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|  AMEREN      DEFERRED COMPENSATION PLAN |
|----------------------------------------------|
| 2008 Document                      |
|                                         |

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|   | AMEREN      DEFERRED COMPENSATION PLAN  |
|--------|----------------------------------------------|

|   | 2008      Document  |
|--------|--------------------------|

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| 1.   | PURPOSE AND      AMENDMENT |
|----------------|----------------------------|

|   | The      purpose of the Ameren Deferred Compensation Plan (“Plan”) is to provide      eligible participants with the opportunity to accumulate capital of up to      50 percent of annual base salary and some or all of the Incentive Awards      awarded pursuant to the Ameren Corporation Executive Incentive      Compensation Program.  Participation in the Plan is      voluntary.  The implementation of the Plan will provide Ameren      Corporation and its subsidiaries (“Ameren”) with the means to attract and      retain key employees by offering a competitive salary deferral      program.  The Plan is administered by the Ameren Services      Company (“Company”). |
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| 2.   | DEFINITIONS |
|----------------|-------------|

|   | Certain      words and phrases are defined when first used in later paragraphs of the      Plan.  In addition, the following words and phrases when used      herein, unless the context clearly requires otherwise, shall have the      following respective meanings: |
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| A.   | Ameren:  As      used herein shall mean Ameren Corporation and its      subsidiaries. |
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| B.   | Board:  The      Board of Directors of AmerenCorporation. |
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| C.   | Company:  As      used herein shall mean Ameren Services Company, as agent for Ameren and as      administrator of the Plan. |
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| D.   | Deferral      Account:  Book entries reflecting each Participant’s      Deferred Amounts and Interest credited thereon pursuant to the provisions      of Section 6.  A separate Deferral Account shall be      maintained for each Deferral Commitment commenced    hereunder. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| E.   | Deferral      Commitment:  The sum of the Salary and Incentive Award      deferrals to which the Participant obligates himself pursuant to the      provisions of Section 4. |
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| F.   | Deferred      Amount:  The amount of Salary and Incentive Award which a      Participant elects to defer pursuant to the provisions of the      Plan. |
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| G.   | Effective      Date:  January 1, 2008, as restated and amended from time      to time. |
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| H.   | Incentive      Award:  The portion of an incentive award awarded to an      officer, executive or other employee of Ameren pursuant to the provisions      of the Ameren Executive Incentive Compensation Program which is deferred      pursuant to the provisions of thePlan. |
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| I.   | Interest:  The      amount of interest which a Participant shall be deemed to earn on his      Deferred Amounts and which shall be credited to his Deferral Account as      determined pursuant to Section 7. |
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| J.   | Participant:  Any      person eligible to participate in the Plan pursuant to Section 3 who      elects or has elected to defer a portion of his salary pursuant to the      provisions of the Plan. |
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|   | For      purposes of Sections 8 and 9, a Participant who transfers employment to      any subsidiary of Ameren Corporation or other entity in which Ameren      Corporation has a twenty percent (20%) or greater ownership interest shall      be deemed not to have terminated employment as long as such Participant is      an employee of such a subsidiary or entity.  However, such      individual shall be eligible to continue deferring amounts into the Plan      during the calendar year of such transfer only with respect to amounts      which qualify as Salary. |
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| K.   | Performance-Based      Compensation:  An Incentive Award that (a) is based on      services performed over a period of at least 12 months and (b) constitutes      performance-based compensation as defined in Treasury Regulations issued      under Code Section 409A. |
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| L.   | Plan:  The      Ameren Deferred Compensation Plan, as revised and  restated. |
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| M.   | Plan      Year:  The 12-month period commencing January 1 and      ending on December 31. |
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| N.   | Retirement:  Termination      of employment after attainment of at least age  55. |
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| O.   | Salary:  The      annual base pay of a Participant, exclusive of any income from      commissions, benefits, allowances, and/or other incentive plans paid by      Ameren. |
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| P.   | Specified      Employee:  A key employee (as defined in Code Section      416(i) without regard to Code Section 416(i)(5)) determined in accordance      with the meaning of such term under Code Section 409A and the regulations      promulgated thereunder and the resolutions of the Board of Directors of      Ameren Corporation governing suchdetermination. |
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| 3.   | ELIGIBILITY |
|----------------|-------------|

