UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-Q/A

                                 Amendment No. 1

[X]     QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934

For quarterly period ended March 31, 2001

                                       OR

[ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934

For the transition period from                       to
                                    -----------------  -----------------

Commission file number 1-6494

                            INDIANA GAS COMPANY, INC.
                           --------------------------
             (Exact name of registrant as specified in its charter)

         INDIANA                                               35-0793669
(State or other jurisdiction of                              (I.R.S Employer
incorporation or organization)                               Identification No.)

                20 N.W. Fourth Street, Evansville, Indiana 47741
              (Address of principal executive offices and Zip Code)

                                 (812) 491-4000
                                 --------------
              (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.

Yes [X]  No [ ]

Indicate the number of shares outstanding of each of the issuer's
classes of common stock, as of the latest practicable date.

Common Stock -Without par value        482.41561           May 10, 2001
- --------------------------------    ----------------       -------------------
      Class                         Number of shares           Date


2

                                TABLE OF CONTENTS


Item                                                                      Page
Number                                                                   Number
      1  Financial Statements (Unaudited)
         Indiana Gas Company, Inc.
           Condensed Balance Sheets                                        3-4
           Condensed Statements of Operations                               5
           Condensed Statements of Cash Flows                               6
         Notes to Condensed Unaudited Financial Statements                7-12
      2  Management's Discussion and Analysis of Results of Operations
         and Financial Condition                                         13-19
         Signatures                                                        20


3


ITEM 1.  FINANCIAL STATEMENTS (UNAUDITED)

                            INDIANA GAS COMPANY, INC.
                            CONDENSED BALANCE SHEETS
                             (Unaudited - Thousands)


                                                                                      March 31,
                                                                         -------------------------------------      December 31,
                                                                               2001                 2000                2000
                                                                         -----------------     ---------------    -----------------
                               ASSETS

                                                                                                             
Utility Plant:
     Original cost                                                           $  1,061,789         $ 1,019,811         $  1,056,945
     Less accumulated depreciation                                                443,246             415,781              434,845
                                                                         ----------------------------------------------------------
        Net utility plant                                                         618,543             604,030              622,100
                                                                         ----------------------------------------------------------

Current Assets:
     Cash and cash equivalents                                                      3,119               5,016                  300
     Accounts receivable, less reserves of $2,302, $2,553, and $2,063              68,334              40,615               81,225
     Accounts receivable from affiliated company                                        -               2,205               11,774
     Accrued unbilled revenues                                                     30,223              20,130               69,444
     Inventories                                                                        -               5,736               12,004
     Prepaid gas delivery service                                                   4,589                 114               34,849
     Recoverable natural gas costs                                                 55,479                   -               38,096
     Prepayments and other current assets                                           7,111              13,465               32,012
                                                                         ----------------------------------------------------------
        Total current assets                                                      168,855              87,281              279,704
                                                                         ----------------------------------------------------------
Investment in Unconsolidated Affiliate                                            223,688                   -              220,802

Other Assets:
     Regulatory assets                                                             23,187              12,199               18,578
     Other                                                                          2,584               4,214                2,488
                                                                         ----------------------------------------------------------
        Total other assets                                                         25,771              16,413               21,066
                                                                         ----------------------------------------------------------
TOTAL ASSETS                                                                 $  1,036,857          $  707,724         $  1,143,672
                                                                         ==========================================================


The accompanying notes are an integral part of these condensed financial
statements.

4
                            INDIANA GAS COMPANY, INC.
                            CONDENSED BALANCE SHEETS
                             (Unaudited - Thousands)


                                                                                 March 31,
                                                                         ------------------------      December 31,
                SHAREHOLDER'S EQUITY AND LIABILITIES                         2001          2000            2000
                                                                         ------------  -----------   --------------
                                                                                                  
Capitalization:
            Common stock and paid-in capital                                $ 142,995    $ 142,995         $142,995
            Retained earnings                                                  98,103      108,758           90,499
                                                                         ---------------------------------------------
              Total common shareholder's equity                               241,098      251,753          233,494
            Long-term debt, net of current maturities                         274,287      211,849          281,109
                                                                         ---------------------------------------------
               Total capitalization                                           515,385      463,602          514,603
                                                                         ---------------------------------------------
Commitments and Contingencies (Notes 8 and 11)

Current Liabilities:
            Notes payable to affiliated company                               184,700            -          218,200
            Notes payable                                                     153,034       50,203          134,724
            Interest payable to affiliated company                                910            -            2,340
            Accounts payable                                                   20,990       24,809          102,268
            Accounts payable to affiliated company                             17,072       14,226           18,329
            Refunds to customers and customer deposits                          6,981       23,675            3,953
            Accrued taxes                                                      14,256        7,834           25,054
            Accrued interest                                                    1,703          872            4,215
            Deferred income taxes                                               5,667            -            4,227
            Other current liabilities                                          11,923       12,943           14,504
                                                                         ---------------------------------------------
              Total current liabilities                                       417,236      134,562          527,814
                                                                         ---------------------------------------------
Deferred Credits and Other Liabilities:
            Deferred income taxes                                              51,131       55,006           54,807
            Accrued postretirement benefits other than pensions                30,848       29,080           29,938
            Unamortized investment tax credit                                  11,262        7,919            7,222
            Other                                                              10,995       17,555            9,288
                                                                         ---------------------------------------------
              Total deferred credits and other liabilities                    104,236      109,560          101,255
                                                                         ---------------------------------------------
TOTAL SHAREHOLDER'S EQUITY AND LIABILITIES                                 $1,036,857    $ 707,724      $ 1,143,672
                                                                         =============================================


              The accompanying notes are an integral part of these
                        condensed financial statements.

