Ex99-1
                               VECTREN CORPORATION
                           CHANGE IN CONTROL AGREEMENT


         This AGREEMENT is by and between Vectren Corporation, an Indiana
corporation (the "Company"), and Niel C. Ellerbrook (the "Executive"), dated as
of March 1, 2005 (the "Commencement Date"), and provides as follows:

     1. Definitions.

          (a) Cause. "Cause" shall mean:

               (i) intentional  gross misconduct by the Executive  damaging in a
          material way to the Company,

               (ii) the Executive's commission of fraud against the Company,

               (iii)the Executive's public acts of dishonesty or conviction of a
          felony, or

               (iv) a material breach of this  Agreement,  after the Company has
          given the Executive  notice  thereof and a reasonable  opportunity  to
          cure.

          (b) Change in Control. "Change in Control" shall mean:

               (i) 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 twenty  percent (20%) or more of either (A)
          the then  outstanding  shares  of  common  stock of the  Company  (the
          "Outstanding  Company Common Stock") or (B) 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
          acquisitions  shall not constitute an acquisition 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  (A),  (B) and (C) of  subsection  (iii) of this
          paragraph are satisfied;

               (ii) Individuals who, as of the Commencement Date, constitute the
          Board of Directors of the Company (the  "Incumbent  Board")  cease for
          any reason to constitute at least a majority of the Board of Directors
          of the Company (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

               (iii) Consummation of a reorganization,  merger or consolidation,
          in  each  case,  unless,  following  such  reorganization,  merger  or
          consolidation, (A) more than sixty percent (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  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, (B) 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, twenty percent (20%) or more
          of the Outstanding  Company Common Stock or Outstanding Company Voting
          Securities,  as the  case  may  be)  beneficially  owns,  directly  or
          indirectly,  twenty percent (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 (C) 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;

               (iv)  Approval  by  the  shareholders  of  the  Company  of (A) a
          complete  liquidation or dissolution of the Company or (B) 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  (1) more than sixty percent (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, (2) 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,  twenty percent (20%) or more of
          the  Outstanding  Company Common Stock or  Outstanding  Company Voting
          Securities,  as the  case  may  be)  beneficially  owns,  directly  or
          indirectly,  twenty percent (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 (3) 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; or

               (v) The closing,  as defined in the documents  relating to, or as
          evidenced  by a  certificate  of any  state  or  federal  governmental
          authority in connection  with, a transaction  approval of which by the
          shareholders  of the Company  would  constitute an "Change in Control"
          under subsection (iii) or (iv) of this Section 1(b) of this Agreement.

          (c) Date of Termination. "Date of Termination" shall mean the date the
     Executive's employment is terminated.

          (d) Disability.  "Disability"  shall have the meaning set forth in the
     Company's long term disability plan.

          (e) Good Reason.  "Good  Reason"  shall mean,  after the Window Period
     without the Executive's written consent,  (i) a demotion in the Executive's
     status,  position or responsibilities  which, in the Executive's reasonable
     judgment,  does not  represent a  promotion  from the  Executive's  status,
     position or  responsibilities as in effect at the end of the Window Period;
     (ii) the  assignment  to the  Executive  of any duties or  responsibilities
     which, in the Executive's  reasonable judgment,  are inconsistent with such
     status,  position or  responsibilities  at the end of the Window Period; or
     any removal of the  Executive  from or failure to  reappoint or reelect the
     Executive to any of such positions that the Executive had at the end of the
     Window Period, except in connection with the termination of the Executive's
     employment for  Disability,  death or Cause or by the Executive  other than
     for Good Reason;  (iii) a reduction by the Company in the Executive's  base
     salary  as in  effect  at the end of the  Window  Period  or the  Company's
     failure to increase  (within  twelve (12)  months of the  Executive's  last
     increase in base salary) the  Executive's  base salary after the end of the
     Window  Period  in an  amount  which at  least  equals,  on an  appropriate
     percentage  basis,  an  amount  reasonably  comparable  to  the  percentage
     increases in base salary for all Company  employees at the same  employment
     level as the Executive  effected in the preceding twelve (12) months;  (iv)
     the relocation of the principal executive offices of the Company or Company
     affiliate,  whichever  entity on behalf of which the  Executive  performs a
     principal  function  of that entity as part of the  Executive's  employment
     services,  to a location more than fifty (50) miles outside the Evansville,
     Indiana metropolitan area or, if the Executive's services are not performed
     in Evansville,  Indiana,  the Company's requiring the Executive to be based
     at any place other than the location at which the  Executive  performed the
     Executive's  duties at the end of the Window  Period,  except for  required
     travel on the Company's business to an extent substantially consistent with
     the  Executive's  business  travel  obligations  at the time of a Change in
     Control;  (v) a reduction  in the  Executive's  total  direct  compensation
     opportunity from the opportunity in effect at the end of the Window Period;
     (vi) the failure by the Company to continue in effect any incentive,  bonus
     or other  compensation plan in which the Executive  participates at the end
     of the Window Period,  including,  but not limited to, the Company's  stock
     option and restricted stock plans, if any, unless an equitable  arrangement
     (embodied in an ongoing  substitute or alternative plan) has been made with
     respect  to such  plan,  or the  failure by the  Company  to  continue  the
     Executive's participation therein, or any action by the Company which would
     directly or  indirectly  materially  reduce the  Executive's  participation
     therein;  (vii) the failure by the Company to provide benefits  (including,
     but not  limited  to,  annual  and long term bonus  opportunities),  in the
     aggregate,   that  are  reasonably  comparable  to  the  benefits,  in  the
     aggregate,  being provided for the majority of the other Company  employees
     at the same  employment  level as the  Executive  at the end of the  Window
     Period;  (viii)  the  failure  of the  Company  to  obtain  a  satisfactory
     agreement  from any  successor or assign of the Company to assume and agree
     to perform  this  Agreement;  or (ix) any request by the  Company  that the
     Executive  participate in an unlawful act or take any action constituting a
     breach of the Executive's professional standard of conduct.

