of, the existence of any condition or event which constitutes
or constituted an Unmatured Event of Default or Event of Default, at the end of
the accounting period covered by the attached financial statements or as of the
date of this Certificate;

     (4) The representations and warranties made by Borrower contained in each
Loan Document are true and correct as though made on and as of the date hereof;
and,

     (5) Set forth on Attachment I hereto are calculations of the financial
covenants set forth in Section 5.7 and, if applicable, Section 5.18 of the Loan
Agreement, which calculations show compliance with the terms thereof.

     IN WITNESS WHEREOF, the undersigned has signed this certificate the ___ day
of _________, 20___.


                                                   OGLEBAY NORTON COMPANY

                                       72
<PAGE>

                                   EXHIBIT D

                                    FORM OF

                     ASSIGNMENT  AND ACCEPTANCE AGREEMENT



     This Assignment and Acceptance Agreement (this "Assignment Agreement")
between ______________________ (the "Assignor") and ______________________ (the
"Assignee") is dated as of ________, 20_.  The parties hereto agree as follows:

     1.   Preliminary Statement.  Assignor is a party to the Loan Agreement,
          ---------------------
dated as of April 3, 2000 (which, as the same may from time to time be amended,
restated or otherwise modified is herein called the "Loan Agreement"), among
OGLEBAY NORTON COMPANY, ("Borrower"), the banking institutions named on Schedule
                                                                        --------
1 thereto (collectively, "Banks" and, individually, "Bank"), and KEYBANK
-
NATIONAL ASSOCIATION, as agent for the Banks ("Agent").  Capitalized terms used
herein and not otherwise defined herein shall have the meanings attributed to
them in the Loan Agreement.

     2.   Assignment and Assumption.  Assignor hereby sells and assigns to
          -------------------------
Assignee, and Assignee hereby purchases and assumes from Assignor, an interest
in and to Assignor's rights and obligations under the Loan Agreement, effective
as of the Assignment Effective Date (as hereinafter defined), equal to the
percentage interest specified on Annex 1 hereto (hereinafter, "Assignee's
                                 -------
Percentage") of Assignor's right, title and interest in and to (a) the Term Loan
Commitment Amount of Assignor as set forth on Annex 1 (hereinafter, "Assigned
                                              -------
Amount"), (b) any Loan made by Assignor which is outstanding on the Assignment
Effective Date, (c) Assignor's interest in any Loan, as defined in the Loan
Agreement, that is issued and outstanding on the Assignment Effective Date, (d)
any Note delivered to Assignor pursuant to the Loan Agreement, and (e) the Loan
Agreement and the other Related Writings.  After giving effect to such sale and
assignment and on and after the Assignment Effective Date, Assignee shall be
deemed to have a "Term Loan Commitment Percentage" under the Loan Agreement
equal to the Term Loan Commitment Percentage set forth in subpart I.C on Annex 1
                                                                         -------
hereto.

     3.   Assignment Effective Date.  The Assignment Effective Date (the
          -------------------------
"Assignment Effective Date") shall be two (2) Business Days (or such other time
agreed to by Agent) after the following conditions precedent have been
satisfied:

     (a) receipt by Agent of  this Assignment Agreement, including Annex 1
                                                                   -------
hereto, properly executed by Assignor and Assignee and accepted and consented to
by Agent and, if necessary pursuant to the provisions of Section 10.10(A)(i) of
the Loan Agreement, by Borrower;

     (b) receipt by Agent from Assignor of a fee of Three Thousand Five Hundred
Dollars ($3,500), in accordance with Section 10.10A of the Loan Agreement;

                                       73
<PAGE>

     (c) receipt by Agent from Assignee of an administrative questionnaire, or
other similar document, which shall include (i) the address for notices under
the Loan Agreement, (ii) the address of its Lending Office, (iii)  wire transfer
instructions for delivery of funds by Agent, (iv) and such other information as
Agent shall request; and

     (d) receipt by Agent from Assignor or Assignee of any other information
required pursuant to Section 10.10 of the Loan Agreement or otherwise necessary
to complete the transaction contemplated hereby.

     4.  Payment Obligations.  In consideration for the sale and assignment of
         -------------------
Loans hereunder, Assignee shall pay Assignor, on the Assignment Effective Date,
an amount in Dollars equal to Assignee's Percentage.  Any interest, fees and
other payments accrued prior to the Assignment Effective Date with respect to
the Assigned Amount shall be for the account of Assignor.  Any interest, fees
and other payments accrued on and after the Assignment Effective Date with
respect to the Assigned Amount shall be for the account of Assignee.  Each of
Assignor and Assignee agrees that it will hold in trust for the other part any
interest, fees or other amounts which it may receive to which the other party is
entitled pursuant to the preceding sentence and to pay the other party any such
amounts which it may receive promptly upon receipt thereof.

     5.  Credit Determination; Limitations on Assignor's Liability.  Assignee
         ---------------------------------------------------------
represents and warrants to Assignor, Borrower, Agent and the other Banks (a)
that it is capable of making and has made and shall continue to make its own
credit determinations and analysis based upon such information as Assignee
deemed sufficient to enter into the transaction contemplated hereby and not
based on any statements or representations by Assignor, (b) Assignee confirms
that it meets the requirements to be an assignee as set forth in Section 10.10
of the Loan Agreement; (c) Assignee confirms that it is able to fund the Loans
as required by the Loan Agreement; and (d) Assignee agrees that it will perform
in accordance with their terms all of the obligations which by the terms of the
Loan Agreement and the Related Writings are required to be performed by it as a
Bank thereunder.  It is understood and agreed that the assignment and assumption
hereunder are made without recourse to Assignor and that Assignor makes no
representation or warranty of any kind to Assignee and shall not be responsible
for (i) the due execution, legality, validity, enforceability, genuineness,
sufficiency or collectability of the Loan Agreement or any Related Writings,
(ii) any representation, warranty or statement made in or in connection with the
Loan Agreement or any of the Related Writings, (iii) the financial condition or
creditworthiness of Borrower or any Guarantor, (iv) the performance of or
compliance with any of the terms or provisions of the Loan Agreement or any of
the Related Writings, (v) inspecting any of the property, books or records of
Borrower, or (vi) the validity, enforceability, perfection, priority, condition,
value or sufficiency of any collateral securing or purporting to secure the
Loans.  Neither Assignor nor any of its officers, directors, employees, agents
or attorneys shall be liable for any mistake, error of judgment, or action taken
or omitted to be taken in connection with the Loans, the Loan Agreement or the
Related Writings, except for its or their own bad faith or willful misconduct.
Assignee appoints Agent to take such action as agent on its behalf and to
exercise such powers under the Loan Agreement as are delegated to Agent by the
terms thereof.

                                       74
<PAGE>

     6.   Indemnity.  Assignee agrees to indemnify and hold Assignor harmless
          ---------
against any and all losses, cost and expenses (including, without limitation,
attorneys' fees) and liabilities incurred by Assignor in connection with or
arising in any manner from Assignee's performance or non-performance of
obligations assumed under this Assignment Agreement.

     7.   Subsequent Assignments.  After the Assignment Effective Date, Assignee
          ----------------------
shall have the right pursuant to Section 10.10 of the Loan Agreement to assign
the rights which are assigned to Assignee hereunder, provided that (a) any such
subsequent assignment does not violate any of the terms and conditions of the
Loan Agreement, any of the Related Writings, or any law, rule, regulation,
order, writ, judgment, injunction or decree and that any consent required under
the terms of the Loan Agreement or any of the Related Writings has been
obtained, (b) the assignee under such assignment from Assignee shall agree to
assume all of Assignee's obligations hereunder in a manner satisfactory to
Assignor and (c) Assignee is not thereby released from any of its obligations to
Assignor hereunder.

     8.   Reductions of Aggregate Amount of Term Loan.  If any reduction in the
          -------------------------------------------
Total Commitment Amount occurs between the date of this Assignment Agreement and
the Assignment Effective Date, the percentage of the Total Commitment Amount
assigned to Assignee shall remain the percentage specified in Section 1 hereof
and the Term Loan Commitment Amount of Assignee shall be recalculated based on
the reduced Total Commitment Amount.

     9.   Acceptance of Agent.  This Assignment Agreement is conditioned upon
          -------------------
the acceptance and consent of Agent and, if necessary pursuant to Section 10.10A
of the Loan Agreement, upon the acceptance and consent of Borrower.  The
execution of this Assignment Agreement by Agent and, if necessary, by Borrower
is evidence of such acceptance and consent.

     10.  Entire Agreement.  This Assignment Agreement embodies the entire
          ----------------
agreement and understanding between the parties hereto and supersede all prior
agreements and understandings between the parties hereto relating to the subject
matter hereof.

     11.  Governing Law.  This Assignment Agreement shall be governed by the
          -------------
internal law, and not the law of conflicts, of the State of Ohio.

     12.  Notices.  Notices shall be given under this Assignment Agreement in
          -------
the manner set forth in the Loan Agreement.  For the purpose hereof, the
addresses of the parties hereto (until notice of a change is delivered) shall be
the address set forth under each party's name on the signature pages hereof.

                                       75
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Assignment
Agreement by their duly authorized officers as of the date first above written.

                                                ASSIGNOR:

Address:
          ______________________________________

          Fax:__________________________________


                                                ASSIGNEE:

Address:
          ______________________________________

          Fax:__________________________________



Accepted and Consented to this ___ day
of ___, 20__:

KEYBANK NATIONAL ASSOCIATION,
as Agent


By:______________________________________________________
Title:___________________________________________________

Accepted and Consented to this ___ day
of _______, 20__:

OGLEBAY NORTON COMPANY

By:______________________________________________________
Title:___________________________________________________



                                    ANNEX 1
                                      TO
                      ASSIGNMENT AND ACCEPTANCE AGREEMENT

                                       76
<PAGE>

     On and after ___________, 20__ (the "Assignment Effective Date"), the Term
Loan Commitment Amount of Assignee, and, if this is less than an assignment of
all of Assignor's interest, Assignor, shall be as follows:

 I.  ASSIGNEE'S TERM LOAN COMMITMENT AMOUNT

     A.   Assignee's Percentage                 __________%

     B.   Assigned Amount                       $__________

     C.   Assignee's Term Loan Commitment
          Percentage under the Loan Agreement   __________%

 II. ASSIGNOR'S TERM LOAN COMMITMENT AMOUNT

     A.   Assignor's Term Loan Commitment
          Percentage under the Loan Agreement   __________%

     B.   Assignor's Term Loan Commitment
          Amount under the Loan Agreement       $__________


                                   EXHIBIT E

                                    FORM OF

                        INDENTURE TRUSTEE'S CERTIFICATE

     The undersigned, a Responsible Officer, as defined in the Indenture (as

hereinafter defined), refers to the Indenture dated as of February 1, 1999, as

amended by Supplemental Indentures dated March 5, 1999 and April 12, 1999,

respectively, among OGLEBAY NORTON COMPANY, the GUARANTORS named therein and

NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, as Trustee (the "Indenture").  All

capitalized terms used in this certificate have the meanings given to them in

the Indenture unless otherwise defined herein.  The undersigned hereby

certifies, on behalf of the Trustee, as follows:

                                       77
<PAGE>

     1.   As of the date of this certificate the Trustee has received an
          Officers' Certificate from Oglebay Norton Company stating that the
          Company is in compliance with the terms of the Indenture, as amended;

     2,   Since February 1, 1999, the Trustee has not mailed to any Noteholder a
          notice of Default pursuant to Section 7.05 of the Indenture;

     3.   The Trustee is the Registrar under Section 2.04 of the Indenture; and

     4.   Oglebay Norton Company has instructed the Trustee to give notice to
          the Noteholders of the existence of additional Designated Senior
          Indebtedness, and, as the date of this certificate, the Trustee has
          forwarded this notice to the Noteholders based upon such instructions.

     IN WITNESS WHEREOF, the undersigned has executed this Certificate this ___
day of April 2000.
                                          NORWEST BANK MINNESOTA,
                                          NATIONAL ASSOCIATION, as Trustee

                                          Title:

                                   EXHIBIT F

                                    FORM OF

                          GUARANTY OF PAYMENT OF DEBT
                          ---------------------------

     1.   RECITALS.

     OGLEBAY NORTON COMPANY, a Delaware corporation (together with its
successors and assigns, "Borrower"), is entering into the Loan Agreement, as
hereinafter defined, with the financial institutions listed on Schedule 1 to the
Loan Agreement (collectively, together with their respective successors and
assigns, "Banks" and individually, "Bank") and KEYBANK NATIONAL ASSOCIATION, as
administrative agent for the Banks ("Agent").  [________________________], a
[___________] [corporation] [limited liability company] [limited partnership]
("Guarantor"), desires that the Banks grant the financial accommodations to
Borrower as described in the Loan Agreement.

     Guarantor, a subsidiary of Borrower whose financing is provided by the
financial accommodations extended to Borrower through the Loan Agreement and the
other facilities extended to Borrower by Agent and the Banks, deems it to be in
the direct pecuniary and business interests of Guarantor that Borrower obtain
from the Banks the Loan, as hereinafter defined, and other financial
accommodations provided for in the Loan Agreement.

                                       78
<PAGE>

     Guarantor understands that the Banks are willing to grant such financial
accommodations to Borrower only upon certain terms and conditions, one of which
is that Guarantor guarantee the payment of the Debt (as hereinafter defined) and
this Guaranty (as the same may from time to time be amended, restated or
otherwise modified, this "Agreement") is being executed and delivered in
consideration of each financial accommodation granted to Borrower by the Banks
and for other valuable considerations.

     2.   DEFINITIONS.  As used herein, the following terms shall have the
following meanings:

     2.1. "Collateral" shall mean, collectively, all property securing the Debt
or any part thereof at the time in question.

     2.2. "Debt" shall mean, collectively, (a) the Loan; (b) all other
indebtedness now owing or hereafter incurred by Borrower to Agent or any Bank
pursuant to the Loan Agreement and any Note executed in connection therewith;
(c) each renewal, extension, consolidation or refinancing of any of the
foregoing, in whole or in part; (d) all interest from time to time accruing on
any of the foregoing, and all fees and other amounts payable by Borrower to
Agent or any Bank pursuant to the Loan Agreement; (e) all amounts payable by
Borrower to Agent or any Bank pursuant to the Loan Agreement or any Related
Writing; and (f) all Related Expenses.

     2.3. "Loan" shall mean the Term Loan, as defined in the Loan Agreement, and
any other loan, granted pursuant to the Loan Agreement.

     2.4. "Loan Agreement" shall mean the Loan Agreement executed by and among
Borrower, Agent and the Banks and dated as of  April 3, 2000, as the same may
from time to time be amended, restated or otherwise modified.

     2.5. "Obligor" shall mean any Person that, or any of whose property, is or
shall be obligated on the Debt or any part thereof in any manner and includes,
without limiting the generality of the foregoing, Borrower or Guarantor, and any
other co-maker, endorser, guarantor of payment, subordinating creditor,
assignor, grantor of a security interest, pledgor, mortgagor or any hypothecator
of property, if any.

     2.6. "Person" shall mean any individual, sole proprietorship, partnership,
joint venture, unincorporated organization, corporation, limited liability
company, institution, trust, estate, government or other agency or political
subdivision thereof or any other entity.

Except as specifically defined herein, capitalized terms used herein that are
defined in the Loan Agreement shall have their respective meanings ascribed to
them in the Loan Agreement.

                                       79
<PAGE>

     3.   GUARANTY OF DEBT.  Guarantor hereby absolutely and unconditionally
guarantees the prompt payment in full of all of the Debt as and when the
respective parts thereof become due and payable.  If the Debt or any part
thereof shall not be paid in full when due and payable, Agent and the Majority
Banks, in each case, shall have the right to proceed directly against Guarantor
under this Agreement to collect the payment in full of the Debt, regardless of
whether or not Agent and the Majority Banks shall have theretofore proceeded or
shall then be proceeding against Borrower or any other Obligor or Collateral, or
any of the foregoing, it being understood that Agent and the Majority Banks, in
their sole discretion, may proceed against any Obligor and any Collateral, and
may exercise each right, power or privilege that Agent or the Banks may then
have, either simultaneously or separately, and, in any event, at such time or
times and as often and in such order as Agent and the Majority Banks, in their
sole discretion, may from time to time deem expedient to collect the payment in
full of the Debt.

     4.   PAYMENTS CONDITIONAL.  Whenever Agent or any Bank shall credit any
payment to the Debt or any part thereof, whatever the source or form of payment,
the credit shall be conditional as to Guarantor unless and until the payment
shall be final and valid as to all the world.  Without limiting the generality
of the foregoing, Guarantor agrees that if any check or other instrument so
applied shall be dishonored by the drawer or any party thereto, or if any
proceeds of Collateral or payment so applied shall thereafter be recovered by
any trustee in bankruptcy or any other Person, each Bank, in each case, may
reverse any entry relating thereto on its books and Guarantor shall remain
liable therefor, even if such Bank may no longer have in its possession any
evidence of the Debt to which the payment in question was applied.

