VECTREN CORPORATION
                            (an Indiana corporation)

                                  Common Stock

                               PURCHASE AGREEMENT

Dated: February 8, 2001






                                Table of Contents
                                                                            Page

Section 1. Representations and Warranties......................................3

         (a)    Representations and Warranties by the Company..................3
                (i)       Compliance with Registration Requirements............3
                (ii)      Incorporated Documents...............................4
                (iii)     Independent Accountants..............................4
                (iv)      Financial Statements.................................4
                (v)       Capitalization.......................................4
                (vi)      No Material Adverse Changes..........................5
                (vii)     Due Incorporation and Good Standing..................5
                (viii)    Good Standing of Subsidiaries........................5
                (ix)      Authorization of Agreement...........................6
                (x)       Authorization and Description of Securities..........6
                (xi)      The Shareholder Rights Plan..........................6
                (xii)     Absence of Defaults and Conflicts....................6
                (xiii)    Absence of Labor Dispute.............................7
                (xiv)     Absence of Proceedings...............................7
                (xv)      Accuracy of Exhibits.................................7
                (xvi)     Possession of Intellectual Property..................7
                (xvii)    Absence of Further Requirements......................8
                (xviii)   Possession of Licenses and Permits...................8
                (xix)     Title to Property....................................8
                (xx)      Environmental Laws...................................9
                (xxi)     Registration Rights..................................9
                (xxii)    Investment Company Act...............................9
                (xxiii)   Exemption from Public Utility Holding Company Act....9
         (b)    Officer's Certificates.........................................9

Section 2. Sale and Delivery to Underwriters; Closing.........................10

         (a)    Initial Securities............................................10
         (b)    Option Securities.............................................10
         (c)    Payment.......................................................10
         (d)    Denominations; Registration...................................11

Section 3. Covenants of the Company...........................................11

         (a)    Compliance with Securities Regulations and
                        Commission Requests...................................11
         (b)    Filing of Amendments..........................................11
         (c)    Delivery of Registration Statements...........................12
         (d)    Delivery of Prospectuses......................................12
         (e)    Continued Compliance with Securities Laws.....................12
         (f)    Blue Sky Qualifications.......................................12
         (g)    Rule 158......................................................13
         (h)    Use of Proceeds...............................................13
         (i)    Listing.......................................................13
         (j)    Restriction on Sale of Securities.............................13
         (k)    Reporting Requirements........................................13

Section 4. Payment of Expenses................................................13

         (a)    Expenses......................................................13
         (b)    Termination of Agreement......................................14

Section 5. Conditions of Underwriters' Obligations............................14

         (a)    Effectiveness of Registration Statement.......................14
         (b)    Opinion of Counsel for Company................................14
         (c)    Opinion of Counsel for Underwriters...........................15
         (d)    Officers' Certificate.........................................15
         (e)    Accountant's Comfort Letter...................................15
         (f)    Bring-down Comfort Letter.....................................15
         (g)    Consent Letter................................................15
         (h)    Approval of Listing...........................................16
         (i)    Lock-up Agreements............................................16
         (j)    Conditions to Purchase of Option Securities...................16
                (i)       Officers' Certificate...............................16
                (ii)      Opinion of Counsel for Company......................16
                (iii)     Opinion of Counsel for Underwriters.................16
                (iv)      Bring-down Comfort Letter...........................16
         (k)    Additional Documents..........................................16
         (l)    Termination of Agreement......................................17

Section 6. Indemnification....................................................17

         (a)    Indemnification of Underwriters...............................17
         (b)    Indemnification of Company, Directors and Officers............18
         (c)    Actions against Parties; Notification.........................18
         (d)    Settlement without Consent if Failure to Reimburse............19

Section 7. Contribution.......................................................19


Section 8. Representations, Warranties and Agreements to Survive Delivery.....20


Section 9. Termination of Agreement...........................................20

         (a)    Termination; General..........................................20
         (b)    Liabilities...................................................21

Section 10. Default by One or More of the Underwriters........................21


Section 11. Notices...........................................................22


Section 12. Parties...........................................................22


Section 13. GOVERNING LAW AND TIME............................................22


Section 14. Effect of Headings................................................22


         SCHEDULES

                  Schedule A - List of Underwriters......................Sch A-1
                  Schedule B - Significant Subsidiaries..................Sch B-1
                  Schedule C - Pricing Information.......................Sch C-1
                  Schedule D - List of Persons subject to Lock-up........Sch D-1

         EXHIBITS

                  Exhibit A-1-   Form of Opinion of Company's Counsel........A-1
                  Exhibit A-2-   Form of Opinion of Company's
                                    General Counsel..........................A-5
                  Exhibit B-  Form of Lock-up Letter.........................B-1









                               VECTREN CORPORATION
                            (an Indiana corporation)
                                  Common Stock
                            (No Par Value Per Share)

                               PURCHASE AGREEMENT

                                                               February 8, 2001
MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
as Representative of the several Underwriters

c/o  Merrill Lynch & Co.
     Merrill Lynch, Pierce, Fenner & Smith
                 Incorporated
     North Tower
     World Financial Center
     New York, New York  10281-1209

Ladies and Gentlemen:

         Vectren Corporation,  an Indiana corporation (the "Company"),  confirms
its agreement with Merrill Lynch & Co.,  Merrill Lynch,  Pierce,  Fenner & Smith
Incorporated  ("Merrill  Lynch")  and each of the  other  Underwriters  named in
Schedule  A hereto  (collectively,  the  "Underwriters",  which  term shall also
include  any  underwriter  substituted  as  hereinafter  provided  in Section 10
hereof),  for whom Merrill Lynch is acting as Representative  (in such capacity,
the "Representative"), with respect to the issue and sale by the Company and the
purchase  by  the  Underwriters,  acting  severally  and  not  jointly,  of  the
respective  numbers of shares of Common  Stock,  no par value per share,  of the
Company  ("Common  Stock") set forth in said Schedule A, and with respect to the
grant by the Company to the Underwriters,  acting severally and not jointly,  of
the option  described  in Section  2(b)  hereof to  purchase  all or any part of
825,000 additional shares of Common Stock to cover over-allotments,  if any. The
aggregate  5,500,000  shares of Common Stock (the  "Initial  Securities")  to be
purchased  by the  Underwriters  and all or any part of the  825,000  shares  of
Common Stock subject to the option described in Section 2(b) hereof (the "Option
Securities") are herein called, collectively, the "Securities".

         The Company understands that the Underwriters  propose to make a public
offering of the Securities as soon as the  Representative  deems advisable after
this Agreement has been executed and delivered.

         The Company has filed with the Securities and Exchange  Commission (the
"Commission") a registration  statement on Form S-3 (No. 333-53930) covering the
registration of the Securities under the Securities Act of 1933, as amended (the
"1933 Act"),  including  the related  preliminary  prospectus  or  prospectuses.
Promptly after execution and delivery of this Agreement, the Company will either
(i) prepare and file a prospectus in accordance with the provisions of Rule 430A
("Rule 430A") of the rules and regulations of the Commission  under the 1933 Act
(the "1933 Act  Regulations")  and paragraph (b) of Rule 424 ("Rule  424(b)") of
the 1933 Act  Regulations  or (ii) if the  Company has elected to rely upon Rule
434 ("Rule 434") of the 1933 Act  Regulations,  prepare and file a term sheet (a
"Term Sheet") in accordance with the provisions of Rule 434 and Rule 424(b). The
information  included in such  prospectus or in such Term Sheet, as the case may
be,  that was omitted  from such  registration  statement  at the time it became
effective  but that is deemed to be part of such  registration  statement at the
time it became effective  pursuant to (a) paragraph (b) of Rule 430A is referred
to as "Rule 430A Information" or (b) paragraph (d) of Rule 434 is referred to as
"Rule 434 Information." Each prospectus used before such registration  statement
became effective, and any prospectus that omitted, as applicable,  the Rule 430A
Information or the Rule 434 Information,  that was used after such effectiveness
and prior to the  execution and delivery of this  Agreement,  is herein called a
"preliminary  prospectus." Such registration  statement,  including the exhibits
thereto, and schedules thereto at the time it became effective and including the
Rule 430A  Information and the Rule 434  Information,  as applicable,  is herein
called the "Registration  Statement." Any registration  statement filed pursuant
to Rule 462(b) of the 1933 Act  Regulations  is herein  referred to as the "Rule
462(b)  Registration  Statement,"  and after such filing the term  "Registration
Statement"  shall  include the Rule  462(b)  Registration  Statement.  The final
prospectus,  including the documents  incorporated by reference therein,  in the
form first furnished to the Underwriters for use in connection with the offering
of the Securities,  is herein called the "Prospectus." If Rule 434 is relied on,
the term  "Prospectus"  shall refer to the preliminary  prospectus dated January
19, 2001 and the Term Sheet, and all references in this Agreement to the date of
the  Prospectus  shall mean the date of the Term  Sheet.  For  purposes  of this
Agreement,  all  references  to  the  Registration  Statement,  any  preliminary
prospectus,  the  Prospectus or any Term Sheet or any amendment or supplement to
any of the  foregoing  shall  be  deemed  to  include  the copy  filed  with the
Commission  pursuant to its Electronic  Data  Gathering,  Analysis and Retrieval
system ("EDGAR").

         All references in this Agreement to financial  statements and schedules
and other  information  which is  "contained,"  "included"  or  "stated"  in the
Registration  Statement,  any preliminary prospectus or the Prospectus (or other
references  of like  import)  shall  be  deemed  to mean  and  include  all such
financial  statements and schedules and other  information which is incorporated
by reference in the Registration  Statement,  any preliminary  prospectus or the
Prospectus,  as the case may be, prior to the delivery of the  Prospectus to the
Underwriters for use in connection with the offering of the Securities;  and all
references in this Agreement to amendments or  supplements  to the  Registration
Statement,  any preliminary prospectus or the Prospectus shall be deemed to mean
and include the filing of any  document  under the  Securities  Exchange  Act of
1934,  as amended (the "1934 Act"),  which is  incorporated  by reference in the
Registration  Statement,  such preliminary prospectus or the Prospectus,  as the
case may be,  subsequent to the delivery of the  Prospectus to the  Underwriters
for use in connection with the offering of the Securities.

         Section 1. Representations and Warranties.

         (a)  Representations  and  Warranties  by  the  Company.   The  Company
represents  and warrants to each  Underwriter  as of the date hereof,  as of the
Closing Time referred to in Section 2(c) hereof, and as of each Date of Delivery
(if any) referred to in Section 2(b) hereof,  and agrees with each  Underwriter,
as follows:

                  (i) Compliance  with  Registration  Requirements.  The Company
         meets the  requirements  for use of Form S-3  under  the 1933 Act.  The
         Registration   Statement,   including  any  Rule  462(b)   Registration
         Statement,  has become  effective  under the 1933 Act and no stop order
         suspending the  effectiveness  of the  Registration  Statement has been
         issued under the 1933 Act and no proceedings for that purpose have been
         instituted  or are pending or, to the  knowledge  of the  Company,  are
         contemplated  by the  Commission,  and any  request  on the part of the
         Commission for additional information has been complied with.

