OWNERS AGREEMENT


                                     BETWEEN


                                   NSA, LTD.,
                         a Kentucky limited partnership,


                           GLENCORE ACQUISITION I LLC,
                      a Delaware limited liability company,

                                       AND


                        CENTURY ALUMINUM OF KENTUCKY LLC,
                      a Delaware limited liability company

                                   DATED AS OF


                                  APRIL 2, 2001




                                Table of Contents

                                                                          Page #

Article I DEFINITIONS..........................................................1

   Section 1.1    Definitions..................................................1

Article II JOINT USE; NO ENTITY; GUARANTEES....................................6

   Section 2.1    Joint Use....................................................6
   Section 2.2    Intent.......................................................7
      2.2.1    No Entity or Agency.............................................7
      2.2.2    Tax Election....................................................7
   Section 2.3    Joint Ownership; Waiver of Partition.........................7
      2.3.1    Ownership of Jointly-Owned Property as Tenants in Common........7
      2.3.2    Waiver of Partition.............................................7
      2.3.3    Disposition of Jointly-Owned Property, Owner's Plant Assets.....7
   Section 2.4    Parent Guarantees............................................7

Article III ACTION BY OWNERS; OWNERS COMMITTEE.................................8

   Section 3.1    Authority to Bind Owners.....................................8
      3.1.1    Action by Owners Required.......................................8
      3.1.2    Operator's Actions..............................................8
      3.1.3    No Unilateral Action............................................8
   Section 3.2    Owners Committee.............................................8
   Section 3.3    Appointment of Representatives...............................8
      3.3.1    Appointment Procedure...........................................8
      3.3.2    Dismissals and Replacements.....................................8
      3.3.3    General.........................................................9
   Section 3.4    Meetings of the Owners Committee; Written Consents in
                  Lieu of Meetings.............................................9
      3.4.1    Holding of Meetings.............................................9
      3.4.2    Quorum; Calling of Meetings.....................................9
      3.4.3    Written Consents................................................9
   Section 3.5    Intentionally Omitted........................................9
   Section 3.6    Voting Requirements..........................................9
      3.6.1    In General......................................................9
      3.6.2    Matters Requiring Unanimous Consent.............................9
   Section 3.7    Other Committees............................................11
   Section 3.8    Minutes.....................................................11
   Section 3.9    No Liability of Committee Members...........................11

Article IV OPERATIONS AND MANAGEMENT..........................................12

   Section 4.1    Intent......................................................12
   Section 4.2    Operations..................................................12
   Section 4.3    Compliance with Law.........................................12
   Section 4.4    Operator's Ownership of Intellectual Properties.............12




Article V FINANCIAL MANAGEMENT; MANAGEMENT FEE................................12

   Section 5.1    Budgets.....................................................12
   Section 5.2    Implementation of Approved Budgets..........................13
   Section 5.3    Emergency or Unexpected Expenditures........................13
   Section 5.4    Accounting Principles and Procedures........................13
   Section 5.5    Books, Records, Reports and Auditors........................13
      5.5.1    Books and Records..............................................13
      5.5.2    Reports........................................................13
      5.5.3    Auditors.......................................................13
   Section 5.6    Bank Accounts...............................................14
      5.6.1    Establishment of Accounts......................................14
      5.6.2    Deposits and Disbursements of Funds............................14
      5.6.3    Signatory Powers...............................................14
   Section 5.7    Charges.....................................................14
      5.7.1    Operating Costs................................................14
      5.7.2    Extras.........................................................15
      5.7.3    Calculation of Charges.........................................15
      5.7.4    Payment of Charges.............................................15
      5.7.5    Year End Adjustments...........................................16
      5.7.6    Resolution of Disputed Charges.................................16
      5.7.7    Financing and Other Costs......................................16
      5.7.9    Management Fee.................................................17

Article VI OBLIGATIONS OF THE OPERATOR........................................17

   Section 6.1    Plant Operation Services....................................17
   Section 6.2    Management Services.........................................19
   Section 6.3    Authorization to Act........................................19
   Section 6.4    Liability of the Operator...................................20

Article VII CONVERSION........................................................20

   Section 7.1    Conversion Rights and Obligations...........................20
      7.1.1    Obligation to Convert..........................................20
      7.1.2    Reduction of Basic Tonnage.....................................21
      7.1.3    Failure to Convert Basic Tonnage...............................21
      7.1.4    Available and Allocated Excess Tonnage.........................22
      7.1.5    Production Deficiencies........................................22
   Section 7.2    Alumina Supply..............................................22
      7.2.1    Alumina Delivery Obligations...................................22
      7.2.2    Unloading of Alumina...........................................22
      7.2.3    Quality of Alumina.............................................23
   Section 7.3    Title.......................................................23
   Section 7.4    Shipment, Delivery, Sampling and Weighing...................23
      7.4.1    Production Schedules and Deliveries............................23
      7.4.2    Failure to Take Delivery.......................................24
      7.4.3    Sampling, Analysis and Weights.................................24
      7.4.4    Storage........................................................25
      7.4.5    Markings.......................................................25
   Section 7.5    Cast House..................................................25
      7.5.1    Use of Equipment in Cast House.................................25


                                      -ii-


Article VIII INSURANCE AND CASUALTY...........................................26

   Section 8.1    Insurance...................................................26
      8.1.1    Coverage Requirements..........................................26
      8.1.2    Product Liability Coverage.....................................26
   Section 8.2    Casualty....................................................26
   Section 8.3    Condemnation................................................26

Article IX RESTRICTIONS ON DISPOSITION OF PROPERTY OR INTERESTS...............27

   Section 9.1    Transfers of Interests......................................27
      9.1.1    Restriction....................................................27
      9.1.2    Transfers to Affiliates........................................27
      9.1.3    Transferee to Become Party to this Agreement...................27
      9.1.4    Reconstitution of Interests....................................27
      9.1.5    Transfers of Part of an Interest...............................27
      9.1.6    Minimum Interest...............................................28
   Section 9.2    Voluntary Encumbrances......................................28
      9.2.1    Restrictions...................................................28
      9.2.2    Acknowledgment of Liens........................................28
      9.2.3    Condition Precedent to Enforcement of Voluntary Encumbrances...29
      9.2.4    Secured Party's Rights; Non-Granting Owners' Rights............29
   Section 9.3    Right of First Refusal......................................29
      9.3.1    Restrictions...................................................29
      9.3.2    Right and Procedure............................................30
   Section 9.4    Involuntary Transfers or Encumbrances.......................31
      9.4.1    Deemed Offer to Transfer.......................................31
      9.4.2    Fair Market Value..............................................32
   Section 9.5    Transfer of Ownership of an Owner...........................32
   Section 9.6    Appointment of Operator Upon Transfer.......................33
   Section 9.7    Closings....................................................33

Article X DEFAULT.............................................................33

   Section 10.1   Events of Default...........................................33
   Section 10.2   Constitution of Owners Committee Upon Event of Default......34
   Section 10.3   Notification of Secured Party; Right to Cure................34
   Section 10.4   Use of Defaulting Owner's Interest..........................34
      10.4.1   Right of Non-Defaulting Owner..................................34
      10.4.2   Non-Defaulting Owner's Costs, etc..............................35
   Section 10.5   Option to Purchase Defaulting Owner's Interest..............35
      10.5.1   Agreement on Liquidated Damages................................35
      10.5.2   Exercise of Right to Purchase..................................36
      10.5.3   "Gross Profits"; "Market Price"................................36
   Section 10.6   Attorney-in-Fact............................................36
   Section 10.7   Monetary Defaults...........................................37
   Section 10.8   Appointment of Operator.....................................37


                                     -iii-


Article XI COVENANTS..........................................................37

   Section 11.1   Inspection..................................................37
   Section 11.2   Liens.......................................................37
   Section 11.3   Notification................................................37
   Section 11.4   Performance of Contracts....................................38
   Section 11.5   Organization, Power and Authority...........................38
   Section 11.6   Easements...................................................38
   Section 11.7   Further Assurances..........................................38

Article XII REPRESENTATIONS...................................................39

   Section 12.1   Owners' Representations.....................................39
      12.1.1   Organization, Powers and Authority.............................39
      12.1.2   Compliance with Other Instruments..............................39
      12.1.3   Litigation.....................................................39

Article XIII MISCELLANEOUS....................................................39

   Section 13.1   Term........................................................39
   Section 13.2   Disposition of Plant and Other Assets.......................39
   Section 13.3   Liability...................................................40
   Section 13.4   Notices.....................................................40
   Section 13.5   Entire Agreement and Modification...........................41
   Section 13.6   Best Efforts and Cooperation................................42
   Section 13.7   Force Majeure...............................................42
   Section 13.8   Binding Effect..............................................42
   Section 13.9   Survival....................................................42
   Section 13.10  Governing Law...............................................42
   Section 13.11  Disputes....................................................42
   Section 13.12  Captions....................................................42
   Section 13.13  Singular and Plural.........................................43


                                      -iv-


                                OWNERS AGREEMENT

     THIS  AGREEMENT,  dated as of April 2, 2001,  between NSA, LTD., a Kentucky
limited  partnership  ("NSA"),  GLENCORE  ACQUISITION I LLC, a Delaware  limited
liability  company  ("GAC")  and Century  Aluminum  of Kentucky  LLC, a Delaware
limited liability company ("CAK").

                                    Recitals

     A. NSA and GAC  (collectively,  the "Owners") own, directly and indirectly,
all of the Plant.

     B.  The  Owners  desire  to  provide  for  the  operation,  management  and
maintenance of the Plant, as well as certain rights and obligations with respect
to  their  interests  therein,  all as more  fully  set  forth  in  this  Owners
Agreement.

     C. The Owners desire that CAK perform,  in its capacity as "Operator" under
this  Agreement  and on  behalf  and  for the  benefit  of the  Owners,  certain
responsibilities  of  the  Owners  and  provide  certain  additional  management
services, all as herein set forth.

     THE PARTIES AGREE AS FOLLOWS:

                                   Article I
                                   DEFINITIONS

     Section 1.1 Definitions. The following terms, whenever used and capitalized
herein, shall have the following meanings:

     "Acquisition  Agreement"  shall mean that certain asset purchase  agreement
dated as of April 2, 2001 by and between Century,  Century  Kentucky,  Inc., NSA
and Glencore providing for the purchase by GAC of GAC's Interest.

     "Affiliate"  shall  mean,  with  respect  to any Owner,  any  Person  which
directly or indirectly  controls,  is controlled  by, or is under common control
with,  such Owner.  For purposes of this  definition,  "control"  shall mean the
direct or indirect power to vote, or direct or determine the manner of voting by
others,  of one hundred  percent  (100%) of the shares of stock of a corporation
having  ordinary voting power (other than stock having such power only by reason
of the happening of a contingency),  or any other similar equity interest giving
the right to vote  with  respect  to  determining  the  management  or  business
policies of a Person which is not a corporation,  in each of the foregoing cases
whether  through  record or  beneficial  ownership of voting  securities or such
other equity interest, by contract or proxy, or otherwise.

     "Alumina" shall mean alumina meeting the minimum  specifications  set forth
in Exhibit A to this  Agreement  and shall also  include any alumina not meeting
such  specifications  which is  tendered  by an  Owner  and is  accepted  by the
Operator.

     "Aluminum Product" shall mean Molten Metal or Primary Aluminum.

     "Aluminum  Supply  Agreement"  shall  mean the  Aluminum  Supply  Agreement
entered into as of the date hereof by Century and Southwire,  as the same may be
amended, modified or supplemented from time to time.



     "Auditors" shall have the meaning specified in Section 5.5.3.

     "Available  Excess Tonnage" and "Allocated  Excess Tonnage" shall each have
the meanings specified in Section 7.1.4.

     "Basic Tonnage" of an Owner shall mean the percentage equal to that Owner's
Interest,  unless adjusted pursuant to this Agreement,  in the actual production
at the applicable time of Molten Metal at the Plant, calculated on a one hundred
percent (100%) aluminum basis.  Basic Tonnage shall not include Allocated Excess
Tonnage taken by a particular Owner.

     "Capital Lease  Obligations" shall mean, for any Person, all obligations of
such Person to pay rent or other  amounts  under a lease of (or other  agreement
conveying the right to use) Property to the extent such obligations are required
to be classified and accounted for as a capital lease on a balance sheet of such
Person under GAAP (including  Statement of Financial Account Standards No. 98 of
the Financial  Accounting Standards Board), and, for purposes of this Agreement,
the  amount  of  such  obligations  shall  be the  capitalized  amount  thereof,
determined in accordance with GAAP (including such Statement No. 98).

     "Cast House" shall mean the land, improvements and personal property at the
Plant for the casting of Molten Metal into Primary Aluminum.

     "Century" shall mean Century Aluminum Company, a Delaware corporation,  and
its successors.

     "Code" shall mean the Internal  Revenue Code of 1986,  as amended from time
to time.

     "Collective  Bargaining  Agreement"  shall mean the  collective  bargaining
agreement dated September 25, 2000 and effective as of the date hereof,  between
CAK and the United Steelworkers of America, AFL-CIO-CIC.

     "Employee Benefit Plans" shall have the meaning specified in Section 5.7.1.

     "Environmental   Access   and   Cooperation   Agreement"   shall  mean  the
Environmental  Access and Cooperation  Agreement  entered into by the Owners and
Southwire  as of the  date  hereof,  as the  same may be  amended,  modified  or
supplemented from time to time.

     "Extras" shall mean the following services in respect of the Plant: (i) any
special  service  performed  at the  request  of an Owner in the  conversion  of
Alumina,  (ii) any  manufacturing  process  required to cast  Molten  Metal into
Primary  Aluminum or as  otherwise  specified  by an Owner or any other  process
performed  at the request of an Owner to produce  any product  other than Molten
Metal, and (iii) transportation of Primary Aluminum from the Plant.

     "Fair Market Value" shall have the meaning specified in Section 9.4.2.

     "GAAP" shall mean U.S. generally accepted accounting principles.

     "Glencore" shall mean Glencore AG, a Swiss corporation.

     "Groundwater Treatment Building Lease Agreement" shall mean the Groundwater
Treatment  Building Lease Agreement entered into by the Owners with Southwire as
of the date hereof,  as the same may be amended,  modified or supplemented  from
time to time.


                                       2


     "Guarantee" shall mean a guarantee, an endorsement,  a contingent agreement
to purchase or to furnish funds for the payment or maintenance  of, or otherwise
to be or become  contingently liable under or with respect to, the Indebtedness,
net worth,  working  capital or earnings of any  Person,  or a guarantee  of the
payment of dividends or other  distributions  upon the stock or equity interests
of any Person or an agreement  to purchase,  sell or lease (as lessee or lessor)
Property  or  services  primarily  for the  purpose of enabling a debtor to make
payment  of such  debtor's  obligations  or an  agreement  to assure a  creditor
against  loss,  and  including,  without  limitation,  causing  a bank or  other
financial  institution to issue a letter of credit or similar instrument for the
benefit of another Person, but excluding  endorsements for collection or deposit
in the ordinary course of business.  The terms "Guarantee" and "Guaranteed" used
as a verb shall have a correlative meaning.

     "Indebtedness" shall mean, for any Person: (a) obligations created,  issued
or incurred by such Person for borrowed money (whether by loan, the issuance and
sale of debt  securities or the sale of Property to another Person subject to an
understanding or agreement, contingent or otherwise, to repurchase such Property
from such Person);  (b) obligations of such Person to pay the deferred  purchase
or acquisition price of Property or services,  other than trade accounts payable
(other than for borrowed money) arising,  and accrued  expenses  incurred in the
ordinary  course of business so long as such trade accounts  payable are payable
within  ninety  (90)  days of the date the  respective  goods  or  services  are
delivered  or  rendered;  (c)  Indebtedness  of others  secured by a Lien on the
Property of such Person,  whether or not the respective  Indebtedness so secured
has been assumed by such Person;  (d)  obligations  of such Person in respect of
letters of credit or similar  instruments  issued or accepted by banks and other
financial institutions for account of such Person; (e) Capital Lease Obligations
of such  Person;  and (f)  Indebtedness  of others  Guaranteed  by such  Person.
Notwithstanding the foregoing,  the term  "Indebtedness"  shall not include swap
agreements  entered  into  to  hedge  against  fluctuations  in  the  prices  of
commodities and currencies, deferred revenue accounts arising from forward sales
or Guarantees of either thereof.

     "Intellectual Properties" shall have the meaning specified in Section 4.4.