     5.   GUARANTOR'S OBLIGATIONS ABSOLUTE AND UNCONDITIONAL.  Regardless of the
duration of time, regardless of whether Borrower may from time to time cease to
be indebted to the Banks and irrespective of any act, omission or course of
dealing whatever on the part of Agent or any Bank, Guarantor's liabilities and
other obligations under this Agreement shall remain in full effect until the
payment in full of the Debt.  Without limiting the generality of the foregoing:

     5.1. Banks Have No Duty To Make Advances. No Bank shall at any time be
          ------------------------------------
under any duty to Guarantor to grant any financial accommodation to Borrower,
irrespective of any duty or commitment of any of the Banks to Borrower, or to
follow or direct the application of the proceeds of any such financial
accommodation;

     5.2. Guarantor's Waiver of Notice, Presentment, etc. Guarantor waives (a)
          -----------------------------------------------
notice of the granting of the Loan to Borrower or the incurring of any other
indebtedness by Borrower or the terms and conditions thereof, (b) presentment,
demand for payment and notice of dishonor of the Debt or any part thereof, or
any other indebtedness incurred by Borrower to any of the Banks, (c) notice of
any indulgence granted to any Obligor, and (d) any other notice, to the extent
permitted by statute, to which Guarantor might, but for this waiver, be
entitled;

     5.3. Banks' Rights Not Prejudiced by Action or Omission. Agent and the
          ---------------------------------------------------
Banks, in their sole discretion, may, without any prejudice to their rights
under this Agreement, at any time or times, without notice to or the consent of
Guarantor, (a) grant Borrower whatever financial

                                       80
<PAGE>

accommodations that Agent and the Banks may from time to time deem advisable,
even if Borrower might be in default in any respect and even if those financial
accommodations might not constitute indebtedness the payment of which is
guaranteed hereunder, (b) assent to any renewal, extension, consolidation or
refinancing of the Debt, or any part thereof, (c) forbear from demanding
security, if Agent and the Banks shall have the right to do so, (d) release any
Obligor or Collateral or assent to any exchange of Collateral, if any,
irrespective of the consideration, if any, received therefor, (e) grant any
waiver or consent or forbear from exercising any right, power or privilege that
Agent and the Banks may have or acquire, (f) assent to any amendment, deletion,
addition, supplement or other modification in, to or of any writing evidencing
or securing any Debt or pursuant to which any Debt is created, (g) grant any
other indulgence to any Obligor, (h) accept any Collateral for, or any other
Obligor upon, the Debt or any part thereof, and (i) fail, neglect or omit in any
way to realize upon any Collateral or to protect the Debt or any part thereof or
any Collateral therefor;

     5.4. Liabilities Survive Guarantor's Dissolution. Guarantor's liabilities
          --------------------------------------------
and other obligations under this Agreement shall survive any dissolution of
Guarantor; and

     5.5. Liabilities Absolute and Unconditional. Guarantor's liabilities and
          ---------------------------------------
other obligations under this Agreement shall be absolute and unconditional
irrespective of any lack of validity or enforceability of the Loan Agreement,
the Notes, any Loan Document or any other agreement, instrument or document
evidencing the Loan or related thereto, or any other defense available to
Guarantor in respect of this Agreement.

     6.   REPRESENTATIONS AND WARRANTIES. Guarantor represents and warrants to
Agent and each of the Banks that (a) Guarantor is a duly [incorporated] [formed]
and validly existing [corporation] [limited liability company] [limited
partnership], in [good standing] [full force and effect] under the laws of the
state of its [incorporation] [formation] (as referenced in the first paragraph
of this Agreement), and is qualified to do business in each other state where a
failure to so qualify would have a material adverse effect on Guarantor; (b)
Guarantor has legal power and right to execute and deliver this Agreement and to
perform and observe the provisions hereof; (c) the [officers] [members/managers]
[partners] executing and delivering this Agreement on behalf of Guarantor have
been duly authorized to do so, and this Agreement, when executed, is legal and
binding upon Guarantor in every respect; (d) except for matters described or
referenced in the Loan Agreement or any Schedule thereto, no litigation or
proceeding is pending or threatened against Guarantor before any court or any
administrative agency that, in Guarantor's opinion, after consultation with
Guarantor's counsel, is reasonably expected to have a material adverse effect on
Guarantor; (e) Guarantor has received consideration that is the reasonable
equivalent value of the obligations and liabilities that Guarantor has incurred
to Agent, for the benefit of the Banks; (f) Guarantor is not insolvent, as
defined in any applicable state or federal statute, nor will Guarantor be
rendered insolvent by the execution and delivery of this Agreement to Agent and
the Banks; (g) Guarantor is not engaged or about to engage in any business or
transaction for which the assets retained by Guarantor are or will be an
unreasonably small amount of capital, taking into consideration the obligations
to the Banks incurred hereunder; and (h) Guarantor does not intend to, nor does
Guarantor believe that Guarantor will, incur debts beyond Guarantor's ability to
pay such debts as they mature.

                                       81
<PAGE>

     7.   DISABILITY OF OBLIGOR. Without limiting the generality of any of the
other provisions hereof, Guarantor specifically agrees that upon the dissolution
of any Obligor and/or the filing or other commencement of any bankruptcy or
insolvency proceedings by, for or against any Obligor, including without
limitation, any assignment for the benefit of creditors or other proceedings
intended to liquidate or rehabilitate any Obligor, Agent and the Majority Banks,
in their sole discretion, may declare the unpaid principal balance of and
accrued interest on the Debt to be forthwith due and payable in full without
notice.  Upon the occurrence of any of the events enumerated in the immediately
preceding sentence, Guarantor shall, upon the demand of Agent or the Majority
Banks, whenever made, pay to Agent, for the benefit of the Banks, an amount
equal to the then unpaid principal balance of and accrued interest on the Debt.

     8.   WAIVER OF GUARANTOR'S RIGHTS AGAINST BORROWER AND COLLATERAL.  To the
extent permitted by law, Guarantor waives any claim or other right that
Guarantor might now have or hereafter acquire against Borrower or any other
Obligor that arises from the existence or performance of Guarantor's liabilities
or other obligations under this Agreement, including, without limitation, any
right of subrogation, reimbursement, exoneration, contribution, indemnification,
and any right to participate in any claim or remedy of Agent or any Bank against
Borrower or any Collateral that Agent or any Bank now has or hereafter acquires,
whether or not such claim, remedy or right arises in equity, or under contract,
statute or common law.

     9.   MAXIMUM LIABILITY OF GUARANTOR.

     9.1. Guarantor's Liability Limited in Amount. Subject to subsection 9.5
          ----------------------------------------
hereof, but otherwise notwithstanding anything to the contrary contained in this
Agreement, the maximum liability of Guarantor under this Agreement shall not
exceed the sum of (a) that portion of the Loan the proceeds of which are used by
Borrower to make Valuable Transfers (as hereinafter defined) to Guarantor, plus
(b) ninety-five percent (95%) of the Adjusted Net Worth (as hereinafter
defined), but only to the extent that the Adjusted Net Worth is a positive
number, of Guarantor at the date of this Agreement.

     9.2. Definition of Terms Used in Section 9. For purposes of this Section 9:
          --------------------------------------

          "Adjusted Net Worth" shall mean, as of any date of determination
thereof, the excess of (a) the amount of the fair saleable value (or fair
valuation, if relevant under applicable law) of the assets of Guarantor as of
the date of such determination, determined in accordance with applicable federal
and state laws governing determinations of insolvency of debtors, over (b) the
amount of all liabilities of Guarantor, contingent or otherwise, as of the date
of such determination, determined in accordance with applicable federal and
state law as referenced in the preceding clause (a), and in all events prior to
giving effect to Valuable Transfers.

          "Incurred Amount" shall mean the maximum amount for which Guarantor
may be liable under this Agreement (after giving effect to the incurring of the
obligations under this Agreement and to any rights to contribution of Guarantor
from other affiliates of Borrower)

                                       82
<PAGE>

without rendering the rights to payment hereunder of Agent and the Banks void,
voidable or avoidable under any applicable fraudulent transfer law.

          "Valuable Transfer" shall mean (a) all loans, advances or capital
contributions made to Guarantor with proceeds of the Loan, (b) the fair market
value of all property acquired with proceeds of the Loan and transferred to
Guarantor, (c) the interest on and the fees in respect of the Loan, the proceeds
of which are used to make such a Valuable Transfer, and (d) the value of any
quantifiable economic benefits not included in clauses (a) through (c) above,
but includable in accordance with applicable federal and state laws governing
determinations of the insolvency of debtors, accruing to Guarantor as a result
of the Loan.

     9.3. Debt May Exceed Guarantor's Maximum Liability. Guarantor agrees that
          ----------------------------------------------
the Debt may at any time and from time to time exceed the maximum liability of
Guarantor hereunder without impairing this Agreement or affecting the rights and
remedies of Agent or the Banks hereunder.

     9.4. Guarantor's Liability Not Reduced by Payments by Others. No payment or
          --------------------------------------------------------
payments made by Borrower, Guarantor or any other Person or received or
collected by Agent or the Banks from Borrower, Guarantor or any other Person by
virtue of any action or proceeding or any set-off or appropriation or
application at any time or from time to time in reduction of or in payment of
the Debt shall be deemed to modify, reduce, release or otherwise affect the
liability of Guarantor under this Agreement and Guarantor shall, notwithstanding
any such payment or payments (other than payments made to Agent or the Banks by
Guarantor or payments received or collected by Agent or the Banks from
Guarantor), remain liable for the Debt up to the maximum liability amount of
Guarantor set forth above until the Debt is indefeasibly paid in full in cash.

     9.5. Adjustments to Maximum Liability.  Anything in this Section 9 to the
          ---------------------------------
contrary notwithstanding, in no event shall Guarantor's liability set forth in
subsections 9.1 through 9.4 hereof exceed the Incurred Amount; and further
provided that if a greater amount of the Debt than the maximum liability set
forth in this Section 9, (a) could be repaid by Guarantor as a result of an
increase in Guarantor's Adjusted Net Worth subsequent to the date hereof, and
(b) is equal to or less than the Incurred Amount, then the amount of Guarantor's
maximum liability calculated in subsection 9.1 hereof shall be calculated based
upon Guarantor's Adjusted Net Worth on such later date, rather than the date of
execution of this Agreement.

     10.  NOTICE. All notices, requests, demands and other communications
provided for hereunder shall be in writing and, if to Guarantor, mailed or
delivered to it, addressed to it at the address specified on the signature page
of this Agreement, and, if to a Bank, mailed or delivered to it, addressed to
the address of such Bank specified on the signature pages of the Loan Agreement.
All notices, statements, requests, demands and other communications provided for
hereunder shall be deemed to be given or made when delivered or forty-eight (48)
hours after being deposited in the mails with postage prepaid by registered or
certified mail, addressed as aforesaid, or sent by facsimile with telephonic
confirmation of receipt, except that notices pursuant to any of the provisions
hereof shall not be effective until received.

                                       83
<PAGE>

     11.  MISCELLANEOUS. This Agreement shall bind Guarantor and Guarantor's
successors and assigns and shall inure to the benefit of Agent and each Bank and
their respective successors and assigns, including (without limitation) each
holder of any Note evidencing any Debt. If, at any time, one or more provisions
of this Agreement is or becomes invalid, illegal or unenforceable in whole or in
part, the validity, legality and enforceability of the remaining provisions
shall not in any way be affected or impaired thereby.  This Agreement
constitutes a final written expression of all of the terms of this Agreement, is
a complete and exclusive statement of those terms and supersedes all oral
representations, negotiations and prior writings, if any, with respect to the
subject matter hereof.  The relationship between (a) Guarantor and (b) Agent and
the Banks with respect to this Agreement is and shall be solely that of debtor
and creditors, respectively, and Agent and the Banks shall have no fiduciary
obligation toward Guarantor with respect to this Agreement or the transactions
contemplated hereby.  The captions herein are for convenience of reference only
and shall be ignored in interpreting the provisions of this Agreement.

     12.  GOVERNING LAW; SUBMISSION TO JURISDICTION.  The provisions of this
Agreement and the respective rights and duties of Guarantor, Agent and the Banks
hereunder shall be governed by and construed in accordance with Ohio law,
without regard to principles of conflict of laws. Guarantor hereby irrevocably
submits to the non-exclusive jurisdiction of any Ohio state or federal court
sitting in Cleveland, Ohio, over any action or proceeding arising out of or
relating to this Agreement, any Loan Document or any Related Writing, and
Guarantor hereby irrevocably agrees that all claims in respect of such action or
proceeding may be heard and determined in such Ohio state or federal court.
Guarantor, on behalf of itself and its Subsidiaries, hereby irrevocably waives,
to the fullest extent permitted by law, any objection it may now or hereafter
have to the laying of venue in any action or proceeding in any such court as
well as any right it may now or hereafter have to remove such action or
proceeding, once commenced, to another court on the grounds of FORUM NON
CONVENIENS or otherwise.  Guarantor agrees that a final, nonappealable judgment
in any such action or proceeding shall be conclusive and may be enforced in
other jurisdictions by suit on the judgment or in any other manner provided by
law.

     13.  DESIGNATED SENIOR INDEBTEDNESS.  THE INDEBTEDNESS EVIDENCED BY THIS
AGREEMENT, THE LOAN AGREEMENT, EACH OF THE NOTES, AND EACH OTHER LOAN DOCUMENT
IS AND SHALL AT ALL TIMES CONSTITUTE "DESIGNATED SENIOR INDEBTEDNESS" UNDER THE
PROVISIONS OF THAT CERTAIN INDENTURE, DATED AS OF FEBRUARY 1, 1999, AS AMENDED,
AMONG OGLEBAY NORTON COMPANY, THE GUARANTORS NAMED THEREIN AND NORWEST BANK
MINNESOTA, NATIONAL ASSOCIATION, AS TRUSTEE.

                 [Remainder of page intentionally left blank.]

                                       84
<PAGE>

     14.  JURY TRIAL WAIVER.  Guarantor, Agent and the Banks, to the extent
          -----------------   ---------  ----------------------------------
permitted by law, each waives any right to have a jury participate in resolving
----------------  -------------------------------------------------------------
any dispute, whether sounding in contract, tort, or otherwise, among Agent, any
-----------  ----------------------------  ----  ------------  ----------------
of the Banks, Borrower and/or Guarantor arising out of, in connection with,
------------  ----------------------------------------  ------------------
related to, or incidental to the relationship established between each of them
----------  ------------------------------------------------------------------
and Guarantor in connection with this Agreement or any note or other agreement,
------------------------------------------------------------------------------
instrument or document executed or delivered in connection therewith or the
---------------------------------------------------------------------------
transactions related thereto.
----------------------------

Signed as of the 3rd day of April, 2000, at Cleveland, Ohio.


Address:                                                    1100 Superior Avenue
               Cleveland, Ohio 44114

                                            Title:

                                       85
<PAGE>

                                   EXHIBIT G

                                    FORM OF

                              SECURITY AGREEMENT
                              ------------------

     1.   RECITALS.

     OGLEBAY NORTON COMPANY, a Delaware corporation (together with its
successors and assigns, "Borrower"), is entering into the Loan Agreement, as
hereinafter defined, with the financial institutions listed on Schedule 1 to the
Loan Agreement (collectively, together with their respective successors and
assigns, "Banks" and individually, "Bank") and KEYBANK NATIONAL ASSOCIATION, as
agent for the Banks ("Agent"). [___________________________], a [__________]
[corporation] [limited liability company] [limited partnership] ("Pledgor"),
desires that the Banks grant the financial accommodations to Borrower as
described in the Loan Agreement.

     Pledgor, a subsidiary of Borrower whose financing is provided by the
financial accommodations extended to Borrower through the Loan Agreement and the
other facilities extended to Borrower by Agent and the Banks, deems it to be in
the direct pecuniary and business interests of Pledgor that Borrower obtain from
the Banks the Loan, as hereinafter defined, and other financial accommodations
provided for in the Loan Agreement.

     Pledgor understands that the Banks are willing to grant such financial
accommodations to Borrower only upon certain terms and conditions, one of which
is that Pledgor grant to Agent, for the benefit of the Banks, a security
interest in and an assignment of the Collateral, as hereinafter defined, and
this Security Agreement (as the same may from time to time be amended, restated
or otherwise modified, this "Agreement") is being executed and delivered in
consideration of each financial accommodation granted to Borrower by the Banks
and for other valuable considerations.

     2.   DEFINITIONS.  As used in this Agreement, the following terms shall
have the following meanings:

     "Account" shall mean (a) all accounts, as defined in Chapter 1309 of the
Ohio Revised Code; (b)(i) any right to payment now or hereafter owing to Pledgor
(including but not limited to any such right to payment by reason of any lease,
sale, manufacture, repair, processing or fabrication of personal property
formerly, now or hereafter owned or otherwise held by Pledgor, by reason of any
services formerly, now or hereafter rendered by or on behalf of Pledgor or by
reason of any former, existing or future contract for any such lease, sale,
manufacture, repair, processing, fabrication and/or services), whether such
right to payment be classified by law as an instrument, chattel paper, contract
right, account, document, general intangible or otherwise; (ii) the security, if
any, for such right to payment; (iii) Pledgor's right, title and interest
(including, without limitation, all of Pledgor's rights as an unpaid vendor, and
any applicable right of

                                       86
<PAGE>

stoppage in transit) in or to the personal property, if any, that is the subject
of such right to payment; and (iv) all books and records pertaining to such
right to payment; and (c) all proceeds of any of the foregoing, irrespective of
the form or kind thereof.

     "Account Debtor" shall mean any Person obligated to pay all or any part of
any Account in any manner and includes (without limitation) any guarantor
thereof or other accommodation party therefor.

     "Cash Collateral Account" shall mean a commercial Deposit Account
designated "cash collateral account" and maintained by Pledgor with Agent,
without liability by Agent or the Banks to pay interest thereon, from which
account Agent shall have the exclusive right to withdraw funds until all of the
Debt is paid in full.