                  At the respective times the Registration Statement,  including
         any  Rule  462(b)  Registration   Statement,   and  any  post-effective
         amendments  thereto  (including the filing of the Company's most recent
         Annual Report on Form 10-K with the Commission)  became  effective,  at
         the date of this  Agreement and at the Closing Time (and, if any Option
         Securities are purchased,  at the Date of Delivery),  the  Registration
         Statement and any  amendments  thereto  complied and will comply in all
         material  respects with the  requirements  of the 1933 Act and the 1933
         Act  Regulations  and did not,  do not and will not  contain  an untrue
         statement of a material  fact or omit to state a material fact required
         to be stated  therein or necessary to make the  statements  therein not
         misleading.  Neither the  Prospectus  nor any amendments or supplements
         thereto,  at the date of this Agreement,  at the time the Prospectus or
         any such  amendment or  supplement  thereto is issued or at the Closing
         Time  (and,  if any Option  Securities  are  purchased,  at the Date of
         Delivery),  included, includes or will include an untrue statement of a
         material  fact or omitted,  omits or will omit to state a material fact
         necessary in order to make the statements  therein, in the light of the
         circumstances  under which they were made, not misleading.  If Rule 434
         is used, the Company will comply with the  requirements of Rule 434 and
         the  Prospectus  shall not be "materially  different",  as such term is
         used in Rule 434,  from the  prospectus  included  in the  Registration
         Statement  at the time it became  effective.  The  representations  and
         warranties  in this  subsection  shall  not apply to  statements  in or
         omissions from the  Registration  Statement or the  Prospectus  made in
         reliance  upon and in  conformity  with  information  furnished  to the
         Company in writing by any  Underwriter  through Merrill Lynch expressly
         for use in the Registration Statement or the Prospectus.

                  Each  preliminary  prospectus and the prospectus filed as part
         of the  Registration  Statement as  originally  filed or as part of any
         amendment  thereto,  or filed  pursuant to Rule 424 under the 1933 Act,
         complied  when so  filed  in all  material  respects  with the 1933 Act
         Regulations  and  each   preliminary   prospectus  and  the  Prospectus
         delivered to the  Underwriters for use in connection with this offering
         was identical to the  electronically  transmitted  copies thereof filed
         with the Commission  pursuant to EDGAR,  except to the extent permitted
         by Regulation S-T.

                  (ii)  Incorporated  Documents.  The documents  incorporated or
         deemed to be  incorporated by reference in the  Registration  Statement
         and the  Prospectus,  at the time they were or hereafter are filed with
         the Commission,  complied and will comply in all material respects with
         the  requirements  of the 1934 Act and the rules and regulations of the
         Commission  thereunder  (the "1934 Act  Regulations"),  and,  when read
         together with the other information in the Prospectus,  at the time the
         Registration  Statement or any amendment thereto became  effective,  at
         the date of this Agreement, at the time the Prospectus or any amendment
         or  supplement  thereto was issued and at the  Closing  Time and at the
         Date of  Delivery,  did  not,  do not and will not  contain  an  untrue
         statement of a material  fact or omit to state a material fact required
         to be stated  therein or necessary to make the  statements  therein not
         misleading.

                  (iii)  Independent  Accountants.   The  accountants  who  have
         certified  certain  consolidated  financial  statements  and supporting
         schedules included in the Registration Statement and the Prospectus are
         independent public accountants as required by the 1933 Act and the 1933
         Act Regulations.

                  (iv)  Financial   Statements.   The   consolidated   financial
         statements  included in the Registration  Statement and the Prospectus,
         together  with the  related  schedules  and notes,  present  fairly the
         financial  position of the Company  and its  consolidated  subsidiaries
         and, if  applicable,  such other  entities,  as the case may be, at the
         dates indicated and the statement of operations,  stockholders'  equity
         and cash flows of the Company and its consolidated subsidiaries and, if
         applicable,  such other  entities,  as the case may be, for the periods
         specified; said consolidated financial statements have been prepared in
         conformity  with  generally  accepted  accounting  principles  ("GAAP")
         applied on a consistent  basis  throughout  the periods  involved.  The
         supporting  schedules  included in the  Registration  Statement and the
         Prospectus  present  fairly in  accordance  with  GAAP the  information
         required to be stated  therein.  The  selected  financial  data and the
         summary financial  information  included in the Registration  Statement
         and the  Prospectus  present fairly the  information  shown therein and
         have been  compiled  on a basis  consistent  with  that of the  audited
         consolidated   financial   statements   included  in  the  Registration
         Statement and the Prospectus.  The pro forma  financial  statements and
         the related notes thereto  included in the  Registration  Statement and
         the Prospectus present fairly the information shown therein,  have been
         prepared in accordance with the Commission's  rules and guidelines with
         respect  to pro  forma  financial  statements  and have  been  properly
         compiled on the bases described  therein,  and the assumptions  used in
         the preparation thereof are reasonable and the adjustments used therein
         are appropriate to give effect to the  transactions  and  circumstances
         referred to therein.

                  (v)  Capitalization.  The  authorized,  issued and outstanding
         capital  stock of the Company is as set forth in the  Prospectus in the
         column entitled "Actual" under the caption "Capitalization" (except for
         subsequent issuances, if any, pursuant to this Agreement or pursuant to
         the  exercise  of options  referred to in the  Prospectus).  All of the
         issued and outstanding shares of capital stock of the Company have been
         duly   authorized   and   validly   issued   and  are  fully  paid  and
         non-assessable.  None of the outstanding shares of capital stock of the
         Company was issued in  violation  of the  preemptive  or other  similar
         rights of any securityholder of the Company.

                  (vi) No Material Adverse  Changes.  Since the respective dates
         as of which information is given in the Registration  Statement and the
         Prospectus,  except as otherwise stated therein,  (A) there has been no
         material adverse change in the condition, financial or otherwise, or in
         the earnings, business affairs or business prospects of the Company and
         its subsidiaries  considered as one enterprise,  whether or not arising
         in the ordinary course of business (a "Material Adverse  Effect"),  (B)
         there have been no  transactions  entered into by the Company or any of
         its subsidiaries,  other than those in the ordinary course of business,
         which are  material  with  respect to the Company and its  subsidiaries
         considered  as one  enterprise,  and (C) except for  regular  quarterly
         dividends on the Common Stock in amounts per share that are  consistent
         with past practice,  there has been no dividend or  distribution of any
         kind declared,  paid or made by the Company on any class of its capital
         stock.

                  (vii) Due  Incorporation  and Good  Standing.  The Company has
         been duly  incorporated and is validly existing as a corporation  under
         the laws of the State of Indiana and has power and authority (corporate
         and other) to own,  lease and operate its properties and to conduct its
         business as described in the  Prospectus  and to enter into and perform
         its obligations under this Agreement; and the Company is duly qualified
         as a foreign  corporation to transact  business and is in good standing
         in each other  jurisdiction  in which such  qualification  is required,
         whether  by reason of the  ownership  or  leasing  of  property  or the
         conduct of business, except where the failure so to qualify or to be in
         good standing would not result in a Material Adverse Effect.

                  (viii)  Good  Standing  of  Subsidiaries.   Each  "significant
         subsidiary"  of the  Company  (as such term is  defined in Rule 1-02 of
         Regulation   S-X)  (each  a   "Subsidiary"   and,   collectively,   the
         "Subsidiaries")  is set forth on Schedule B and has been duly organized
         and is  validly  existing  as a  corporation  in good  standing,  where
         applicable,  under the laws of the  jurisdiction of its  incorporation,
         has power and authority (corporate and other) to own, lease and operate
         its  properties  and  to  conduct  its  business  as  described  in the
         Prospectus and is duly  qualified as a foreign  corporation to transact
         business  and is in good  standing in each  jurisdiction  in which such
         qualification  is  required,  whether  by  reason of the  ownership  or
         leasing of  property  or the  conduct  of  business,  except  where the
         failure so to qualify or to be in good  standing  would not result in a
         Material  Adverse  Effect.   Except  as  otherwise   disclosed  in  the
         Registration  Statement  and  the  Prospectus,  all of the  issued  and
         outstanding  shares of capital stock of each  Subsidiary have been duly
         authorized and validly issued,  are fully paid and  non-assessable  and
         are owned by the Company,  directly or through  subsidiaries,  free and
         clear of any security interest,  mortgage,  pledge, lien,  encumbrance,
         claim or equity. None of the outstanding shares of capital stock of any
         Subsidiary  was issued in violation of the preemptive or similar rights
         of any securityholder of such Subsidiary.  The only subsidiaries of the
         Company are (a) the subsidiaries  listed in the Registration  Statement
         and (b) certain other subsidiaries  which,  considered in the aggregate
         as a single  Subsidiary,  do not constitute a "significant  subsidiary"
         (as defined in Rule 1-02 of Regulation S-X).

                  (ix) Authorization of Agreement.  This Agreement has been duly
         authorized, executed and delivered by the Company.

                  (x)   Authorization   and   Description  of  Securities.   The
         Securities  have  been duly  authorized  for  issuance  and sale to the
         Underwriters  pursuant to this Agreement and, when issued and delivered
         by the  Company  pursuant  to this  Agreement  against  payment  of the
         consideration  set forth herein,  will be validly issued and fully paid
         and  non-assessable.  No holder of the  Securities  will be  subject to
         personal  liability  by reason of being such a holder.  The issuance of
         the Securities is not subject to the preemptive or other similar rights
         of any securityholder of the Company.  The Common Stock conforms to all
         statements  relating  thereto  contained  in the  Prospectus  and  such
         description  conforms  to the  rights  set  forth  in  the  instruments
         defining the same.

                  (xi) The  Shareholders  Rights Plan. The  Shareholders  Rights
         Agreement  dated  as of  October  21,  1999  between  the  Company  and
         EquiServe Trust Company, N.A., as Rights Agent (the "Rights Agreement")
         has been duly  authorized,  executed  and  delivered by the Company and
         constitutes a valid and legally binding agreement,  enforceable against
         the   Company   in   accordance   with  its  terms,   subject,   as  to
         enforceability,  to bankruptcy,  insolvency,  reorganization  and other
         laws of  general  applicability  relating  to or  affecting  creditors'
         rights  and to general  equity  principles,  and the  rights  under the
         Rights  Agreement to which holders of the  Securities  will be entitled
         have been duly authorized and validly issued.

                  (xii) Absence of Defaults and  Conflicts.  Neither the Company
         nor any of its  subsidiaries  is in violation of its charter or by-laws
         (or other organizational documents) or in default in the performance or
         observance  of  any  obligation,   agreement,   covenant  or  condition
         contained in any contract, indenture,  mortgage, deed of trust, loan or
         credit agreement, note, lease or other agreement or instrument to which
         the Company or any of its subsidiaries is a party or by which it or any
         of them may be bound,  or to which any of the property or assets of the
         Company or any  subsidiary is subject  (collectively,  "Agreements  and
         Instruments"),  except  for such  defaults  that  would not result in a
         Material  Adverse  Effect.  The execution,  delivery and performance of
         this Agreement and the  consummation of the  transactions  contemplated
         herein and in the Registration  Statement and the Prospectus (including
         the  issuance  and sale of the  Securities  and the use of the proceeds
         from the sale of the  Securities as described in the  Prospectus  under
         the caption "Use of Proceeds")  and  compliance by the Company with its
         obligations  hereunder  have  been  duly  authorized  by all  necessary
         corporate  action and do not and will not,  whether with or without the
         giving  of  notice  or  passage  of  time  or  both,  conflict  with or
         constitute  a breach  of, or  default or  Repayment  Event (as  defined
         below)  under,  or result in the  creation or  imposition  of any lien,
         charge or encumbrance upon any assets,  properties or operations of the
         Company or any subsidiary  pursuant to, the Agreements and Instruments,
         nor will such action result in any  violation of the  provisions of the
         charter or by-laws (or other  organizational  documents) of the Company
         or any subsidiary or any applicable  law,  statute,  rule,  regulation,
         judgment,   order,  writ  or  decree  of  any  government,   government
         instrumentality or court, domestic or foreign, having jurisdiction over
         the Company or any  subsidiary  or any of their  assets,  properties or
         operations.  As used  herein,  a  "Repayment  Event" means any event or
         condition  which  gives  the  holder of any  note,  debenture  or other
         evidence of indebtedness (or any person acting on such holder's behalf)
         the right to require the repurchase,  redemption or repayment of all or
         a portion of such indebtedness by the Company or any subsidiary.