5

                            INDIANA GAS COMPANY, INC.
                       CONDENSED STATEMENTS OF OPERATIONS
                             (Unaudited - Thousands)


                                                                       Three Months                     Twelve Months
                                                                      Ended March 31,                  Ended March 31,
                                                              -------------------------------   -------------------------------
                                                                  2001             2000              2001            2000
                                                              --------------   --------------   ---------------  --------------

                                                                                                        
         OPERATING REVENUES                                      $  287,973       $  171,618        $  714,467      $  441,495
         COST OF GAS                                                215,166           98,893           506,747         241,717
                                                              -----------------------------------------------------------------
            Total margin                                             72,807           72,725           207,720         199,778
                                                              -----------------------------------------------------------------
         OPERATING EXPENSES:
            Operation and maintenance                                26,410           25,205           101,177          94,899
            Merger and integration costs                                503           13,448             3,737          13,448
            Depreciation and amortization                             9,796            9,018            37,438          35,162
            Income tax expense                                        6,533            6,599             7,185           8,979
            Taxes other than income taxes                             5,769            4,961            16,666          15,971
                                                              -----------------------------------------------------------------
              Total operating expenses                               49,011           59,231           166,203         168,459
                                                              -----------------------------------------------------------------
         OPERATING INCOME                                            23,796           13,494            41,517          31,319

         OTHER INCOME:
            Equity in earnings of unconsolidated affiliate            2,886                -             5,607              -
            Other - net                                              (1,291)             370            (2,034)          1,093
                                                              -----------------------------------------------------------------
              Total other income                                      1,595              370             3,573           1,093
                                                              -----------------------------------------------------------------
         INCOME BEFORE INTEREST                                      25,391           13,864            45,090          32,412

         INTEREST EXPENSE                                            10,264            5,033            27,585          17,837
                                                              -----------------------------------------------------------------

         NET INCOME                                               $  15,127        $   8,831         $  17,505       $  14,575
                                                              =================================================================



              The accompanying notes are an integral part of these
                         condensed financial statements

6
                            INDIANA GAS COMPANY, INC.
                       CONDENSED STATEMENTS OF CASH FLOWS
                             (Unaudited - Thousands)



                                                                          Three Months                    Twelve Months
                                                                         Ended March 31,                 Ended March 31,
                                                                   ----------------------------    ---------------------------
                                                                       2001           2000             2001            2000
                                                                   -------------  -------------    --------------  -----------
                                                                                                         
CASH FLOWS FROM (REQUIRED FOR) OPERATING ACTIVITIES
    Net income                                                       $ 15,127       $  8,831          $ 17,505       $ 14,575
    Adjustments to reconcile net income to cash provided
        from operating activities -
      Depreciation and amortization                                     9,796          9,018            37,438         35,162
      Deferred income taxes and investment tax credits                 (2,532)        (4,074)            10,897        (5,386)
      Allowance for funds used during construction                        (71)          (128)             (538)          (463)
      Undistributed earnings of unconsolidated affiliate               (2,886)             -            (5,607)             -
    Changes in assets and liabilities -
      Receivables - net                                                63,886         10,742           (35,607)         6,231
      Inventories                                                      12,004          6,706             5,736          1,178
      Prepaid gas delivery service                                     30,260         20,823            (4,475)          (114)
      Recoverable fuel and natural gas costs                          (17,383)             -           (55,479)             -
      Prepayments and other current assets                             24,901          3,003             6,354         (4,063)
      Regulatory assets                                                (4,609)         2,448           (10,988)         1,998
      Accounts payable, refunds to customers, customer
        deposits, other current liabilities                           (81,178)         17,272          (17,777)         6,330
      Accrued taxes and interest                                      (11,314)        (14,968)           1,491        (11,964)
      Accrued post-retirement benefits other than pensions                910             606            1,768          2,481
      Other - net                                                       3,398          (2,444)          (1,831)        (1,892)
                                                                   -----------------------------------------------------------
      Total adjustments                                                25,182          49,004          (68,618)        29,498
                                                                   -----------------------------------------------------------
        Net cash flows from (required for) operating activities        40,309          57,835          (51,113)        44,073
                                                                   -----------------------------------------------------------

CASH FLOWS (REQUIRED FOR) FROM FINANCING ACTIVITIES
      Proceeds from long-term debt                                          -              -            70,000         30,000
      Retirement of long-term debt and other obligations               (6,822)             -            (7,562)       (10,090)
      Net change in short-term borrowings                             (15,190)       (31,969)          287,531         30,224
      Dividends on common stock                                        (7,870)        (5,700)          (28,506)       (25,700)
      Other                                                              (544)             -               346              -
                                                                    ----------------------------------------------------------
        Net cash flows (required for) from financing activities       (30,426)       (37,669)           321,809        24,434
                                                                    ----------------------------------------------------------

CASH FLOWS (REQUIRED FOR) INVESTING ACTIVITIES
      Capital expenditures                                             (7,955)       (15,852)           (54,512)      (65,595)
      Investment in unconsolidated affiliate                                -              -                  -      (218,081)
      Other                                                               891            349                  -          (699)
                                                                    ----------------------------------------------------------
        Net cash flows (required for) investing activities             (7,064)       (15,503)          (272,593)      (66,294)
                                                                    ----------------------------------------------------------
Net increase (decrease) in cash                                         2,819          4,663             (1,897)        2,213

Cash and cash equivalents at beginning of period                          300            353              5,016         2,803
                                                                    ----------------------------------------------------------

Cash and cash equivalents at end of period                           $  3,119       $  5,016           $  3,119      $  5,016
                                                                     =========================================================


              The accompanying notes are an integral part of these
                        condensed financial statements.

