Document:

<PAGE>

                                                                   Exhibit 10.21

                                   APPENDIX 1

                            The Alliance Agreement
                               Establishing The
           Alliance Independent Transmission System Operator, Inc.,
                   Alliance Transmission Company, Inc., And
                      Alliance Transmission Company, LLC
                              Dated May 27, 1999
<PAGE>

                               TABLE OF CONTENTS

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

ARTICLE II
PURPOSE OF AGREEMENT.......................................................  1
    2.1    Purpose of this Agreement.......................................  1
           -------------------------
    2.2    Attachments and Appendices......................................  2
           --------------------------

ARTICLE III
INITIAL DETERMINATION OF FORM OF REGIONAL TRANSMISSION ORGANIZATION........  3
    3.1    Owner Declarations..............................................  3
           ------------------
    3.2    Evaluation of Transco Trigger Conditions........................  4
           ----------------------------------------
    3.3    Transmission Owner Post-Trigger Evaluation Rights...............  4
           -------------------------------------------------
    3.4    Transmission Owner Post-Trigger Failure Evaluation Rights.......  4
           ---------------------------------------------------------

ARTICLE IV
ALLIANCE PUBLICO...........................................................  4
    4.1    Formation of Alliance Publico...................................  4
           -----------------------------

ARTICLE V
ALLIANCE TRANSCO...........................................................  5
    5.1    Formation of Alliance Transco...................................  5
           -----------------------------
    5.2    LLC Agreement...................................................  6
           -------------
    5.3    Alliance Transco Operations.....................................  6
           ---------------------------

ARTICLE VI
ALLIANCE ISO...............................................................  6
    6.1    Formation of the Alliance ISO...................................  6
           -----------------------------
    6.2    Alliance ISO Operations.........................................  7
           -----------------------

ARTICLE VII
ALLIANCE RTO START UP AND TRANSITION PERIODS...............................  8
    7.1    Start-up Period and Initial Funding.............................  8
           -----------------------------------
    7.2    Reimbursement of Start-Up Expenditures..........................  8
           --------------------------------------
    7.3    Location for Alliance RTO Operations............................  8
           ------------------------------------
    7.4    Transition from Alliance ISO to Alliance Transco................  8
           ------------------------------------------------
    7.5    Alliance RTO Transition and Operating Conditions................  9
           ------------------------------------------------
    7.6    Regional Power Exchange.........................................  9
           -----------------------
</TABLE>
<PAGE>

<TABLE>
<S>                                                                         <C>
ARTICLE VIII
NEW PARTICIPANTS..........................................................   9
    8.1    Admission of New Participants..................................   9
           -----------------------------

ARTICLE IX
TERMINATION OF PARTICIPATION IN ALLIANCE..................................  10

ARTICLE X
SHARING OF EXPENSES.......................................................  10

ARTICLE XI
REGULATORY AND TAX AUTHORIZATIONS.........................................  10
    11.1   Regulatory Approvals...........................................  10
           --------------------
    11.2   Tax Approvals..................................................  11
           -------------

ARTICLE XII
NON-SEVERABILITY OF AGREEMENT.............................................  11

ARTICLE XIII
MISCELLANEOUS PROVISIONS..................................................  11
    13.1   Descriptive Headings: Appendices and Exhibits..................  11
           ---------------------------------------------
    13.2   Governing Law..................................................  12
           -------------
    13.3   Counterparts...................................................  12
           ------------
    13.4   Successors and Assigns.........................................  12
           ----------------------
    13.5   No Implied Waivers.............................................  12
           ------------------
    13.6   Representations and Warranties.................................  12
           ------------------------------
    13.7   Further Assurances.............................................  13
           ------------------
    13.8   Delivery of Notices............................................  13
           -------------------
    13.9   Limitations on Liability.......................................  13
           ------------------------
    13.10  Entire Agreement...............................................  13
           ----------------
    13.11  Good Faith Efforts.............................................  13
           ------------------
    13.12  Third Party Agreements.........................................  14
           ----------------------
    13.13  No Partnership.................................................  14
           --------------
    13.14  Dispute Resolution.............................................  14
           ------------------
    13.15  Transmission Owner Participation Agreement.....................  14
           ------------------------------------------
    13.16  Transmission Owner Consent.....................................  14
           --------------------------
    13.17  Effective Date and Termination.................................  14
           ------------------------------
    13.18  Amendments.....................................................  15
           ----------
</TABLE>
<PAGE>

                                                                      Appendix 1

                            THE ALLIANCE AGREEMENT

     This Alliance Agreement (the "Alliance Agreement" or this "Agreement") is
made and entered into as of May 27, 1999, by and among the undersigned
Transmission Owners in order to set forth their agreements with respect to the
creation of a regional transmission organization, on the terms and subject to
the conditions stated herein.

     The Transmission Owners intend to seek governmental approvals for the
creation of a Regional Transmission Organization ("RTO").  The Alliance RTO will
be either a Transco, referred to herein as the Alliance Transmission Company,
LLC ("Alliance Transco"), or an ISO, referred to herein as the Alliance
Independent Transmission System Operator, Inc. (the "Alliance ISO").  In the
former event, Alliance Transco will be owned in part and managed solely by a
newly-created public company, Alliance Transmission Company, Inc. ("Alliance
Publico").

     The Transmission Owners believe that formation and approval of the Alliance
RTO will further the goal of a more competitive electric market in the North
American Eastern Interconnection.

     The Transmission Owners are willing to proceed with the approval and
formation of the Alliance Transco and Alliance ISO subject to the terms and
conditions described herein, including the unilateral right to withdraw from
this endeavor at any time on the terms provided herein.

     THEREFORE, the undersigned parties agree as follows:

                                   ARTICLE I
                                  DEFINITIONS

     Capitalized terms used in this Agreement without other definition shall
have the meanings specified in Exhibit A.

