Document:

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                                                                   EXHIBIT 10.15

                                MCN ENERGY GROUP
                      EXECUTIVE DEFERRED COMPENSATION PLAN

                    (AS RESTATED EFFECTIVE FEBRUARY 28, 2001)

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                                TABLE OF CONTENTS

<TABLE>
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         SECTION                                                                                               PAGE
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SECTION 1 - DEFINITIONS.........................................................................................  1

                      1.01.         "Account"...................................................................  1
                      1.02.         "Additional Pension Plan Benefit"...........................................  1
                      1.03.         "Additional Savings Plan Benefit"..... .....................................  2
                      1.04          "Affiliated Employer........................................................  2
                      1.05.         "Anniversary Date"..........................................................  2
                      1.06.         "Annual Base Salary"........................................................  2
                      1.07.         "Annual Incentive Compensation".............................................  2
                      1.08.         "Beneficiary"...............................................................  2
                      1.09.         "Benefit Agreement".........................................................  3
                      1.10.         "Board of Directors"........................................................  3
                      1.11.         "Code"......................................................................  3
                      1.12.         "Committee".................................................................  3
                      1.13.         "Company"...................................................................  3
                      1.14.         "Deferral"..................................................................  3
                      1.15.         "Deferral Period"...........................................................  3
                      1.16.         "Disability.................................................................  3
                      1.17.         "Effective Date"............................................................  3
                      1.18.         "ERISA" ....................................................................  3
                      1.19.         "Executive" ................................................................  3
                      1.19.         "Executive".................................................................  4
                      1.20.         "In Pay Status".............................................................  4
                      1.21.         "Leave".....................................................................  4
                      1.22.         "Participant"...............................................................  4
                      1.23.         "Pension Plan"..............................................................  4
                      1.24.         "Plan"......................................................................  4
                      1.25.         "Plan Interest Rate"........................................................  4
                      1.26.         "Plan Year".................................................................  4
                      1.27.         "Post-Retirement Survivor Benefit"..........................................  4
                      1.28.         "Pre-Retirement Survivor Benefit"...........................................  4
                      1.29.         "Retirement Date"...........................................................  4
                      1.30.         "Retirement Income Benefit".................................................  4
                      1.31.         "Savings Plan"..............................................................  5
                      1.32.         "Social Security Wage Base".................................................  5
                      1.33.         "Spouse"....................................................................  5

SECTION 2 - PARTICIPATION.......................................................................................  5

                      2.01.         Commencement of Participation...............................................  5
</TABLE>

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<TABLE>
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         SECTION                                                                                               PAGE
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                      2.02.         Deferrals...................................................................  5
                      2.03.         Election of Deferral........................................................  5
                      2.04.         Forgo Deferral for a Plan Year..............................................  6
                      2.05.         Increased Deferral..........................................................  6
                      2.06.         Establishment of Account....................................................  6
                      2.07.         Interaction with Other Plans................................................  7

SECTION 3 - FUNDING OF BENEFITS.................................................................................  7

                      3.01.         Unfunded Plan...............................................................  7
                      3.02.         Interest....................................................................  7

SECTION 4 - CLAIMS PROCEDURE....................................................................................  8

                      4.01.         Benefit Claims Procedure....................................................  8
                      4.02.         Appeals Procedure...........................................................  8

SECTION 5 - RETIREMENT INCOME BENEFITS..........................................................................  9

                      5.01.         Normal Retirement Benefit...................................................  9
                      5.02.         Termination Benefit......................................................... 10
                      5.03.         Disability.................................................................. 11
                      5.04.         Revocation of Designation as Executive...................................... 11
                      5.05.         Hardship Withdrawal Benefits................................................ 12

SECTION 6 - PRE-RETIREMENT SURVIVOR BENEFITS.................................................................... 12

                      6.01.         Pre-Retirement Survivor Benefit............................................. 12
                      6.02          Proof of Insurability....................................................... 13
                      6.03.         Exclusion for Suicide or Self-Inflicted
                                    Injury...................................................................... 14

SECTION 7 - POST-RETIREMENT SURVIVOR BENEFITS................................................................... 14

SECTION 8 - VESTING OF BENEFITS................................................................................. 14

SECTION 9 - ADDITIONAL PROVISIONS AFFECTING BENEFITS............................................................ 14

                      9.01.         Benefit Agreement........................................................... 14

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<TABLE>
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         SECTION                                                                                               PAGE
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                      9.02.         Leave of Absence............................................................ 15
                      9.03.         Alternative Forms of Benefit................................................ 15
                      9.04.         Tax Withholding............................................................. 15

SECTION 10 - ADMINISTRATION OF THE PLAN......................................................................... 15

                      10.01.        Duties and Power............................................................ 15
                      10.02.        Benefit Statements.......................................................... 15

SECTION 11 - AMENDMENT, SUSPENSION, AND TERMINATION............................................................. 15

                      11.01.        Right to Amend or Terminate................................................. 15
                      11.02.        Right to Surrender.......................................................... 15
                      11.03.        Non-ERISA Plan.............................................................. 16
                      11.04.        Right to Accelerate......................................................... 16

SECTION 12 - MISCELLANEOUS...................................................................................... 17

                      12.01.        Right to Continued Employment............................................... 17
                      12.02.        Prohibition Against Alienation.............................................. 17
                      12.03.        Sayings Clause.............................................................. 17
                      12.04.        Payment of Benefit of Incompetent........................................... 17
                      12.05.        Spouse's Interest........................................................... 17
                      12.06.        Successors.................................................................. 18
                      12.07.        Gender, Number and Heading.................................................. 18
                      12.08.        Legal Fees and Expenses..................................................... 18
                      12.09.        Choice of Law............................................................... 18
                      12.10.        Affiliated Employees........................................................ 18

SECTION 13 - CHANGE IN CONTROL PROVISIONS....................................................................... 18

                      13.01         General..................................................................... 18
                      13.02         Transfer to Rabbi Trust..................................................... 18
                      13.03         Lump Sum Payments........................................................... 19
                      13.04         Joint and Several Liability................................................. 19
                      13.05         Dispute Procedures.......................................................... 19
                      13.06         Definition of Change in Control............................................. 20
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Historical Background

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                                MCN ENERGY GROUP
                      EXECUTIVE DEFERRED COMPENSATION PLAN

                    (as restated effective February 28, 2001)

         MCN Energy Group Inc., a Michigan corporation (hereinafter referred to
as "MCN" or the "Company"), has adopted the MCN Energy Group Executive Deferred
Compensation Plan (hereinafter referred to as the "Plan") to provide
supplemental retirement income for certain Executives (hereinafter defined) and
to provide a measure of security for certain Executives through the payment of
death benefits to their Beneficiaries.

         The Company previously adopted the MCN Management Incentive Bonus
Compensation Plan ("Incentive Plan") which permitted participants to defer
awards made to them under the Incentive Plan. Effective as of January 1, 1990,
deferrals under the Incentive Plan were discontinued and account balances under
the Incentive Plan were transferred to the Plan.

         It is intended that this Plan provide benefits for "a select group of
management or highly compensated employees" within the meaning of Sections 201,
301 and 401 of ERISA (hereinafter defined), and therefore to be exempt from the
provisions of Parts 2, 3 and 4 of Title I of ERISA.

                                    SECTION 1
                                   DEFINITIONS

         The following words and terms as used herein shall, unless the context
clearly requires a different meaning, have the respective meanings hereinafter
set forth.

         1.01. "Account" means the record maintained by the Company of each
Participant's Deferrals, credited interest, Additional Pension Plan Benefit,
Additional Savings Plan Benefit, transfers from the MCN Energy Group Mandatory
Deferred Compensation Plan, transfers from the MCN Energy Group Long-Term
Incentive Plan and distributions under the Plan.

         1.02. "Additional Pension Plan Benefit" means an additional benefit
under this Plan, equal to the present value at the date of retirement under the
qualified plan or other termination of employment of the difference between (1)
the benefit that the Participant would have been entitled to receive under the
Pension Plan if he had not elected to defer any amount

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under the Plan, and (2) the benefit that the Participant is entitled to receive
under the Pension Plan.

         1.03. "Additional Savings Plan Benefit" means an additional monthly
benefit under this Plan, equal to the amount of any Company matching
contributions that would have been made on the Participant's deferred salary
under the terms of the Savings Plan plus (i) for periods from January 1, 1990 to
July 31, 1991, the income that would have been earned thereon based upon the
Participant's investment elections and the terms of the Savings Plan, and (ii)
for periods after July 31, 1991, interest based upon the Plan Interest Rate in
effect for such period which should be added to the Participant's account.

         1.04 "Affiliated Employer" means any corporation while such corporation
is a member of the same controlled group of corporations (within the meaning of
Section 414(b) of the Code) as the Company or any other employing entity while
such entity is under common control (within the meaning of Section 414(c) of the
Code) with the Company.

         1.05. "Anniversary Date" means any January 1 including or after the
Effective Date.

         1.06. "Annual Base Salary" means annual base salary payable in the
current Plan Year before any 401(k) deferral or cafeteria plan election and
before any payroll deduction for taxes or any other purpose, but excluding any
bonus, fringe benefit or other form of remuneration.

         1.07. "Annual Incentive Compensation" means the annual incentive plan
cash compensation earned in the current Plan Year and payable in the subsequent
Plan Year.

         1.08. "Beneficiary" means the person, persons or entity designated in
writing by the Participant on forms provided by the Company to receive
distribution of certain death benefits under the Plan in the event of the
Participant's death. A Participant may change the designated Beneficiary from
time to time by filing a new written designation with the Committee, and such
designation shall be effective upon receipt by the Committee. The designation of
a Beneficiary other than the Participant's Spouse must be consented to in
writing by the Spouse. If a Participant has not designated a Beneficiary, or if
a designated Beneficiary is not living or in existence at the time of a
Participant's death, any death benefits payable under the Plan shall be paid to
the Participant's Spouse, if then living, and if the Participant's Spouse is not
then living, to the Participant's estate.

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         1.09. "Benefit Agreement" means the benefit agreement described in
Section 9.01 relating to a Participant's commitment to defer Annual Base Salary,
as defined in Section 1.06, and/or Annual Incentive Compensation, as defined in
Section 1.07.

         1.10. "Board of Directors" means the MCN Board of Directors.

         1.11. "Code" means the Internal Revenue Code of 1986, as amended.

         1.12. "Committee" means the MCN Energy Group Inc. Master Trust,
Retirement and Savings Plan Committee. The Committee is responsible for the
administration of the Plan.

         1.13. "Company" means MCN Energy Group Inc., a Michigan corporation,
its successors and assigns, and any direct or indirect subsidiary of MCN which
has elected, with the consent of MCN, to participate in the Plan.

         1.14. "Deferral" means the portion of a Participant's Annual Base
Salary and/or Annual Incentive Compensation that has been deferred in accordance
with Section 2.03. Deferral amounts are retained by the Company as part of its
general assets.

         1.15. "Deferral Period" means the period beginning with the date of the
Participant's commencement of participation in the Plan and ending on the
earlier of

                  (a) the fifth Anniversary Date after such date; or

                  (b) the Participant's Retirement Date, as defined in Section
         1.29.

         1.16. "Disability" means the total and permanent inability, caused by
disease or bodily injury and originating after his designation as a Participant,
of an Executive to do substantially all the material duties of his regular job,
except that

                  (a) after such inability has continued for two years, such
         Executive shall be considered to be suffering Disability only if he
         cannot work for pay or profit at another job for which he is reasonably
         fitted by education, training or experience; and

                  (b) such Executive shall be considered to be suffering
         Disability only for those periods during which he is not working for
         pay or profit.

         1.17. "Effective Date" means January 1, 1990 and each January 1
thereafter.

         1.18 "ERISA" means the Employee Retirement Income Security Act of 1974,
as amended from time to time.

         1.19. "Executive" means a management or highly compensated employee of
the Company who has been specifically designated by the Chairman of the Board of
Directors to be eligible for Plan participation. Such an employee shall remain
an Executive so long as this

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designation is not revoked by the Chairman of the Board of Directors. Upon such
revocation, the former Executive shall be entitled to receive only those
benefits which have been vested.

         1.20. "In Pay Status" means, with respect to a benefit under the Plan,
that a Participant or Beneficiary has met all of the requirements to receive
such benefit and it is being paid or is about to be paid to such Participant or
Beneficiary.

         1.21. "Leave" means any period during which an Executive who is
employed by the Company immediately prior to the commencement thereof is absent
from the Company pursuant to a leave of absence granted with the permission of
the Company.

         1.22. "Participant" means an Executive who has made a written election
to participate in the Plan in accordance with Section 2.01.

         1.23. "Pension Plan" means, with respect to a Participant, any
Company-sponsored qualified defined benefit plan under which the Participant is
eligible to participate.

         1.24. "Plan" means the MCN Energy Group Executive Deferred Compensation
Plan, as described herein and as hereafter amended.

         1.25. "Plan Interest Rate" means the interest rate for the latest
issue, as of the end of the previous month, of ten-year U.S. Treasury Notes, or
such other rate as set by the Chairman of the Board of Directors.

         1.26. "Plan Year" means the period beginning January 1 and ending
December 31 of each year (the calendar year).

         1.27. "Post-Retirement Survivor Benefit", as described in Section 7.01,
means the benefit payable to the Beneficiary of a Participant who dies after the
commencement of his Retirement Income Benefit.

         1.28. "Pre-Retirement Survivor Benefit", as described in Section 6.01,
means the benefit payable to the Beneficiary of a Participant who dies prior to
his Retirement Date.