7


                            INDIANA GAS COMPANY, INC.
                          NOTES TO FINANCIAL STATEMENTS
                                   (UNAUDITED)


1.       Organization and Nature of Operations

Indiana Gas Company, Inc. (Indiana Gas) operates as a separate wholly owned
subsidiary of Vectren Corporation (Vectren) and provides natural gas and
transportation services to a diversified base of customers in 311 communities in
49 of Indiana's 92 counties.

Vectren is an Indiana corporation that was organized on June 10, 1999, solely
for the purpose of effecting the merger of Indiana Energy, Inc. (Indiana Energy)
and SIGCORP, Inc. (SIGCORP). On March 31, 2000, the merger of Indiana Energy
with SIGCORP and into Vectren was consummated with a tax-free exchange of shares
and has been accounted for as a pooling-of-interests. The merger did not affect
Indiana Gas' debt securities.

Indiana Gas has a 47 % undivided interest in the Ohio operations acquired by
Vectren on October 31, 2000. The Ohio operations provide natural gas
distribution and transmission services to Dayton, Ohio and 16 counties in west
central Ohio. Indiana Gas' ownership is accounted for on the equity method in
accordance with Accounting Principles Board (APB) Opinion No. 18. Its ownership
interest is included in investment in unconsolidated affiliate in the Balance
Sheets, and its interest in the results of operations is included in other
income, net, as equity in earnings of unconsolidated affiliate in the Statements
of Income.

2.       Basis of Presentation

The interim condensed financial statements included in this report have been
prepared by Indiana Gas, without audit, as provided in the rules and regulations
of the Securities and Exchange Commission. Certain information and footnote
disclosures normally included in financial statements prepared in accordance
with accounting principles generally accepted in the United States have been
omitted as provided in such rules and regulations. Indiana Gas believes that the
information in this report reflects all adjustments necessary to fairly state
the results of the interim periods reported. These condensed financial
statements and related notes should be read in conjunction with Indiana Gas'
audited annual financial statements for the year ended December 31, 2000 filed
on Form 10-K. Because of the seasonal nature of Indiana Gas' operations, the
results shown on a quarterly basis are not necessarily indicative of annual
results.

The preparation of financial statements in conformity with accounting principles
generally accepted in the United States requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the statements
and the reported amounts of revenues and expenses during the reporting periods.
Actual results could differ from those estimates.

Certain reclassifications have been made to prior period financial statements to
conform with the current year classification. These reclassifications have no
impact on previously reported net income.
8


3.       Investment in Unconsolidated Affiliate

Unaudited summarized financial information as to assets and liabilities of the
Ohio operations as of March 31, 2001 and December 31, 2000 and its results of
operations for the three and twelve months ended March 31, 2001 are presented
below.

In thousands               At March 31, 2001           At December 31, 2000
- --------------------------------------------------------------------------------
Current assets                         $ 148,561                       $180,109
Non current assets                     $ 391,003                       $392,795
Current liabilities                    $ 312,837                       $344,675
Non current liabilities                $     969                       $  6,254

                           Three Months Ended           Twelve Months Ended
In thousands                 March 31, 2001               March 31, 2001
- --------------------------------------------------------------------------------
Revenues                               $ 182,967                       $294,323
Margin                                 $  35,519                       $ 63,711
Operating income                       $   7,927                       $ 14,742
Net income                             $   6,140                       $ 11,930

4.       Merger and Integration Costs

Merger and integration costs incurred for the three and twelve months ended
March 31, 2001 were $0.5 million and $3.7 million, respectively. Merger costs
are reflected in the financial statements of the subsidiaries in which merger
savings are expected to be realized. The continued merger integration activities
will be completed in 2001.

Since March 31, 2000, $17.3 million has been expensed associated with merger and
integration activities. Accruals were established at March 31, 2000 totaling
$11.9 million. Of this amount, $4.8 million related to employee and executive
severance, $5.0 million related to transaction costs and filing fees incurred
prior to the closing of the merger, and the remaining $2.1 million related to
employee relocations that occurred prior to or coincident with the merger
closing. At March 31, 2001, the accrual remaining for such costs totaled $1.0
million, all related to severance costs. Of the $17.3 million expensed, the
remaining $5.4 million was expensed through March 31, 2001 ($4.9 million in 2000
and $0.5 million in 2001) for accounting fees resulting from merger related
filing requirements, consulting fees related to integration activities such as
organization structure, employee travel between company locations as part of
integration activities, internal labor of employees assigned to integration
teams, and investor relations communications activities.

The integration activities experienced by the company included such things as
information system consolidation, process review and definition, organization
design and consolidation, and knowledge sharing.

As a result of merger integration activities, Vectren management has identified
certain information systems that are expected to be retired in 2001.
Accordingly, the useful lives of these assets have been shortened to reflect
this decision. These information system assets are owned by a wholly owned
subsidiary of Vectren, and the fees allocated by the subsidiary for the use of
these systems by Indiana Gas are reflected in operation and maintenance expenses
in the accompanying condensed financial statements. As a result of the shortened
useful lives, additional fees were incurred by Indiana Gas resulting in
additional operations and maintenance expense of approximately $3.2 million
($2.0 million after tax) and $14.6 million ($9.1 million after tax) for the
three and twelve months ended March 31, 2001.
9
5.       Inventories

Inventories consist principally of gas in underground storage valued using the
last in- first out (LIFO) method. During the three months ended March 31, 2001,
a LIFO liquidation occurred that will be replaced by December 31, 2001.
Accordingly, the liability created by the decrement of $1.6 million is included
in other current liabilities as of March 31, 2001.