                                  ARTICLE II
                             PURPOSE OF AGREEMENT

      2.1 Purpose of this Agreement.
          -------------------------

          2.1.1  The purpose of this Agreement is to create an independent
          Regional Transmission Organization.  The Alliance RTO will be either a
          Transco or an ISO that will perform system operator functions.  The
          form of the Alliance RTO will be determined by the Transmission Owners
          in accordance with Article III of this Agreement.  Through an
          Operation Agreement with the Alliance RTO, the Alliance RTO will have
          Functional Control over  certain transmission facilities owned by the
          Transmission Owners for the following purposes:
<PAGE>

               (a) independent operation of the transmission facilities;

               (b) non-discriminatory open access transmission service over the
               Transmission System to eligible customers pursuant to the OATT;

               (c) collection and distribution of transmission revenues from
               Transmission Users in accordance with the Pricing Protocol; and

               (d) management of regional reliability and system security
               consistent with the provisions of the Operating Protocol and the
               Planning Protocol.

          2.1.2  The purpose of this Agreement is also to describe a mechanism
          for the start up of, or transition to, an independent, for-profit
          transmission company referred to herein as Alliance Transco.  This
          Agreement describes the conditions which must be satisfied before
          Alliance Transco is formed.  These conditions, referred to herein as
          the "Transco Trigger Conditions," may be satisfied either before or
          after the beginning of Alliance ISO operations.  If such conditions
          are met before the Transmission Service Date, the Transmission Owners
          will proceed directly to the Alliance Transco structure.  If the
          conditions are satisfied after the Transmission Service Date, the
          Transmission Owners will undertake a transition to the Alliance
          Transco structure in accordance with the terms of Article VII of this
          Agreement.

          2.1.3  This Agreement also describes how Alliance Transco will be
          managed independently from Transmission Users, including Transmission
          Owners that will be Transmission Users.  Alliance Transco will be
          controlled by a newly-organized public company -- Alliance Publico.
          Alliance Publico will be the managing member of Alliance Transco and
          will have authority to manage the business and affairs of Alliance
          Transco.  Alliance Publico will be a corporation so that it can raise
          capital in the public financial markets through an initial public
          offering.  The public ownership of Alliance Publico is also intended
          to provide Alliance Transco with management which is independent from
          the Transmission Users.

     2.2     Attachments and Appendices. The following attachments and
             --------------------------
appendices are incorporated herein and made a part of this Agreement:

Appendix 2:  Term Sheet for Alliance Transmission Company, Inc.

Appendix 3:  Term Sheet for Alliance Transmission Company, LLC

Appendix 4:  Bylaws for Governance of the Alliance Independent Transmission
             System Operator Inc., a Delaware non-stock corporation

Appendix 5:  Alliance Regional Transmission Organization Operating Protocol

                                       2
<PAGE>

Appendix 6:  Alliance Regional Transmission Organization Planning Protocol

Appendix 7:  Alliance Regional Transmission Organization Protocol for
             Transmission Service Pricing, Discounting, Revenue Distribution,
             and Grandfathered Contracts

Appendix 8:  Alliance Regional Transmission Organization Operation Agreement

Appendix 9:  Alliance Regional Transmission Organization Agency Agreement

                                  ARTICLE III
                   INITIAL DETERMINATION OF FORM OF REGIONAL
                           TRANSMISSION ORGANIZATION

     3.1  Owner Declarations.  After the Required Regulatory Approvals have been
          ------------------
obtained, the Transmission Owners shall take the following actions to determine
whether the initial form of the Regional Transmission Organization will be the
Alliance Transco or Alliance ISO:

     (i)    each Transmission Owner shall make an Owner Declaration as to
     whether such Transmission Owner intends to maintain ownership of its
     transmission facilities and transfer operational control to the Alliance
     RTO or to divest its transmission facilities to the Alliance RTO and the
     Owner Declaration shall be made in the form of a certificate from the Chief
     Executive Officer or President of the Transmission Owner which sets forth
     the information and plans required in this Agreement;

     (ii)   if the Owner Declaration indicates that the Transmission Owner
     wishes to maintain ownership of some or all of its transmission facilities,
     such declaration shall include (A) a commitment on the part of such
     Transmission Owner to enter into an Operation Agreement with the Alliance
     RTO, (B) a detailed description of any remaining regulatory or other
     consents required to complete the transfer to Alliance RTO control and any
     known legal impediments to obtaining such consents, and (C) a detailed
     description of the transmission facilities to be subject to the Operation
     Agreement;

     (iii)  if the Owner Declaration indicates that the Transmission Owner
     wishes to divest ownership of some or all of its transmission facilities to
     the Alliance RTO, such declaration shall include (A) a detailed description
     of any remaining regulatory or other consents required to complete the
     divestiture and any known legal impediments to obtaining such consents, (B)
     a detailed description of the transmission facilities to be divested, (C) a
     statement as to whether such Transmission Owner wishes to sell such
     transmission facilities to Alliance Transco and/or contribute such
     facilities to Alliance Transco in exchange for membership interests in
     Alliance Transco, (D) an acknowledgment that neither the Transmission Owner
     nor Alliance Transco will be legally bound to consummate the divestiture
     until such time as such parties have negotiated, executed and delivered
     mutually

                                       3
<PAGE>

     acceptable definitive agreements with respect to such divestiture setting
     forth the material terms and conditions of such a transaction, and (E) a
     comprehensive proposal regarding the material terms, conditions, and
     provisions of the Alliance Transco LLC Agreement and other documents
     necessary to create the Alliance Transco and carry out the divestiture in
     conformance with the Transco and Publico Term Sheets, which proposal shall
     serve as the foundation for such negotiations to develop definitive
     agreements; and

     (iv) each Transmission Owner agrees to provide the other Transmission
     Owners with an Owner Declaration within 90 days after the Required
     Regulatory Approvals have been obtained.

     3.2  Evaluation of Transco Trigger Conditions.  Upon receipt of the Owner
          ----------------------------------------
Declarations, the Transmission Owners will determine whether the Transco Trigger
Conditions have been satisfied.  Following such determination, the Alliance RTO
will implement the transition and transfer of either, or both, asset ownership
and operational control of transmission facilities from each Transmission Owner
to the appropriate RTO structure as provided in this Agreement.

     3.3  Transmission Owner Post-Trigger Evaluation Rights.  Non-Divesting
          -------------------------------------------------
Transmission Owner(s), after the Transco Trigger Conditions have been satisfied,
shall have the right to seek to terminate their participation in the Alliance
Agreement in accordance with the provisions in Article IX.

     3.4  Transmission Owner Post-Trigger Failure Evaluation Rights.  If the
          ---------------------------------------------------------
Transco Trigger Conditions are not satisfied, Transmission Owner(s) shall have
the right to seek to terminate their participation in the Alliance Agreement in
accordance with the provisions in Article IX.