     "Interest",  as applied to an Owner, shall mean the entire interest of such
Owner and its  Affiliates  (i) as an owner of Property  comprising a part of the
Plant,  including without limitation the Owner's Plant Assets,  (ii) as an owner
of  membership  units in CAK,  (iii) as a tenant in common of the  Jointly-Owned
Property,   (iv)  in  this  Owners  Agreement,   including  in  respect  of  the
Intellectual  Properties,  (v) its joint  interest  with the other  Owner in any
agreements  in effect  from  time to time for the  supply  of  material  used to
produce Aluminum Product at the Plant or to sell such Aluminum Product, and (vi)
any other  rights  hereunder or  otherwise  of the Owner to  participate  in the
conversion  of alumina  into  aluminum at the Plant,  but shall not include such
Owner's  Inventory.  It is the intent of the Owners that they shall share all of
the  benefits and burdens of the  operation of the Plant pro rata in  accordance
with their respective Interests,  and for such purpose, in all instances in this
Agreement  in which the Owners'  Interests  are  expressed  with  reference to a
percentage or pro rata portion, the Interests, as of the date of this Agreement,
are agreed to be as follows:  NSA,  eighty percent (80%) and GAC, twenty percent
(20%).

     "Interest  Rate"  shall  mean the  United  States  prime  rate as quoted by
Reuters News Service on page US Prime, in effect from time to time calculated on
a daily basis.


                                       3


     "Interested Party" shall have the meaning specified in Section 9.4.2.

     "Inventory"  shall mean,  with respect to an Owner,  such Owner's  Alumina,
work-in-process  and Aluminum  Product  held at the Plant,  title to which shall
(subject  to such  Liens as may be  granted  thereon  by the Owner) at all times
remain with such Owner.

     "Jointly-Owned  Property"  shall  mean,  collectively,  (i)  such  personal
property  constituting  Plant Assets under the Acquisition  Agreement in which a
twenty  percent  (20%)  undivided  interest is conveyed by NSA to GAC, (ii) such
real property constituting Plant Assets under the Acquisition Agreement in which
a twenty  percent (20%)  undivided  interest is conveyed by NSA to GAC and (iii)
such personal property  constituting Plant Assets as may be subsequently jointly
acquired by or on behalf of the Owners.

     "Lien" shall mean with respect to any Property,  any mortgage lien, pledge,
charge,  security  interest  or  encumbrance  of any  kind  in  respect  of such
Property.  For purposes  hereof,  a Person shall be deemed to own,  subject to a
Lien,  any Property  that it has acquired or holds  subject to the interest of a
vendor or lessor under any conditional  sale  agreement,  capital lease or other
title  retention  agreement  (other than an  operating  lease)  relating to such
Property.

     "Management Fee" shall have the meaning specified in Section 5.7.9.

     "Molten Metal" shall mean Alumina reduced to aluminum in molten form at the
Plant.

     "Notes" shall mean the 11 3/4% Senior Secured First Mortgage Notes due 2008
issued by Century and any registered notes issued in exchange therefor.

     "Operating  Costs" shall mean all costs,  expenses and charges  incurred by
the Operator  and billed by the Operator to or otherwise  incurred by the Owners
for the  operation,  maintenance  and  repair of the Plant,  and shall  include,
without limitation, costs and expenses incurred by the Owners in performance of,
or otherwise payable under, the Shared Services  Agreement and the Environmental
Access and Cooperation Agreement.  All such costs, expenses and charges shall be
computed on an accrual  basis in  accordance  with GAAP,  and shall  exclude (i)
interest  and other  costs  related to  financing,  (ii)  Alumina  costs,  (iii)
depreciation and  amortization,  (iv) Extras,  (v) costs of Century employees in
performing services for the Operator, unless otherwise expressly approved by the
Owners  Committee and (vi) such costs,  expenses or charges as are excluded from
time to time by the Owners Committee.

     "Operator"  shall  mean  CAK  and  any  subsequent  operator  of the  Plant
appointed in accordance with the provisions of this Agreement.

     "Owners" shall have the meaning specified in the Recitals to this Agreement
and shall include their respective  successors and assigns who become parties to
this Agreement.

     "Owners Agreement" or "Agreement" shall mean this agreement,  including all
Exhibits and Schedules attached hereto.

     "Owners  Committee" shall mean the committee  established by the provisions
of Article III of this Agreement.


                                       4


     "Owner's  Plant  Assets"  shall mean the Property  comprising a part of the
Plant, title to which is now or hereafter held individually by an Owner.

     "Parent  Guarantee"  or  "Parent   Guarantees"  shall  mean  those  certain
agreements of guarantee and undertaking referred to in Section 2.4, the forms of
which are  attached  as  Exhibits  B-1,  B-2 and B-3 to this  Agreement,  or any
similar  agreement  delivered by a Parent Guarantor of a transferee  pursuant to
Section 9.3.2.

     "Parent  Guarantor"  shall mean a  corporation  named in  Section  2.4 or a
parent company of a transferee,  which executes and delivers a Parent  Guarantee
relating to an Owner.

     "Person" shall mean any individual, corporation, limited liability company,
voluntary  association,   partnership,   joint  venture,  trust,  unincorporated
organization  or  government  (or  any  agency,   instrumentality  or  political
subdivision thereof).

     "Plant"  shall  mean (i) the land,  pot lines and  related  facilities  and
fixtures at the NSA aluminum reduction  facility located at Hawesville,  Hancock
County,  Kentucky,  (ii) all facilities  and fixtures  necessary for the current
operation of the Plant such as the power substations,  Cast House and Cast House
equipment,  anode bake oven,  paste plant,  alumina silo,  rodding  shop,  water
treatment and pollution control  facilities,  and (iii) any additional land, and
any additional  facilities and fixtures,  acquired or constructed after the date
hereof by joint  agreement of the Owners and at their joint expense.  The Plant,
as currently existing under clauses (i) and (ii), is described in Exhibit C.

     "Plant  Assets"  shall mean all Property  comprising  the Plant,  and shall
include the Owner's Plant Assets of each Owner and the Jointly-Owned Property.

     "Primary  Aluminum" shall mean aluminum  products (e.g.,  T-ingot,  foundry
ingot and sow) resulting from the casting of Molten Metal.

     "Property"  shall  mean any  interest  of any kind in  property  or assets,
whether real personal or mixed, and whether tangible or intangible.

     "Rated  Capacity"  shall mean,  assuming  normal  operating  conditions and
taking into account maintenance and other technical  requirements,  237,000 Tons
of Molten Metal per year.

     "Reconstitution" shall have the meaning specified in Section 9.1.4.

     "Related  Company" shall have the same meaning as Affiliate except that the
reference in the  definition of Affiliate to one hundred  percent (100%) control
shall be changed to twenty percent (20%) control.

     "Representative" shall have the meaning specified in Section 3.1.1.

     "Secured Party" shall have the meaning specified in Section 9.2.1(a).


                                       5


     "Shared  Services  Agreement"  shall  mean the  Shared  Services  Agreement
entered into by the Owners with Southwire as of the date hereof, as the same may
be amended, modified or supplemented from time to time.

     "Southwire" shall mean Southwire Company, a Delaware corporation.

     "Tangible  Net  Worth"  shall  mean as at any  date  the  sum for a  Parent
Guarantor and its consolidated  subsidiaries (determined on a consolidated basis
without  duplication  in  accordance  with  GAAP  or  international   accounting
standards, as applicable,  in each case consistently applied), of the following:
(a) the gross book value of assets  (excluding  goodwill,  patents,  trademarks,
tradenames,  organization expense, treasury stock, unamortized debt discount and
expense,  deferred  charges  and  other  intangibles)  minus  (b) the sum of the
following:  (i) reserves  applicable to the assets  referred to in the foregoing
clause (a), (ii) all liabilities  (including  accrued and deferred income taxes)
and  subordinated  indebtedness  to the extent they are not  subordinated to the
Owners' obligations under this Agreement, and (iii) all minority interests.

     "Ton" shall mean a metric ton of 1,000 kilograms (2,204.6 pounds).

     Section 1.2 References in Agreement. In this Agreement,  unless the context
otherwise requires:

          1.2.1 References to an Article,  Section or Exhibit shall be construed
     as  references to that  specified  Article or Section of or Exhibit to this
     Agreement.

          1.2.2 References to a document  (including this Agreement),  or to any
     provision  of any  agreement,  shall be  construed  as  references  to that
     document or provision as amended or supplemented from time to time upon the
     written agreement of the parties thereto and with any further consent which
     may be required.

                                   Article II

                        JOINT USE; NO ENTITY; GUARANTEES

     Section 2.1 Joint Use. The Owners, each owning its Owner's Plant Assets and
holding an  undivided  interest  in the  Jointly-Owned  Property  as a tenant in
common,  hereby  agree to cause the  Operator  to use and  operate the Plant for
their joint use and benefit in accordance  with the terms and provisions of this
Agreement.  The  Operator  agrees to use and operate the Plant for the joint use
and benefit of the Owners and for its own benefit in  accordance  with the terms
set forth in this Agreement.


                                       6


     Section 2.2 Intent.

          2.2.1 No Entity or Agency.  The  Owners  intend by this  Agreement  to
     provide  for the use of their  respective  Interests  in the  Plant for the
     conversion  of Alumina into Molten Metal or Primary  Aluminum,  as provided
     for in this  Agreement.  The  parties  do not intend by this  Agreement  to
     establish a  corporation,  association,  partnership or other entity of any
     kind.  This  Agreement is not entered into for the  production of profit to
     the parties, except with respect to (i) each Owner's own use or disposition
     of  Aluminum  Product  produced  at the Plant and (ii) the  Management  Fee
     payable hereunder to the Operator.

          2.2.2 Tax  Election.  At the earliest  opportunity,  the parties shall
     take all  action  necessary  to  elect,  to the  extent  that  this  Owners
     Agreement or any related agreements give rise to an organization treated as
     a partnership for tax purposes,  that such  organization  shall be excluded
     from  the  application  of all of the  provisions  of  Subchapter  K of the
     Internal  Revenue Code of 1986, as amended,  pursuant to the  provisions of
     Section 761(a) thereof and the regulations thereunder.

     Section 2.3 Joint Ownership; Waiver of Partition.

          2.3.1 Ownership of  Jointly-Owned  Property as Tenants in Common.  The
     Jointly-Owned  Property,  both  as  currently  existing  and  as  hereafter
     acquired or constructed, shall be owned by the Owners as tenants in common,
     in undivided interests in proportion to their respective Interests, and not
     owned by the Operator or any  partnership or association of any kind of the
     Owners.  The Owners acknowledge that their respective Owner's Plant Assets,
     their respective Interests and their respective tenancy in common interests
     in the Jointly-Owned Property are separate.

          2.3.2 Waiver of Partition. Except as provided in Section 13.2, each of
     the  Owners  waives  all rights to  partition  any  portion of the Plant by
     judicial proceedings.

          2.3.3  Disposition of  Jointly-Owned  Property,  Owner's Plant Assets.
     Except as provided in Article  IX, all sales or other  dispositions  of any
     Jointly-Owned  Property shall require the unanimous  consent of the Owners,
     provided  that (a) any sale or  disposition  not  exceeding $2 million with
     respect to a single transaction,  or any separate but related  transactions
     not  exceeding  $5  million  in  the  aggregate,  during  any  twelve  (12)
     consecutive calendar months, shall be effectuated upon the majority vote of
     the Owners on the basis of their respective Interests,  and (b) any sale or
     other  disposition for which a majority vote is sufficient under clause (a)
     may be effectuated  by an Owner whose Interest  exceeds fifty percent (50%)
     without the need for a vote by the Owners, and such Owner shall give notice
     of any  such  sale  or  other  transfer  to the  other  Owners.  Except  in
     connection  with a  disposition  of all or part of its  Interest  as may be
     permitted  pursuant  to Article  IX,  neither  Owner  shall  dispose of its
     Owner's Plant Assets without the prior written consent of the other Owner.

     Section 2.4 Parent Guarantees.

          2.4.1 The parties  acknowledge that Century and Glencore have executed
     and delivered the Parent  Guarantees in the forms  attached as Exhibits B-1
     and B-2 to this Agreement, respectively.


                                       7


                                  Article III

                       ACTION BY OWNERS; OWNERS COMMITTEE

     Section 3.1 Authority to Bind Owners.

          3.1.1 Action by Owners Required. With respect to the subject matter of
     this  Agreement  and subject to Sections  3.1.2 and 10.2,  the Owners shall
     only act (i)  through  resolutions  adopted by the Owners  Committee  which
     shall be  composed  of a minimum  of one and a maximum of two  persons  per
     Owner  (collectively,  the  "Representatives"),   selected  in  the  manner
     specified  in  Section  3.3,  (ii)  through  resolutions  adopted  by other
     committees  to the extent  authorized by the Owners  Committee  pursuant to
     Section 3.7, or (iii) by written  consent of the Owners  executed in one or
     more  counterparts  on  behalf  of each  Owner  by its  President  or other
     authorized  officer  or  signatory.  Action  taken by the Owners by written
     consent as provided by clause  (iii) shall not  constitute  an amendment of
     this Agreement.

          3.1.2 Operator's  Actions.  In addition to actions taken by the Owners
     as  provided  in Section  3.1.1,  the Owners  shall be bound by all actions
     taken by the Operator  within the scope of authority  delegated to it under
     the terms of this Agreement.

          3.1.3 No Unilateral Action. No Owner shall have the right or authority
     by its  own  act  to  bind  any  other  Owner,  any  of  the  Plant  or the
     Jointly-Owned  Property (except for encumbrances on its Owner's Interest or
     its Owner's  Plant Assets as permitted  under Section 9.2 or as provided in
     Section 2.3.3),  or any of the assets or property of the other Owner or the
     Operator,  nor shall any Owner  represent  or hold  itself out to any third
     party as having such right or authority.

     Section  3.2  Owners  Committee.  The  Owners,  acting  through  the Owners
Committee,  shall be  responsible  for the  general  management  of the  Plant's
operations and facilities,  including  supervision and control of the Operator's
performance  of those  responsibilities  delegated  to the  Operator  under this
Agreement.   The  Owners  Committee  also  shall  have  the   responsibility  of
supervising and controlling the activities of any committee  appointed  pursuant
to Section 3.7.

     Section 3.3 Appointment of Representatives.

          3.3.1 Appointment  Procedure.  Each Owner shall appoint upon execution
     of this Agreement,  and may appoint from time to time thereafter subject to
     the provisions of Section 10.2, up to two  Representatives  to serve on the
     Owners  Committee.  If two  Representatives  are appointed by an Owner, one
     shall be  designated  its  "Principal  Representative"  and the  other  its
     "Alternate  Representative".  If only one  Representative is serving on the
     Owners Committee for an Owner, that  Representative  shall be the Principal
     Representative of that Owner. If all  Representative  positions allotted to
     an Owner  are  vacant,  the  Owner's  President  shall be  deemed to be the
     Principal  Representative  of that Owner,  and shall serve in such capacity
     until  that  Owner  appoints  a  Representative  to  serve  on  the  Owners
     Committee.

          3.3.2  Dismissals  and  Replacements.  Subject  to Section  10.2,  any
     Representative  appointed by an Owner may only be dismissed from the Owners
     Committee   or  replaced  as  a  Principal   Representative   or  Alternate
     Representative  by that Owner.  Any  vacancies  in  positions on the Owners
     Committee  allotted to an Owner may only be filled by that  Owner,  in each
     case by delivering written notice to the other Owner. Any such notice shall
     be  effective  immediately  upon  receipt by the other Owner unless a later
     effective   date  is  specified  in  the  notice.


                                       8


          3.3.3  General.  Each  Representative  appointed  by  an  Owner  shall
     represent the  interests  and act on behalf of that Owner.  Representatives
     shall not be deemed to be employees or agents of the Plant or the Operator,
     and except as specifically provided for herein, their salary,  expenses and
     other compensation shall be the responsibility of the appointing Owner.

     Section 3.4 Meetings of the Owners  Committee;  Written Consents in Lieu of
Meetings.

          3.4.1 Holding of Meetings.  The Owners Committee shall meet quarterly,
     with  additional  meetings if required to effectuate the intent and purpose
     of this Agreement.  Meetings of the Owners Committee may be (i) held at the
     Plant facilities or at such other place as agreed to by a Representative of
     each Owner, or (ii) conducted by conference  telephone,  which for purposes
     of this  Article III shall  include any means of audio  transmission  which
     permits each Representative  participating in such a meeting to hear and be
     heard by each other participating Representative.

          3.4.2 Quorum;  Calling of Meetings.  Subject to Section 10.2, meetings
     of the Owners Committee shall require the attendance, or participation in a
     telephone conference,  of at least one (1) Representative appointed by each
     Owner in order to constitute a quorum for the transaction of business.  Any
     Representative  may call a meeting  of the Owners  Committee  upon ten (10)
     calendar days prior notice to each of the other  Representatives.  Meetings
     of the  Owners  Committee  may be held at any time  without  notice  if the
     Principal  Representatives of each Owner participate in the meeting. Notice
     to  Representatives  shall be given  care of the  appointing  Owner at such
     Owner's  address  and  in the  manner  specified  for  notices  under  this
     Agreement. Any Representative may request the attendance of officers of the
     Operator or advisors at a meeting.