6.       Short - Term Borrowings

At March 31, 2001, Indiana Gas was not in compliance with the total indebtedness
to capitalization ratio contained in its back up credit facility for its
commercial paper program. The non-compliance resulted from the indebtedness
incurred to purchase its ownership interest in the Ohio operations and working
capital requirements associated with higher gas costs. A waiver on the Indiana
Gas facility has been obtained to waive the non-compliance through and including
March 31, 2001 which effectively waives the noncompliance up to June 30, 2001,
the date of the next quarterly test of the financial covenants. Vectren
anticipates making an equity investment in Indiana Gas to bring Indiana Gas back
into compliance. No amount is outstanding under the back up facility.

7.       New Accounting Principle

In June 1998, the Financial Accounting Standards Board issued SFAS No. 133
"Accounting for Derivative Instruments and Hedging Activities" (SFAS 133), which
requires that every derivative instrument be recorded on the balance sheet as an
asset or liability measured at its market value and that changes in the
derivative's market value be recognized currently in earnings unless specific
hedge accounting criteria are met.

SFAS 133, as amended, is effective for fiscal years beginning after June 15,
2000 and must be applied to derivative instruments and certain derivative
instruments embedded in hybrid contracts that were issued, acquired or
substantively modified after December 31, 1998. Indiana Gas adopted SFAS 133 as
of January 1, 2001.

SFAS 133 requires that as of the date of initial adoption, the difference
between the market value of derivative instruments recorded on the balance sheet
and the previous carrying amount of those derivatives be reported in net income
or other comprehensive income, as appropriate, as the cumulative effect of a
change in accounting principle in accordance with APB 20, "Accounting Changes."

As of the date of adoption and through March 31, 2001, Indiana Gas was not
engaged in any derivative or hedging activity as defined by SFAS 133, as
amended; therefore, there was no impact at adoption or for the three and twelve
months ended March 31, 2001.

8.       Contingencies

Indiana Gas is party to various legal proceedings arising in the normal course
of business. In the opinion of management, with the exception of the litigation
matter related to ProLiance Energy Services, LLC (See Note 11), there are no
legal proceedings pending against Indiana Gas that are likely to have a material
adverse effect on its financial position or results of operations.
10

9.       Environmental Matters

In the past, Indiana Gas and others operated facilities for the manufacture of
gas. Given the availability of natural gas transported by pipelines, these
facilities have not been operated for many years. Under currently applicable
environmental laws and regulations, Indiana Gas, and others, may now be required
to take remedial action if certain byproducts are found above the regulatory
thresholds at these sites.

Indiana Gas has identified the existence, location and certain general
characteristics of 26 gas manufacturing and storage sites for which it may have
some remedial responsibility. Indiana Gas has completed a remedial
investigation/feasibility study (RI/FS) at one of the sites under an agreed
order between Indiana Gas and the Indiana Department of Environmental Management
(IDEM), and a Record of Decision was issued by the IDEM in January 2000.
Although Indiana Gas has not begun an RI/FS at additional sites, Indiana Gas has
submitted several of the sites to the IDEM's Voluntary Remediation Program and
is currently conducting some level of remedial activities including groundwater
monitoring at certain sites where deemed appropriate and will continue remedial
activities at the sites as appropriate and necessary.

In conjunction with data compiled by expert consultants, Indiana Gas has accrued
the estimated costs for further investigation, remediation, groundwater
monitoring and related costs for the sites. While the total costs that may be
incurred in connection with addressing these sites cannot be determined at this
time, Indiana Gas has accrued costs that it reasonably expects to incur totaling
approximately $20.3 million.

The estimated accrued costs are limited to Indiana Gas' proportionate share of
the remediation efforts. Indiana Gas has arrangements in place for 19 of the 26
sites with other potentially responsible parties, which serve to limit Indiana
Gas' share of response costs at these 19 sites to between 20 and 50 percent.

With respect to insurance coverage, as of March 31, 2001, Indiana Gas has
received and recorded settlements from all known insurance carriers in an
aggregate amount approximating its $20.3 million accrual.

Environmental matters related to manufactured gas plants have had no material
impact on earnings since costs recorded to date approximate PRP and insurance
settlement recoveries. While Indiana Gas has recorded all costs, which it
presently expects to incur in connection with activities at these sites, it is
possible that future events may require some level of additional remedial
activities which are not presently foreseen.

10.      Rate and Regulatory Matters

Commodity prices for natural gas purchases have increased significantly,
primarily due to a colder winter, increased demand and tighter supplies. Indiana
Gas is allowed full recovery of such changes in purchased gas costs for its
retail customers through commission-approved gas cost adjustment mechanisms.

10

On October 11, 2000, Indiana Gas filed for approval of its regular quarterly
GCA. In early December, the Indiana Utility Regulatory Commission (IURC) issued
an interim order approving the request by Indiana Gas for a GCA factor for
December 2000. On January 4, 2001, the IURC approved the January and February
2001 GCA as filed. The order also addressed the claim by the Indiana Office of
Utility Consumer Counselor (OUCC) that a portion of the requested GCA be
disallowed because Indiana Gas should have entered into additional commitments
for the winter's gas supply in late 1999 and early 2000. In procuring gas supply
for winter, Indiana Gas followed the gas procurement practices that it had
employed over the last several years. In response to the claim by the OUCC, the
IURC found that there should be a $3.8 million disallowance related to gas
procurement for the winter season. As a result, Indiana Gas recognized a pre-tax
charge of $3.8 million in December 2000. Both Indiana Gas and the OUCC appealed
the ruling. The Citizens Action Coalition of Indiana, Inc.(CAC), a not for
profit consumer advocate, also filed with the IURC a petition to intervene and a
notice of appeal of the order.