                                   ARTICLE IV
                                ALLIANCE PUBLICO

     4.1  Formation of Alliance Publico.
          -----------------------------

          4.1.1   If, at the completion of the process set forth in Article III,
          the Transco Trigger Conditions have been satisfied, the Transmission
          Owners shall organize Alliance Publico as a for-profit, Delaware
          corporation. Alliance Publico will be formed as a public utility
          holding company and will own membership interests in Alliance Transco.

          4.1.2   In order to facilitate the commencement of operations by
          Alliance Transco, Alliance Publico will seek to raise capital through
          an initial public offering of its capital stock and such other public
          or private debt financing transactions (with persons independent of
          the Transmission Owners) as deemed appropriate.  The goal of Alliance
          Publico's financing activities will be to:

                                       4
<PAGE>

8.   Executive and Administrative.  Advise and assist in the solution of major
     ----------------------------
problems and in the formulation and execution of general plans and policies.
Advise and assist as to operations, the issuance of securities, the preparation
of filings arising out of or required by the various Federal and State
securities, business, public utilities and corporation laws. The selection of
executive and administrative personnel, representation before regulatory bodies,
proposals for capital expenditures, budgets, financings, acquisition and
disposition of properties, expansion of business, rate structures, public
relationships and other related matters.

9.   Business and Operations Services. Advise and assist in all matters relating
     --------------------------------
to operational capacity and the preparation and coordination of operating
studies. Provide assistance with management of the purchase, sale, movement,
transfer and accounting of volumes to ensure continued recovery of all prudently
incurred energy purchase costs through local jurisdictional cost recovery
mechanisms. Compile and communicate information relevant to operations. Perform
general business and operations support services, including travel services,
fleet, mail, plant and facilities operation, maintenance and management.

10.  Exploration and Development.  Advise and assist in geological and
     ---------------------------
exploration matters including the acquisition and surrender of acreage and the
development of underground storage facilities.

11.  Risk Management.  Risk management services such as the securing of
     ---------------
requisite insurance, the purchase and administration of property, casualty and
marine insurance, the settlement of insured claims and the provision of risk
prevention advice.

12.  Marketing.  Assist in the planning, formulation and implementation of
     ---------
marketing programs, as well as provide associated marketing services to assist
with improving customer satisfaction, load retention and shaping, growth of
energy sales and deliveries, energy conservation and efficiency.  Assist in
carrying out policies and programs for the development of plant locations and of
industrial, commercial and wholesale markets and assist with community
redevelopment and rehabilitation programs.

13.  Budgeting and Planning.  Advise and assist in studying and planning in
     ----------------------
connection with operations, budgets, economic forecasts, rate structures,
capital expenditures and special projects.

14.  Purchasing.  Advise and assist in the purchase of materials, supplies and
     ----------
services and the preparation and negotiation of purchasing agreements.

15.  Rates.  Advise and assist in the analysis of rate structures, the
     -----
formulation of rate policies and the negotiation of large contracts.  Provide
consulting in connection with proceedings before regulatory bodies involving
rates and operations.

16.  Research.  Investigate and conduct research into problems relating to
     --------
production utilization, testing, manufacture, transmission, storage and
distribution of energy.  Evaluate and

                                       5
<PAGE>

conduct research and development in promising areas and advise and assist in the
solution of technical problems arising out of operations.

17.  Tax.  Advise and assist in the preparation of separate and consolidated tax
     ---
returns (Federal and State), interpretations of tax laws, administration of tax
audits, payment of taxes and related matters.

18.  Environmental Compliance.  Provide consulting and related services to
     ------------------------
ensure full compliance with applicable environmental statutes and regulations.

19.  Customer Service.  Provision of services and systems dedicated to customer
     ----------------
service, including billing, remittance, credit, collections, customer relations,
call centers, energy conservation support and metering.

20.  Energy Marketing.  Provide services and systems dedicated to energy
     ----------------
marketing, including marketing and trading of gas and electric power, energy
price risk management, and development of marketing and sales programs in
physical and financial markets.

21.  Treasury/Finance.  Provide services related to managing all administrative
     ----------------
activities associated with financing, including management of capital structure;
cash, credit and risk management activities; investment and commercial banking
relationships; oversight of decommissioning trust funds and general financing
activities.

22.  Office Space and Equipment.  Leasing of land, buildings, furnishings
     --------------------------
and equipment, including computer hardware and software and transportation
equipment.

23.  External Affairs.  Provide services in support of corporate strategies for
     ----------------
managing relationships with federal, state and local governments, agencies and
legislative bodies.  Formulate and assist with public relations and
communications programs and administration of corporate contribution and
community affairs programs.

                                       6
<PAGE>

          The Alliance ISO intends to file an application with the Internal
          Revenue Service for recognition of exemption from federal taxation
          pursuant to Section 501 of the Code. No part of the net earnings, if
          any, of the Alliance ISO shall inure to the benefit of any
          Transmission Owner or other ISO Member, or any director, officer,
          employee, or other affiliate of any Transmission Owner, ISO Member or
          the Alliance ISO itself. The Alliance ISO will be authorized to pay
          reasonable compensation for services rendered and to make payments or
          distributions in furtherance of the purposes and objectives set forth
          in this Agreement and the OATT. No substantial part of the activities
          of the Alliance ISO shall be in attempting to influence legislation in
          any jurisdiction. The Alliance ISO shall not participate in or
          intervene in any political campaign on behalf of any candidate for
          public office.

          6.1.3  Notwithstanding any other provision of this Agreement, if the
          Internal Revenue Service determines that the Alliance ISO qualifies as
          a tax-exempt corporation under Section 501 of the Code, the Alliance
          ISO shall not conduct or carry on any activities not permitted to be
          conducted or carried on by an organization exempt from taxation under
          such provision of the Code.  If the Alliance ISO does not qualify for
          such tax exemption, the Alliance ISO shall, consistent with its other
          obligations under this Agreement, take such actions as are reasonably
          necessary to minimize its federal and state tax obligations.