|   | Any      employee of Ameren who is designated and treated by Ameren as a member of      the Ameren Leadership Team shall be eligible to participate in the Plan,      unless the Human Resources Committee of Ameren Corporation Board of      Directors designates such person as ineligible for the      Plan.  Any individual who is eligible to participate in the Plan      may become a Participant by commencing a Deferral    Commitment. |
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| 4.   | COMMENCING A DEFERRAL      COMMITMENT |
|----------------|---------------------------------------|

| A. | Maximum      Deferrals: |
|----|-------------------------|

|   | A      Participant may commence a Deferral Commitment by making an election to      defer a percentage of Salary, in 1% increments, up to a maximum of 50      percent. The amount of Salary deferred may not reduce the amount of the      Participant’s non-deferred Salary for the year of deferral below the      maximum level of “Federal Insurance Contributions Act taxable wages”      (i.e., the FICA taxable wage base).  Upon application to the      Company by a Participant, the Company may, in its discretion, permit a      Participant to defer Salary in excess of 50 percent or waive the FICA      taxable wage base limitation.  A Participant may defer receiving      some or all of an Incentive Award granted to such Participant, as      described above, by electing to defer receiving either a percentage of an      Incentive Award otherwise payable to him or by electing to defer all of an      Incentive Award greater than a set dollar  amount. |
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| B. | Irrevocability of      Deferral Commitment: |
|----|---------------------------------------------|

|   | During      a Plan Year, a Deferral Commitment shall be irrevocable, and the deferral      percentage or amount elected by the Participant thereunder shall not be      increased or decreased. |
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| C. | Term of Deferral      Commitment: |
|----|-----------------------------------|

|   | The      term of a normal Deferral Commitment shall be the Plan    Year. |
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| D. | Crediting of Deferred      Amounts: |
|----|-------------------------------------|

|   | The      Participant’s Deferred Amounts shall be credited to his Deferral Account      by no later than the end of the month in which such amounts would, but for      such deferral, be payable to theParticipant. |
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| 5.   | TERMS OF DEFERRAL      ELECTION |
|----------------|---------------------------------|

|   | A      Participant’s written election to defer Salary for a Plan Year shall      indicate the percentage or amount of Salary and/or Incentive Award which      the Participant is electing to defer under the Plan and the method of      distribution of such amounts, as permitted under Section      8.  Such election shall be made in accordance with procedures      established by the Company by no later than the last date specified for      such election, which shall not be later than (a) in the case of an      election to defer Salary or an Incentive Award that is not      Performance-Based Compensation, the December 31 preceding the first day of      the Plan Year for which the Salary or Incentive Award is earned or (b) in      the case of an election to defer an Incentive Award which is      Performance-Based Compensation, a date (as determined by the Company) no      later than the date that is six months before the end of the performance      period, provided that, (1) the Participant continuously performs services      from the date the performance criteria are established through the date      the Participant makes his or her election and (2) the Incentive Award is      not substantially certain to be paid and is not readily ascertainable as      of such date.  In the case of a Participant who first becomes      eligible to participate in this Plan |
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| 6.   | PARTICIPANT DEFERRAL      ACCOUNT |
|----------------|-----------------------------------|

|   | There      shall be established a Deferral Account in the name of each Participant      who elects to defer Salary and/or an Incentive Award by commencing a      Deferral Commitment under the provisions of the Plan. A separate Deferral      Account will be maintained for each Deferral Commitment commenced by each      Participant with respect to Salary and Incentive Awards related to that      Deferral Commitment.  The Deferral Account shall reflect the      value of the Participant’s Deferred Amounts plus Interest credited thereon      with respect to the specific Deferral Commitment.  The records      for each Deferral Account maintained for the Participant shall be      available for inspection by the Participant at reasonable times, and the      Company shall make available to the Participant a statement indicating the      aggregate amount credited to each of the Participant’s Deferral Accounts      and the value of each such DeferralAccount. |
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| 7.   | INTEREST ON DEFERRED      AMOUNTS |
|----------------|-----------------------------------|