          3.4.3  Written  Consents.  In lieu of  holding a  meeting,  the Owners
     Committee may act by means of a written consent  containing the text of the
     resolutions  proposed for adoption,  and such written  consent shall become
     effective upon receipt by each Owner of a fully  executed  original (or set
     of original  counterparts)  signed by the Principal  Representative of each
     Owner.

     Section 3.5 Intentionally Omitted.

     Section 3.6 Voting Requirements.

          3.6.1 In General.  Except as provided in Section  3.6.2,  decisions of
     the  Owners  Committee  shall  require a  majority  of the  votes  cast for
     approval.

          3.6.2 Matters Requiring Unanimous Consent.  Decisions regarding any of
     the following shall require the unanimous  consent of the Owners  Committee
     or, in the  alternative,  written  consent  of the  Owners as  provided  in
     Section  3.1.1(iii)  (for  purposes of this Section  3.6.2,  references  to
     "Plant Assets" shall be deemed not to include any Owner's Plant Assets):


                                       9


               (a) Approval of the annual  operating  budgets and annual capital
          budgets  for the  operation  and  maintenance  of the  Plant,  and any
          increases  in such  budgets in excess of five  percent  (5%) (it being
          understood  that  increases  in such  budgets of five  percent (5%) or
          less,  which  shall  not  require  unanimous  consent  of  the  Owners
          Committee,  shall  not  include  any costs of the type  identified  in
          paragraph (j) of this Section 3.6.2);

               (b) Approval of any capital  expenditures for the Plant in excess
          of  $2.5  million  and  approval  of  separate  but  related   capital
          expenditures in excess of $3.5 million in the aggregate;

               (c) Sales of any Plant  Assets where such sales exceed $2 million
          with respect to a single  transaction  or $5 million in the  aggregate
          with  respect to separate but related  transactions  during any twelve
          (12) consecutive calendar months, except as permitted by Article IX;

               (d) Placing of Liens on any Plant Assets,  except as permitted by
          Article IX;

               (e) Entering  into any lease or lease  purchase for  equipment or
          other Property for the Plant  exceeding $2.5 million in total payments
          in a single  transaction or  transactions  aggregating in excess of $5
          million  in total  payments  with  respect  to  separate  but  related
          transactions in any twelve (12) consecutive calendar months;

               (f)  Selecting  the  Auditors  as  provided  in Section  5.5,  or
          dismissing   the  Auditors  prior  to  completion  of  their  term  of
          engagement;

               (g) Except as  otherwise  may be expressly  permitted  hereunder,
          entering   into,   amending,   modifying,   supplementing,   renewing,
          extending,  terminating  or rescinding any agreement that is necessary
          for the  operation of the Plant and that has a fixed term of more than
          one year;

               (h) Any action for the abandonment or total or partial suspension
          of  operations of the Plant or the  resumption  of operations  after a
          suspension of operations;

               (i) Approving any contract  between the Operator and any Owner or
          any  Related  Company  of the  Operator  or an Owner or any  amendment
          thereto or waiver thereunder;

               (j) Approving the  engagement of any employees of either Owner or
          any of their  Affiliates  (other  than the  Operator)  at the Plant or
          otherwise  in  connection  with  the  operation  of  the  Plant,   and
          allocating  the costs  thereof as  Operating  Costs as provided for in
          this  Agreement  (such costs to be reflected in the operating  budgets
          for the Plant);

               (k)  Adopting or changing any rules of the Owners  Committee,  or
          any rules regarding Cast House allocation pursuant to Section 7.5.1;


                                       10


               (l)  Subject  to the terms of  Section  9.2,  9.4 and 10.5 to the
          extent  that they relate to  enforcement  or  bankruptcy  proceedings,
          commencing or settling any  litigation,  proceeding or claim involving
          any Plant  Assets or the  operation  of the Plant where (i) all Owners
          are parties,  (ii) the relief sought  affects title to assets having a
          value in excess of  $1,000,000 or (iii)  expenditures  or losses would
          exceed $1,000,000;

               (m) Changing the accounting principles and procedures referred to
          in Section  5.4,  the cost  accounting  system  referred to in Section
          5.7.2, or the insurance requirements referred to in Section 8.1.1;

               (n)  Amending,  modifying,  supplementing,  renewing,  extending,
          terminating  or rescinding  any contract or agreement  which  required
          Owners Committee approval for execution;

               (o)  Establishing  other  committees of the Owners and delegating
          responsibilities  to them, provided that any such committee shall have
          at least one member designated by the Principal Representative of each
          Owner as the "Representative" of that Owner for purposes of voting;

               (p)  Subject  to  Section  10.8,  terminating,   or  amending  or
          modifying the terms of, the  appointment  of or replacing the Operator
          at any  time  during  which  Century  or its  Affiliates  hold a fifty
          percent (50%) or greater Interest in the Plant;

               (q) Selecting the general manager for the Plant, who shall direct
          all personnel at the Plant in accordance with the policy  decisions of
          the Owners Committee; and

               (r) Such other matters as the Owners may agree to in writing from
          time to time.

     Section 3.7 Other  Committees.  The Owners  Committee may from time to time
establish such other committees,  in accordance with Section 3.6.2(o), with such
responsibilities and authority as may be specified by resolution.

     Section  3.8  Minutes.  Minutes  shall be taken  at each  Owners  Committee
meeting  or  other  committee  meeting  by  the  person  designated  as  meeting
secretary, and copies of such minutes shall be sent to each member of the Owners
Committee or such other  committee and shall be deemed  approved if no objection
is raised within fourteen (14) days after receipt by all members of the relevant
committee.

     Section 3.9 No Liability of Committee  Members.  None of the members of the
Owners Committee or any other committee shall be personally liable to the Owners
or the Operator  for any loss,  cost or damage  arising out of or in  connection
with the  management,  operation  or  conduct of such  committees  and/or of the
business and affairs of the Plant.


                                       11


                                   Article IV

                            OPERATIONS AND MANAGEMENT

     Section 4.1 Intent.  The Owners intend by this Agreement to provide for the
use of their  respective  Interests  to  convert  Alumina  owned  separately  or
otherwise  separately  supplied by the Owners into Aluminum  Product.  Except as
otherwise specifically provided in this Agreement, no agency is created or is to
be implied with respect to any Owner or the Operator.

     Section 4.2 Operations.  Unless otherwise unanimously agreed by the Owners,
the Owners' obligations  regarding the operation of the Plant shall be performed
by the Operator  pursuant to the terms of this  Agreement.  The  Operator  shall
operate  and manage the Plant on behalf of and for the  benefit of the Owners in
accordance  with the terms hereof and in an efficient and cost effective  manner
pursuant to budgets and programs  approved by the Owners Committee in accordance
herewith.

     Section 4.3  Compliance  with Law. The Owners  desire that the operation of
the  Plant  will be  carried  out in  compliance  with all laws and  regulations
applicable  thereto,  and the Operator  will use its best efforts to ensure that
the operation of the Plant so complies.

     Section 4.4 Operator's Ownership of Intellectual  Properties.  The Operator
in the  performance  of its  duties  hereunder  may  develop,  invent or improve
technologies,  practices,  procedures,  methods,  materials  or equipment at the
Plant or may obtain the right to use intellectual  properties developed by third
parties (collectively, "Intellectual Properties"). The Operator shall retain all
right  and  title  in and to all  Intellectual  Properties  notwithstanding  any
payment of fees or other  expenses to the  Operator  by the  Owners.  Each Owner
shall  have  the  non-exclusive  right  to use and  enjoy  the  benefits  of the
Intellectual Properties at the Plant and shall have the right to sell world-wide
any Aluminum  Product produced at the Plant by employing any of the Intellectual
Properties.  An Owner  shall  have no  other  rights  in or to the  Intellectual
Properties  and shall  have no license  to use,  sell or enjoy the  Intellectual
Properties except as expressly set forth in this Section 4.4. This limitation on
each of the  Owner's  rights  shall not apply to any (i)  information  which was
known to an Owner prior to the date of this  Agreement and such prior  knowledge
can be reasonably  demonstrated by reference to existing written  records;  (ii)
information  which appears in issued patents,  published patent  applications or
other  publications  of  general  public  circulation,  including  those  of the
aluminum  industry,  other  than  by  acts  or  omissions  of  an  Owner;  (iii)
information  which an Owner  lawfully  obtained  from any third  party  which is
legally in  possession  of such  information  and has a right to reveal  same to
Owners; or (iv) information which is independently developed by an Owner without
breaching this Agreement.

                                   Article V

                      FINANCIAL MANAGEMENT; MANAGEMENT FEE

     Section  5.1  Budgets.  On or before  November 1 of each year the  Operator
shall submit to the Owners  Committee a proposed  operating  budget for the next
calendar year and a proposed  capital  expenditure  budget for the next calendar
year. Such proposed budgets shall include the amounts estimated to be payable by
each  Owner  for the  calendar  year  and  each  quarter  thereof,  taking  into
consideration  all cash  balances  anticipated  to be held or  generated  by the
Operator.  As early as possible  before the beginning of each calendar year, the
Owners  Committee,  by unanimous vote,  shall approve in principle the operating
budget and the capital budget for that calendar  year.  The Owners  Committee by
unanimous vote may amend any budget from time to time.


                                       12


     Section 5.2 Implementation of Approved Budgets.  The Operator shall use its
best efforts to  implement  each  approved  operating  budget and each  approved
capital  expenditure  budget and to carry out all its  activities and operations
hereunder in accordance therewith.

     Section 5.3 Emergency or Unexpected Expenditures. In case of emergency, the
Owners agree that the Operator may take any reasonable action it deems necessary
to  protect  life,  limb  or  property  or to  comply  with  law  or  government
regulation.  The Operator may also make reasonable  expenditures  for unexpected
events which are beyond its  reasonable  control.  The Operator  shall  promptly
notify  each  member of the Owners  Committee  of the  emergency  or  unexpected
expenditure, and all resulting costs shall thereupon be charged to the Owners in
proportion to their respective Interests at the time the emergency or unexpected
expenditures are incurred.

     Section 5.4 Accounting  Principles  and  Procedures.  The Owners  Committee
shall  review  accounting  principles  and  procedures  that are utilized by the
Operator in  operating  the Plant,  which  shall  include the types of books and
records to be maintained,  the procedures  for  collections of amounts  required
from the Owners and  disbursements  relating to  operations of the Plant and the
nature of data and reports provided to the Owners or the Owners Committee.

     Section 5.5 Books, Records, Reports and Auditors.

          5.5.1 Books and Records.  The Operator  shall  maintain such books and
     records  relating  to Plant  Assets and the  operation  of the Plant as are
     required by applicable law or the Owners Committee.  Such books and records
     shall  contain such data as are  reasonably  required by each of the Owners
     necessary to record and reflect the financial position  (including an asset
     register) and  obligations  of the Owners in  accordance  with the terms of
     this Agreement.

          5.5.2  Reports.  The  Operator  shall  furnish to every  member of the
     Owners  Committee  periodic cash forecasts and reasonable  advance  notice,
     pursuant  to the  procedures  established  from time to time by the  Owners
     Committee,  of any major  payments  that may be  required to be made by the
     Owners,  and furnish to every member of the Owners  Committee within thirty
     (30) days after the end of each calendar month a statement of operations of
     the Plant for such calendar month in such form as is approved by the Owners
     Committee,  including any  adjustments  of the type required  under Section
     5.7.6.

          5.5.3  Auditors.  The  Owners  Committee  shall  designate  a firm  of
     independent   auditors  to  opine  upon  the  statements  relating  to  the
     operations  of the  Plant as of the end of each  calendar  year and for the
     calendar year then ended (the "Auditors"). The firm initially designated by
     the  parties is  Deloitte & Touche LLP.  The  audited  statements  shall be
     received by each of the members of the Owners  Committee within ninety (90)
     days after the end of such calendar year.


                                       13


     Section 5.6 Bank Accounts.

          5.6.1  Establishment  of Accounts.  The Operator shall maintain one or
     more bank  accounts in its name as approved from time to time by the Owners
     Committee.

          5.6.2 Deposits and  Disbursements of Funds. The Operator shall deposit
     into such  account(s)  all payments  which it receives from any Owner under
     this  Agreement,  all  amounts  which  it  receives  as  damages  or  under
     warranties relating to any Plant Assets, and all proceeds which it receives
     as a result of the sale,  lease,  license or other disposition of any Plant
     Assets,  and the  Operator  shall pay from  such  account(s)  all  expenses
     permitted to be paid by it under this  Agreement and all  distributions  to
     the Owners of amounts  received  with  respect to any Plant  Assets  (which
     shall not include an Owner's  Plant  Assets);  provided  that the  Operator
     shall be permitted  to offset  amounts due from and payable to a particular
     Owner.

          5.6.3  Signatory  Powers.  Subject  to the  limitations  specified  in
     Section 3.6.2 and any other conditions  determined from time to time by the
     Owners Committee,  all checks,  notes,  bills of exchange,  drafts or other
     documents  for the payment of money for Plant  purposes  shall be signed in
     the name of the Operator by the Plant's General Manager or controller or by
     such other employees of the Operator as shall be approved by unanimous vote
     of the Owners Committee.

     Section 5.7 Charges.

          5.7.1 Operating Costs.

               (a)  Each  Owner  shall  be  charged  and  obligated  to pay  the
          Operator,  in the manner  provided  in Sections  5.7.3 and 5.7.4,  the
          Operating  Costs for each Ton of Molten  Metal  produced  at the Plant
          pursuant to this  Agreement as part of such Owner's  Basic Tonnage and
          Allocated Excess Tonnage.

               (b) The Operating  Costs per Ton of Molten Metal produced  during
          any period shall be the Operating Costs for such period divided by the
          number of Tons of Molten Metal  produced for all of the Owners in such
          period.

               (c) The  Operator  shall  use its best  efforts  to  ensure  that
          Operating  Costs  are kept at a  minimum  consistent  with the  legal,
          proper and efficient operation of the Plant.

               (d) The  Operating  Costs  billable by the Operator to the Owners
          shall include all costs, expenses and charges incurred by the Operator
          for the operation, maintenance and repair of the Plant, computed on an
          accrual basis in accordance  with GAAP and subject to  confirmation by
          the Auditors as provided in Section 5.5.3 of this Agreement, and shall
          include  without  limitation  the cost to  Operator  of the funding of
          actuarial cost obligations accruing under any pension plans determined
          under the funding methods used to determine costs under the plans, and
          the payment of other  obligations  accruing under any employee benefit
          plans,  group life  insurance  plans,  major  medical  plans,  medical
          (including  drug)  reimbursement  plans,  salary  continuation  plans,
          supplemental  unemployment benefit plans and welfare plans,  severance


                                       14


          or termination of pay plans,  and retiree benefit,  savings,  bonus or
          profit-sharing  plans  (collectively  with all such pension plans, the
          "Employee  Benefit  Plans"),  but  only  to the  extent  the  expenses
          incurred by the Operator with respect to any Employee  Benefit Plan do
          not  exceed  the  funding  or  payment  requirements,   for  employees
          generally  or  for  particular  classes  of  employees,   approved  by
          unanimous  vote of the  Owners  Committee  or (in the  absence of such
          action by the Owners  Committee) such funding or payment  requirements
          as are  based on the  terms  of such  Employee  Benefit  Plans as they
          existed as of the date hereof,  it being  understood that no unanimous
          approval of the Owners  Committee  for  expenses  incurred by Operator
          with respect to actuarial  cost  obligations  under the pension  plans
          shall be required if such  expenses  are within the range  proposed in
          the annual  actuarial  study for the relevant  year based on actuarial
          funding  methods and assumptions  consistent  with those  contemplated
          under the then applicable funding or payment requirement terms of that
          pension plan, as provided above.

     5.7.2 Extras.

               (a) Each Owner agrees to pay the Operator, in the manner provided
          in Section  5.7.3,  for each Extra  requested by it as  determined  in
          accordance with the cost accounting  system for the Plant  established
          by the Owners Committee. The cost accounting system shall be installed
          and used  throughout  the term of this  Agreement  by the  Operator to
          determine  the  proper  allocation  among  the  Owners of the costs of
          operating the Cast House.

               (b) If the Owners Committee does not approve a proposed change in
          the cost accounting system requested by an Owner, the Owner requesting
          a change  shall have the right to request  the  Auditors to review the
          cost accounting  system then being employed to ascertain  whether such
          system  should be changed in the manner  sought by such Owner in order
          more  accurately to allocate  costs among the Owners.  The expenses of
          such Auditors'  review shall be borne by the Owner which requested the
          review,  if the Auditors  determine  no change is required,  or by the
          Owner  which voted  against  the  requested  change,  if the  Auditors
          recommend  such change.  Any change in such system  recommended by the
          Auditors  shall be effective  for the calendar  months  following  the
          calendar  month in which  the  request  was  made  for  review  by the
          Auditors.

