Exhibit 10.18 ALLIANT SERVICES COMPANY KEY EMPLOYEE DEFERRED COMPENSATION PLAN Table of Contents Page ARTICLE 1 BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . 1 ARTICLE 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . 1 2.1 Account . . . . . . . . . . . . . . . . . . . . . . . . 1 2.2 Affiliate . . . . . . . . . . . . . . . . . . . . . . . 1 2.3 Beneficiary . . . . . . . . . . . . . . . . . . . . . . 1 2.4 Code . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.5 Company . . . . . . . . . . . . . . . . . . . . . . . . 1 2.6 Compensation . . . . . . . . . . . . . . . . . . . . . . 1 2.7 Deferred Compensation . . . . . . . . . . . . . . . . . 1 2.8 Disability . . . . . . . . . . . . . . . . . . . . . . . 1 2.9 Effective Date . . . . . . . . . . . . . . . . . . . . . 1 2.10 Eligible Employee . . . . . . . . . . . . . . . . . . . 1 2.11 Employer . . . . . . . . . . . . . . . . . . . . . . . . 2 2.12 ERISA . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.13 Participant . . . . . . . . . . . . . . . . . . . . . . 2 2.14 Plan . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.15 Plan Year . . . . . . . . . . . . . . . . . . . . . . . 2 2.16 Plan Administrator . . . . . . . . . . . . . . . . . . . 2 2.17 Retirement . . . . . . . . . . . . . . . . . . . . . . . 2 2.18 Savings Plan . . . . . . . . . . . . . . . . . . . . . . 2 2.19 Termination of Employment . . . . . . . . . . . . . . . 2 2.20 Unforeseeable Emergency . . . . . . . . . . . . . . . . 2 ARTICLE 3 ADMINISTRATION . . . . . . . . . . . . . . . . . . . . . 2 3.1 Powers and Duties . . . . . . . . . . . . . . . . . . . 2 3.2 Delegation . . . . . . . . . . . . . . . . . . . . . . . 3 ARTICLE 4 DEFERRED COMPENSATION . . . . . . . . . . . . . . . . . 3 4.1 Participant Deferrals . . . . . . . . . . . . . . . . . 3 4.2 Employer Contributions . . . . . . . . . . . . . . . . . 3 4.3 Deferred Compensation Accounts . . . . . . . . . . . . . 4 ARTICLE 5 PAYMENT OF DEFERRED COMPENSATION . . . . . . . . . . . . 5 5.1 Payment of Deferred Compensation . . . . . . . . . . . . 5 5.2 Time of Payment . . . . . . . . . . . . . . . . . . . . 5 5.3 Form of Payment . . . . . . . . . . . . . . . . . . . . 5 5.4 Amount of Payments . . . . . . . . . . . . . . . . . . . 5 5.5 Participant Elections . . . . . . . . . . . . . . . . . 5 5.6 Emergency Payments . . . . . . . . . . . . . . . . . . . 6 5.7 Tax Payments . . . . . . . . . . . . . . . . . . . . . . 6 5.8 Facility of Payment . . . . . . . . . . . . . . . . . . 7 ARTICLE 6 CLAIMS PROCEDURE . . . . . . . . . . . . . . . . . . . . 7 6.1 Decisions on Claims . . . . . . . . . . . . . . . . . . 7 6.2 Review of Denied Claims . . . . . . . . . . . . . . . . 7 ARTICLE 7 FUNDING . . . . . . . . . . . . . . . . . . . . . . . . 8 ARTICLE 8 AMENDMENT AND TERMINATION . . . . . . . . . . . . . . . 8 ARTICLE 9 GENERAL PROVISIONS . . . . . . . . . . . . . . . . . . . 8 9.1 Status of Participants . . . . . . . . . . . . . . . . . 8 9.2 No Guaranty of Employment . . . . . . . . . . . . . . . 8 9.3 Delegation of Authority . . . . . . . . . . . . . . . . 8 9.4 Legal Actions . . . . . . . . . . . . . . . . . . . . . 8 9.5 Applicable Law . . . . . . . . . . . . . . . . . . . . . 9 9.6 Rules of Construction . . . . . . . . . . . . . . . . . 9 9.7 Expenses of Administration . . . . . . . . . . . . . . . 9 9.8 Indemnification . . . . . . . . . . . . . . . . . . . . 9 ARTICLE 1 BACKGROUND Alliant Services Company wishes to adopt a plan to allow certain of its key employees to defer payment of part or all of their current compensation. To accomplish this purpose, it has adopted the Alliant Services Company Key Employee Deferred Compensation Plan as hereinafter set forth. ARTICLE 2 DEFINITIONS When the following words or phrases are used in this Agreement, they shall have the meanings set forth below unless otherwise specifically provided: 2.1 Account. An account which has been established for a Participant pursuant to Section 4.3. 2.2 Affiliate. A business organization that is under common control with the Company, as determined under Section 414(c) of the Code. 2.3 Beneficiary. The person or persons (including a trustee or trustees) designated as a Participant's Beneficiary in the last written instrument signed by the Participant for the purposes of this Plan and received by the Plan Administrator prior to the Participant's death. If no such person has been designated, the Participant's Beneficiary shall be the person or persons who constitute the Participant's beneficiary for the purposes of the Savings Plan. 2.4 Code. The Internal Revenue Code of 1986, as from time to time amended. 2.5 Company. Alliant Services Company, and any successor or successors thereto. 2.6 Compensation. A Participant's base salary and any incentive compensation earned by a Participant under a plan adopted by the Participant's Employer on or after the Effective Date. 2.7 Deferred Compensation. The balance from time to time credited to a Participant's Account. 