NISOURCE INC/DE
S-3/A, 2000-11-17
ELECTRIC & OTHER SERVICES COMBINED
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<PAGE>   1


   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 17, 2000


                                                      REGISTRATION NO. 333-49330

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ---------------------

                                AMENDMENT NO. 1


                                       TO


                                    FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                             ---------------------


<TABLE>
<S>                                                    <C>
                NISOURCE FINANCE CORP.                                     NISOURCE INC.
             (Exact name of registrant as                           (Exact name of registrant as
              specified in its charter)                              specified in its charter)

                       INDIANA                                                DELAWARE
             (State or other jurisdiction                           (State or other jurisdiction
          of incorporation or organization)                      of incorporation or organization)

                      35-2105468                                             35-2108964
       (I.R.S. Employer Identification Number)                (I.R.S. Employer Identification Number)
</TABLE>


                             ---------------------


<TABLE>
<S>                                                    <C>
                                                                       FRANCIS P. GIROT, JR.
                                                                           NISOURCE INC.
                 801 EAST 86TH AVENUE                                   801 EAST 86TH AVENUE
             MERRILLVILLE, INDIANA 46410                            MERRILLVILLE, INDIANA 46410
                    (219) 853-5200                                         (219) 853-5200
  (Address, including zip code and telephone number,      (Name, address, including zip code and telephone
    including area code, of registrant's principal                            number,
                   executive office)                         including area code, of agent for service)
</TABLE>


                             ---------------------
                                    Copy to:


                                ROBERT J. MINKUS


                                 DAVID MCCARTHY

                             SCHIFF HARDIN & WAITE
                                6600 SEARS TOWER
                            CHICAGO, ILLINOIS 60606
                                 (312) 258-5500
                             ---------------------
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  From time
to time after the effective date of this registration statement as determined by
market and other conditions.

     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, check the following box.  [
]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box.  [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
check the following box.  [ ]

     THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING
PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>   2

      The information in this Prospectus is not complete and may be changed. We
      may not sell these securities until the Registration Statement filed with
      the Securities and Exchange Commission is effective. This Prospectus is
      not an offer to sell these securities, and it is not soliciting an offer
      to buy these securities in any state where the offer or sale is not
      permitted.


                 SUBJECT TO COMPLETION, DATED NOVEMBER 17, 2000


PROSPECTUS


                                 $2,500,000,000


                                [NISOURCE LOGO]

                                 NISOURCE INC.

                                  Common Stock
                                Preferred Stock
                         Guarantees of Debt Securities

                             NISOURCE FINANCE CORP.

                                Debt Securities
          Guaranteed as Set Forth in This Prospectus by NiSource Inc.

                               ------------------

     NiSource Inc. may offer, from time to time, in amounts, at prices and on
terms that it will determine at the time of offering, any or all of the
following:

     - shares of common stock, including preferred stock purchase rights;

     - shares of preferred stock, in one or more series.

     NiSource Finance Corp., a wholly owned subsidiary of NiSource, may offer
from time to time in amounts, at prices and on terms to be determined at the
time of the offering, one or more series of its debt securities. NiSource will
fully and unconditionally guarantee the obligations of NiSource Finance under
any debt securities issued under this prospectus or any prospectus supplement.

     We will provide specific terms of these securities, including their
offering prices, in prospectus supplements to this prospectus. The prospectus
supplements may also add, update or change information contained in this
prospectus. You should read this prospectus and any prospectus supplement
carefully before you invest.


     We may offer these securities to or through underwriters, through dealers
or agents, directly to you or through a combination of these methods. You can
find additional information about our plan of distribution for the securities
under the heading "Plan of Distribution" beginning on page 19 of this
prospectus. We will also describe the plan of distribution for any particular
offering of these securities in the applicable prospectus supplement. This
prospectus may not be used to sell our securities unless it is accompanied by a
prospectus supplement.


                               ------------------

NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.


               The date of this prospectus is November   , 2000.

<PAGE>   3

                               TABLE OF CONTENTS


<TABLE>
<S>                                     <C>
ABOUT THIS PROSPECTUS.................    1
WHERE YOU CAN FIND MORE INFORMATION...    1
FORWARD-LOOKING STATEMENTS............    3
NISOURCE INC. ........................    4
NISOURCE FINANCE CORP.................    6
USE OF PROCEEDS.......................    6
RATIOS OF EARNINGS TO FIXED CHARGES...    6
DESCRIPTION OF CAPITAL STOCK..........    7
DESCRIPTION OF THE DEBT SECURITIES....    9
PLAN OF DISTRIBUTION..................   19
LEGAL OPINIONS........................   20
EXPERTS...............................   21
</TABLE>


                                        i
<PAGE>   4

                             ABOUT THIS PROSPECTUS

     This prospectus is part of a registration statement that we have filed with
the Securities and Exchange Commission, or SEC, utilizing a "shelf" registration
or continuous offering process. Under this process, NiSource may offer shares of
its common stock or preferred stock, and NiSource Finance may offer various
series of its debt securities guaranteed by NiSource, from time to time using
this prospectus and related prospectus supplements. These securities may be
offered up to a total amount of $2.5 billion.

     This prospectus provides you with a general description of the common
stock, preferred stock, debt securities and guarantees we may offer. Each time
we offer securities, we will provide a prospectus supplement that will contain
specific information about the terms of that offering. That prospectus
supplement may include a description of any risk factors or other special
considerations applicable to those securities. The prospectus supplement may
also add, update or change information contained in this prospectus. If there is
any inconsistency between the information in the prospectus and the prospectus
supplement, you should rely on the information in the prospectus supplement. You
should read both this prospectus and the applicable prospectus supplement
together with the additional information described under the heading "Where You
Can Find More Information."

     The registration statement containing this prospectus, including the
exhibits to the registration statement, provides additional information about us
and the securities offered under this prospectus. The registration statement,
including the exhibits, can be read at the SEC website or at the SEC offices
mentioned under the heading "Where You Can Find More Information."

     You should rely only on the information incorporated by reference or
provided in this prospectus and the accompanying prospectus supplement. We have
not authorized anyone to provide you with different information. We are not
making an offer to sell or soliciting an offer to buy these securities in any
jurisdiction in which the offer or solicitation is not authorized or in which
the person making the offer or solicitation is not qualified to do so or to
anyone to whom it is unlawful to make the offer or solicitation. You should not
assume that the information in this prospectus or the accompanying prospectus
supplement is accurate as of any date other than the date on the front of the
document.

     References to "NiSource" refer to NiSource Inc. and references to "NiSource
Finance" refer to NiSource Finance Corp. Unless the context requires otherwise,
references to "we," "us" or "our" refer collectively to NiSource and its
subsidiaries, including NiSource Finance. References to "securities" refer
collectively to the common stock, preferred stock, debt securities and
guarantees of debt securities registered hereunder.