         1.29. "Retirement Date" for a Participant covered by a Pension Plan
means any normal or early retirement date specified in the Pension Plan, as
defined in Section 1.23; and for a Participant covered by a Savings Plan, but
not covered by a Pension Plan, means any normal or early retirement date
specified in the Savings Plan, as defined in Section 1.31.

         1.30. "Retirement Income Benefit" means the retirement benefit
described in Section 5.

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         1.31. "Savings Plan" means, with respect to a Participant, any Company
sponsored qualified defined contribution plan under which the Participant is
eligible to participate.

         1.32. "Social Security Wage Base" means the maximum amount of wages
subject to the old-age, survivor and disability portion of the Federal Insurance
Contributions Act tax.

         1.33. "Spouse" means an individual who is legally married to a
Participant under the laws of the state in which the Participant resides, on the
day immediately preceding the Participant's date of death.

                                    SECTION 2
                                  PARTICIPATION

         2.01. Commencement of Participation. An Executive shall become a
Participant hereunder upon execution of a Benefit Agreement by the Executive no
later than (i) the October 30 prior to its Effective Date, or (ii) 30 days after
an employee is designated an Executive. A properly executed Benefit Agreement
shall be effective on the earlier of (i) January 1 immediately following the
execution of the Benefit Agreement, or (ii) the first pay period that is 30 days
after the employee is designated an Executive, and shall contain the items
described in this Section and in Sections 5.01, 6.01 and 9.01. Subject to
Sections 2.02, 2.04 and 2.05, the deferral election made in a Benefit Agreement
shall be irrevocable.

         2.02. Deferrals. A Participant may continue to make the annual Deferral
provided under Section 2.03 with respect to his Benefit Agreement until his
designation as an Executive is revoked by the Chairman of the Board of
Directors, he terminates employment with the Company, he receives a hardship
withdrawal, or he revokes his Benefit Agreement after the completion of his
Deferral Period.

         2.03. Election of Deferral. A Participant shall elect in his Benefit
Agreement the annual Deferral that he will make for each Plan Year in which he
is a Participant, in multiples of $1,000 except for the $3,000 minimum. Such
annual Deferral shall not exceed 30% of Annual Base Salary and 100% of Annual
Incentive Compensation less the Federal Insurance Contributions Act tax on the
Annual Incentive Compensation and shall not be less than $3,000. An annual
Deferral of Annual Base Salary cannot reduce the Participant's Annual Base
Salary below the Social Security Wage Base for the Plan Year. An annual Deferral
of Annual Incentive

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Compensation shall be stated as a flat amount and shall not be greater than 100%
of the Participant's current year Annual Incentive Compensation less the Federal
Insurance Contributions Act tax on the Annual Incentive Compensation. A
Participant's election shall be irrevocable during the Deferral Period, subject
to Sections 2.02, 2.04 and 2.05. After a Participant's Deferral Period is
completed, the Participant may elect on an annual basis, before October 30,
whether he wishes to make a Deferral for the following Plan Year.

         2.04. Forgo Deferral for a Plan Year. A Participant may elect, no later
than October 30 prior to its Effective Date, to forgo the Deferral for the
remainder of the Deferral Period. This election cannot be made for the first
year in the Deferral Period. If this election is made for a Plan Year, the
Participant shall not be permitted to participate in the Plan for the two-year
period beginning with the January 1 immediately following the election to forgo
the Deferral. If the Participant thereafter elects to participate in the Plan,
such Participant shall begin a new Deferral Period. If a Participant dies prior
to his Retirement Date while employed by the Company and during a period that an
election to forgo Deferral is in effect, the Participant's Beneficiary shall not
be entitled to the Pre-Retirement Survivor Benefit under Section 6.01, but shall
receive a lump sum distribution of an amount equal to the Participant's Account
balance as of the Participant's date of death. Such lump sum payment shall be
made not later than one hundred twenty (120) days after the Participant's date
of death.

         2.05. Increased Deferral. A Participant may elect to increase the
annual Deferral that he will make for each Plan Year in which he is a
Participant by filing a new Benefit Agreement to that effect with the Committee.
The amount of any such increase shall be in multiples of $1,000, and the
increased annual Deferral shall not exceed the limits set forth in Section 2.03.
Such election will be effective on the January 1 after the new Benefit Agreement
is filed with the Committee. A Participant's election to increase the amount
deferred in a Plan Year will not preclude the Participant from reducing the
increased deferral in subsequent Plan Years. However, in no event may the
Deferral in subsequent Plan Years of the Deferral Period be reduced to an amount
less than the original annual Deferral amount.

         2.06. Establishment of Account. The Committee shall establish an
Account for each Participant to which the Participant's Deferrals shall be
credited, interest in accordance with Section 3.02 shall be credited, the
Participant's account balance, if any, under the Incentive Plan shall be
credited, the Additional Pension Plan Benefit shall be credited, the Additional
Savings

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Plan Benefit shall be credited, transfers from the MCN Energy Group Mandatory
Deferred Compensation Plan and MCN Energy Group Long-Term Incentive Plan shall
be credited and distributions shall be debited. A Participant's Deferrals shall
be credited to his Account as of the date the Deferral would have been paid to
the Participant. The Additional Pension Plan Benefit shall be credited to the
Participant's Account as of (i) the date of the Participant's retirement under
the qualified plan or other termination of employment for Participant's who have
the traditional benefit option under the Pension Plan, and (ii) each December 31
for Participant's who have the cash balance option under the Pension Plan. The
Additional Savings Plan Benefit shall be credited to the Participant's Account
as of the end of each month for which the Participant makes a Deferral under the
Plan. A Participant whose Account includes a transfer of assets from the
Incentive Plan shall be treated as having satisfied a year of the Deferral
Period for each of the Participant's years of participation in the deferral
portion of the Incentive Plan.

         2.07. Interaction with Other Plans. A Participant's Deferral may result
in a reduction of a Participant's benefit under the Pension Plan and the Savings
Plan due to restrictions imposed by the IRS on qualified plans. In order to
minimize the effect of this reduction, a Participant's Account shall be credited
with an Additional Pension Benefit and an Additional Savings Plan Benefit.

                                    SECTION 3
                               FUNDING OF BENEFITS

         3.01. Unfunded Plan. The Plan shall be unfunded. All benefits payable
under the Plan shall be paid from the Company's general assets. The Company
shall not be required to set aside or hold in trust any funds for the benefit of
a Participant or Beneficiary, who shall have the status of a general unsecured
creditor with respect to the Company's obligation to make benefit payments
pursuant to the Plan. Any assets of the Company available to pay Plan benefits
shall be subject to the claims of the Company's general creditors and may be
used by the Company in its sole discretion for any purpose.

         3.02. Interest. Interest shall be credited and compounded to each
Participant's Account, including that portion of the Account attributable to the
benefit described in Section

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2.07, on the last day of each month during each Plan Year based upon the Plan
Interest Rate in effect for such Plan Year for so long as there remains an
Account balance.

                                    SECTION 4
                                CLAIMS PROCEDURE

         4.01. Benefit Claims Procedure. All applications for benefits under the
Plan shall be submitted to the Committee at the Company's principal place of
business. Applications for benefits must be in writing and must be signed by the
Participant or, in the case of a Pre-Retirement or Post-Retirement Survivor
Benefit, by the Beneficiary or legal representative of the deceased Participant.
In the event of a Participant's death, a certified copy of the death certificate
will be required by the Committee. The Committee reserves the right to require
that the Participant furnish proof of his age prior to processing any
application. Each application shall be acted upon and approved or disapproved
within ninety (90) days following its receipt by the Committee. In the event any
application for benefits is denied in whole or in part, the Committee shall
notify the applicant in writing of such denial and of his right to a review by
the Committee and shall set forth, in a manner calculated to be understood by
the applicant, specific reasons for such denial, specific references to
pertinent Plan provisions on which the denial is based, a description of any
additional material or information necessary for the applicant to perfect his
application, an explanation of why such material or information is necessary,
and an explanation of the Plan's review procedure.

         4.02. Appeals Procedure. Any person whose application for benefits is
denied in whole or in part may appeal such denial to the Committee by submitting
a written statement to the Committee within ninety (90) days after receiving
written notice from the Committee of the denial of the claim. A written
statement should:

                  (a)   request a review by the Committee of the application for
                        benefits;

                  (b)   set forth all of the grounds upon which the request for
                        review is based and any facts in support thereof; and

                  (c)   set forth any issues or comments that the applicant
                        deems pertinent to his application.

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         The Committee shall regularly review appeals applications submitted to
it. The Committee shall act upon each appeal within sixty (60) days after
receipt of the applicant's request for review by the Committee.

         The Committee shall make a full and fair review of each such
application and any written materials submitted by the applicant or the Company
in connection therewith and may require the Company or the applicant to submit
such additional facts, documents, or other evidence as the Committee in its sole
discretion deems necessary or advisable in making such a review. On the basis of
its review, the Committee shall make an independent determination of the
applicant's eligibility for benefits under the Plan. The decision of the
Committee on any application for benefits shall be final and conclusive upon all
persons.

         In the event that the Committee denies an application in whole or in
part, the Committee shall give written notice of the Committee's decision to the
applicant setting forth, in a manner calculated to be understood by the
applicant, the specific reasons for such denial and specific references to the
pertinent Plan provisions on which the Committee's decision was based.

                                    SECTION 5
                           RETIREMENT INCOME BENEFITS

         5.01. Normal Retirement Benefit

                  (a) Each Participant who retires under the Pension or Savings
Plan on his Retirement Date shall be entitled to a Retirement Income Benefit
commencing on the first of the month following the month in which his Retirement
Date occurs. The Participant's Retirement Income Benefit shall be paid, in
accordance with the Participant's selection in his Benefit Agreement, either in
monthly payments over a period not less than one year and not more than 15
years, or as a lump sum distribution of the Participant's Account. The amount of
the monthly payments shall be calculated to pay out over the specified period
the entire balance in the Participant's Account as of his Retirement Date with
interest credited monthly on the declining balance at the Plan Interest Rate.
The Participant's Account shall continue to be credited monthly with interest at
the Plan Interest Rate and charged with the monthly payments to the Participant.
The amount of the monthly payments to the Participant shall be adjusted on
January

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1 of each year to reflect changes in the Plan Interest Rate and other changes in
the Participant's Account balance.

                  (b) A Participant's payment election may be changed at any
time prior to being In Pay Status by the Participant submitting a new payment
election to the Committee. However, any change received by the Committee less
than twelve months prior to the Participant's Retirement Date shall post-pone
any distribution from the Plan until a period of twelve months has elapsed.

                  (c) Nothwithstanding the Participant's payment election, if a
Participant's Account is less than or equal to $5,000 as of the end of the
quarter in which his Retirement Date occurs, the Participant's Account shall be
paid in one lump sum.

                  (d) A Participant whose Deferral Period is less than five
years may accelerate his Deferrals so that the sum of the Deferrals at the end
of his Deferral Period is equal to five times his annual Deferral. This
acceleration shall be effective beginning with the Plan Year following the year
a new Benefit Agreement indicating an increased annual Deferral is filed with
the Committee. The Participant's Retirement Income Benefit shall be paid in
accordance with the Participant's selection in his Benefit Agreement.

         5.02. Termination Benefit.

                  (a) A Participant who terminates employment prior to
retirement shall receive payment of the Participant's Account balance in
accordance with the Participant's election on his Benefit Agreement, either in
monthly payments over three (3) years or as a lump sum distribution. If no
election is indicated on the Participant's Benefit Agreement for termination
benefits, the Participant's termination benefit shall be paid to him in monthly
payments over three (3) years beginning no later than one hundred twenty (120)
days after termination of employment or revocation of designation as an
Executive. The amount of the monthly payments shall be calculated to pay out
over the three-year period the entire balance in the Participant's Account as of
his Retirement Date with interest credited monthly on the declining balance at
the Plan Interest Rate. The Participant's Account shall continue to be credited
monthly with interest at the Plan Interest Rate and charged with the monthly
payments to the Participant. The amount of the monthly payments to the
Participant shall be adjusted on January 1 of each year to reflect changes in
the Plan Interest Rate and other changes in the Participant's Account balance.
After

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<PAGE>   16

receiving a termination benefit, neither the Participant, nor the Participant's
Beneficiary shall be entitled to any further benefit hereunder.

                  (b) A Participant's termination payment election may be
changed at any time prior to being In Pay Status by the Participant submitting a
new payment election to the Committee. However, any change received by the
Committee less than twelve months prior to the Participant's Retirement Date
shall post-pone any distribution from the Plan until a period of twelve months
has elapsed.

                  (c) Nothwithstanding the Participant's termination payment
election, if a Participant's Account is less than or equal to $5,000 as of the
end of the quarter in which his termination date occurs, the Participant's
Account shall be paid in one lump sum.

         5.03. Disability. A Participant who has suffered a Disability shall be
deemed to be an Executive during such period and shall continue to be eligible
for Retirement Income Benefits under Section 5.01 without reduction and
Pre-Retirement and Post-Retirement Survivor Benefits under Sections 6.01 and
7.01. If the Disability occurs within a Deferral Period, and the disabled
Participant is determined by the Committee to be totally and permanently
disabled prior to the completion of the Deferral Period, the Committee shall
excuse him from making additional Deferrals under the applicable Benefit
Agreement, or shall reduce the amount of his required Deferrals, but no amounts
shall be credited to his Account with respect to such excused or reduced
Deferral(s). For all other Plan purposes, a Participant whose Deferrals have
been excused shall be deemed to have made all required Deferrals during his
Deferral Period.