In March 2001, Indiana Gas reached agreement with the OUCC and CAC regarding the
IURC Order. As part of the agreement, among other things, Indiana Gas agreed to
contribute an additional $1.2 million to the state of Indiana's Low Income
Heating Assistance Program in 2001, and to credit $3.3 million of the $3.8
million disallowed amount to Indiana Gas customers' April 2001 utility bills in
exchange for both the OUCC and the CAC dropping their appeals of the IURC Order.
In April 2001, the IURC issued an order approving the settlement. The
contributions to Indiana's Low Income Heating Assistance Program totaling $1.2
million were made in 2001 and were charged to other-net in 2001.

11.      Affiliate Transactions

Vectren and certain subsidiaries of Vectren have provided certain corporate
general and administrative services to Indiana Gas including legal, finance,
tax, risk management and employee benefits. The costs have been allocated to
Indiana Gas using various allocators, primarily number of employees, number of
customers and/or revenues. Allocations are based on cost. Management believes
that the allocation methodology is reasonable and approximates the costs that
would have been incurred had Indiana Gas secured those services on a stand alone
basis. Indiana Gas received corporate allocations totaling $19.4 million and
$8.4 million for the three months ended March 31, 2001 and 2000, respectively.
For the twelve months ended March 31, 2001 and 2000, amounts billed were $44.3
million and $32.6, respectively.

Indiana Gas also participates in a centralized cash management program with its
parent, affiliated companies and banks which permits funding of checks as they
are presented.

ProLiance Energy, LLC. (ProLiance), a 50 % owned, non-regulated, energy
marketing affiliate of Vectren, provides natural gas supply and related services
to Indiana Gas. Purchases from ProLiance for resale and for injections into
storage for the three months ended March 31, 2001 and 2000 totaled $166.3
million and $66.1 million, respectively; and for the twelve months ended March
31, 2001 and 2000 totaled $501.7 million and $240.4 million, respectively.
Amounts charged by ProLiance are market based.

ProLiance began providing natural gas and related services to Indiana Gas,
Citizens Gas and Coke Utility (Citizens Gas) and others effective April 1, 1996.
The sale of gas and provision of other services to Indiana Gas by ProLiance is
subject to regulatory review through the quarterly gas cost adjustment (GCA)
process administered by the IURC.

11

On September 12, 1997, the IURC issued a decision finding the gas supply and
portfolio administration agreements between ProLiance and Indiana Gas and
ProLiance and Citizens Gas to be consistent with the public interest. The IURC's
decision reflected the significant gas cost savings to customers obtained
through ProLiance's services and suggested that all material provisions of the
agreements between ProLiance and the utilities are reasonable. Nevertheless,
with respect to the pricing of gas commodity purchased from ProLiance and two
other pricing terms, the IURC concluded that additional review in the GCA
process would be appropriate and directed that these matters be considered
further in the pending, consolidated GCA proceeding involving Indiana Gas and
Citizens Gas. Through a series of appeals, the order was finally considered by
the Indiana Supreme Court.

On September 22, 2000, the Indiana Supreme Court issued a decision affirming the
IURC's decision on ProLiance in all respects. The IURC has recently commenced
the processing of these further proceedings by conducting a prehearing
conference. Discovery is ongoing in the further proceeding at the current time.

In August 1998, Indiana Gas, Citizens Gas and ProLiance each received a Civil
Investigative Demand (CID) from the United States Department of Justice
requesting information relating to Indiana Gas' and Citizens Gas' relationship
with and the activities of ProLiance. The Department of Justice issued the CID
to gather information regarding ProLiance's formation and operations, and to
determine if trade or commerce has been restrained. Indiana Gas has provided all
information requested and management continues to believe that there are no
significant issues in this matter.

Indiana Gas continues to record gas costs in accordance with the terms of the
ProLiance contract.

CIGMA, LLC (CIGMA), owned jointly and equally by a wholly owned subsidiary of
Vectren and a third party, provides materials acquisition and related services
that are used by Indiana Gas. Purchases of these services for both the three
months ended March 31, 2001 and 2000 totaled $0.7 million, and for the twelve
months ended March 31 2001 and 2000 totaled $2.8 million and $3.0 million
respectively. Amounts charged by CIGMA, LLC are market based.

Amounts owed to wholly owned subsidiaries of Vectren totaled $202.7 million,
$14.2 million and $238.9 million at March 31, 2001, March 31, 2000 and December
31, 2000, respectively, and are included in payables to affiliated company in
the Balance Sheets. Amounts due from wholly owned subsidiaries of Vectren
totaled $2.2 million and $ 11.8 at March 31, 2000 and December 31, 2000,
respectively, and are included in accounts receivable from affiliated company in
the Balance Sheets.

Amounts owed to unconsolidated affiliates of Vectren totaled $40.0 million,
$39.0 million and $97.8 million at March 31, 2001, March 31, 2000 and December
31, 2000, respectively, and are included in accounts payable in the Balance
Sheets.

13

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND
         FINANCIAL CONDITION

                            INDIANA GAS COMPANY, INC.

                           Description of the Business

Indiana Gas Company, Inc. (Indiana Gas) operates as a separate wholly owned
subsidiary of Vectren Corporation (Vectren) and provides natural gas and
transportation services to a diversified base of customers in 311 communities in
49 of Indiana's 92 counties.