                      WHERE YOU CAN FIND MORE INFORMATION

     NiSource files annual, quarterly and current reports, proxy statements and
other information with the SEC. You may read and copy any document NiSource
files at the SEC's public reference rooms at 450 Fifth Street, N.W., Room 1024,
Washington, D.C. 20549, Seven World Trade Center, Suite 1300, New York, New York
10048, and Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. You may obtain additional information about the public reference
rooms by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a
site on the Internet (http://www.sec.gov) that contains reports, proxy
statements and other information regarding issuers that file electronically with
the SEC, including NiSource.

     You may also read reports, proxy statements and other documents relating to
NiSource at the offices of the New York Stock Exchange at 20 Broad Street, New
York, New York 10005.

     The SEC allows us to "incorporate by reference" information into this
prospectus. This means that we can disclose important information to you by
referring you to another document that NiSource, or one of its corporate
predecessors, NiSource Inc. (incorporated in Indiana) and Columbia Energy Group,
has filed separately with the SEC. The information incorporated by reference is
considered to be part of this prospectus. Information that NiSource files with
the SEC after the date of this prospectus will

                                        1
<PAGE>   5


automatically modify and supersede the information included or incorporated by
reference in this prospectus to the extent that the subsequently filed
information modifies or supersedes the existing information. We incorporate by
reference our Current Reports on Form 8-K dated November 1, 2000, November 3,
2000, November 6, 2000 (as amended November 7, 2000) and November 7, 2000 and
any future filings we make with the SEC under sections 13(a), 13(c), 14 or 15(d)
of the Securities Exchange Act of 1934 until we sell all of the securities. We
also incorporate by reference the following documents filed with the SEC by our
corporate predecessor NiSource Inc. (incorporated in Indiana) (SEC File Number
1-9779):


     - NiSource's Annual Report on Form 10-K for the fiscal year ended December
       31, 1999;

     - NiSource's Quarterly Reports on Form 10-Q for the fiscal quarters ended
       March 31, 2000, June 30, 2000 and September 30, 2000;

     - NiSource's Current Reports on Form 8-K dated February 14, 2000, February
       24, 2000, March 3, 2000, April 3, 2000, April 25, 2000, June 13, 2000,
       September 1, 2000, September 13, 2000 and October 31, 2000; and

     - NiSource's definitive joint proxy statement/prospectus dated April 24,
       2000.

     We also incorporate by reference the following documents filed with the SEC
by our corporate predecessor Columbia Energy Group (SEC File Number 1-1098):

     - Columbia's Annual Report on Form 10-K for the fiscal year ended December
       31, 1999;

     - Columbia's Quarterly Reports on Form 10-Q for the fiscal quarters ended
       March 31, 2000, June 30, 2000 and September 30, 2000; and

     - Columbia's Current Reports on Form 8-K dated January 27, 2000, April 13,
       2000, May 3, 2000, May 12, 2000, May 22, 2000, June 2, 2000, June 15,
       2000, July 14, 2000, October 2, 2000, October 12, 2000, October 16, 2000
       and November 1, 2000.

     You may request a copy of any of these filings at no cost by writing to or
telephoning us at the following address and telephone number: Gary W. Pottorff,
NiSource Inc., 801 East 86th Avenue, Merrillville, Indiana 46410, telephone:
(219) 853-5200.

     NiSource maintains an Internet site at http://www.nisource.com which
contains information concerning NiSource and its subsidiaries. The information
contained at NiSource's Internet site is not incorporated by reference in this
prospectus, and you should not consider it a part of this prospectus.

     We have filed this prospectus with the SEC as part of a registration
statement on Form S-3 under the Securities Act of 1933. This prospectus does not
contain all of the information included in the registration statement. Any
statement made in this prospectus concerning the contents of any contract,
agreement or other document is only a summary of the actual document. If we have
filed any contract, agreement or other document as an exhibit to the
registration statement, you should read the exhibit for a more complete
understanding of the document or matter involved. Each statement regarding a
contract, agreement or other document is qualified in its entirety by reference
to the actual document.

                                        2
<PAGE>   6

                           FORWARD-LOOKING STATEMENTS

     Some of the information included in this prospectus, in any prospectus
supplement and in the documents incorporated by reference are forward-looking
statements within the meaning of the securities laws. These statements concern
our plans, expectations and objectives for future operations. Any statement that
is not a historical fact is a forward-looking statement. We use the words
"estimate," "intend," "expect," "believe," "anticipate" and similar expressions
to identify forward-looking statements, but some of these statements may use
other phrasing. NiSource undertakes no obligation to release any revisions to
these forward-looking statements publicly to reflect events or circumstances
after the date of this prospectus or accompanying prospectus supplement or to
reflect the occurrence of unanticipated events. While we make the
forward-looking statements in good faith and believe they are based on
reasonable assumptions, these statements are subject to risks and uncertainties.
Important factors that could cause actual results to differ materially from
those suggested by the forward-looking statements include:

     - the weather;

     - the federal and state regulatory environment, including changes in
       environmental and other laws and regulations to which we are subject;

     - the economic climate;

     - growth in our service territories;

     - customers' usage patterns and preferences;

     - the degree to which and the speed with which competition changes the
       utility industry;

     - fluctuation in supply and demand for energy commodities and the timing
       and extent of changes in commodity prices;

     - changing conditions in the capital and equity markets;

     - whether, and the extent to which, we achieve efficiencies and cost
       savings from the integration of the former NiSource and Columbia Energy
       Group businesses; and

     - other uncertainties, all of which are difficult to predict, and many of
       which are beyond our control, including factors we discuss in this
       prospectus and any prospectus supplement and our filings with the SEC.

     Accordingly, you should not rely on the accuracy of predictions contained
in forward-looking statements. These statements speak only as of the date of
this prospectus, the date of the accompanying prospectus supplement or, in the
case of documents incorporated by reference, the date of those documents.

                                        3
<PAGE>   7

                                 NISOURCE INC.

     Overview.  NiSource is a super-regional energy holding company that
provides natural gas, electricity and other products and services to 3.6 million
customers located within the energy corridor that runs from the Gulf Coast
through the Midwest to New England. On November 1, 2000, NiSource completed its
acquisition of Columbia Energy Group for an aggregate consideration of
approximately $6 billion, with 30% of the consideration paid in common stock and
70% of the consideration paid in cash and SAILS(SM) (units each consisting of a
zero coupon debt security coupled with a forward equity contract). NiSource also
assumed approximately $2 billion in Columbia debt.

     As a result of the acquisition, NiSource is the largest natural gas
distribution company, as measured by number of customers, operating east of the
Rockies. NiSource's principal subsidiaries include the Columbia Energy Group, a
vertically-integrated natural gas distribution, transmission, storage and
exploration and production holding company whose subsidiaries provide service to
customers in the Midwest, the Mid-Atlantic and the Northeast; Northern Indiana
Public Service Company, a vertically-integrated gas and electric company
providing service to customers in northern Indiana; and Bay State Gas Company, a
natural gas distribution company serving customers in New England. NiSource's
business lines include:

     - natural gas distribution;

     - natural gas transmission and storage;

     - electric operations;

     - exploration and production; and

     - other products and services.