     "Cash Security" shall mean all cash, instruments, Deposit Accounts, and
other cash equivalents, whether matured or unmatured, whether collected or in
the process of collection, upon which Pledgor presently has or may hereafter
have any claim, wherever located, including but not limited to any of the
foregoing that are presently or may hereafter be existing or maintained with,
issued by, drawn upon, or in the possession of Agent or any Bank.

     "Collateral" shall mean all of Pledgor's existing and future (a) personal
property; (b) Accounts, accounts receivable, Investment Property, contract
rights, instruments, chattel paper, documents, General Intangibles, Inventory,
Equipment and Mineral Interests; (c) funds now or hereafter on deposit in the
Cash Collateral Account, if any; (d) Cash Security; and (e) Proceeds, products,
profits, and rents of any of (a) through (d) above.

     "Debt" shall mean, collectively, (a) the Loan; (b) all other indebtedness
now owing or hereafter incurred by Borrower to Agent or any Bank pursuant to the
Loan Agreement and any Note executed in connection therewith; (c) each renewal,
extension, consolidation or refinancing of any of the foregoing, in whole or in
part; (d) all interest from time to time accruing on any of the foregoing, and
all fees and other amounts payable by Borrower to Agent or any Bank pursuant to
the Loan Agreement; (e) all obligations and liabilities of Borrower now existing
or hereafter incurred to Agent or any Bank under, arising out of, or in
connection with any Hedge Agreement; (f) all amounts payable by Borrower to
Agent or any Bank pursuant to the Loan Agreement or any Related Writing; and (g)
all Related Expenses.

     "Deposit Account" shall mean (a) any deposit account, and (b) any demand,
time, savings, passbook, or a similar account maintained with a bank, savings
and loan association, credit union, or similar organization.

     "Equipment" shall mean all (a) equipment, as defined in Chapter 1309 of the
Ohio Revised Code, including without limitation, machinery, motor vehicles,
trade fixtures, office and other furniture and furnishings; (b) goods that are
used or bought for use primarily in Pledgor's business; (c) goods that are not
consumer goods, farm products (as defined in Chapter 1309 of the Ohio Revised
Code), or Inventory; and (d) substitutes or replacements for, and parts,
accessories, additions, attachments, or accessions to (a) through (c) above.

                                       87
<PAGE>

     "Event of Default" shall mean an event or condition that constitutes an
Event of Default, as defined in Section 16.1 of this Agreement.

     "General Intangibles" shall mean all (a) general intangibles, as defined in
Chapter 1309 of the Ohio Revised Code; (b) choses in action, causes of action,
customer lists, corporate or other business records, inventions, designs,
patents, patent applications, service marks, registrations, trade names,
trademarks, copyrights, goodwill, computer software, rights to indemnification
and tax refunds; and (c) Proceeds of any of the foregoing, irrespective of the
form or kind thereof.

     "Hedge Agreement" shall mean any currency swap or hedge agreement, interest
rate swap, cap, collar or floor agreement, or other interest rate management
device entered into by Borrower or Original Borrower with Agent or any of the
Banks, or any of their respective affiliates in connection with the Debt.

     "Inventory" shall mean all (a) inventory, as defined in Chapter 1309 of the
Ohio Revised Code; (b) goods that are raw materials; (c) goods that are work-in-
process; (d) goods that are materials used or consumed in the ordinary course of
Pledgor's business; (e) goods that are, in the ordinary course of Pledgor's
business, held for sale or lease or furnished or to be furnished under contracts
of service; and (f) substitutes and replacements for, and parts, accessories,
additions, attachments, or accessions to (a) through (e) above.

     "Investment Property" shall mean all investment property, as defined in
Chapter 1309 of the Ohio Revised Code, unless the Uniform Commercial Code as in
effect in another jurisdiction would govern the perfection and/or priority of a
security interest in investment property, and, in such case, investment property
shall be defined in accordance with the law of that jurisdiction.

     "Loan" shall mean the Term Loan, as defined in the Loan Agreement, and any
other loan granted pursuant to the Loan Agreement.

     "Loan Agreement" shall mean the Loan Agreement executed by and among
Borrower, Agent and the Banks and dated as of April 3, 2000, as the same may
from time to time be amended, restated or otherwise modified.

     "Mineral Interest" shall mean any (a) right of Pledgor to extract minerals
from the ground, (b) minerals that have been extracted from the ground, and (c)
proceeds or payments owing to Pledgor by virtue of the lease or sublease of
mineral rights or the sale of minerals.

     "Person" shall mean any individual, sole proprietorship, partnership, joint
venture, unincorporated organization, corporation, limited liability company,
institution, trust, estate, government or other agency or political subdivision
thereof or any other entity.

     "Proceeds" shall mean (a) any proceeds, and (b) whatever is received upon
the sale, exchange, collection, or other disposition of Collateral or proceeds,
whether cash or non-cash.  Cash proceeds includes, without limitation, moneys,
checks, and Deposit Accounts.  Proceeds

                                       88
<PAGE>

includes, without limitation, any Account arising when the right to payment is
earned under a contract right, any insurance payable by reason of loss or damage
to the Collateral, and any return or unearned premium upon any cancellation of
insurance. Except as expressly authorized in this Agreement, the right of Agent
and the Banks to Proceeds specifically set forth herein or indicated in any
financing statement shall never constitute an express or implied authorization
on the part of Agent or any Bank to Pledgor's sale, exchange, collection, or
other disposition of any or all of the Collateral.

     "Related Expenses" shall mean any and all reasonable costs, liabilities,
and expenses (including, without limitation, losses, damages, penalties, claims,
actions, reasonable attorneys' fees, legal expenses, judgments, suits, and
disbursements) (a) incurred by, imposed upon, or asserted against, Agent or any
Bank in any attempt by Agent or any Bank to (i) obtain, preserve, perfect, or
enforce any security interest evidenced by this Agreement, the Loan Agreement or
any Related Writing, as defined in the Loan Agreement; (ii) obtain payment,
performance, and observance of any and all of the Debt; or (iii) maintain,
insure, audit, collect, preserve, repossess, and dispose of any of the
Collateral or any other collateral securing the Debt, including, without
limitation, costs and expenses for appraisals, assessments, and audits of
Pledgor or any such collateral; or (b) incidental or related to (a) above,
including, without limitation, interest thereupon from the date incurred,
imposed, or asserted until paid at the Default Rate, as defined in the Loan
Agreement.

Except as specifically defined herein, all capitalized terms used herein that
are defined in the Loan Agreement shall have the meanings ascribed to them in
the Loan Agreement.  Unless otherwise defined in this Section 2, terms that are
defined in Chapter 1309 of the Ohio Revised Code, as in effect from time to
time, are used herein as so defined.

     3.   SECURITY INTEREST.  In consideration of and as security for the full
and complete payment of all of the Debt, Pledgor hereby agrees that Agent, for
the benefit of the Banks, shall at all times have, and hereby grants to Agent,
for the benefit of the Banks, a security interest in and an assignment of all of
the Collateral, including (without limitation) all of Pledgor's future
Collateral, irrespective of any lack of knowledge by Agent or the Banks of the
creation or acquisition thereof.

     4.   REPRESENTATIONS AND WARRANTIES.  Pledgor hereby represents and
warrants to Agent and each Bank as follows:

     4.1. Pledgor is a [corporation] [limited liability company] [limited
partnership] duly organized, validly existing and in [good standing] [full force
and effect] under the laws of its state of [incorporation] [formation] and is
duly qualified to do business in each state in which a failure to so qualify
would have a material adverse effect on Pledgor.

     4.2. Pledgor has full power, authority and legal right to pledge the
Collateral, to execute and deliver this Agreement, and to perform and observe
the provisions hereof.  The [officers][members][partners] acting on Pledgor's
behalf have been duly authorized to execute

                                       89
<PAGE>

and deliver this Agreement and to execute and file appropriate financing
statements in respect hereof. This Agreement is valid and binding upon Pledgor
in accordance with the terms hereof.

     4.3. Neither the execution and delivery of this Agreement, nor the
performance and observance of the provisions hereof, by Pledgor will conflict
with, or constitute a violation or default under, any provision of any
applicable law or of any contract (including, without limitation, Pledgor's
certificate (or articles) of [incorporation] [organization] and [regulations (by
laws)] [operating agreement]) or of any other writing binding upon Pledgor in
any manner.

     4.4. Pledgor's principal place of business and the location where Pledgor
keeps records in respect of the Accounts are set forth on Schedule 6.5 to the
                                                          ------------
Loan Agreement and Pledgor has places of business or maintains Collateral at the
locations set forth on Schedule 6.5 to the Loan Agreement.
                       ------------

     4.5. At the execution and delivery hereof, except as permitted pursuant to
the Loan Agreement, (a) there is no financing statement outstanding covering the
Collateral or any part thereof other than a financing statement in favor of
Agent, for the benefit of the Banks; (b) none of the Collateral is subject to
any security interest or lien of any kind other than the security interest
herein granted to Agent, for the benefit of the Banks, or previously granted to
Agent, for the benefit of the Banks; (c) the Internal Revenue Service has not
alleged the nonpayment or underpayment of any tax by Pledgor or threatened to
make any assessment in respect thereof; (d) upon execution of this Agreement and
the filing of the U.C.C. financing statements being executed in connection
herewith, Agent will have, for the benefit of the Banks, a valid and enforceable
security interest in the Collateral; and (e) Pledgor has not entered into any
contract or agreement that would prohibit Agent and the Banks from acquiring a
security interest, mortgage or other lien on, or a collateral assignment of, any
of the property or assets of Pledgor.

     4.6. Pledgor has received consideration that is the reasonable equivalent
value of the obligations and liabilities that Pledgor has incurred to the Banks.
Pledgor is not insolvent, as defined in any applicable state or federal statute,
nor will Pledgor be rendered insolvent by the execution and delivery of this
Agreement to Agent or any other documents executed and delivered to Agent or the
Banks in connection herewith.  Pledgor has not engaged, nor is Pledgor about to
engage, in any business or transaction for which the assets retained by it are
or will be an unreasonably small amount of capital, taking into consideration
the obligations to the Banks incurred hereunder.  Pledgor does not intend to,
nor does it believe that it will, incur debts beyond its ability to pay such
debts as they mature.

     4.7. At the execution and delivery hereof, an Event of Default will not
exist.

     5.   INSURANCE.  Pledgor shall at all times maintain insurance upon its
Inventory, Equipment and other personal and real property in accordance with
Section 5.1 of the Loan Agreement.
-----------

     6.   TAXES AND OTHER PLEDGOR OBLIGATIONS.  Pledgor shall pay in full (a)
all taxes, assessments and governmental charges and levies in accordance with
Section 5.2 of the
-----------
                                       90
<PAGE>

Loan Agreement; (b) all of its wage obligations to its employees in accordance
Section 5.2 of the Loan Agreement; (c) all obligations under the Employees
-----------
Retirement Income Security Act of 1974, as amended from time to time, in
accordance with Section 5.6 of the Loan Agreement; and (d) all of Pledgor's
                -----------
other obligations calling for the payment of money in accordance with Section
                                                                      -------
5.2 of the Loan Agreement.
---

     7.   CORPORATE NAMES AND LOCATION OF COLLATERAL.  Pledgor shall not change
its name, unless, in each case, Pledgor shall provide Agent with at least thirty
(30) days prior written notice thereof.  Pledgor shall not use trade names,
assumed names or fictitious names without giving Agent at least thirty (30) days
prior written notice thereof.  Pledgor shall also provide Agent with at least
thirty (30) days prior written notification of (a) any change in any location
where any of Pledgor's Inventory or Equipment is maintained, and any new
locations where any of Pledgor's Inventory or Equipment is to be maintained; (b)
any change in the location of the office where Pledgor's records pertaining to
its Accounts are kept; (c) the location of any new places of business and the
changing or closing of any of its existing places of business;  and (d) any
change in Pledgor's chief executive office.  In the event of any of the
foregoing, Pledgor shall promptly execute and deliver to Agent (and Pledgor
agrees that Agent may execute and deliver the same as Pledgor's irrevocable
attorney-in-fact) new U.C.C. financing statements describing the Collateral and
otherwise in form and substance sufficient for recordation wherever necessary or
appropriate, as determined in Agent's sole discretion, to perfect or continue
perfected the security interest of Agent, for the benefit of the Banks, in the
Collateral, based upon such new places of business or names, and Pledgor shall
pay all filing and recording fees and taxes in connection with the filing or
recordation of such financing statements and shall immediately reimburse Agent
therefor if Agent pays the same.  Such amounts not so paid or reimbursed shall
be Related Expenses hereunder.

     8.   NOTICE.  Pledgor shall give Agent prompt written notice if any Event
of Default shall occur hereunder or if the Internal Revenue Service shall allege
the nonpayment or underpayment of any tax by Pledgor or threaten to make any
assessment in respect thereof to the extent that such nonpayment, underpayment
or assessment would have a material adverse effect on Pledgor.

     9.   FINANCIAL RECORDS.  Pledgor shall (a) maintain at all times true and
complete financial records and books of accounts in accordance with generally
accepted accounting principles consistently applied and, (b) forward to Agent
upon the reasonable request of Agent or any Bank, whenever made, (i) invoices,
sales journals or other documents satisfactory to Agent or such Bank, as the
case may be, that summarize Pledgor's Accounts certified by an officer of
Pledgor, (ii) within a reasonable time, an aging report of the Accounts then
outstanding setting forth, in such form and detail and with such representations
and warranties as Agent or such Bank may from time to time reasonably require,
the unpaid balances of all invoices billed respectively during that period and
during each of the three (3) next preceding periods, and certified by an officer
of Pledgor, and (iii) with respect to Pledgor's Inventory and any other
Collateral, such reports and other documents that are reasonably satisfactory to
Agent and the Banks.

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<PAGE>

     10.  TRANSFERS, LIENS AND MODIFICATIONS REGARDING COLLATERAL. Except as
specifically permitted pursuant to the Loan Agreement or this Agreement, Pledgor
shall not, without Agent's prior written consent, (a) sell, assign, transfer, or
otherwise dispose of, or grant any option with respect to, or create, incur, or
permit to exist any pledge, lien, mortgage, hypothecation, security interest,
charge, option or any other encumbrance with respect to any of the Collateral,
or any interest therein, or any proceeds thereof, except for the lien and
security interest provided for by this Agreement and any security agreement
securing only Agent, for the benefit of the Banks; (b) grant any security
interest in or incur any lien of any kind on any of the Collateral other than
any security interest granted to Agent, for the benefit of the Banks; or (c)
enter into or assent to any amendment, compromise, extension, release or other
modification of any kind of, or substitution for, any of its Accounts.

     11.  COLLATERAL.  Pledgor shall:

     (a)  at all reasonable times allow Agent by or through any of its officers,
agents, employees, attorneys, or accountants to (i) examine, inspect, and make
extracts from Pledgor's books and other records, including, without limitation,
the tax returns of Pledgor, (ii) after the occurrence of an Event of Default,
arrange for verification of Pledgor's Accounts, under reasonable procedures,
directly with Account Debtors or by other methods, and (iii) examine and inspect
Pledgor's Inventory and Equipment, wherever located;

     (b)  promptly furnish to Agent and the Banks upon reasonable request (i)
additional statements and information with respect to the Collateral, and all
writings and information relating to or evidencing any of Pledgor's Accounts
(including, without limitation, computer printouts or typewritten reports
listing the mailing addresses of all present Account Debtors), and (ii) any
other writings and information as Agent may request;

     (c)  immediately notify Agent and the Banks in writing of any information
that Pledgor has or may receive with respect to the Collateral that might in any
manner materially and adversely affect the value thereof or the rights of Agent
or any Bank with respect thereto;

     (d)  maintain the Equipment in good operating condition and repair,
ordinary wear and tear excepted, making all necessary replacements thereof so
that the value and operating efficiency thereof shall at all times be maintained
and preserved, and promptly inform Agent of any additions to or deletions from
the Equipment; and

     (e)  upon request of Agent, promptly take such action and promptly make,
execute, and deliver all such additional and further items, deeds, assurances,
instruments and any other writings as Agent or the Banks may from time to time
deem necessary or appropriate, including, without limitation, financing
statements and chattel paper, to carry into effect the intention of this
Agreement or so as to completely vest in and ensure to Agent and the Banks their
rights hereunder and in or to the Collateral.

If certificates of title or applications for title are issued or outstanding
with respect to any of Pledgor's Inventory or Equipment, Pledgor shall upon
request of Agent, (i) execute and deliver

                                       92
<PAGE>
to Agent a short form security agreement, in form and substance satisfactory to
Agent, and (ii) deliver such certificate or application to Agent and cause the
interests of Agent and the Banks to be properly noted thereon. Pledgor hereby
authorizes Agent or Agent's designated agent (but without obligation by Agent to
do so) to incur Related Expenses (whether prior to, upon, or subsequent to any
Event of Default hereunder), and Pledgor shall promptly repay, reimburse and
indemnify Agent for any and all Related Expenses. If Pledgor fails to keep and
maintain the Equipment in good operating condition, Agent may (but shall not be
required to) so maintain or repair all or any part of the Equipment and the cost
thereof shall be a Related Expense. All Related Expenses are payable to Agent
upon demand therefor.