     6.2  Alliance ISO Operations.
          -----------------------

          6.2.1  Upon formation of the Alliance ISO, each Transmission Owner
          shall execute an Operation Agreement with the Alliance ISO
          substantially in the form of Appendix 8 and an Agency Agreement
          substantially in the form of Appendix 9.  Legal and equitable title to
          the respective properties comprising the transmission facilities,
          including all real property rights and rights to additional
          transmission facilities built or acquired by the Transmission Owner,
          shall remain with each respective Transmission Owner.  The respective
          Transmission Owners shall retain all rights incident to such legal and
          equitable title, including, but not limited to, the right, subject to
          applicable federal or state regulatory approvals, to build, acquire,
          sell, dispose of, use as security, convey any part of their property,
          or use such property for purposes other than providing transmission
          services (such as the use of such property for telecommunications or
          natural gas transportation purposes), provided that the exercise of
          any such rights shall not impair the reliability of such transmission
          facilities.

          6.2.2  The operation of the Alliance ISO shall be governed in
          accordance with the ISO Bylaws, as amended from time to time.  The ISO
          Bylaws are located in Appendix 4.

                                       7
<PAGE>

                                  ARTICLE VII
                 ALLIANCE RTO START UP AND TRANSITION PERIODS

     7.1  Start-up Period and Initial Funding.  The Transmission Owners may
          -----------------------------------
select and employ persons or entities to perform such administrative and start-
up functions, and may provide by contribution, loan or otherwise for sufficient
capital to finance such functions, as in their judgment may be necessary or
desirable in respect of the Alliance RTO.

     7.2  Reimbursement of Start-Up Expenditures.  Each Transmission Owner may
          --------------------------------------
submit to the Alliance RTO requests for reimbursement of all reasonable and
proper sums expended by such Transmission Owner in connection with the formation
and seeking of governmental approvals in connection with the Alliance RTO.  The
Alliance RTO shall be required to make such reimbursements with interest as
computed in accordance with 18 C.F.R. (S) 35.19(a) from and after the date of
submission of reimbursement requests by a Transmission Owner, which shall not be
before the Transmission Service Date.

     7.3  Location for Alliance RTO Operations.  The Alliance RTO shall promptly
          -------------------------------------
choose the location for Alliance RTO operations.  The Alliance RTO shall review
and give consideration to the report of any independent consultant hired by the
Transmission Owners, by the Alliance RTO or by any stakeholder to identify
and/or evaluate locations for Alliance RTO operations.

     7.4  Transition from Alliance ISO to Alliance Transco.
          ------------------------------------------------

          7.4.1  At any time, any Transmission Owner may initiate an evaluation
          of the Transco Trigger Conditions for the purpose of determining
          whether to begin a transition to the Alliance Transco structure.  Such
          initiation of the trigger evaluation by the Transmission Owner shall
          be in the form of a formal notice to the Transmission Owners and the
          Alliance RTO Board of Directors.  Upon receipt of such notice, each
          Transmission Owner will make an Owner Declaration as described in
          Article III hereof within 90 days of such request.  The objective of
          this evaluation process will be to determine whether there is
          sufficient interest among the Transmission Owners to begin the
          transition from the Alliance ISO to the Alliance Transco structure.

          7.4.2  In the event that the Transco Trigger Conditions are satisfied
          in response to an inquiry made under Section 7.4.1 hereof, the
          Transmission Owners will begin the transition to the Alliance Transco
          structure described in Articles IV and V of this Agreement.  When the
          Alliance Transco becomes operational as an owner and operator of the
          transmission facilities, the Alliance ISO shall be dissolved and its
          affairs wound up.

                                       8
<PAGE>

          7.4.3  In the event that an inquiry is made pursuant to Section 7.4.1
          hereof and the Transco Trigger Conditions are not satisfied, the
          structure of the Alliance RTO shall continue as the Alliance ISO,
          described in Article VI of this Agreement.

     7.5  Alliance RTO Transition and Operating Conditions.
          ------------------------------------------------

          7.5.1  The Alliance RTO, whether in the form of the Alliance ISO or
          Alliance Transco, shall be operated in accordance with the Operating
          Protocol, Planning Protocol, and Pricing Protocol as such may be
          amended from time to time.

          7.5.2  The Alliance RTO shall not accept the transfer of operational
          Transmission System control until after a satisfactory three-month
          demonstration of simulated operational capability as described in the
          Operating Protocol.  This simulated operation shall be conducted in
          order to demonstrate to the satisfaction of the Transmission Owners
          all aspects of the system operation.

     7.6  Regional Power Exchange.  The Transmission Owners agree that it is an
          -----------------------
objective of the Alliance RTO to cooperate with other entities to facilitate the
development of one or more Regional Power Exchanges as may be proposed by market
participants.

                                 ARTICLE VIII
                               NEW PARTICIPANTS

     8.1  Admission of New Participants.  The Transmission Owners agree that
          -----------------------------
additional parties may be added to this Agreement after the original date of its
execution.  Such additional parties must meet minimum qualification criteria as
follows:

    (i)   the entity must have filed with FERC and have in effect an open access
          transmission tariff or a tariff which FERC has found to be an
          "acceptable reciprocity tariff" under Order No. 888-A;

    (ii)  the entity must own or control transmission facilities which are
          physically interconnected with the transmission facilities of one or
          more of the Transmission Owners; and

    (iii) if the Alliance RTO has commenced operations, the entity must agree
          to execute an Operation Agreement, unless the entity chooses to become
          a Divesting Transmission Owner.

Upon notification of a prospective new participant in this Agreement, the
Transmission Owners will promptly meet to formally accept or decline admission.
A simple majority of the Transmission Owners is necessary for acceptance of a
new party to this Agreement.  Upon execution of this

                                       9
<PAGE>

Agreement by the new party, such participant will be obligated to tender its
share of any payments due hereunder which payment obligations were incurred on
and after November 11, 1998. The Transmission Owners may waive the requirement
set forth in clause (ii) above if allowing the additional party to join in this
Agreement will result in material benefits to the Alliance RTO. Following
commencement of operations of the Alliance Transco, the admission of new
Transmission Owners shall be subject to the terms of the governing documents of
such entity.