          (g)  Notice of  Termination.  "Notice  of  Termination"  shall  mean a
     written  notice which (i) indicates the specific  termination  provision in
     this Agreement  relied upon, (ii) to the extent  applicable,  sets forth in
     reasonable  detail the facts and  circumstances  claimed to provide a basis
     for  termination  of the  Executive's  employment  under the  provision  so
     indicated  and (iii) if the Date of  Termination  is other than the date of
     receipt of such notice, specifies the termination date (which date shall be
     not more than thirty days after the giving of such notice).  The failure by
     the  Executive  to set  forth  in the  Notice  of  Termination  any fact or
     circumstance  which contributes to a showing of Good Reason shall not waive
     any  right of the  Executive  hereunder  or  preclude  the  Executive  from
     asserting such fact or  circumstance  in enforcing the  Executive's  rights
     hereunder.

          (h) Window Period. "Window Period" shall mean a ninety (90) day period
     immediately following the Change in Control of the Company.

     2.  Termination in Connection  with a Change in Control.  If (a) during the
period  beginning  on the Change in Control and  continuing  for three (3) years
thereafter,  the Company shall terminate the Executive's  employment  other than
for Cause, death or Disability,  or the Executive shall terminate employment for
Good  Reason  (which  shall  be  communicated  by the  Executive  by  Notice  of
Termination to the Company); or (b) during the Window Period the Executive shall
terminate employment without reason, then

          (i) The  Company  shall  pay to the  Executive  in a lump  sum in cash
     within fifteen calendar days after the Date of Termination the aggregate of
     the amounts set forth in clauses A, B and C below:

               A. the sum of (1) the Executive's  annual base salary through the
          Date of  Termination  to the  extent  not  theretofore  paid,  (2) the
          product of (x) the greater of the target bonus currently in effect for
          the  Executive  or the  average  of the  actual  bonuses  paid  to the
          Executive  for the three years  ending  prior to the year in which the
          Date of Termination  occurs (the "Minimum  Bonus") and (y) a fraction,
          the  numerator of which is the number of days in the current  calendar
          year through the Date of Termination,  and the denominator of which is
          365 and (3) any  compensation  previously  deferred  by the  Executive
          (together with any accrued interest or earnings thereon) and any other
          nonqualified  benefit plan balances to the extent not theretofore paid
          (the sum of the amounts  described in clauses (1),  (2), and (3) shall
          be hereinafter  referred to as the "Accrued  Obligations");  provided,
          however, that for purposes of this Section 2, annual base salary shall
          include any elective  salary  reductions  in effect for the  Executive
          under any tax qualified or non-qualified  deferred  compensation  plan
          maintained by the Company; and

               B. the amount equal to the product of (1) and (2) where:

                    (1) is the  lesser of (a) three  years or (b) the  number of
               years, rounded to the nearest twelfth (1/12th) of a year, between
               the Date of  Termination  and the  Executive's  attainment of age
               sixty-five (65), and