2.8 Disability. A Participant's eligibility for immediate benefits under his or her Employer's long-term disability plan. 2.9 Effective Date. The later of January 1, 1998 or the effective date of the Company's incorporation. 2.10 Eligible Employee. An employee of an Employer who is a member of a select group of management or highly compensated employees within the meaning of Section 201(2) of ERISA, and who has been designated by the Chief Executive Officer of the Company as being eligible to participate in the Plan. 2.11 Employer. The Company, and each Affiliate of the Company whose employees have been designated as being eligible to participate in the Plan. 2.12 ERISA. The Employee Retirement Income Security Act of 1974, as from time to time amended. 2.13 Participant. An Eligible Employee for whom an Account has been established pursuant to Section 4.3. 2.14 Plan. The Alliant Services Company Key Employee Deferred Compensation Plan, as set forth herein, and as from time to time amended. 2.15 Plan Year. The 12 consecutive month period ending on each December 31. 2.16 Plan Administrator. The Compensation and Personnel Committee of the Board of Directors of Interstate Energy Corporation. 2.17 Retirement. Termination of Employment at or after age 55 or by reason of Disability. 2.18 Savings Plan. The Alliant Services Company Retirement Savings 401(k) Plan. 2.19 Termination of Employment. Severance of a Participant's employment relationship with all of the Employers and their Affiliates. A transfer of employment among Employers or their Affiliates will not constitute a Termination of Employment. 2.20 Unforeseeable Emergency. A severe financial hardship to a Participant resulting from a sudden and unexpected illness or accident of the Participant or a dependent (as defined in Section 152(a) of the Code) of the Participant, loss of the Participant's property due to casualty, or a similar extraordinary and unforeseeable circumstance arising as a result of events beyond the control of the Participant. ARTICLE 3 ADMINISTRATION 3.1 Powers and Duties. Full power and authority to construe, interpret, and administer this Plan is vested in the Plan Administrator. In particular, the Plan Administrator shall make each determination provided for in this Plan and may adopt such rules, regulations, and procedures, as it deems necessary or desirable to the efficient administration of the Plan. The Plan Administrator's determinations need not be uniform, and may be made by it selectively among persons who may be eligible to participate in the Plan. The Plan Administrator shall have sole and exclusive discretion in the exercise of its powers and duties hereunder, and all determinations made by the Plan Administrator shall be final, conclusive, and binding unless they are found by a court of competent jurisdiction to have been arbitrary and capricious. 3.2 Delegation. The Plan Administrator may delegate part or all of is duties to any person or persons, and may from time to time revoke such authority and delegate it to another person or persons. Each such delegation to a person who is not an employee of the Company or an Affiliate will be in writing, and a copy will be furnished to the person to whom the duty is delegated, who will file a written acceptance with the Plan Administrator. Any delegate's duty will terminate upon revocation of such authority by the Plan Administrator, upon withdrawal of such person's acceptance or, in the case of a delegate who is an employee of the Company or an Affiliate, upon the termination of such employment. Any person to whom administrative duties are delegated may, unless the delegation provides otherwise, similarly delegate part or all of such duties to another person. ARTICLE 4 DEFERRED COMPENSATION 4.1 Participant Deferrals. An Eligible Employee may elect to defer up to 100% of his or her Compensation for any Plan Year. An election to defer Compensation shall be made in writing prior to the first day of the Plan Year to which it will apply or, if later, within 30 days after the Eligible Employee is first notified by the Plan Administrator of his or her eligibility to participate in the Plan, and it shall be subject to the following requirements: (a) The election may defer a percentage of the Participant's base salary, and/or a percentage of the Participant's incentive compensation. Amounts deferred from a Participant's base salary shall reduce the Participant's base salary in equal installments for each pay period during the Plan Year (or portion thereof) to which the election applies. Amounts deferred from a Participant's incentive compensation shall reduce the Participant's incentive compensation for the Plan Year on the date such incentive compensation would otherwise be paid to the Participant. (b) The election shall be irrevocable with respect to all Compensation payable for services performed by the Participant during the Plan Year following the date on which the election is received by the Plan Administrator, except that a Participant may terminate an election to defer Compensation if the Plan Administrator determines that the termination is necessary as a result of an Unforeseeable Emergency. 