          5.7.3 Calculation of Charges. The Operator shall calculate charges for
     Operating Costs,  Extras and other amounts as may be due from the Owners or
     a particular  Owner,  prepare  statements  to the Owners  relating to their
     respective  shares of Operating  Costs and such other amounts,  and receive
     and  deposit  into the  Operator's  bank  account(s)  all sums  paid to the
     Operator for the account of the Owners,  all in the manner  provided in the
     procedures established by the Owners Committee.

          5.7.4 Payment of Charges.

               (a) Charges for Operating Costs,  Extras and other amounts as may
          be due under this Agreement  shall be collected from the Owners by the
          Operator  at the times and in the manner  provided  in the  procedures
          established by the Owners Committee.


                                       15


               (b) In  general,  it is  intended  that the  Operator  shall have
          neither  more than nor less than such funds as are required to operate
          the Plant  efficiently.  Each Owner shall make funds available so they
          may be drawn on a daily basis through the Operator's bank account. The
          procedures to be established by the Owners Committee shall require the
          Operator to give the Owners  Committee  periodic  cash  forecasts  and
          reasonable  advance  notice of any major payments that may be required
          to be made.

               (c)  Notwithstanding  any  dispute  with  respect  to the  amount
          requested  to be paid by an Owner,  each  Owner  shall pay the  amount
          requested within ten (10) days after the receipt of such request,  all
          payments being subject to adjustment as provided in Sections 5.7.5 and
          5.7.6.

          5.7.5 Year End Adjustments.

               (a) Within  ninety (90) days after the end of each  calendar year
          the Operator  shall  submit to the Owners:  (i)  financial  statements
          showing  the  items  of the  Operating  Costs  for such  year,  (ii) a
          statement  showing the Extras  performed during such year, and (iii) a
          statement  showing any other amounts payable by each Owner or received
          from each Owner under this Agreement,  all of which  statements  shall
          reflect  adjustments  for  partial  calendar  months  included in such
          calendar year and shall be audited by the Auditors.

               (b) Within ten (10) days  after the  receipt of such  statements,
          all such adjustments, including any repayment from the Operator, shall
          be made as may be  necessary to make the  respective  payments of each
          Owner for such year conform to its respective  obligations  under this
          Agreement for such calendar year, as shown by such  statements.

          5.7.6 Resolution of Disputed Charges.

               (a) If any  Owner  disputes  the  calculation  or  allocation  of
          charges for Operating Costs, Extras or any other amounts hereunder, it
          shall give notice of such dispute to the Operator and the other Owners
          setting forth the details of its dispute.  If the disputing  Owner and
          the Operator cannot  satisfactorily  resolve the dispute within thirty
          (30) days, the disputing  Owner may request the dispute to be referred
          to the  Auditors,  whose  decision  shall be binding  on the  parties.
          Payments  arising out of  resolution  of such  disputes  shall be made
          within ten (10) days of the resolution.

               (b) If the Auditors  recommend an  adjustment  which  exceeds the
          lesser of $100,000 or five percent (5%) of the amount in dispute,  the
          Auditors' fees shall be paid by the Operator. Otherwise, the disputing
          Owner shall pay the Auditors' fees.

          5.7.7  Financing and Other Costs.  Each of the Owners shall pay and be
     responsible for its own (i) charges for interest and other costs related to
     financing  its payments  required to be made  hereunder,  and (ii) costs of
     transportation of Alumina.


                                       16


          5.7.8  Power  Contract.  In the event that the  Owners  agree that the
     current  power  contracts  entered  into by the  Operator for the supply of
     electrical  power to the Plant may be assigned to an Owner,  pro rata,  the
     Owners  shall  enter  into an  agreement  containing  terms and  conditions
     acceptable to the Owners which provides,  inter alia, that the Owners shall
     have the  obligation to supply their pro rata share of electrical  power to
     the Plant for the operation thereof at its then rated capacity and that the
     Owner to which its pro rata portion of the power contract is assigned shall
     reimburse the other Owner for any increase in Operating Costs  attributable
     to any  replacement  source of  electrical  power and for any  reduction in
     capacity  of such other  Owner as a result of any  failure to provide  such
     electrical power.

          5.7.9  Management  Fee. For each calendar  quarter  during the term of
     this Agreement, GAC shall pay to the Operator,  quarterly in arrears, a fee
     (the  "Management  Fee")  as  full  compensation  for all  services  of the
     Operator  provided under this Agreement.  The Management Fee payable by GAC
     shall be based  solely upon the value of Aluminum  Product  produced at the
     Plant.  The Management Fee for a calendar  quarter shall be an amount equal
     to the product obtained by multiplying (x) the amount in pounds of Aluminum
     Product  produced for the account of GAC as an Owner during the  applicable
     calendar  quarter and (y) 3/4 of 1% of the arithmetic  average of the daily
     settlement price per pound of aluminum on the London Metal Exchange ("LME")
     as  published in "Metal  Bulletin" as the seller's  price under the caption
     "Daily  Metal"  for  each  calendar  month  during  the  calendar   quarter
     immediately preceding the calendar quarter for which payment is to be made.
     The LME  settlement  price is a basis agreed to by the parties upon which a
     value of Primary  Aluminum in major free world markets can be  established.
     If a significant  change occurs in its historic  relationship to free world
     values, and such change is for a duration of nine (9) months or longer, the
     parties,  upon the  request of either of them,  agree to meet to discuss in
     good faith an alternative  basis for  establishing  such value.  If the LME
     shall cease to trade aluminum or the aluminum  settlement  price of the LME
     is no longer  published,  the  "value of Primary  Aluminum"  shall mean the
     generally accepted substitute for the aluminum settlement price of the LME.
     If there is no such generally accepted substitute the parties in good faith
     shall select a substitute.  Failing such  agreement,  the "value of Primary
     Aluminum"  shall be submitted to  arbitration as provided in Section 13.11.
     The Operator shall invoice GAC for the amount of the Management Fee due for
     each calendar  quarter  promptly after the end of such calendar quarter and
     GAC shall pay such amount  within ten (10)  calendar  days after receipt of
     such invoice.

                                   Article VI

                           OBLIGATIONS OF THE OPERATOR

     Section 6.1 Plant Operation Services. In addition to the obligations of the
Operator specified in Article V and elsewhere in this Agreement,  and subject to
the  supervision  by the Owners  through the Owners  Committee and to the limits
imposed on the Operator herein,  the Operator shall perform,  in its own name as
agent for an  undisclosed  principal,  but in all  cases on  behalf  and for the
benefit of the Owners,  all tasks  required for the operation,  maintenance  and
repair of the Plant in the manner  contemplated by this  Agreement;  and without
limiting the generality of the foregoing the Operator shall:


                                       17


          6.1.1  purchase and store all  materials,  supplies and other personal
     property  necessary for the operation,  maintenance and repair of the Plant
     (other than Alumina, which the Owners shall be required to deliver pursuant
     to Article VII hereof);

          6.1.2 purchase or otherwise  arrange for the provision of all services
     and utilities  necessary for the operation,  maintenance  and repair of the
     Plant,  and for that  purpose  the  Operator  shall  continue to perform on
     behalf and for the benefit of the Owners all contracts or other  agreements
     relating to such services and utilities which are currently in force and to
     which an Owner is a party or in which an Owner has an interest;

          6.1.3 receive delivery of all Alumina delivered by or on behalf of the
     Owners,  unload  such  Alumina  and store such  Alumina and provide for the
     conversion  of such Alumina into  Aluminum  Product,  deliver to the Owners
     their  allocable  portions of the Aluminum  Product in accordance  with the
     Owners  Agreement upon completion of production,  and keep complete records
     with respect to the Alumina furnished and converted for each Owner;

          6.1.4 take all commercially  reasonable actions in order to permit the
     Owners to perform their  obligations  under the Aluminum  Supply  Agreement
     including  without  limitation the obligations for the delivery of Aluminum
     Product to Southwire;

          6.1.5 if and to the  extent  so  requested  by an  Owner,  place  such
     Owner's non-molten  Aluminum Product in storage at the Plant for a handling
     charge  determined  by the Operator and billed to that Owner as provided in
     this Agreement,  take such commercially  reasonable measures as appropriate
     to segregate all Aluminum  Product  stored for that Owner,  issue a holding
     certificate  in  customary  form  and  execute  financing   statements  and
     documents of similar nature  provided by such party,  and mark all Aluminum
     Product owned by an Owner with a distinctive  mark acceptable to such Owner
     which shall be sufficient to identify that Aluminum Product as the property
     of such Owner;

          6.1.6 repair and maintain the Plant in good operating condition and in
     accordance with generally accepted repair and maintenance standards;

          6.1.7 secure all operating permits,  licenses and approvals  necessary
     to the continued  operations of the Plant,  conduct operations of the Plant
     in  accordance  with  applicable  laws  and  regulations,   maintain  Plant
     security,  and not permit  actions to occur which  would  cause  default or
     violations of any such operating permits, licenses and approvals; provided,
     however,  that Operator shall have no liability or obligation  with respect
     to permits  and  approvals  that were to have been  obtained  by  Southwire
     before the date  hereof,  except to use  Operator's  reasonable  efforts to
     obtain same;

          6.1.8 recruit and employ all personnel necessary to operate and manage
     the  Plant,  instruct  and  train  such  employees  in  the  processes  and
     procedures used in the Plant,  and advise the Owners  Committee  concerning
     employee  training  programs  for the  Plant  and,  in  furtherance  of its
     obligations under this Section 6.1.8, perform all of the obligations of CAK
     under the Collective Bargaining Agreement;

          6.1.9 perform,  on behalf of the Owners, all of the obligations of the
     Owners under the Shared Services  Agreement,  the Environmental  Access and
     Cooperation  Agreement and the Pump and Treat Building Lease  Agreement and
     any other  contracts  which may be entered  into by the Owners with a third
     Person relating to the operation of the Plant; and


                                       18


          6.1.10  perform  all  obligations   required  of  the  Operator  under
     contracts entered into by the Operator under this Section 6.1, and exercise
     its best  efforts to cause the other  parties to  perform  all  obligations
     required to be performed by such other parties under such contracts.

          6.1.11  Nothing in this  Agreement  shall be deemed to  authorize  the
     Operator  to perform  any act on behalf of the Owners  which  requires  the
     unanimous consent of the Owners Committee under Section 3.6.2 hereof unless
     such  consent has been given in the manner  required  under  Section  3.6.2
     hereof.

     Section 6.2 Management Services.  In addition to its other undertakings set
forth in this  Agreement,  the  Operator  agrees to  provide  to the  Owners all
management,  advisory and  consultation  services  reasonably  necessary for the
efficient operation and management of the Plant, and in particular will:

          6.2.1 from time to time make available to the Owners for consultation,
     engineers and experts familiar with the processing and engineering problems
     relating to the efficient  operation and maintenance of aluminum  reduction
     plants, including pot room operations,  power utilization,  computer usage,
     testing,  carbon plant  operations,  cast house  operations,  environmental
     controls and maintenance procedures;

          6.2.2  advise the Owners in relation to the  acquisition  of equipment
     and supplies for the Plant;

          6.2.3   advise   the   Owners   concerning   financial   and   general
     administrative and control, and employee relations and remunerations;

          6.2.4  advise the Owners on the uses of  processes  and other  changes
     resulting  from  the  Operator's  continuing  experience  and  study in the
     operation of aluminum  reduction plants,  which processes and changes shall
     be made available to the Owners on a non-exclusive  royalty free basis, but
     without right to sublicense; and

          6.2.5  provide  guidance  and advice as requested by the Owners or the
     Owners Committee.

     Section 6.3 Authorization to Act.

          6.3.1  The  Owners  hereby  authorize  CAK,  in  its  capacity  as the
     "Operator" under this Agreement,  to do the following acts without need for
     further Owners Committee approval,  until such time as the Owners Committee
     shall determine otherwise by unanimous vote:

               (a) sell any Plant Assets  (other than an Owner's  Plant  Assets)
          where such sales do not  exceed $2  million  with  respect to a single
          transaction  or $5 million in the  aggregate  with respect to separate
          but related  transactions during any twelve (12) consecutive  calendar
          months;

               (b)  enter  into any  lease or lease  purchase  for the Plant not
          exceeding  $2.5 million in total  payments in a single  transaction or
          transactions  aggregating  in excess of $5 million  in total  payments
          with  respect to separate but related  transactions  during any twelve
          (12) consecutive calendar months;

               (c)  enter  into,  amend  or  terminate  any  agreement  that  is
          necessary  for the operation of the Plant and that has a fixed term of
          one year or less;


                                       19


               (d)  commence  or  settle  any  litigation,  proceeding  or claim
          involving  any Plant Assets (other than an Owner's Plant Assets) where
          none of the following conditions is satisfied:  (i) both Owners or any
          of their affiliates are parties,  (ii) the relief sought affects title
          to  assets  having  a  value  in  excess  of   $1,000,000   and  (iii)
          expenditures or losses would exceed $1,000,000.

          6.3.2 If the Plant is damaged or  destroyed  in whole or in part,  the
     Owners and the members of the Owners Committee, on behalf of themselves and
     any  subsequent  transferee of all or part of their  respective  Interests,
     hereby  authorize CAK,  independently  of its capacity as "Operator"  under
     this  Agreement  and for so long as the Interest of NSA or any Affiliate of
     NSA is greater than fifty percent (50%),  to repair the damaged  portion or
     rebuild or replace  the  destroyed  portion on behalf of the Owners in such
     manner as CAK shall  reasonably deem  appropriate so as to restore the same
     as nearly as possible to the  capacity  thereof  immediately  prior to such
     damage or destruction,  provided the cost of repairing such damage does not
     exceed $2.5 million.  In connection  with any such repair  activities,  CAK
     shall consult with the Owners  Committee and keep it informed of its repair
     activities, and shall bill the Owners directly for such repair costs.

     Section 6.4 Liability of the Operator.  The Operator shall be liable to the
Owners  for,  and shall  indemnify  and hold  each of them and their  respective
officers,  employees and agents  harmless from,  any claims,  losses or expenses
arising as a result of acts or omissions of the Operator's  management personnel
(first line supervisor or higher)  constituting,  on a repetitive  basis,  gross
negligence or willful misconduct.  The preceding sentence shall not be deemed to
limit the Operator's obligation to repay any amounts billed to and paid to it as
Operating  Costs  which are  ultimately  determined  by the  Auditors  not to be
Operating Costs.

                                  Article VII

                                   CONVERSION

     Section 7.1 Conversion Rights and Obligations.

          7.1.1 Obligation to Convert.  The rights and obligations of the Owners
     to convert Alumina to Molten Metal or Primary Aluminum at the Plant are set
     forth in this Article VII.

               (a) Except as otherwise provided in this Agreement

                    (i) the  Operator  shall  endeavor  to operate  the Plant at
               Rated Capacity or higher;

                    (ii) each Owner  agrees to supply or cause to be supplied to
               the Plant the quantity of Alumina necessary for the production of
               such Owner's Basic Tonnage and Allocated Excess Tonnage,  if any;
               and

                    (iii) each Owner will be entitled to Molten  Metal  produced
               at the Plant in proportion to its Basic Tonnage and its Allocated
               Excess  Tonnage,   if  any,  provided  it  supplies  Alumina  for
               conversion in accordance with the provisions of this Article VII.


                                       20


          7.1.2 Reduction of Basic Tonnage.

               (a) If, from time to time,  an Owner  desires to reduce its Basic
          Tonnage,  it shall notify the other  Owner,  at least ninety (90) days
          prior to the date that it desires the  reduction to become  effective,
          of the  amount  of the  reduction,  the  date the  reduction  is to be
          effective  and the period of time (which shall not be less than ninety
          (90) days) that such reduction is to be in effect.

               (b) If an Owner  gives  notice to reduce its Basic  Tonnage,  the
          other Owner (the "eligible  Owner") shall have the right to assume all
          or part of the available tonnage or conversion capacity,  for all or a
          portion of the time that such tonnage or conversion  capacity shall be
          made  available,  such right to be exercised  by giving  notice to the
          Owner seeking to reduce its Basic  Tonnage,  within sixty (60) days of
          receipt  of the  notice of  reduction,  specifying  the  amount of the
          available  tonnage  to be  assumed  and the  period  of time that such
          assumption is to be in effect.