                  (xiii)  Absence of Labor  Dispute.  No labor  dispute with the
         employees of the Company or any subsidiary  exists or, to the knowledge
         of the  Company,  is  imminent,  and the  Company  is not  aware of any
         existing or imminent  labor  disturbance by the employees of any of its
         or any  subsidiary's  principal  suppliers,  customers or  contractors,
         which,  in either  case,  may  reasonably  be  expected  to result in a
         Material Adverse Effect.

                  (xiv) Absence of Proceedings. Except as otherwise disclosed in
         the Registration Statement or the Prospectus, there is no action, suit,
         proceeding,  inquiry or investigation before or brought by any court or
         governmental agency or body, domestic or foreign,  now pending,  or, to
         the  knowledge of the  Company,  threatened,  against or affecting  the
         Company or any subsidiary, (A) which is required to be disclosed in the
         Registration  Statement  and the  Prospectus  (other than as  disclosed
         therein),  or (B)  which  may  reasonably  be  expected  to result in a
         Material  Adverse  Effect,  or (C) which may  reasonably be expected to
         materially  and adversely  affect the assets,  properties or operations
         thereof or the  consummation of the  transactions  contemplated in this
         Agreement  or  the  performance  by  the  Company  of  its  obligations
         hereunder.   The  aggregate  of  all  pending  legal  or   governmental
         proceedings  to which the  Company or any  subsidiary  is a party or of
         which any of their respective  assets,  properties or operations is the
         subject which are not described in the  Registration  Statement and the
         Prospectus,  including  ordinary routine  litigation  incidental to the
         business, would not result in a Material Adverse Effect.

                  (xv) Accuracy of Exhibits. There are no contracts or documents
         which are required to be described in the Registration Statement or the
         Prospectus or the documents  incorporated by reference therein or to be
         filed as exhibits thereto which have not been so described and filed as
         required.

                  (xvi) Possession of Intellectual Property. The Company and its
         subsidiaries  own or  possess,  or can  acquire  on  reasonable  terms,
         adequate  patents,  patent rights,  licenses,  inventions,  copyrights,
         know-how   (including  trade  secrets  and  other   unpatented   and/or
         unpatentable  proprietary  or  confidential  information,   systems  or
         procedures),   trademarks,   service   marks,   trade  names  or  other
         intellectual property (collectively, "Intellectual Property") necessary
         to carry on the business now operated by them,  and neither the Company
         nor any of its  subsidiaries  has  received  any notice or is otherwise
         aware of any infringement of or conflict with asserted rights of others
         with  respect  to  any  Intellectual   Property  or  of  any  facts  or
         circumstances  which would render any Intellectual  Property invalid or
         inadequate  to  protect  the  interest  of  the  Company  or any of its
         subsidiaries  therein,  and  which  infringement  or  conflict  (if the
         subject of any unfavorable  decision,  ruling or finding) or invalidity
         or inadequacy,  singly or in the aggregate,  may reasonably be expected
         to result in a Material Adverse Effect.

                  (xvii)  Absence of Further  Requirements.  No filing with,  or
         authorization,   approval,   consent,  license,  order,   registration,
         qualification  or decree of,  any court or  governmental  authority  or
         agency,  domestic  (whether  federal,  state or local) or  foreign,  is
         necessary  or  required  for  the  performance  by the  Company  of its
         obligations  hereunder,  in connection  with the offering,  issuance or
         sale  of  the  Securities   hereunder  or  the   consummation   of  the
         transactions  contemplated by this Agreement,  except such as have been
         already  obtained or as may be required  under the 1933 Act or the 1933
         Act Regulations or state securities laws.

                  (xviii)   Possession  of  Licenses  and  Permits.   Except  as
         otherwise  disclosed in the  Registration  Statement or the Prospectus,
         the  Company  and its  subsidiaries  possess  such  permits,  licenses,
         approvals,    consents   and   other   authorizations    (collectively,
         "Governmental  Licenses") issued by the appropriate  federal,  state or
         local  regulatory  agencies or bodies necessary to conduct the business
         now operated by them. Except as otherwise disclosed in the Registration
         Statement or the Prospectus,  the Company and its  subsidiaries  are in
         compliance  with the  terms  and  conditions  of all such  Governmental
         Licenses, except where the failure so to comply would not, singly or in
         the aggregate, result in a Material Adverse Effect. Except as otherwise
         disclosed in the Registration  Statement or the Prospectus,  all of the
         Governmental  Licenses  are valid and in full force and effect,  except
         when the  invalidity  of such  Governmental  Licenses or the failure of
         such  Governmental  Licenses  to be in full force and effect  would not
         result in a Material Adverse Effect.  Except as otherwise  disclosed in
         the Registration  Statement or the Prospectus,  neither the Company nor
         any of its subsidiaries has received any notice of proceedings relating
         to the revocation or  modification  of any such  Governmental  Licenses
         which,  singly or in the  aggregate,  if the subject of an  unfavorable
         decision, ruling or finding, would result in a Material Adverse Effect.

                  (xix) Title to Property. The Company and its subsidiaries have
         good and marketable title to all real property owned by the Company and
         its  subsidiaries and good title to all other properties owned by them,
         in each case, free and clear of all mortgages, pledges, liens, security
         interests,  claims,  restrictions or  encumbrances of any kind,  except
         such  as (a)  are  described  in the  Registration  Statement  and  the
         Prospectus or (b) do not, singly or in the aggregate, materially affect
         the value of such property and do not  interfere  with the use made and
         proposed  to be made  of such  property  by the  Company  or any of its
         subsidiaries.  All of the leases and subleases material to the business
         of the Company and its subsidiaries,  considered as one enterprise, and
         under which the  Company or any of its  subsidiaries  holds  properties
         described in the Registration Statement and the Prospectus, are in full
         force and effect,  and neither the Company nor any  subsidiary  has any
         notice  of any  material  claim of any sort that has been  asserted  by
         anyone adverse to the rights of the Company or any subsidiary under any
         of the leases or subleases mentioned above, or affecting or questioning
         the  rights  of  the  Company  or  such  subsidiary  to  the  continued
         possession of the leased or subleased  premises under any such lease or
         sublease.

                  (xx)   Environmental   Laws.   Except  as   described  in  the
         Registration  Statement  or the  Prospectus  and  except as would  not,
         singly or in the aggregate,  result in a Material  Adverse Effect,  (A)
         neither the Company nor any of its  subsidiaries is in violation of any
         federal,  state,  local or  foreign  statute,  law,  rule,  regulation,
         ordinance,  code,  policy  or rule of  common  law or any  judicial  or
         administrative   interpretation  thereof,  including  any  judicial  or
         administrative  order,  consent,   decree  or  judgment,   relating  to
         pollution or protection of human health,  the  environment  (including,
         without  limitation,  ambient air,  surface  water,  groundwater,  land
         surface  or  subsurface   strata)  or  wildlife,   including,   without
         limitation,  laws and regulations relating to the release or threatened
         release  of  chemicals,   pollutants,   contaminants,   wastes,   toxic
         substances,  hazardous  substances,  petroleum  or  petroleum  products
         (collectively,   "Hazardous   Materials")   or  to   the   manufacture,
         processing,  distribution, use, treatment, storage, disposal, transport
         or  handling  of  Hazardous  Materials  (collectively,   "Environmental
         Laws"),  (B)  the  Company  and  its  subsidiaries  have  all  permits,
         authorizations    and   approvals   required   under   any   applicable
         Environmental Laws and are each in compliance with their  requirements,
         (C) there are no pending or  threatened  administrative,  regulatory or
         judicial  actions,  suits,  demands,  demand  letters,  claims,  liens,
         notices of  noncompliance  or violation,  investigation  or proceedings
         relating  to any  Environmental  Law  against the Company or any of its
         subsidiaries  and (D) there are no events or  circumstances  that might
         reasonably  be expected  to form the basis of an order for  clean-up or
         remediation,  or an action,  suit or proceeding by any private party or
         governmental body or agency, against or affecting the Company or any of
         its subsidiaries  relating to Hazardous  Materials or any Environmental
         Laws.

                  (xxi)   Registration   Rights.   There  are  no  persons  with
         registration  rights or other  similar  rights  to have any  securities
         registered on the Registration Statement or otherwise registered by the
         Company under the 1933 Act.

                  (xxii)  Investment  Company  Act. The Company is not, and upon
         the issuance and sale of the Securities as herein  contemplated and the
         application  of  the  net  proceeds   therefrom  as  described  in  the
         Prospectus   will  not  be,  an  "investment   company"  or  an  entity
         "controlled"  by an "investment  company" (as such terms are defined in
         the Investment Company Act of 1940, as amended (the "1940 Act")).

                  (xxiii)  Exemption  from Public Utility  Holding  Company Act.
         Neither the Company nor Vectren  Utility  Holdings,  Inc. is subject to
         the  provisions of the Public Utility  Holding  Company Act of 1935, as
         amended (the "1935 Act").

         (b) Officer's  Certificates.  Any certificate  signed by any officer of
the Company or any of its  subsidiaries  delivered to the  Representative  or to
counsel for the Underwriters  shall be deemed a  representation  and warranty by
the Company to each Underwriter as to the matters covered thereby.

         Section 2. Sale and Delivery to Underwriters; Closing.

         (a)  Initial  Securities.  On  the  basis  of the  representations  and
warranties  herein contained and subject to the terms and conditions  herein set
forth,  the  Company  agrees  to  sell to each  Underwriter,  severally  and not
jointly,  and each  Underwriter,  severally and not jointly,  agrees to purchase
from the Company,  at the price per share set forth in Schedule C, the number of
Initial   Securities  set  forth  in  Schedule  A  opposite  the  name  of  such
Underwriter,  plus any  additional  number  of  Initial  Securities  which  such
Underwriter  may become  obligated  to purchase  pursuant to the  provisions  of
Section 10 hereof.

         (b) Option Securities. In addition, on the basis of the representations
and warranties  herein contained and subject to the terms and conditions  herein
set forth,  the Company hereby grants an option to the  Underwriters,  severally
and not jointly,  to purchase all or any portion of an additional 825,000 shares
of  Common  Stock at the price per share  set  forth in  Schedule  C,  less,  if
applicable, an amount per share equal to any dividends or distributions declared
by the  Company and  payable on the  Initial  Securities  but not payable on the
Option Securities.  The option hereby granted will expire 30 days after the date
hereof and may be  exercised  in whole or in part from time to time only for the
purpose of covering  over-allotments  which may be made in  connection  with the
offering  and  distribution  of  the  Initial  Securities  upon  notice  by  the
Representative  to the Company setting forth the number of Option  Securities as
to which the several  Underwriters  are then  exercising the option and the time
and date of payment and delivery for such Option  Securities.  Any such time and
date  of  delivery  (a  "Date  of   Delivery")   shall  be   determined  by  the
Representative,  but shall not be later than seven full  business days after the
exercise of said  option,  nor in any event prior to the  Closing  Time.  If the
option is exercised as to all or any portion of the Option  Securities,  each of
the  Underwriters,   acting  severally  and  not  jointly,  will  purchase  that
proportion of the total number of Option  Securities  then being purchased which
the number of Initial  Securities  set forth in Schedule A opposite  the name of
such  Underwriter  bears to the total number of Initial  Securities,  subject in
each case to such adjustments as the Representative in its discretion shall make
to eliminate any sales or purchases of fractional shares.