<TABLE>
<CAPTION>
                                  GAS
                              TRANSMISSION               ELECTRIC             EXPLORATION AND           OTHER PRODUCTS
GAS DISTRIBUTION              AND STORAGE               OPERATIONS               PRODUCTION              AND SERVICES
----------------              ------------              ----------            ---------------           --------------
<S>                      <C>                      <C>                      <C>                      <C>
- 3.2 million            - Over 16,500 miles of   - 426,000 customers in   - Based in Appalachia    - Primary Energy
  customers in nine        pipeline in 16           northern Indiana         and Canada               (cogeneration)
  states                   states and D.C.        - 3,179 MW of coal-      - Proved gas reserves    - Energy USA-TPC
- 51,700 miles of        - One of the largest       fired and 203MW of       of 966 Bcfe              (energy marketing)
  distribution             underground natural      gas-fired generation   - Owns and operates      - Telecommunications
  pipelines                gas storage networks   - Interconnected with      8,188 wells              (260 miles of dark
- Unbundling programs      (670 Bcf)                five neighboring       - 6,069 miles of           fiber)
  initiated in most                                 utilities                gathering facilities
  states
</TABLE>


     Strategy.  NiSource is focused on becoming the premier energy company
serving customers throughout the energy-intensive corridor that extends from the
supply areas in the Gulf Coast through the consumption centers in the Midwest,
Mid-Atlantic and Northeast. This corridor is home to 30% of the nation's
population and 40% of its energy consumption. NiSource believes natural gas will
be the fuel of choice to meet the corridor's growing energy needs. The merger
with Columbia furthers this strategy by combining NiSource's natural gas
distribution assets in Indiana and New England with Columbia's natural gas
distribution, storage and exploration and production assets in Ohio, the
Mid-Atlantic and Appalachia and Columbia's interstate transmission assets.

     Gas Distribution.  NiSource has the nation's second largest volume of gas
sales, on average over 2.3 billion cubic feet per day. Through its wholly-owned
subsidiary, Columbia Energy Group, NiSource owns five distribution subsidiaries
that provide natural gas under the Columbia Gas name to nearly 2.1 million
residential, commercial and industrial customers in Ohio, Pennsylvania,
Virginia, Kentucky and Maryland. NiSource also distributes natural gas to
approximately 751,000 customers in northern Indiana through three subsidiaries:
Northern Indiana Public Service Company, Kokomo Gas and Fuel Company and
Northern Indiana Fuel and Light Company, Inc. Additionally, NiSource's
subsidiaries, Bay State Gas Company and Northern Utilities, Inc., distribute
natural gas to more than 320,000 customers in the areas

                                        4
<PAGE>   8

of Brockton, Lawrence and Springfield, Massachusetts, Lewiston and Portland,
Maine, and Portsmouth, New Hampshire.

     Gas Transmission and Storage.  NiSource's subsidiaries, Columbia Gas
Transmission Corporation and Columbia Gulf Transmission Company, own and operate
an interstate pipeline network of approximately 16,250 miles extending from
offshore in the Gulf of Mexico to Lake Erie, New York and the eastern seaboard.
Together, Columbia Gas Transmission and Columbia Gulf serve customers in 15
northeastern, mid-Atlantic, midwestern and southern states and the District of
Columbia. In addition, Columbia Gas Transmission operates one of the nation's
largest underground natural gas storage systems capable of storing approximately
670 billion cubic feet of natural gas.


     Columbia Gas Transmission is also participating in the proposed 442-mile
Millennium Pipeline Project that has been submitted to the Federal Energy
Regulatory Commission for approval. As proposed, the project will have the
capacity to transport approximately 700 billion cubic feet of natural gas per
day from the Lake Erie region to eastern markets.


     NiSource's wholly-owned subsidiaries own and operate interstate pipelines
connecting northwest Indiana and Ohio as well as Massachusetts and Maine. In
addition, NiSource owns a 19% interest in a pipeline linking production areas in
New Brunswick, Canada to Maine, New Hampshire and Massachusetts.

     Electric Operations.  NiSource generates and distributes electricity to the
public through its subsidiary Northern Indiana Public Service Company. Northern
Indiana provides electric service to approximately 426,000 customers in 30
counties in the northern part of Indiana. Northern Indiana owns and operates
four coal-fired electric generating stations with a net capability of 3,179
megawatts, four gas fired combustion turbine generating units with a net
capability of 203 megawatts and two hydroelectric generating plants with a net
capability of 10 megawatts, for a total system net capability of 3,392
megawatts. Northern Indiana is interconnected with five neighboring electric
utilities. During the year ended December 31, 1999, Northern Indiana generated
89.9% and purchased 10.1% of its electric requirements.

     Exploration and Production.  NiSource also owns Columbia Energy Resources,
Inc., an exploration and production subsidiary that explores for, develops,
gathers and produces natural gas and oil in Appalachia and Canada. As of
December 31, 1999, Columbia Energy Resources held interests in approximately 3.9
million net acres of gas and oil leases and had proved gas reserves of nearly
966 billion cubic feet of natural gas equivalent. Columbia Energy Resources owns
and operates 8,188 wells as well as 6,069 miles of gathering facilities.

     Other Products and Services.  NiSource develops unregulated power projects
through its subsidiary, Primary Energy, Inc. Primary Energy works with
industrial customers in managing the engineering, construction, operation and
maintenance of "inside the fence" cogeneration plants that provide cost-
effective, long-term sources of energy for energy-intensive facilities.

     NiSource provides non-regulated energy services through its wholly-owned
subsidiary Energy USA, Inc. Energy USA and its subsidiaries provide to customers
in 22 states a variety of energy-related services, including gas marketing and
asset management services and underground utility locating and marking services.
NiSource expanded its gas marketing and trading operations with the April 1999
acquisition of TPC Corporation, now renamed Energy USA-TPC Corp., a natural gas
asset management company. In addition, NiSource has invested in a number of
distributed generation technologies including fuel cells and microturbine
ventures.

     NiSource is completing a fiber optics network for voice and data
communication along its pipeline rights-of-way between New York and Washington
D.C.

     Through its wholly-owned subsidiary, IWC Resources Corporation and its
subsidiaries, NiSource supplies water to residential, commercial and industrial
customers and for fire protection service in Indianapolis, Indiana and
surrounding areas.

                                        5
<PAGE>   9


     Non-Core Divestitures.  In connection with the Columbia merger, NiSource
has sold or is divesting certain businesses judged to be non-core to NiSource's
energy strategy. Subsequent to the announcement of the Columbia acquisition,
NiSource sold Market Hub Partners, which owns and operates salt cavern gas
storage facilities in Texas and Louisiana, and Columbia completed the
divestiture of its interest in the Cove Point LNG facilities, its retail
electric supply business and four qualifying facility power plants. Columbia
recently announced a definitive agreement for the sale of its electric
generation business, and NiSource announced a definitive agreement to sell its
Miller Pipeline subsidiary. After-tax proceeds from these asset sales are
expected to total approximately $635 million. NiSource is pursuing the sale of
Columbia's propane and petroleum businesses and other smaller non-core
businesses. As part of the SEC order approving the Columbia merger, NiSource has
been ordered to divest its water utility business by November 2003.


                             NISOURCE FINANCE CORP.