               (c) The giving of the notice of assumption specified in paragraph
          (b) shall thereby  commit the eligible Owner to convert the tonnage in
          the amount and for the time therein  designated  upon the terms herein
          provided. Any portion of the reduction in tonnage or tolled tonnage of
          an Owner which is  committed  for by the other Owner  pursuant to this
          Section  7.1.2 for any  period of time  shall not be part of the Basic
          Tonnage of the Owner  making the  reduction  for such period and shall
          for such  period  be part of the  Basic  Tonnage  of the  Owner  which
          committed for the tonnage made available by such reduction or offer to
          Toll.

          7.1.3  Failure to  Convert  Basic  Tonnage.  If (i) an Owner has given
     notice to the other  Owner  pursuant  to Section  7.1.2 to reduce its Basic
     Tonnage  and the other  Owner does not commit to convert all of the tonnage
     made  available by such  reduction  pursuant to Section  7.1.2,  or (ii) an
     Owner fails (for any reason, including a reason constituting force majeure)
     to supply  Alumina  sufficient  for the production of its Basic Tonnage and
     the other  Owner  does not  utilize  the  tonnage  made  available  by such
     failure,  then the Owner making the reduction or failing to supply,  as the
     case may be,  shall pay to the other Owner,  within  thirty (30) days after
     the end of each calendar month, the amount of any increase in the Operating
     Costs per Ton incurred by such other Owner during such calendar month which
     is attributable  to such reduction or failure to supply.  The amount of any
     such increase  shall be determined by the Operator by reference to the cost
     accounting  system utilized for the Plant, and shall be subject to possible
     adjustment as provided in Section 5.7.5.


                                       21


          7.1.4 Available and Allocated Excess Tonnage.

               (a)  The  Operator  shall  promptly  notify  the  Owners  of  the
          availability of any capacity to produce Primary  Aluminum in excess of
          Rated  Capacity  (the  amount of such excess  expressed  in Tons being
          herein referred to as "Available  Excess  Tonnage").  The notice shall
          specify the amount of  Available  Excess  Tonnage and the  approximate
          date  such  tonnage  can be  delivered.  Each  Owner may  request  the
          Operator  at any time to  determine  the  amount of  Available  Excess
          Tonnage.  Each of the Owners  shall give the  Operator  notice  within
          thirty (30) days after receipt of the  Operator's  notice  stating the
          portion of its share of such Available  Excess Tonnage,  such share to
          be based upon each Owner's Basic  Tonnage,  that it desires to utilize
          and the period  during which it desires to commit for such use. If any
          Owner  fails to give such  notice or commits  for less than all of its
          proportionate  share of such Available  Excess Tonnage the other Owner
          shall  have the  option to  convert  all or any part of the  remaining
          portion of the Available Excess Tonnage.  An Owner that has elected to
          take less than all of its  Available  Excess  Tonnage  shall  have the
          right,  upon six months  notice to the other Owner,  to convert all or
          any  part of its  proportionate  share  of  Available  Excess  Tonnage
          allocated to the other Owner.

               (b) Available  Excess  Tonnage which is allocated to an Owner for
          any period of time is herein called the "Allocated  Excess Tonnage" of
          such Owner for such period.

               (c) The Owners shall bear any increase in Operating Costs per Ton
          of Molten Metal incurred because the Plant is being operated in excess
          of Rated Capacity in proportion to their  respective  Allocated Excess
          Tonnages.  The amount of any such increase  shall be determined by the
          Auditors,  and the costs of such  determination  shall be borne by the
          Owners in proportion to their respective Allocated Excess Tonnages.

          7.1.5  Production  Deficiencies.  If at any time for any  reason  (not
     attributable  to the  default of an Owner) the  production  of the Plant is
     insufficient  to meet scheduled  deliveries of Molten Metal,  deliveries of
     Molten  Metal shall be reduced as follows:  (i) the  delivery of  Allocated
     Excess  Tonnages,  if any,  shall be reduced in  proportion  to the Owners'
     respective  Allocated  Excess  Tonnages  and,  if  there  is any  remaining
     deficiency,  (ii)  deliveries  of Basic  Tonnages  to the  Owners  shall be
     reduced in  proportion  to their  respective  Basic  Tonnages.

     Section 7.2 Alumina Supply.

          7.2.1  Alumina  Delivery  Obligations.  Alumina  shall at all times be
     delivered  to the  Plant  by each  Owner  or for that  Owner's  account  in
     sufficient  quantities so that, with due  consideration  for the quality of
     Alumina and the capacity of the alumina  storage  facilities  at the Plant,
     there  shall be  sufficient  Alumina  on hand at all times for the Plant to
     produce the particular Owner's Basic Tonnage and Allocated Excess Tonnage.

          7.2.2 Unloading of Alumina.

               (a) Alumina to be provided  by each Owner shall be  delivered  at
          the Plant in a vessel with acceptable storage conditions and unloading
          characteristics  reasonably  adapted  to  the  characteristics  of the
          facilities for the delivery of Alumina at the Plant. Alumina furnished
          by an Owner may be  commingled  and  shipped  in common  with  Alumina
          belonging to the other Owner,  and  commingled at the Plant,  provided
          that Alumina from different sources shall not be commingled.


                                       22


               (b) Each Owner shall pay all freight and shall be responsible for
          all other charges to effect delivery of its Alumina to the Plant.  All
          unloading costs shall be Operating Costs.

               (c) If extra demurrage, freight or other costs are incurred by an
          Owner by reason of any other Owner's  failure to comply with an agreed
          upon  delivery  schedule or  otherwise  through the fault of any other
          Owner,  the Owner at fault  shall pay the  non-defaulting  Owner  upon
          demand an amount determined by such non-defaulting Owner as sufficient
          to compensate the non-defaulting Owner for excess costs so incurred by
          them. The defaulting  Owner shall have the right to review the records
          upon which such calculation was based.

               (d) The Operator shall keep complete  records with respect to the
          Alumina furnished and converted for each Owner.

          7.2.3  Quality of Alumina.  If for any reason an Owner does not supply
     Alumina  which meets the minimum  specifications  set forth in Exhibit A to
     this Agreement, the Operator may, but shall not be required to, accept such
     Alumina for  conversion.  If such Alumina is accepted for  conversion,  the
     Operator shall determine the  difference,  if any, in costs of handling and
     processing such Alumina into Molten Metal,  and any increase in costs shall
     be for the account of such Owner.  The amount of any such increase shall be
     determined by the Operator,  and shall be subject to possible adjustment as
     provided in Section 5.7.5.

     Section 7.3 Title.

          7.3.1  Title to the  Alumina  furnished  by an Owner and to the Molten
     Metal to which that Owner is entitled hereunder and to the Primary Aluminum
     cast  therefrom  shall be in that  Owner,  provided  that where  Alumina or
     Molten Metal is commingled  in storage or processing  each Owner shall have
     an undivided  interest in such Alumina to the extent of the amount supplied
     and in such Molten Metal to the extent of its Basic Tonnage plus  Allocated
     Excess Tonnage, if any.

          7.3.2 At an Owner's  request,  the Operator  shall (i) issue a holding
     certificate in customary form, or (ii) execute such financing statements or
     documents  of similar  nature as may be  requested by the Owner to evidence
     its ownership of Alumina, Molten Metal or Primary Aluminum, as the case may
     be.

     Section 7.4 Shipment, Delivery, Sampling and Weighing.

          7.4.1 Production Schedules and Deliveries.

               (a) So long as the Aluminum Supply  Agreement shall be in effect,
          Molten  Metal  produced  at the  Plant  shall  be  allocated  first to
          delivery under and in accordance with the terms of the Aluminum Supply
          Agreement,  for the  credit  of each  Owner  in  accordance  with  its
          Interest.

               (b)  Primary  Aluminum  produced  at  the  Cast  House  shall  be
          delivered to the Owner entitled  thereto  pursuant to its instructions
          immediately  upon  completion of production of such Primary  Aluminum.
          Deliveries  shall be made to the  Owners  at the  Plant on rail  cars,
          trucks or other forms of transport.


                                       23


               (c) The Owners shall be advised  periodically of Plant production
          schedules  and the  Owners  shall  arrange  among  themselves  to take
          delivery  of  Molten  Metal or  Primary  Aluminum  in  amounts  and at
          intervals  which are consistent with the Plant's  production  capacity
          and  storage  facilities.  If the  Owners  are  unable to agree upon a
          schedule  consistent with the Plant's production  capacity and storage
          facilities,  deliveries shall be made by the Operator pursuant to this
          Section 7.4.1 in as equitable a manner as possible,  giving due regard
          to the Basic Tonnages and Allocated Excess Tonnages of the Owners.

          7.4.2  Failure to Take  Delivery.  If  production is lost or increased
     costs are  incurred  due to the  failure  of an Owner to take  delivery  of
     Primary  Aluminum  in  accordance  with  established  schedules,  the costs
     resulting from such reduced  production or increased costs shall be for the
     account of such Owner.  The amount of any such costs shall be determined by
     the  Operator,  and shall be subject to possible  adjustment as provided in
     Section 5.7.5.

          7.4.3 Sampling, Analysis and Weights.

               (a) The  Owners  Committee  shall  from  time  to time  establish
          procedures for representative sampling and analysis of Alumina, Molten
          Metal and Primary  Aluminum in accordance with good industry  practice
          to insure that the Alumina  delivered  to the Plant,  the Molten Metal
          produced at the Plant and Primary Aluminum received by the Owners from
          the Plant comply with the quality standards  established by the Owners
          Committee. The Operator shall conduct such representative sampling and
          analysis in accordance  with the procedures  established by the Owners
          Committee.

               (b) Unless the Owners Committee unanimously agrees otherwise, the
          Operator shall use its best efforts to produce Molten Metal (i) first,
          in accordance with the specifications therefore in the Aluminum Supply
          Agreement,  and  (ii)  thereafter,  which  has  a  minimum  purity  of
          ninety-nine  and  seven-tenths  percent  (99.7%)  aluminum and Primary
          Aluminum which meets Aluminum Association standards.

               (c) The quantity of Alumina  delivered in each shipment  shall be
          taken from the bill of lading for that  shipment,  provided  that such
          weight may be  confirmed or checked by vessel  displacement  survey in
          light  and  loaded  condition  at the  Plant  or,  at  the  Operator's
          discretion,  may be  determined  or  checked  by  scale  weights.  The
          quantities  of Molten Metal and Primary  Aluminum  delivered  shall be
          determined  by  scale  weights.  Weights  shall  be  certified  by the
          Operator to the Owners and the same weighing  devices or methods shall
          be uniform on  shipments  to the Owners.  Analyses and weights so made
          shall be presumptively correct, but each Owner shall have the right to
          investigate  such  analyses and weights and the method of  determining
          same and to check the same by other  analyses  and weights made at its
          own  expense,   and  mistakes  when  ascertained   shall  be  promptly
          corrected.


                                       24


          7.4.4 Storage.

               (a) If an  Owner so  requests,  the  Operator  shall  place  such
          Owner's Primary Aluminum in storage at the Plant for a handling charge
          covering costs which shall be determined by the Operator and billed to
          that Owner.

               (b)  At  an  Owner's  request,   the  Operator  shall  take  such
          commercially  reasonable  measures as  appropriate  to  segregate  all
          Primary Aluminum stored for that Owner.

               (c) As of the end of each  calendar  month,  the  Operator  shall
          inform each of the Owners  regarding the quantity and  composition  of
          Primary Aluminum products in storage.

          7.4.5  Markings.  At an Owner's  request and at such Owner's cost, the
     Operator shall mark all Primary Aluminum  products owned by that Owner with
     a  distinctive  mark  acceptable to that Owner which shall be sufficient to
     identify that product as the property of that Owner.

     Section 7.5 Cast House.

          7.5.1 Use of Equipment in Cast House.

               (a) The Cast House time  available  for casting  Molten  Metal on
          behalf  of the  Owners  shall  be  allocated  between  the  Owners  in
          proportion to their  respective  Basic  Tonnages and Allocated  Excess
          Tonnages, if any.

               (b) Not later than 25 days before the  beginning of each calendar
          month,  the  Owners  shall  notify the  Operator  as to the Cast House
          capacity for which they wish to subscribe with respect to each form of
          Primary  Aluminum.  When the Cast House  capacity so subscribed  for a
          particular form of Primary  Aluminum  exceeds the available  capacity,
          then the Operator  shall allocate the available  capacity  between the
          Owners in  proportion  to their Basic  Tonnages and  Allocated  Excess
          Tonnages,  if  any,  and  shall  consult  with  each  Owner  regarding
          alternative forms of Primary  Aluminum.  Not later than 18 days before
          the  beginning of such  calendar  month the  Operator  will notify the
          Owners of the Cast House  capacity  allocated  to them with respect to
          each form of Primary Aluminum.

               (c) If during any  calendar  month the actual  production  of any
          form of Primary Aluminum by the Cast House is less than the Cast House
          capacity  subscribed  for in such  period  for  that  form of  Primary
          Aluminum, the Cast House capacity allocated to each Owner with respect
          to that form of Primary Aluminum shall be reduced in proportion to the
          Owners'  respective  Allocated  Excess  Tonnages  and, if there is any
          remaining deficiency, such allocated capacity shall then be reduced in
          proportion  to  the  Owners'   respective   Basic  Tonnages.   Similar
          adjustments  shall  be made to the  extent  that the  Cast  House  has
          insufficient capacity to produce alternative forms of Primary Aluminum
          requested by an Owner as a result of a reduction in allocated capacity
          under the preceding sentence.

               (d) The rules  governing the allocation of Cast House capacity to
          give effect to the  provisions  of clauses  (a) - (c) of this  Section
          7.5.1 shall be determined by the Owners Committee.


                                       25


                                  Article VIII

                             INSURANCE AND CASUALTY

     Section 8.1 Insurance.

          8.1.1  Coverage  Requirements.  The Operator shall be, and shall cause
     each of the  Owners  to be, a named or  additional  insured  on all  public
     liability, property and casualty insurance policies applicable to the Plant
     and the Plant Assets. The Operator shall also maintain such other insurance
     relating to  conversion  operations  of the Plant  necessary to protect the
     Owners'  interests,  including  insurance on Alumina upon  discharge at the
     Plant and  Primary  Aluminum  while in storage at the  Plant.  The  initial
     insurance  requirements  are set forth in Exhibit E, and such  requirements
     may be  changed  from  time  to time by the  unanimous  vote of the  Owners
     Committee.

          8.1.2  Product  Liability  Coverage.  The Owners  agree that each will
     separately  insure for all  product  liability  claims  relating to Primary
     Aluminum  sold by such  Owner.  The  Owners  further  agree  that each will
     indemnify and hold the other Owner and the Operator harmless from any loss,
     cost,  damages or  liability  of any nature  whatsoever  arising out of any
     product liability claim relating to such Owner's Primary Aluminum, and that
     any such liability shall survive the  termination of this  Agreement.  Each
     Owner will deliver to the Operator and to the other Owner  certificates  of
     insurance  evidencing their product  liability  coverage with  commercially
     reasonable  limits and containing  endorsement  naming the other Owner, its
     Affiliates  and  the  Operator  as  additional   named  insureds,   waiving
     subrogation  against the other  Owner,  its  Affiliates  and the  Operator,
     providing  that such coverage  shall be primary to any other coverage as to
     such  Owner's  Primary  Aluminum  and  product   liability  claims  arising
     therefrom  and  providing  at  least  ten  (10)  business  days  notice  of
     modification or cancellation of coverage.

     Section  8.2  Casualty.  If the Plant or the Plant  Assets  are  damaged or
destroyed  in whole or in part,  in any respect,  the Operator  shall repair the
damaged portion or rebuild or replace the destroyed portion in such manner as to
restore the same as nearly as possible to the capacity thereof immediately prior
to such damage or destruction,  except that if the cost of repairing such damage
exceeds $2.5 million,  the Owners must consent unanimously to such repairs.  The
Operator  shall  not be  obligated  to  expend  for such  purpose  more than the
proceeds of its  insurance  plus any amounts paid to it by the Owners on account
of any deductibles and self-insurance.

     Section 8.3 Condemnation.  In the event of condemnation of a portion of the
Plant which  adversely  affects the  production  capacity or  efficiency  of the
Plant,  the  Owners  shall  share in the  production  of the Plant in the manner
specified in Section 7.1.5. The Operator shall take such action as is necessary,
consistent with prudent business  practice,  to use the proceeds of condemnation
to restore the capacity and  efficiency of the Plant as it or they existed prior
to such condemnation,  unless otherwise  instructed by the Owners, in which case
the  proceeds  shall be  divided  between  the  Owners  in  proportion  to their
respective Interests.


                                       26


                                   Article IX

                           RESTRICTIONS ON DISPOSITION
                            OF PROPERTY OR INTERESTS

     Section 9.1 Transfers of Interests.