         5.04. Revocation of Designation as Executive. A Participant whose
designation as an Executive is revoked prior to the Participant's retirement,
death, termination or disability shall not be permitted to continue to make
Deferrals under the Plan subsequent to the date of such revocation. However, all
monies that are in the Participant's Account as of the date of revocation shall
continue to be deferred in such Account until the Participant's retirement,
death, termination or disability.

         5.04. Hardship Withdrawal Benefits. At any time prior to the
commencement of Retirement Income Benefits hereunder, a Participant may request
that the Committee make a distribution to him of all or part of his Account
balance within 120 days. Such distribution shall be made only if the Committee
determines that the Participant is suffering from a financial hardship that
cannot be satisfied from his normal sources of income, and the distribution
shall be

                                       11
<PAGE>   17

limited to the amount required to meet the financial hardship. In making these
determinations, the Committee shall utilize the regulations proposed or adopted
by the U.S. Department of Treasury pursuant to Section 401(k) of the Code and
the rules under the Savings Plan. A financial hardship shall be satisfied from
(i) the Plan; (ii) the Supplemental Savings Plan; (iii) the MCN Energy Group
Long-Term Incentive Performance Share Plan; and (iv) finally from the Savings
Plan. After receiving a hardship distribution, neither the Participant, nor his
Beneficiary shall be entitled to any Pre-Retirement Survivor Benefit hereunder
unless the Participant completes two years of participation after the hardship
distribution, in which event the Pre-Retirement Survivor Benefit shall be based
solely on Deferrals after the hardship distribution. If a Participant dies
during the two years of participation after the hardship distribution, the
Pre-Retirement Survivor Benefit shall be computed as provided in Section 6.01,
except that the projection forward shall include hypothetical annual Deferrals
equal to zero.

                                    SECTION 6
                        PRE-RETIREMENT SURVIVOR BENEFITS

         6.01. Pre-Retirement Survivor Benefit. Except as provided in Sections
2.04, 5.04 and 6.02, if a Participant dies prior to his Retirement Date while
employed by the Company, his Beneficiary shall be entitled to receive an amount
equal to the present value, at the Participant's date of death, of the
Participant's Account balance projected forward to his Normal Retirement Date.
This projection forward will be accomplished by crediting to his Account balance
as of his date of death the amount of a hypothetical Deferral equal to the
average of the Participant's annual Deferrals for the five years immediately
preceding the Participant's death for the year of the Participant's death and
for all subsequent years through and including the year in which the
Participant's Normal Retirement Date falls and crediting interest on the Account
balance and any subsequent hypothetical Deferrals at the Plan Interest Rate in
effect on his date of death in order to arrive at the projected value of his
Account balance as of the Participant's Retirement Date. If the Participant did
not participate in the Plan for five years preceding the year of death, the
average will be computed based on a numerator equal to the total deferral
election in effect for the Deferral Period in which death occurred and a
denominator equal to five. This projected Account balance then will be converted
to its present value on the Participant's date of death

                                       12
<PAGE>   18

using 70% of the ten-year U.S. Treasury Note interest rate on the latest date
such notes were issued before the Participant's date of death. The
pre-retirement survivor benefit shall be paid in accordance with the
Participant's selection in his Benefit Agreement, either in monthly payments
over a period not less than one year and not more than 15 years, or as a lump
sum distribution. The payment option selected by the Participant on his Benefit
Agreement may be changed at any time by the Participant submitting a new payment
selection to the Committee, but a change shall be effective only if it is
received by the Committee at least 12 months before payments under the Plan
commence.

         Notwithstanding the foregoing, the Chairman of the Board of Directors
may, at the time of declaring the Executive eligible, designate an Executive to
be eligible only for Retirement Income Benefits and not the Pre-Retirement
Survivor Benefit. In the event of such a designation, the beneficiary of such an
Executive shall not receive any Pre-Retirement Survivor Benefit under this
Section.

         6.02 Proof of Insurability. If a new Participant is uninsurable, or
does not cooperate in the application for life insurance, such Participant's
Beneficiary shall not be entitled to receive a Pre-Retirement Survivor Benefit
under Section 6.01. The Beneficiary of such a Participant shall receive a
distribution of an amount equal to the Participant's Account balance as of the
Participant's date of death. Such distribution shall be paid in accordance with
the Participant's selection on his Benefit Agreement, either in monthly payments
over a period not less than one year and not more than 15 years, or as a lump
sum distribution.

         If a Participant, who was insurable at the time participation in the
Plan commenced, elects to increase his Deferral, such increase shall not be
reflected in computing the Pre-Retirement Survivor Benefit under Section 6.01 if
the Participant became uninsurable prior to electing the increased Deferral or
does not cooperate in the application for life insurance.

         6.03. Exclusion for Suicide or Self-Inflicted Injury. Notwithstanding
any other provision of the Plan, no Pre-Retirement Survivor Benefits in excess
of a Participant's Account balance as of his date of death shall be paid to any
Participant or Beneficiary in the event the Participant dies as the result of
suicide or self-inflicted injury within two years after January 1 of the first
year of participation.

                                       13
<PAGE>   19

                                    SECTION 7
                        POST-RETIREMENT SURVIVOR BENEFITS

         The Beneficiary of a Participant who dies after commencement of his
Retirement Income Benefit shall be entitled to continue to receive the
Retirement Income Benefit payments being made to the Participant under Section
5.01 for the remainder of the period over which benefits were being paid to the
deceased Participant.

                                    SECTION 8
                               VESTING OF BENEFITS

         A Participant shall be 100% vested in his benefits under the Plan at
all times except as set forth in Sections 5.02, 6.01, 6.02, 6.03, 9.02, 9.03,
11.02, 11.03 and 11.04. A Participant shall rank as an unsecured creditor of the
Company for all benefits under the Plan.

                                    SECTION 9
                    ADDITIONAL PROVISIONS AFFECTING BENEFITS

         9.01. Benefit Agreement. The Committee shall provide to each Executive
a form of Benefit Agreement with respect to each Deferral Period for which the
Committee will permit the Executive to make Deferrals. The Benefit Agreement
shall set forth the Executive's acceptance of the benefits provided hereunder,
his agreement to be bound by the terms of the Plan, and such other matters as
are set forth in this Plan or deemed advisable by the Committee.

         9.02. Leave of Absence. An Executive who is on Leave, with or without
salary, for a period of not more than one year, shall be deemed to be an
Executive employed by the Company during such Leave. An Executive who is on
Leave without salary for a period in excess of one year shall forfeit his
Pre-Retirement Survivor Benefit and shall not be entitled to any Pre-Retirement
Survivor Benefit hereunder unless the Participant completes five years of
participation after such leave in which event the Pre-Retirement Survivor
Benefit shall be based solely on Deferrals after the Leave.

                                       14
<PAGE>   20

         9.03. Alternative Forms of Benefit. The Committee in its sole
discretion, at the written request of the recipient submitted to the Committee
no later than 12 months prior to the commencement of benefit distributions to
the recipient, may elect to pay the Participant, Spouse or Beneficiary an
actuarially equivalent lump-sum, annuity or other form of benefit that it deems
appropriate in lieu of the form of benefit otherwise provided in Sections 5, 6
or 7.

         9.04. Tax Withholding. Benefit payments hereunder shall be subject to
applicable federal, state or local tax withholding laws.

                                   SECTION 10
                           ADMINISTRATION OF THE PLAN

         10.01. Duties and Power. The Committee shall be responsible for the
general administration of the Plan and the proper execution of its provisions.
It shall also be responsible for the interpretation of the Plan and the
determination of all questions arising thereunder. It shall maintain all
necessary books of accounts and records. It shall have power to establish,
interpret, enforce, amend, and revoke, from time to time, such rules and
regulations for the administration of the Plan and the conduct of its business
as it deems appropriate, including the right to remedy ambiguities,
inconsistencies and omissions (provided such rules and regulations are uniformly
applied to all persons similarly situated). Any action that the Committee is
required or authorized to take shall be final and binding upon each and every
person who is or may become a Plan Participant or Beneficiary. The Committee may
amend this Plan to comply with changes to the Code, so long as the amendment
does not materially increase the cost of maintaining the Plan or change benefits
to Participants or Beneficiaries.

         10.02. Benefit Statements. No later than 120 days after the end of each
Plan Year, the Committee will provide each Participant with a statement setting
forth the Participant's Account balance as of the last day of the immediately
preceding Plan Year.

                                       15
<PAGE>   21

                                   SECTION 11
                     AMENDMENT, SUSPENSION, AND TERMINATION

         11.01. Right to Amend or Terminate. The Plan may be amended or
terminated by the Board of Directors at any time. Such amendment or termination
may modify or eliminate any benefit hereunder except that such amendment or
termination shall not affect the rights of Participants or Beneficiaries to the
vested portion of a Participant's Account as of the date of such amendment or
termination.

         11.02. Right to Suspend. If the Board of Directors determines that
payments under the Plan would have a material adverse affect on the Company's
ability to carry on its business, the Board of Directors may suspend such
payments temporarily for such time as in its sole discretion it deems advisable,
but in no event for a period in excess of one year. The Company shall pay such
suspended payments in a lump sum immediately upon the expiration of the period
of suspension.

         11.03. Non-ERISA Plan. The Plan is intended to provide benefits for "a
select group of management or highly compensated employees" within the meaning
of Sections 201, 301 and 401 of ERISA, and therefore to be exempt from Sections
2, 3 and 4 of Title 1 of ERISA. Accordingly, the Plan shall terminate and
existing Account balances and other benefits In Pay Status shall be paid in a
single, actuarially equivalent lump-sum and no further benefits, vested or
non-vested, shall be paid hereunder in the event it is determined by a court of
competent jurisdiction or by an opinion of counsel that the Plan constitutes an
employee pension benefit plan within the meaning of Section 3(2) of ERISA which
is not so exempt.

         11.04. Right to Accelerate. The Board of Directors in its sole
discretion may accelerate all vested benefits upon termination of the Plan, and
pay such benefits in a single, actuarially equivalent lump sum.

                                       16
<PAGE>   22

                                   SECTION 12

                                  MISCELLANEOUS

         12.01. Right to Continued Employment. Nothing in the Plan shall be
construed as giving any person employed by the Company the right to be retained
in the Company's employ. The Company expressly reserves the right to dismiss any
person at any time, with or without cause, without liability for the effect that
such dismissal might have upon him as a Participant in the Plan.

         12.02. Prohibition Against Alienation. Except as otherwise provided in
the Plan, no right or benefit under the Plan shall be subject in any manner to
anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, or
charge, and any attempt to so anticipate, alienate, sell, transfer, assign,
pledge, encumber, or charge the same shall be void. No such right or benefit
shall be liable for or subject to the debts, contracts, liabilities,
engagements, or torts of the person entitled to such right or benefit.

         12.03. Sayings Clause. If any provision of this instrument shall be
finally held by a court of competent jurisdiction to be invalid or
unenforceable, the remaining provisions hereof shall continue to be fully
effective.

         12.04. Payment of Benefit of Incompetent. In the event the Committee
finds that a Participant, former Participant, or Beneficiary is unable to care
for his affairs because of his minority, illness, accident, or other reason, any
benefits payable hereunder may, unless other claim has been made therefor by a
duly appointed guardian, committee or other legal representative, be paid to a
spouse, child, parent, or other blood relative or dependent or to any person
found by the Committee to have incurred expenses for the support and maintenance
of such Participant, former Participant, or Beneficiary; and any such payments
so made shall be a complete discharge of all liability therefor.

         12.05. Spouse's Interest. The interest in the benefits hereunder of a
Spouse of a Participant who has predeceased the Participant shall automatically
pass to the Participant and shall not be transferable by such Spouse in any
manner including but not limited to such Spouse's will, nor shall such interest
pass under the laws of intestate succession.

                                       17

<PAGE>   23

         12.06. Successors. In the event of any consolidation, merger,
acquisition or reorganization of the Company, the obligations of the Company
under this Plan shall continue and be binding upon the Company and its
successors.

         12.07. Gender, Number and Heading. Whenever any words are used herein
in the masculine gender, they shall be construed as though they were also used
in the feminine gender in all cases where they would so apply. Whenever any
words used herein are in the singular form, they shall be construed as though
they were also used in the plural form in all cases where they would so apply.
Headings of sections and subsections as used herein are inserted solely for
convenience and reference and constitute no part of the Plan.

         12.08. Legal Fees and Expenses. The Company shall pay all legal fees
and expenses that a Participant may incur as a result of the Company contesting
the validity, enforceability, or the Participant's interpretation of, or
determinations under this Plan, other than Section 5.04.

         12.09. Choice of Law. This Plan shall be governed by and construed in
accordance with the laws of the State of Michigan to the extent not superseded
by applicable federal statutes or regulations.

         12.10. Affiliated Employees. An affiliate of the Company may adopt the
Plan, with the consent of the Company, in order to become a participating
employer under the Plan. A participating employer may withdraw from the Plan by
filing a notice with the Committee. Transfers of employment between
participating employers and the Company or other participating employers will be
treated as continuous and uninterrupted service under the Plan.

                                   SECTION 13

                          CHANGE IN CONTROL PROVISIONS

         13.01 General. In the event of a Change in Control, as defined in
Section 13.06, then, notwithstanding any other provision of the Plan, the
provisions of this Section 13 shall be applicable and shall supersede any
conflicting provisions of the Plan. For purposes of Section 13.06 only, the term
"Company" shall mean MCN Corporation, its successors and assigns.