     12.  COLLECTIONS AND RECEIPT OF PROCEEDS BY PLEDGOR.  Prior to exercise by
Agent and the Majority Banks of their rights under this Agreement, both (a) the
lawful collection and enforcement of all of Pledgor's Accounts, and (b) the
lawful receipt and retention by Pledgor of all Proceeds of all of Pledgor's
Accounts and Inventory shall be as the agent of Agent and the Banks.  Upon
written notice to Pledgor from Agent after an Event of Default, a Cash
Collateral Account shall be opened by Pledgor at the main office of Agent and
all such lawful collections of Pledgor's Accounts and such Proceeds of Pledgor's
Accounts and Inventory shall be remitted daily by Pledgor to Agent in the form
in which they are received by Pledgor, either by mailing or by delivering such
collections and Proceeds to Agent, appropriately endorsed for deposit in the
Cash Collateral Account.  In the event that such notice is given to Pledgor from
Agent, Pledgor shall not commingle such collections or Proceeds with any of
Pledgor's other funds or property, but shall hold such collections and Proceeds
separate and apart therefrom upon an express trust for Agent.  In such case,
Agent may, in its sole discretion at any time and from time to time, apply all
or any portion of the account balance in the Cash Collateral Account as a credit
against the Debt. If any remittance shall be dishonored, or if, upon final
payment, any claim with respect thereto shall be made against Agent on its
warranties of collection, Agent may charge the amount of such item against the
Cash Collateral Account or any other Deposit Account maintained by Pledgor with
Agent, and, in any event, retain the same and Pledgor's interest therein as
additional security for the Debt.  Agent may, in its sole discretion, at any
time and from time to time, release funds from the Cash Collateral Account to
Pledgor for use in Pledgor's business.  The balance in the Cash Collateral
Account may be withdrawn by Pledgor upon termination of this Agreement and
payment in full of all of the Debt.  At Agent's request after the occurrence of
an Event of Default, Pledgor shall cause all remittances representing
collections and Proceeds of Collateral to be mailed to a lock box in Cleveland,
Ohio, to which Agent shall have access for the processing of such items in
accordance with the provisions, terms, and conditions of Agent's customary lock
box agreement.

     13.  COLLECTIONS AND RECEIPT OF PROCEEDS BY AGENT.  After the occurrence of
an Event of Default, Agent shall, at all times, have the right, but not the
duty, to collect and enforce any or all of the Accounts as Agent may deem
advisable and, if Agent shall at any time or times elect to do so in whole or in
part, Agent shall not be liable to Pledgor except for willful misconduct, if
any.  Pledgor hereby constitutes and appoints Agent, or Agent's designated
agent, as Pledgor's attorney-in-fact to exercise, at any time after the
occurrence of an Event of Default, all or any of the following powers which,
being coupled with an interest, shall be irrevocable until the complete and full
payment of all of the Debt:

                                       93
<PAGE>

     (a)  to receive, retain, acquire, take, endorse, assign, deliver, accept,
and deposit, in Agent's name or Pledgor's name, any and all of Pledgor's cash,
instruments, chattel paper, documents, Proceeds of Accounts, Proceeds of
Inventory, collection of Accounts, and any other writings relating to any of the
Collateral. Pledgor hereby waives presentment, demand, notice of dishonor,
protest, notice of protest, and any and all other similar notices with respect
thereto, regardless of the form of any endorsement thereof.  Neither Agent nor
the Banks shall be bound or obligated to take any action to preserve any rights
therein against prior parties thereto;

     (b)  to transmit to Account Debtors, on any or all of Pledgor's Accounts,
notice of assignment to Agent, for the benefit of the Banks, thereof and the
security interest of Agent, for the benefit of the Banks, and to request from
such Account Debtors at any time, in Agent's name or in Pledgor's name,
information concerning Pledgor's Accounts and the amounts owing thereon;

     (c)  to transmit to purchasers of any or all of Pledgor's Inventory, notice
of the security interest of Agent, for the benefit of the Banks, and to request
from such purchasers at any time, in Agent's name or in Pledgor's name,
information concerning Pledgor's Inventory and the amounts owing thereon by such
purchasers;

     (d)  to notify and require Account Debtors on Pledgor's Accounts and
purchasers of Pledgor's Inventory to make payment of their indebtedness directly
to Agent, for the benefit of the Banks;

     (e)  to enter into or assent to such amendment, compromise, extension,
release or other modification of any kind of, or substitution for, the accounts
or any thereof as Agent in its reasonable discretion may deem to be advisable;

     (f)  to enforce the Accounts or any thereof, or any other Collateral, by
suit or otherwise, to maintain any such suit or other proceeding in Agent's own
name or in Pledgor's name, and to withdraw any such suit or other proceeding.
Pledgor agrees to lend every assistance requested by Agent in respect of the
foregoing, all at no cost or expense to Agent or the Banks and including,
without limitation, the furnishing of such witnesses and of such records and
other writings as Agent may require in connection with making legal proof of any
Account.  Pledgor agrees to reimburse Agent and the Banks in full for all court
costs and reasonable attorneys' fees and every other cost, expense or liability,
if any, incurred or paid by Agent or the Banks in connection with the foregoing,
which obligation of Pledgor shall constitute Debt, shall be secured by the
Collateral and shall bear interest, until paid, at the Default Rate; and

     (g)  to accept all collections in any form relating to the Collateral,
including remittances that may reflect deductions, and to deposit the same, into
Pledgor's Cash Collateral Account or, at the option of Agent, to apply them as a
payment on the Debt.

     14.  USE OF INVENTORY AND EQUIPMENT.  Until an Event of Default shall
occur, Pledgor may (a) retain possession of and use its Inventory and Equipment
in any lawful

                                       94
<PAGE>

manner not inconsistent with this Agreement or with the terms, conditions, or
provisions of any policy of insurance thereon; (b) sell or lease its Inventory
in the ordinary course of business; provided, however, that a sale or lease in
the ordinary course of business does not include a transfer in partial or total
satisfaction of any indebtedness, except for transfers in satisfaction of
partial or total purchase money prepayments by a buyer in the ordinary course of
Pledgor's business; and (c) use and consume raw materials or supplies, the use
and consumption of which are necessary in order to carry on Pledgor's business.

     15.    [INTENTIONALLY OMITTED]

     16.    DEFAULT AND REMEDIES.

     16.1.  Any of the following shall constitute an Event of Default under this
Agreement:  (a) an Event of Default, as defined in the Loan Agreement, shall
occur under the Loan Agreement; (b) any representation, warranty or statement
made by Pledgor in or pursuant to this Agreement or in any other writing
received by Agent or the Banks in connection with the Debt shall be false or
erroneous in any material respect; or (c) Pledgor shall fail or omit to perform
or observe any agreement made by Pledgor in or pursuant to this Agreement or in
any other writing received by Agent or any Bank pursuant hereto.

     16.2.  Upon the occurrence of an Event of Default hereunder, and at all
times thereafter, Agent and the Banks shall have the rights and remedies of a
secured party under the Ohio Revised Code, in addition to the rights and
remedies of a secured party provided elsewhere within this Agreement or in any
other Related Writing executed by Pledgor.  Agent may require Pledgor to
assemble the Collateral, which Pledgor agrees to do, and make it available to
Agent at a reasonably convenient place to be designated by Agent.  Agent may,
with or without notice to or demand upon Pledgor and with or without the aid of
legal process, make use of such force as may be necessary to enter any premises
where the Collateral, or any thereof, may be found and to take possession
thereof (including anything found in or on the Collateral that is not
specifically described in this Agreement, each of which findings shall  be
considered to be an accession to and a part of the Collateral) and for that
purpose may pursue the Collateral wherever the same may be found, without
liability for trespass or damage caused thereby to Pledgor.  After any delivery
or taking of possession of the Collateral, or any thereof, pursuant to this
Agreement, then, with or without resort to Pledgor or any other Person or
property, all of which Pledgor hereby waives, and upon such terms and in such
manner as Agent may deem advisable, Agent, in its discretion, may sell, assign,
transfer and deliver any of the Collateral at any time or, from time to time.
No prior notice need be given to Pledgor or to any other Person in the case of
any sale of Collateral that Agent determines to be perishable or to be declining
speedily in value or that is customarily sold in any recognized market, but in
any other case Agent shall give Pledgor no fewer than ten (10) days prior notice
of either the time and place of any public sale of the Collateral or of the time
after which any private sale or other intended disposition thereof is to be
made.  Pledgor waives advertisement of any such sale and (except to the extent
specifically required by the preceding sentence) waives notice of any kind in
respect of any such sale.  At any such public sale, Agent or any Bank may
purchase the Collateral, or any part thereof, free from any right of redemption,
all of which rights Pledgor hereby waives and releases.  After

                                       95
<PAGE>

deducting all Related Expenses, and after paying all claims, if any, secured by
liens having precedence over this Agreement, Agent may apply the net proceeds of
each such sale to or toward the payment of the Debt, whether or not then due, in
such order and by such division as Agent in its sole discretion may deem
advisable. Any excess, to the extent permitted by law, shall be paid to Pledgor,
and the obligors on the Debt shall remain liable for any deficiency. In
addition, Agent shall at all times have the right to obtain new appraisals of
Pledgor or the Collateral, the cost of which shall be paid by Pledgor.

     17.    MAXIMUM LIABILITY OF PLEDGOR.

     17.1.  Pledgor's Liability Limited in Amount.  Subject to subsection 17.5
            -------------------------------------
hereof, but otherwise notwithstanding anything to the contrary contained in this
Agreement, the maximum amount of the Debt secured by this Agreement shall not
exceed the sum of (a) that portion of the Loan the proceeds of which are used by
Borrower to make Valuable Transfers (as hereinafter defined) to Pledgor, plus
(b) ninety-five percent (95%) of the Adjusted Net Worth (as hereinafter
defined), but only to the extent that the Adjusted Net Worth is a positive
number, of Pledgor at the date of this Agreement.

     17.2.  Definition of Terms Used in Section 17.  For purposes of this
            --------------------------------------
Section 17:

            "Adjusted Net Worth" shall mean, as of any date of determination
thereof, the excess of (a) the amount of the fair saleable value (or fair
valuation, if relevant under applicable law) of the assets of Pledgor as of the
date of such determination, determined in accordance with applicable federal and
state laws governing determinations of insolvency of debtors, over (b) the
amount of all liabilities of Pledgor, contingent or otherwise, as of the date of
such determination, determined in accordance with applicable federal and state
law as referenced in the preceding clause (a), and in all events prior to giving
effect to Valuable Transfers.

            "Incurred Amount" shall mean the maximum amount for which Pledgor
may be liable under this Agreement (after giving effect to the incurring of the
obligations under this Agreement and to any rights to contribution of Pledgor
from other affiliates of Borrower) without rendering the rights to payment
hereunder of Bank void, voidable or avoidable under any applicable fraudulent
transfer law.

            "Valuable Transfer" shall mean (a) all loans, advances or capital
contributions made to Pledgor with proceeds of the Loan; (b) the fair market
value of all property acquired with proceeds of the Loan and transferred to
Pledgor; (c) the interest on and the fees in respect of the Loan, the proceeds
of which are used to make such a Valuable Transfer; and (d) the value of any
quantifiable economic benefits not included in clauses (a) through (c) above,
but includable in accordance with applicable federal and state laws governing
determinations of the insolvency of debtors, accruing to Pledgor as a result of
the Loan.

     17.3.  Debt May Exceed Pledgor's Maximum Liability.  Pledgor agrees that
            -------------------------------------------
the Debt may at any time and from time to time exceed the maximum amount of the
Debt secured by this

                                       96
<PAGE>

Agreement without impairing this Agreement or affecting the rights and remedies
of Agent or the Banks hereunder.

     17.4.  Pledgor's Liability Not Reduced by Payments by Others.  No payment
            -----------------------------------------------------
or payments made by Borrower, Pledgor or any other Person or received or
collected by Agent or the Banks from Borrower, Pledgor or any other Person by
virtue of any action or proceeding or any set-off or appropriation or
application at any time or from time to time in reduction of or in payment of
the Debt shall be deemed to modify, reduce, release or otherwise affect the
amount of the Debt secured by this Agreement and this Agreement shall,
notwithstanding any such payment or payments (other than payments made to Agent
or the Banks by Pledgor or payments received or collected by Agent or the Banks
from Pledgor), secure the Debt up to the maximum amount of the Debt secured by
this Agreement as set forth above until the Debt is indefeasibly paid in full in
cash.

     17.5.  Adjustments to Maximum Liability.  Anything in this Section 17 to
            --------------------------------
the contrary notwithstanding, in no event shall the amount of the Debt secured
by this Agreement as set forth in subsections 17.1 through 17.4 hereof exceed
the Incurred Amount; and further provided that, if a greater amount of the Debt
than the maximum liability set forth in this Section 17, (a) could be secured by
Pledgor as a result of an increase in Pledgor's Adjusted Net Worth subsequent to
the date of this Agreement, and (b) is equal to or less than the Incurred
Amount, then the amount of Pledgor's maximum liability calculated in subsection
17.1 hereof shall be calculated based upon Pledgor's Adjusted Net Worth on such
later date, rather than the date of execution of this Agreement.

     18.    INTERPRETATION.  Each right, power or privilege specified or
referred to in this Agreement is cumulative and in addition to and not in
limitation of any other rights, powers and privileges that Agent or the Banks
may otherwise have or acquire by operation of law, by contract or otherwise. No
course of dealing by Agent or the Banks in respect of, nor any omission or delay
by Agent or the Banks in the exercise of, any right, power or privilege shall
operate as a waiver thereof, nor shall any single or partial exercise of any
such right, power or privilege preclude any other or further exercise thereof or
of any other right, power or privilege, as Agent or the Banks may exercise each
such right, power or privilege either independently or concurrently with others
and as often and in such order as Agent and the Banks may deem expedient. No
waiver, consent or other agreement shall be deemed to have been made by Agent or
the Banks or be binding upon Agent or the Banks in any case unless specifically
granted by Agent in writing, and each such writing shall be strictly construed.
If, at any time, one or more provisions of this Agreement is or becomes invalid,
illegal or unenforceable in whole or in part, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby. Pledgor hereby authorizes Agent to file financing statements
with respect to the Collateral. A carbon, photographic, or other reproduction of
this Agreement may be used as a financing statement. The captions to sections
herein are inserted for convenience only and shall be ignored in interpreting
the provisions of this Agreement.

     19.    NOTICE.  All notices, requests, demands and other communications
provided for hereunder shall be in writing and, if to Pledgor, mailed or
delivered to it, addressed to it at the

                                       97
<PAGE>

address specified on the signature page of this Agreement, if to a Bank, mailed
or delivered to it, addressed to the address of such Bank specified on the
signature pages of the Loan Agreement. All notices, statements, requests,
demands and other communications provided for hereunder shall be given by
overnight delivery or first class mail with postage prepaid by registered or
certified mail, addressed as aforesaid, or sent by facsimile with telephonic
confirmation of receipt, except that all notices hereunder shall not be
effective until received.

     20.  GOVERNING LAW; SUBMISSION TO JURISDICTION.  The provisions of this
Agreement and the respective rights and duties of Pledgor, Agent and the Banks
hereunder shall be governed by and construed in accordance with Ohio law,
without regard to principles of conflict of laws. Pledgor hereby irrevocably
submits to the non-exclusive jurisdiction of any Ohio state or federal court
sitting in Cleveland, Ohio, over any action or proceeding arising out of or
relating to this Agreement, any Loan Document or any Related Writing, and
Pledgor hereby irrevocably agrees that all claims in respect of such action or
proceeding may be heard and determined in such Ohio state or federal court.
Pledgor hereby irrevocably waives, to the fullest extent permitted by law, any
objection it may now or hereafter have to the laying of venue in any action or
proceeding in any such court as well as any right it may now or hereafter have
to remove such action or proceeding, once commenced, to another court on the
grounds of FORUM NON CONVENIENS or otherwise.  Pledgor agrees that a final,
nonappealable judgment in any such action or proceeding shall be conclusive and
may be enforced in other jurisdictions by suit on the judgment or in any other
manner provided by law.

     21.  SUCCESSORS AND ASSIGNS.  This Agreement shall be binding upon Pledgor
and Pledgor's successors and assigns and shall inure to the benefit of, be
enforceable and exercisable by and be binding upon Agent on behalf of and for
the benefit of the Banks and their respective successors and assigns.

     22.  TERMINATION.  At such time as the Debt has been irrevocably paid in
full, the Commitment, as defined in the Loan Agreement, terminated, and the Loan
Agreement terminated and not replaced by any other credit facility with Agent
and the Banks, this Agreement shall terminate and, upon written request of
Pledgor, Agent shall promptly execute and deliver to Pledgor appropriate
termination statements.

     23.  ENTIRE AGREEMENT.  This Agreement integrates all of the terms and
conditions as to the Collateral and supersedes all oral representations and
negotiations and prior writings with respect to the subject matter hereof.

     24.  DESIGNATED SENIOR INDEBTEDNESS.  THE INDEBTEDNESS EVIDENCED BY THIS
AGREEMENT, THE LOAN AGREEMENT, EACH OF THE NOTES, AND EACH OTHER LOAN DOCUMENT
IS AND SHALL AT ALL TIMES CONSTITUTE "DESIGNATED SENIOR INDEBTEDNESS" UNDER THE
PROVISIONS OF THAT CERTAIN INDENTURE, DATED AS OF FEBRUARY 1, 1999, AS AMENDED,
AMONG OGLEBAY NORTON COMPANY, THE GUARANTORS NAMED THEREIN AND NORWEST BANK
MINNESOTA, NATIONAL ASSOCIATION, AS TRUSTEE.