Vectren is an Indiana corporation that was organized on June 10, 1999, solely
for the purpose of effecting the merger of Indiana Energy, Inc. (Indiana Energy)
and SIGCORP, Inc. (SIGCORP). On March 31, 2000, the merger of Indiana Energy
with SIGCORP and into Vectren was consummated with a tax-free exchange of shares
and has been accounted for as a pooling of interests. The merger did not affect
Indiana Gas' debt securities.

Indiana Gas has a 47 % undivided interest in the Ohio operations acquired by
Vectren on October 31, 2000. The Ohio operations provide natural gas
distribution and transmission services to Dayton, Ohio and 16 counties in west
central Ohio. Indiana Gas' ownership is accounted for on the equity method in
accordance with Accounting Principles Board Opinion No. 18. Its ownership
interest is included in investment in unconsolidated affiliate in the Balance
Sheets, and its interest in the results of operations is included in other-net
as equity in earnings of unconsolidated affiliate in the Statements of Income.

                              Results of Operations

Net Income

For the three months ended March 31, 2001, net income was $15.1 million. Net
income before merger and integration costs of $3.7 million, including $3.2
million of additional operations and maintenance expense related to the
shortened useful lives of certain information systems to be retired in 2001 (see
merger and integration costs below), was $17.4 million, compared to net income
before merger and integration costs for the first quarter of 2000 of $18.2
million.

For the twelve months ended March 31, 2001, net income was $17.5 million. Net
income before merger and integration costs of $18.5 million, including $14.6
million of additional operations and maintenance expense related to the
shortened useful lives of certain information systems to be retired in 2001 (see
merger and integration costs below), was $29.9 million, compared to net income
before merger and integration costs for the twelve months ended March 31, 2000
of $24.0 million.

Utility Margin (Operating Revenues Less Cost of Gas)

Gas Utility Margin
Gas Utility margin for the three months ended March 31, 2001 of $72.8 million
was comparable to 2000. The favorable impact of a 7 % increase in throughput to
retail customers resulting from temperatures being 15 % colder than normal and a
2 % increase in retail customers were offset by reduced consumption and the cost
of unaccounted for gas due to much higher gas costs (see below).

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Total cost of gas sold was $215.2 million for the three months ended March 31,
2001 and $98.9 million in 2000. This increase of $116.3 million, or 118%, is
primarily due to significantly higher average per unit purchased gas costs. The
total average cost per dekatherm of gas purchased by Indiana Gas for the three
months ended March 31, 2001 was $7.54 compared to $3.84 for the same period in
2000.

Gas Utility margin for the twelve months ended March 31, 2001 of $207.7 million
increased $7.9 million, or 4 %, compared to 2000. The increase is due to a 9 %
increase in throughput resulting primarily from temperatures being 26 % colder
than the previous year and a 2 % increase in residential customer base. These
favorable impacts on gas margin were partially offset by a $3.8 million
disallowance of gas costs by the Indiana Utility Regulatory Commission (IURC)
and the cost of unaccounted for gas due to much higher gas costs.

Total cost of gas sold was $506.7 million for the twelve months ended March 31,
2001 and $241.7 million in 2000. This increase of $265.0 million, or 110 %, is
primarily due to significantly higher average per unit purchased gas costs.

Commodity prices for natural gas purchases have increased significantly,
primarily due to a colder winter, increased demand and tighter supplies. Indiana
Gas is allowed full recovery of such charges in purchased gas costs from its
retail customers through commission-approved gas cost adjustment mechanisms, and
margin on gas sales should not be impacted. However, in 2001 Indiana Gas has
experienced and may continue to experience higher working capital requirements,
increased expenses, including unrecoverable interest costs, uncollectibles and
unaccounted for gas, and some level of price sensitive reduction in volumes
sold. (See Note 10 of the Condensed Financial Statements.)

Operating Expenses

Operations and Maintenance
Operations and maintenance expenses increased $1.2 million, or 5 %, for the
three months ended March 31, 2001 compared to the prior year, and operations and
maintenance expenses increased $6.3 million, or 7 %, for the twelve months ended
March 31, 2001. The increases are primarily attributable to increased fees
allocated from a wholly owned subsidiary of Vectren to reflect the shortened
useful lives of certain information systems in use by Indiana Gas (see merger
and integration costs below).

Depreciation and Amortization
Depreciation and amortization increased $0.8 million and $2.3 million for the
three and twelve months ended March 31, 2001, respectively, compared to the
prior year due primarily to depreciation of additions to utility plant.

Income Tax Expense
Federal and state income taxes were comparable to the prior year for the three
months ended March 31, 2001 and decreased $1.8 million for the twelve months
ended March 31, 2001, compared to the prior year periods due primarily to a
normal effective tax rate in 2001, partially offset by higher pre-tax earnings.
The effective tax rate in 2000 was higher as a result of the non-deductibility
of certain merger and integration costs.

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Taxes Other Than Income Taxes
Taxes other than income taxes increased $0.8 million and $0.7 million for the
three and twelve month periods ended March 31, 2001, respectively, compared to
the prior year. The increases result from increases in gross receipts and
property taxes.

Merger and Integration Costs

Merger and integration costs incurred for the three and twelve months ended
March 31, 2001 were $0.5 million and $3.7 million, respectively and $13.4
million for both the three and twelve months ended March 31, 2000. Vectren
expects to realize net merger savings of nearly $200 million over the next ten
years from the elimination of duplicate corporate and administrative programs
and greater efficiencies in operations, business processes and purchasing. The
continued merger integration activities, which will contribute to the merger
savings, will be completed in 2001. Merger costs are reflected in the financial
statements of Vectren's operating subsidiaries in which merger savings are
expected to be realized.