         (c)  Payment.  Payment of the  purchase  price  for,  and  delivery  of
certificates for, the Initial Securities shall be made at the offices of Brown &
Wood LLP, One World Trade Center,  New York, New York,  10048,  or at such other
place as shall be agreed upon by the  Representative  and the  Company,  at 9:00
A.M. (Eastern time) on the third (fourth,  if the pricing occurs after 4:30 P.M.
(Eastern  time) on any given day)  business  day after the date  hereof  (unless
postponed in accordance  with the  provisions of Section 10), or such other time
not later than ten business  days after such date as shall be agreed upon by the
Representative and the Company (such time and date of payment and delivery being
herein called "Closing Time").

         In addition,  in the event that any or all of the Option Securities are
purchased by the  Underwriters,  payment of the purchase price for, and delivery
of certificates for, such Option Securities shall be made at the above-mentioned
offices,  or at such other place as shall be agreed  upon by the  Representative
and the  Company,  on each Date of Delivery as  specified in the notice from the
Representative to the Company.

         Payment  shall be made to the Company by wire  transfer of  immediately
available funds to a bank account designated by the Company, against delivery to
the  Representative   for  the  respective   accounts  of  the  Underwriters  of
certificates  for the Securities to be purchased by them. It is understood  that
each Underwriter has authorized the  Representative,  for its account, to accept
delivery  of,  receipt  for,  and make  payment of the  purchase  price for, the
Initial  Securities  and the Option  Securities,  if any, which it has agreed to
purchase.   Merrill  Lynch,  individually  and  not  as  representative  of  the
Underwriters,  may (but shall not be obligated  to) make payment of the purchase
price  for the  Initial  Securities  or the  Option  Securities,  if any,  to be
purchased by any  Underwriter  whose funds have not been received by the Closing
Time or the  relevant  Date of  Delivery,  as the case may be, but such  payment
shall not relieve such Underwriter from its obligations hereunder.

         (d)   Denominations;   Registration.   Certificates   for  the  Initial
Securities and the Option Securities, if any, shall be in such denominations and
registered in such names as the  Representative  may request in writing at least
one full  business day before the Closing Time or the relevant Date of Delivery,
as the case may be. The certificates  for the Initial  Securities and the Option
Securities,  if any, will be made available for examination and packaging by the
Representative  in The City of New York not later than 10:00 A.M. (Eastern time)
on the business day prior to the Closing Time or the relevant  Date of Delivery,
as the case may be.

         Section 3.  Covenants of the Company.  The Company  covenants with each
Underwriter as follows:

         (a) Compliance with Securities Regulations and Commission Requests. The
Company, subject to Section 3(b), will comply with the requirements of Rule 430A
or Rule 434, as applicable, and will notify the Representative immediately,  and
confirm  the notice in writing,  (i) when any  post-effective  amendment  to the
Registration  Statement  shall  become  effective,  or  any  supplement  to  the
Prospectus or any amended  Prospectus shall have been filed, (ii) of the receipt
of any comments from the Commission,  (iii) of any request by the Commission for
any  amendment to the  Registration  Statement or any amendment or supplement to
the  Prospectus or for additional  information,  and (iv) of the issuance by the
Commission of any stop order  suspending the  effectiveness  of the Registration
Statement or of any order  preventing or suspending  the use of any  preliminary
prospectus,  or of the  suspension of the  qualification  of the  Securities for
offering or sale in any jurisdiction, or of the initiation or threatening of any
proceedings  for any of such  purposes.  The Company  will  promptly  effect the
filings  necessary  pursuant to Rule 424(b) and will take such steps as it deems
necessary to ascertain  promptly whether the form of prospectus  transmitted for
filing under Rule 424(b) was received for filing by the  Commission  and, in the
event that it was not, it will promptly file such  prospectus.  The Company will
make every  reasonable  effort to prevent the issuance of any stop order and, if
any stop order is issued, to obtain the lifting thereof at the earliest possible
moment.

         (b) Filing of  Amendments.  The  Company  will give the  Representative
notice of its  intention to file or prepare any  amendment  to the  Registration
Statement  (including  any  filing  under  Rule  462(b)),  any Term Sheet or any
amendment,  supplement  or  revision  to either the  prospectus  included in the
Registration  Statement at the time it became  effective  or to the  Prospectus,
will furnish the Representative with copies of any such amendment, supplement or
revision a reasonable  amount of time prior to such  proposed  filing or use, as
the case  may be,  and will  not  file or use any  such  document  to which  the
Representative or counsel for the Underwriters shall object.

         (c) Delivery of Registration  Statements.  The Company has furnished or
will deliver to the  Representative  and counsel for the  Underwriters,  without
charge,  signed copies of the Registration  Statement as originally filed and of
each amendment  thereto  (including  exhibits filed therewith or incorporated by
reference  therein and documents  incorporated  or deemed to be  incorporated by
reference  therein)  and  signed  copies of all  consents  and  certificates  of
experts,  and  will  also  deliver  to the  Representative,  without  charge,  a
conformed  copy of the  Registration  Statement as originally  filed and of each
amendment thereto (without exhibits) for each of the Underwriters. The copies of
the  Registration   Statement  and  each  amendment  thereto  furnished  to  the
Underwriters will be identical to the electronically  transmitted copies thereof
filed with the Commission  pursuant to EDGAR,  except to the extent permitted by
Regulation S-T.

         (d)  Delivery  of  Prospectuses.  The  Company  has  delivered  to each
Underwriter,  without charge,  as many copies of each preliminary  prospectus as
such Underwriter  reasonably  requested,  and the Company hereby consents to the
use of such copies for  purposes  permitted  by the 1933 Act.  The Company  will
furnish  to each  Underwriter,  without  charge,  during  the  period  when  the
Prospectus  is required  to be  delivered  under the 1933 Act or 1934 Act,  such
number  of  copies  of the  Prospectus  (as  amended  or  supplemented)  as such
Underwriter  may  reasonably  request.  The  Prospectus  and any  amendments  or
supplements  thereto  furnished  to the  Underwriters  will be  identical to the
electronically  transmitted copies thereof filed with the Commission pursuant to
EDGAR, except to the extent permitted by Regulation S-T.

         (e) Continued  Compliance with Securities Laws. The Company will comply
with the 1933 Act and the 1933 Act Regulations so as to permit the completion of
the  distribution of the Securities as contemplated in this Agreement and in the
Prospectus.  If at any time when a prospectus  is required by the 1933 Act to be
delivered in connection  with sales of the  Securities  any event shall occur or
condition  shall exist as a result of which it is  necessary,  in the opinion of
counsel  for the  Underwriters  or for the  Company,  to amend the  Registration
Statement or amend or supplement  the  Prospectus  in order that the  Prospectus
will not  include  any untrue  statement  of a material  fact or omit to state a
material fact necessary in order to make the  statements  therein not misleading
in the light of the  circumstances  existing  at the time it is  delivered  to a
purchaser,  or if it shall be necessary,  in the opinion of such counsel, at any
such  time to amend  the  Registration  Statement  or amend  or  supplement  the
Prospectus in order to comply with the  requirements of the 1933 Act or the 1933
Act Regulations, the Company will promptly prepare and file with the Commission,
subject to Section  3(b),  such  amendment or  supplement as may be necessary to
correct such statement or omission or to make the Registration  Statement or the
Prospectus  comply with such  requirements,  and the Company will furnish to the
Underwriters  such  number of  copies of such  amendment  or  supplement  as the
Underwriters may reasonably request.

         (f) Blue Sky Qualifications.  The Company will use its best efforts, in
cooperation  with the  Underwriters,  to qualify the Securities for offering and
sale under the applicable securities laws of such states and other jurisdictions
as the  Representative  may  designate and to maintain  such  qualifications  in
effect  for a period of not less  than one year from the later of the  effective
date of the Registration  Statement and any Rule 462(b) Registration  Statement;
provided,  however,  that the Company shall not be obligated to file any general
consent to service  of  process or to qualify as a foreign  corporation  or as a
dealer in securities in any  jurisdiction  in which it is not so qualified or to
subject itself to taxation in respect of doing business in any  jurisdiction  in
which  it is not  otherwise  so  subject.  In each  jurisdiction  in  which  the
Securities  have been so qualified,  the Company will file such  statements  and
reports as may be required  by the laws of such  jurisdiction  to continue  such
qualification in effect for a period of not less than one year from the later of
the  effective  date  of  the   Registration   Statement  and  any  Rule  462(b)
Registration Statement.

         (g) Rule 158. The Company will timely file such reports pursuant to the
1934  Act  as  are  necessary  in  order  to  make  generally  available  to its
securityholders  as soon as practicable  an earnings  statement for the purposes
of, and to provide the benefits  contemplated  by, the last paragraph of Section
11(a) of the 1933 Act.

         (h) Use of Proceeds.  The Company will use the net proceeds received by
it from the sale of the  Securities  in the manner  specified in the  Prospectus
under "Use of Proceeds".

         (i)  Listing.  The  Company  will use its best  efforts  to effect  the
listing of the Securities on the New York Stock Exchange.

         (j) Restriction on Sale of Securities.  During a period of 90 days from
the date of the  Prospectus,  the Company  will not,  without the prior  written
consent of Merrill  Lynch,  (i) directly or  indirectly,  offer,  pledge,  sell,
contract to sell,  sell any option or contract to purchase,  purchase any option
or contract to sell, grant any option, right or warrant to purchase or otherwise
transfer or dispose of any share of Common Stock or any  securities  convertible
into or exercisable or  exchangeable  for Common Stock or file any  registration
statement  under the 1933 Act with respect to any of the foregoing or (ii) enter
into any swap or any other agreement or any transaction that transfers, in whole
or in part, directly or indirectly, the economic consequence of ownership of the
Common Stock,  whether any such swap or  transaction  described in clause (i) or
(ii)  above  is to be  settled  by  delivery  of  Common  Stock  or  such  other
securities,  in cash or otherwise. The foregoing sentence shall not apply to (A)
the  Securities to be sold  hereunder,  (B) any shares of Common Stock issued by
the Company upon the exercise of any option  outstanding  on the date hereof and
referred  to in the  Prospectus,  or (C) any grants  pursuant  to the  Executive
At-Risk  Compensation Plan duly adopted by the Board of Directors of the Company
on January 24,  2001,  pursuant to which  4,000,000  shares of Common Stock have
been reserved for issuance.

         (k)  Reporting  Requirements.  The Company,  during the period when the
Prospectus is required to be delivered  under the 1933 Act or the 1934 Act, will
file all documents required to be filed with the Commission pursuant to the 1934
Act  within  the  time  periods  required  by the  1934  Act and the  rules  and
regulations of the Commission thereunder.

         Section 4. Payment of Expenses.