|   | Interest      calculated at the rate or rates, as hereinafter described, shall accrue      from the date Salary and/or Incentive Awards deferrals are credited to the      Participant’s Deferral Account and shall be compounded annually and      credited to the Participant’s Deferral Account as of the last business day      of each Plan Year (or as of such other dates as determined by the Company)      for which the Participant has a Deferral Account balance. While the      Participant is employed by Ameren, the Participant’s Deferral Account      balance shall earn Interest at the “Plan Interest Rate.”  After      retirement, termination of employment (in the case of a Specified Employee      subject to a 6-month delay described in Section 9.C) or following the      death of the Participant, the Participant’s Deferral Account balance shall      earn interest at the “Base InterestRate.” |
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|   | The      “Plan Interest Rate” for any Plan Year shall be 150 percent of the average      Mergent’s Seasoned AAA Corporate Bond Yield Index (“Mergent’s Index”,      formerly called “Moody’s Index”) for the previous calendar      year.  Interest rates are calculated annually as of the first      day of the Plan Year. |
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|   | The      “Base Interest Rate” for any Plan Year shall be equal to the average      Mergent’s Index for the previous calendaryear. |
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| 8.   | DISTRIBUTION AT      RETIREMENT |
|----------------|---------------------------------|

|   | A. | Distribution      Alternatives: |
|--------|----|---------------------------------|

| 1.      | The      balance of the Participant’s Deferral Account to be distributed in a      single lump sum, payable the first day of the first month following the      month in which Retirement occurs. |
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| 2.           | The      balance of the Participant’s Deferral Account to be distributed in a      single lump sum, payable on March 1 of the calendar year following      Retirement. |
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| 3.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 5 years commencing at      Retirement. |
|----------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 5 years commencing on      March 1 of the calendar year following  Retirement. |
|----------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 5.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 10 years commencing at      Retirement. |
|----------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| 6.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 10 years commencing on      March 1 of the calendar year following  Retirement. |
|----------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 7.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 15 years commencing at      Retirement. |
|----------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 8.           | The      balance of the Participant’s Deferral Account to be distributed in      substantially equal installments over a period of 15 years commencing on      March 1 of the calendar year following  Retirement. |
|----------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | Installment      payments (Alternatives 3 through 8) shall be paid annually, unless the      Participant elects, at the time Alternatives 3 through 8, as applicable,      are elected, to receive them on a monthly basis.  The      distribution options available in circumstances where the Participant      dies, either before or after Retirement, or is placed on disability status      prior to Retirement are described in Sections 10 and 11.  The      deferral of payments to the calendar year following Retirement      (Alternatives 2, 4, 6 and 8) is not permitted in cases of death or      long-term disability. |
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| B. | Subsequent Election      Changes: |
|----|-----------------------------------|

|   | In      accordance with the procedures established by the Company, a Participant      may elect to change his method of distribution with respect to Deferral      Commitments related to years prior to 2009, with respect to amounts not      otherwise payable in 2008, if such an election is made no later than      December 31, 2008. |
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|   | On      and after January 1, 2009, a Participant may elect to change his method of      distribution with respect to one or more Deferral Accounts in accordance      with rules established by the Company.  If a Participant makes      such election, then (a) such election shall not take effect until at least      12 months after the date on which such election is made, and submitted to      the Company; (b) the first payment with respect to which such election is      made shall be deferred for a period of not less than 5 years from the date      such payment would otherwise have been made; (c) any election related to a      payment that was otherwise to be made at a specified time may not be made      less than 12 months prior to the date of the first scheduled payment; and      (d) with respect to a change in payment form, such change may not      impermissibly accelerate the time or schedule of any payment under the      Plan, except as provided in regulations promulgated by the Secretary of      Treasury. |
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|   | A      change in the method of distribution must be made in accordance with the      rules and procedures established by theCompany. |
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| 9.   | TERMINATION OF      EMPLOYMENT PRIOR TO BECOMING ELIGIBLE FOR  RETIREMENT |
|----------------|---------------------------------------------------------------------------|

| A.   | General: |
|----------------|----------|

|   | Except      as described in Paragraph B, if a Participant terminates employment after      completing one or more Deferral Commitments but prior to becoming eligible      for |
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| B.   | Change of      Control: |
|----------------|-------------------------|