Since March 31, 2000, $17.3 million has been expensed associated with merger and
integration activities. Accruals were established at March 31, 2000 totaling
$11.9 million. Of this amount, $4.8 million related to employee and executive
severance costs, $5.0 related to transaction costs and regulatory filing fees
incurred prior to the closing of the merger, and the remaining $2.1 million
related to employee relocations that occurred prior to or coincident with the
merger closing. At March 31, 2001, the accrual remaining for such costs totaled
$1.0 million, all related to severance costs. Of the $17.3 million expensed, the
remaining $5.4 million was expensed through March 31, 2001 ($4.9. million in
2000 and $0.5 in 2001) for accounting fees resulting from merger related filing
requirements, consulting fees related to integration activities such as
organization structure, employee travel between company locations as part of
integration activities, internal labor of employees assigned to integration
teams, investor relations communications activities, and certain benefit costs.

The integration activities experienced by the company included such things as
information system consolidation, process review and definition, organization
design and consolidation, and knowledge sharing.

As a result of merger integration activities, Vectren management has identified
certain information systems which are expected to be retired in 2001.
Accordingly, the useful lives of these assets have been shortened to reflect
this decision. These information system assets are owned by a wholly owned
subsidiary of Vectren and the fees allocated by the subsidiary for the use of
these systems by Indiana Gas are reflected in operation and maintenance expenses
in the accompanying financial statements. As a result of the shortened useful
lives, additional fees were incurred by Indiana Gas, resulting in an increase in
operation and maintenance expense of approximately $3.2 million and $14.6
million for the three and twelve months ended March 31, 2001.

In total, for the three months ended March 31, 2001, merger and integration
costs totaled $3.7 million ($2.3 million after tax), compared to $13.4 million
($9.4 million after tax) for the same period in 2000.

In total, for the twelve months ended March 31, 2001, merger and integration
costs totaled $18.5 million ($12.4 million after tax), compared to $13.4 million
($9.4 million after tax) for the same period in 2000.


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Other Income

Equity in Earnings of Unconsolidated Affiliate
Indiana Gas has a 47 % undivided interest in the Ohio operations acquired by
Vectren on October 31, 2000. Equity in earnings of unconsolidated affiliate
represents Indiana Gas' portion of the Ohio operations' net income.

Other-net
Other-net decreased $1.7 million and $3.1 million for the three and twelve month
periods ended March 31, 2001, compared to 2000. The decreases are due to
increased additional Low Income Heating Assistance Program contributions. (See
Note 10 of the Financial Statements).

Interest Expense

Interest expense increased by $5.2 million, or 104 %, and $9.7 million, 55%, for
the three and twelve months ended March 31, 2001, respectively, when compared to
the prior year. The increases were due primarily to interest related to the
financing of the acquisition of the Ohio operations, increased working capital
requirements resulting from extremely high natural gas prices, and higher
average interest rates on utility debt and short-term borrowings.

New Accounting Principle

See Note 7 of the Condensed Financial Statements regarding the adoption of SFAS
133, as amended.

                               Financial Condition

Environmental and Regulatory Matters

See Notes 9, 10, and 11 of the Financial Statements regarding matters affecting
operations including manufactured gas plants (Note 9), gas cost adjustment
proceedings (Note 10), and transactions with ProLiance Energy, LLC (Note 11).

Liquidity and Capital Resources

Indiana Gas' capitalization objective is 40-55 % permanent capitalization. This
objective may have varied, and will vary, from time to time, depending on
particular business opportunities and seasonal factors that affect the company's
operation. Indiana Gas' common equity component was 47 %, 54 % and 45 % of total
capitalization, including current maturities of long-term debt, at March 31,
2001, March 31, 2000 and December 31, 2000, respectively.

Short-term cash working capital is required primarily to finance customer
accounts receivable, unbilled utility revenues resulting from cycle billing, gas
in underground storage, prepaid gas delivery services, capital expenditures and
investments until permanently financed. Short-term borrowings tend to be
greatest during the summer when revenues are lowest and gas storage facilities
are being refilled. However, working capital requirements have been
significantly higher during the fourth quarter of 2000 and first quarter of 2001
due to the higher natural gas costs and the company's investment in the Ohio
operations initially financed with short term borrowings.

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Cash Flow from Operations
Cash flow from operations decreased during the three and twelve months ended
March 31, 2001 compared to 2000 by $17.5 million and $95.2 million,
respectively, due primarily to increased working capital requirements due to
higher gas costs, offset by additional net income.

Indiana Gas expects the majority of its capital expenditures and debt security
redemptions to be provided by internally generated funds.

Financing Activities
Cash flow required for financing activities of $30.4 million for the three
months ended March 31, 2001 includes $22.0 million of reductions in net
borrowings and $7.9 million common stock dividends paid to Vectren. This is a
decrease in cash required for financing activities when compared to the three
months ended March 31, 2000 of $7.2 million. The decrease is primarily due to
increased payments on short-term borrowings from internally generated funds in
the prior year.

Cash flow from financing activities of $321.8 million for the twelve months
ended March 31, 2001 includes $350.0 million of additional net borrowings offset
by $28.5 million of common stock dividends paid to Vectren. This is an increase
of $297.4 million over the same period in the prior year due primarily to
funding the investment in the Ohio operations and increased working capital
requirements.