                                  ARTICLE IX
                   TERMINATION OF PARTICIPATION IN ALLIANCE

     The Transmission Owners agree that, prior to the election of the Board of
Directors of Alliance Publico or the Alliance ISO, as applicable, any party
hereto may unilaterally and in its sole discretion withdraw from this Agreement.
Such withdrawal must be effected by written notice to each of the other parties
hereto 30 days prior to the effectiveness of such withdrawal. Before said
withdrawal is effective the party seeking to withdraw must tender its share of
any payments due under this Agreement.  Upon withdrawal, the withdrawing party
will forfeit its right to receive any reimbursements or other payments otherwise
due under this Agreement from the Alliance RTO. Following the election of the
Board of Directors of the Alliance Publico or Alliance ISO, the withdrawal of
Transmission Owners will be subject to the terms of the governing documents of
such entity.

                                   ARTICLE X
                              SHARING OF EXPENSES

     The Transmission Owners agree to share on an equal basis all reasonable
costs incurred for carrying out the terms of this Agreement and to bear
currently their own expenses subject to reimbursement pursuant to Section 7.2
for internal work undertaken to that end; provided, however, that the
Transmission Owners shall not bear any expenses of the Alliance RTO that are
incurred after the election of the Board of Directors of Alliance Publico or the
Alliance ISO as applicable. Procedures for cost contributions will be developed
by separate understandings of the Transmission Owners.

                                  ARTICLE XI
                       REGULATORY AND TAX AUTHORIZATIONS

     11.1    Regulatory Approvals.  It is intended that execution of this
             --------------------
Agreement by the Transmission Owners will not be subject to any prior Required
Regulatory Approvals either at the federal or the state level.  The Transmission
Owners recognize, however, that implementation of the terms of the appendices
hereto and the OATT may be subject to acceptance or approval by the FERC and
possibly other federal and state authorities.  In the event that the Required
Regulatory Approvals

                                       10
<PAGE>

                                                                      Appendix 1

are deemed to be obtained as provided in this Agreement but a regulatory
authority disapproves, or refuses to approve the exhibits or appendices hereto
in whole or in part, or the OATT or any filing associated therewith, or imposes
any condition upon, or change to, this Agreement or its exhibits or appendices
adverse to any Transmission Owner, in the sole judgment of such Transmission
Owner, then (i) such Transmission Owner will negotiate in good faith with the
other Transmission Owners and/or such regulatory authority in an attempt to
resolve such disagreements, and (ii) if such parties are not able to reach
agreement in respect of the matters deemed adverse to such Transmission Owner
during such period, including any extension thereof consented to by such
Transmission Owner, such Transmission Owner shall give written notice to the
other Transmission Owners and this Agreement will be deemed to have terminated
with respect to the notifying Transmission Owner. Following such a termination,
the other Transmission Owners will expeditiously attempt in good faith to
negotiate a new agreement in respect of the Alliance RTO among themselves. A
Transmission Owner may be adversely affected within the meaning of this Section
11.1 even if the regulatory authority in question lacks jurisdiction over such
signatory.

      11.2   Tax Approvals.  If the Internal Revenue Service or any other
             -------------
federal or state taxing authority issues any ruling or imposes any requirement
or obligation, in connection with this Agreement adverse to any Transmission
Owner, in the sole judgment of such Transmission Owner, then this Agreement
shall be deemed to have terminated with respect to such Transmission Owner over
which such tax authority has jurisdiction. In that event, the adversely affected
Transmission Owner shall promptly give notice of such termination to the other
parties, and the remaining parties shall expeditiously attempt in good faith to
negotiate a substitute agreement.

                                  ARTICLE XII
                         NON-SEVERABILITY OF AGREEMENT

     This Agreement is entire of itself. The Transmission Owners do not agree to
be bound by some parts hereof and not others. Therefore, no contractual
authorization exists for the parties to go forward with one portion of this
Agreement or one Appendix hereto while not following the remaining terms of this
Agreement.

                                 ARTICLE XIII
                           MISCELLANEOUS PROVISIONS

      13.1   Descriptive Headings: Appendices and Exhibits.  The descriptive
             ---------------------------------------------
headings of Articles and other provisions of this Agreement have been inserted
for convenience of reference only and will not define, modify, restrict,
construe or otherwise affect the construction or interpretation of any of the
provisions of this Agreement. In the event of a conflict between this Agreement
and any Appendix or Exhibit hereto, the Appendix or Exhibit shall prevail as the
intent of the parties hereto. In the event of a conflict between this Agreement,
including any Appendices or Exhibit, and the OATT, the OATT shall prevail as to
the intent of the parties hereto.

                                       11
<PAGE>

      13.2   Governing Law.  This Agreement will be interpreted, construed and
             -------------
governed by the laws of the State of Delaware, except to the extent preempted by
the laws of the United States of America.

      13.3   Counterparts.  This Agreement may be executed in any number of
             ------------
counterparts, each of which shall be deemed to be an original, but all of which
together will constitute one and the same instrument.

      13.4   Successors and Assigns.  This Agreement shall inure to the benefit
             ----------------------
of, and be binding upon, the Transmission Owners, their respective successors
and assigns permitted hereunder, but shall not be assignable by any of the
Transmission Owners (except by assignment to a wholly-owned affiliate of a
Transmission Owner) by operation of law or otherwise, without the approval of
the remaining  parties, which approval shall not be unreasonably withheld.  A
Transmission Owner may not assign an obligation under this Agreement to an
assignee that is not capable of fulfilling the assigned obligation.  If a
Transmission Owner assigns this Agreement to an affiliated or unaffiliated
entity that is a successor-in-interest to the assigning Transmission Owner's
Transferred Facilities but not to its Non-transferred Transmission Facilities,
the assigning Transmission Owner must assign the obligation to execute an Agency
Agreement contained in Section 5.3 and Section 6.2.1 to the owner of the Non-
transferred Transmission Facilities.

      13.5   No Implied Waivers.  The failure of a Transmission Owner to insist
             ------------------
upon or enforce strict performance of any of the specific provisions of this
Agreement at any time will not be construed as a waiver or relinquishment to any
extent of such Transmission Owner's right to assert or rely upon any such
provisions, rights or remedies in that or any other instance, or as a waiver to
any extent of any specific provision of this Agreement.

      13.6   Representations and Warranties.  Each Transmission Owner represents
             ------------------------------
and warrants to the other parties that, as of the date it executes this
Agreement:

      (i)    The Transmission Owner is duly organized, validly existing and in
      good standing under the laws of the jurisdiction in which it is
      incorporated.