|   | In      the event that a Participant terminates employment from Ameren after      completing one or more Deferral Commitments but prior to becoming eligible      for Retirement and after the occurrence of a Change of Control, the      balance of the Participant’s Deferral Account(s), including Interest      calculated at the Plan Interest Rate, shall be distributed in a single sum      to the Participant no later than 30 days after the date the Participant      terminates employment.  For purposes of this Paragraph, Change      of Control shall have the same meaning that it has in the Amended and      Restated Ameren Corporation Change of Control Severance      Plan.  The participant shall not have the right to designate the      taxable year of the payment. |
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|   | C. | Specified Employee      Restriction: |
|--------|----|--------------------------------------|

|   | Notwithstanding      the above, payment of benefits shall not be made under this Section 9      prior to the date which is 6 months after the date of a Participant’s      termination of employment in the case of a Participant who is determined      to be a Specified Employee at the time of his termination of      employment.  In such case, the lump sum amount determined under      Section 9.A or 9.B, as appropriate, shall be paid to the Participant as of      the day after the last day of such 6-month  period. |
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|   | D. | Termination of      Employment: |
|--------|----|---------------------------------|

|   | For      purposes of Sections 2N, 8 and 9, a Participant shall be deemed to have      terminated employment if Ameren and the Participant reasonably anticipate      a permanent reduction in his or her level of bona fide services to a level      less than 50% of the average level of bona fide services provided by the      Participant in the immediately preceding 36-month      period.  Notwithstanding the preceding sentence, no termination      of employment shall occur (1) while the  Participant is on      military leave, sick leave, or other bona fide leave-of-absence which does      not exceed six months or such longer period during which the Participant      retains a right to reemployment with Ameren pursuant to law or by      contract; or (2) while the Participant is on a leave-of-absence due to a      medically determinable physical or mental impairment that can be expected      to last for a continuous period of six months or more and results in the      Participant being unable to perform services for Ameren in his or her      position or a substantially similar position and that does not exceed 29      months.  A leave of absence will be a bona fide leave-of-absence      only if there is a reasonable expectation that the Participant will return      to perform services for Ameren. |
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| 10.   | SCHEDULE PAYMENT      OPTION |
|-----------------|------------------------------|

|   | At      the time a Participant makes an election to defer Salary and/or Incentive      Awards under the Plan, he or she may elect for the distribution of the      balance of that Deferral Account to be made in a specified year; provided      such year is at least three years after the year to which the deferral      relates.  Distributions pursuant to this scheduled payment      option shall be paid in a lump sum no later than the December 31st      of the specified year. |
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| 11.   | TOTAL DISABILITY OF      PARTICIPANT |
|-----------------|--------------------------------------|

|   | In      the event that it is determined by a duly licensed physician selected by      the Company that, because of ill health, accident or other disability, a      Participant is no longer able, properly and satisfactorily, to perform his      regular duties and responsibilities, and therefore, such Participant has      been placed on long term disability ("LTD"), the Company shall commence      distribution of the Participant’s Deferral Account(s) in accordance with      the distribution method selected by the Participant, but only if the      Participant is disabled within the meaning of Code Section 409A(a)(2)(C).      Where a Participant had elected a deferral option (Section 8, Alternatives      2, 4, 6 and 8), payments will be made in the same form as elected (i.e.,      lump sum or installment) but will commence no later than 30 days after the      Participant’s LTD effective date, to the extent a distribution is      permitted under the previous sentence.  The Participant shall      not have a right to designate the taxable year of the      payment.  Under this provision, a Participant on LTD status may      receive a distribution from his Deferral Account(s) prior to attaining age      55. |
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| 12.   | DEATH OF      PARTICIPANT |
|-----------------|---------------------------|

| A.   | Prior to      Retirement: |
|----------------|---------------------------|