         (a)  Expenses.  The  Company  will  pay all  expenses  incident  to the
performance  of  its  obligations  under  this  Agreement,   including  (i)  the
preparation,  printing  and  filing  of the  Registration  Statement  (including
consolidated  financial statements and exhibits) as originally filed and of each
amendment  thereto,   (ii)  the  preparation,   printing  and  delivery  to  the
Underwriters of this Agreement,  any Agreement among Underwriters and such other
documents as may be required in connection  with the offering,  purchase,  sale,
issuance or delivery of the  Securities,  (iii) the  preparation,  issuance  and
delivery of the certificates for the Securities to the  Underwriters,  including
any stock or other transfer taxes and any stamp or other duties payable upon the
sale, issuance or delivery of the Securities to the Underwriters,  (iv) the fees
and disbursements of the Company's counsel,  accountants and other advisors, (v)
the qualification of the Securities under securities laws in accordance with the
provisions of Section 3(f) hereof, including filing fees and the reasonable fees
and disbursements of counsel for the Underwriters in connection therewith and in
connection  with  the  preparation  of the Blue Sky  Survey  and any  supplement
thereto,  (vi) the printing and delivery to the  Underwriters  of copies of each
preliminary prospectus, any Term Sheets and the Prospectus and any amendments or
supplements  thereto,  (vii)  the  preparation,  printing  and  delivery  to the
Underwriters of copies of the Blue Sky Survey and any supplement thereto, (viii)
the fees and expenses of any transfer  agent or registrar for the Securities and
(ix) the fees and  expenses  incurred  in  connection  with the  listing  of the
Securities on the New York Stock Exchange.

         (b)  Termination  of Agreement.  If this Agreement is terminated by the
Representative in accordance with the provisions of Section 5 or Section 9(a)(i)
hereof,   the  Company  shall  reimburse  the  Underwriters  for  all  of  their
out-of-pocket  expenses,  including the  reasonable  fees and  disbursements  of
counsel for the Underwriters.

         Section 5. Conditions of Underwriters' Obligations.  The obligations of
the  several  Underwriters   hereunder  are  subject  to  the  accuracy  of  the
representations  and warranties of the Company  contained in Section 1 hereof or
in  certificates  of any officer of the Company or any subsidiary of the Company
delivered  pursuant to the provisions  hereof, to the performance by the Company
of its covenants and other obligations  hereunder,  and to the following further
conditions:

         (a)   Effectiveness   of  Registration   Statement.   The  Registration
Statement,   including  any  Rule  462(b)  Registration  Statement,  has  become
effective and at Closing Time no stop order suspending the  effectiveness of the
Registration  Statement shall have been issued under the 1933 Act or proceedings
therefor initiated or threatened by the Commission,  and any request on the part
of the Commission for  additional  information  shall have been complied with to
the  reasonable  satisfaction  of  counsel  to the  Underwriters.  A  prospectus
containing the Rule 430A  Information  shall have been filed with the Commission
in accordance  with Rule 424(b) (or a  post-effective  amendment  providing such
information shall have been filed and declared  effective in accordance with the
requirements of Rule 430A) or, if the Company has elected to rely upon Rule 434,
a Term Sheet shall have been filed with the  Commission in accordance  with Rule
424(b).

         (b) Opinion of Counsel for Company. At Closing Time, the Representative
shall have received the favorable opinions,  dated as of Closing Time, of Barnes
& Thornburg,  Indiana counsel for the Company,  and Ronald E. Christian,  Senior
Vice  President,  General  Counsel and  Secretary  of the  Company,  in form and
substance satisfactory to counsel for the Underwriters,  together with signed or
reproduced  copies of such  letters for each of the other  Underwriters,  to the
effect  set forth in  Exhibits  A-1 and A-2  hereto,  respectively,  and to such
further effect as counsel to the Underwriters may reasonably  request (including
opinions of local  counsel with respect to the good  standing of Vectren  Energy
Delivery  of Ohio,  Inc.  and federal  regulatory  counsel  with  respect to the
Company's  exemption from the 1935 Act). Barnes & Thornburg may also state that,
insofar as such opinion  involves  factual  matters,  they have  relied,  to the
extent they deem proper,  upon  certificates  of officers of the Company and its
subsidiaries and certificates of public officials.

         (c)  Opinion  of  Counsel  for  Underwriters.   At  Closing  Time,  the
Representative  shall have received the favorable  opinion,  dated as of Closing
Time, of Brown & Wood LLP, counsel for the  Underwriters,  in form and substance
satisfactory  to the  Representative.  In giving such  opinion  such counsel may
rely, as to all matters governed by the laws of jurisdictions other than the law
of the State of New York and the  federal  law of the  United  States,  upon the
opinions of counsel  satisfactory to the  Representative.  Such counsel may also
state that, insofar as such opinion involves factual matters,  they have relied,
to the extent they deem proper, upon certificates of officers of the Company and
its subsidiaries and certificates of public officials.

         (d) Officers' Certificate.  At Closing Time, there shall not have been,
since the date hereof or since the respective  dates as of which  information is
given in the Prospectus, any material adverse change in the condition, financial
or otherwise, or in the earnings,  business affairs or business prospects of the
Company  and its  subsidiaries  considered  as one  enterprise,  whether  or not
arising in the ordinary course of business,  and the  Representative  shall have
received a certificate  of the President or a Vice  President of the Company and
of the chief financial or chief accounting  officer of the Company,  dated as of
Closing  Time,  to the effect that (i) there has been no such  material  adverse
change,  (ii) the representations and warranties in Section 1(a) hereof are true
and correct with the same force and effect as though expressly made at and as of
Closing Time,  (iii) the Company has complied with all  agreements and satisfied
all  conditions  on its part to be performed or satisfied at or prior to Closing
Time, and (iv) no stop order  suspending the  effectiveness  of the Registration
Statement  has been  issued  and no  proceedings  for  that  purpose  have  been
instituted or are pending or are contemplated by the Commission.

         (e) Accountant's  Comfort Letter.  At the time of the execution of this
Agreement,  the  Representative  shall have received from Arthur  Andersen LLP a
letter   dated  such  date,   in  form  and   substance   satisfactory   to  the
Representative,  together  with signed or  reproduced  copies of such letter for
each of the other  Underwriters,  containing  statements and  information of the
type ordinarily included in accountants'  "comfort letters" to underwriters with
respect to the consolidated financial statements,  both historical and pro forma
and certain financial  information  contained in the Registration  Statement and
the Prospectus.

         (f) Bring-down  Comfort  Letter.  At Closing Time,  the  Representative
shall have received from Arthur Andersen LLP a letter, dated as of Closing Time,
to the effect that they  reaffirm the  statements  made in the letter  furnished
pursuant to  subsection  (e) of this  Section,  except that the  specified  date
referred to shall be a date not more than three  business  days prior to Closing
Time.

         (g) Consent  Letter.  At Closing Time,  the  Representative  shall have
received from PricewaterhouseCoopers LLP a letter, dated as of the Closing Time,
in form and substance  satisfactory to the Representative,  together with signed
or reproduced copies of such letter for each of the other Underwriters, covering
the financial statements of the natural gas distribution  business of The Dayton
Power  and  Light  Company  included  in  the  Registration  Statement  and  the
Prospectus.

         (h) Approval of Listing.  At Closing Time,  the  Securities  shall have
been  approved  for  listing on the New York  Stock  Exchange,  subject  only to
official notice of issuance

         (i)  Lock-up   Agreements.   At  the  date  of  this   Agreement,   the
Representative  shall have  received an agreement  substantially  in the form of
Exhibit B hereto signed by the persons listed on Schedule D hereto.

         (j) Conditions to Purchase of Option Securities.  In the event that the
Underwriters  exercise their option  provided in Section 2(b) hereof to purchase
all or any portion of the Option Securities,  the representations and warranties
of the Company contained herein and the statements in any certificates furnished
by the  Company or any  subsidiary  of the Company  hereunder  shall be true and
correct as of each Date of Delivery and, at the relevant  Date of Delivery,  the
Representative shall have received:

                  (i) Officers' Certificate.  A certificate,  dated such Date of
         Delivery,  of the  President or a Vice  President of the Company and of
         the  chief  financial  or  chief  accounting  officer  of  the  Company
         confirming that the certificate  delivered at the Closing Time pursuant
         to Section  5(d)  hereof  remains  true and  correct as of such Date of
         Delivery.

                  (ii) Opinion of Counsel for Company. The favorable opinions of
         Barnes &  Thornburg,  Indiana  counsel for the  Company,  and Ronald E.
         Christian, Senior Vice President,  General Counsel and Secretary of the
         Company,  in  form  and  substance  satisfactory  to  counsel  for  the
         Underwriters,  dated  such Date of  Delivery,  relating  to the  Option
         Securities  to be purchased  on such Date of Delivery and  otherwise to
         the same effect as the opinion required by Section 5(b) hereof.

                  (iii)  Opinion  of Counsel  for  Underwriters.  The  favorable
         opinion of Brown & Wood LLP, counsel for the  Underwriters,  dated such
         Date of Delivery,  relating to the Option Securities to be purchased on
         such Date of Delivery  and  otherwise to the same effect as the opinion
         required by Section 5(c) hereof.

                  (iv) Bring-down  Comfort Letter. A letter from Arthur Andersen
         LLP, in form and substance satisfactory to the Representative and dated
         such Date of Delivery,  substantially in the same form and substance as
         the letter  furnished  to the  Representative  pursuant to Section 5(f)
         hereof,  except  that  the  "specified  date" in the  letter  furnished
         pursuant to this paragraph shall be a date not more than three business
         days prior to such Date of Delivery.

         (k) Additional Documents. At Closing Time and at each Date of Delivery,
counsel for the  Underwriters  shall have been furnished with such documents and
opinions as they may  require for the purpose of enabling  them to pass upon the
issuance  and sale of the  Securities  as  herein  contemplated,  or in order to
evidence  the  accuracy  of any of the  representations  or  warranties,  or the
fulfillment of any of the  conditions,  herein  contained;  and all  proceedings
taken by the Company in connection  with the issuance and sale of the Securities
as  herein  contemplated  shall be  satisfactory  in form and  substance  to the
Representative and counsel for the Underwriters.

         (l)  Termination  of  Agreement.  If any  condition  specified  in this
Section shall not have been fulfilled when and as required to be fulfilled, this
Agreement,  or,  in  the  case  of  any  condition  to the  purchase  of  Option
Securities,  on a Date  of  Delivery  which  is  after  the  Closing  Time,  the
obligations  of  the  several  Underwriters  to  purchase  the  relevant  Option
Securities,  may be terminated by the Representative by notice to the Company at
any time at or prior to Closing Time or such Date of  Delivery,  as the case may
be, and such  termination  shall be without  liability of any party to any other
party except as provided in Section 4 and except that Sections 1, 6, 7, 8 and 13
shall survive any such termination and remain in full force and effect.

         Section 6. Indemnification.