      (ii)    Subject to any necessary approvals by federal and state regulatory
      authorities, the Transmission Owner's participation in this Agreement, the
      execution and delivery by the Transmission Owner of this Agreement and the
      performance of its obligations hereunder have been duly and validly
      authorized by all requisite action on the part of the Transmission Owner
      and do not conflict with any applicable law. This Agreement has been duly
      executed and delivered by the Transmission Owner and this Agreement
      constitutes the legal, valid and binding obligation on the part of the
      Transmission Owner enforceable against it in accordance with its terms
      except insofar as the enforceability thereof may be limited by applicable
      bankruptcy, insolvency, reorganization, fraudulent conveyance, moratorium
      or other similar laws affecting the enforcement of creditor's rights
      generally, and by general

                                       12
<PAGE>

     principles of equity regardless of whether such principles are considered
     in a proceeding at law or in equity.

     (iii)   There are no actions at law, suits in equity, proceedings or claims
     pending or, to the knowledge of the Transmission Owner, threatened against
     the Transmission Owner before or by any federal, state, foreign or local
     court, tribunal or governmental agency or authority that might materially
     delay, prevent or hinder the performance by the Transmission Owner of its
     obligations hereunder.

      13.7   Further Assurances.  Each Transmission Owner agrees that it shall
             ------------------
hereafter execute and deliver such further instruments, provide all information
and take or forbear such further acts and things as may be reasonably required
or useful to carry out the intent and purpose of this Agreement and as are not
inconsistent with the provisions of this Agreement.

      13.8   Delivery of Notices.  Notices required under this Agreement shall
             -------------------
be in writing and shall be sent to a Transmission Owner by U.S. mail, overnight
courier, hand delivery, facsimile or other reliable electronic means.  Any
notice required under this Agreement shall be deemed to have been given either
upon delivery, if by U.S. mail, overnight courier or hand delivery, or upon
confirmation, if given by telecopier or other reliable electronic means to the
respective Secretary of each of the Transmission Owners at the principal place
of business of such Transmission Owner.

      13.9   Limitations on Liability.  No signatory Transmission Owner shall be
             ------------------------
liable to any other signatory Transmission Owner for any claim for indirect,
incidental, special, consequential, or exemplary damages, including, but not
limited to, the loss of profits or revenues, cost of financing, loss of goodwill
and cost of replacement power arising from such Transmission Owner's carrying
out, or failing to carry out, any obligations contemplated by this Agreement.

      13.10  Entire Agreement.  This Agreement, including any Appendix or
             ----------------
Exhibit to this Agreement, constitute the entire agreement among the
Transmission Owners with respect to the subject matter of this Agreement, and no
previous or contemporary oral or written representations, agreements, or
understandings made by any officer, agent, or employee of any Transmission Owner
shall be binding unless contained in this Agreement, including the Appendices
and Exhibit attached hereto.

      13.11  Good Faith Efforts.  Each Transmission Owner agrees that it shall
             ------------------
in good faith take all reasonable actions necessary to permit such Transmission
Owner to fulfill its obligations under this Agreement.  Where the consent,
agreement or approval of any Transmission Owner must be obtained hereunder, such
consent, agreement or approval shall not be unreasonably withheld, conditioned
or delayed.  To the extent that the jurisdiction of any federal or state
regulatory authority applies to any part of this Agreement and/or the
transactions or actions covered by this Agreement, each Transmission Owner will
cooperate with all other parties to secure any necessary or desirable approval
or acceptance of such regulatory authorities of such part of this Agreement
and/or such transactions or actions.  Each Transmission Owner shall notify the
other Transmission Owners of

                                       13
<PAGE>

any delay in its ability to fulfill its obligations under this Agreement or any
inability to fulfill its obligations under this Agreement.

      13.12  Third Party Agreements.  This Agreement shall not be construed,
             ----------------------
interpreted or applied in such a manner as to cause any Transmission Owner to be
in material breach, anticipatory or otherwise, of any agreement (in effect on
the later of the effective date of this Agreement or the date that it becomes a
Transmission Owner under this Agreement) between such Transmission Owner and one
or more third parties who are not parties under this Agreement (regardless of
the inclusion of one or more other parties as parties to such agreement) for the
joint ownership, operation or maintenance of any electrical facilities affected
by this Agreement.

      13.13  No Partnership.  This Agreement is not intended, and shall not be
             --------------
construed, interpreted or applied, to create a partnership or joint venture, and
no Transmission Owner shall be entitled to act as an agent for any other
Transmission Owner with respect to the Alliance RTO.

      13.14  Dispute Resolution.  If any dispute arises among any of the
             ------------------
Transmission Owners regarding the terms of this Agreement, it will be resolved
in accordance with these provisions.  First the Transmission Owners should
attempt to resolve any said dispute in the normal course of business.  If such
efforts are not successful, one or more of the Transmission Owners shall give
written notice to the other Transmission Owners of the dispute and its need for
resolution.  Within thirty days of receiving such a notice the Chief Executive
Officer of each of the Transmission Owners shall appoint an officer of his
company to serve as company representative on a negotiation panel.  Said panel
shall promptly convene and negotiate in good faith a resolution of the dispute.
If the dispute has not been resolved within sixty days after the panel is
convened, each of the Transmission Owners may avail themselves of any process or
means legally available to them to resolve the dispute.

      13.15  Transmission Owner Participation Agreement.  This Agreement
             ------------------------------------------
supersedes the Alliance process "Phase III Participation Agreement," effective
November 30, 1998, which was signed by some of the Transmission Owners to
develop this Agreement and filings for the FERC and other governmental agencies.

      13.16  Transmission Owner Consent.  Whenever a provision in this Agreement
             --------------------------
calls for the consent or approval of, or another determination by, a majority of
the Transmission Owners or some other percentage of the Transmission Owners
which is less that all of the Transmission Owners, such consent, approval or
determination shall be made among the Transmission Owners based on each
Transmission Owner having one vote without regard to the value of their
respective transmission facilities or any other such factor.

      13.17  Effective Date and Termination.  This Agreement shall be deemed to
             ------------------------------
be effective as of the date of its execution and delivery among the initial
signatories hereto.  This Agreement will terminate at such time as the Alliance
Transco commences operation or on such earlier date as provided in Article IX or
Article XI or as agreed among each of the Transmission Owners.