|   | In      the event of the Participant’s death after attaining at least age 55, the      Company shall commence distribution of the Participant’s Deferral      Account(s) to the Participant’s designated beneficiary(ies) according to      the method(s) selected by the Participant pursuant to Section      8.  If a Participant dies prior to attaining age 55 and prior to      receiving benefits under the Plan, the Company shall commence distribution      to the Participant’s designated beneficiary(ies) in a lump      sum.  Even if the Participant had chosen a deferral option      (Section 8, Alternatives 2, 4, 6 and 8), payment will commence as soon as      administratively feasible but no later than 30 days after the month in      which the Participant’s death occurs.  Neither the Participant      nor a beneficiary shall have a right to designate the taxable year of the      payment. |
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| B.   | After      Retirement: |
|----------------|------------------------|

|   | In      the event a Participant dies after his Retirement but prior to receiving      benefits under the Plan, the Company shall commence distribution of the      Participant’s Deferral Account(s) to the Participant’s designated      beneficiary(ies).  Such payments will be made in the same form      as elected (i.e., lump sum or installment) but will commence as soon as      administratively feasible, but no later than 30 days after the month in      which the Participant’s death occurs.  Neither the Participant      nor a beneficiary shall have a right to designate the taxable year of the      payment.  Where a Participant who is receiving benefits dies,      the Company shall |
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| 13.   | HARDSHIP      DISTRIBUTION |
|-----------------|----------------------------|

|   | In      the event that a Participant (or in the case of the Participant’s death,      his beneficiary) suffers a Financial Hardship, the Company may, if it      deems advisable in its sole and absolute discretion, distribute on behalf      of the Participant, his beneficiary or his legal representative, any      portion of the Participant’s Deferral Account(s), but in no event more      than the amount reasonably necessary to relieve the Financial Hardship      upon which the request is based, plus the federal and state taxes due on      the withdrawal, as determined by the Company.  Any such hardship      distribution shall be made at such times as the Company shall determine,      and the Participant’s Deferral Account(s) shall be reduced by the amount      so distributed and/or utilized.  Financial Hardship means a      severe financial hardship to a Participant resulting from an illness or      accident of the Participant, his or her spouse or a dependent (as defined      in Code Section 152(a)) of the Participant, loss of the Participant's      property due to casualty, or other similar extraordinary and unforeseeable      circumstances arising as a result of events beyond the control of the      Participant. |
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|   | Notwithstanding      any other provision of this Plan, if a Participant receives a safe harbor      hardship distribution under any tax-qualified employee retirement plan      maintained by his or her employer, all deferral elections of the      Participant under the Plan shall be suspended for a period of at least 6      months, and the Participant shall not be eligible to resume deferrals      hereunder until the Plan Year beginning after expiration of such 6-month      period. |
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| 14.   | DESIGNATION OF      BENEFICIARY |
|-----------------|---------------------------------|

|   | The      Participant shall designate in writing, on a form approved by the Company,      one or more primary and/or secondary beneficiaries who shall receive      distributions otherwise payable to the Participant or as otherwise      authorized by the Plan, and such beneficiary designation shall be      controlling with respect to all Deferral Accounts such Participant may      have pursuant to the provisions of the Plan.  The Participant’s      spouse, if any, must consent in writing to the designation of a primary      beneficiary(ies) other than such spouse as the sole primary      beneficiary.  Subject to the requirement of the preceding      sentence, the Participant shall have the right, at any time and for any      reason, to submit a revised designation of beneficiary.  Such      revised designation of beneficiary shall become effective provided it is      delivered to the Company prior to the death of such Participant, and it      shall supersede all prior designations of beneficiary submitted by the      Participant.  A beneficiary may be a natural person or an entity      (such as a trust or a charitableorganization). |
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|   | If      no designation of beneficiary has been received by the Company from the      Participant prior to his death, or if the beneficiary(ies) designated by      the Participant has not survived the Participant or cannot otherwise be      located by the Company within a reasonable period of time, distributions      shall be made to the person or persons in the first of the following      classes of successive preference: |
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| 1.   | The      Participant’s surviving spouse. |
|----------------|------------------------------------------------|