          9.1.1 Restriction.  Except as otherwise provided in this Article IX or
     in Article X, neither this Agreement nor any Interests shall at any time be
     transferred  by any Owner without the express prior written  consent of the
     other Owner.  For purposes of this Article IX and Article X, transfer shall
     mean any sale, assignment, conveyance, exchange or other transfer.

          9.1.2  Transfers  to  Affiliates.  An Owner may  transfer  its  entire
     Interest to an Affiliate,  provided (a) such Affiliate shall become a party
     to  this  Agreement  and  shall  expressly  assume  the  due  and  punctual
     performance of all of the obligations of the transferor hereunder,  (b) any
     such assignment shall not release the transferor from any obligations under
     this Agreement  except to the extent that such obligations are performed by
     the  transferee,  and  (c)  the  Parent  Guarantee  delivered  by a  Parent
     Guarantor  with  respect  to the  obligations  of the  transferor  Owner is
     amended,  if requested  by the other  Owner,  to include a guarantee of the
     obligations of such transferee.

          9.1.3 Transferee to Become Party to this Agreement.  In the event of a
     transfer to a third Person of all or a portion of an  Interest,  such third
     Person shall execute and become a party to this Agreement and such transfer
     shall become  effective only upon such execution.  This Section 9.1.3 shall
     not apply to a Secured  Party which shall acquire an Interest in accordance
     with Section 9.2.3, unless such Secured Party shall retain and not transfer
     its  ownership of the acquired  Interest,  but shall apply to any Person to
     which a Secured Party shall transfer such Interest.

          9.1.4  Reconstitution  of  Interests.  The  Owners  acknowledge  that,
     subject to their unanimous consent,  it may at some future time be in their
     mutual best interests to reconstitute each of their Interests by each Owner
     conveying to the other Owner an undivided interest in the conveying Owner's
     Owner's Plant Assets (the "Reconstitution"),  so that thereafter each Owner
     would hold a pro rata undivided interest as tenant in common (having waived
     all  rights of  partition)  in all of the fixed and  movable  property  and
     assets then comprising the Plant. Any such Reconstitution  shall not affect
     the rights  and  obligations  of the  parties  set forth in this  Agreement
     except as specifically provided for in this Article IX and Article X.

          9.1.5  Transfers of Part of an Interest.  Subject to Section 9.1.6, in
     the  event of a  transfer  by an  Owner of a  portion  of an  Interest,  as
     provided  for herein,  before the  occurrence  of the  Reconstitution,  the
     transferring  Owner and the  transferee  shall agree upon the percentage of
     the total Owner's Plant Assets of all of the Owners that is  represented by
     the Owner's Plant Assets of the transferring Owner to be transferred to the
     transferee  (assuming  that the five pot lines at the Plant  constitute one
     hundred  percent (100%) of such total Owner's Plant Assets and that one pot
     line constitutes  twenty percent (20%) of such total Owner's Plant Assets),
     and the remainder of the portion of the Interest to be  transferred  by the
     transferring  Owner  to  the  transferee  shall  consist  of  an  undivided
     interest,  as tenant in common, in an equal percentage in the Jointly-Owned
     Property and an equal  percentage  of the  membership  units of CAK. In the
     event of a transfer by an Owner of a portion of an Interest as provided for
     herein  after the  occurrence  of the  Reconstitution,  the  portion of the
     Interest so transferred shall consist of an undivided  interest,  as tenant
     in common, in the Plant Assets, in an equal percentage in all of such Plant
     Assets, together with an equal percentage of the membership units of CAK.


                                       27


          9.1.6 Minimum Interest.  Except for the transfers  involving all of an
     Owner's  Interest or as a result of the  application  of Section  10.5,  no
     transfer shall be permitted under this Owners  Agreement if, as a result of
     such transfer,  either the new Owner or the  Transferring  Owner would hold
     less than a twenty percent (20%) Interest in the Plant.

     Section 9.2 Voluntary Encumbrances.

          9.2.1  Restrictions.  An Owner (for  purposes of this Section 9.2, the
     "Granting Owner") may agree to grant a mortgage or otherwise agree to grant
     a Lien on its Interest or any portion thereof, provided

               (a) the rights of the  mortgagee or  lienholder  (for purposes of
          this  Agreement,  the "Secured  Party") are  expressly  limited to the
          Interest of the Granting  Owner (to the extent so  encumbered) in such
          assets and shall not impair or otherwise  affect title to the Interest
          of the  non-granting  Owner  (including  its  transferees  under  this
          Article IX) or its right to any increase in the value of its Interest,
          and any rights in the encumbered  Interest which the Secured Party may
          assert, acquire or transfer, whether through foreclosure or otherwise,
          shall in all  events be  subject to the  non-granting  Owner's  rights
          under this Agreement  (including  without limitation the rights of the
          non-granting Owner under Section 2.3.2 and Articles IX and X), and

               (b) prior to the  granting  of any such Lien by a Granting  Owner
          the  non-granting  Owner  shall have  approved in writing the form and
          substance of the provisions required under clause (a) and the validity
          and  enforceability  of the  document  in which  such  provisions  are
          contained, and

               (c) the Granting  Owner shall notify the  non-granting  Owner and
          the  Operator  in  writing  of  the  identity,   address  and  contact
          information  of the Secured Party and,  promptly  upon the  occurrence
          thereof, the Granting Owner shall notify the non-granting Owner of the
          exercise of any rights with respect to the Lien by the Security  Party
          (other than rights to access and/or information) and/or the release of
          the Lien.

          9.2.2 Acknowledgment of Liens.

               (a) GAC  acknowledges  that NSA and its Affiliates are, as of the
          date hereof,  granting a Lien on the Interest of NSA to secure in part
          the Notes  (and may grant a Lien in  connection  with any  refinancing
          thereof),  and  that  GAC has  reviewed  and  approved  the  form  and
          substance  of  the  mortgage  and  other   documents  and  instruments
          evidencing  such  Lien  and the  validity  and  enforceability  of the
          provisions  setting  forth the rights of GAC, as Owner  hereunder,  as
          incorporated  therein,  and that the grant of such Lien and the filing
          of such mortgage and other documents, in and of themselves,  shall not
          give rise to any  rights of GAC to  acquire  the  Interest  of NSA set
          forth in this Article IX, including  without  limitation under Section
          9.3.


                                       28


               (b) The Owners  acknowledge  and agree that either Owner shall be
          entitled  to grant a Lien on its  Inventory  or any  portion  thereof;
          provided however,  that any such Lien shall be subject to the right of
          the non-granting Owner, if such Owner shall exercise its rights to use
          the Interest of a Defaulting  Owner under Section  10.4.1,  to use the
          Inventory of such  Granting  Owner or Defaulting  Owner.  The Operator
          shall  be  entitled  to  take  such  actions  as  may be  required  in
          connection  with the  enforcement of the rights of such Secured Party,
          provided  that  any  increased  costs  incurred  by  the  Operator  in
          connection  therewith  shall  not be  Operating  Costs  but  shall  be
          chargeable  to the  Owner  granting  such  Lien as a cost  related  to
          financing.

          9.2.3  Condition  Precedent to Enforcement of Voluntary  Encumbrances.
     Prior to the exercise by a Secured  Party of any  foreclosure  rights under
     any Lien granted by a Granting  Owner on its  Interest,  the Secured  Party
     shall  give at least  sixty (60) days'  prior  written  notice to the other
     Owner of its intent to exercise such rights and the  principal  amount (and
     not any  interest)  secured by the Lien which is in default,  and the other
     Owner shall have the right (but not the  obligation) to acquire all or part
     of the  Interest of the Granting  Owner upon payment to the Granting  Owner
     (without  prejudice  to the rights of the Secured  Party in such  proceeds)
     within that sixty (60) day period of the Fair Market  Value of the Interest
     or part  thereof  being  purchased.  The  Granting  Owner  shall  take  all
     necessary  steps to ensure that the  transfer of the  Interest  (or portion
     thereof as  applicable) is free and clear of the Lien of the Secured Party.
     In the event that the other Owner shall have  delivered a written notice to
     the Granting Owner of its intent to exercise the right granted  pursuant to
     this Section  9.2.3 and shall have made payment of the amount  provided for
     in the  immediately  preceding  sentence,  then the  Granting  Owner  shall
     execute and deliver to the non-granting  Owner  instruments  evidencing the
     transfer of its Interest (or if  appropriate,  portion of its  Interest) to
     the non-granting Owner. The non-granting  Owner's rights under this Section
     9.2.3 are in addition to its rights  under the  provisions  required  under
     Section  9.2.1  and in  addition  to any  claims  for  damages  which  such
     non-granting Owner may have against the Granting Owner.

          9.2.4 Secured Party's  Rights;  Non-Granting  Owners'  Rights.  If the
     non-granting Owner fails to exercise its right to purchase all or a part of
     the Granting  Owner's  Interest as provided in Section  9.2.3,  the Secured
     Party shall have the right in the name and on behalf of the Granting Owner,
     to sell the  Granting  Owner's  Interest  or that part not  acquired by the
     other Owner,  subject in all events to the  prohibition  against  partition
     provided for in Section 2.3.2 and the  requirements  of Sections  9.1.3 and
     9.1.5, but not subject to the provisions of Sections 9.3.2(a),  (b), (c) or
     (f) or 9.4. The  transferee  shall be subject to the provisions of Sections
     9.3.2(d)(ii), (iii) and (iv) and 9.3.2(g).

     Section 9.3 Right of First Refusal.

          9.3.1  Restrictions.  Absent the express prior written  consent of the
     other Owner and except for transfers  permitted  pursuant to Sections 9.2.3
     and 9.4.1 and  transfers to the other Owner  pursuant to Section  10.5,  no
     Owner shall offer to transfer, or transfer, all or any part of its Interest
     to any Person (other than as provided in Section  9.1.2) except as provided
     in this Section 9.3.


                                       29


          9.3.2 Right and Procedure.

               (a) An Owner that  desires to transfer  its Interest or a part of
          the Interest ("Transferring Owner") to a third Person, and has reached
          basic  agreement  with  such  third  Person  regarding  the  terms and
          conditions  of the  transfer,  must give  notice  to the  other  Owner
          specifying  in detail the price and other  terms and  conditions  upon
          which the  Transferring  Owner  proposes to sell its  Interest or part
          thereof to the third Person,  the  percentage  of such Interest  being
          transferred and the name of the third Person.

               (b) Within  sixty (60) days after such  notice,  the other  Owner
          shall notify the Transferring Owner whether it desires to acquire,  at
          the  price  and  on  the  terms  and   conditions   contained  in  the
          Transferring Owner's notice, the Transferring Owner's Interest or part
          thereof  being  offered.  If the other  Owner  does not so notify  the
          Transferring   Owner  it  shall  be  deemed  to  have   rejected   the
          Transferring Owner's offer.

               (c) If the other Owner accepts the  Transferring  Owner's  offer,
          the  Transferring  Owner and the other  Owner  shall be deemed to have
          contracted  for the  sale and  purchase  of the  Transferring  Owner's
          Interest or part thereof on the terms and  conditions  offered,  and a
          closing of the transaction in accordance with the terms and conditions
          of the offer  shall be made  within  ninety (90) days after the deemed
          acceptance.

               (d)  If  the  other  Owner  does  not  elect  to   purchase   the
          Transferring  Owner's Interest or part thereof, the Transferring Owner
          during the one hundred  eighty (180) days following the sixty (60) day
          period under clause (b) may transfer (on the same terms and conditions
          offered  to the other  Owner)  its  Interest  or part  thereof  to the
          proposed transferee identified as provided in subsection (a) above (if
          applicable),  provided  that the  Transferring  Owner or the  proposed
          transferee,  as the case may be,  shall  deliver to the other Owner at
          such closing,  as a condition to the transfer,  executed originals (in
          form and substance reasonably  satisfactory to the other Owner) of the
          following documents:

                    (i)  certificates  of officers  of each of the  Transferring
               Owner and the  transferee  confirming  the terms  under which the
               Transferring  Owner is transferring  the Interest or part thereof
               to the transferee;

                    (ii) if the transferee does not have a Tangible Net Worth at
               least equal to  $200,000,000,  it shall (i) provide to each other
               Owner and the  Operator  a  guarantee,  in the form of the Parent
               Guarantee  attached hereto as Exhibit B-3, of an Affiliate of the
               proposed transferee or other corporation which has a Tangible Net
               Worth at least equal to  $200,000,000,  with  Tangible  Net Worth
               under this clause 9.3.2(d)(ii) to be evidenced by the most recent
               audited  financial  statement of the transferee or its guarantor,
               or by a written  opinion of a nationally  recognized  independent
               accounting   firm;   or  (ii)  deliver  to  the  other  Owner  an
               irrevocable  letter of credit drawn on a U.S. bank holding a long


                                       30


               term  rating not less than "A" or  equivalent  from a  nationally
               recognized  financial rating agency.  Such letter of credit shall
               be in a form reasonably acceptable to the other Owner, shall name
               the Operator as  beneficiary,  shall be in an amount equal to one
               half of the  Owner's  Interest  times the  annual  operating  and
               capital budget then in effect in respect of the Plant,  and shall
               have an expiry date not shorter  than twelve (12)  months,  and a
               replacement   letter   of  credit  or   Guarantee   meeting   the
               requirements of this Section  9.3.2(d)(ii)  shall be delivered to
               the Operator no less than thirty (30)  business days prior to the
               expiry of the then current letter of credit.

                    (iii) the proposed  transferee's  written  undertaking to be
               bound by all of the terms and  conditions of this Agreement as an
               Owner; and

                    (iv)  such   opinions  of  legal  counsel  to  the  proposed
               transferee and any guarantor as the other Owner shall  reasonably
               require.

               (e) The Transferring Owner shall pay all costs of transfer of its
          Interest.

               (f) If the Transferring Owner fails to consummate the third party
          transfer within the one hundred eighty (180) day period referred to in
          Section  9.3.2(d),  the  first  rights  of  the  other  Owner  in  the
          Transferring Owner's Interest shall be deemed to be revived and notice
          under clause (a) and  compliance  with the other terms of this Section
          9.3 shall be required in respect of any transfer thereafter.

               (g)  Following  a  transfer  of an  Interest  or part  thereof in
          accordance with the provisions of this Section 9.3, if at any time the
          Parent  Guarantor  providing a  guarantee  of the  obligations  of the
          transferee  shall cease to have a Tangible Net Worth at least equal to
          $200,000,000,  as  evidenced  by such Parent  Guarantor's  most recent
          unaudited quarterly financial statements, then the transferee Owner or
          such Parent  Guarantor shall promptly notify the other Owner or Owners
          and shall deliver promptly to the other Owner or Owners an irrevocable
          standby  letter  of  credit  meeting  the   requirements   of  Section
          9.3.2(d)(ii) and replacements thereof as required thereby.

     Section 9.4 Involuntary Transfers or Encumbrances.

          9.4.1  Deemed  Offer to  Transfer.  Except for  transfers  pursuant to
     Section  9.2.3,  if the  Interest  (or any portion  thereof) of an Owner is
     involuntarily  transferred  or encumbered as a result of judicial  process,
     attachment,  execution or judicial  sale and such  involuntary  transfer or
     encumbrance is not set aside or discharged within sixty (60) days, then the
     Interest  held by that Owner shall be deemed to have been  offered for sale
     to the other Owner on the date the other Owner  receives  actual  notice of
     the  involuntary  transfer or  encumbrance.  The other Owner shall have the
     option,  exercisable  before the  earlier to occur of (i) the date on which
     the involuntary transfer or encumbrance is set aside or discharged, or (ii)
     the date  which is sixty  (60)  days  after  such  actual  notice to it, to
     purchase all or, if the  Reconstitution  shall have occurred,  such part as
     the other  Owner  shall  determine,  of the  involuntarily  transferred  or
     encumbered  Interest  for a price  equal to Fair  Market  Value  thereof as
     determined  pursuant to Section  9.4.2,  payable in cash. The provisions of
     Section 9.3 shall not apply to any such involuntary transfer.