                                       14
<PAGE>

      13.18  Amendments.  Any amendments shall require unanimous consent of the
             ----------
Transmission Owners, which consent shall not be unreasonably withheld.

                                       15
<PAGE>

                   Signature Page to the Alliance Agreement
                               establishing the
           Alliance Independent Transmission System Operator, Inc.,
                    Alliance Transmission Company, Inc. and
                      Alliance Transmission Company, LLC
                      ----------------------------------

                         American  Electric Power Service Corporation
                              on Behalf of:

                              Applachian Power Company
                              Columbus Southern Power Company
                              Indiana Michigan Power Company
                              Kentucky Power Company
                              Kingsport Power Company
                              Ohio Power Company
                              Wheeling Power Company

                         Signature:  /s/
                                   ----------------------------

                         Name:       William J. Lhota
                                   ----------------------------

                         Title:      Executive Vice President
                                   ----------------------------

                         Date:       May 27, 1999
                                   ----------------------------
<PAGE>

                   Signature Page to the Alliance Agreement
                               establishing the
           Alliance Independent Transmission System Operator, Inc.,
                    Alliance Transmission Company, Inc. and
                      Alliance Transmission Company, LLC
                      ----------------------------------

                         Consumers Energy Company

                         Signature:     /s/
                                     ---------------------------------

                         Name:          David W. Joos
                                     ---------------------------------

                         Title:         President and CEO - Electric
                                     ---------------------------------

                         Date:          May 27, 1999
                                     ---------------------------------
<PAGE>

                   Signature Page to the Alliance Agreement
                               establishing the
           Alliance Independent Transmission System Operator, Inc.,
                    Alliance Transmission Company, Inc. and
                      Alliance Transmission Company, LLC
                      ----------------------------------

                         The Detroit Edison Company

                         Signature:    /s/
                                     --------------------------------------

                         Name:         Robert L. Buckler
                                     --------------------------------------

                         Title:        President, DTE Energy Distribution
                                     --------------------------------------

                         Date:         May 27, 1999
                                   ----------------------------------------
<PAGE>

                   Signature Page to the Alliance Agreement
                               establishing the
           Alliance Independent Transmission System Operator, Inc.,
                    Alliance Transmission Company, Inc. and
                      Alliance Transmission Company, LLC
                      ----------------------------------

                         FirstEnergy Corp.
                              on Behalf of:

                              The Cleveland Electric Illuminating Company
                              Ohio Edison Company
                              Pennsylvania Power Company
                              The Toledo Edison Company

                         Signature:     /s/
                                     -----------------------

                         Name:          Stanley F. Szwed
                                     -----------------------

                         Title:         Vice President
                                     -----------------------

                         Date:          May 27, 1999
                                     -----------------------
<PAGE>

                   Signature Page to the Alliance Agreement
                               establishing the
           Alliance Independent Transmission System Operator, Inc.,
                    Alliance Transmission Company, Inc. and
                      Alliance Transmission Company, LLC
                      ----------------------------------

                         Virginia Electric and Power Company

                         Signature:  /s/
                                     ----------------------------------------

                         Name:       James T. Earwood, Jr.
                                     ----------------------------------------

                         Title:      Vice President & General Manager, Bulk
                                     ----------------------------------------
                                     Power Delivery
                                     ----------------------------------------

                         Date:       May 27, 1999
                                     ----------------------------------------<PAGE>
                                                      Exhibit 10.22

                      [Virginia Power Letterhead]
May 26, 1989

Mr. James P. O'Hanlon
4680 Township Walk
Marietta, Georgia 30066

Dear Jim:

We were delighted to hear from you this morning confirming your decision to join
the Virginia Power team.  As discussed yesterday, your initial salary will be
$135,000 per year as Vice President--Nuclear Services reporting directly to me.
You will be given an up-front payment of $50,000, and an additional $25,000 at
the completion of your first year of employment.

In addition to yur base salary, you are eligible to participate in the following
two incentive plans with awards paid as a percentage of your salary grade
midpoint:

     o Annual Management Incentive Plan -
       Target Award = 20% of midpoint.
       Eligibility will begin January 1, 1990.

     o Long-term (3 year cycle) Performance Achievement Plan -
       Target Shares = 10% of midpoint.  You will be eligible
       for a prorata award from the 1989-91 Plan.

Your coverage under Virginia Power's Retirement Plan will begin after six (6)
months of employment.  To assist you with your retirement income, you will be
credited with 20 years of service upon attaining age 55, and 30 years of service
at age 60 when your actual service will be approximately 14 years.

I think you will find Virginia Power offers a competitive employment package.  I
understand Max Bartholomew provided you with information on the flexible
benefits program.  In addition, I am attaching/enclosing the following:

          o Benefits Summary - Attachment I
          o 1989 Policy Guidelines for Selection,
             Purchase, and Disposal of Executive
             Vehicles (Reference Group 3) - Enclosure I
          o Transfer/Relocation Policy
             and Guide (Reference Plan A--with an additional
             transfer allowance of three times gross monthly
             salary) Enclosure II
<PAGE>

Mr. James P. O'Hanlon
Page 2
May 26, 1989

We would like you to report on Thursday, June 15, 1989 at our Innsbrook
Technical Center, 5000 Dominion Boulevard, Short Pump, Virginia.  If our offer
as outlined here is acceptable, please sign in the space below and return a copy
to me for our files.  If you have any questions, please feel free to call me
collect at (804) 273-3551.

Jim, once again, let me welcome you aboard and I look forward to working with
you on the challenges and opportunities presented by our nuclear program.

Sincerely,

/s/ W. L. Stewart
-------------------------------
William L. Stewart
Senior Vice President - Nuclear

Enclosures

I accept the offer as described above.

/s/ James P. O'Hanlon
----------------------------------
James P. O'Hanlon

May 31, 1989
-----------------------------
     Date
<PAGE>

                                  ATTACHMENT I

                                 VIRGINIA POWER
                                 --------------

                                BENEFITS SUMMARY
                                ----------------

I.   FLEXIBLE BENEFITS PLANS
     -----------------------

      Immediately eligible to enroll yourself, your spouse, and your unmarried
      dependent children up to age 23.  The premium is shared by the employee
      (25%) and the Company (75%).  The Plan includes options for the following:

          o Medical (Comprehensive)
          o Vision
          o Dental
          o Long-term Disability
          o Employee Life Insurance
          o Employee Accidental Death and Dismemberment
          o Dependent Life Insurance
          o Health Care Account
          o Dependent Care Account

II.  EXECUTIVE SUPPLEMENTAL RETIREMENT PLAN
     --------------------------------------

     Eligible after 5 years employment to receive a benefit equal to 25% of
     final earnings (base + annual incentive) for 10 years.