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| 2.   | The      Participant’s surviving children,equally. |
|----------------|----------------------------------------------------------|

| 3.   | The      Participant’s surviving parents,equally. |
|----------------|---------------------------------------------------------|

| 4.   | The      Participant’s surviving brothers and sisters,  equally. |
|----------------|------------------------------------------------------------------------|

| 5.   | The      Participant’s personal representative(s), executor(s) or      administrator(s). |
|----------------|------------------------------------------------------------------------------------------------|

| 15.   | PAYMENTS TO MINORS OR      INCOMPETENTS |
|-----------------|-----------------------------------------|

|   | Whenever,      in the Company’s opinion, a person entitled to receive any payment under      the Plan is a minor, is under a legal or other disability or is so      incapacitated as to be unable to manage his financial affairs, a      distribution may be made to such person or to his legal representative or      to a relative or friend of such person for his benefit, or for the benefit      of such person in whatever manner the Company considers      advisable.  Any payment of a benefit in accordance with the      provisions of this Section shall be a complete discharge of any liability      for the making of such payment under the provisions of the      Plan. |
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| 16.   | ADMINISTRATION |
|-----------------|----------------|

|   | Except      as specified otherwise in the Plan, the Company shall have full power and      discretion to administer, construe and interpret the Plan.  Any      authorized action or decision under the provisions of the Plan undertaken      by the Company arising out of, or in connection with the administration,      construction, interpretation or effect of the Plan, or recommendations in      accordance therewith, or any rules and regulations adopted by the Company      shall be conclusive and binding on all Participants and their      beneficiaries and all other personswhosoever. |
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| 17.   | MISCELLANEOUS |
|-----------------|---------------|