                    (2) is the sum of (x) the Executive's annual base salary and
               (y) the Minimum Bonus; and

               C. an amount equal to the excess of (a) the actuarial  equivalent
          of  the  benefit  under  the  Company's   qualified   defined  benefit
          retirement plan or such other  qualified  defined benefit pension plan
          in which the Executive  participates,  if any (the "Retirement  Plan")
          (utilizing  actuarial  assumptions  no less favorable to the Executive
          than those in effect under the Company's  Retirement Plan  immediately
          prior  to the  Commencement  Date),  and any  excess  or  supplemental
          retirement  plan in which the Executive  participates  (together,  the
          "SERP")  which  the  Executive   would  receive  if  the   Executive's
          employment  continued  for the  lesser of (a)  three  years or (b) the
          number of years,  rounded to the nearest  twelfth  (1/12th) of a year,
          between the Date of Termination and the Executive's  attainment of age
          sixty-five  (65),  assuming for this purpose that all accrued benefits
          are fully  vested,  and,  assuming that the  Executive's  compensation
          during the duration of employment is the sum of the annual base salary
          and Minimum Bonus over (b) the actuarial equivalent of the Executive's
          actual benefit (paid or payable),  if any,  under the Retirement  Plan
          and the SERP as of the Date of Termination;  provided,  however,  that
          such  determination  shall  also  take  into  account,  to the  extent
          applicable,  any early  retirement  subsidy,  based on the Executive's
          age,  service or both,  for the  additional  service  and age that the
          Executive would have realized if the Executive  remained  employed for
          the period described above in this subparagraph;

               (ii) any  restricted  stock,  stock  options  and any other stock
          awards  under any  Company  sponsored  plan or  arrangement  that were
          outstanding  immediately  prior to the Commencement Date ("Prior Stock
          Awards") shall become  immediately vested and/or  exercisable,  as the
          case may be;

               (iii) for the period  which is the  lesser of (a) three  years or
          (b) the number of years,  rounded to the nearest twelfth (1/12th) of a
          year,  between the Date of Termination and the Executive's  attainment
          of age  sixty-five  (65),  or such longer period as may be provided by
          the terms of the appropriate plan,  program,  practice or policy,  the
          Company  shall   continue   benefits  to  the  Executive   and/or  the
          Executive's  family  at least  equal to those  which  would  have been
          provided to them in  accordance  with the welfare,  fringe,  change of
          control  protection,  incentive,  vacation and other  similar  benefit
          plans,  practices,  policies and programs  provided by the Company and
          its  affiliated  entities  (including,  without  limitation,  medical,
          prescription,   dental,   disability,   employee  life,   group  life,
          accidental death and travel accident  insurance plans and programs) to
          the  extent  applicable  generally  to other  peer  executives  of the
          Company and its affiliated  entities as if the Executive's  employment
          had not been terminated or, if more favorable to the Executive,  as in
          effect  generally  at any time  thereafter  with respect to other peer
          executives  of the  Company  and its  affiliated  companies  and their
          families;  provided, however, that if the Executive becomes reemployed
          with  another  employer  and is eligible  to receive  medical or other
          welfare benefits under another employer provided plan, the medical and
          other welfare  benefits  described  herein shall be secondary to those
          provided  under such  other  plan  during  such  applicable  period of
          eligibility. For purposes of determining eligibility (but not the time
          of  commencement  of benefits) of the Executive  for retiree  benefits
          pursuant  to  such  plans,  practices,   programs  and  policies,  the
          Executive  shall  be  considered  to have  remained  employed  for the
          duration  of  employment  after  the Date of  Termination  and to have
          retired on the last day of such period; and

               (iv) to the extent not theretofore paid or provided,  the Company
          shall  timely  pay or provide to the  Executive  any other  amounts or
          benefits  required to be paid or provided  or which the  Executive  is
          entitled  to receive  under any plan,  program,  policy or practice or
          contract or  agreement  of the Company and its  affiliated  companies,
          excluding any severance  plan or policy except to the extent that such
          plan or policy provides, in accordance with its terms, benefits with a
          value in excess of the benefits  payable to the  Executive  under this
          Section 2, (such  other  amounts  and  benefits  shall be  hereinafter
          referred to as the "Other Benefits").