         (a)  Indemnification  of Underwriters.  The Company agrees to indemnify
and hold harmless  each  Underwriter  and each person,  if any, who controls any
Underwriter  within  the  meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act as follows:

                  (i) against  any and all loss,  liability,  claim,  damage and
         expense whatsoever, as incurred, arising out of any untrue statement or
         alleged   untrue   statement  of  a  material  fact  contained  in  the
         Registration  Statement (or any amendment thereto),  including the Rule
         430A  Information and the Rule 434 Information,  if applicable,  or the
         omission or alleged  omission  therefrom of a material fact required to
         be stated  therein or  necessary  to make the  statements  therein  not
         misleading  or arising out of any untrue  statement  or alleged  untrue
         statement of a material fact included in any preliminary  prospectus or
         the  Prospectus  (or  any  amendment  or  supplement  thereto),  or the
         omission or alleged omission  therefrom of a material fact necessary in
         order to make the statements therein, in the light of the circumstances
         under which they were made, not misleading;

                  (ii) against any and all loss,  liability,  claim,  damage and
         expense whatsoever,  as incurred, to the extent of the aggregate amount
         paid  in  settlement  of  any  litigation,   or  any  investigation  or
         proceeding by any governmental agency or body, commenced or threatened,
         or of any claim  whatsoever  based upon any such  untrue  statement  or
         omission,  or any such alleged untrue  statement or omission;  provided
         that  (subject to Section 6(d) below) any such  settlement  is effected
         with the written consent of the Company; and

                  (iii)  against  any and all  expense  whatsoever,  as incurred
         (including  the fees and  disbursements  of  counsel  chosen by Merrill
         Lynch),  reasonably  incurred in investigating,  preparing or defending
         against any  litigation,  or any  investigation  or  proceeding  by any
         governmental  agency or body,  commenced  or  threatened,  or any claim
         whatsoever  based upon any such untrue  statement or  omission,  or any
         such alleged untrue statement or omission,  to the extent that any such
         expense is not paid under (i) or (ii) above;

         provided, however, that this indemnity agreement shall not apply to any
         loss, liability,  claim, damage or expense to the extent arising out of
         any untrue  statement  or  omission  or  alleged  untrue  statement  or
         omission  made  in  reliance  upon  and  in  conformity   with  written
         information furnished to the Company by any Underwriter through Merrill
         Lynch expressly for use in the Registration Statement (or any amendment
         thereto),  including  the  Rule  430A  Information  and  the  Rule  434
         Information,  if  applicable,  or  any  preliminary  prospectus  or the
         Prospectus (or any amendment or supplement thereto).

         (b)   Indemnification   of  Company,   Directors  and  Officers.   Each
Underwriter  severally  agrees to indemnify and hold  harmless the Company,  its
directors,  each of its officers who signed the Registration Statement, and each
person, if any, who controls the Company within the meaning of Section 15 of the
1933 Act or  Section  20 of the 1934 Act  against  any and all loss,  liability,
claim, damage and expense described in the indemnity contained in subsection (a)
of this  Section,  as incurred,  but only with respect to untrue  statements  or
omissions,  or alleged untrue statements or omissions,  made in the Registration
Statement (or any amendment  thereto),  including the Rule 430A  Information and
the Rule 434 Information,  if applicable,  or any preliminary  prospectus or the
Prospectus  (or any  amendment or  supplement  thereto) in reliance  upon and in
conformity with written information furnished to the Company by such Underwriter
through  Merrill Lynch expressly for use in the  Registration  Statement (or any
amendment  thereto) or such  preliminary  prospectus or the  Prospectus  (or any
amendment or supplement thereto).

         (c) Actions against Parties; Notification. Each indemnified party shall
give notice as promptly as reasonably  practicable to each indemnifying party of
any action  commenced  against it in  respect of which  indemnity  may be sought
hereunder, but failure to so notify an indemnifying party shall not relieve such
indemnifying  party  from  any  liability  hereunder  to  the  extent  it is not
materially  prejudiced as a result thereof and in any event shall not relieve it
from any liability which it may have otherwise than on account of this indemnity
agreement.  In the case of parties  indemnified  pursuant to Section 6(a) above,
counsel to the indemnified  parties shall be selected by Merrill Lynch,  and, in
the case of parties indemnified  pursuant to Section 6(b) above,  counsel to the
indemnified  parties shall be selected by the Company. An indemnifying party may
participate  at its own  expense in the  defense of any such  action;  provided,
however,  that  counsel to the  indemnifying  party shall not  (except  with the
consent of the indemnified  party) also be counsel to the indemnified  party. In
no event shall the indemnifying  parties be liable for fees and expenses of more
than one counsel  (in  addition to any local  counsel)  separate  from their own
counsel  for all  indemnified  parties  in  connection  with any one  action  or
separate but similar or related actions in the same jurisdiction  arising out of
the same general  allegations or  circumstances.  No  indemnifying  party shall,
without  the  prior  written  consent  of the  indemnified  parties,  settle  or
compromise  or  consent  to  the  entry  of any  judgment  with  respect  to any
litigation,  or any  investigation or proceeding by any  governmental  agency or
body,  commenced  or  threatened,  or any claim  whatsoever  in respect of which
indemnification  or contribution could be sought under this Section 6 or Section
7 hereof (whether or not the indemnified parties are actual or potential parties
thereto),  unless  such  settlement,  compromise  or  consent  (i)  includes  an
unconditional  release of each indemnified  party from all liability arising out
of such litigation, investigation, proceeding or claim and (ii) does not include
a statement as to or an admission of fault,  culpability  or a failure to act by
or on behalf of any indemnified party.

         (d) Settlement without Consent if Failure to Reimburse.  If at any time
an indemnified party shall have requested an indemnifying party to reimburse the
indemnified  party for fees and  expenses of counsel,  such  indemnifying  party
agrees that it shall be liable for any settlement of the nature  contemplated by
Section 6(a) (ii) effected without its written consent if (i) such settlement is
entered into more than 45 days after receipt by such  indemnifying  party of the
aforesaid  request,  (ii) such indemnifying  party shall have received notice of
the terms of such  settlement  at least 30 days prior to such  settlement  being
entered into and (iii) such  indemnifying  party shall not have  reimbursed such
indemnified  party in  accordance  with such  request  prior to the date of such
settlement.

         Section 7. Contribution. If the indemnification provided for in Section
6 hereof is for any reason  unavailable to or  insufficient  to hold harmless an
indemnified  party in respect of any  losses,  liabilities,  claims,  damages or
expenses referred to therein,  then each indemnifying  party shall contribute to
the aggregate amount of such losses,  liabilities,  claims, damages and expenses
incurred by such  indemnified  party, as incurred,  (i) in such proportion as is
appropriate to reflect the relative  benefits received by the Company on the one
hand and the  Underwriters on the other hand from the offering of the Securities
pursuant to this Agreement or (ii) if the  allocation  provided by clause (i) is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the  relative  benefits  referred  to in clause  (i) above but also the
relative  fault of the  Company on the one hand and of the  Underwriters  on the
other hand in connection with the statements or omissions which resulted in such
losses, liabilities,  claims, damages or expenses, as well as any other relevant
equitable considerations.

         The relative  benefits  received by the Company on the one hand and the
Underwriters on the other hand in connection with the offering of the Securities
pursuant  to  this  Agreement  shall  be  deemed  to be in the  same  respective
proportions  as the total  net  proceeds  from the  offering  of the  Securities
pursuant to this Agreement (before deducting  expenses)  received by the Company
and the total underwriting  discount received by the Underwriters,  in each case
as set  forth  on the  cover of the  Prospectus,  or,  if Rule 434 is used,  the
corresponding  location on the Term Sheet,  bear to the aggregate initial public
offering price of the Securities as set forth on such cover.

         The relative fault of the Company on the one hand and the  Underwriters
on the other hand shall be  determined  by  reference  to,  among other  things,
whether  any such  untrue or alleged  untrue  statement  of a  material  fact or
omission or alleged  omission to state a material  fact  relates to  information
supplied by the Company or by the Underwriters and the parties' relative intent,
knowledge,  access to  information  and  opportunity  to correct or prevent such
statement or omission.

         The  Company and the  Underwriters  agree that it would not be just and
equitable if contribution pursuant to this Section 7 were determined by pro rata
allocation  (even  if the  Underwriters  were  treated  as one  entity  for such
purpose) or by any other method of allocation which does not take account of the
equitable  considerations  referred  to above in this  Section 7. The  aggregate
amount of losses,  liabilities,  claims,  damages  and  expenses  incurred by an
indemnified  party and  referred  to above in this  Section 7 shall be deemed to
include any legal or other  expenses  reasonably  incurred  by such  indemnified
party in investigating,  preparing or defending  against any litigation,  or any
investigation  or proceeding by any  governmental  agency or body,  commenced or
threatened, or any claim whatsoever based upon any such untrue or alleged untrue
statement or omission or alleged omission.

         Notwithstanding  the provisions of this Section 7, no Underwriter shall
be required to contribute  any amount in excess of the amount by which the total
price at which the Securities  underwritten  by it and distributed to the public
were  offered  to the  public  exceeds  the  amount of any  damages  which  such
Underwriter  has otherwise  been required to pay by reason of any such untrue or
alleged untrue statement or omission or alleged omission.

         No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

         For purposes of this  Section 7, each  person,  if any, who controls an
Underwriter  within  the  meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as such Underwriter, and
each  director  of the  Company,  each  officer  of the  Company  who signed the
Registration Statement, and each person, if any, who controls the Company within
the  meaning  of  Section 15 of the 1933 Act or Section 20 of the 1934 Act shall
have the same rights to contribution as the Company.

         The Underwriters' respective obligations to contribute pursuant to this
Section 7 are  several in  proportion  to the number of Initial  Securities  set
forth opposite their respective names in Schedule A hereto and not joint.

         Section  8.  Representations,  Warranties  and  Agreements  to  Survive
Delivery.  All  representations,  warranties  and  agreements  contained in this
Agreement  or in  certificates  of  officers  of  the  Company  or  any  of  its
subsidiaries submitted pursuant hereto, shall remain operative and in full force
and  effect,  regardless  of  any  investigation  made  by or on  behalf  of any
Underwriter or controlling person, or by or on behalf of the Company,  and shall
survive delivery of the Securities to the Underwriters.

         Section 9. Termination of Agreement.

         (a)  Termination;   General.  The  Representative  may  terminate  this
Agreement, by notice to the Company, at any time at or prior to Closing Time (i)
if there has been,  since the time of execution  of this  Agreement or since the
respective  dates  as of which  information  is  given  in the  Prospectus,  any
material  adverse  change in the  condition,  financial or otherwise,  or in the
earnings,  business  affairs  or  business  prospects  of the  Company  and  its
subsidiaries  considered  as  one  enterprise,  whether  or not  arising  in the
ordinary course of business,  or (ii) if there has occurred any material adverse
change in the  financial  markets  in the  United  States  or the  international
financial  markets,  any outbreak of hostilities or escalation  thereof or other
calamity or crisis or any change or development  involving a prospective  change
in national or international  political,  financial or economic  conditions,  in
each  case the  effect of which is such as to make it,  in the  judgment  of the
Representative,  impracticable to market the Securities or to enforce  contracts
for the sale of the  Securities,  or (iii) if trading in any  securities  of the
Company,  Indiana Gas Company, Inc. or Southern Indiana Gas and Electric Company
has been  suspended  or  materially  limited  by the  Commission  or a  national
securities  exchange or if trading  generally on the American  Stock Exchange or
the New York Stock Exchange or in the Nasdaq  National Market has been suspended
or materially limited, or minimum or maximum prices for trading have been fixed,
or maximum ranges for prices have been required,  by any of said exchanges or by
such  system  or by  order  of  the  Commission,  the  National  Association  of
Securities  Dealers,  Inc.  or any other  governmental  authority,  or (iv) if a
banking moratorium has been declared by either Federal or New York authorities.

         (b)  Liabilities.  If this  Agreement  is  terminated  pursuant to this
Section,  such termination  shall be without liability of any party to any other
party except as provided in Section 4 hereof, and provided further that Sections
1, 6, 7, 8 and 13 shall  survive such  termination  and remain in full force and
effect.