At March 31, 2001, Indiana Gas has approximately $155 million of short-term
borrowing capacity with third parties for use in its operations, of which
approximately $2 million is available. On October 31, 2000, Indiana Gas'
investment in the Ohio operations of approximately $218 million was funded with
a combination of short-term borrowings from Vectren Utility Holdings, Inc. and
Indiana Gas' commercial paper program. These short-term borrowings will be
replaced over time with permanent financing.

At March 31, 2001, Indiana Gas was not in compliance with the total indebtedness
to capitalization ratio contained in its back up credit facility for its
commercial paper program. The non-compliance resulted from the indebtedness
incurred to purchase its ownership interest in the Ohio operations and working
capital requirements associated with higher gas costs. A waiver on the Indiana
Gas facility has been obtained to waive the non-compliance through and including
March 31, 2001 which effectively waives the noncompliance up to June 30, 2001,
the date of the next quarterly test of the financial covenants. Vectren
anticipates making an equity investment in Indiana Gas to bring Indiana Gas back
into compliance. No amount is outstanding under the back up facility.

Indiana Gas' credit rating on outstanding debt at March 31, 2001 was A/A2.
Indiana Gas' commercial paper retains an A-1/P-1 rating.

Capital Expenditures and Other Investment Activities
Cash required for investing activities of $7.1 million for the three months
ended March 31, 2001 includes $8.0 million of capital expenditures. Investing
activities for the three months ended March 31, 2000 were $15.5 million.

Cash required for investing activities of $272.6 million for the twelve months
ended March 31, 2001 includes $218.1 million required for the Ohio operations
acquisition, and $54.5 million of capital expenditures. This is an increase of
$206.3 million over the same period in the prior year due primarily to the
investment in the Ohio operations.

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New construction, normal system maintenance and improvements, and technology
investments needed to provide service to a growing customer base will continue
to require substantial expenditures. Capital expenditures for the remainder of
2001 are estimated at $40 million.

                           Forward-Looking Information

A "safe harbor" for forward-looking statements is provided by the Private
Securities Litigation Reform Act of 1995 (Reform Act of 1995). The Reform Act of
1995 was adopted to encourage such forward-looking statements without the threat
of litigation, provided those statements are identified as forward-looking and
are accompanied by meaningful cautionary statements identifying important
factors that could cause the actual results to differ materially from those
projected in the statement. Certain matters described in Management's Discussion
and Analysis of Results of Operations and Financial Condition, including, but
not limited to Vectren's realization of net merger savings and ProLiance, are
forward-looking statements. Such statements are based on management's beliefs,
as well as assumptions made by and information currently available to
management. When used in this filing, the words "believe," "anticipate,"
"endeavor," "estimate," "expect," "objective," "projection," "forecast," "goal,"
and similar expressions are intended to identify forward-looking statements. In
addition to any assumptions and other factors referred to specifically in
connection with such forward-looking statements, factors that could cause
Vectren and its subsidiaries' actual results to differ materially from those
contemplated in any forward-looking statements included, among others, the
following:

 |X|    Factors   affecting   utility   operations  such  as  unusual  weather
        conditions; catastrophic weather-related damage; unusual maintenance or
        repairs; unanticipated changes to gas supply costs, or availability due
        to higher demand, shortages,  transportation  problems  or other
        developments;  environmental  or pipeline incidents;  transmission or
        distribution incidents; or availability due to  demand,  shortages,
        transmission  problems  or other  developments;  or gas pipeline system
        constraints.

|X|     Increased competition in the energy environment including effects of
        industry restructuring and unbundling.

|X|     Regulatory factors such as unanticipated changes in rate-setting
        policies or procedures, recovery of investments and costs made under
        traditional regulation, and the frequency and timing of rate increases.

|X|     Financial or regulatory accounting principles or policies imposed by
        the Financial Accounting Standards Board, the Securities and Exchange
        Commission, the Federal Energy Regulatory Commission, state public
        utility commissions, state entities which regulate natural gas
        transmission, gathering and processing, and similar entities with
        regulatory oversight.

|X|     Economic conditions including inflation rates and monetary fluctuations.

|X|     Changing market conditions and a variety of other factors associated
        with physical energy and financial trading activities including, but
        not limited to, price, basis, credit, liquidity, volatility, capacity,
        interest rate, and warranty risks.


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|X|     Availability or cost of capital, resulting from changes in Vectren
        Corporation and its subsidiaries, interest rates, and securities
        ratings or market perceptions of the utility industry and
        energy-related industries.

|X|     Employee workforce factors including changes in key executives,
        collective bargaining agreements with union employees, or work
        stoppages.

|X|     Legal and regulatory delays and other obstacles associated with mergers,
        acquisitions, and investments in joint ventures.

|X|     Costs and other effects of legal and administrative proceedings,
        settlements, investigations, claims, and other matters, including, but
        not limited to, those described in Management's Discussion and Analysis
        of Results of Operations and Financial Condition.

|X|     Changes in federal, state or local legislature requirements, such as
        changes in tax laws or rates, environmental laws and regulations.

Indiana Gas undertakes no obligation to publicly update or revise any
forward-looking statements, whether as a result of changes in actual results,
changes in assumptions, or other factors affecting such statements.

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                                   SIGNATURES

Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                            INDIANA GAS COMPANY, INC.
                                   Registrant




        August 27, 2001                         /s/Jerome A. Benkert, Jr.
                                                -------------------------
                                                Jerome A. Benkert, Jr.
                                                Executive Vice President and
                                                Chief Financial Officer


                                                /s/M. Susan Hardwick
                                                M. Susan Hardwick
                                                Vice President and Controller