     Notwithstanding  anything  contained in this Agreement to the contrary,  if
     the Executive's employment is terminated before a Change in Control and the
     Executive  reasonably  demonstrates  that such  termination  (i) was at the
     request of a third  party who has  indicated  an  intention  or taken steps
     reasonably calculated to effect a "Change in Control" and who effectuates a
     "Change in Control" or (ii)  otherwise  occurred in connection  with, or in
     anticipation of, a "Change in Control" which actually occurs,  then for all
     purposes of this Agreement,  the date of a "Change in Control" with respect
     to the Executive shall mean the date immediately  prior to the date of such
     termination of the Executive's employment.

     3.  Termination.  Except as  otherwise  provided  in the last  sentence  of
Section 2, this Agreement shall automatically  terminate upon the termination of
employment of the Executive, for any reason, prior to a Change in Control.

     4. Full Settlement.  After a Change in Control, the Company's obligation to
make the payments  provided for in this  Agreement  and otherwise to perform its
obligations  hereunder  shall  not be  affected  by any  set-off,  counterclaim,
recoupment,  defense or other claim,  right or action which the Company may have
against the Executive or others. In no event shall the Executive be obligated to
seek  other  employment  or take any other  action by way of  mitigation  of the
amounts  payable to the Executive  under any of the provisions of this Agreement
and such amounts shall not be reduced whether or not the Executive obtains other
employment.  The Company agrees to pay as incurred, to the full extent permitted
by law, all legal fees and expenses which the Executive may reasonably  incur as
a result of any non-frivolous contest (regardless of the outcome thereof) by the
Company,  the  Executive  or others of the  validity  or  enforceability  of, or
liability under, any provision of this Agreement or any guarantee of performance
thereof  (including as a result of any contest by the Executive about the amount
of any payment  pursuant to this  Agreement),  plus in each case interest on any
delayed  payment  at  the  applicable  Federal  rate  provided  for  in  Section
7872(f)(2)(A) of the Internal Revenue Code of 1986, as amended (the "Code").

     5. Successors.

          (a) This  Agreement is personal to the Executive and without the prior
     written  consent of the Company  shall not be  assignable  by the Executive
     otherwise  than by  will or the  laws of  descent  and  distribution.  This
     Agreement  shall  inure  to  the  benefit  of  and  be  enforceable  by the
     Executive's legal representatives.

          (b) This  Agreement  shall inure to the benefit of and be binding upon
     the Company and its successors and assigns.

          (c)  The  Company  will  require  any  successor  (whether  direct  or
     indirect,  by  purchase,  merger,  consolidation  or  otherwise)  to all or
     substantially  all of the business  and/or  assets of the Company to assume
     expressly and agree to perform this Agreement in the same manner and to the
     same  extent  that the  Company  would be required to perform it if no such
     succession had taken place. As used in this Agreement, "Company" shall mean
     the Company as  hereinbefore  defined  and any  successor  to its  business
     and/or  assets as  aforesaid  which  assumes  and  agrees to  perform  this
     Agreement by operation of law, or otherwise.

     6. Certain Additional Payments by the Company.

          (a) Anything in this  Agreement to the contrary or any  termination of
     this Agreement  notwithstanding and except as provided in subsection (e) of
     this  Section 6, in the event it shall be  determined  that any  payment or
     distribution  or benefit made or provided by the Company or its  affiliates
     to or for the benefit of the Executive  whether  pursuant to this Agreement
     or otherwise,  and determined  without  regard to any  additional  payments
     required under this Section 6 (a "Payment")  would be subject to the excise
     tax imposed by Section 4999 of the Code or any  interest or  penalties  are
     incurred by the Executive with respect to such excise tax (such excise tax,
     together with any such interest and penalties, are hereinafter collectively
     referred to as the "Excise Tax"),  then the Executive  shall be entitled to
     receive an additional payment (a "Gross-Up Payment") in an amount such that
     after  payment by the  Executive  of all taxes  (including  any interest or
     penalties  imposed  with  respect  to  such  taxes),   including,   without
     limitation,  any income taxes (and any interest and penalties  imposed with
     respect  thereto)  and Excise Tax imposed upon the  Gross-Up  Payment,  the
     Executive retains an amount of the Gross-Up Payment equal to the Excise Tax
     imposed upon the Payments.