                                       31


          9.4.2 Fair Market  Value.  "Fair Market Value" shall mean for purposes
     of this Agreement the fair market value of the relevant Interest or portion
     thereof agreed upon by the purchasing  Owner and the other Owner, a Secured
     Party and/or a trustee in  bankruptcy,  as the case may be (an  "Interested
     Party"),  subject to the  proviso  below,  or as  otherwise  determined  as
     provided in this Section 9.4.2. In the event that, within ten (10) days (i)
     after  receipt  by the  Owner  entitled  to  exercise  a right to  purchase
     pursuant to Section  9.2.3 or 9.4.1,  of the notice  provided for under the
     relevant Section,  or (ii) delivery of notice by a non-defaulting  Owner of
     an exercise of its rights pursuant to Section 10.5, as the case may be, the
     purchasing Owner and the Interested Party cannot agree upon the fair market
     value of the Interest or portion  thereof to be transferred,  then,  within
     five (5) days after such ten (10) day  period has  expired,  such Owner and
     Interested Party will select an independent  appraiser,  who will determine
     the then-current fair market value of the Interest or portion thereof.  The
     Owners hereby agree that (x) any appraiser  selected shall be an investment
     bank or other  independent  appraiser  with  expertise in the  appraisal of
     aluminum reduction  facilities and (y) the value of the Interest or portion
     thereof shall be calculated as (A) a value per Ton of production  capacity,
     multiplied by (B) the rated  production  capacity,  in Tons of Molten Metal
     per year, represented by the Interest or portion thereof to be transferred,
     provided  that,  in the case of an  appraisal  of the Interest or a portion
     thereof of NSA,  the Fair  Market  Value  determined  for  purposes  of any
     transaction  shall in no event be less than the amount determined using the
     applicable  methodology set forth in the indenture  entered into by Century
     with  respect  to the  Notes (or such  methodology  as may be  required  by
     applicable law governing such  indenture),  so long as such indenture is in
     force.  Such appraiser will determine the fair market value of the Interest
     or portion thereof within twenty-five (25) days following its selection. In
     the event that,  within the five (5) day period provided for the parties to
     select an  appraiser,  the  relevant  parties  are  unable to agree upon an
     appraiser,  each of them will  within  an  additional  five (5) days  after
     expiration of such period select a professional designee and such designees
     together shall select an appraiser within five (5) days of their selection.
     In the  event  that,  within  the  five  (5) day  period  provided  for the
     designees to select an appraiser, the designees are unable to agree upon an
     appraiser,  each of the relevant parties will within an additional five (5)
     days after  expiration of such period select an  independent  appraiser and
     such appraisers together will select a third independent  appraiser meeting
     the criteria specified above, whose  determination of the fair market value
     of the  Interest  or  portion  thereof  will be final  and  binding  on all
     parties.  This third (3rd)  appraiser  will have thirty (30) days following
     its selection to determine the fair market value of the Interest or portion
     thereof. The costs and expenses of appraisal shall be borne by the Granting
     Owner  or  Defaulting  Owner,  as the  case may be.  In the  event  that an
     appraisal  in the  manner  described  above  is not  completed  within  the
     relevant sixty (60) day period provided for a purchasing  Owner to purchase
     an Interest or portion  thereof  pursuant to Section 9.4.1 (but not Section
     9.2.3 or  10.5.2(b)),  then such period shall be extended as necessary  for
     the  completion  of the  appraisal,  but not for a  period  longer  than an
     additional  thirty (30) days,  and  payment of the Fair Market  Value as so
     determined  shall be made by the  purchasing  Owner within ten (10) days of
     the final determination thereof.

     Section 9.5  Transfer of Ownership  of an Owner.  Each Owner shall  remain,
either directly or indirectly,  wholly-owned  by its respective  parent which in
the case of NSA shall be Century,  and in the case of GAC shall be Glencore  or,
in the case of an Owner which  acquired its  Interest  under this Article IX, by
its  ultimate  parent  company on the date of transfer  of the  Interest to that


                                       32


Owner.  Failure to maintain such ownership of an Owner without the prior written
consent of the other  Owner  (which  consent  may be freely  withheld)  shall be
deemed to be a default of that Owner  under this  Agreement  and, in addition to
any claims for  damages  which the other Owner may have  against the  defaulting
Owner and its Parent  Guarantor  (if any),  the other Owner may require that the
defaulting  Owner's  Interest be sold and  purchased in the manner  provided for
under Section 10.5. The restrictions on transfer of ownership of an Owner by its
parent  company set forth in this Section 9.5 shall not apply to a Secured Party
which shall  acquire  ownership of an Interest  through the  enforcement  of its
rights under a Lien on such Interest (unless such Secured Party shall retain for
its own  interest,  and not  transfer,  such  Interest),  but shall apply to any
Person to which such Secured Party transfers such Interest.

     Section  9.6  Appointment  of  Operator  Upon  Transfer.  In the event of a
transfer  by GAC to a  non-Affiliate  of GAC of all or part of its  Interest  in
accordance  with the  provisions  of this Article IX, NSA or an Affiliate of NSA
shall  have the  right  (but not the  obligation),  in its sole  discretion,  to
terminate the  appointment of CAK as Operator and to appoint an Affiliate of NSA
as  replacement  Operator.  In the event of a transfer  of the  Interest  of NSA
pursuant to a foreclosure on a voluntary Lien in accordance  with Section 9.3.2,
or an  involuntary  transfer as specified in Section 9.4, GAC or an Affiliate of
GAC shall  have the right but not the  obligation,  in its sole  discretion,  to
terminate  the  appointment  of CAK as  Operator  and to  appoint a  replacement
Operator.  In the event of the termination of the appointment of CAK as Operator
in  accordance  with the first or  second  sentence  of this  Section  9.6,  the
appointment of a replacement Operator shall become effective upon the acceptance
by the replacement Operator of such appointment.

     Section 9.7 Closings.  The closings for any transfer of an Owner's Interest
pursuant to Section 9.2.3, 9.3.2(c), 9.3.2(d), 9.4.1 or 10.5 shall take place at
the principal office of the Operator or at such other location as the parties to
the closing may mutually  agree.  The  Transferring  Owner shall deliver (i) the
requisite  instruments  of conveyance,  sale and assignment  with respect to the
Transferring   Owner's   Interest  in  the  Owner's  Plant  Assets  and  in  the
Jointly-Owned  Property as tenant in common, and (ii) all other documents as may
be  reasonably  requested  by any  purchasing  owner  in order  to  confirm  the
Transferring  Owner's title to and transfer of its Interest and the authority of
its agent,  officer or attorney to act in connection  with each of the transfers
referred to in clauses (i) and (ii) above.

                                   Article X

                                     DEFAULT

     Section 10.1 Events of Default.  Each of the following shall  constitute an
"Event of  Default"  with  respect  to an Owner  (the  "Defaulting  Owner")  for
purposes of this Article X:

          10.1.1 the failure by that Owner to pay amounts due to the Operator or
     the other Owner under this  Agreement  within three (3) full  business days
     (based on  recipient's  business  days and its local  banking  hours) after
     notice by the Operator or such other Owner demanding such payment be made;

          10.1.2 that Owner  transfers or encumbers,  or attempts to transfer or
     encumber,  any of its Interest in violation of the terms of Sections 9.2 or
     9.3;


                                       33


          10.1.3  any  default  by  that  Owner  (as an  owner  in any  material
     obligation  under this Agreement (other than as described in clauses 10.1.1
     or 10.1.2 above) which remains uncured for thirty (30) days after notice of
     such default from the other Owner;

          10.1.4 the filing by that Owner,  or any other Person  which  directly
     owns fifty-one percent (51%) or more of that Owner's shares of voting stock
     (that  Owner's  "Parent"),  or (if  different  from the  Parent) the Parent
     Guarantor of that Owner's obligations under this Agreement,  of a voluntary
     petition  in  bankruptcy,   or  for   reorganization,   rehabilitation   or
     dissolution or other proceeding analogous in purpose or effect;

          10.1.5 the filing  against  that Owner or its Parent or (if  different
     from the Parent) the Parent  Guarantor  of that Owner's  obligations  under
     this  Agreement,  by its  creditors  of a  petition  in  bankruptcy  or for
     reorganization,  rehabilitation,  involuntary liquidation or dissolution or
     other proceeding  analogous in purpose or effect, which is not dismissed or
     stayed within sixty (60) days of filing; or

          10.1.6 any act by that Owner or its Parent or (if  different  from the
     Parent)  the  Parent  Guarantor  of that  Owner's  obligations  under  this
     Agreement, which results in a default under Section 9.5.

     Section 10.2  Constitution of Owners Committee Upon Event of Default.  Upon
the  occurrence of an Event of Default and until that Event of Default is cured,
the  Defaulting  Owner shall lose its membership and voting rights on the Owners
Committee,  and the attendance of a Representative of the Defaulting Owner shall
not be required to constitute a quorum for actions by the Owners Committee.

     Section 10.3 Notification of Secured Party; Right to Cure.  Notwithstanding
anything to the  contrary  set forth in this Article X, prior to the exercise of
any remedies  provided for herein by a non-defaulting  Owner upon the occurrence
of an Event of Default by a Defaulting  Owner, such  non-defaulting  Owner shall
have provided or caused to be provided,  to any Secured Party of whose existence
it has  received  written  notice  pursuant  to Section  9.2.1(c) at its address
provided in such notice, written notice of such Event of Default and a period of
(a) five (5)  days,  in the case of an Event  of  Default  which  consists  of a
payment  default or (b) thirty (30) days with respect an Event of Default  which
is not a payment  default,  shall  have  elapsed  since the date of such  notice
during  which the  non-defaulting  Owner has  permitted  the  Secured  Party the
opportunity to cure the Event of Default.

     Section 10.4 Use of Defaulting Owner's Interest.

          10.4.1 Right of Non-Defaulting Owner.

               (a) If an Event of  Default is not cured  within  the  applicable
          time period provided  therefor after notice of default is given to the
          Defaulting Owner by the nondefaulting  Owner of its intent to exercise
          its rights  under  this  Section  10.4,  the  nondefaulting  Owner may
          exercise the right to use the Defaulting  Owner's Interest and perform
          the  obligations  of the  Defaulting  Owner in place of the Defaulting
          Owner,  including  using the Defaulting  Owner's  Alumina or supplying
          quantities of Alumina  sufficient for the production of the Defaulting
          Owner's Basic Tonnage and Allocated Excess Tonnage.  The nondefaulting
          Owner  shall  thereby  become  entitled to sell for the account of the
          Defaulting  Owner all Molten  Metal or Primary  Aluminum  to which the
          Defaulting Owner would otherwise be entitled.


                                       34


               (b)  Proceeds  received  from such sales in excess of one hundred
          six  percent  (106%) of the total  cost of  producing  the  Defaulting
          Owner's share of Primary Aluminum,  including  without  limitation the
          cost of Alumina,  Operating Costs, Extras and freight in (for Alumina)
          and freight out (for Primary Aluminum) (collectively,  for purposes of
          this Section 10.4 and Section  10.5,  "Total  Costs") shall be applied
          first to payment of any amounts  owed by the  Defaulting  Owner to the
          non-defaulting  Owner,  then to  payment  of any  amounts  owed by the
          Defaulting  Owner to the  Operator,  and the  remainder  of the excess
          above  106%,  if  any,  shall  be paid to the  Defaulting  Owner.  The
          non-Defaulting  Owner shall be entitled to retain the excess remaining
          from the one hundred six percent  (106%) of Total Costs after  payment
          of such costs, to defray its own expenses.

          10.4.2  Non-Defaulting  Owner's Costs, etc. The  non-defaulting  Owner
     which has  elected  to  exercise  its right to use the  Defaulting  Owner's
     capacity  under this Section 10.4 shall have the right at any time to elect
     to treat  the  costs,  loss or  damage  resulting  to it from such use as a
     monetary  default as provided in Section 10.7. It shall exercise such right
     by giving  notice to the  Defaulting  Owner of the amount of expense it has
     incurred on behalf of the Defaulting Owner.

     Section 10.5 Option to Purchase Defaulting Owner's Interest.

          10.5.1 Agreement on Liquidated Damages.

               (a) The Owners  acknowledge  that if a Defaulting  Owner fails to
          cure an Event of  Default  within  thirty  (30)  days of notice by the
          non-defaulting  Owner of its intent to exercise  its rights under this
          Section  10.5,  it will be  difficult  to measure  all of the  damages
          resulting from such failure to cure. Therefore, the Owners agree that,
          in addition to the rights of the non-defaulting  Owner provided for in
          Section 10.4.1, if an Event of Default is not cured within thirty (30)
          days after such notice to the  Defaulting  Owner,  then, as reasonable
          liquidated  damages,  the  Defaulting  Owner  shall be  deemed to have
          offered its Interest  for sale to the  non-defaulting  Owner,  and the
          non-defaulting Owner shall be entitled to purchase the Interest of the
          Defaulting  Owner,  at the price  and in the  manner  provided  for in
          Section 10.5.2 below.

               (b) In the event that the  non-defaulting  Owner  shall  purchase
          part  but not  all of the  Defaulting  Owner's  Interest  pursuant  to
          Section 10.5.1(a),  and shall continue to exercise its rights provided
          for in Section  10.4.1 with  respect to the  remaining  portion of the
          Interest  retained by the Defaulting  Owner, then at any time and from
          time to time  thereafter,  subject to  Section  10.5.2(d)  below,  the
          non-defaulting  Owner shall be entitled  upon notice given thirty (30)
          days in advance,  to purchase all or any part of the remaining portion
          of the Interest  retained by the Defaulting  Owner at the then current
          Fair Market Value thereof.


                                       35


          10.5.2  Exercise of Right to Purchase.  In the event of a deemed offer
     of sale by a Defaulting  Owner of its Interest  pursuant to Section 10.5.1,
     the  non-defaulting  Owner  shall be  entitled  to  exercise  its  right to
     purchase as follows:

               (a) the  non-defaulting  Owner shall give notice of its intent to
          purchase the Interest or portion  thereof  within  thirty (30) days of
          the time at which the offer to sell has been deemed to be made;

               (b) with  respect to a purchase by GAC of the Interest of NSA, so
          long as the  indenture  entered  into by Century  with  respect to the
          Notes and any  registered  notes for which such Notes may be exchanged
          is in force,  payment  shall be made in the  manner  and to the extent
          required  under such  indenture,  including  payment within sixty (60)
          days of the date on which the offer to sell was deemed to be made, but
          no later than the date of  transfer of the  Interest,  of an amount in
          cash at  least  equal  to  seventy-five  percent  (75%)  of the  total
          purchase  price,  with the balance to be paid in  accordance  with the
          provisions of Section 10.5.2(c) below; and

               (c) the non-defaulting Owner shall be entitled to make payment of
          (i) the  balance  of the  purchase  price of the  Interest  or portion
          thereof after the payment required pursuant to paragraph (b) above, or
          (ii) in the event that the indenture referred to in such paragraph (b)
          is no longer in force,  the total  purchase  price of the  Interest or
          portion thereof which it has elected to purchase,  in either case from
          fifty  percent  (50%) of the  amount  of Gross  Profits  as  hereafter
          defined,  if any,  derived from the Interest of the  Defaulting  Owner
          during each calendar year and not from any other source.

               (d) Nothing in this Section 10.5 shall  prohibit a Secured  Party
          from  transferring  any  Interest of a  Defaulting  Owner prior to the
          exercise of a right of purchase by the  non-defaulting  Owner, and the
          non-defaulting  Owner shall have no rights under Section 10.2, 10.4 or
          10.5  against  the  transferee  with  respect  to the  default  by the
          Defaulting Owner,  provided that the Secured Party shall have complied
          with Section 9.2.3 or 9.4.1, as applicable.

          10.5.3 "Gross Profits";  "Market Price".  For purposes of this Section
     10.5:

               (a) "Gross  Profits" means an amount,  determined on a cumulative
          annual basis,  with respect to Primary Aluminum produced by use of the
          relinquished Interest of the Defaulting Owner, equal to the excess, if
          any, of (i) the Market Price of Primary Aluminum determined on a daily
          basis over (ii) the Total Costs,  determined  by reference to billings
          from the  Operator.  If the  Plant is  operating  at less  than  Rated
          Capacity,  it shall be assumed  for  purposes  of  calculating  "Gross
          Profits" that the relinquished Basic Tonnage is the operating capacity
          first reduced.

               (b)  "Market  Price"  means  the  mid-point  of the bid and asked
          prices for  unalloyed  ingot,  New York  Merchant  Price  (99.7%),  as
          published  in American  Metal  Market  under the heading  "AMM Closing
          Prices -  Aluminum"  or, if such  publication  ceases,  an  equivalent
          publication.

     Section 10.6  Attorney-in-Fact.  Each Owner hereby irrevocably appoints the
other Owner its  attorney-in-fact  to execute,  file and record all  instruments
necessary to perfect or effectuate  the  provisions of this Article X during the
continuance  of an Event of  Default.  This  power of  attorney  shall be deemed
coupled with an interest.


                                       36


     Section  10.7  Monetary  Defaults.  If an Owner  fails to make any  payment
required under this Agreement,  the non-defaulting  Owner may advance the amount
of the  defaulted  payment on behalf of the Owner in default and treat the same,
together with accrued interest,  as a demand loan bearing interest from the date
of the advance at the  Interest  Rate plus two percent  (2%).  Each Owner hereby
grants to the other a lien upon its  Interest  and a  security  interest  in its
rights under this  Agreement  and in its Interest,  and the proceeds  therefrom,
which shall be junior to any Lien granted in compliance  with Section 9.2.2,  to
secure (a) any loan made hereunder,  including interest thereon,  which shall be
in an  amount  no  greater  than is  reasonably  required  in  order  to pay the
Operating  Costs  attributable  to the  Defaulting  Owner,  and  (b)  reasonable
attorneys  fees  and  all  other  reasonable  costs  and  expenses  incurred  in
recovering  the loan  with  interest  and in  enforcing  such  lien or  security
interest, or both.