                                       98
<PAGE>

     25.  JURY TRIAL WAIVER.  PLEDGOR, AGENT AND THE BANKS WAIVE ANY RIGHT TO
HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT,
TORT, OR OTHERWISE, AMONG PLEDGOR, BORROWER, AGENT AND THE BANKS, OR ANY
THEREOF, ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE
RELATIONSHIP ESTABLISHED AMONG THEM IN CONNECTION WITH THIS AGREEMENT OR ANY
NOTE OR OTHER INSTRUMENT, DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN
CONNECTION HEREWITH OR THE TRANSACTIONS RELATED THERETO.

     Executed as of the 3rd day of April, 2000, at Cleveland, Ohio.

Address:  1100 Superior Avenue
          Cleveland, Ohio 44114


                                       99
<PAGE>

                                   EXHIBIT H

                                    FORM OF

                 COLLATERAL ASSIGNMENT AND SECURITY AGREEMENT

     1.   RECITALS.

     OGLEBAY NORTON COMPANY, a Delaware corporation (together with its
successors and assigns, "Borrower"), is entering into the Loan Agreement, as
hereinafter defined, with the financial institutions listed on Schedule 1 to the
Loan Agreement (collectively, together with their respective successors and
assigns, "Banks" and individually, "Bank") and KEYBANK NATIONAL ASSOCIATION, as
agent for the Banks ("Agent"). [__________________________], a [___________]
[corporation] [limited liability company] [limited partnership] ("Pledgor"),
desires that the Banks grant the financial accommodations to Borrower as
described in the Loan Agreement.

     Pledgor, a subsidiary of Borrower whose financing is provided by the
financial accommodations extended to Borrower through the Loan Agreement and the
other facilities extended to Borrower by Agent and the Banks, deems it to be in
the direct pecuniary and business interests of Pledgor that Borrower obtain from
the Banks the Loan, as hereinafter defined, and other financial accommodations
provided for in the Loan Agreement.

     Pledgor understands that the Banks are willing to grant such financial
accommodations to Borrower only upon certain terms and conditions, one of which
is that Pledgor grant to Agent, for the benefit of the Banks, a security
interest in and an assignment of the Collateral, as hereinafter defined, and
this Collateral Assignment and Security Agreement (as the same may from time to
time be amended, restated or otherwise modified, this "Agreement") is being
executed and delivered in consideration of each financial accommodation granted
to Borrower by the Banks and for other valuable considerations.

     2.   DEFINITIONS.  As used herein, the following terms shall have the
following meanings:

     2.1. "Collateral" shall mean, collectively, all of Pledgor's existing and
future (a) patents, patent registrations, patent applications, trademarks,
trademark registrations, trademark applications and copyright registrations,
whether federal or state, including, but not limited to, those listed on

Schedule A hereto (as such Schedule A may from time to time be amended,
----------                 ----------
supplemented or otherwise modified); (b) common law trademark rights,
copyrights, improvements and inventions; (c) renewals, proceeds on infringement
suits, and rights to sue for past, present and future infringements relating to
any of the foregoing; (d) goodwill associated with any of the foregoing; and (e)
proceeds of any of the foregoing.

     2.2. "Debt" shall mean, collectively, (a) the Loan; (b) all other
indebtedness now owing or hereafter incurred by Borrower to Agent or any Bank
pursuant to the Loan Agreement

                                      100
<PAGE>

and any Note executed in connection therewith; (c) each renewal, extension,
consolidation or refinancing of any of the foregoing, in whole or in part; (d)
all interest from time to time accruing on any of the foregoing, and all fees
and other amounts payable by Borrower to Agent or any Bank pursuant to the Loan
Agreement; (e) all obligations and liabilities of Borrower now existing or
hereafter incurred to Agent or any Bank under, arising out of, or in connection
with any Hedge Agreement; (f) all amounts payable by Borrower to Agent or any
Bank pursuant to the Loan Agreement or any Related Writing; and (g) all Related
Expenses.

     2.3. "Hedge Agreement" shall mean any currency swap or hedge agreement,
interest rate swap, cap, collar or floor agreement, or other interest rate
management device entered into by Borrower or Original Borrower with Agent or
any of the Banks, or any of their respective affiliates in connection with the
Debt.

     2.4. "Loan" shall mean the Term Loan, as defined in the Loan Agreement, and
any other loan, granted pursuant to the Loan Agreement.

     2.5. "Loan Agreement" shall mean the Loan Agreement executed by and among
Borrower, Agent and the Banks and dated as of April 3, 2000, as the same may
from time to time be amended, restated or otherwise modified.

     2.6. "Person" shall mean any individual, sole proprietorship, partnership,
joint venture, unincorporated organization, corporation, limited liability
company, institution, trust, estate, government or other agency or political
subdivision thereof or any other entity.

     2.7. "Related Expenses" shall mean any and all reasonable costs,
liabilities, and expenses (including, without limitation, losses, damages,
penalties, claims, actions, reasonable attorneys' fees, legal expenses,
judgments, suits, and disbursements) (a) incurred by, imposed upon, or asserted
against, Agent or any Bank in any attempt by Agent or any Bank to (i) obtain,
preserve, perfect, or enforce any security interest evidenced by this Agreement,
the Loan Agreement or any Related Writing, as defined in the Loan Agreement;
(ii) obtain payment, performance, and observance of any and all of the Debt; or
(iii) maintain, insure, audit, collect, preserve, repossess, and dispose of any
of the Collateral or any other collateral securing the Debt, including, without
limitation, costs and expenses for appraisals, assessments, and audits of
Pledgor or any such collateral; or (b) incidental or related to (a) above,
including, without limitation, interest thereupon from the date incurred,
imposed, or asserted until paid at the Default Rate, as defined in the Loan
Agreement.

Except as specifically defined herein, all capitalized terms used herein that
are defined in the Loan Agreement shall have the meanings ascribed to them in
the Loan Agreement.  Unless otherwise defined in this Section 2, terms that are
defined in Chapter 1309 of the Ohio Revised Code, as in effect from time to
time, are used herein as so defined.

     3.   GRANT OF ASSIGNMENT AND SECURITY INTEREST.  In consideration of and as
security for the full and complete payment of all of the Debt, Pledgor hereby
agrees that Agent, for the benefit of the Banks, shall at all times have, and
hereby grants to Agent, for the

                                      101
<PAGE>

benefit of the Banks, a security interest in and assignment of all of the
Collateral, including (without limitation) all of Pledgor's future Collateral,
irrespective of any lack of knowledge by Agent or the Banks of the creation or
acquisition thereof.

     4.   WARRANTIES AND REPRESENTATIONS.  Pledgor represents and warrants to
Agent and the Banks that each of the following statements is true and complete:

     (a)  Pledgor owns the Collateral and, whether the same are registered or
unregistered, no such Collateral has been adjudged invalid or unenforceable.

     (b)  The Collateral is valid and enforceable.

     (c)  Pledgor has no knowledge of any claim that the use of any of the
Collateral does or may violate the rights of any third person.

     (d)  Except for the liens granted in this Agreement or permitted by the
Loan Agreement, Pledgor is the sole and exclusive owner of the entire and
unencumbered right, title and interest in and to the Collateral, free and clear
of any liens, charges and encumbrances, including, without limitation, pledges,
assignments, licenses, registered user agreements and covenants by Pledgor not
to sue third persons.

     (e)  Pledgor has full power, authority and legal right to pledge the
Collateral and enter into this Agreement and perform its terms.

     (f)  Pledgor has used, and will continue to use, for the duration of this
Agreement, proper statutory notice in connection with its use of the Collateral,
except where the failure to do so will not have a material adverse effect.

     5.   RIGHT TO USE.  Unless and until there shall have occurred an Event of
Default (as that term is defined in Section 8 of this Agreement), Agent and the
Banks, to the extent permitted by law, hereby grants to Pledgor the exclusive,
royalty-free, world-wide, nontransferable right and license to use the
Collateral on and in connection with products manufactured, distributed, or both
by or in connection with products sold by Pledgor, for Pledgor's sole benefit
and account and for none other.  Pledgor shall not enter into any agreement
which is inconsistent with Pledgor's obligations under this Agreement and shall
not otherwise sell or assign its interest in, or grant any sublicense under, the
license granted to Pledgor hereunder, without Agent's prior written consent.
Absent such prior written consent, any attempted sale or license is null and
void.

     6.   RIGHT TO INSPECT.  Pledgor hereby grants to Agent and its employees
and agents the right, during regular business hours, to visit Pledgor's plants
and facilities or the plants and facilities of any subcontractors which
manufacture, inspect, sell or store products sold under any of the Collateral,
and to inspect the products and quality control records relating thereto at
reasonable times during regular business hours, at Pledgor's expense.

                                      102
<PAGE>

     7.   STANDARD PATENT AND TRADEMARK USE.

     Pledgor shall not use the Collateral in any manner that would jeopardize
the validity or legal status thereof.  Pledgor shall comply with all patent
marking requirements as specified in 35 U.S.C. (S)287.  Pledgor shall further
conform its usage of any trademarks to standard trademark usage, including, but
not limited to, using the trademark symbols (R), (TM), and SM where appropriate.

     8.   EVENT OF DEFAULT.

     (a)  The occurrence of any of the following shall constitute an "Event of
Default" under this Agreement:

          (i)  If an Event of Default, as defined in the Loan Agreement, shall
     occur under the Loan Agreement; or

          (ii) If Pledgor shall fail to perform any obligation of Pledgor to be
     performed under this Agreement and the same shall not have been fully
     corrected within thirty (30) days after the giving of written notice
     thereof to Pledgor by Agent.

     (b)  If any Event of Default shall have occurred, Pledgor irrevocably
authorizes and empowers Agent, on behalf of the Banks, to terminate Pledgor's
use of the Collateral and to exercise such rights and remedies as allowed by
law.  Without limiting the generality of the foregoing, Agent may immediately
sell at public or private sale, in a commercially reasonable manner, or
otherwise realize upon all or, from time to time, any of the Collateral together
with the associated goodwill, or any interest which Pledgor may have therein,
and, after deducting from the proceeds of sale or other disposition of the
Collateral all expenses (including all reasonable expenses for attorneys' and
brokers' fees and other legal services), Agent shall apply the residue of such
proceeds against payment of the Debt for the benefit of the Banks.  Any
remainder of the proceeds, after payment in full of the Debt, shall be
distributed in accordance with the Chapter 1309 of the Ohio Revised Code.
Notice of any sale or other disposition of the Collateral shall be given to
Pledgor at least five (5) business days before the time of any intended public
or private sale or other disposition of the Collateral is to be made, which
Pledgor hereby agrees shall be reasonable notice of such sale or other
disposition.  At any such sale or other disposition, Agent or any Bank may, to
the extent permissible under applicable law, purchase the whole or any part of
the Collateral sold, free from any right of redemption on the part of Pledgor,
which right is hereby waived and released.

     9.   TERMINATION.  At such time as the Debt has been irrevocably paid in
full, the Commitment, as defined in the Loan Agreement, terminated, and the Loan
Agreement terminated and not replaced by any other credit facility with Agent
and the Banks, this Agreement shall terminate and Agent shall execute and
deliver to Pledgor all deeds, assignments, and other instruments as may be
necessary or proper to release Agent's security interest in and assignment of
the Collateral and to re-vest in Pledgor full title to the Collateral, subject
to any disposition thereof which may have been made by Agent pursuant hereto.

                                      103
<PAGE>

     10.  MAINTAINING COLLATERAL, ATTORNEYS' FEES, COSTS AND EXPENSES.  Pledgor
shall have the obligation and duty to perform all acts necessary to maintain or
preserve the Collateral, provided that Pledgor shall not be obligated to
maintain any Collateral in the event Pledgor determines, in the reasonable
business judgment of Pledgor, that the maintenance of such Collateral is no
longer necessary in Pledgor's business.  Any and all reasonable fees, costs and
expenses, of whatever kind or nature, including, without limitation, the
attorneys' fees and legal expenses incurred by Agent and the Banks in connection
with the amendment and enforcement of this Agreement, all renewals, required
affidavits and all other documents relating hereto and the consummation of this
transaction, the filing or recording of any documents (including all taxes in
connection therewith) in public offices, the payment or discharge of any taxes,
counsel fees, maintenance fees, encumbrances or otherwise protecting,
maintaining or preserving the Collateral, or in defending or prosecuting any
actions or proceedings arising out of or related to the Collateral, shall be
borne and paid by Pledgor, upon demand by Agent, and, until so paid, shall be
added to the principal amount of the Debt.

     11.  PLEDGOR'S OBLIGATIONS TO PROSECUTE.  Except as otherwise agreed to by
Agent in writing, Pledgor shall have the duty to prosecute diligently any patent
application or trademark application pending as of the date of this Agreement or
thereafter until the Debt shall have been paid in full, to file and prosecute
opposition and cancellation proceedings and to do any and all acts which are
necessary or desirable to preserve and maintain all rights in the Collateral,
including, but not limited to, payment of any maintenance fees.  Any expenses
incurred in connection with the Collateral shall be borne by Pledgor.  Pledgor
shall not abandon any Collateral without the prior written consent of Agent,
unless such abandonment will not have a material adverse effect on Pledgor or
such abandonment is in connection with the abandonment of a product or product
line.

     12.  AGENT'S RIGHTS TO ENFORCE.  Pledgor shall have the right to bring any
opposition proceedings, cancellation proceedings or lawsuit in its own name to
enforce or protect the Collateral.  Agent and the Banks shall have the right,
but shall have no obligation, to join in any such action.  Pledgor shall
promptly, upon demand, reimburse and indemnify Agent and the Banks for all
damages, costs and expenses, including attorneys' fees incurred by Agent in
connection with the provisions of this Section 12, in the event Agent and the
Banks elect to join in any such action commenced by Pledgor.

     13.  POWER OF ATTORNEY.  Pledgor hereby authorizes and empowers Agent, on
behalf of the Banks, to make, constitute and appoint any officer or agent of
Agent as Agent may select, in its exclusive discretion, as Pledgor's true and
lawful attorney-in-fact, with the power to endorse, after the occurrence of an
Event of Default, Pledgor's name on all applications, documents, papers and
instruments necessary for Agent to use the Collateral, or to grant or issue any
exclusive or nonexclusive license under the Collateral to any third party, or
necessary for Agent to assign, pledge, convey or otherwise transfer title in or
dispose of the Collateral, together with associated goodwill to a third party or
parties.  Pledgor hereby ratifies all that such attorney shall lawfully do or
cause to be done by virtue hereof.  This power of attorney shall be irrevocable
for the life of this Agreement.

                                      104
<PAGE>

     14.    AGENT'S RIGHT TO PERFORM OBLIGATIONS.  If Pledgor fails to comply
with any of its obligations under this Agreement, Agent, on behalf of the Banks,
may, but is not obligated to, do so in Pledgor's name or in Agent's name, but at
Pledgor's expense, and Pledgor hereby agrees to reimburse Agent on demand in
full for all expenses, including reasonable attorneys' fees, incurred by Agent
in protecting, defending and maintaining the Collateral.

     15.    ADDITIONAL DOCUMENTS.  Pledgor shall, upon written request of Agent,
enter into such additional documents or instruments as may be required by Agent
in order to effectuate, evidence or perfect Agent's interests in the Collateral
as evidenced by this Agreement.

     16.    NEW COLLATERAL.  If, before the Debt shall have been satisfied in
full, Pledgor shall obtain rights to any new Collateral, the provisions of
Section 1 shall automatically apply thereto as if the same were identified on
Schedule A as of the date hereof and Pledgor shall give Agent prompt written
----------
notice thereof.

     17.    MODIFICATION FOR NEW COLLATERAL.  Pledgor hereby authorizes Agent to
modify this Agreement by amending Schedule A to include any future Collateral as
                                  ----------
contemplated by Sections 1 and 16 hereof and, at Agent's request, Pledgor shall
execute any documents or instruments required by Agent in order to modify this
Agreement as provided in this Section 17, provided that any such modification to
Schedule A shall be effective without the signature of Pledgor.
----------

     18.    NO WAIVER.  No course of dealing between Pledgor and Agent and the
Banks, nor any failure to exercise, nor any delay in exercising, on the part of
Agent or the Banks, any right, power or privilege hereunder, under any of the
Loan Documents, or any other document executed in connection with any of the
foregoing shall operate as a waiver thereof; nor shall any single or partial
exercise of any right, power or privilege hereunder or thereunder preclude any
other or further exercise thereof or the exercise of any other right, power or
privilege.

     19.    MAXIMUM LIABILITY OF PLEDGOR.

     19.1.  Pledgor's Liability Limited in Amount.  Subject to subsection 19.5
            -------------------------------------
hereof, but otherwise notwithstanding anything to the contrary contained in this
Agreement, the maximum amount of the Debt secured by this Agreement shall not
exceed the sum of (a) that portion of the Loan the proceeds of which are used by
Borrower to make Valuable Transfers (as hereinafter defined) to Pledgor, plus
(b) ninety-five percent (95%) of the Adjusted Net Worth (as hereinafter
defined), but only to the extent that the Adjusted Net Worth is a positive
number, of Pledgor at the date of this Agreement.