          (b) Subject to the  provisions  of Section  6(c),  all  determinations
     required  to be made under this  Section 6,  including  whether  and when a
     Gross-Up  Payment is required,  the amount of such Gross-Up Payment and the
     assumptions  to be utilized in arriving at such  determination  and whether
     subsection  (e) is applicable,  shall be made by the Company's  independent
     auditor (the  "Accounting  Firm") which shall provide  detailed  supporting
     calculations  both to the Company and the Executive within 15 business days
     of the receipt of notice from the Executive  that there has been a Payment,
     or such earlier time as is requested by the Company.  All fees and expenses
     of the Accounting  Firm shall be borne solely by the Company.  Any Gross-Up
     Payment,  as  determined  pursuant to this  Section 6, shall be paid by the
     Company to the Executive  within five days of the receipt of the Accounting
     Firm's  determination.  Any  determination  by the Accounting Firm shall be
     binding upon the Company and the Executive.  As a result of the uncertainty
     in the  application  of Section 4999 of the Code at the time of the initial
     determination  by  the  Accounting  Firm  hereunder,  it is  possible  that
     Gross-Up  Payments which will not have been made by the Company should have
     been made ("Underpayment"), consistent with the calculations required to be
     made  hereunder.  In the  event  that the  Company  exhausts  its  remedies
     pursuant to Section 6(c) and the Executive thereafter is required to make a
     payment of any Excise Tax, the Accounting  Firm shall  determine the amount
     of the Underpayment  that has occurred and any such  Underpayment  shall be
     promptly paid by the Company to or for the benefit of the Executive.

          (c) The Executive  shall notify the Company in writing of any claim by
     the Internal Revenue Service that, if successful, would require the payment
     by the Company of the Gross-Up Payment. Such notification shall be given as
     soon as practicable but no later than ten business days after the Executive
     is informed  in writing of such claim and shall  apprise the Company of the
     nature of such claim and the date on which such  claim is  requested  to be
     paid. The Executive shall not pay such claim prior to the expiration of the
     30-day  period  following  the date on which it gives  such  notice  to the
     Company  (or such  shorter  period  ending on the date that any  payment of
     taxes with  respect  to such claim is due).  If the  Company  notifies  the
     Executive in writing prior to the expiration of such period that it desires
     to contest such claim, the Executive shall:

               (i) give the Company any information  reasonably requested by the
          Company relating to such claim,

               (ii) take such action in connection with contesting such claim as
          the Company  shall  reasonably  request in writing  from time to time,
          including,  without  limitation,  accepting legal  representation with
          respect  to such  claim  by an  attorney  reasonably  selected  by the
          Company,

               (iii)   cooperate  with  the  Company  in  good  faith  in  order
          effectively to contest such claim, and

               (iv)  permit  the  Company  to  participate  in  any  proceedings
          relating to such claim;

     provided,  however,  that the Company shall bear and pay directly all costs
     and expenses  (including  additional  interest and  penalties)  incurred in
     connection  with such contest and shall  indemnify  and hold the  Executive
     harmless,  on an  after-tax  basis,  for  any  Excise  Tax  or  income  tax
     (including interest and penalties with respect thereto) imposed as a result
     of  such  representation  and  payment  of  costs  and  expenses.   Without
     limitation  on the foregoing  provisions of this Section 6(c),  the Company
     shall control all proceedings taken in connection with such contest and, at
     its sole option, may pursue or forego any and all  administrative  appeals,
     proceedings,  hearings and conferences with the taxing authority in respect
     of such claim and may, at its sole option,  either  direct the Executive to
     pay the tax  claimed  and sue for a  refund  or  contest  the  claim in any
     permissible manner, and the Executive agrees to prosecute such contest to a
     determination  before any  administrative  tribunal,  in a court of initial
     jurisdiction  and in one or more  appellate  courts,  as the Company  shall
     determine;  provided, however, that if the Company directs the Executive to
     pay such claim and sue for a refund,  the Company  shall advance the amount
     of such  payment  to the  Executive,  on an  interest-free  basis and shall
     indemnify and hold the Executive harmless,  on an after-tax basis, from any
     Excise Tax or income tax  (including  interest or  penalties  with  respect
     thereto)  imposed  with  respect  to such  advance  or with  respect to any
     imputed income with respect to such advance;  and further provided that any
     extension  of the statute of  limitations  relating to payment of taxes for
     the taxable  year of the  Executive  with  respect to which such  contested
     amount is  claimed to be due is limited  solely to such  contested  amount.
     Furthermore,  the  Company's  control  of the  contest  shall be limited to
     issues with respect to which a Gross-Up Payment would be payable  hereunder
     and the Executive  shall be entitled to settle or contest,  as the case may
     be, any other issue  raised by the  Internal  Revenue  Service or any other
     taxing authority.