4.2 Employer Contributions. Each Employer shall credit to the Account of each Participant who is employed by that Employer an "Employer Contribution" in an amount equal to 50% of (a) minus (b), where: (a) is the lesser of: (i) the sum of the amounts (if any) contributed by the Participant to the Savings Plan during a Plan Year which were eligible for matching contributions under the Savings Plan, plus the amounts deferred by the Participant during the Plan Year pursuant to Section 4.1; or (ii) 6% of the Participant's base salary for the Plan Year; and (b) is the amount of any matching contributions that were made to the Savings Plan on behalf of the Participant for the Plan Year. Notwithstanding the foregoing, a Participant shall not receive an Employer Contribution for any Plan Year unless: (A) the Participant is employed by an Employer or an Affiliate on the last day of the Plan Year; or (B) the Participant's employment terminated during the Plan Year by reason of the Participant's Retirement or death. 4.3 Deferred Compensation Accounts. The Plan Administrator shall establish an Account in the name of each Participant to record the Deferred Compensation payable to the Participant. Such Account shall be for bookkeeping purposes only, and shall not be deemed to create a fund or trust for the benefit of the Participant. Each Participant's Account shall periodically be adjusted as follows: (a) The Plan Administrator shall credit the following amounts to a Participant's Account: (i) Amounts deferred by a Participant pursuant to Section 4.1 shall be credited to the Participant's Account as of the dates on which they are applied to reduce the Participant's current Compensation. (ii) Amounts contributed on behalf of a Participant by the Participant's Employer pursuant to Section 4.2 shall be credited to the Participant's Account as of July 1 of the Plan Year for which such amounts are contributed. (iii) All deferred amounts credited to a Participant's Account shall be credited interest on December 31 at a rate equivalent to the A-Utility Bond yield (as reported in the Federal Reserve statistical release H.15), or the Wall Street Journal prime interest rate, (whichever is greater), using the average of the rates reported for the last Friday of each month for the preceding year. Interest shall continue to be credited and compounded in this manner until the final payment shall have been made from the Participant's Account. Partial year interest accruals for Participants who because of financial hardship, retirement, termination or death during the Plan Year will also be computed (in the manner prescribed above) using the average rates from the January 1 preceding the Participant's retirement/termination date through the fourth Friday of the month preceding the Participant's retirement or termination date. Interest payments will apply to amounts deferred up to the date the plan distribution is made. (b) The Plan Administrator shall charge to the Participant's Account the amount of any payments made to or on behalf of the Participant, and the amount of any penalty imposed on the Participant pursuant to Section 5.5(c), as of the dates on which such payments are made or such penalty is imposed. ARTICLE 5 PAYMENT OF DEFERRED COMPENSATION 5.1 Payment of Deferred Compensation. In the event of a Participant's Termination of Employment for reasons other than the Participant's death, the balance credited to the Participant's Account shall be paid to the Participant. In the event of a Participant's death, the balance credited to the Participant's Account shall be paid to the Participant's Beneficiary. 5.2 Time of Payment. Payment of a Participant's Deferred Compensation shall commence as follows: (a) Retirement. In the case of a Participant's Retirement, payment shall commence within 60 days after the date of the Participant's Termination of Employment or within 60 days after the last day of the Plan Year in which the Participant retires, as elected by the Participant pursuant to Section 5.5. If payment is made in annual installments, each installment after the first shall be paid within 31 days after the last day of the Plan Year in which the first installment was paid. (b) Death. In the case of a Participant' death, payment shall commence within 60 days after the date the Participant's Beneficiary has been identified. (c) Other Termination of Employment. In the case of a Participant's Termination of Employment for reasons other than the Participant's death or Retirement, payment shall commence within 60 days after the date of the Participant's Termination of Employment. 