     NiSource Finance is a wholly-owned special purpose finance subsidiary of
NiSource that engages in financing activities to raise funds for the business
operations of NiSource and its subsidiaries. NiSource Finance's obligations
under the debt securities will be fully and unconditionally guaranteed by
NiSource.

     NiSource Finance was incorporated in February 2000 under the laws of the
State of Indiana. Before the acquisition of Columbia Energy Group, NiSource
conducted its financing activities through NiSource Capital Markets, Inc., a
first-tier subsidiary of NiSource. We expect NiSource to conduct all future
financing through NiSource Finance. We currently intend to merge NiSource
Capital Markets into NiSource Finance within the next twelve months, subject to
obtaining required consents and approvals.

                                USE OF PROCEEDS

     Unless otherwise described in the applicable prospectus supplement, we will
use the net proceeds from the sale of securities offered by this prospectus and
any applicable prospectus supplement to repay short-term borrowings incurred in
NiSource's November 2000 acquisition of Columbia Energy Group.

                      RATIOS OF EARNINGS TO FIXED CHARGES

     NiSource's corporate predecessors were NiSource Inc. (incorporated in
Indiana) and Columbia Energy Group. The following are ratios of earnings to
fixed charges for each of the periods indicated for each of the corporate
predecessors, and for NiSource on a pro forma basis for the fiscal year ended
December 31, 1999 and the nine months and twelve months ended September 30,
2000, accounting for the acquisition of Columbia Energy Group as a purchase
business combination and giving effect to the acquisition as if it had occurred
at the beginning of the periods presented:


<TABLE>
<CAPTION>
                                                                             NINE          TWELVE
                                                                            MONTHS         MONTHS
                                        FISCAL YEAR ENDED DECEMBER 31        ENDED          ENDED
                                       --------------------------------   -----------   -------------
                                       1995   1996   1997   1998   1999      SEPTEMBER 30, 2000(1)
                                       ----   ----   ----   ----   ----   ---------------------------
<S>                                    <C>    <C>    <C>    <C>    <C>    <C>           <C>
NiSource Inc. (Indiana) Ratio of
  Earnings to Fixed Charges..........  3.28   3.21   3.10   2.87   2.14      2.45           2.30
Columbia Energy Group Ratio of
  Earnings to Fixed Charges..........   N/A   2.78   3.20   3.81   4.03      3.52           4.03
NiSource Pro Forma Ratio of Earnings
  to Fixed Charges...................                              1.56      1.63           1.72
</TABLE>


---------------

(1) Results for the twelve months and nine months ended September 30, 2000 are
    not necessarily indicative of results for the fiscal year ending December
    31, 2000.

                                        6
<PAGE>   10

     For purposes of calculating the ratio of earnings to fixed charges,
"earnings" consist of income from continuing operations before income taxes plus
fixed charges. "Fixed charges" consist of interest on all indebtedness,
amortization of debt expense, the portion of rental expenses on operating leases
deemed to be representative of the interest factor and preferred stock dividend
requirements of consolidated subsidiaries.

                          DESCRIPTION OF CAPITAL STOCK

GENERAL

     The authorized capital stock of NiSource consists of 420,000,000 shares,
$0.01 par value, of which 400,000,000 are common stock and 20,000,000 are
preferred stock. The board of directors has designated 4,000,000 shares of the
preferred stock as Series A Junior Participating Preferred Shares. These shares
are reserved for issuance under NiSource's Shareholder Rights Plan. Each share
of NiSource common stock includes one preferred share purchase right. Each
preferred share purchase right entitles its holder to purchase one-hundredth
(1/100) of a Series A Junior Participating Preferred Share at a price of $60 per
one-hundredth of a share, subject to adjustment. The preferred share purchase
rights will become exercisable if a person or group acquires 25% or more of the
voting power of NiSource or announces a tender or exchange offer following which
the person or group would hold 25% or more of NiSource's voting power. If such
an acquisition were consummated, or if NiSource were acquired by the person or
group in a merger or other business combination, then each preferred share
purchase right would be exercisable for that number of shares of NiSource common
stock or the acquiring company's common stock having a market value of two times
the exercise price of the preferred share purchase right. The preferred share
purchase rights will also become exercisable on or after the date on which the
25% threshold has been triggered, if NiSource is acquired in a merger or other
business combination in which NiSource is not the survivor or in which NiSource
is the survivor but its common stock is changed into or exchanged for securities
of another entity, cash or other property, or 50% or more of the assets or
earning power of NiSource and its subsidiaries is sold. At that time, each
preferred share purchase right will become exercisable for that number of shares
of common stock of the acquiring company having a market value of two times the
exercise price of the preferred share purchase right. The preferred share
purchase rights will not be exercisable in this instance if the person who
acquired sufficient shares of stock to reach the 25% threshold acquired its
stock under an offer at a price and on terms which the board of directors
determines is fair to stockholders and that is in the best interests of
NiSource, provided that the per share price offered in the merger or other
business combination is not less than the price paid in the offer and the form
of consideration offered in the merger or other business combination is the same
as that paid in the offer. NiSource may redeem the preferred share purchase
rights at a price of $.01 per right prior to the occurrence of an event that
causes the preferred share purchase rights to be exercisable for shares of
common stock. The preferred share purchase rights will expire on March 12, 2010.


     The certificate of incorporation of NiSource includes provisions that may
have the effect of deterring hostile takeovers or delaying or preventing changes
in control of management of NiSource. NiSource's board of directors is
classified into three classes of directors with staggered three-year terms. The
directors may be removed only for cause by the affirmative vote of 80% of the
combined voting power of all of the then-outstanding shares of stock of NiSource
voting together as a single class. Unless the board of directors determines
otherwise or except as otherwise required by law, vacancies on the board or
newly-created directorships may be filled only by the affirmative vote of
directors then in office, even though less than a quorum. If the board of
directors or applicable Delaware law confers power on stockholders of NiSource
to fill such a vacancy or newly-created directorship, it may be filled only by
affirmative vote of 80% of the combined voting power of the outstanding shares
of stock of NiSource entitled to vote. Stockholders may not cumulate their
votes, and stockholder action may be taken only at a duly called meeting and not
by written consent. The certificate of incorporation also provides that special
meetings of stockholders may be called only by a majority of the total number of
authorized directors. In addition, NiSource's bylaws contain requirements for
advance notice of stockholder proposals and director


                                        7
<PAGE>   11

nominations. These and other provisions of the certificate of incorporation and
bylaws and Delaware law could discourage potential acquisition proposals and
could delay or prevent a change in control of management of NiSource.

     NiSource is currently subject to the provisions of Section 203 of the
Delaware General Corporation Law regulating corporate takeovers. Section 203
prevents certain Delaware corporations, including those whose securities are
listed on a national securities exchange, such as the New York Stock Exchange,
from engaging, under certain circumstances, in a "business combination," which
includes a merger or sale of more than 10% of the corporation's assets, with any
interested stockholder for three years following the date that the stockholder
became an interested stockholder. An interested stockholder is a stockholder who
acquired 15% or more of the corporation's outstanding voting stock without the
prior approval of the corporation's board of directors.