     19.2.  Definition of Terms Used in Section 19.  For purposes of this
            --------------------------------------
Section 19:

            "Adjusted Net Worth" shall mean, as of any date of determination
thereof, the excess of (a) the amount of the fair saleable value (or fair
valuation, if relevant under applicable

                                      105
<PAGE>

law) of the assets of Pledgor as of the date of such determination, determined
in accordance with applicable federal and state laws governing determinations of
insolvency of debtors, over (b) the amount of all liabilities of Pledgor,
contingent or otherwise, as of the date of such determination, determined in
accordance with applicable federal and state law as referenced in the preceding
clause (a), and in all events prior to giving effect to Valuable Transfers.

            "Incurred Amount" shall mean the maximum amount for which Pledgor
may be liable under this Agreement (after giving effect to the incurring of the
obligations under this Agreement and to any rights to contribution of Pledgor
from other affiliates of Borrower) without rendering the rights to payment
hereunder of Bank void, voidable or avoidable under any applicable fraudulent
transfer law.

            "Valuable Transfer" shall mean (a) all loans, advances or capital
contributions made to Pledgor with proceeds of the Loan; (b) the fair market
value of all property acquired with proceeds of the Loan and transferred to
Pledgor; (c) the interest on and the fees in respect of the Loan, the proceeds
of which are used to make such a Valuable Transfer; and (d) the value of any
quantifiable economic benefits not included in clauses (a) through (c) above,
but includable in accordance with applicable federal and state laws governing
determinations of the insolvency of debtors, accruing to Pledgor as a result of
the Loan.

     19.3.  Debt May Exceed Pledgor's Maximum Liability.  Pledgor agrees that
            -------------------------------------------
the Debt may at any time and from time to time exceed the maximum amount of the
Debt secured by this Agreement without impairing this Agreement or affecting the
rights and remedies of Agent or the Banks hereunder.

     19.4.  Pledgor's Liability Not Reduced by Payments by Others.  No payment
            -----------------------------------------------------
or payments made by Borrower, Pledgor or any other Person or received or
collected by Agent or the Banks from Borrower, Pledgor or any other Person by
virtue of any action or proceeding or any set-off or appropriation or
application at any time or from time to time in reduction of or in payment of
the Debt shall be deemed to modify, reduce, release or otherwise affect the
amount of the Debt secured by this Agreement and this Agreement shall,
notwithstanding any such payment or payments (other than payments made to Agent
or the Banks by Pledgor or payments received or collected by Agent or the Banks
from Pledgor), secure the Debt up to the maximum amount of the Debt secured by
this Agreement as set forth above until the Debt is indefeasibly paid in full in
cash.

     19.5.  Adjustments to Maximum Liability.  Anything in this Section 19 to
            --------------------------------
the contrary notwithstanding, in no event shall the amount of the Debt secured
by this Agreement as set forth in subsections 19.1 through 19.4 hereof exceed
the Incurred Amount; and further provided that, if a greater amount of the Debt
than the maximum liability set forth in this Section 19, (a) could be secured by
Pledgor as a result of an increase in Pledgor's Adjusted Net Worth subsequent to
the date of this Agreement, and (b) is equal to or less than the Incurred
Amount, then the amount of Pledgor's maximum liability calculated in subsection
19.1 hereof shall be calculated based upon Pledgor's Adjusted Net Worth on such
later date, rather than the date of execution of this Agreement.

                                      106
<PAGE>

     20.  REMEDIES CUMULATIVE.  All of the rights and remedies of Agent and the
Banks with respect to the Collateral, whether established hereby or by any other
Loan Document, or by any other agreements or by law shall be cumulative and may
be executed singularly or concurrently.

     21.  SEVERABILITY.  The provisions of this Agreement are severable, and, if
any clause or provision shall be held invalid and unenforceable in whole or in
part in any jurisdiction, then such invalidity or unenforceability shall affect
only such clause or provision, or part thereof, in such jurisdiction, and shall
not in any manner affect such clause or provision in any other jurisdiction, or
any other clause or provision of this Agreement in any jurisdiction.

     22.  MODIFICATIONS.  This Agreement may be amended or modified only by a
writing signed by the parties hereto, except as provided in Section 17 above.
In the event that any provision herein is deemed to be inconsistent with any
provision of any other Loan Documents (except the Loan Agreement) relating to
the Collateral, the provisions of this Agreement shall control.

     23.  SUCCESSORS AND ASSIGNS.  This Agreement shall inure to the benefit of
and be binding upon the respective successors and permitted assigns of the
parties, except that Pledgor may not assign any of its rights or duties
hereunder without the prior written consent of Agent.  Any attempted assignment
or transfer without the prior written consent of Agent shall be null and void.

     24.  NOTICE.  All notices, requests, demands and other communications
provided for hereunder shall be in writing and, if to Pledgor, mailed or
delivered to it, addressed to it at the address specified on the signature page
to this Agreement, if to Agent or a Bank, mailed or delivered to it, addressed
to the address of Agent or such Bank specified on the signature pages of the
Loan Agreement. All notices, statements, requests, demands and other
communications provided for hereunder shall be given by overnight delivery or
first class mail with postage prepaid by registered or certified mail, addressed
as aforesaid, or sent by facsimile with telephonic confirmation of receipt,
except that notices pursuant to any of the provisions hereof shall not be
effective until received.

     25.  GOVERNING LAW/JURISDICTION.  This Agreement shall be construed and
enforced in accordance with, and the rights of the parties shall be governed by,
the laws of the State of Ohio, without regard to principles of conflicts of law.
Pledgor hereby consents to the personal jurisdiction of the state and federal
courts of the State of Ohio in connection with any controversy related to this
Agreement, waives any argument that venue in such forums is not convenient and
agrees that any litigation initiated by Pledgor against Agent or any Bank shall
be venued in the State or Federal District Courts of Ohio.

     26.  DESIGNATED SENIOR INDEBTEDNESS.  THE INDEBTEDNESS EVIDENCED BY THIS
AGREEMENT, THE LOAN AGREEMENT, EACH OF THE NOTES, AND EACH OTHER LOAN DOCUMENT
IS AND SHALL AT ALL TIMES CONSTITUTE

                                      107
<PAGE>

"DESIGNATED SENIOR INDEBTEDNESS" UNDER THE PROVISIONS OF THAT CERTAIN INDENTURE,
DATED AS OF FEBRUARY 1, 1999, AS AMENDED, AMONG OGLEBAY NORTON COMPANY, THE
GUARANTORS NAMED THEREIN AND NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, AS
TRUSTEE.

     27.  JURY TRIAL WAIVER.   PLEDGOR, AGENT AND THE BANKS, TO THE EXTENT
PERMITTED BY LAW, EACH WAIVE ANY RIGHT TO HAVE A JURY PARTICIPATE IN RESOLVING
ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT, OR OTHERWISE, AMONG AGENT, THE
BANKS AND PLEDGOR, OR ANY OF THEM, ARISING OUT OF, IN CONNECTION WITH, RELATED
TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THEM  IN CONNECTION
WITH THIS AGREEMENT OR ANY NOTE OR OTHER AGREEMENT, INSTRUMENT OR DOCUMENT
EXECUTED OR DELIVERED IN CONNECTION THEREWITH OR THE TRANSACTIONS RELATED
THERETO.

     IN WITNESS WHEREOF, the undersigned has executed this Agreement as of the
3rd day of April, 2000.


Address:      1100 Superior Avenue
      [___________________________________]
              Cleveland, Ohio 44114
              Attention: Treasurer

      Title:_______________________________


Acknowledged and consented to by:

KEYBANK NATIONAL ASSOCIATION,
as Agent


By:__________________________________________________________________
Title:_______________________________________________________________

                                      108
<PAGE>

                                ACKNOWLEDGMENTS


THE STATE OF _________   )
                         ) SS:
COUNTY OF _____________  )

     BEFORE ME, the undersigned authority, on this day personally appeared
_________________, known to me to be the person and officer whose name is
subscribed to the foregoing instrument and acknowledged to me that the same was
the act of the said OGLEBAY NORTON COMPANY, a Delaware corporation, and that he
executed the same as the act of such corporation for the purposes and
consideration therein expressed, and in the capacity therein stated.

     GIVEN UNDER MY HAND AND SEAL OF OFFICE this _____ day of ________, 2000.



                                             NOTARY PUBLIC



THE STATE OF _________   )
                         ) SS:
COUNTY OF ___________    )

     BEFORE ME, the undersigned authority, on this day personally appeared
____________ known to me to be the person and officer whose name is subscribed
to the foregoing instrument and acknowledged to me that the same was the act of
the said KEYBANK NATIONAL ASSOCIATION, a national banking association, and that
he executed the same as the act of such national banking association for the
purposes and consideration therein expressed, and in the capacity therein
stated.

     GIVEN UNDER MY HAND AND SEAL OF OFFICE this _____ day of _________, 2000.



                                             NOTARY PUBLIC

                                      109
<PAGE>

                                   SCHEDULE A

                                      110
<PAGE>

                                   EXHIBIT I

                                    FORM OF

                               PLEDGE AGREEMENT

                                   RECITALS:
                                   --------

     OGLEBAY NORTON COMPANY, a Delaware corporation (together with its
successors and assigns, "Borrower"), is entering into the Loan Agreement, as
hereinafter defined, with the financial institutions listed on Schedule 1 to the
Loan Agreement (collectively, together with their respective successors and
assigns, "Banks" and individually, "Bank") and KEYBANK NATIONAL ASSOCIATION, as
agent for the Banks ("Agent").  [_______________________], a [__________]
[corporation] [limited liability company] [limited partnership] ("Pledgor"),
desires that the Banks grant the financial accommodations to Borrower as
described in the Loan Agreement.

     Pledgor, a subsidiary of Borrower whose financing is provided by the
financial accommodations extended to Borrower through the Loan Agreement and the
other facilities extended to Borrower by Agent and the Banks, deems it to be in
the direct pecuniary and business interests of Pledgor that Borrower obtain from
the Banks the Loan, as hereinafter defined, and other financial accommodations
provided for in the Loan Agreement.

     Pledgor understands that the Banks are willing to grant such financial
accommodations to Borrower only upon certain terms and conditions, one of which
is that Pledgor grant to Agent, for the benefit of the Banks, a security
interest in and an assignment of the Collateral, as hereinafter defined, and
this Pledge Agreement (as the same may from time to time be amended, restated or
otherwise modified, this "Agreement") is being executed and delivered in
consideration of each financial accommodation granted to Borrower by the Banks
and for other valuable considerations.

     NOW, THEREFORE, in consideration of the foregoing premises and other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, Pledgor hereby agrees as follows:

     1.   Definitions.  As used herein, the following terms shall have the
          -----------
following meanings:

     "Collateral" shall mean, collectively, the Pledged Securities and each
addition, if any, thereto and each substitution, if any, therefor, in whole or
in part, the certificates representing the Pledged Securities, and the
dividends, cash, instruments and other property distributed in respect of and
other proceeds of any of the foregoing.

                                      111
<PAGE>

     "Debt" shall mean, collectively, (a) the Loan; (b) all other indebtedness
now owing or hereafter incurred by Borrower to Agent or any Bank pursuant to the
Loan Agreement and any Note executed in connection therewith; (c) each renewal,
extension, consolidation or refinancing of any of the foregoing, in whole or in
part; (d) all interest from time to time accruing on any of the foregoing, and
all fees and other amounts payable by Borrower to Agent or any Bank pursuant to
the Loan Agreement; (e) all obligations and liabilities of Borrower now existing
or hereafter incurred to Agent or any Bank under, arising out of, or in
connection with any Hedge Agreement; (f) all amounts payable by Borrower to
Agent or any Bank pursuant to the Loan Agreement or any Related Writing; and (g)
all Related Expenses.

     "Event of Default" shall mean an event or condition that constitutes an
event of default pursuant to Section 7 hereof.

     "Loan" shall mean the Term Loan, as defined in the Loan Agreement, and any
other loan, granted pursuant to the Loan Agreement.

     "Loan Agreement" shall mean the Loan Agreement executed by and among
Borrower, Agent and the Banks and dated as of April 3, 2000, as the same may
from time to time be amended, restated or otherwise modified.

     "Person" shall mean any individual, sole proprietorship, partnership, joint
venture, unincorporated organization, corporation, limited liability company,
institution, trust, estate, government or other agency or political subdivision
thereof or any other entity.

     "Pledged Securities" shall mean all of the shares of stock of each
Subsidiary of Pledgor owned by Pledgor, listed, and represented by the stock
certificate numbers set forth on, Exhibit A hereto, and all additional shares of
                                  ---------
stock of each Subsidiary of Pledgor owned by Pledgor from time to time or
acquired by Pledgor in any manner.

Except as specifically defined herein, all capitalized terms used herein that
are defined in the Loan Agreement shall have the meanings ascribed to them in
the Loan Agreement.  Unless otherwise defined in this Section 1, terms that are
defined in Chapter 1308 or 1309 of the Ohio Revised Code, as in effect from time
to time, are used herein as so defined.

     2.   Security Interest.  Pledgor hereby grants to Agent, for the benefit of
          -----------------
the Banks, a security interest in the Collateral as security for the Debt.  For
the better protection of Agent and the Banks hereunder, Pledgor has executed
appropriate transfer powers, in the form of Exhibit B hereto, with respect to
                                            ---------
the Pledged Securities and, concurrently herewith, is depositing the Pledged
Securities and the aforesaid transfer powers with Collateral Agent (as defined
in the Loan Agreement), for the benefit of the Banks.  Pledgor authorizes Agent,
at any time after the occurrence of an Event of Default, to transfer the Pledged
Securities into the name of Agent or Agent's nominee, but Agent shall be under
no duty to do so.  Notwithstanding any provision or inference herein or
elsewhere to the contrary, Agent shall have no right to vote the Pledged
Securities at any time unless and until there shall have occurred an Event of
Default.

                                      112
<PAGE>

     3.   Pledgor's Representations and Warranties.  Pledgor represents and
          ----------------------------------------
warrants to Agent and the Banks as follows:

     3.1. Pledgor is the legal record and beneficial owner of, and has good and
marketable title to, the Pledged Securities, and the Pledged Securities are not
subject to any pledge, lien, mortgage, hypothecation, security interest, charge,
option, warrant, or other encumbrance whatsoever, nor to any agreement
purporting to grant to any third party a security interest in the property or
assets of Pledgor that would include such Pledged Securities, except the
security interest created by this Agreement or otherwise securing only Agent and
the Banks.

     3.2. All of the Pledged Securities have been duly authorized and validly
issued, and are fully paid and non-assessable.

     3.3. Pledgor has full power, authority and legal right to pledge all of the
Pledged Securities pursuant to the terms of this Agreement.

     3.4. No consent, license, permit, approval or authorization, filing or
declaration with any governmental authority, domestic or foreign, and no consent
of any other Person, is required to be obtained by Pledgor in connection with
the pledge of the Pledged Securities hereunder, which has not been obtained or
made, and is not in full force and effect.

     3.5. Except as permitted pursuant to the Loan Agreement, the pledge,
assignment and delivery of the Pledged Securities hereunder creates a valid
first lien on, and a first perfected security interest in, the Pledged
Securities and the proceeds thereof.

     3.6. Except as expressly permitted pursuant to Section 5.22 of the Loan
Agreement, the Pledged Securities constitute one hundred percent (100%) of the
outstanding capital stock of each Subsidiary of Pledgor.

     3.7. Pledgor fully anticipates that the Debt will be repaid without the
necessity of selling the Pledged Securities.

     3.8. Pledgor has received consideration that is the reasonable equivalent
value of the obligations and liabilities that Pledgor has incurred to Agent and
the Banks.  Pledgor is not insolvent as defined in any applicable state or
federal statute, nor will Pledgor be rendered insolvent by the execution and
delivery of this Agreement to Agent for the benefit of the Banks.  Pledgor is
not engaged or about to engage in any business or transaction for which the
assets retained by Pledgor are or will be an unreasonably small amount of
capital, taking into consideration the obligations to Agent and the Banks
incurred hereunder.  Pledgor does not intend to incur debts beyond Pledgor's
ability to pay them as they mature.

     3.9. If the Pledged Securities are "restricted" within the meaning of Rule
144, or any amendment thereof, promulgated under the Securities Act of 1933, as
amended (the "Securities Act"), as determined by counsel for Agent, Pledgor
further represents and warrants that (a) Pledgor has been the beneficial owner
of the Pledged Securities for a period of at least three (3)

                                      113
<PAGE>

years prior to the date hereof, (b) the full purchase price or other
consideration for the Pledged Securities has been paid or given at least three
(3) years prior to the date hereof, and (c) Pledgor does not have a short
position in or any put or other option to dispose of any securities of the same
class as the Pledged Securities or any other securities convertible into
securities of such class.

     4.   Event of Default.  If an Event of Default shall occur hereunder,
          ----------------
Agent, on behalf of the Banks, may, in Agent's discretion and upon such terms
and in such manner as Agent shall deem advisable, sell, assign, transfer and
deliver the Collateral, or any part thereof, and, in each case, Agent shall
apply the net proceeds of the sale thereof to the Debt, whether or not due, by
such allocation as to item and maturity as Agent, in Agent's discretion, may
deem advisable.  No prior notice need be given to Pledgor or any other Person in
the case of any sale of Collateral that Agent in good faith determines to be
declining speedily in value or that is customarily sold at any securities
exchange or in the over-the-counter market or in any other recognized market;
but, in any other case, Agent shall give Pledgor not fewer than five (5)
Business Days prior notice of either the date after which any intended private
sale may be made or the time and place of any intended public sale.  Pledgor
waives advertisement of sale and, except to the extent required by the preceding
sentence, waives notice of any kind in respect of any sale.  At any public sale,
Agent or any of the Banks may purchase the Collateral, or any part thereof, free
from any right of redemption, which rights are hereby waived and released.