     Section 10.8 Appointment of Operator.  In addition to the other rights of a
non-defaulting  Owner  specified in this Article X, in the event of a default by
NSA which is not cured within  thirty (30) days after notice of default is given
to NSA by GAC of its intent to exercise its rights under this Section 10.8,  GAC
shall have the right to terminate the appointment of the Operator and to appoint
a replacement Operator, provided that such replacement Operator shall enter into
an agreement providing for its appointment on terms and conditions substantially
similar to those applicable to the Operator provided for in this Agreement.

                                   Article XI

                                    COVENANTS

     Section 11.1  Inspection.  The Operator  shall afford to the Owners,  their
agents, employees,  accountants and attorneys,  during normal business hours and
on reasonable  notice,  access to and the opportunity to examine and make copies
of all books, records, documents, instruments and papers of or pertaining to the
Plant, any Owners' Plant Assets,  the Jointly-Owned  Property and the operations
of the Plant,  all as they may reasonably  request,  except for documents  which
pertain only to an Owner's  activities in purchasing  Alumina,  selling  Primary
Aluminum,  arranging for  transportation  and other  confidential  matters of an
Owner.

     Section 11.2 Liens.  Except as may be permitted  pursuant to Sections  7.3,
9.2,  10.7 and 11.6,  none of the Owners or the  Operator  shall cause any Liens
(other than tax Liens for taxes not past due) to be created or to exist upon the
Plant, any Owner's Plant Assets or any Jointly-Owned  Property. Each Owner shall
notify the other Owner and the Operator or the Operator  shall notify the Owners
Committee  promptly  after  discovery  of the  creation  of any  Liens  on  such
property,  and shall discharge forthwith all Liens not so permitted for which it
or its employees, agents or contractors are responsible.

     Section 11.3 Notification. Each Owner shall promptly notify the other Owner
and the Operator, or the Operator shall promptly notify the Owners Committee, of
the  occurrence  of any fact or  circumstance  which has or might tend to have a
material adverse effect upon the ownership and operation of the Plant, including
without  limitation adverse rulings by government  agencies having  jurisdiction
over the Plant or the  institution of any litigation or proceeding or the threat
of any claim of the type described in Section 3.6.2(l).


                                       37


     Section 11.4  Performance  of Contracts.  Each Owner and the Operator shall
use its best efforts to perform all of the obligations  required of it under the
terms  of any  material  contract,  agreement  or  arrangement  entered  into in
connection  with the  operation of the Plant.  Each Owner shall notify the other
Owner and the  Operator  or the  Operator  shall  notify  the  Owners  Committee
promptly of any fact or circumstance  known to it which does or may constitute a
material default under, or which might  materially  adversely affect the ability
of the Owners or the Operator to carry out their  obligations under any contract
material to the operation of the Plant.

     Section 11.5 Organization,  Power and Authority. Each of the Owners and the
Operator shall remain a partnership,  corporation or limited liability  company,
as the case may be, duly organized,  validly existing and in good standing under
the laws of the jurisdiction in which it is organized,  and (if not organized in
the State of Kentucky) in good standing as a foreign partnership, corporation or
limited liability company, as the case may be, in the State of Kentucky. Each of
the Owners and the Operator shall maintain full corporate power and authority to
own, in the case of an Owner, its Interests and to perform its obligations under
this Agreement,  and shall promptly obtain any consent or approval of or license
or  permission  from any  governmental  authority  which may be required for the
performance of such obligations.

     Section  11.6  Easements.  Each  Owner  shall  grant  to  the  other  Owner
non-exclusive  rights of way and easements on, over,  through,  under and across
the real estate comprising a part of its Owner's Plant Assets and such rights of
access and use of such Owner's Plant Assets and the other assets  comprising its
Interest as may be necessary  for the operation by the other Owner of the assets
comprising  such other  Owner's  Interest.  The  Owner's  hereby  agree that the
Operator  shall  be  entitled  to the  free  use of all of  such  rights  in the
performance of its duties as Operator hereunder.  The rights and obligations set
forth in this  Section  11.6 and Section 11.7 shall be binding upon and inure to
the benefit of a transferee of all or a portion of an Owner's Interest.

     Section 11.7 Further  Assurances.  Each Owner,  including any transferee of
all or a portion of an Owner's Interest,  shall, upon the reasonable  request of
another  Owner or the  Operator,  and the Operator  shall,  upon the  reasonable
request of an Owner,  from time to time,  execute and deliver to the other Owner
or the  Operator all such  instruments  and  documents  of further  assurance or
otherwise,  and do all such acts and things,  as may  reasonably  be required to
carry  out such  Owner's  or the  Operator's  obligations  hereunder,  including
without  limitation the obligations set forth in Section 11.6, and to consummate
and complete this Agreement and the transactions contemplated hereby.


                                       38


                                  Article XII

                                 REPRESENTATIONS

     Section 12.1 Owners'  Representations.  Each of NSA and GAC  represents and
warrants to the other that as of the date of this Agreement:

          12.1.1  Organization,  Powers and  Authority.  It is a partnership  or
     limited  liability  company duly  organized,  validly  existing and in good
     standing under the laws of the  jurisdiction as indicated on the first page
     of this Agreement,  and has the corporate power to own its Interest. It has
     the corporate power to carry on its business now being conducted and it has
     full  corporate  power  and  authority  to  enter  into  and  perform  this
     Agreement.  It requires no consent or approval of or license or  permission
     from  any   governmental   authority  for  the  execution  or  delivery  or
     performance  by it of this  Agreement  which  has  not  been  obtained.  It
     requires no consent of any party to any  contract or  agreement to which it
     is a party or to which any of its  property  or assets is  subject  for the
     execution,  delivery  or  performance  of this  Agreement  other  than such
     consents which have been obtained. The execution,  delivery and performance
     of this  Agreement  by it have been duly  authorized  and  approved  by all
     requisite corporate action of it. This Agreement has been duly executed and
     delivered by it, and is valid and binding upon it.

          12.1.2 Compliance with Other Instruments. Neither it nor any Affiliate
     of it is in  violation  of or in  default  with  respect  to  any  term  or
     provision of any indenture,  contract,  agreement or instrument to which it
     is a party or by which it is bound, or of any judgment,  order or decree of
     any  court or to its  knowledge  of any  governmental  authority  or to its
     knowledge any statute,  rule or regulation  applicable to it or by which it
     is bound,  in any case and in any manner so as  presently  or at any future
     time to affect it adversely in any material  respect in connection with the
     ownership or operation of the Plant.

          12.1.3  Litigation.  Neither it nor any  Affiliate of it is a party to
     any action,  suit or  proceeding in which an adverse  determination  has or
     would have any  material  effect on its ability to perform its  obligations
     under this  Agreement  or would have any material  adverse  effect upon the
     ownership or operation of the Plant.

                                  Article XIII

                                  MISCELLANEOUS

     Section  13.1 Term.  The  obligations  of the Owners to provide  Alumina as
provided  in this  Agreement  shall  terminate  on the date on which  the  Plant
permanently  ceases  operating,  and this Agreement shall terminate and be of no
further  force and effect on the date on which any Owner  becomes the sole owner
of all of the  Interests,  provided  that neither  event shall relieve any party
from liability arising out of or in connection with ownership of its Interest.

     Section 13.2  Disposition  of Plant and Other Assets.  If Plant  operations
cease  permanently,  the Owners shall  confer to determine  whether any Owner is
willing  to  purchase  the  Interest  of the  other  Owner at a price  and under
conditions  acceptable  to the other Owner,  whether the Plant and any remaining
Jointly-Owned Property or Plant Assets are usable for another purpose acceptable
to the Owners, or whether the Plant and any remaining Jointly-Owned Property and
Plant Assets should be sold. If unanimous agreement of the Owners is not reached
within  three months of  cessation  of Plant  operations,  either Owner may seek
partition.


                                       39


     Section  13.3  Liability.  Each  Owner  hereby  acknowledges,   agrees  and
understands  that to the extent of its Interest it is and shall remain liable to
third parties for any loss, cost,  damages or liability of any nature whatsoever
arising out of the  ownership of an Interest and that any such  liability  shall
survive the termination of this Owners Agreement.

     Section  13.4  Notices.  All  notices,   demands  or  other  communications
(collectively, "notices") required or permitted to be given under this Agreement
shall be in writing, either delivered by hand to the other party at that party's
address set forth  below,  or sent by postage  prepaid  certified  mail  (return
receipt requested) or by telegraph or telephonic facsimile transmission,  to the
other party's address and facsimile  number (if applicable) set forth below, and
shall  be  effective  on the date the hand  delivery,  telegraph  or  telephonic
facsimile  transmission  is  received  by the  other  party or, in the case of a
notice by mail,  five (5) business days after deposit in the mail. A copy of the
text of any notice given by telegraph or telephonic facsimile transmission shall
be mailed by postage  prepaid  certified  mail (return  receipt  requested),  or
delivered  by hand,  to the  address set forth below  within a  reasonable  time
thereafter,  provided such  confirmation  shall not be required if the recipient
acknowledges receipt of the notice. Notices shall be sent:

     If to NSA or to an NSA Representative on the Owners Committee:

     NSA, Ltd.
     2511 Garden Road
     Building A, Suite 200
     Monterey, CA  93940
     Attention:  Gerald A. Meyers
     Facsimile No.:  (831) 642-9328

     with a copy to:

     Century Aluminum Company
     2511 Garden Road
     Building A, Suite 200
     Monterey, CA  93940
     Attention:  Gerald J. Kitchen
     Facsimile No.:  (831) 642-9328


                                       40


     If to GAC or to a GAC Representative on the Owners Committee:

     Glencore Acquisition I LLC
     c/o Glencore Ltd.
     301 Tresser Boulevard
     Stamford, Connecticut 06901-3244
     Attention:  Aluminum Department (or Representative's name, if applicable)
     Facsimile No. (203) 978-2600

     with a copy to:

     Glencore AG
     Baarermattstrasse 3
     P.O. Box 666
     CH-6341 Baar
     Switzerland
     Attention:  Aluminum Department
     Facsimile No.:  011-4141-709-2980.

     if to the Operator:

     Century Aluminum of Kentucky LLC
     1627 State Route 271 North
     Hawesville, KY 42348-0500
     Attention:  Plant Manager
     Facsimile No.:  (270) 927-9058.

     with a copy to:

     Century Aluminum Company
     2511 Garden Road
     Building A, Suite 200
     Monterey, CA  93940
     Attention:  Gerald J. Kitchen
     Facsimile No.:  (831) 642-9328

Any change in the address or facsimile  transmission  number of a party (or copy
recipient)  for the purposes of notice under this Section shall be  communicated
to the other  parties  in the  manner set forth in this  Section  for  providing
notice.

     Section 13.5 Entire  Agreement  and  Modification.  This  Agreement and the
agreements  contained  in  Exhibits  hereto  constitute  and  contain the entire
agreement  of  the  Owners  and  supersede  any  and  all  prior   negotiations,
correspondence, understandings and agreements between the parties respecting the
subject  matter  hereof.  This  Agreement  may  be  amended  only  by a  written
instrument signed by the Owners.


                                       41


     Section 13.6 Best Efforts and  Cooperation.  Each of the Owners shall exert
its best efforts to obtain all consents and approvals  necessary for its due and
punctual  performance of this Agreement and each shall  cooperate with the other
with respect thereto.

     Section 13.7 Force Majeure.  Except as specifically  provided  herein,  the
performance by the Owners or the Operator of their respective  obligations under
this Agreement  shall be suspended for such period of time as they are prevented
from  performing  such  obligations  by  reason  of acts of  God,  fire,  flood,
explosion,  insurrection, riot, enemy attack, strike or work stoppage, malicious
mischief,  orders of court or other governmental authority,  inability to secure
of delay in securing  governmental  consents or  authorizations,  rights of way,
privileges franchises,  permits,  equipment,  and other events reasonably beyond
the control of the party subject  thereto.  A force majeure shall not relieve an
Owner from the  monetary  obligations  under this  Agreement  incurred  during a
period of force  majeure.  Any force majeure shall be remedied with all possible
diligence  but such  requirement  shall not require the  settlement  of strikes,
lockout or other labor  difficulties by the party concerned on terms contrary to
its wishes.  How such difficulties shall be handled shall be entirely within the
discretion of the party concerned.

     Section 13.8 Binding Effect. This Agreement shall be binding upon and inure
to the  benefit of the  Owners and their  respective  successors  and  permitted
assigns.

     Section 13.9 Survival. All representations, warranties and indemnities made
herein or in any agreement,  certificate or other instrument  delivered pursuant
hereto by each Owner shall survive the termination of this Agreement.

     Section  13.10  Governing  Law.  This  Agreement  shall be  governed by and
construed in accordance  with the laws of the State of New York,  without giving
effect to the conflict of laws provisions thereof, except to the extent that the
terms hereof relate to the use of real property  constituting  Plant Assets,  in
which case such terms shall be governed by and construed in accordance  with the
laws of the State of Kentucky.

     Section 13.11 Disputes. Any controversy or claim arising out of or relating
to this  Agreement,  or any breach  thereof,  shall be  settled  by  arbitration
administered  by the  American  Arbitration  Association  under  its  Commercial
Arbitration  Rules, which shall take place in New York City, New York. The panel
of arbitrators shall consist of three  arbitrators.  Each party shall select one
arbitrator and the two selected arbitrators shall select a third to complete the
panel. The  determination  of the arbitrators  shall be final and binding on the
parties and judgment on the award rendered by the  arbitrator(s)  may be entered
in any court having jurisdiction thereof.

     Section  13.12  Captions.  The  captions to Articles  and  Sections of this
Agreement  are  for  convenience  and  are  to  be  ignored  in  construing  and
interpreting the provisions of this Agreement.


                                       42


     Section  13.13  Singular and Plural.  In this  Agreement  where the context
admits, the singular includes the plural and vice versa.

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

ATTEST:                                              NSA, LTD.


_______________________________                 By______________________________

                                                Title___________________________

STATE OF NEW YORK,
COUNTY OF NEW YORK, to-wit:

     The  foregoing  instrument  was  acknowledged  before me this  _____ day of
April, 2001, by  __________________________,  the  ________________________,  of
METALSCO LTD, a Georgia corporation, the General Partner of NSA, LTD, a Kentucky
limited partnership, on behalf of said limited partnership.

     My commission expires ________________________________.


                                                _______________________________
                                                         NOTARY PUBLIC

[SEAL]



ATTEST:                                            GLENCORE ACQUISITION I LLC


_______________________________                 By______________________________

                                                Title___________________________

STATE OF NEW YORK,
COUNTY OF NEW YORK, to-wit:

     The  foregoing  instrument  was  acknowledged  before me this  _____ day of
April, 2001, by ___________________________,  the _________________________,  of
GLENCORE  ACQUISITION I LLC, a Delaware limited liability company,  on behalf of
said company.

     My commission expires ________________________________.



                                                _______________________________
                                                         NOTARY PUBLIC

[SEAL]



ATTEST:                                             CENTURY ALUMINUM OF KENTUCKY


_______________________________                 By______________________________

                                                Title___________________________

STATE OF NEW YORK,
COUNTY OF NEW YORK, to-wit:

     The  foregoing  instrument  was  acknowledged  before me this  _____ day of
April, 2001, by ____________________________,  the ________________________,  of
CENTURY  ALUMINUM OF KENTUCKY  LLC, a Delaware  limited  liability  company,  on
behalf of said company.

     My commission expires ________________________________.


                                                _______________________________
                                                         NOTARY PUBLIC

[SEAL]

This instrument was prepared in
consultation with counsel in Kentucky
by, and when recorded return to:



__________________________________
David Bayrock, Esq.
Curtis, Mallet-Prevost, Colt & Mosle LLP
101 Park Avenue
New York,  NY   10178




                                LIST OF EXHIBITS


- -  Exhibit A           -  Specifications for Alumina

- -  Exhibit B-1         -  Guaranty of Century Aluminum Company for the benefit
                          of Glencore Acquisition I LLC

- -  Exhibit B-2         -  Guaranty  of Glencore AG for the benefit of NSA, Ltd.

- -  Exhibit B-3         -  Guaranty of Affiliate of Transferee

- -  Exhibit C           -  Description of Plant

- -  Exhibit D           -  Insurance Requirements