     The following summaries of provisions of our common stock and preferred
stock are not necessarily complete. You are urged to read carefully NiSource's
certificate of incorporation and bylaws which are incorporated by reference as
exhibits to the registration statement of which this prospectus is a part.

COMMON STOCK

     NiSource common stock is listed on the New York Stock Exchange, the Chicago
Stock Exchange and the Pacific Exchange, under the symbol "NI." Common
stockholders may receive dividends if and when declared by the board of
directors. Dividends may be paid in cash, stock or other form. In certain cases,
common stockholders may not receive dividends until obligations to any preferred
stockholders have been satisfied. All common stock will be fully paid and
non-assessable. Each share of common stock is entitled to one vote in the
election of directors and other matters. Common stockholders are not entitled to
preemptive rights or cumulative voting rights. Common stockholders will be
notified of any stockholders' meeting according to applicable law. If NiSource
liquidates, dissolves or winds-up its business, either voluntarily or
involuntarily, common stockholders will share equally in the assets remaining
after creditors and preferred stockholders are paid.

PREFERRED STOCK

     The board of directors can, without approval of stockholders, issue one or
more series of preferred stock. The board can also determine the number of
shares of each series and the rights, preferences and limitations of each
series, including any dividend rights, voting rights, conversion rights,
redemption rights and liquidation preferences, the number of shares constituting
each series and the terms and conditions of issue. In some cases, the issuance
of preferred stock could delay a change in control of NiSource and make it
harder to remove incumbent management. Under certain circumstances, preferred
stock could also restrict dividend payments to holders of common stock. All
preferred stock will be fully paid and non-assessable.

     The terms of the preferred stock that NiSource may offer will be
established by or pursuant to a resolution of the board of directors of NiSource
and will be issued under certificates of designation or through amendments to
NiSource's certificate of incorporation. If NiSource offers to sell preferred
stock, it will describe the specific terms of the preferred stock in a
supplement to this prospectus. NiSource will also indicate in the supplement
whether the general terms and provisions described in this prospectus apply to
the preferred stock that NiSource may offer.

     The following terms of the preferred stock, as applicable, will be set
forth in a prospectus supplement relating to the preferred stock:

     - the title and stated value;

     - the number of shares NiSource is offering;

     - the liquidation preference per share;

     - the purchase price;
                                        8
<PAGE>   12

     - the dividend rate, period and payment date, and method of calculation of
       dividends;

     - whether dividends will be cumulative or non-cumulative and, if
       cumulative, the date from which dividends will accumulate;

     - the procedures for any auction and remarketing, if any;

     - the provisions for a sinking fund, if any;

     - the provisions for redemption or repurchase, if applicable, and any
       restrictions on NiSource's ability to exercise those redemption and
       repurchase rights;

     - any listing of the preferred stock on any securities exchange or market;

     - voting rights, if any;

     - preemptive rights, if any;

     - restrictions on transfer, sale or other assignment, if any;

     - whether interests in the preferred stock will be represented by
       depositary shares;

     - a discussion of any material or special United States federal income tax
       considerations applicable to the preferred stock;

     - the relative ranking and preferences of the preferred stock as to
       dividend or liquidation rights;

     - any limitations on issuance of any class or series of preferred stock
       ranking senior to or on a parity with the series of preferred stock as to
       dividend or liquidation rights; and

     - any other material specific terms, preferences, rights or limitations of,
       or restrictions on, the preferred stock.

     The terms, if any, on which the preferred stock may be exchanged for or
converted into shares of common stock or any other security and, if applicable,
the conversion or exchange price, or how it will be calculated, and the
conversion or exchange period will be set forth in the applicable prospectus
supplement.

     The preferred stock or any series of preferred stock may be represented, in
whole or in part, by one or more global certificates, which will have an
aggregate liquidation preference equal to that of the preferred stock
represented by the global certificate.

     Each global certificate will:

     - be registered in the name of a depositary or a nominee of the depositary
       identified in the prospectus supplement;

     - be deposited with such depositary or nominee or a custodian for the
       depositary; and

     - bear a legend regarding the restrictions on exchanges and registration of
       transfer and any other matters as may be provided for under the
       certificate of designation.

                       DESCRIPTION OF THE DEBT SECURITIES


     NiSource Finance may issue the debt securities, in one or more series, from
time to time under an Indenture, dated as of November 14, 2000, among NiSource
Finance, NiSource, as guarantor, and The Chase Manhattan Bank, as trustee. The
Chase Manhattan Bank, as trustee under the Indenture, will act as indenture
trustee for the purposes of the Trust Indenture Act. We have filed a copy of the
Indenture as an exhibit to the registration statement of which this prospectus
forms a part.


     This section briefly summarizes some of the terms of the debt securities
and the Indenture. This section does not contain a complete description of the
debt securities or the Indenture. The description of

                                        9
<PAGE>   13

the debt securities is qualified in its entirety by the provisions of the
Indenture. References to section numbers in this description of the debt
securities, unless otherwise indicated, are references to section numbers of the
Indenture.

GENERAL

     The Indenture does not limit the amount of debt securities that may be
issued. The Indenture provides for the issuance of debt securities from time to
time in one or more series. The terms of each series of debt securities may be
established in a supplemental indenture or in resolutions of NiSource Finance's
Board of Directors or a committee of the board.

     The debt securities:

     - are direct senior unsecured obligations of NiSource Finance;

     - are equal in right of payment to any other senior unsecured obligations
       of NiSource Finance; and

     - are guaranteed on a senior unsecured basis by NiSource.

     NiSource Finance is a special purpose financing subsidiary formed solely as
a financing vehicle for NiSource and its subsidiaries. Therefore, the ability of
NiSource Finance to pay its obligations under the debt securities is dependent
upon the receipt by it of payments from NiSource. If NiSource were not to make
such payments for any reason, the holders of the debt securities would have to
rely on the enforcement of NiSource's guarantee described below.

     If NiSource Finance uses this prospectus to offer debt securities, an
accompanying prospectus supplement will describe the following terms of the debt
securities being offered, to the extent applicable:

     - the title;

     - any limit on the aggregate principal amount;

     - the date or dates on which NiSource Finance will pay principal;

     - the right, if any, to extend the date or dates on which NiSource Finance
       will pay principal;

     - the interest rates or the method of determining them and the date
       interest begins to accrue;

     - the interest payment dates and the regular record dates for any interest
       payment dates;

     - the right, if any, to extend the interest payment periods and the
       duration of any extension;

     - the place or places where NiSource Finance will pay principal and
       interest;

     - the terms and conditions of any optional redemption, including the date
       after which, and the price or prices at which, NiSource Finance may
       redeem securities;

     - the terms and conditions of any optional purchase or repayment, including
       the date after which, and the price or prices at which, holders may
       require NiSource Finance to purchase, or a third party may require
       holders to sell, securities;

     - the terms and conditions of any mandatory or optional sinking fund
       redemption, including the date after which, and the price or prices at
       which, NiSource Finance may redeem securities;

     - whether bearer securities will be issued;

     - the denominations in which NiSource Finance will issue securities;

     - the currency or currencies in which NiSource Finance will pay principal
       and interest;

     - any index or indices used to determine the amount of payments;

     - the portion of principal payable on declaration of acceleration of
       maturity;

                                       10
<PAGE>   14

     - any additional events of default or covenants of NiSource Finance or
       NiSource applicable to the debt securities;

     - whether NiSource Finance will pay additional amounts in respect of taxes
       and similar charges on debt securities held by a United States alien and
       whether NiSource Finance may redeem those debt securities rather than pay
       additional amounts;

     - whether NiSource Finance will issue the debt securities in whole or in
       part in global form and, in such case, the depositary for such global
       securities and the circumstances under which beneficial owners of
       interests in the global security may exchange such interest for
       securities;

     - the date or dates after which holders may convert the securities into
       shares of NiSource common stock or preferred stock and the terms for that
       conversion; and

     - any other terms of the securities.