     5.   Term of Agreement.  Irrespective of any action, omission or course of
          -----------------
dealing whatever by Agent or the Banks, this Agreement shall remain in full
force and effect until the Debt shall have been paid in full.  Without limiting
the generality of the foregoing, Pledgor (a) agrees that neither Agent nor any
Bank shall have any duty to make any presentment or collection, or to preserve
any right of any kind, with reference to the Collateral, and (b) agrees that
Agent and the Banks shall at all times have the right to grant any indulgence to
Borrower and to deal in any other manner with Borrower, including the granting
of any extension, renewal or increase of the Debt or any part thereof, the
increase or decrease of any rate of interest, the forbearance from exercising
any right, power, or privilege, including any right to demand security, the
release of, or forbearance from proceeding against, any security or any obligor,
the effecting of any other release, compromise or settlement, the substitution
of security (even if of a different character or value), and (c) waives notice
of the creation of any Debt, of any default under any Note or other instrument
evidencing the Debt or any part thereof, of any act, omission, or course of
dealing by Agent and the Banks, and any other notice to which Pledgor might be
entitled to but for the within waiver.

     6.   Additional Covenants of Pledgor.
          -------------------------------

     6.1. Pledgor covenants and agrees to defend the right, title and security
interest of Agent and the Banks in and to the Pledged Securities and the
proceeds thereof, and to maintain and preserve the lien and security interest
provided for by this Agreement against the claim and demands of all Persons, so
long as this Agreement shall remain in effect.

                                      114
<PAGE>

     6.2. Pledgor covenants and agrees not to sell, assign, transfer, exchange,
or otherwise dispose of, or grant any option with respect to, or create, incur
or permit to exist any pledge, lien, mortgage, hypothecation, security interest,
charge, option or any other encumbrance with respect to any of the Pledged
Securities, or any interest therein, or any proceeds thereof, except for the
lien and security interest provided for by this Agreement and any security
agreement securing only Agent and the Banks.

     6.3. Pledgor covenants and agrees (a) to cooperate, in good faith, with
Agent and the Banks and to do or cause to be done all such other acts as may be
necessary to enforce the rights of Agent and the Banks under this Agreement, (b)
not to take any action, or to fail to take any action that would be adverse to
the interest of Agent and the Banks in the Collateral and hereunder, and (c) to
make any sale or sales of any portion or all of the Pledged Securities valid and
binding and in compliance with any and all applicable laws, regulations, orders,
writs, injunctions, decrees or awards of any and all courts, arbitrators or
governmental instrumentalities, domestic or foreign, having jurisdiction over
any such sale or sales at Pledgor's expense.

     7.   Events of Default.  An Event of Default shall exist hereunder if (a)
          -----------------
the Debt, or any portion thereof, shall not be paid in full when due and
payable, whether due by lapse of time or acceleration of maturity or otherwise,
(b) an Event of Default, as defined in the Loan Agreement, shall exist under the
Loan Agreement, (c) Pledgor shall fail to fully perform or omit to perform in
any material respect any agreement or other provision contained or referred to
in this Agreement, or (d) any representation, warranty or statement made in or
pursuant to this Agreement, shall be false or erroneous in any material respect.

     8.   Attorney-in-Fact.  Pledgor hereby authorizes and empowers Agent, on
          ----------------
behalf of the Banks, to make, constitute and appoint any officer or agent of
Agent as Agent may select, in its exclusive discretion, as Pledgor's true and
lawful attorney-in-fact, with the power to endorse Pledgor's name on all
applications, documents, papers and instruments necessary for Agent to take
actions with respect to the Collateral after the occurrence of an Event of
Default, including, without limitation, actions necessary for Agent to assign,
pledge, convey or otherwise transfer title in or dispose of the Collateral to
any Person.  Pledgor ratifies all that such attorney shall lawfully do or cause
to be done by virtue hereof.  This power of attorney shall be irrevocable for
the life of this  Agreement.

     9.   Maximum Liability of Pledgor.
          ----------------------------

     9.1. Pledgor's Liability Limited in Amount. Subject to subsection 9.5
          --------------------------------------
hereof, but otherwise notwithstanding anything to the contrary contained in this
Agreement, the maximum amount of the Debt secured by this Agreement shall not
exceed the sum of (a) that portion of the Loan the proceeds of which are used by
Borrower to make Valuable Transfers (as hereinafter defined) to Pledgor, plus
(b) ninety-five percent (95%) of the Adjusted Net Worth (as hereinafter
defined), but only to the extent that the Adjusted Net Worth is a positive
number, of Pledgor at the date of this Agreement.

                                      115
<PAGE>

     9.2. Definition of Terms Used in Section 9. For purposes of this Section 9:
          --------------------------------------
          "Adjusted Net Worth" shall mean, as of any date of determination
thereof, the excess of (a) the amount of the fair saleable value (or fair
valuation if relevant under applicable law) of the assets of Pledgor as of the
date of such determination, determined in accordance with applicable federal and
state laws governing determinations of insolvency of debtors, over (b) the
amount of all liabilities of Pledgor, contingent or otherwise, as of the date of
such determination, determined in accordance with applicable federal and state
law as referenced in the preceding clause (a), and in all events prior to giving
effect to Valuable Transfers.

          "Incurred Amount" shall mean the maximum amount for which Pledgor may
be liable under this Agreement (after giving effect to the incurring of the
obligations under this Agreement and to any rights to contribution of Pledgor
from other affiliates of Borrower) without rendering the rights to payment
hereunder of Bank void, voidable or avoidable under any applicable fraudulent
transfer law.

          "Valuable Transfer" shall mean (a) all loans, advances or capital
contributions made to Pledgor with proceeds of the Loan; (b) the fair market
value of all property acquired with proceeds of the Loan and transferred to
Pledgor; (c) the interest on and the fees in respect of the Loan, the proceeds
of which are used to make such a Valuable Transfer; and (d) the value of any
quantifiable economic benefits not included in clauses (a) through (c) above,
but includable in accordance with applicable federal and state laws governing
determinations of the insolvency of debtors, accruing to Pledgor as a result of
the Loan.

     9.3. Debt May Exceed Pledgor's Maximum Liability. Pledgor agrees that the
          --------------------------------------------
Debt may at any time and from time to time exceed the maximum amount of the Debt
secured by this Agreement without impairing this Agreement or affecting the
rights and remedies of Agents or the Banks hereunder.

     9.4. Pledgor's Liability Not Reduced by Payments by Others. No payment or
          ------------------------------------------------------
payments made by Borrower, Pledgor or any other Person or received or collected
by Agents or the Banks from Borrower, Pledgor or any other Person by virtue of
any action or proceeding or any set-off or appropriation or application at any
time or from time to time in reduction of or in payment of the Debt shall be
deemed to modify, reduce, release or otherwise affect the amount of the Debt
secured by this Agreement and this Agreement shall, notwithstanding any such
payment or payments (other than payments made to Agents or the Banks by Pledgor
or payments received or collected by Agents or the Banks from Pledgor), secure
the Debt up to the maximum amount of the Debt secured by this Agreement as set
forth above until the Debt is indefeasibly paid in full in cash.

     9.5. Adjustments to Maximum Liability.  Anything in this Section 9 to the
          ---------------------------------
contrary notwithstanding, in no event shall the amount of the Debt secured by
this Agreement as set forth in subsections 9.1 through 9.4 hereof exceed the
Incurred Amount; and further provided that, if a greater amount of the Debt than
the maximum liability set forth in this Section 9, (a) could be secured by
Pledgor as a result of an increase in Pledgor's Adjusted Net Worth subsequent to
the date hereof, and (b) is equal to or less than the Incurred Amount, then the
amount of Pledgor's

                                      116
<PAGE>

maximum liability calculated in subsection 9.1 hereof shall be calculated based
upon Pledgor's Adjusted Net Worth on such later date, rather than the date of
execution of this Agreement.

     10.  Costs and Expenses.  If Pledgor fails to comply with any of its
          ------------------
obligations hereunder, Agent may do so in Pledgor's name or in Agent's name, but
at Pledgor's expense, and Pledgor hereby agrees to reimburse Agent and the Banks
in full for all expenses, including reasonable attorneys' fees, incurred by
Agent and the Banks in protecting, defending and maintaining the Collateral.
Without limiting the foregoing, any and all reasonable fees, costs and expenses,
of whatever kind or nature, including the reasonable attorneys' fees and
expenses incurred in connection with the filing or recording of any documents
(including all taxes in connection therewith) in public offices, the payment or
discharge of any taxes, maintenance fees, encumbrances or otherwise protecting,
maintaining or preserving the Collateral, or in defending or prosecuting any
actions or proceedings arising out of or related to the Collateral, shall be
borne and paid by Pledgor on demand by Agent.

     11.  Notice. All notices, requests, demands and other communications
          ------
provided for hereunder shall be in writing and, if to Pledgor, mailed or
delivered to it, addressed to it at the address specified on the signature page
of this Agreement, if to Agent or a Bank, mailed or delivered to it, addressed
to the address of Agent or such Bank specified on the signature pages of the
Loan Agreement. All notices, statements, requests, demands and other
communications provided for hereunder shall be given by overnight delivery or
first class mail with postage prepaid by registered or certified mail, addressed
as aforesaid, or sent by facsimile with telephonic confirmation of receipt,
except that notices pursuant to any of the provisions hereof shall not be
effective until received.

     12.  No Subrogation.  Pledgor shall have no rights against Borrower with
          --------------
respect to this Agreement or the Pledged Securities and shall have no right of
subrogation and hereby waives any right to enforce any remedy that Agent or the
Banks now has or may hereafter have against Borrower, any endorser or any other
guarantor of all or any part of the Debt, and Pledgor hereby waives all setoffs
and counterclaims and all presentments, demands for performance, notices of
nonperformance, protests, notices of protest, notices of dishonor, and notices
of acceptance of this Agreement.  Pledgor further waives all notices of the
existence, creation or incurring of new or additional indebtedness, arising
either from additional loans extended to Borrower or otherwise, and also waives
all notices that the principal amount, or any portion thereof, and/or any
interest on any instrument or document evidencing all or any part of the Debt is
due, notices of any and all proceedings to collect from the maker, any endorser
or any other guarantor of all or any part of the Debt, or from any other Person,
and, to the extent permitted by law, notices of exchange, sale, surrender or
other handling of any security or collateral given to Bank to secure payment of
the Debt.

     13.  Interpretation.  Each right, power or privilege specified or referred
          --------------
to in this Agreement is in addition to any other rights, powers and privileges
that Agent or the Banks may have or acquire by operation of law, by other
contract or otherwise.  No course of dealing in respect of, nor any omission or
delay in the exercise of, any right, power or privilege by Agent and the Banks
shall operate as a waiver thereof, nor shall any single or partial exercise
thereof preclude any further or other exercise thereof

                                      117
<PAGE>

or of any other, as each right, power or privilege may be exercised by Agent and
the Banks either independently or concurrently with other rights, powers and
privileges and as often and in such order as Agent and the Banks may deem
expedient. No waiver or consent granted by Agent and the Banks in respect of
this Agreement shall be binding upon Agent or the Banks unless specifically
granted in writing, which writing shall be strictly construed.

     14.  Assignment and Successors.  This Agreement shall not be assigned by
          -------------------------
Pledgor without the prior written consent of Agent.  This Agreement shall bind
the successors and permitted assigns of Pledgor and shall benefit the respective
successors and assigns of Agent and the Banks.

     15.  Governing Law.  The provisions of this Agreement, and the respective
          -------------
rights and duties of Pledgor, Agent and the Banks hereunder, shall be governed
by the laws of the State of Ohio, without regard to principles of conflict of
laws.

     16.  Severability.  If, at any time, one or more provisions of this
          ------------
Agreement is or becomes invalid, illegal or unenforceable in whole or in part,
the validity, legality and enforceability of the remaining provisions shall not
in any way be affected or impaired thereby.

     17.  DESIGNATED SENIOR INDEBTEDNESS.  THE INDEBTEDNESS EVIDENCED BY THIS
AGREEMENT, THE LOAN AGREEMENT, EACH OF THE NOTES, AND EACH OTHER LOAN DOCUMENT
IS AND SHALL AT ALL TIMES CONSTITUTE "DESIGNATED SENIOR INDEBTEDNESS" UNDER THE
PROVISIONS OF THAT CERTAIN INDENTURE, DATED AS OF FEBRUARY 1, 1999, AS AMENDED,
AMONG OGLEBAY NORTON COMPANY, THE GUARANTORS NAMED THEREIN AND NORWEST BANK
MINNESOTA, NATIONAL ASSOCIATION, AS TRUSTEE.

                 [Remainder of page intentionally left blank.]

                                      118
<PAGE>

     18.  JURY TRIAL WAIVER.  PLEDGOR WAIVES ANY RIGHT TO HAVE A JURY
          -----------------
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT OR
OTHERWISE, AMONG PLEDGOR, AGENT AND THE BANKS, OR ANY OF THEM, ARISING OUT OF,
IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED
AMONG THEM IN CONNECTION WITH THIS AGREEMENT OR ANY NOTE OR OTHER INSTRUMENT,
DOCUMENT OR AGREEMENT EXECUTED OR DELIVERED IN CONNECTION THEREWITH OR THE
TRANSACTIONS RELATED THERETO.

     Executed and delivered at Cleveland, Ohio, as of the 3rd day of April,
2000.

Address:  1100 Superior Avenue
          Cleveland, Ohio 44114
          Attention: Treasurer

                                      119
<PAGE>

                                   EXHIBIT A

                              PLEDGED SECURITIES

Name of Corporation           Number of Shares          Certificate Number
-------------------           ----------------          ------------------

                                      120
<PAGE>

                                   EXHIBIT B

                         FORM OF STOCK TRANSFER POWER


     FOR VALUE RECEIVED, __________________________________ hereby sells,
assigns and transfers unto ___________________ (_______ ) Shares of the
_________________________ Capital Stock of
___________________________________________ standing in ___________ name on the
books of said corporation and represented by Certificate No. _________ herewith
and does hereby irrevocably constitute and appoint
______________________________ attorney to transfer the said stock on the books
of the within named corporation with full power of substitution in the premises.




Dated:____________________


                                             And by:

                                      121
<PAGE>

                                   EXHIBIT J

                 COLLATERAL AGENCY AND INTERCREDITOR AGREEMENT

     THIS COLLATERAL AGENCY AND INTERCREDITOR AGREEMENT (as the same may from
time to time be amended, restated or otherwise modified, this "Agreement"), is
made as of the __ day of April, 2000, by and among KEYBANK NATIONAL ASSOCIATION,
as administrative agent for the Credit Agreement Banks (as hereinafter defined)
("Credit Agreement Agent"), KEYBANK NATIONAL ASSOCIATION, as administrative
agent for the Loan Agreement Banks (as hereinafter defined) ("Loan Agreement
Agent"), and KEYBANK NATIONAL ASSOCIATION, as collateral agent under this
Agreement for the Banks (as hereinafter defined) (including any successor
collateral agent pursuant to the terms hereof, "Collateral Agent").

     WHEREAS, the Credit Agreement Banks have extended and will continue to
extend credit to OGLEBAY NORTON COMPANY, a Delaware corporation (together with
its successors and assigns, "Borrower") and its Subsidiaries, as defined in the
Credit Agreement (as hereinafter defined), pursuant to the terms and conditions
of the Credit Agreement;

     WHEREAS, concurrently herewith, the Loan Agreement Banks are entering into
the Loan Agreement (as hereinafter defined) with Borrower pursuant to which the
Loan Agreement Banks will make the Term Loan, as defined in the Loan Agreement,
to Borrower, for the benefit of Borrower and its Subsidiaries;

     WHEREAS, the Credit Agreement Banks and the Loan Agreement Banks desire to
establish their respective priorities with respect to the Collateral (as
hereinafter defined); and

     WHEREAS, Borrower understands that the Banks (as hereinafter defined) are
willing to grant such financial accommodations to Borrower pursuant to the
Credit Agreement and the Loan Agreement only upon certain terms and conditions,
one of which is that the parties hereto enter into this Agreement;

     NOW, THEREFORE, in consideration of the foregoing premises and other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

     1.   DEFINITIONS.  As used in this Agreement, the following terms shall
have the following meanings:

          "Agents" shall mean, collectively, Credit Agreement Agent and Loan
     Agreement Agent.  The term "Agents" shall not include Collateral Agent.

                                      122
<PAGE>

          "Banks" shall mean, collectively, the Credit Agreement Banks and the
     Loan Agreement Banks.

          "Bank Group" shall mean the Credit Agreement Banks or the Loan
     Agreement Banks.

          "Collateral" shall mean, collectively, (a) the Credit Agreement
     Collateral, (b) the Loan Agreement Collateral, and (c) any other property,
     whether tangible or intangible, at any time securing the Obligations, or
     any part thereof.

          "Combined Majority Banks" shall mean both (a) the Majority Banks, as
     defined in the Credit Agreement, under the Credit Agreement, and (b) the
     Majority Banks, as defined in the Loan Agreement, under the Loan Agreement.

          "Credit Agreement" shall mean the Credit Agreement, dated as of May
     15, 1998, as amended and restated as of April 3, 2000, among Borrower,
     Credit Agreement Agent and each of the Credit Agreement Banks, as the same
     may from time to time be further amended, restated or otherwise modified.

          "Credit Agreement Bank" shall mean any Bank, as defined in the Credit
     Agreement.