         13.02 Transfer to Rabbi Trust. The Company has established a trust
pursuant to a Trust Agreement dated January 3, 1991 (the "Rabbi Trust"). The
terms of the Rabbi Trust

                                       18

<PAGE>   24

provide that, in the event of a Change in Control and thereafter, assets are to
be transferred to such Trust to provide benefits under the Plan. The Company
shall make all transfers of funds required by the Rabbi Trust in a timely manner
and shall otherwise abide by the terms of the Rabbi Trust.

         13.03 Lump Sum Payments. In a Change in Control situation, the Chairman
of MCN shall have the absolute discretion to direct that a lump sum payment be
made to a Participant up to the total value of such Participant's Account in the
year of the Change in Control if such payment will reduce the amount of any
potential excise tax imposed by Code Section 4999.

         13.04 Joint and Several Liability. Upon and at all times after a Change
in Control, the liability under the Plan of the Company and each Affiliated
Employer that has adopted the Plan shall be joint and several so that the
Company and each such Affiliated Employer shall each be liable for all
obligations under the Plan to each employee covered by the Plan, regardless of
the corporation by which such employee is employed.

         13.05 Dispute Procedures. In the event that, upon or at any time
subsequent to a Change in Control, a claim for benefits under the Plan of a
Participant or Beneficiary who has exhausted the claims and appeals procedures
set forth in Section 4.01 and 4.02 is denied in whole or in part, the following
additional procedures shall be applicable:

                  (a) Any amount that is not in dispute shall be paid to the
Participant or Beneficiary at the time or times provided herein.

                  (b) The Company shall advance to such claimant from time to
time such amounts as shall be required to reimburse the claimant for reasonable
legal fees, costs and expenses incurred by such claimant in seeking a judicial
resolution of his or her claim, including reasonable fees, costs and expenses
relating to appeals; provided, however, that the Company shall not be obligated
to advance to the claimant any amounts under this Section 13.04(b) unless and
until the claimant agrees in writing to repay to the Company, immediately upon
the occurrence of a final judicial determination with respect to such dispute,
any amount of such fees, costs and expenses that is not awarded to such claimant
in a final order of a court of competent jurisdiction.

                                       19

<PAGE>   25

         13.06 Definition of Change in Control. A "Change of Control" means:

                  (a) The acquisition by any individual, entity or group (within
the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of
1934, as amended (the "Exchange Act")) (a "Person") of beneficial ownership
(within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 20% or
more of either (i) the then outstanding shares of common stock of the Company
(the "Outstanding Company Common Stock") or (ii) the combined voting power of
the then outstanding voting securities of the Company entitled to vote generally
in the election of directors (the "Outstanding Company Voting Securities");
provided, however, that the following acquisition shall not constitute a Change
of Control: (A) any acquisition directly from the Company (excluding an
acquisition by virtue of the exercise of a conversion privilege), (B) any
acquisition by the Company, (C) any acquisition by any employee benefit plan (or
related trust) sponsored or maintained by the Company or any corporation
controlled by the Company or (D) any acquisition by any corporation pursuant to
a reorganization, merger or consolidation, if, following such reorganization,
merger or consolidation, the conditions described in clauses (i), (ii) and (iii)
of subsection (c) of this Section 13.06 are satisfied; or

                  (b) Individuals who, as of the date hereof, constitute the
Board (the "Incumbent Board") cease for any reason to constitute at least a
majority of the Board; provided, however, that any individual becoming a
director subsequent to the date hereof whose election, or nomination for
election by the Company's shareholders, was approved by a vote of at least a
majority of the directors then comprising the Incumbent Board shall be
considered as though such individual were a member of the Incumbent Board, but
excluding, for this purpose, any such individual whose initial assumption of
office occurs as a result of either an actual or threatened election contest (as
such terms are used in Rule 14a-11 of Regulation 14A promulgated under the
Exchange Act) or other actual or threatened solicitation of proxies or consents
by or on behalf of a Person other than the Board; or

                  (c) Approval by the shareholders of the Company of a
reorganization, merger or consolidation, in each case, unless, following such
reorganization, merger or consolidation, (i) more than 60% of, respectively, the
then outstanding shares of common stock of the corporation resulting from such
reorganization, merger or consolidation and the combined voting power of the
then outstanding voting securities of such corporation entitled to vote
generally in the election of directors is then beneficially owned, directly or
indirectly, by all or substantially all of

                                       20

<PAGE>   26

the individuals and entities who were the beneficial owners, respectively, of
the Outstanding Company Common Stock and Outstanding Company Voting Securities
immediately prior to such reorganization, merger or consolidation in
substantially the same proportions as their ownership, immediately prior to such
reorganization, merger or consolidation, of the Outstanding Company Common Stock
and Outstanding Company Voting Securities, as the case may be, (ii) no Person
(excluding the Company, any employee benefit plan or related trust) of the
Company or such corporation resulting from such reorganization, merger or
consolidation and any Person beneficially owning, immediately prior to such
reorganization, merger or consolidation, directly or indirectly, 20% or more of
the Outstanding Company Common Stock or Outstanding Voting Securities, as the
case may be, beneficially owns, directly or indirectly, 20% or more of,
respectively, the then outstanding shares of common stock of the corporation
resulting from such reorganization, merger or consolidation or the combined
voting power of the then outstanding voting securities of such corporation
entitled to vote generally in the election of directors and (iii) at least a
majority of the members of the board of directors of the corporation resulting
from such reorganization, merger or consolidation were members of the Incumbent
Board at the time of the execution of the initial agreement providing for such
reorganization, merger or consolidation; or

                  (d) Approval by the shareholders of the Company of (i) a
complete liquidation or dissolution of the Company or (ii) the sale or other
disposition of all or substantially all of the assets of the Company, other than
to a corporation, with respect to which following such sale or other
disposition, (A) more than 60% of, respectively, the then outstanding shares of
common stock of such corporation and the combined voting power of the then
outstanding voting securities of such corporation entitled to vote generally in
the election of directors is then beneficially owned, directly or indirectly, by
all or substantially all of the individuals and entities who were the beneficial
owners, respectively, of the Outstanding Company Common Stock and Outstanding
Company Voting Securities immediately prior to such sale or other disposition in
substantially the same proportion as their ownership, immediately prior to such
sale or other disposition, of the Outstanding Company Common Stock and
Outstanding Company Voting Securities, as the case may be, (B) no Person
(excluding the Company and any employee benefit plan (or related trust) of the
Company or such corporation and any Person beneficially owning, immediately
prior to such sale or other disposition, directly or indirectly, 20% or more of
the Outstanding Company Common Stock or Outstanding

                                       21

<PAGE>   27

Company Voting Securities, as the case may be beneficially owns, directly or
indirectly, 20% or more of, respectively, the then outstanding shares of common
stock of such corporation and the combined voting power of the then outstanding
voting securities of such corporation entitled to vote generally in the election
of directors and (C) at least a majority of the members of the board of
directors of such corporation were members of the Incumbent Board at the time of
the execution of the initial agreement or action of the Board providing for such
sale or other disposition of assets of the Company.

         IN WITNESS WHEREOF, MCN Corporation has caused this Plan to be executed
as of this 28th day of February 2001.

                                MCN Energy Group Inc.

                                 By:
                                     --------------------------------
                                     Daniel L. Schiffer, Senior Vice President,
                                     General Counsel and Secretary

                                       22
<PAGE>   28

                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                             DEFERRAL ELECTION FORM

<TABLE>
<S><C>
================================================================================================================================
Employee Name                                        | Social Security No.                                | I.D. Number

--------------------------------------------------------------------------------------------------------------------------------
Address (Number/Street)                     | City                     | State          | Zip Code

================================================================================================================================
</TABLE>

In accordance with the terms of the MCN Energy Group Executive Deferred
     Compensation Plan ("Plan") which is hereby incorporated by reference, I
     hereby accept and agree to all the provisions of the Plan and irrevocably
     elect pursuant to Section 2 of the Plan to defer a portion of my
     compensation as indicated below.

     Amount to be Deferred

     I designate the following amounts to be deferred under the terms of the
     Plan:

     $       .00  Annual Incentive Compensation (up to a maximum of 100% of the
      ----------  current year's target Annual Incentive Compensation less the
                  applicable FICA tax)

     $       .00  Annual Base Salary (a minimum required deferral of $3,000
      ----------  up to a maximum of 30% of Annual Base Salary in $1,000
                  increments, but in no event may Annual Base Salary be reduced
                  below the Social Security Wage Base)

     Payment Election

          That the amount deferred shall be paid to me after termination of my
          employment with the Company and its subsidiaries by reason of
          retirement, disability, or death, in the manner specified below:

                  Lump-sum payment
          ----
                  Payment in monthly installments over       years (in one
          ----    year increments, not to exceed 15 years)

     I understand that, in addition to the above payment, I may be eligible for
     a hardship withdrawal pursuant to Section 5 of the Plan.

     Termination Election

          That the amount deferred shall be paid to me after termination of my
          employment with the Company and its subsidiaries for any reason, other
          than retirement, disability or death, or after my designation as an
          Executive is revoked, in the manner specified below:

                  Lump-sum payment
          ----

<PAGE>   29

                  Payment in monthly installments over 3 years.
          ----
<TABLE>
<S><C>
================================================================================================================================
Employee Signature                                                                               | Date

--------------------------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                              | Title                    | Date

================================================================================================================================
</TABLE>

      Revised July 28, 1998

<PAGE>   30

                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                          BENEFICIARY DESIGNATION FORM

<TABLE>
<S><C>
================================================================================================================================
Employee Name                       | Social Security No.                               | I.D. Number

--------------------------------------------------------------------------------------------------------------------------------
Address (Number/Street)                     | City                     | State          | Zip Code

================================================================================================================================
         I HEREBY DESIGNATE, PURSUANT TO SUBSECTION 1.06 OF THE ABOVE-REFERENCED
         PLAN, THE BELOW DESIGNATED PERSON(S) AS MY BENEFICIARY IN THE EVENT OF
         MY DEATH:

--------------------------------------------------------------------------------------------------------------------------------
 BENEFICIARY'S NAME        | ADDRESS

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

================================================================================================================================

         IN THE EVENT ANY OF THE ABOVE-NAMED BENEFICIARIES SHOULD PREDECEASE ME,
         OR SHALL SURVIVE ME BUT DIE BEFORE RECEIVING ALL AMOUNTS TO BE PAID, I
         HEREBY NAME THE FOLLOWING AS A CONTINGENT BENEFICIARY TO RECEIVE ANY
         SUCH UNPAID AMOUNTS:

--------------------------------------------------------------------------------------------------------------------------------
 BENEFICIARY'S NAME        | ADDRESS

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------

================================================================================================================================
         IN THE EVENT NONE OF THE ABOVE-NAMED BENEFICIARIES SURVIVE ME, ANY
         UNPAID AMOUNTS SHALL BE PAID TO MY LAWFUL SUCCESSOR IN INTEREST. I
         RESERVE THE RIGHT TO CHANGE THIS BENEFICIARY DESIGNATION AT ANY TIME BY
         FILING WITH THE COMMITTEE OR ITS DESIGNEE A NEW BENEFICIARY DESIGNATION
         FORM.

         I UNDERSTAND THAT MY MOST RECENT ELECTION AS TO THE BENEFICIARY
         DESIGNATION WILL APPLY TO ALL AWARD AMOUNTS DEFERRED BY ME AT ANY TIME.

--------------------------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>   31
<TABLE>
<S><C>

Employee Signature                                                                               | Date
--------------------------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                              | Title                    | Date

================================================================================================================================
</TABLE>

<PAGE>   32

                                       MCN

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                              HISTORICAL BACKGROUND

01/01/90      MCN Corporation adopts Plan effective 01/01/90.

02/28/90      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved an amendment that provides for new definitions of "Cause"
              and "Change in Control" (Section 13).

05/06/92      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved new Section 1.29, "Social Security Wage Base", effective
              01/01/91; new Section 2.03, "Election of Deferral", effective
              01/01/92; and amended Section 2.09, "Interaction With Other
              Plans", effective 08/01/91; new sentence at the end of Section
              10.01 Administration of the Plan "Duties and Power" effective
              06/01/92.

08/15/92      Plan restated.

07/27/95      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved the Plan restatement to reflect the fact that not all
              participants [those employed by Genix] are participants in
              MichCon's Pension Plan. The Plan was amended to continue to cover
              employees of MCN who are not part of the Pension Plan.

02/22/96      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved the Plan restatement effective 1/1/96 to reflect the fact
              an election to defer a bonus amount must be stated in a flat
              dollar amount not to exceed the current year's target bonus. This
              change will enable the Plan Administrator to project the amount of
              the deferral with more certainty for purposes of purchasing
              insurance to fund the benefit that will ultimately be paid. The
              Plan was amended to permit a participant to elect out of the Plan
              after the first year of participation. Certain consequences were
              attached to such election to encourage continued participation.
              The Plan was amended to clarify that if a participant elects to
              increase the amount of an annual deferral, that subsequent
              deferrals may be reduced. However, such reduction may not reduce
              subsequent deferrals to an amount less than the amount of the
              original deferral. The Plan was amended to provide that the
              additional pension benefit and additional savings plan benefit
              will be credited to the participant's account balance. This will
              eliminate confusion as to when those benefits must be paid. The
              Plan was amended to provide participants with the option to elect
              to have termination benefits paid out over a three-year period or
              as a lump sum. If no election is made, termination benefits will
              be paid in monthly installments over three years beginning no
              later than

<PAGE>   33
              120 days after termination of employment. The Plan was amended to
              clarify the computation of the pre-retirement survivor benefit.
              The Plan was amended to add a provision requiring proof of
              insurability. The Plan was amended to clarify that the change of
              control provisions relate to the change of control of MCN
              Corporation.