     The Indenture does not give holders of debt securities protection in the
event of a highly leveraged transaction or other transaction involving NiSource
Finance or NiSource. The Indenture also does not limit the ability of NiSource
Finance or NiSource to incur indebtedness or to declare or pay dividends on its
capital stock.

GUARANTEE OF NISOURCE


     NiSource will fully and unconditionally guarantee to each holder of debt
securities and to the indenture trustee and its successors all the obligations
of NiSource Finance under the debt securities, including the due and punctual
payment of the principal of, and premium, if any, and interest, if any, on the
debt securities. The guarantee applies whether the payment is due at maturity,
on an interest payment date or as a result of acceleration, redemption or
otherwise. The guarantee includes payment of interest on the overdue principal
of and interest, if any, on the debt securities (if lawful) and all other
obligations of NiSource Finance under the Indenture. The guarantee will remain
valid even if the Indenture is found to be invalid. NiSource is obligated under
the guarantee to pay any guaranteed amount immediately after NiSource Finance's
failure to do so.



     NiSource is a holding company with no independent business operations or
source of income of its own. It conducts substantially all of its operations
through its subsidiaries and, as a result, NiSource depends on the earnings and
cash flow of, and dividends or distributions from, its subsidiaries to provide
the funds necessary to meet its debt and contractual obligations. A substantial
portion of NiSource's consolidated assets, earnings and cash flow is derived
from the operation of its regulated utility subsidiaries, whose legal authority
to pay dividends or make other distributions to NiSource is subject to
regulation. Northern Indiana Public Service Company's debt indenture also
provides that Northern Indiana will not declare or pay any dividends on its
common stock owned by NiSource except out of earned surplus or net profits.
Furthermore, as long as any shares of Northern Indiana's cumulative preferred
stock are outstanding, Northern Indiana may not declare or pay cash dividends on
its common shares in excess of 75% of its net income, provided that Northern
Indiana may declare and pay cash dividends if the sum of (1) Northern Indiana's
capital applicable to stock junior to the cumulative preferred stock plus (2)
the surplus, after giving effect to such dividends, is at least 25% of the sum
of (a) all of Northern Indiana's obligations under any outstanding bonds, notes,
debentures or other securities plus (b) Northern Indiana's total capital and
surplus. Future dividends will depend upon adequate retained earnings, adequate
future earnings and the absence of adverse developments. In addition, NiSource
is registered as a holding company under the Public Utility Holding Company Act
of 1935. As a result, the corporate and financial activities of NiSource and
each of its subsidiaries (including their ability to pay dividends to NiSource)
are subject to regulation by the SEC.


     NiSource's holding company status also means that its right to participate
in any distribution of the assets of any of its subsidiaries upon liquidation,
reorganization or otherwise is subject to the prior claims of the creditors of
each of the subsidiaries (except to the extent that the claims of NiSource
itself as a

                                       11
<PAGE>   15

creditor of a subsidiary may be recognized). Since this is true for NiSource, it
is also true for the creditors of NiSource (including the holders of the debt
securities).

CONVERSION RIGHTS

     The terms, if any, on which a series of debt securities may be exchanged
for or converted into shares of common stock or preferred stock of NiSource will
be set forth in the applicable prospectus supplement.

DENOMINATION, REGISTRATION AND TRANSFER

     NiSource Finance may issue the debt securities as registered securities in
certificated form or as global securities as described under the heading
"Book-Entry Issuance." Unless otherwise specified in the applicable prospectus
supplement, NiSource Finance will issue registered debt securities in
denominations of $1,000 or integral multiples of $1,000. (See Section 302.)

     If NiSource Finance issues the debt securities as registered securities,
NiSource Finance will keep at one of its offices or agencies a register in which
it will provide for the registration and transfer of the debt securities.
NiSource Finance will appoint that office or agency the security registrar for
the purpose of registering and transferring the debt securities.

     The holder of any registered debt security may exchange the debt security
for registered debt securities of the same series having the same stated
maturity date and original issue date, in any authorized denominations, in like
tenor and in the same aggregate principal amount. The holder may exchange those
debt securities by surrendering them in a place of payment maintained for this
purpose at the office or agency NiSource Finance has appointed securities
registrar. Holders may present the debt securities for exchange or registration
of transfer, duly endorsed or accompanied by a duly executed written instrument
of transfer satisfactory to NiSource Finance and the securities registrar. No
service charge will apply to any exchange or registration of transfer, but
NiSource Finance may require payment of any taxes and other governmental charges
as described in the Indenture. (See Section 305.)

     If debt securities of any series are redeemed, NiSource Finance will not be
required to issue, register transfer of or exchange any debt securities of that
series during the 15 business day period immediately preceding the day the
relevant notice of redemption is given. That notice will identify the serial
numbers of the debt securities being redeemed. After notice is given, NiSource
Finance will not be required to issue, register the transfer of or exchange any
debt securities that have been selected to be either partially or fully
redeemed, except the unredeemed portion of any debt security being partially
redeemed. (See Section 305.)

PAYMENT AND PAYING AGENTS

     Unless otherwise indicated in the applicable prospectus supplement, on each
interest payment date, NiSource Finance will pay interest on each debt security
to the person in whose name that debt security is registered as of the close of
business on the record date relating to that interest payment date. If NiSource
Finance defaults in the payment of interest on any debt security, it may pay
that defaulted interest to the registered owner of that debt security:

     - as of the close of business on a date that the indenture trustee selects,
       which may not be more than 15 days or less than 10 days before the date
       NiSource Finance proposes to pay the defaulted interest, or

     - in any other lawful manner that does not violate the requirements of any
       securities exchange on which that debt security is listed and that the
       indenture trustee believes is acceptable.

(See Section 307.)

     Unless otherwise indicated in the applicable prospectus supplement,
NiSource Finance will pay the principal of and any premium or interest on the
debt securities when they are presented at the office of the

                                       12
<PAGE>   16

indenture trustee, as paying agent. NiSource Finance may change the place of
payment on the debt securities, appoint one or more additional paying agents,
and remove any paying agent.