| A.   | No Trust      Created:  The arrangements hereunder are unfunded for tax      purposes and for the purposes of ERISA, Title I. Nothing contained in the      Plan, and no action taken pursuant to its provisions shall create, or be      construed to create, a trust, escrow of any kind, or a fiduciary      relationship between Ameren and the Participant, his designated      beneficiary(ies), other beneficiaries of the Participant or any other      person. |
|----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| B.   | Unsecured General      Creditor Status:  Distributions to the Participant or his      designated beneficiary(ies) or any other beneficiary(ies) hereunder shall      be made from assets which prior to distribution shall continue, for all      purposes, to be a part of the general corporate assets and no person      (including Participants) shall have any interest in such assets of Ameren,      including without limitation the proceeds of life or other insurance      policies, by virtue of the provisions of the Plan.  To the      extent that any person, including the Participant, acquires a right to      receive distributions under the provisions hereof, such right shall be no      greater than the right of any unsecured general creditor of      Ameren  and the obligation to pay constitutes a mere promise of      Ameren to make payments in thefuture. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| C.   | Recovery of      Costs:  In the event that the Company purchases an      insurance policy or policies insuring the life of a Participant or any      other property to allow Ameren to recover the costs of providing deferred      compensation in whole or in part, hereunder, neither the Participant, his      beneficiary(ies) nor any other person or persons shall have any rights      therein whatsoever. Ameren shall be the sole owners and beneficiaries of      any such insurance policy and shall possess and may exercise all incidents      of ownership therein. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| D.   | Protective      Provisions:  A Participant shall cooperate with the      Company by providing all information requested including a medical      history.  In connection therewith, the Company reserves the      right to require that the Participant submit to a physical examination if      such examination is deemed to be necessary or appropriate.  The      costs of all such physical examinations will be paid by the      Company.  If the Participant refuses to cooperate with the      Company, the Company shall have no further obligation to the Participant      under the provisions of the Plan. If the Participant makes any material      misstatement of information or non-disclosure of medical history, then no      benefits shall be payable to the Participant or his beneficiary(ies) over      and above actual Salary deferrals. |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| E.   | No Contract of      Employment:  Nothing contained herein shall be construed      to be a contract of employment for any term of years, nor a conferring      upon the Participant the right to continue to be employed in his present      capacity, or in any capacity.  It is expressly understood that      the Plan relates to the payment of deferred compensation for the      Participant’s services normally distributable after termination of his      employment, and the Plan is not in any way intended to be an employment      contract. |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| F.   | Spendthrift      Provisions:  Neither the Participant, his      beneficiary(ies), nor any other person or persons shall have any power or      right to sell, alienate, attach, garnish, transfer, assign, anticipate,      pledge or otherwise encumber any part or all of a Deferral Account      maintained or distributable hereunder. No amounts hereunder shall be      subject to seizure by any creditor of the Participant or a beneficiary,      beneficiary(ies) or any other person or persons by a proceeding at law or      in equity, nor shall such amounts be transferable by operation of law in      the event of divorce, legal separation, bankruptcy, insolvency or death of      the Participant, his beneficiary(ies), or any other person or      persons.  Any such attempted assignment or transfer shall be      null and void. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| G.   | Withholding      Taxes:  To the extent required by the law in effect at      the time that deferrals are made hereunder, the Company shall withhold      from non-deferred compensation the payroll taxes required to be withheld      by the federal or any state or localgovernment. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| H.   | Suspension,      Termination and Amendment:  The Board of Directors of      Ameren Corporation shall have the power to suspend or terminate the Plan      in whole or in part at any time, and from time-to-time to extend, modify,      amend or revise the Plan in such respects as the Board of Directors by      resolution may deem advisable, provided that (1) no such extension,      modification, amendment or revision shall deprive a Participant, or any      beneficiary(ies) thereof, of any part or all of the |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| I.   | Conflicts:  Any      conflict in the language or terms or interpretation of the language or      terms of the Plan between this Plan document and any other document which      purports to describe the rights, benefits, duties or obligations of any      Participant, Ameren or any other person or entity shall be resolved in      favor of this Plan document. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| J.   | Validity:  In      the event any provision of the Plan is held invalid, void, or      unenforceable, the same shall not affect, in any respect whatsoever, the      validity of any other provision of thePlan. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| K.   | Captions:  The      captions of the articles and sections of the Plan are for convenience only      and shall not control nor affect the meaning or construction of any of its      provisions. |
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| L.   | Gender and      Plurals:  Wherever used in the Plan, words in the      masculine gender shall include masculine or feminine gender, and, unless      the context otherwise requires, words in the singular shall include the      plural, and words in the plural shall include the  singular. |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| M.   | Notice:  Any      election, beneficiary designation, notice, consent or demand required or      permitted to be given under the provisions of the Plan shall be in writing      and shall be signed by the Participant.  If such election,      beneficiary designation, notice, consent or demand is mailed by a      Participant, it shall be sent by United States Certified Mail, postage      prepaid, and addressed to the chief human resources officer, Ameren      Services Company, P. O. Box 66149, St. Louis, Missouri      63166-6149. The date of such mailing shall be deemed to be the date of      such notice, consent or demand. |
|----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| N.   | Governing      Law:  The Plan, and the rights of the parties hereunder,      shall be governed by and construed in accordance with the laws of the      State of Missouri. |
|----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| O.   | Disputes:  A      Participant who believes that he is being denied a benefit to which he is      entitled (hereinafter referred to as “Claimant”), or his representative,      may file a written request for such benefit with the Plan Administrator of      the Plan setting forth his claim.  The request must be addressed      to:  Ameren Services Company, Employee Benefits Department, P.O.      Box 66149, MC 533, St. Louis, Missouri 63166-6149, Attention: Plan      Administrator, Deferred CompensationPlan. |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| 1. | the      specific reason or reasons fordenials. |
|----|-------------------------------------------------|

| 2. | specific      references to pertinent Plan provisions on which the denial is      based. |
|----|------------------------------------------------------------------------------------------|

| 3. | a      description of any additional material or information necessary for the      Claimant to perfect the claim and an explanation why such material or such      information is necessary. |
|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4. | appropriate      information as to the steps to be taken if the Claimant wishes to submit      the claim for review, including a statement of the Claimant's right to      bring a civil action forllowing an adverse benefit determination on      review, and |
|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 5. | the      time limits for requesting a review and for the actual      review.                                                                                                                                                                               |

| 1. | the      specific reason or reasons for denial,                                                                                                                                                                    |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2. | specific      references to pertinent Plan provisions on which the denial is      based,                                                                                                                           |
| 3. | a      statement that the Claimant is entitled to receive, upon request and free      of charge, reasonable access to, and copies of, all documents, records and      other information relevant to his claim, and |
| 4. | a      statement of the Claimant’s right to bring a civil action following an      adverse benefit determination onreview.                                                                                   |

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| P.   | Interpretation of      Plan:  All provisions of this Plan shall be interpreted      in a manner so as to be consistent with Section 409A of the Code and the      regulations issued thereunder. |
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