              These amendments are reflected in Section 1.01, "Account"; the
              addition of Sections 1.02, "Additional Pension Plan Benefit" ,
              1.03, "Additional Savings Plan Benefit", and 1.04, (Affiliated
              Employer"; the amendments to Sections 2.01, "Commencement of
              Participation" and 2.03, "Election of Deferral"; the deletion of
              Section 2.04, "Acceleration of Deferral"; the amendment of Section
              2.05, "Forgo Deferral for a Plan Year" and redesignation as
              Section 2.04; the deletion of Section 2.06, "Revocation of
              Deferral"; the amendment and redesignation of Section 2.07 to
              2.05, "Increased Deferral"; the amendment and redesignation of
              Section 2.08 to 2.06, "Establishment of Account"; the amendment
              and redesignation of Section 2.09 to 2.07, "Interaction with Other
              Plans"; amendments to Sections 5.02 "Termination Benefit", 5.04,
              "Hardship Withdrawal Benefits" and 6.01, "Pre-Retirement Survivor
              Benefit"; the addition of new Section 6.02, Proof of
              Insurability"; the redesignation of prior 6.02 to Section 6.03;
              and the amendment to Section 13.01, "General".

08/27/98      MCN Energy Group Inc. Minutes of Regular Meeting of Board of
              Directors approved the Plan amendment and restatement effective
              January 1, 1998, to reflect the change of the Company's name to
              MCN Energy Group Inc and the name of the plan to the MCN Energy
              Group Executive Deferred Compensation Plan.

              Section 1.12 was amended to change the name of the Committee from
              "the Savings Plan Committee under the MichCon Savings and Stock
              Ownership Plan" to the " MCN Energy Group Inc. Master Trust,
              Retirement and Savings Plan Committee."

              Section 2.01 is amended to add that an Executive may become a
              Participant no later than 30 days after he is designated an
              Executive.

              Section 2.06 is amended to revise the third sentence to read as
              shown. Prior to amendment, the sentence read as follows:

                  The Additional Pension Plan Benefit shall be credited to the
                  Participant's Account as of the date of the Participant's
                  retirement under the qualified plan or other termination of
                  employment.

              Section 2.07 was amended to read as shown. Prior to amendment,
              Section 2.07 read as follows:

<PAGE>   34

                  Interaction with Other Plans. The deferral of Annual Base
                  Salary (but not Annual Incentive Compensation) may result in a
                  reduction of a Participant's benefit under the Pension Plan
                  and the Savings Plan due to restrictions imposed by the IRS on
                  qualified plans. In order to minimize the effect of this
                  reduction, a Participant's Account shall be credited with an
                  Additional Pension Benefit and an Additional Savings Plan
                  Benefit.

              This amendment was necessary due to the addition of bonuses to the
              definition of compensation for purposes of Retirement Plan and
              Savings Plan computations for Cash Balance Participants.

              Sections 5.01 and 6.01 were amended to eliminate the restriction
              on monthly payments of 5, 10, or 15 years and permit monthly
              payments over a period of any number of years from one to 15 and
              to permit a change in payment option if made at least 12 (as
              opposed to 36) months prior to the start of payments under the
              Plan.

              Section 6.02 was amended to reflect the availability of annual
              payments over a period of one to 15 years.

              Section 9.03 was amended to permit a change in payment option if
              made at least 12 (as opposed to 36) months prior to the start of
              payments under the Plan.

12/15/99      MCN Energy Group Inc. Minutes of Regular Meeting of Board of
              Directors approved the Plan amendment and restatement effective
              December 15, 1999, to reflect the following changes:

              Section 1.01 was amended to add "transfers from the MCN Energy
              Group Mandatory Deferred Compensation Plan and MCN Energy Group
              Long-Term Incentive Plan" after "Additional Savings Plan Benefit."

              Section 2.06 is amended to add "transfers from the MCN Energy
              Group Mandatory Deferred Compensation Plan and MCN Energy Group
              Long-Term Incentive Plan shall be credited" before "and
              distributions shall be debited" in the first sentence.

              Sections 13.03, 13.04 and 13.05 were redesignated as Sections
              13.04, 13.05 and 13.06, respectively. A new Section 13.03, Lump
              Sum Payments, was added to read as shown.

2/28/01       The MCN Energy Group Board of Directors approved the Plan
              amendment and restatement effective February 28, 2001, to reflect
              the following changes:

<PAGE>   35

              Section 5.01(a) was amended to read as shown. Prior to such
              amendment, Section 5.01(a) read as follows:

                      (a) Each Participant who retires under the Pension or
              Savings Plan on his Retirement Date after the completion of his
              Deferral Period shall be entitled to a Retirement Income Benefit
              commencing on the first of the month following the month in which
              his Retirement Date occurs. The Participant's Retirement Income
              Benefit shall be paid, in accordance with the Participant's
              selection in his Benefit Agreement, either in monthly payments
              over a period not less than one year and not more than 15 years,
              or as a lump sum distribution of the Participant's Account. The
              payment option selected by the Participant on his Benefit
              Agreement may be changed at any time by the Participant by
              submitting a new payment selection to the Committee, but a change
              shall be effective only if it is received by the Committee at
              least 12 months before payments under the Plan commence. The
              amount of the monthly payments shall be calculated to pay out over
              the specified period the entire balance in the Participant's
              Account as of his Retirement Date with interest credited monthly
              on the declining balance at the Plan Interest Rate. The
              Participant's Account shall continue to be credited monthly with
              interest at the Plan Interest Rate and charged with the monthly
              payments to the Participant. The amount of the monthly payments to
              the Participant shall be adjusted on January 1 of each year to
              reflect changes in the Plan Interest Rate and other changes in the
              Participant's Account balance.

              Section 5.01(b) was deleted in its entirety and replaced with a
              new Section 5.01(b). Prior to its deletion, the prior Section
              5.01(b) read as follows:

                      (b) Each Participant who retires under the Pension Plan or
              Savings Plan on his Retirement Date prior to the completion of his
              Deferral Period shall receive a lump sum distribution in an amount
              equal to the Participant's Account balance on his

<PAGE>   36

              Retirement Date. Such distribution shall be made no later than one
              hundred twenty (120) days after the Participant's Retirement Date.

              A new Section 5.01(c) was inserted to read as shown and the prior
              Section 5.01(c) was redesignated as Section 5.01(d). In addition,
              the phrase "Notwithstanding subparagraph (b) above" was deleted
              from the beginning of the first sentence of the new Section
              5.01(d).

              Section 5.02 was amended to include Subsections 5.02(a), (b) and
              (c) as shown. Prior to amendment, Section 5.02 read as follows:

              5.02.   Termination Benefit.

                           (a) A Participant who terminates employment prior to
              retirement or whose designation as an Executive is revoked shall
              receive payment of the Participant's Account balance in accordance
              with the Participant's election on his Benefit Agreement, either
              in monthly payments over three (3) years or as a lump sum
              distribution. If no election is indicated on the Participant's
              Benefit Agreement for termination benefits, the Participant's
              termination benefit shall be paid to him in monthly payments over
              three (3) years beginning no later than one hundred twenty (120)
              days after termination of employment or revocation of designation
              as an Executive. The termination benefit selected by the
              Participant on his Benefit Agreement may be changed at any time by
              the Participant by submitting a new termination election to the
              Committee, but a change shall be effective only if it is received
              by the Committee at least 12 months before payments under the Plan
              commence. The amount of the monthly payments shall be calculated
              to pay out over the three-year period the entire balance in the
              Participant's Account as of his Retirement Date with interest
              credited monthly on the declining balance at the Plan Interest
              Rate. The Participant's Account shall continue to be credited
              monthly with

<PAGE>   37

              interest at the Plan Interest Rate and charged with the monthly
              payments to the Participant. The amount of the monthly payments to
              the Participant shall be adjusted on January 1 of each year to
              reflect changes in the Plan Interest Rate and other changes in the
              Participant's Account balance. After receiving a termination
              benefit, neither the Participant, nor the Participant's
              Beneficiary shall be entitled to any further benefit hereunder.

              A new Section 5.04 was added to read as shown.<PAGE>   1
                                                                   EXHIBIT 10.16

                                MCN ENERGY GROUP

                            SUPPLEMENTAL SAVINGS PLAN

                 (AS RESTATED EFFECTIVE AS OF FEBRUARY 28, 2001)

<PAGE>   2

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

SECTION                                                                                                        PAGE
-------                                                                                                        ----

<S>        <C>                                                                                                 <C>
ARTICLE 1 - TITLE...............................................................................................  1

ARTICLE 2 - DEFINITIONS.........................................................................................  1

ARTICLE 3 - PURPOSE.............................................................................................  1

ARTICLE 4 - EFFECTIVE DATE......................................................................................  2

ARTICLE 5 - PARTICIPATION.......................................................................................  2

            Section 5.1 Eligibility to Participate..............................................................  2
            Section 5.2 Election to Participate.................................................................  2

ARTICLE 6 - PARTICIPANTS' ACCOUNTS..............................................................................  3

            Section 6.1 Establishment of Accounts and Subordination of Executive's
                    Rights......................................................................................  3
            Section 6.2 Credits and Debits to Participants' Accounts............................................  3
            Section 6.3 Election of Accounts....................................................................  4
            Section 6.4 Change of Election for Accounts.........................................................  5
            Section 6.5 Transfers Between Accounts..............................................................  5

ARTICLE 7 - HARDSHIP WITHDRAWALS................................................................................  5

ARTICLE 8 - VESTING AND PAYMENT OF BENEFITS.....................................................................  6

            Section 8.1 Form and Timing of Payments.............................................................  6
            Section 8.2 Change in Payment Options...............................................................  7
            Section 8.3 Revocation of Designation as Executive..................................................  7
            Section 8.4 Payments Subject to Golden Parachute Provisions.........................................  7
            Section 8.5 Vested Portion of Participants' Accounts................................................  7
            Section 8.6 Recrediting of Forfeited Amounts........................................................  7
            Section 8.7 Transfer to an Affiliated Company.......................................................  8

ARTICLE 9 - BENEFICIARY IN THE EVENT OF DEATH...................................................................  8

ARTICLE 10 - ADMINISTRATION.....................................................................................  9

ARTICLE 11 - AMENDMENT AND TERMINATION..........................................................................  9
</TABLE>

                                       i

<PAGE>   3

<TABLE>

<S>          <C>                                                                                               <C>
ARTICLE 12 - MISCELLANEOUS......................................................................................  9

           Section 12.1 Non-Assignability.......................................................................  9
           Section 12.2 No Employment Rights...................................................................  10
           Section 12.3 Law Applicable.........................................................................  10
           Section 12.4 Legal Fees and Expenses................................................................  10
           Section 12.5 Successors.............................................................................  10

ARTICLE 13 - CHANGE IN CONTROL PROVISIONS......................................................................  10

           Section 13.1 General................................................................................  10
           Section 13.2 Transfer to Rabbi Trust................................................................  10
           Section 13.3 Lump Sum Payments......................................................................  11
           Section 13.4 Joint and Several Liability............................................................  11
           Section 13.5 Dispute Procedures.....................................................................  11
           Section 13.6 Definition of Change in Control......................................................... 11
</TABLE>

Historical Background

                                       ii

<PAGE>   4

                                MCN ENERGY GROUP

                            SUPPLEMENTAL SAVINGS PLAN

                 (AS RESTATED EFFECTIVE AS OF FEBRUARY 28, 2001)

         WHEREAS, MCN Energy Group Inc. (the "Company") has previously adopted
the MichCon Supplemental Savings Plan and the Company desires to make certain
changes in the plan.

         NOW, THEREFORE, effective February 28, 2001, the MichCon Supplemental
Savings Plan is hereby amended and restated as follows:

                                    ARTICLE 1

                                      TITLE

         The title of this Plan shall be the "MCN Energy Group Supplemental
Savings Plan" and shall be referred to in this document as the "Plan".

                                    ARTICLE 2

                                   DEFINITIONS

         The words and phrases used in the Plan shall have the same meanings as
provided under Article 2 of the MCN Energy Group Savings and Stock Ownership
Plan (the "Qualified Plan"), as amended from time to time, unless otherwise
defined in the Plan or the context clearly requires otherwise.

                                    ARTICLE 3

                                     PURPOSE

         The principal purpose of the Plan is to provide deferred compensation
for a select group of management or highly compensated Employees of the Company
and any other Employer that has

<PAGE>   5

adopted the Plan with the consent of the Company who has been specifically
designated by the Committee to be eligible for Plan participation (an
"Executive"). Such an employee shall remain an Executive so long as this
designation is not revoked by the Committee.

It is intended that this Plan provide benefits for "a select group of management
or highly compensated employees" within the meaning of Section 201, 301 and 401
of ERISA and, therefore, to be exempt from the provisions of Parts 2, 3, and 4
of Title I of ERISA.

                                    ARTICLE 4

                                 EFFECTIVE DATE

         The original effective date of the Plan for the Company was May 31,
1988, and for any other Employer shall be the date established by such Employer
at the time of adoption of the Plan.

                                    ARTICLE 5

                                  PARTICIPATION

         Section 5.1 Eligibility to Participate. Only the following individuals
shall be eligible to participate in the Plan: (a) any Executive whose
contributions under the Qualified Plan are limited because of the limitation on
compensation under Section 401(a)(17) of the Code, the limitation on elective
deferrals under Section 402(g) of the Code, the limitation on benefits and
contributions under Section 415 of the Code, or any other provision of the Code
or other law that the Committee hereafter designates; and (b) such other
management or highly compensated Employees as shall be approved by the Chief
Executive Officer of an Employer that has adopted the Plan.