REDEMPTION

     The applicable prospectus supplement will contain the specific terms on
which NiSource Finance may redeem a series of debt securities prior to its
stated maturity. NiSource Finance will send a notice of redemption to holders at
least 30 days but not more than 60 days prior to the redemption date. The notice
will state:

     - the redemption date;

     - the redemption price;

     - if less than all of the debt securities of the series are being redeemed,
       the particular debt securities to be redeemed (and the principal amounts,
       in the case of a partial redemption);

     - that on the redemption date, the redemption price will become due and
       payable and any applicable interest will cease to accrue on and after
       that date;

     - the place or places of payment; and

     - whether the redemption is for a sinking fund.

(See Section 1104.)


     On or before any redemption date, NiSource Finance will deposit an amount
of money with the indenture trustee or with a paying agent sufficient to pay the
redemption price. (See Section 1105.)



     If NiSource Finance is redeeming less than all the debt securities, the
indenture trustee will select the debt securities to be redeemed using a method
it considers fair and appropriate. After the redemption date, holders of
redeemed debt securities will have no rights with respect to the debt securities
except the right to receive the redemption price and any unpaid interest to the
redemption date. (See Section 1103.)


CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

     Neither NiSource Finance nor NiSource shall consolidate or merge with any
other corporation or convey, transfer or lease substantially all of its assets
or properties to any entity unless:

     - that corporation or entity is organized under the laws of the United
       States or any state thereof;

     - that corporation or entity assumes NiSource Finance's or NiSource's
       obligations, as applicable, under the Indenture;

     - after giving effect to the transaction, NiSource Finance and NiSource are
       not in default under the Indenture; and

     - NiSource Finance or NiSource, as applicable, delivers to the indenture
       trustee an officer's certificate and an opinion of counsel to the effect
       that the transaction complies with the Indenture.

(See Section 801.)

     The Indenture does not give holders of the debt securities protection in
the event of a highly leveraged transaction or other transaction involving
NiSource Finance or NiSource. The Indenture also does not limit the ability of
NiSource Finance to incur indebtedness or to declare or pay dividends on its
capital stock.

LIMITATION ON LIENS

     As long as any debt securities remain outstanding, neither NiSource
Finance, NiSource nor any subsidiary of NiSource other than a utility may issue,
assume or guarantee any debt secured by any

                                       13
<PAGE>   17

mortgage, security interest, pledge, lien or other encumbrance on any property
owned by NiSource Finance, NiSource or that subsidiary, except intercompany
indebtedness, without also securing the debt securities equally and ratably with
(or prior to) the new debt, unless the total amount of all of the secured debt
would not exceed 10% of the consolidated net tangible assets of NiSource and its
subsidiaries (other than utilities).

     In addition, the lien limitations do not apply to NiSource Finance's,
NiSource's and any subsidiary's ability to do the following:

     - create mortgages on any property and on certain improvements and
       accessions on such property acquired, constructed or improved after the
       date of the Indenture;

     - assume existing mortgages on any property or indebtedness of an entity
       which is merged with or into, or consolidated with NiSource Finance,
       NiSource and any subsidiary;

     - assume existing mortgages on any property or indebtedness of an entity
       existing at the time it becomes a subsidiary;

     - create mortgages to secure debt of a subsidiary to NiSource or to another
       subsidiary;

     - create mortgages in favor of governmental entities to secure payment
       under a contract or statute or mortgages to secure the financing of
       constructing or improving property, including mortgages for pollution
       control or industrial revenue bonds;

     - create mortgages to secure debt of NiSource or its subsidiaries maturing
       within 12 months and created in the ordinary course of business;

     - create mortgages to secure the cost of exploration, drilling or
       development of natural gas, oil or other mineral property;

     - to continue mortgages existing on the date of the Indenture; and

     - create mortgages to extend, renew or replace indebtedness secured by any
       mortgage referred to above provided that the principal amount of
       indebtedness and the property securing the indebtedness shall not exceed
       the amount secured by the mortgage being extended, renewed or replaced.


(See Section 1008.)


EVENTS OF DEFAULT

     The Indenture provides, with respect to any outstanding series of debt
securities, that any of the following events constitutes an "Event of Default":

     - NiSource Finance defaults in the payment of any interest upon any debt
       security of that series that becomes due and payable and the default
       continues for 60 days;

     - NiSource Finance defaults in the payment of principal of or any premium
       on any debt security of that series when due at its maturity, on
       redemption, by declaration or otherwise and the default continues for
       three business days;

     - NiSource Finance defaults in the deposit of any sinking fund payment when
       due and the default continues for three business days;

     - NiSource Finance or NiSource defaults in the performance of or breaches
       any covenant or warranty in the Indenture for 90 days after written
       notice to NiSource Finance and NiSource from the indenture trustee or to
       NiSource Finance, NiSource and the indenture trustee from the holders of
       at least 33% of the outstanding debt securities of that series;

     - NiSource Finance or NiSource Capital Markets defaults under any bond,
       debenture, note or other evidence of indebtedness for money borrowed by
       NiSource Finance or NiSource Capital Markets,

                                       14
<PAGE>   18

       or NiSource Finance or NiSource Capital Markets defaults under any
       mortgage, indenture or instrument under which there may be issued,
       secured or evidenced indebtedness constituting a failure to pay in excess
       of $50,000,000 of the principal or interest when due and payable, and in
       the event such debt has become due as the result of an acceleration, such
       acceleration is not rescinded or annulled or such debt is not paid within
       60 days after written notice to NiSource Finance and NiSource from the
       indenture trustee or to NiSource Finance, NiSource and the indenture
       trustee from the holders of at least 33% of the outstanding debt
       securities of that series;

     - the NiSource guarantee ceases to be in full force and effect in any
       material respect or is disaffirmed or denied (other than according to its
       terms), or is found to be unenforceable or invalid; or

     - certain events of bankruptcy, insolvency or reorganization of NiSource
       Finance, NiSource Capital Markets or NiSource.

(See Section 501.)

     If an Event of Default occurs with respect to debt securities of a
particular series, the indenture trustee or the holders of 33% in principal
amount of the outstanding debt securities of that series may declare the debt
securities of that series due and payable immediately. (See Section 502.)

     The holders of a majority in principal amount of the outstanding debt
securities of a particular series will have the right to direct the time, method
and place of conducting any proceeding for any remedy available to the indenture
trustee under the Indenture, or exercising any trust or power conferred on the
indenture trustee with respect to the debt securities of that series. The
indenture trustee may refuse to follow directions that are in conflict with law
or the Indenture, that expose the indenture trustee to personal liability or
that are unduly prejudicial to other holders. The indenture trustee may take any
other action it deems proper that is not inconsistent with those directions.
(See Section 512.)

     The holders of a majority in principal amount of the outstanding debt
securities of any series may waive any past default under the Indenture and its
consequences, except a default:

     - in respect of a payment of principal of, or premium, if any, or interest
       on any debt security; or

     - in respect of a covenant or provision that cannot be modified or amended
       without the consent of the holder of each affected debt security.

(See Section 513.)