5.3 Form of Payment. Payments due by reason of a Participant's death or Retirement shall be made in a lump sum or in up to ten annual installments, as elected by the Participant pursuant to Section 5.5. Payments due by reason of a Participant's Termination of Employment for reasons other than a Participant's death or Retirement shall be made in a lump sum. 5.4 Amount of Payments. The amount of a lump sum payment shall be equal to the balance credited to the Participant's Account as of a date selected by the Plan Administrator, which date shall not be more than 30 days prior to the date the lump sum is paid. The amount of an installment payment shall be equal to the balance credited to the Participant's Account as of a date selected by the Plan Administrator (which shall not be more than 30 days prior to the date the installment is paid), divided by the number of installments (including the current installment) remaining to be paid. 5.5 Participant Elections. A Participant's elections concerning the time and form of payment of Deferred Compensation shall be made in writing on forms provided by and filed with the Plan Administrator, and shall be subject to the following requirements: (a) An election concerning the time at which payments of Deferred Compensation will begin must be received by the Plan Administrator with the Participant's first election to defer Compensation pursuant to this Plan. Such an election shall apply to all of the Participant's Deferred Compensation, and it may not be changed or revoked after it has been received by the Plan Administrator except as provided in paragraph (c). In the absence of a valid election, payment of a Participant's Deferred Compensation shall begin within 60 days after the Participant's Termination of Employment. (b) A Participant's election concerning the form in which his or her Deferred Compensation will be paid must be received by the Plan Administrator with the Participant's first election to defer Compensation pursuant to this Plan. Such an election shall apply to all of the Participant's Deferred Compensation, and it may not be changed or revoked after it has been received by the Plan Administrator except as provided in paragraph (c). In the absence of a valid election, a Participant's Deferred Compensation shall be paid in a lump sum. (c) A Participant may change an election as to the time and/or form of payment of his or her Deferred Compensation at any time by giving prior written notice to the Plan Administrator. Any change in a Participant's elections shall result in a penalty in the amount of 10% of the Participant's Deferred Compensation as of the date on which notice of the change is received by the Plan Administrator, which amount shall be forfeited to the Participant's Employer. 5.6 Emergency Payments. In the event of an Unforeseeable Emergency, the Plan Administrator may direct a Participant's Employer to pay any part or all of a Participant's Deferred Compensation to the Participant prior to the time provided in Section 5.2, to the extent necessary to prevent severe financial hardship. Such action shall be taken only if the Participant submits a written application describing the circumstances which are deemed to justify the payment and the amount necessary to prevent severe financial hardship, together with such supporting evidence as the Plan Administrator may reasonably require. Payments shall not be made under this section to the extent the Participant's hardship is or may be relieved: (a) through reimbursement or compensation by insurance or otherwise; (b) by liquidation of the Participant's assets, to the extent this would not in itself cause severe financial hardship; or (c) by the termination of the Participant's election to defer Employer Compensation. 5.7 Tax Payments. If there is a final determination that a Participant or Beneficiary should be taxed on part or all of the Participant's Deferred Compensation before it is actually paid, the Participant's Employer shall pay to the Participant or Beneficiary the portion of the Participant's Deferred Compensation that has been determined to be currently taxable. For the purposes of this section, a "final determination" means a determination by the Internal Revenue Service or a court of competent jurisdiction from which no further appeal may be taken, either because there is no further appeal available or because the time to take such appeal has expired. 5.8 Facility of Payment. An Employer may make payments due to a legally incompetent person in such of the following ways as the Plan Administrator shall determine: (a) directly to such person; (b) to the legal representative of such person; or (c) to a near relative of such person to be used for the person's benefit. Any payment made in accordance with the provisions of this section shall be a complete discharge of the Employer's liability for the making of such payment. ARTICLE 6 CLAIMS PROCEDURE 6.1 Decisions on Claims. If a claim for benefits is denied, the Plan Administrator shall furnish to the claimant within 90 days after its receipt of the claim (or within 180 days after such receipt if special circumstances require an extension of time) a written notice which: (a) specifies the reasons for the denial; (b) refers to the pertinent provisions of the Plan on which the denial is based; (c) describes any additional material or information necessary for the perfection of the claim and explains why such material or information is necessary; and (d) explains the claim review procedures. 