         Section 5.2 Election to Participate. An Executive who is eligible to
participate may become a participant in the Plan (a "Participant") by filing a
written election with the Committee on a form approved by the Committee. The
Executive's election shall authorize the Employer to defer the amount of such
Executive's Eligible Compensation pursuant to Section 6.2(a) hereof and shall
evidence the Executive's acceptance of and agreement to all the provisions of
the Plan.

                                       2

<PAGE>   6

         The Executive's election must be made no later than December 31 of the
year that immediately precedes the year for which it applies. However, the first
election by any Executive to participate in this Plan shall be effective for
Eligible Compensation earned after the election is received by the Committee and
after contributions to the Qualified Plan are limited in accordance with Section
5.1(a) above. An election shall be irrevocable for the current calendar year. An
election shall be irrevocable for future calendar years unless a written
revocation is filed with the Committee prior to the first day of the calendar
year for which the revocation is desired.

                                    ARTICLE 6

                             PARTICIPANTS' ACCOUNTS

         Section 6.1 Establishment of Accounts. The Employer shall establish
accounts for each of its Executives who is a Participant in the Plan. Separate
accounts corresponding in name to the separate funds under the Qualified Plan
shall be maintained for each Participant. Credits under Sections 6.2(a) and (b)
shall also be maintained in separate accounts. The accounts shall be maintained
as unfunded bookkeeping accounts and all amounts represented by the accounts
shall remain a part of the general funds of the Employer of such Participant,
subject to the claims of its general creditors. Nothing in the Plan and no
action taken pursuant to the provisions of the Plan shall be deemed to create a
trust or fund of any kind or to create any fiduciary relationship. The
obligation to make payments under this Plan shall be and remain an unsecured,
unfunded general obligation of the Employer of the particular Participant. Each
Executive who is a Participant in the Plan shall be provided an annual statement
of the unfunded accounts maintained for the Participant.

         Section 6.2 Credits and Debits to Participants' Accounts. As of the end
of a pay period, total credits shall be made to the accounts maintained for a
Participant as set forth below:

         (a)      An amount equal to the difference between (1) and (2) below:

                           (1) the amount that such Participant would have
                  contributed to the Qualified Plan for such pay period,
                  assuming (x) the Participant satisfied the eligibility
                  requirements set forth in Section 3.1 of the Qualified Plan
                  and (y) the allotments of

                                       3

<PAGE>   7

                  such Participant under the Qualified Plan were not limited by
                  the application of the any restriction set forth in Section
                  5.1(a), or any provision of the Qualified Plan relating to the
                  limitations described in Section 5.1(a) above;

                           (2) the amount that such Participant actually
                  contributed to the Qualified Plan for such pay period.

         (b)      An amount equal to the difference between (1) and (2) below:

                           (1) the amount that the Employer of such Participant
                  would have contributed to the Qualified Plan on behalf of such
                  Participant for such pay period if the Participant had
                  contributed the amount set forth in (a)(1) above to the
                  Qualified Plan during such pay period;

                           (2) the amount that the Employer actually contributed
                  to the Qualified Plan on behalf of such Participant for such
                  pay period.

         The total credits under (a) and (b) of this Section shall be allocated
to the specific accounts elected by the Participant as provided under Section
6.3 hereof. Each account shall be credited with an amount representing earnings
or debited with an amount representing losses on a daily basis. Earnings or
losses for a pay period shall be calculated using the daily valuation
methodology employed by the recordkeeper for each corresponding fund under the
Qualified Plan.

         Section 6.3 Election of Accounts. Each Participant shall, by filing a
written election with the Committee, on a form approved by the Committee, elect
the accounts which are to be used for recording credits under Sections 6.2(a)
and (b) hereof.

         A Participant may direct that credits under Sections 6.2(a) and (b) may
be made to any account corresponding in name to the funds under the Qualified
Plan that are available to accept contributions or allotments. Notwithstanding
the foregoing, a Participant must at all times maintain an aggregate balance in
the MCN Stock fund in the Qualified Plan or the MCN Stock account in this Plan
or a combination of both such plans in an amount at least equal to the sum of
the Employer contributions made pursuant to Section 4.3(a) of the Qualified Plan
after April 1, 1989,

                                       4

<PAGE>   8

plus seventy-five percent of the credits recorded under Section 6.2(b) of this
Plan (or the corresponding Predecessor provision) after April 1, 1989. This
balance may be maintained in the Qualified Plan, this Plan, or a combination of
both such plans, at the discretion of the Participant.

         Section 6.4 Change of Election for Accounts. Any election of accounts
given by a Participant under the preceding Section shall be deemed to be a
continuing election until changed by the Participant. A Participant may change
any such election as of any normal business day of any month by giving prior
notice of such change to the Plan recordkeeper in the form prescribed by the
Committee.

         Section 6.5 Transfers Between Accounts. Transfers between accounts
shall be effected on any normal business day of any month upon directions to the
Plan recordkeeper in the form prescribed by the Committee.

         A Participant may not transfer any amount from the MCN Stock account if
the balance remaining in such account after the transfer would be less than the
amount required to be credited to such account under Section 6.3 hereof, plus
the earnings thereon.

                                    ARTICLE 7

                              HARDSHIP WITHDRAWALS

         A Participant may request, upon 20 days written notice to the
Committee, a withdrawal from his or her accounts if the withdrawal is on account
of financial hardship as defined under the Qualified Plan. A financial hardship
shall first be satisfied from the MCN Executive Deferred Compensation Plan to
the extent possible; then from the Plan; and finally from the Qualified Plan.
The amount of such withdrawal shall be limited to the amounts deferred under
Section 6.2(a) hereof, or the total value of the accounts maintained under
Section 6.2(a) hereof as of the end of the prior month, whichever is smaller.

                                       5

<PAGE>   9

         The determination of the existence of financial hardship and the amount
required to be distributed to meet the need created by the hardship shall be
made by the Committee. All determinations regarding financial hardship shall be
made in accordance with written procedures established by the Committee for
hardship withdrawals from the Qualified Plan and shall be applied in a uniform
and nondiscriminatory manner. Such written procedures shall specify the
requirements for requesting and receiving withdrawals on account of financial
hardship, including the forms that must be submitted, and to whom the forms are
to be submitted. No other withdrawals or loans are permitted under this Plan.

                                    ARTICLE 8

                         VESTING AND PAYMENT OF BENEFITS

         Section 8.1 Form and Timing of Payment. On the date that a Participant
becomes entitled, pursuant to either Section 9.1 or 9.2 of the Qualified Plan
(the "Retirement Date"), to a distribution of his or her account in the
Qualified Plan, such Participant shall be entitled to receive the vested portion
of the amount credited to his or her accounts in the Plan. All distributions
shall be paid out at the end of the quarter in which the Participant's
Retirement Date occurs. As of the end of the quarter in which his Retirement
Date occurs, the Participant's Account shall be valued on a cash basis with
interest credited annually at a rate equal to the average interest rate of
ten-year U.S. Treasury Notes for the November of the prior calendar year, or
such other rate as set by the Committee (the "Plan Interest Rate").

Payment of the vested portion of a Participant's accounts shall be made in
accordance with the Participant's selection on his Benefit Agreement either in
annual payments over a period not less than one year and not more than 15 years,
or in one lump sum by the Employer maintaining the accounts. If no payment
election has been made, the vested portion of the Participant's account shall be
paid in one lump sum. In addition, if a Participant's Account is less than or
equal to $5,000 as of the end of the quarter in which his Retirement Date
occurs, the Participant's Account shall be paid in one lump sum.

                                       6

<PAGE>   10

The amount of the annual payments shall be calculated to pay out over the
specified period the entire balance in the Participant's Account as of his
Retirement Date with interest credited annually on the declining balance at the
Plan Interest Rate. The Participant's Account shall continue to be credited
annually with interest at the Plan Interest Rate and charged with the annual
payments to the Participant. The amount of the annual payments to the
Participant shall be adjusted at the end of the quarter in which the anniversary
of the Participant's retirement date occurs to reflect changes in the Plan
Interest Rate and other changes in the Participant's Account balance.

         Section 8.2 Change in Payment Option. The payment option selected by
the Participant may be changed at any time by the Participant submitting a new
payment selection to the Committee. However, any change received by the
Committee less than twelve months prior to the Participant;s Retirement Date
shall post-pone any distribution from the Plan until a period of twelve months
has elapsed.

         Section 8.3 Revocation of Designation as Executive. A Participant whose
designation as an Executive is revoked prior to the Participant's retirement,
death, termination or disability shall not be permitted to continue to make
Deferrals under the Plan subsequent to the date of such revocation. However, the
vested portion of the Participant's Account as of the date of revocation shall
be transferred to and governed by the MCN Energy Group Executive Compensation
Plan (The Deferred Comp Plan) or any successor of the Deferred Comp Plan.

         SECTION 8.4 Payments Subject to Golden Parachute Provisions.
Notwithstanding the above, if payment at the time specified in the first
sentence of this paragraph would subject the Participant to the excise tax under
Section 4999 of the Code, payment of the vested portion of a Participant's
accounts shall be deferred until the earlier of (a) the date that would have
been the Participant's Normal Retirement Date, Early Retirement Date or
Disability Retirement Date, (b) death of the Participant, or (c) total and
permanent disability or legally established mental incompetency of the
Participant.

                                       7

<PAGE>   11

         Section 8.5 Vested Portion of Participants' Accounts. The vested
portion of a Participant's account shall mean: (i) the total value of the
accounts of a Participant who is entitled to a distribution pursuant to Section
9.1 of the Qualified Plan; or (ii) with respect to a Participant who is entitled
to a distribution pursuant to Section 9.2 of the Qualified Plan, the total value
of the account maintained under Section 6.2(a) hereof. Notwithstanding the
foregoing, the total value of the accounts of a Participant shall become
nonforfeitable as of the date on which the Participant attains age 65.

         Section 8.6 Recrediting of Forfeited Amounts. If a Participant entitled
to a distribution pursuant to Section 9.2 of the Qualified Plan receives the
vested portion of the amount credited to his or her accounts in the Plan,
forfeits the remainder, and is thereafter reemployed prior to incurring five
consecutive Break in Service Years, then as of the end of the month coincident
with or next following the Participant's date of reemployment, the amount of the
Participant's accounts that was forfeited upon the earlier termination of
employment shall be credited to the Participant's accounts. Interest shall not
accrue on such amount between the time it was forfeited and the time at which it
was recredited.

         Section 8.7 Transfer to an Affiliated Company. Benefits for a
Participant who transfers employment from one Employer to an Affiliated Company
shall be subject to Section 3.8 of the Qualified Plan. Such a transfer of
employment shall cause a transfer of the accounts maintained by an Employer for
a Participant if the new Employer has adopted the Plan and the former Employer
transfers cash to the new Employer equal to the amount of the accounts
transferred. In all other events, a transfer of employment shall not cause a
transfer of the accounts maintained by an Employer for a Participant.

                                    ARTICLE 9

                        BENEFICIARY IN THE EVENT OF DEATH

                                       8

<PAGE>   12

         Each Participant shall have the right to designate a beneficiary or
beneficiaries to receive any distribution to be made under Article 8 upon the
death of such Participant, or, in the case of a Participant who dies subsequent
to termination of his or her employment but prior to the distribution of the
entire amount to which the Participant is entitled under the Plan, any
undistributed balance to which such Participant would have been entitled. Each
Participant shall also have the right to designate a contingent beneficiary in
the event any of the primary beneficiaries predecease the Participant or die
prior to complete disbursement of the Participant's account.

         If no beneficiary has been named by a Participant at the time of the
Participant's death, or if the beneficiary designated by the Participant has
predeceased the Participant or such designated beneficiary has died prior to
complete disbursement of the Participant's accounts and the Participant has
failed to name a contingent beneficiary, the value of the Participant's
accounts, or the undistributed portion thereof, shall be paid by the Employer to
the deceased employee's lawful successor(s) in interest in a lump sum as soon as
practicable, but in no event later than one year following the employee's death.

                                   ARTICLE 10

                                 ADMINISTRATION

         The Plan shall be administered by the Committee appointed pursuant to
the provisions of Section 10.1 of the Qualified Plan. The Committee shall have
the same powers and duties, and shall be subject to the same limitations, as are
described in the Qualified Plan. However, unlike the limitation on the
Committee's power to amend or modify the Qualified Plan under Section 11.1 of
the Qualified Plan, the Committee shall have full power to amend or modify the
Plan in all respects.

                                   ARTICLE 11

                            AMENDMENT AND TERMINATION

         The Company may amend or terminate the Plan at any time and for any
reason. The power to amend or modify the Plan shall rest solely with the
Committee. No such amendment or

                                       9

<PAGE>   13

termination shall affect the rights of Participants or beneficiaries to the
vested portion of amounts credited to Participants' accounts as of the date of
such amendment or termination. In the event of a termination of the Plan, all
amounts credited to a Participant's accounts shall be fully vested.

                                   ARTICLE 12

                                  MISCELLANEOUS

         12.1 Non-Assignability. This Plan shall be subject to the same terms
and conditions as specified in Section 15.4 of the Qualified Plan, and said
Section is hereby incorporated by reference.

         Section 12.2 No Employment Rights. Nothing contained in the Plan and no
action taken pursuant to the provisions of the Plan shall be construed as a
contract of employment between the Employer and an Employee, or as a right of
any Employee to be continued in the employment of the Employer, or as a
limitation of the right of the Employer to discharge any of its Employees at any
time, with or without cause, or as a limitation of the right of the Employee to
terminate employment at any time.