         Section 10. Default by One or More of the Underwriters.  If one or more
of the Underwriters shall fail at Closing Time or a Date of Delivery to purchase
the  Securities  which it or they are obligated to purchase under this Agreement
(the "Defaulted Securities"), the Representative shall have the right, within 24
hours  thereafter,  to make  arrangements for one or more of the  non-defaulting
Underwriters, or any other underwriters, to purchase all, but not less than all,
of the  Defaulted  Securities in such amounts as may be agreed upon and upon the
terms herein set forth; if, however, the Representative shall not have completed
such arrangements within such 24-hour period, then:

                  (a) if the number of Defaulted  Securities does not exceed 10%
         of the number of Securities  to be purchased on such date,  each of the
         non-defaulting  Underwriters  shall  be  obligated,  severally  and not
         jointly,  to purchase the full amount thereof in the  proportions  that
         their  respective  underwriting   obligations  hereunder  bear  to  the
         underwriting obligations of all non-defaulting Underwriters, or

                  (b) if the number of Defaulted  Securities  exceeds 10% of the
         number of Securities to be purchased on such date,  this  Agreement or,
         with  respect to any Date of Delivery  which  occurs  after the Closing
         Time, the obligation of the Underwriters to purchase and of the Company
         to sell the Option  Securities to be purchased and sold on such Date of
         Delivery  shall  terminate   without  liability  on  the  part  of  any
         non-defaulting Underwriter.

         No action taken  pursuant to this Section shall relieve any  defaulting
Underwriter from liability in respect of its default.

         In the event of any such default which does not result in a termination
of this  Agreement  or,  in the case of a Date of  Delivery  which is after  the
Closing Time,  which does not result in a termination  of the  obligation of the
Underwriters to purchase and the Company to sell the relevant Option Securities,
as the case may be,  either the  Representative  or the  Company  shall have the
right to postpone Closing Time or the relevant Date of Delivery, as the case may
be,  for a period  not  exceeding  seven  days in order to effect  any  required
changes in the Registration Statement or Prospectus or in any other documents or
arrangements.  As used  herein,  the  term  "Underwriter"  includes  any  person
substituted for an Underwriter under this Section 10.

         Section 11.  Notices.  All notices and other  communications  hereunder
shall be in  writing  and shall be  deemed to have been duly  given if mailed or
transmitted  by  any  standard  form  of   telecommunication.   Notices  to  the
Underwriters  shall be  directed to the  Representative  at North  Tower,  World
Financial Center, New York, New York 10281-1201, attention of Charles J. Murphy;
and notices to the Company  shall be  directed to it at 20 N.W.  Fourth  Street,
Evansville, Indiana 47741, attention of Jerry A. Benkert.

         Section 12. Parties.  This Agreement shall each inure to the benefit of
and be  binding  upon  each  of the  Underwriters  and  the  Company  and  their
respective  successors.  Nothing  expressed or  mentioned  in this  Agreement is
intended or shall be construed to give any person,  firm or  corporation,  other
than the Underwriters  and the Company and their  respective  successors and the
controlling  persons and officers and directors  referred to in Sections 6 and 7
and their heirs and legal representatives,  any legal or equitable right, remedy
or  claim  under  or in  respect  of  this  Agreement  or any  provision  herein
contained.  This Agreement and all conditions and provisions hereof are intended
to be for the sole and exclusive benefit of the Underwriters and the Company and
their  respective  successors,  and said  controlling  persons and  officers and
directors and their heirs and legal  representatives,  and for the benefit of no
other  person,  firm  or  corporation.  No  purchaser  of  Securities  from  any
Underwriter shall be deemed to be a successor by reason merely of such purchase.

         Section 13. GOVERNING LAW AND TIME. THIS AGREEMENT SHALL BE GOVERNED BY
AND  CONSTRUED IN ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW YORK.  SPECIFIED
TIMES OF DAY REFER TO NEW YORK CITY TIME.

         Section 14. Effect of Headings. The Article and Section headings herein
and the Table of  Contents  are for  convenience  only and shall not  affect the
construction hereof.







         If the  foregoing  is in  accordance  with  your  understanding  of our
agreement, please sign and return to the Company a counterpart hereof, whereupon
this instrument,  along with all  counterparts,  will become a binding agreement
between the Underwriters and the Company in accordance with its terms.

                                  Very truly yours,

                                  VECTREN CORPORATION



                                  By: /s/ Neil C. Ellerbrook
                                      ------------------------------------------
                                      Name:     Neil C. Ellerbrook
                                      Title:    Chairman and CEO


CONFIRMED AND ACCEPTED,
as of the date first above written:

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated

By: MERRILL LYNCH, PIERCE, FENNER & SMITH
                INCORPORATED


By       /s/ Charles Murphy
         ----------------------------------------
         Authorized Signatory


For itself and as Representative of the other  Underwriters  named in Schedule A
hereto.




                                   SCHEDULE A

                                                                   Number of
                         Name of Underwriter                  Initial Securities
                         -------------------                  ------------------

Merrill Lynch, Pierce, Fenner & Smith
            Incorporated...........................................      992,000
Credit Suisse First Boston Corporation.............................      992,000
A.G. Edwards & Sons, Inc.                                                992,000
Edward D. Jones & Co., L.P.                                              992,000
UBS Warburg LLC                                                          992,000
ABN AMRO Rothschild LLC                                                  120,000
Salomon Smith Barney Inc.                                                120,000
Robert W. Baird & Co. Incorporated                                        60,000
J.J.B. Hilliard, W. L. Lyons, Inc.                                        60,000
McDonald Investments Inc., A KeyCorp Company                              60,000
NatCity Investments, Inc.                                                 60,000
Raymond James & Associates, Inc.                                          60,000
                                                                   -------------
Total..............................................................    5,500,000
                                                                   =============







                                   SCHEDULE B
                               VECTREN CORPORATION

                            Significant Subsidiaries



Indiana Gas Company, Inc.
Southern Indiana Gas and Electric Company
Vectren Energy Delivery of Ohio, Inc.










                                   SCHEDULE C
                               VECTREN CORPORATION
                                 Common Stock
                            (No Par Value Per Share)

         1. The  initial  public  offering  price per share for the  Securities,
determined as provided in said Section 2, shall be $21.27.

         2. The purchase  price per share for the  Securities  to be paid by the
several  Underwriters  shall be  $20.53,  being an amount  equal to the  initial
public  offering  price set forth above less $0.74 per share;  provided that the
purchase price per share for any Option  Securities  purchased upon the exercise
of the  over-allotment  option  described in Section 2(b) shall be reduced by an
amount per share equal to any dividends or distributions declared by the Company
and payable on the Initial Securities but not payable on the Option Securities.



                                   SCHEDULE D
                          List of persons and entities
                               subject to lock-up


Niel C. Ellerbrook
Jerome A. Benkert
M. Susan Hardwick
Ronald E. Christian
John M. Dunn
John D. Englebrecht
Lawrence A. Ferger
Anton H. George
J. Gordon Hurst
Andrew E. Goebel
Robert L. Koch II
William G. Mays
J. Timothy McGinley
Donald A. Rausch
Richard P. Rechter
Ronald G. Reherman
James C. Shook
Richard W. Shymanski
James S. Vinson
Jean L. Wojtowicz






                                                                     Exhibit A-1

                      FORM OF OPINION OF COMPANY'S COUNSEL
                           TO BE DELIVERED PURSUANT TO
                                  SECTION 5(b)

         Based upon the foregoing and subject to the exceptions  hereinafter set
forth, we are of the opinion that:

                 (i) The  Company  has been  duly  incorporated  and is  validly
         existing as a corporation under the laws of the State of Indiana.

                (ii) The Company has corporate power and authority to own, lease
         and operate its  properties and to conduct its business as described in
         the Prospectus and to enter into and perform its obligations  under the
         Agreement.

               (iii) The Company is duly  qualified as a foreign  corporation to
         transact business and is in good standing in each jurisdiction in which
         such  qualification is required,  whether by reason of the ownership or
         leasing of  property  or the  conduct  of  business,  except  where the
         failure so to qualify or to be in good  standing  would not result in a
         Material Adverse Effect.

                (iv) The authorized, issued and outstanding capital stock of the
         Company  is as set  forth  in the  Prospectus  in the  column  entitled
         "Actual"  under the caption  "Capitalization"  (except  for  subsequent
         issuances,  if  any,  pursuant  to the  Agreement  or  pursuant  to the
         exercise  of  convertible  securities  or  options  referred  to in the
         Prospectus);  all of the issued and outstanding shares of capital stock
         of the Company  have been duly  authorized  and validly  issued and are
         fully paid and  non-assessable;  and none of the outstanding  shares of
         capital stock of the Company was issued in violation of the  preemptive
         or other similar rights of any securityholder of the Company.

                 (v) The Shares have been duly  authorized for issuance and sale
         to the  Underwriters  pursuant to the  Agreement  and,  when issued and
         delivered by the Company  pursuant to the Agreement  against payment of
         the  consideration  set forth in the Agreement,  will be validly issued
         and fully paid and  non-assessable;  no holder of the  Securities is or
         will be subject to personal liability by reason of being such a holder;
         and the  Shares  conform  to the  description  thereof  contain  in the
         Prospectus.

                (vi) The issuance of the Shares is not subject to  preemptive or
         other similar rights of any securityholder of the Company.

               (vii) The Rights Agreement has been duly authorized, executed and
         delivered by the Company and  constitutes  a valid and legally  binding
         agreement,  enforceable  against  the  Company in  accordance  with its
         terms,  subject,  as  to  enforceability,  to  bankruptcy,  insolvency,
         reorganization and other laws of general  applicability  relating to or
         affecting  creditors'  rights and to  general  equity  principles;  the
         Rights  under  the  Shareholder  Rights  Plan to which  holders  of the
         Securities  will be  entitled  have  been duly  authorized  and will be
         validly  issued;  and the  Rights  conform to the  description  thereof
         contained in the Prospectus.

              (viii) Each of the Subsidiaries of the Company (with the exception
         of Vectren Energy  Delivery of Ohio,  Inc.) has been duly  incorporated
         and  is  validly  existing  as a  corporation  under  the  laws  of the
         jurisdiction of its incorporation, has corporate power and authority to
         own,  lease and operate its  properties  and to conduct its business as
         described  in  the  Prospectus  and  is  duly  qualified  as a  foreign
         corporation  to  transact  business  and is in  good  standing  in each
         jurisdiction in which such qualification is required, whether by reason
         of the  ownership  or leasing of property  or the conduct of  business,
         except where the failure so to qualify or to be in good standing, where
         applicable,  would not result in a Material  Adverse Effect;  except as
         otherwise   disclosed  in  the  Prospectus,   all  of  the  issued  and
         outstanding  shares of capital stock of each  Subsidiary have been duly
         authorized and validly issued, are fully paid and  non-assessable  and,
         to the best of our  knowledge,  are owned by the  Company,  directly or
         through  subsidiaries,   free  and  clear  of  any  security  interest,
         mortgage,  pledge, lien, encumbrance,  claim or equity; and none of the
         outstanding  shares of capital  stock of any  Subsidiary  was issued in
         violation of the preemptive or similar rights of any  securityholder of
         such Subsidiary.

                (ix)  The  Agreement  has been  duly  authorized,  executed  and
         delivered by the Company.

                  (x) The  Registration  Statement,  including  any Rule  462(b)
         Registration Statement, has been declared effective under the 1933 Act;
         any required filing of the Prospectus  pursuant to Rule 424(b) has been
         made in the manner and within the time period  required by Rule 424(b);
         and,  to the  best of our  knowledge,  no  stop  order  suspending  the
         effectiveness of the  Registration  Statement has been issued under the
         1933 Act and no  proceedings  for that purpose have been  instituted or
         are pending or threatened by the Commission.