6.2 Review of Denied Claims. Upon the written request of the claimant submitted within 60 days after his or her receipt of such written notice, the Plan Administrator shall afford the claimant a full and fair review of the decision denying the claim and, if so requested, permit the claimant to review any documents which are pertinent to the claim, permit the claimant to submit issues and comments in writing, and afford the claimant an opportunity to meet with appropriate representatives of the Plan Administrator as a part of the review procedure. Within 60 days after its receipt of a request for review (or within 120 days after such receipt if special circumstances, such as the need to hold a hearing, require an extension of time) the Plan Administrator shall notify the claimant in writing of its decision and the reasons for its decision and shall refer the claimant to the provisions of the Plan which form the basis for its decision. ARTICLE 7 FUNDING This Plan is intended to be "unfunded" for the purposes of the Code and Title I of ERISA; however, nothing herein shall prevent an Employer, in its sole discretion, from establishing a trust of the type commonly known as a "rabbi trust" to assist it in meeting its obligations under the Plan. ARTICLE 8 AMENDMENT AND TERMINATION The Plan Administrator may amend or terminate this Plan at any time and for any reason; provided, that no amendment or termination of the Plan shall alter a Participant's right to receive payment of amounts previously credited to the Participant's Account. ARTICLE 9 GENERAL PROVISIONS 9.1 Status of Participants. Each Participant shall be a general unsecured creditors of his or her Employer with respect to amounts payable hereunder, this Plan constituting a mere promise by the Employers to make benefit payments in the future. A Participant's right to receive payments under the Plan are not subject in any manner to anticipation, alienation, sale, assignment, pledge, encumbrance, attachment, or garnishment by the creditors of the Participant or the Participant's Beneficiaries. 9.2 No Guaranty of Employment. The establishment of this Plan shall not give a Participant any legal or equitable right to be continued in the employ of an Employer, nor shall it interfere with an Employer's right to terminate the employment of any of its employees, with or without cause. 9.3 Delegation of Authority. Whenever, under the terms of this Plan, an Employer is permitted or required to do or perform any act, it shall be done or performed by the Board of Directors of the Employer, by any duly authorized committee thereof, or by any officer of the Employer duly authorized by the articles of incorporation, bylaws, or Board of Directors of the Employer. 9.4 Legal Actions. No Participant, Beneficiary, or other person having or claiming to have an interest in this Plan shall be a necessary party to any action or proceeding involving the Plan, and no such person shall be entitled to any notice or process, except to the extent required by applicable law. Any final judgment which is not appealed or appealable that may be entered in any such action or proceeding shall be binding and conclusive on all persons having or claiming to have any interest in this Plan. 9.5 Applicable Law. This Plan shall be construed and interpreted in accordance with the laws of the State of Iowa, except to the extent the same are preempted by ERISA or other federal law. 9.6 Rules of Construction. Wherever 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, and wherever any words are used herein 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 of this Plan are inserted for convenience of reference, are not a part of this Plan, and are not to be considered in the construction hereof. The words "hereof," "herein," "hereunder," and other similar compounds of the word "here" shall mean and refer to the entire Plan, and not to any particular provision or section. 9.7 Expenses of Administration. All expenses and costs incurred in connection with the administration or operation of the Plan shall be paid by the Employers and/or any trust of the type described in Article 7. 9.8 Indemnification. Each Employer shall, to the extent permitted by its articles of incorporation and bylaws, and by the laws of the state in which it is incorporated, indemnify any employee or director of an Employer or an Affiliate providing services to the Plan against any and all liabilities arising by reason of any act or omission, made in good faith pursuant to the provisions of the Plan, including expenses reasonably incurred in the defense of any claim relating thereto. To record the adoption of the Plan as set forth above, the undersigned has executed this document this ___ day of ________________, 1997, for and on behalf of the Company. ALLIANT SERVICES COMPANY By_____________________________ As its__________________________ ATTEST: __________________________________ As its____________________________