III. AIR TRAVEL ACCIDENT PLAN
     ------------------------

     The Plan pays $200,000 to your beneficiary if you should die.  The Plan
     pays from  $50,000 to $200,000 for loss of limb or sight.

IV.  SAVINGS PLAN
     ------------

     Eligible to participate after 6 months of employment.  Contributions of up
     to 6% of pay are matched at 50% by the Company. An additional contribution,
     up to 10% (for a total of 16%) may be made by the employee.  You may direct
     your contributions to a Stock Fund or an Interest Bearing Account Fund.
     The Plan provides a tax deferred income option (401k). Certain restrictions
     regarding contributions apply to highly compensated employees.
<PAGE>

V.   GROUP UNIVERSAL LIFE INSURANCE
     ------------------------------

     You have the option to elect additional life insurance coverage at a group
     rate.

Page 2
BENEFIT SUMMARY

VI.   VEHICLE
      -------

      The company provides elected officers with a vehicle.  Option information
      is included in Enclosure II.

VIII. VACATION
      --------

      One week after 6 months employment.
      Two weeks after 1 year employment.
      Three weeks after 6 years employment.
      Four weeks after 14 years employment.
      Five weeks after 22 years employment.
      Six weeks after 30 years employment.

IX.   HOLIDAYS
      --------

      The company provides 11 paid holidays.

      ADDITIONAL INFORMATION OF THESE BENEFITS WILL BE PROVIDED TO YOU DURING
      YOUR EMPLOYEE ORIENTATION.
<PAGE>

                       Virginia Electric & Power Company

                 Arrangement Regarding Additonal Credited Years
                 ----------------------------------------------
        of Service for Retirement and Retirement Life Insurance Purposes
        ----------------------------------------------------------------

     The executive officer shown below has an arrangement with Virginia Electric
& Power Company, described in a May 26, 1989 letter (the Letter), relating to
inter alia, the payment of a supplemental retirement benefit.  The letter is
----- ----
revised as provided below.

     The supplemental retirement benefit described in paragraph 3 of the Letter
will be based on additional years of credited service, contingent upon the
executive officer's attaining the specified age and remaining in the employ of
Dominion Resources or one of its subsidiaries, as follows:

                               James P. O'Hanlon
                               -----------------

               Actual Service
               at Specified Age

                    55                       8 years
                    60                      13 years

               Credited Service
               at Specified Age

                    55                       20 years
                    60                       30 years

          The monthly supplemental retirement benefit payable to the executive
officer pursuant to the Letter will be computed in accordance with this
paragraph.  First, compute the monthly benefit that would be payable to or on
behalf of the executive officer under the tax-qualified defined benefit pension
plan maintained by Dominion Resources, Inc. or a subsidiary in which the
executive officer participates (the Retirement Plan) using the years of credited
service earned in accordance with the table set forth above.  The amount
determined under the preceding sentence will be reduced, but not below zero, by
the sum of (i), (ii), and, to the extent applicable, (iii) below where:

          (i) is the monthly benefit payable to or on behalf of the executive
          officer under the Retirement Plan;

          (ii) is the monthly benefit payable to or on behalf of the executive
          officer from his Credited Service Account under the Dominion
          Resources, Inc. Retirement Benefit Funding Plan (the Funding Plan);
          and
<PAGE>

                                 -2-

          (iii) is the sum of the amounts previously distributed to the
          executive officer from his Credited Service Account under section 6.01
          of the Funding Plan multiplied by a fraction.  The numerator of the
          fraction is one (1) and the denominator of the fraction is the number
          of months for which benefits are payable from the Credited Service
          Account.  If the executive officer receives a distribution from his
          Credited Service under section 6.01 of the Funding Plan after the
          commencement of the supplemental retirement benefit, the amount
          described in this item (iii) with respect to subsequent supplemental
          retirement benefits shall include the product of the amount of each
          such distribution multiplied by a fraction.  The numerator of that
          fraction is one (1) and the denominator is the number of months for
          which a benefit remains payable from the executive officer's Credited
          Service Account.

The amounts described in items (i) and (ii) shall be computed using the same
actuarial assumptions and methods and will assume that benefits will be paid in
the same form as the executive officer's benefit under the Retirement Plan.

     Item (iii) above shall not apply (and the monthly supplemental retirement
benefit payable to the executive pursuant to the Letter shall not be reduced on
account of the amounts described in item (iii) above), to the extent that the
application of item (iii) would result in the payment of an after-tax benefit
pursuant to the Letter, the Retirement Plan, and the Credited Service Account of
the Funding Plan that is less than the monthly supplemental retirement benefit
otherwise payable pursuant to the Letter, the Retirement Plan on an after-tax
basis. The amount payable pursuant to the Letter, the Retirement Plan and the
Credited Service Account of the Funding Plan on an after-tax basis shall be
determined using the policy or guidelines adopted by the Virginia Electric &
Power Company Organization and Compensation Committee for purposes of Section
6.01 of the Funding Plan and, in the absence of such policy or guidelines, shall
be determined using the maximum rates of federal, state, and local income taxes
that are applicable to the executive officer or if applicable, his surviving
spouse, beneficiary, or contingent annuitant.

     The monthly supplemental retirement benefit payable to the executive
officer shall be paid from the general corporate assets of Virginia Electric &
Power Company.

     In addition, the executive officer will be provided additional retirement
life insurance benefits based on the additional years of credited service shown
above, contingent upon the executive officer's attaining the stated age and
remaining in the employ of Dominion Resources or one of its subsidiaries.
<PAGE>

                              For Virginia Electric &
                               Power Company

/s/  James P. O'Hanlon         /s/ J. T. Rhodes
--------------------------    ---------------------------
     James P. O'Hanlon             James T. Rhodes
                                   President & Chief
                                   Executive Officer

Date:  Dec. 11, 1990               Date:  12/14/90
      --------------------                ---------------

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