          "Credit Agreement Collateral" shall mean any property, whether
     tangible or intangible, at any time securing the Credit Agreement Debt, or
     any part thereof, whether owned by Borrower, any Pledgor or any other
     obligor, including, but not limited to (a) all of the Collateral, as
     defined in each of the respective Security Documents (as defined in the
     Credit Agreement) executed by Borrower and each Pledgor, (b) all of the
     Mortgaged Real Property (as defined in the Credit Agreement), and (c) all
     of the Documented Vessels (as defined in the Credit Agreement).

          "Credit Agreement Debt" shall mean the Debt, as defined in the Credit
     Agreement.

          "Event of Default" shall mean an Event of Default, as defined in the
     Credit Agreement, or an Event of Default, as defined in the Loan Agreement.

          "Loan Agreement" shall mean the Loan Agreement, dated as of April 3,
     2000, among Borrower, Loan Agreement Agent, and each of the Loan Agreement
     Banks, as the same may from time to time be amended, restated or otherwise
     modified.

          "Loan Agreement Bank" shall mean any Bank, as defined in the Loan
     Agreement.

          "Loan Agreement Collateral" shall mean any property, whether tangible
     or intangible, at any time securing the Loan Agreement Debt, or any part
     thereof, whether owned by Borrower, any Pledgor or any other obligor,
     including, but not limited to (a) all

                                      123
<PAGE>

     of the Collateral, as defined in each of the respective Security Documents
     (as defined in the Loan Agreement) executed by Borrower and each Pledgor,
     (b) all of the Mortgaged Real Property (as defined in the Loan Agreement),
     and (c) all of the Documented Vessels (as defined in the Loan Agreement).

          "Loan Agreement Debt" shall mean the Debt, as defined in the Loan
     Agreement.

          "Loan Documents" shall mean, collectively, the Loan Documents, as
     defined in the Credit Agreement, and the Loan Documents, as defined in the
     Loan Agreement.

          "Obligations" shall mean, collectively (a) the Credit Agreement Debt,
     (b) the Loan Agreement Debt, and (c) all other indebtedness or other
     obligations now owing or hereafter incurred by Borrower or any Pledgor to
     Collateral Agent pursuant to this Agreement.

          "Pledgor" shall mean any Pledgor, as defined in the Credit Agreement,
     or any Pledgor, as defined in the Loan Agreement.

          "Pro Rata" shall mean, with respect to the Credit Agreement Banks or
     the Loan Agreement Banks, the percentage that is determined by dividing the
     aggregate amount of the Credit Agreement Debt or the aggregate amount of
     the Loan Agreement Debt, as appropriate, outstanding at the time of
     determination, by the sum of the Credit Agreement Debt and the Loan
     Agreement Debt outstanding at the time of such determination.

     2.   APPOINTMENT OF COLLATERAL AGENT.  Each of (a) Borrower, (b) Credit
Agreement Agent, on behalf of the Credit Agreement Banks, and (c) Loan Agreement
Agent, on behalf of the Loan Agreement Banks, hereby appoints KeyBank National
Association as Collateral Agent under this Agreement, with such powers as are
specifically delegated to Collateral Agent by the terms of this Agreement,
together with such other powers as are reasonably incidental thereto in order to
carry out the intent of this Agreement, in the opinion of Collateral Agent, and
KeyBank National Association hereby accepts such appointment as Collateral Agent
under this Agreement.

     3.   PRO RATA DISTRIBUTION OF COLLATERAL.  The Collateral shall serve as
security for the Obligations.  Subject to the terms of this Agreement,
Collateral Agent shall receive, hold, administer and enforce this Agreement, and
foreclose upon, collect, dispose of all or any part of the Collateral, and
deliver to Credit Agreement Agent and Loan Agreement Agent, the proceeds
therefrom, after deducting all amounts owing to Collateral Agent under this
Agreement, for the Pro Rata benefit of the respective Bank Groups.  Each Agent
agrees on behalf of such Agent and its Bank Group that any security interest or
lien granted to such Agent with respect to the Collateral, or any part thereof,
shall be deemed to be held by such Agent for the benefit of all of the Banks
pursuant to the terms of this Agreement.

     4.   DELIVERY OF COLLATERAL TO COLLATERAL AGENT.  If any Agent or any Bank
receives possession of any portion of the Collateral, or any proceeds thereof,
such

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Agent or Bank, as the case may be, shall receive and hold the same in trust for
Collateral Agent to be disposed of in accordance with the terms of this
Agreement.

     5.   APPOINTMENT OF POWER OF ATTORNEY.  Each Agent irrevocably authorizes,
appoints, and empowers Collateral Agent to act as such Agent's attorney-in-fact
with respect to the Collateral or any part thereof or under or with respect to
any of the Loan Documents, as Collateral Agent may deem reasonably necessary or
advisable for the enforcement of this Agreement or to otherwise carry out the
intent of this Agreement; and each Agent shall execute and deliver to Collateral
Agent such powers of attorney, assignments, or other instruments as may be
reasonably requested by Collateral Agent to enable Collateral Agent to enforce
any and all of Collateral Agent's rights or duties under this Agreement.

     6.   EVENT OF DEFAULT.  Upon the occurrence of an Event of Default, the
Combined Majority Banks may notify and direct Collateral Agent to enforce the
rights of Agents and the Banks in and to the Collateral through such remedies as
may be available pursuant to the terms and conditions of any Loan Document, at
law or in equity, or otherwise.

     7.   AUTHORIZATION OF AGENTS.   Credit Agreement Agent represents and
warrants to Collateral Agent that Credit Agreement Agent is authorized pursuant
to the terms and conditions of the Credit Agreement to enter into this Agreement
on behalf of the Credit Agreement Banks.  Loan Agreement Agent represents and
warrants to Collateral Agent that Loan Agreement Agent is authorized pursuant to
the terms and conditions of the Loan Agreement to enter into this Agreement on
behalf of the Loan Agreement Banks.

     8.   LIEN PRIORITIES.  Notwithstanding the date, manner or order of
perfection of the security interests and liens granted to Collateral Agent or
either Agent, and notwithstanding any provisions of any Loan Documents, the
Uniform Commercial Code as in effect in any state or any applicable law or
decision, or whether Collateral Agent or either Agent holds possession of all or
any part of the Collateral, whether by itself or by any bailee or agent acting
on its behalf, each of the parties to this Agreement agrees that the Banks shall
share pari passu in all of the Collateral, with any such Collateral being
distributed in accordance with Section 3 of this Agreement.

     9.   OBLIGATIONS UNAFFECTED; ADDITIONAL SECURITY.  Except as specifically
set forth herein, the Credit Agreement and the Loan Agreement shall be
unaffected hereby.  Borrower, Agent and the Banks shall be entitled to amend,
restate or otherwise modify any of the Loan Documents in accordance with the
respective terms of each such Loan Document; provided, however, that, in the
event that any Agent or Bank shall receive any additional Collateral or other
security for any of the Obligations or file any additional financing statement,
mortgage or other lien with respect thereto, such collateral or other security
shall become part of the Collateral hereunder and shall be held in trust for the
Pro Rata benefit of both Bank Groups, subject to the terms and conditions of
this Agreement.  Collateral Agent is authorized to release any part of the
Collateral under this Agreement if Credit Agreement Agent, Loan Agreement Agent
or Collateral Agent are permitted to do so in accordance with the respective
terms of the Credit Agreement or Loan Agreement.

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     10.  CONTESTING LIENS OR SECURITY INTERESTS.  None of Collateral Agent,
either Agent, nor any Bank shall contest the validity, perfection, priority or
enforceability of any lien or security interest granted to any Agent or
Collateral Agent.

     11.  ACTIONS BY COLLATERAL AGENT.  Agents acknowledge that (a) that each
Bank has performed and will continue to perform its own credit analysis of
Borrower and each Pledgor and its own investigations of the risks involved in
the transactions contemplated by the obligations and in entering into this
Agreement, (b) each Bank has reviewed and approved the form and substance of
each of the Loan Documents, including any UCC financing statements filed in
connection with any of the Loan Documents, and (c) Collateral Agent, by
executing this Agreement, has not nor at any time shall Collateral Agent be
deemed to have made any representation or warranty, express or implied, with
respect to the (i) due execution, authenticity, legality, accuracy,
completeness, validity or enforceability of any of the Loan Documents or as to
the financial condition or creditworthiness of Borrower or any Pledgor, or the
collectability of the Obligations, or (ii) validity, perfection, priority,
enforceability, value or sufficiency of, or title to any of the Collateral, or
the filing, or recording, or taking of any other actions with respect to the
Collateral.  Although Collateral Agent will endeavor to exercise the same care
in administering the Collateral as if the Collateral Agent were acting for its
own account, Collateral Agent shall be fully protected in relying upon any
document that appears to it to be genuine and upon the advice of legal counsel,
independent accountants and other appropriate experts (including those retained
by Borrower).  Neither Collateral Agent nor any of its affiliates, directors,
officers, attorneys or employees shall be liable for any action taken or omitted
to be taken by it or them hereunder or in connection herewith, except for its or
their own gross negligence or willful misconduct.

     12   BANKRUPTCY FILING.  This Agreement shall be applicable both before and
after the filling of any petition by or against Borrower or any Pledgor under
the bankruptcy code and all references in this Agreement to Borrower or any
Pledgor shall be deemed to apply to Borrower or such Pledgor as debtor-in-
possession and all distributions of the proceeds of any of the Collateral shall,
subject to applicable law and to any court order approving the financing of
Borrower or any Pledgor as debtor-in-possession, continue to be made after the
filing of any such petition on the same basis that the distribution of such
Collateral was to be distributed prior to the date of such petition.

     13.  INDEMNIFICATION.  To the extent not indemnified or reimbursed by
Borrower, Agents, on behalf of their respective Bank Groups, agree to indemnify,
based upon their respective Pro Rata percentages of the Obligations, and hold
Collateral Agent harmless against any and all losses, costs and expenses
(including, without limitation, attorneys' fees) and liabilities incurred by
Collateral Agent, and the directors, officers, employees, attorneys, affiliates
and subsidiaries of Collateral Agent, in connection with or arising in any
manner from Collateral Agent's performance of Collateral Agent's duties or
exercise of rights of Collateral Agent under this Agreement; provided, however,
that Collateral Agent shall not be indemnified or reimbursed for any such
liabilities caused as a result of its own gross negligence or willful
misconduct.

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     14.  THIRD PARTIES.  Nothing contained in this Agreement is intended to
affect or limit in any way the respective security interests or liens of Agents
on behalf of the Banks with respect to Borrower, any Pledgor or any other person
or entity.  This Agreement is solely for the benefit of Agents and the Banks and
is not intended to grant any rights, benefits or defenses to or for the benefit
of any Pledgor or any other person or entity.  Borrower and each Pledgor are
signing this Agreement solely for the purpose of acknowledging and agreeing to
the rights and obligations of the Agents, the Banks and Collateral Agent.
Neither Borrower nor any other Company shall have any rights hereunder.

     15.  SUCCESSORS AND ASSIGNS.  This Agreement shall inure to the benefit of,
and be binding on, the Agents, the Banks and Collateral Agent, and their
respective successors and assigns.  This Agreement may not be amended,
supplemented or otherwise modified in any respect except in a writing signed by
the Agents, acting with the consent of all of the Banks, and Collateral Agent.

     16.  SUCCESSOR COLLATERAL AGENT.  Collateral Agent may resign as collateral
agent hereunder by giving not fewer than thirty (30) days prior written notice
to Agents.  If Collateral Agent shall resign under this Agreement, then either
(a) the Combined Majority Banks shall appoint from among the Banks a successor
collateral agent hereunder, or (b) if a successor collateral agent shall not be
so appointed and approved within the thirty (30) day period following Collateral
Agent's notice to the Agents of its resignation, then Collateral Agent shall
appoint a successor collateral agent that shall serve as collateral agent until
such time as the Combined Majority Banks appoint a successor collateral agent.
Upon its appointment, such successor collateral agent shall succeed to the
rights, powers and duties as collateral agent, and the term "Collateral Agent"
under this Agreement and any other Loan Document shall mean such successor
effective upon its appointment, and the former collateral agent's rights, powers
and duties as collateral agent shall be terminated without any other or further
act or deed on the part of such former collateral agent or any of the parties to
this Agreement.

     17.  NOTICE.  All notices, requests, demands and other communications
provided for hereunder shall be in writing and, if to Borrower, any Agent or any
Bank, mailed or delivered to such party, addressed to the address of such party
specified on the signature page of the Credit Agreement or Loan Agreement, as
appropriate, if to Collateral Agent, mailed or delivered to it, addressed to the
address of Collateral Agent specified on the signature page of this Agreement.
All notices, statements, requests, demands and other communications provided for
hereunder shall be deemed to be given or made when delivered or forty-eight (48)
hours after being deposited in the mails with postage prepaid by registered or
certified mail, addressed as aforesaid, or sent by facsimile with telephonic
confirmation of receipt, except that notices pursuant to any of the provisions
hereof shall not be effective until received.

     18.  ENTIRE AGREEMENT.  This Agreement sets forth the entire agreement and
understanding among the parties as to the subject matter hereof and merges and
supersedes all prior discussions, agreements, and undertakings of every kind and
nature among them with respect to the subject matter hereof.

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     19.  TERMINATION.  This Agreement shall remain in full force and effect
until all of the Obligations have been indefeasibly paid in full, and the Credit
Agreement and the Loan Agreement terminated and not replaced by any other credit
facility with Credit Agreement Agent and the Credit Agreement Banks or  Loan
Agreement Agent and the Loan Agreement Banks.

     20.  GOVERNING LAW.  This Agreement shall be construed according to the
laws of the State of Ohio, without regard to principles of conflicts of laws.
Wherever possible each provision of this Agreement shall be interpreted in such
manner as to be effective and valid under applicable law, but if any provision
of this Agreement shall be prohibited by or invalid under such law, such
provision shall be ineffective to the extent of such prohibition or invalidity,
without invalidating the remainder of such provision or the remaining provisions
of this Agreement.

                 [Remainder of page intentionally left blank.]

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     21.  JURY TRIAL WAIVER..  THE UNDERSIGNED, TO THE EXTENT PERMITTED BY LAW,
          ------------------
WAIVE ANY RIGHT TO HAVE A JURY PARTICIPATE IN RESOLVING ANY DISPUTE WHETHER
SOUNDING IN CONTRACT, TORT, OR OTHERWISE, AMONG THE AGENTS, THE BANKS OR
COLLATERAL AGENT, OR ANY OF THEM, ARISING OUT OF, IN CONNECTION WITH, RELATED TO
OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THEM IN CONNECTION WITH
THIS AGREEMENT OR ANY DOCUMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH OR
THE TRANSACTIONS RELATED THERETO.

  IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the
3rd day of April, 2000.

                                    COLLATERAL AGENT:

Address:  127 Public Square         KEYBANK NATIONAL ASSOCIATION,
          Cleveland, Ohio 44114          as Collateral Agent
          Attn: Large Corporate
                  Banking Division  By:_________________________________

Title:____________________________

                                    CREDIT AGREEMENT AGENT:

                                    KEYBANK NATIONAL ASSOCIATION,
                                         as Credit Agreement Agent and on behalf
                                         of the Credit Agreement Banks

                                    By:_________________________________
Title:____________________________

                                    LOAN AGREEMENT AGENT:

                                    KEYBANK NATIONAL ASSOCIATION,
                                         as Loan Agreement Agent and on behalf
                                         of the Loan Agreement Banks

                                    By:_________________________________

Title:____________________________

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Each of the undersigned hereby acknowledges
the terms of and consents to the foregoing and
agrees to be bound by the terms hereof:

OGLEBAY NORTON COMPANY

By: ________________________________
Title:______________________________

ONCO INVESTMENT COMPANY

By: ________________________________
Title:______________________________

ON MARINE SERVICES COMPANY

By: ________________________________
Title:______________________________

OGLEBAY NORTON MARINE SERVICES COMPANY, L.L.C.

By: ________________________________
Title:______________________________

OGLEBAY NORTON SPECIALTY MINERALS, INC.

By: ________________________________
Title:______________________________

OGLEBAY NORTON MANAGEMENT COMPANY

By: ________________________________
Title:______________________________

OGLEBAY NORTON INDUSTRIAL SANDS, INC.

By: ________________________________
Title:______________________________

TEXAS MINING, LP

By: ________________________________
Title:______________________________

OGLEBAY NORTON TERMINALS, INC.

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By: ________________________________
Title:______________________________

OGLEBAY NORTON ENGINEERED MATERIALS, INC.

By: ________________________________
Title:______________________________

GLOBAL STONE CORPORATION

By: ________________________________
Title:______________________________

GLOBAL STONE PORT INLAND, INC.

By: ________________________________
Title:______________________________

GLOBAL STONE TENN LUTRELL COMPANY

By: ________________________________
Title:______________________________

GLOBAL STONE CHEMSTONE CORPORATION

By: ________________________________
Title:______________________________

GLOBAL STONE ST. CLAIR, INC.

By: ________________________________
Title:______________________________

GLOBAL STONE PENROC, LP

By: ________________________________
Title:______________________________

GS PC, INC.

By: ________________________________
Title:______________________________

GLOBAL STONE FILLER PRODUCTS, INC.

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By: ________________________________
Title:______________________________

GLOBAL STONE JAMES RIVER, INC.

By: ________________________________
Title:______________________________

OGLEBAY NORTON MINERALS, INC.

By: ________________________________
Title:______________________________

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