          (d) If, after the receipt by the  Executive  of an amount  advanced by
     the Company  pursuant to Section 6(c),  the Executive  becomes  entitled to
     receive any refund with respect to such claim, the Executive shall (subject
     to the Company's  complying with the requirements of Section 6(c)) promptly
     pay to the Company the amount of such refund  (together  with any  interest
     paid or credited  thereon after taxes  applicable  thereto).  If, after the
     receipt by the Executive of an amount  advanced by the Company  pursuant to
     Section  6(c),  a  determination  is made that the  Executive  shall not be
     entitled to any refund with  respect to such claim and the Company does not
     notify the  Executive  in writing of its intent to contest  such  denial of
     refund prior to the  expiration of 30 days after such  determination,  then
     such  advance  shall be forgiven and shall not be required to be repaid and
     the amount of such advance shall offset, to the extent thereof,  the amount
     of Gross-Up Payment required to be paid.

          (e)  Notwithstanding  anything  contained  in  this  Section  6 to the
     contrary,  if the present value of the payments made under this  Agreement,
     without  taking into account the Gross-Up  Payment,  is no greater than one
     hundred  and ten  percent  (110%) of the amount  payable  to the  Executive
     assuming the Executive's  payments under this Agreement were limited to the
     maximum amount that could be payable without  application of the excise tax
     imposed  by  Section  4999 of the Code  (the  "Section  4999  Limit"),  the
     Executive's payments shall be limited to the Section 4999 Limit.

     7. Miscellaneous.

          (a) This  Agreement  shall be governed by and  construed in accordance
     with the laws of Indiana,  without  reference to  principles of conflict of
     laws. The captions of this Agreement are not part of the provisions  hereof
     and shall have no force,  or effect.  This  Agreement may not be amended or
     modified  otherwise  than by a written  agreement  executed  by the parties
     hereto or their respective successors and legal representatives.

          (b) All notices and other communications hereunder shall be in writing
     and shall be given by hand  delivery to the other party or by registered or
     certified mail,  return receipt  requested,  postage prepaid,  addressed as
     follows:

                           If to the Executive:
                           Niel C. Ellerbrook
                           Chair, President and Chief Executive Officer
                           Vectren Corporation
                           20 N.W. Fourth Street
                           Evansville, Indiana  47741-0001

                           If to the Company:
                           Attention: Chair of the Compensation and Benefits
                              Committee of the Board of Directors
                           Vectren Corporation
                           20 N.W. Fourth Street
                           Evansville, Indiana  47741-0001

     or to such other address as either party shall have  furnished to the other
     in writing in  accordance  herewith.  Notice  and  communications  shall be
     effective when actually received by the addressee,

          (c)  The  invalidity  or  unenforceability  of any  provision  of this
     Agreement  shall not affect the  validity  or  enforceability  of any other
     provision of this Agreement.

          (d) The  Company may  withhold  from any  amounts  payable  under this
     Agreement such Federal,  state, local or foreign taxes as shall be required
     to be withheld pursuant to any applicable law or regulation.

          (e) On and after the Commencement Date, this Agreement shall supersede
     any other agreement  between the parties with respect to the subject matter
     hereof  and any such  agreement  shall be  deemed  terminated  without  any
     remaining obligations of either party thereunder.

          (f) This Agreement  shall not be construed as giving the Executive any
     right of employment or continuing employment with the Company.

     8. Prior Agreements.  This Agreement supersedes any employment agreement or
change in control agreement  previously entered into by the Executive and by the
Company,  its predecessors or other  affiliates.  Executive hereby  acknowledges
that the Executive has received  sufficient  consideration  for  substitution of
this Agreement for any prior employment agreement.

     IN WITNESS  WHEREOF,  the Executive has hereunto set the  Executive's  hand
and, pursuant to the authorization from its Board of Directors,  the Company has
caused  these  presents to be executed in its name on its behalf,  all as of the
day and year first above written.

/S/ Niel C. Ellerbrook
- ---------------------------------
Niel C. Ellerbrook, the Executive

February 28, 2005

Vectren Corporation


By /S/ Jean L. Wojtowicz
- ---------------------------------
Jean L. Wojtowicz
Chair of the Compensation and Benefits Committee
of Board of Directors

- ------------------------------------
Date: February 28, 2005