         Section 12.3 Law Applicable. This Plan and all actions hereunder shall
be governed by and construed according to the laws of the State of Michigan.

         Section 12.4 Legal Fees and Expenses. The Company shall pay all legal
fees and expenses which a Participant may incur as a result of the Company
contesting the validity, enforceability, or the Participant's interpretation of,
or determinations under this Plan other than the hardship withdrawal provisions
hereof.

         Section 12.5 Successors. In the event of any consolidation, merger,
acquisition or reorganization of the Company, the obligations of the Company
under this Plan shall continue and be binding upon the Company and its
successors.

                                       10

<PAGE>   14

                                   ARTICLE 13

                          CHANGE IN CONTROL PROVISIONS

         Section 13.1 General. In the event of a Change in Control, as defined
in Section 13.6, then, notwithstanding any other provision of the Plan, the
provisions of this Section 13 shall be applicable and shall supersede any
conflicting provisions of the Plan.

         Section 13.2 Transfer to Rabbi Trust. MCN Energy Group Inc. ("MCN") has
established a trust pursuant to a Trust Agreement dated January 3, 1991 (the
"Rabbi Trust"). The terms of the Rabbi Trust provide that, in the event of a
Change in Control and thereafter, assets are to be transferred to such trust to
provide benefits under the Plan. MCN shall make all transfers of funds required
by the Rabbi Trust in a timely manner and shall otherwise abide by the terms of
the Rabbi Trust.

         Section 13.3 Lump Sum Payments. In a Change in Control situation, the
Chairman of MCN shall have the absolute discretion to direct that a lump sum
payment be made to a Participant up to the total value of such Participant's
Account in the year of the Change in Control if such payment will reduce the
amount of any potential excise tax imposed by Code Section 4999.

         Section 13.4 Joint and Several Liability. Upon and at all times after a
Change in Control, the liability under the Plan of MCN and each Affiliated
Employer that has adopted the Plan shall be joint and several so that MCN and
each such Affiliated Employer shall each be liable for all obligations under the
Plan to each employee covered by the Plan, regardless of the corporation by
which such employee is employed.

                                     11

<PAGE>   15

         Section 13.5 Dispute Procedures. In the event that, upon or at any time
subsequent to a Change in Control, a claim for benefits under the Plan of a
Participant or distributee who has exhausted the claims and appeals procedures
set forth in Section 10.6 of the Qualified Plan is denied in whole or in part,
the following additional procedures shall be applicable:

                  (a) Any amount that is not in dispute shall be paid to the
         Participant or distributee at the time or times provided herein.

                  (b) MCN shall advance to such claimant from time to time such
         amounts as shall be required to reimburse the claimant for reasonable
         legal fees, costs and expenses incurred by such claimant in seeking a
         judicial resolution of his or her claim, including reasonable fees,
         costs and expenses relating to appeals; provided, however, that MCN
         shall not be obligated to advance to the claimant any amounts under
         this Section 13.4(b) unless and until the claimant agrees in writing to
         repay to MCN, immediately upon the occurrence of a final judicial
         determination with respect to such dispute, any amount of such fees,
         costs and expenses that is not awarded to such claimant in a final
         order of a court of competent jurisdiction.

         Section 13.6  Definition of Change in Control.  A "Change of Control"
 means:

                  (a) The acquisition by any individual, entity or group (within
         the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange
         Act of 1934, as amended (the "Exchange Act")) (a "Person") of
         beneficial ownership (within the meaning of Rule 13d-3 promulgated
         under the Exchange Act) of 20% or more of either (i) the then
         outstanding shares of common stock of MCN (the "Outstanding MCN Common
         Stock") or (ii) the combined voting power of the then outstanding
         voting securities of MCN entitled to vote generally in the election of
         directors (the "Outstanding MCN Voting Securities"); provided, however,
         that the following acquisitions shall not constitute a Change of
         Control: (A) any acquisition directly from MCN (excluding any
         acquisition by virtue of the exercise of a conversion

                                       12

<PAGE>   16

         privilege), (B) any acquisition by MCN, (C) any acquisition by any
         employee benefit plan (or related trust) sponsored or maintained by MCN
         or any corporation controlled by MCN or (D) any acquisition by any
         corporation pursuant to a reorganization, merger or consolidation, if,
         following such reorganization, merger or consolidation, the conditions
         described in clauses (i), (ii) and (iii) of subsection (c) of this
         Section 13.6 are satisfied; or

                  (b) Individuals who, as of the date hereof, constitute the
         Board of Directors of MCN (the "Incumbent Board") cease for any reason
         to constitute at least a majority of the Board; provided, however, that
         any individual becoming a director subsequent to the date hereof whose
         election, or nomination for election by MCN's shareholders, was
         approved by a vote of at least a majority of the directors then
         comprising the Incumbent Board shall be considered as though such
         individual were a member of the Incumbent Board, but excluding, for
         this purpose, any such individual whose initial assumption of office
         occurs as a result of either an actual or threatened election contest
         (as such terms are used in Rule 14a-11 of Regulation 14A promulgated
         under the Exchange Act) or other actual or threatened solicitation of
         proxies or consents by or on behalf of a Person other than the Board;
         or

                  (c) Approval by the shareholders of MCN of a reorganization,
         merger or consolidation, in each case, unless, following such
         reorganization, merger or consolidation, (i) more than 60% of,
         respectively, the then outstanding shares of common stock of the
         corporation resulting from such reorganization, merger or consolidation
         and the combined voting power of the then outstanding voting securities
         of such corporation entitled to vote generally in the election of
         directors is then beneficially owned, directly or indirectly, by all or
         substantially all of the individuals and entities who were the
         beneficial owners, respectively, of the Outstanding MCN Common Stock
         and Outstanding MCN Voting Securities immediately prior to such
         reorganization, merger or consolidation in substantially the same
         proportions as their ownership, immediately prior to such
         reorganization,

                                       13

<PAGE>   17

         merger or consolidation, of the Outstanding MCN Common Stock and
         Outstanding MCN Voting Securities, as the case may be, (ii) no Person
         (excluding MCN, any employee benefit plan or related trust sponsored or
         maintained by MCN or any corporation controlled by MCN or such
         corporation resulting from such reorganization, merger or consolidation
         and any Person beneficially owning, immediately prior to such
         reorganization, merger or consolidation, directly or indirectly, 20% or
         more of the Outstanding MCN Common Stock or Outstanding MCN Voting
         Securities, as the case may be) beneficially owns, directly or
         indirectly, 20% or more of, respectively, the then outstanding shares
         of common stock of the corporation resulting from such reorganization,
         merger or consolidation or the combined voting power of the then
         outstanding voting securities of such corporation entitled to vote
         generally in the election of directors and (iii) at least a majority of
         the members of the board of directors of the corporation resulting from
         such reorganization, merger or consolidation were members of the
         Incumbent Board at the time of the execution of the initial agreement
         providing for such reorganization, merger or consolidation; or

                  (d) Approval by the shareholders of MCN of (i) a complete
         liquidation or dissolution of MCN or (ii) the sale or other disposition
         of all or substantially all of the assets of MCN, other than to a
         corporation, with respect to which following such sale or other
         disposition, (A) more than 60% of, respectively, the then outstanding
         shares of common stock of such corporation and the combined voting
         power of the then outstanding voting securities of such corporation
         entitled to vote generally in the election of directors is then
         beneficially owned, directly or indirectly, by all or substantially all
         of the individuals and entities who were the beneficial owners,
         respectively, of the Outstanding MCN Common Stock and Outstanding MCN
         Voting Securities immediately prior to such sale or other disposition
         in substantially the same proportion as their ownership, immediately
         prior to such sale or other disposition, of the Outstanding MCN Common
         Stock and Outstanding MCN Voting Securities, as the case may be, (B) no
         Person (excluding MCN Corporation,

                                       14

<PAGE>   18

         any employee benefit plan or related trust sponsored or maintained by
         MCN or any corporation controlled by MCN or such corporation resulting
         from such reorganization, merger or consolidation and any Person
         beneficially owning, immediately prior to such sale or other
         disposition, directly or indirectly, 20% or more of the Outstanding MCN
         Common Stock or Outstanding MCN Voting Securities, as the case may be)
         beneficially owns, directly or indirectly, 20% or more of,
         respectively, the then outstanding shares of common stock of such
         corporation and the combined voting power of the then outstanding
         voting securities of such corporation entitled to vote generally in the
         election of directors and (C) at least a majority of the members of the
         board of directors of such corporation were members of the Incumbent
         Board at the time of the execution of the initial agreement or action
         of the Board providing for such sale or other disposition of assets of
         MCN.

         IN WITNESS WHEREOF, the undersigned officer of the Company has executed
this Plan as of this 28th day of February 2001.

                              MCN ENERGY GROUP INC.

                              By:
                                  ---------------------------------------------
                                    Daniel L. Schiffer, Senior Vice President,
                                    General Counsel and Secretary

                                       15

<PAGE>   19

                              MCN ENERGY GROUP INC.
                            SUPPLEMENTAL SAVINGS PLAN

                              Historical Background

07/01/89          Plan amended and restated.

02/28/90          MCN Corporation Minutes of Regular Meeting of Board of
                  Directors - authorization for amendment regarding "Change in
                  Control" language (Section 13).

08/01/91          Plan amended and restated per MCN Corporation Minutes of
                  Regular Meeting of Board of Directors - authorization for
                  amendment providing participants the option of receiving
                  essentially the same returns as available under the MichCon
                  Savings Plan, to require that participants maintain at least
                  75% of the employer matching portion in the Corporation's
                  common stock, and to conform the hardship withdrawal
                  provisions to new Treasury Regulations.

01/01/92          Amendment to Section 5.3, inserting at the end of Section 5.3
                  "and, when the Qualified Plan is amended to permit increased
                  Voluntary Deductions or Salary Reduction a change submitted
                  prior to the effective date of such amendments."

08/15/92          Plan restated.

01/01/97          Plan amended and restated per MCN Corporation Minutes of
                  Regular Meeting of Board of Directors as follows:

                  Article 1 is  amended  to reflect  the  change in the name of
                  the Plan to the "MCN  Energy  Group Inc. Supplemental Savings
                  Plan".

                  Article 3 is amended to read as follows:

                          The principal purpose of the Plan is to provide
                          deferred compensation for a select group of
                          management or highly compensated Employees of the
                          Company and any other Employer that has adopted the
                          Plan with the consent of the Company who has been
                          specifically designated by the Committee to be
                          eligible for Plan participation (an "Executive").
                          Such an employee shall remain an Executive so long as
                          this designation is not revoked by the Committee.

                          It is intended that this Plan provide benefits for "a
                          select group of management or highly compensated
                          employees" within the meaning of Section 201, 301 and
                          401 of ERISA and, therefore, to be exempt from the
                          provisions of Parts 2, 3, and 4 of Title I of ERISA.

                  Section 5.3 is amended to read as follows:
                          Section 5.3 Restriction on Change Deferrals Under the
                          Plan. The amount to be deferred by an Executive for a
                          Plan year shall be

<PAGE>   20

                          determined using the percentage of his or her
                          Compensation Rate in effect as of the December 31 of
                          the year which immediately precedes the year for
                          which it applies. An Executive who elects to
                          participate in the Plan may not, after the effective
                          date of such election, change the percentage of his
                          or her Compensation Rate deferred under the Qualified
                          Plan to affect the amount to be deferred under the
                          Plan except for a change submitted prior to the first
                          day of the calendar year for which the change is
                          desired, and, when the Qualified Plan is amended to
                          permit increased Voluntary Reductions or Salary
                          Reductions and such change is submitted prior to the
                          effective date of such amendments. Any such other
                          change in the percentage of his or her Compensation
                          Rate deferred under the Qualified Plan shall be
                          ignored for deferral purposes under the Plan.

                  The heading of Section 6.1 is amended to read as follows:

                          Section 6.1 Establishment of Accounts and
                          Subordination of Executive's Rights.

                  Section 6.2 is amended to move the first paragraph to the end
                  of the section and to add a subparagraph (c) as follows:

                                    (c) An amount of compensation equal to the
                                    distribution of dividends on the MCN Stock
                                    held in a Participant's Plan Account under
                                    the Qualified Plan to the extent the
                                    Executive has not elected or was ineligible
                                    to make Additional Allotments and the
                                    Executive has elected to contribute such
                                    amount to the Plan.

                                    The total credits under (a) and (b) of this
                           Section shall be allocated to the specific accounts
                           elected by the Participant as provided under Section
                           6.3 hereof. The credits under (c) of the Section
                           shall be allocated to the MCN Stock account in the
                           Plan

                  Section 6.4 is amended as follows:

                           Any election of accounts given by a Participant under
                           the preceding Section shall be deemed to be a
                           continuing election until changed by the Participant.
                           A Participant may change any such election as of any
                           normal business day of any month by giving prior
                           notice of such change to the Plan recordkeeper in the
                           form prescribed by the Committee.

                  Article 7 is amended to add the following after the first
                           sentence in the article:

<PAGE>   21

                           A financial hardship shall be satisfied from the MCN
                           Executive Deferred Compensation Plan to the extent
                           possible; then from the Plan; and finally from the
                           Qualified Plan.