                 (xi) The  Registration  Statement,  including  any Rule  462(b)
         Registration  Statement,  the Rule  430A  Information  and the Rule 434
         Information,  as applicable,  the  Prospectus,  excluding the documents
         incorporated   by  reference   therein,   and  each  amendment  to  the
         Registration  Statement and amendment or supplement to the  Prospectus,
         as of their  respective  effective or issue dates (other than financial
         statements  and  related  schedules,  financial  data  and  statistical
         information  included  therein  or  omitted  therefrom,  as to which we
         express no opinion),  complied as to form in all material respects with
         the requirements of the 1933 Act and the 1933 Act Regulations.

                (xii) The documents  incorporated by reference in the Prospectus
         (other than the financial  statements and related schedules,  financial
         data and statistical information included therein or omitted therefrom,
         as to which we need express no opinion),  when they were filed with the
         Commission,  complied  as to form in all  material  respects  with  the
         requirements  of the  1934 Act and the  rules  and  regulations  of the
         Commission thereunder.

               (xiii) If Rule 434 has been relied upon,  the  Prospectus was not
         "materially  different,"  as such  term is used in Rule  434,  from the
         prospectus included in the Registration Statement at the time it became
         effective.

                (xiv)  The  form of  certificate  used to  evidence  the  Shares
         complies  in  all  material  respects  with  all  applicable  statutory
         requirements,  with any  applicable  requirements  of the  charter  and
         by-laws  of the  Company  and the  requirements  of the New York  Stock
         Exchange.

                 (xv)  To  the  best  of  our  knowledge,  except  as  otherwise
         disclosed in the  Registration  Statement and Prospectus,  there is not
         pending  or  threatened  any  action,  suit,  proceeding,   inquiry  or
         investigation, to which the Company or any subsidiary is a party, or to
         which the property of the Company or any subsidiary is subject,  before
         or brought by any court or  governmental  agency or body,  domestic  or
         foreign,  which may  reasonably  be  expected  to result in a  Material
         Adverse Effect, or which might reasonably be expected to materially and
         adversely affect the assets, properties or operations thereof, taken as
         a whole, or the  consummation of the  transactions  contemplated in the
         Agreement  or  the  performance  by  the  Company  of  its  obligations
         thereunder.

                (xvi) The  information in the Prospectus  under  "Description of
         Stock" and in the  Registration  Statement under Item 15, to the extent
         that it constitutes  matters of law,  summaries of legal  matters,  the
         Company's   charter  and  by-laws  or  legal   proceedings,   or  legal
         conclusions,  has been  reviewed  by us and is correct in all  material
         respects.

               (xvii) All  descriptions  in the  Registration  Statement and the
         Prospectus of contracts and other documents to which the Company or its
         subsidiaries are a party are accurate in all material respects.

              (xviii) To the best of our knowledge,  neither the Company nor any
         subsidiary  is in violation of its charter or by-laws.  Based solely on
         inquiries we have made of the Company's Executive Vice  President/Chief
         Financial  Officer,  Senior Vice  President/General  Counsel/Secretary,
         Vice  President/Treasurer  and  Vice  President/Controller,  and on the
         officer's  certificate attached hereto as Schedule B, no default by the
         Company or any subsidiary  exists in the due  performance or ----------
         observance  of  any  obligation,   agreement,   covenant  or  condition
         contained in any contract,  indenture,  mortgage, loan agreement, note,
         lease or other agreement or instrument that is described or referred to
         in  the   Registration   Statement  or  the   Prospectus  or  filed  or
         incorporated by reference as an exhibit to the Registration  Statement,
         except for defaults which would not have a Material Adverse Effect.

                (xix) The execution,  delivery and  performance of the Agreement
         and the consummation of the transactions  contemplated in the Agreement
         and in the Registration  Statement  (including the issuance and sale of
         the Shares and the use of the  proceeds  from the sale of the Shares as
         described in the  Prospectus  under the caption "Use Of Proceeds")  and
         compliance by the Company with its  obligations  under the Agreement do
         not and will not, whether with or without the giving of notice or lapse
         of time or both,  conflict with or constitute a breach of, or a default
         or Repayment  Event under,  or result in the creation or  imposition of
         any lien,  charge or  encumbrance  upon any  property  or assets of the
         Company  or  any  Subsidiary  pursuant  to,  any  contract,  indenture,
         mortgage,  deed of trust, loan or credit agreement,  note, lease or any
         other agreement or instrument, known to us, to which the Company or any
         Subsidiary is a party or by which it or any of them may be bound, or to
         which any of the property or assets of the Company or any Subsidiary is
         subject, nor will such action result in any violation of the provisions
         of the  charter  or by-laws of the  Company or any  Subsidiary,  or any
         applicable law, statute,  rule,  regulation,  judgment,  order, writ or
         decree, known to us, of any government,  government  instrumentality or
         court, domestic or foreign, having jurisdiction over the Company or any
         Subsidiary  or  any  of  their  respective   assets,   properties,   or
         operations.

                 (xx) The  Company is not an  "investment  company" or an entity
         "controlled"  by an "investment  company," as such terms are defined in
         the 1940 Act.

                (xxi) No  filing  with,  or  authorization,  approval,  consent,
         license, order, registration,  qualification or decree of, any court or
         governmental authority or agency, domestic or foreign (other than under
         the 1933 Act and the 1933 Act Regulations, which have been obtained, or
         as may be required under the securities or blue sky laws of the various
         states,  as to  which we need  express  no  opinion)  is  necessary  or
         required  in  connection  with  the due  authorization,  execution  and
         delivery of the Agreement or for the offering,  issuance or sale of the
         Shares.

               (xxii)  Further,  although  we are not  passing  upon  and do not
         assume any  responsibility  for, the accuracy and  completeness  of the
         statements  (except  as  covered  by  (v),  (vii),  (xvi)  and  (xvii))
         contained in the Registration Statement,  Prospectus,  or any amendment
         or supplement thereto, including the Rule 430A Information and Rule 434
         Information  (if  applicable),  we  advise  you,  on the  basis  of the
         discussions and inquiries concerning various legal and related subjects
         and reviews of and reports on certain corporate records,  documents and
         proceedings  and  conferences  with  representatives  of the Company at
         which certain portions of the Registration Statement and the Prospectus
         were discussed  (relying as to materiality to a certain extent upon the
         opinions and representations of the Company), no facts have come to our
         attention that would lead us to believe that the Registration Statement
         or any  amendment  thereto  (other than the  financial  statements  and
         related schedules,  financial data or statistical  information included
         in such  financial  statements  or  omitted  therefrom  as to  which we
         express no  opinion),  at the time such  Registration  Statement or any
         such amendment  became  effective,  contained an untrue  statement of a
         material fact or omitted to state a material fact required to be stated
         therein or necessary to make the  statements  therein not misleading or
         that the Prospectus or any amendment or supplement  thereto (other than
         the  financial  statements  and related  schedules,  financial  data or
         statistical  information  included  in  such  financial  statements  or
         omitted  therefrom as to which we express no opinion),  at the time the
         Prospectus was issued, at the time any such amendment or supplement was
         issued or at the date hereof,  included or includes an untrue statement
         of a  material  fact or  omitted  or  omits to  state a  material  fact
         necessary in order to make the statements  therein, in the light of the
         circumstances under which they were made, not misleading.

         In rendering such opinion,  such counsel may rely as to matters of fact
(but  not  as to  legal  conclusions),  to  the  extent  they  deem  proper,  on
certificates of responsible  officers of the Company and public officials.  Such
opinion shall not state that it is to be governed or qualified by, or that it is
otherwise subject to, any treatise, written policy or other document relating to
legal opinions,  including,  without limitation, the Legal Opinion Accord of the
ABA Section of Business Law (1991).






                                                                     Exhibit A-2

                  FORM OF OPINION OF COMPANY'S GENERAL COUNSEL
                           TO BE DELIVERED PURSUANT TO
                                  SECTION 5(b)

         Based upon the foregoing and subject to the exceptions  hereinafter set
forth, I am of the opinion that:

                  (i) To the  best of my  knowledge,  there  are no  franchises,
         contracts,  indentures,  mortgages,  loan agreements,  notes, leases or
         other  instruments  required  to be  described  or  referred  to in the
         Registration  Statement  or the  Prospectus  or to be filed as exhibits
         thereto  other than those  described or referred to therein or filed or
         incorporated  by reference as exhibits  thereto,  and the  descriptions
         thereof or references thereto are correct in all material respects.

                  (ii) To the best of my knowledge,  neither the Company nor any
         subsidiary  is in violation of its charter or by-laws and no default by
         the  Company  or any  subsidiary  exists  in  the  due  performance  or
         observance  of  any  obligation,   agreement,   covenant  or  condition
         contained in any contract,  indenture,  mortgage, loan agreement, note,
         lease or other agreement or instrument that is described or referred to
         in  the   Registration   Statement  or  the   Prospectus  or  filed  or
         incorporated by reference as an exhibit to the Registration  Statement,
         except for defaults which  individually  or in the aggregate  would not
         have a Material Adverse Effect.





         FORM OF LOCK-UP FROM DIRECTORS, OFFICERS OR OTHER STOCKHOLDERS
                            PURSUANT TO SECTION 5(i)

                                                                      Exhibit B

                                February o, 2001

MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
  as Representative of the several
  Underwriters to be named in the
  within-mentioned Purchase Agreement

c/o  Merrill Lynch & Co.
       Merrill Lynch, Pierce, Fenner & Smith
                   Incorporated
       North Tower
       World Financial Center
       New York, New York  10281-1209

         Re:      Proposed Public Offering by Vectren Corporation

Dear Sirs:

         The undersigned,  a [director]  [executive officer] [5% stockholder] of
Vectren  Corporation,  an Indiana corporation (the "Company"),  understands that
Merrill  Lynch  & Co.,  Merrill  Lynch,  Pierce,  Fenner  &  Smith  Incorporated
("Merrill  Lynch"),  as representative of the several  underwriters,  propose to
enter into a Purchase  Agreement  (the  "Purchase  Agreement")  with the Company
providing for the public offering of shares (the  "Securities") of the Company's
common stock, no par value per share (the "Common Stock"). In recognition of the
benefit that such an offering will confer upon the  undersigned  as a [director]
[executive  officer] [5%  stockholder]  of the  Company,  and for other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the undersigned agrees with each underwriter that, during a period
of 90 days from the date of the Purchase  Agreement,  the undersigned  will not,
without the prior written consent of Merrill Lynch, directly or indirectly,  (i)
offer,  pledge, sell, contract to sell, sell any option or contract to purchase,
purchase any option or contract to sell, grant any option,  right or warrant for
the sale of, or  otherwise  dispose of or transfer  any shares of the  Company's
Common Stock or any securities  convertible  into or exchangeable or exercisable
for Common Stock,  whether now owned or hereafter acquired by the undersigned or
with respect to which the  undersigned  has or  hereafter  acquires the power of
disposition,  or file any  registration  statement  under the  Securities Act of
1933,  as amended,  with respect to any of the  foregoing or (ii) enter into any
swap or any other  agreement or any transaction  that transfers,  in whole or in
part,  directly or  indirectly,  the  economic  consequence  of ownership of the
Common Stock,  whether any such swap or transaction is to be settled by delivery
of Common Stock or other securities, in cash or otherwise.






                              Very truly yours,

                              Signature:
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