                  Article 8 is amended to divide the information into sections
                           as follows:

                                    Section 8.1 Form and Timing of Payment. On
                           the date that a Participant becomes entitled,
                           pursuant to either Section 9.1 or 9.2 of the
                           Qualified Plan (the "Retirement Date"), to a
                           distribution of his or her account in the Qualified
                           Plan, such Participant shall be entitled to receive
                           the vested portion of the amount credited to his or
                           her accounts in the Plan commencing on the first of
                           the month following the month in which his Retirement
                           Date occurs. As of the first of the month following
                           the month in which his Retirement Date occurs, the
                           Participant's Account shall be valued on a cash basis
                           with interest credited monthly at a rate equal to the
                           interest rate for the latest issue, as of the end of
                           the previous month, of ten-year U.S. Treasury Notes,
                           or such other rate as set by the Committee (the "Plan
                           Interest Rate"). Payment of the vested portion of a
                           Participant's accounts shall be made in accordance
                           with the Participant's selection on his Benefit
                           Agreement either in monthly payments in one-year
                           increments, not to exceed 15 years, or in one lump
                           sum by the Employer maintaining the accounts. The
                           amount of the monthly payments shall be calculated to
                           pay out over the specified period the entire balance
                           in the Participant's Account as of his Retirement
                           Date with interest credited monthly on the declining
                           balance at the Plan Interest Rate. The Participant's
                           Account shall continue to be credited monthly with
                           interest at the Plan Interest Rate and charged with
                           the monthly payments to the Participant. The amount
                           of the monthly payments to the Participant shall be
                           adjusted on January 1 of each year to reflect changes
                           in the Plan Interest Rate and other changes in the
                           Participant's Account balance.

                                    Section 8.2. Change in Payment Option. The
                           payment option selected by the Participant may be
                           changed at any time by the Participant submitting a
                           new payment selection to the Committee, by a change
                           shall be effective only if it is received by the
                           Committee at least 12 months before payments under
                           the Plan commence.

                                    Section 8.3 Payments Subject to Golden
                           Parachute Provisions. Notwithstanding the above, if
                           payment at the time specified in the first sentence
                           of this paragraph would subject the Participant to
                           the excise tax under Section 4999 of the Code,
                           payment of the vested portion of a Participant's
                           accounts shall be deferred until the earlier of (a)
                           the date that would have been the Participant's
                           Normal Retirement Date, Early Retirement Date or
                           Disability Retirement Date, (b) death of the
                           Participant, or (c) total and permanent disability or
                           legally established mental incompetency of the
                           Participant.

<PAGE>   22

                                    Section 8.4 Vested Portion of Participants'
                           Accounts. The vested portion of a Participant's
                           accounts shall mean: (i) the total value of the
                           accounts of a Participant who is entitled to a
                           distribution pursuant to Section 9.1 of the Qualified
                           Plan; or (ii) with respect to a Participant who is
                           entitled to a distribution pursuant to Section 9.2 of
                           the Qualified Plan, the total value of the accounts
                           maintained under Sections 6.2(a) and (c) hereof.
                           Notwithstanding the foregoing, the total value of the
                           accounts of a Participant shall become nonforfeitable
                           as of the date on which the Participant attains age
                           65.
                                    Section 8.5 Recrediting of Forfeited
                           Amounts. If a Participant entitled to a distribution
                           pursuant to Section 9.2 of the Qualified Plan
                           receives the vested portion of the amount credited to
                           his or her accounts in the Plan, forfeits the
                           remainder, and is thereafter reemployed prior to
                           incurring five consecutive Break in Service Years,
                           then as of the end of the month coincident with or
                           next following the Participant's date of
                           reemployment, the amount of the Participant's
                           accounts that was forfeited upon the earlier
                           termination of employment shall be credited to the
                           Participant's accounts. Interest shall not accrue on
                           such amount between the time it was forfeited and the
                           time at which it was recredited.

                                    Section 8.6 Transfer to an Affiliated
                           Company. Benefits for a Participant who transfers
                           employment from one Employer to an Affiliated Company
                           shall be subject to Section 9.7(c) of the Qualified
                           Plan. Such a transfer of employment shall cause a
                           transfer of the accounts maintained by an Employer
                           for a Participant if the new Employer has adopted the
                           Plan and the former Employer transfers cash to the
                           new Employer equal to the amount of the accounts
                           transferred. In all other events, a transfer of
                           employment shall not cause a transfer of the accounts
                           maintained by an Employer for a Participant.

                  Article 10 is amended as follows:

                           The Plan shall be administered by the Committee
                           appointed pursuant to the provisions of Section 10.1
                           of the Qualified Plan. The Committee shall have the
                           same powers and duties, and shall be subject to the
                           same limitations, as are described in the Qualified
                           Plan. However, unlike the limitation on the
                           Committee's power to amend or modify the Qualified
                           Plan under Section 11.1 of the Qualified Plan, the
                           Committee shall have full power to amend or modify
                           the Plan in all respects.

                  Articles 12 and 13 are amended to update the references to the
                  sections in the Qualified Plan and to delete "Corporation"
                  after "MCN" in all cases after the term MCN has been defined.

<PAGE>   23

11/29/99          Plan amended and restated as of 1/1/98 as follows:

                  Section 5.3 is deleted in its entirety. Prior to deletion,
                  previous Section 5.3 read as follows:

                                     Section 5.3 Restriction on Change of
                           Deferrals Under the Plan. The amount to be deferred
                           by an Executive for a Plan year shall be determined
                           using the percentage of his or her Compensation Rate
                           in effect as of the December 31 of the year which
                           immediately precedes the year for which it applies.
                           An Executive who elects to participate in the Plan
                           may not, after the effective date of such election,
                           change the percentage of his or her Compensation Rate
                           deferred under the Qualified Plan to affect the
                           amount to be deferred under the Plan, except for a
                           change submitted prior to the first day of the
                           calendar year for which the change is desired, and,
                           when the Qualified Plan is amended to permit
                           increased Voluntary Reductions or Salary Reductions
                           and such change is submitted prior to the effective
                           date of such amendments. Any such other change in the
                           percentage of his or her Compensation Rate deferred
                           under the Qualified Plan shall be ignored for
                           deferral purposes under the Plan.

                  Section 6.2(a) is amended to delete reference to all of the
                  limitations listed in Section 5.1 and merely references
                  Section 5.1.

                  Section 6.2(c) is deleted in its entirety. Prior to deletion,
                  previous Section 6.2(c) read as follows:

                  An amount equal to the distribution of dividends on the MCN
                           Stock held in a Participant's Plan Account under
                           the Qualified Plan to the extent the Executive has
                           not elected or was ineligible to make Additional
                           Allotments and the Executive has elected to
                           contribute such amount to the Plan.

                  The last sentence of the first paragraph of the flush language
                  in Section 6.2 is deleted. Prior to deletion the sentence read
                  as follows:

                                    The credits under (c) of this Section shall
                           be allocated to the MCN Stock account in this Plan.

                  The second to last sentence of the second paragraph of Article
                  7 is deleted. Prior to deletion, the sentence read as follows:

                                    If a Participant receives a hardship
                           withdrawal from this Plan or from the Qualified Plan,
                           no amounts may be credited to the Participant's
                           accounts under Section 6.2(a) or (b) for a period of
                           twelve months after receipt of the hardship
                           withdrawal.

<PAGE>   24

                  Section 8.1 was amended to read as currently shown. Prior to
                  amendment, Section 8.1 read as follows:

                                     Section 8.1 Form and Timing of Payment. On
                           the date that a Participant becomes entitled,
                           pursuant to either Section 9.1 or 9.2 of the
                           Qualified Plan (the "Retirement Date"), to a
                           distribution of his or her account in the Qualified
                           Plan, such Participant shall be entitled to receive
                           the vested portion of the amount credited to his or
                           her accounts in the Plan commencing on the first of
                           the month following the month in which his Retirement
                           Date occurs. As of the first of the month following
                           the month in which his Retirement Date occurs, the
                           Participant's Account shall be valued on a cash basis
                           with interest credited monthly at a rate equal to the
                           interest rate of ten-year U.S. Treasury Notes, or
                           such other rate as set by the Committee (the "Plan
                           Interest Rate"). Payment of the vested portion of a
                           Participant's accounts shall be made in accordance
                           with the Participant's selection on his Benefit
                           Agreement either in monthly payments in one-year
                           increments not to exceed 15 years, or in one lump sum
                           by the Employer maintaining the accounts. The amount
                           of the monthly payments shall be calculated to pay
                           out over the specified period the entire balance in
                           the Participant's Account as of his Retirement Date
                           with interest credited monthly on the declining
                           balance at the Plan Interest Rate. The Participant's
                           Account shall continue to be credited monthly with
                           interest at the Plan Interest Rate and charged with
                           the monthly payments to the Participant. The amount
                           of the monthly payments to the Participant shall be
                           adjusted on January 1 of each year to reflect changes
                           in the Plan Interest Rate and other changes in the
                           Participant's Account balance.

                  Section 8.4 is amended to delete "and (c) hereof" at the end
                  of the first sentence.

                  The election and beneficiary designation forms are revised to
                  read as follows:

<PAGE>   25

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN

                             DEFERRAL ELECTION FORM

<TABLE>

<S>                                                     <C>                             <C>             <C>
============================================================================================================================
Employee Name (Print)                                    Social Security No.                            I. D. Number

----------------------------------------------------------------------------------------------------------------------------
Address (Number/Street)                                  City                            State          Zip Code

============================================================================================================================
</TABLE>
Deferral Election

[ ]    In accordance with the terms of the MCN Energy Group Supplemental
       Savings Plan ("Plan") which is hereby incorporated by reference, I
       hereby accept and agree to all the provisions of the Plan and
       irrevocably elect pursuant to Section 5.2 of the Plan to defer a
       portion of my compensation pursuant to Section 6.2 of the Plan.

[ ]    I elect NOT to participate in the MCN Energy Group Supplemental Savings
       Plan.

Payment Election

I elect to have the amount I have deferred paid to me after termination of my
employment with the Company and its subsidiaries by reason of retirement,
disability, or death, in the manner specified below:

[ ]    Lump-sum payment.

[ ]    Payment in annual installments over _____ years (in one year increments,
       not to exceed 15 years).

I understand that if I fail to make a payment election, my MCN Energy Group
Supplemental Savings Plan account balance will be paid in a lump sum at the end
of the quarter in which my Retirement Date (as defined in Section 8.1) occurs.

I understand that, in addition to the above payment, I may be eligible for a
hardship withdrawal pursuant to Article 7 of the Plan.

<TABLE>

<S>                                                <C>                                  <C>
============================================================================================================================
Employee Signature                                                                       Date

----------------------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                            Title                                 Date

============================================================================================================================
</TABLE>

<PAGE>   26

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN

                          BENEFICIARY DESIGNATION FORM
<TABLE>

<S>                                                     <C>                             <C>             <C>
============================================================================================================================
Employee Name (Print)                                    Social Security No.                            I. D. Number

----------------------------------------------------------------------------------------------------------------------------
Address (Number/Street)                                  City                            State          Zip Code

============================================================================================================================
</TABLE>

I hereby designate, pursuant to Article 9 of the above-referenced plan, the
below-designated person(s) as my beneficiary in the event of my death:

<TABLE>

<S>                                                     <C>
============================================================================================================================
Beneficiary's Name                                              Address

----------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------
</TABLE>

I UNDERSTAND THAT THE DESIGNATION OF A BENEFICIARY OTHER THAN MY SPOUSE MUST BE
CONSENTED TO IN WRITING BY MY SPOUSE.

In the event any of the above-named beneficiaries should predecease me, or shall
survive me but die before receiving all amounts to be paid, I hereby name the
following as a contingent beneficiary to receive any such unpaid amounts:

<TABLE>

<S>                                                             <C>
============================================================================================================================
Beneficiary's Name                                              Address

----------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------
</TABLE>

In the event none of the above-named beneficiaries survive me, any unpaid
amounts shall be paid to my lawful successor in interest. I reserve the right to
change this beneficiary designation at any time by filing with the Committee or
its Designee a new beneficiary designation form.

I UNDERSTAND THAT MY MOST RECENT ELECTION AS TO THE BENEFICIARY DESIGNATION WILL
APPLY TO ALL DEFERRALS BY ME UNDER THE PLAN.

<TABLE>

<S>                                               <C>                 <C>                <C>
============================================================================================================================
Employee Signature                                                                        Date

----------------------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                            Title                                  Date

============================================================================================================================
</TABLE>

SPOUSAL CONSENT:  I HEREBY CONSENT TO THE DESIGNATION OF BENEFICIARY SET FORTH
HEREIN.

<TABLE>

<S>                                                                 <C>
============================================================================================================================
Spouse's Signature                                                     Date

----------------------------------------------------------------------------------------------------------------------------
Witness                                                                Date

============================================================================================================================
</TABLE>

<PAGE>   27

12/15/99    The Plan was amended and restated as of December 15, 1999 to reflect
            the following changes:

            New Section 12.5 was added to read as shown.

            Sections 13.3, 13.4 and 13.5 were redesignated as Sections 13.4,
            13.5 and 13.6, respectively. A new Section 13.3, Lump Sum Payments,
            was added to read as shown.

1/1/00      The Plan was amended and restated as of January 1, 2000 to add the
            last sentence to the second paragraph of Section 8.1.

2/28/01     The MCN Energy Group Board of Directors approved the Plan amendment
            and restatement effective February 28, 2001 to reflect the following
            changes:

            Section 8.2 was amended to read as shown. Prior to amendment,
            Section 8.2 read as follows:

            Section 8.2 Change in Payment Option. The payment option selected by
            the Participant may be changed at any time by the Participant
            submitting a new payment selection to the Committee, however, a
            change shall be effective only if it is received by the Committee at
            least 12 months before payments under the Plan commence.

            A new Section 8.3 was added to read as shown. Prior Sections 8.3
            through 8.6 were redesignated as Sections 8.4 through 8.7.

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