     At any time after the holders of the debt securities of a series declare
that the debt securities of that series are due and immediately payable, a
majority in principal amount of the outstanding holders of debt securities of
that series may rescind and cancel the declaration and its consequences: (1)
before the indenture trustee has obtained a judgment or decree for money, (2) if
all defaults (other than the non-payment of principal which have become due
solely by the declaration) have been waived or cured, and (3) NiSource or
NiSource Finance has paid or deposited with the indenture trustee an amount
sufficient to pay:

     - all overdue interest on the debt securities of that series;

     - the principal of, and premium, if any, or interest on any debt securities
       of that series which are due other than by the declaration;

     - interest on overdue interest (if lawful); and

     - sums paid or advanced by and amounts due the indenture trustee under the
       Indenture.

(See Section 502.)

                                       15
<PAGE>   19

MODIFICATION OF INDENTURE

     NiSource Finance, NiSource and the indenture trustee may modify or amend
the Indenture, without the consent of the holders of any debt securities, for
any of the following purposes:

     - to evidence the succession of another person as obligor under the
       Indenture;


     - to add to NiSource Finance's or NiSource's covenants or to surrender any
       right or power conferred on NiSource Finance or NiSource under the
       Indenture;


     - to add events of default;

     - to add or change any provisions of the Indenture to provide that bearer
       securities may be registrable as to principal, to change or eliminate any
       restrictions on the payment of principal or premium on registered
       securities or of principal or premium or any interest on bearer
       securities, to permit registered securities to be exchanged for bearer
       securities or to permit the issuance of securities in uncertificated form
       (so long as the modification or amendment does not materially adversely
       affect the interest of the holders of debt securities of any series);

     - to change or eliminate any provisions of the Indenture (so long as there
       are no outstanding debt securities entitled to the benefit of the
       provision);

     - to secure the debt securities;

     - to establish the form or terms of debt securities of any series;

     - to evidence or provide for the acceptance or appointment by a successor
       indenture trustee or facilitate the administration of the trusts under
       the Indenture by more than one indenture trustee;

     - to cure any ambiguity, defect or inconsistency in the Indenture (so long
       as the cure or modification does not materially adversely affect the
       interest of the holders of debt securities of any series);

     - to effect assumption by NiSource or one of its subsidiaries of NiSource
       Finance's obligations under the Indenture; or

     - to conform the Indenture to any amendment of the Trust Indenture Act.

(See Section 901.)

     The Indenture provides that we and the indenture trustee may amend the
Indenture or the debt securities with the consent of the holders of a majority
in principal amount of the then outstanding debt securities of each series
affected by the amendment voting as one class. However, without the consent of
each holder of any outstanding debt securities affected, an amendment or
modification may not, among other things:

     - change the stated maturity of the principal or interest on any debt
       security;

     - reduce the principal amount of, rate of interest on, or premium payable
       upon the redemption of, any debt security;

     - change the method of calculating the rate of interest on any debt
       security;

     - change any obligation of NiSource Finance to pay additional amounts in
       respect of any debt security;

     - reduce the principal amount of a discount security that would be payable
       upon acceleration of its maturity;

     - change the place or currency of payment of principal of, or any premium
       or interest on, any debt security;

     - impair a holder's right to institute suit for the enforcement of any
       payment after the stated maturity or after any redemption date or
       repayment date;
                                       16
<PAGE>   20

     - reduce the percentage of holders of debt securities necessary to modify
       or amend the Indenture or to consent to any waiver under the Indenture;

     - change any obligation of NiSource Finance to maintain an office or agency
       in each place of payment or to maintain an office or agency outside the
       United States;

     - modify the obligations of NiSource under its guarantee in any way adverse
       to the interests of the holders of the debt securities; and

     - modify these requirements or reduce the percentage of holders of debt
       securities necessary to waive any past default of certain covenants.

(See Section 902.)

SATISFACTION AND DISCHARGE

     Under the Indenture, NiSource Finance can terminate its obligations with
respect to debt securities of any series not previously delivered to the
indenture trustee for cancellation when those debt securities:

     - have become due and payable;

     - will become due and payable at their stated maturity within one year; or

     - are to be called for redemption within one year under arrangements
       satisfactory to the indenture trustee for giving notice of redemption.


     NiSource Finance may terminate its obligations with respect to the debt
securities of that series by depositing with the indenture trustee, as trust
funds in trust dedicated solely for that purpose, an amount sufficient to pay
and discharge the entire indebtedness on the debt securities of that series. In
that case, the Indenture will cease to be of further effect and NiSource
Finance's obligations will be satisfied and discharged with respect to that
series (except as to NiSource Finance's obligations to pay all other amounts due
under the Indenture and to provide certain officers' certificates and opinions
of counsel to the indenture trustee). At the expense of NiSource Finance, the
indenture trustee will execute proper instruments acknowledging the satisfaction
and discharge. (See Section 401.)


BOOK-ENTRY ISSUANCE

     Unless otherwise specified in the applicable prospectus supplement,
NiSource Finance will issue any debt securities offered under this prospectus as
"global securities." We will describe the specific terms for issuing any debt
security as a global security in the prospectus supplement relating to that debt
security.

     Unless otherwise specified in the applicable prospectus supplement, The
Depository Trust Company, or DTC, will act as the depositary for any global
securities. NiSource Finance will issue global securities as fully registered
securities registered in the name of DTC's nominee, Cede & Co. NiSource Finance
will issue one or more fully registered global securities for each issue of debt
securities, each in the aggregate principal or stated amount of such issue, and
will deposit the global securities with DTC.

     DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law, a
member of the Federal Reserve System, a "clearing corporation" within the
meaning of the New York Uniform Commercial Code, and a "clearing agency"
registered under the provisions of Section 17A of the Securities Exchange Act.
DTC holds securities that its participants deposit with DTC. DTC also
facilitates the settlement among participants of securities transactions, such
as transfers and pledges, in deposited securities through electronic
computerized book-entry changes in participants' accounts, thereby eliminating
the need for physical movement of securities certificates. DTC's direct
participants include securities brokers and dealers, banks, trust companies,
clearing corporations and certain other organizations. DTC is owned by a number
of its direct participants and by the New York Stock Exchange, Inc., the
American Stock Exchange, Inc. and the National Association of Securities
Dealers, Inc. Access to DTC's book-entry

                                       17
<PAGE>   21

system is also available to others, such as securities brokers and dealers,
banks and trust companies, that clear through or maintain a custodial
relationship with a direct participant. The rules applicable to DTC and its
participants are on file with the SEC.

     Purchases of securities under DTC's system must be made by or through a
direct participant, which will receive a credit for such securities on DTC's
records. The ownership interest of each actual purchaser of each security -- the
beneficial owner -- is in turn recorded on the records of direct and indirect
participants. Beneficial owners will not receive written confirmation from DTC
of their purchases, but they should receive written confirmations providing
details of the transactions, as well as periodic statements of their holdings,
from the participants through which they entered into the transactions.
Transfers of ownership interest in the securities are accomplished by entries
made on the books of participants acting on behalf of beneficial owners.
Beneficial owners will not receive certificates representing their securities,
except in the event that use of the book-entry system for the securities is
discontinued.

     To facilitate subsequent transfers, all global securities that are
deposited with, or on behalf of, DTC are registered in the name of DTC's
nominee, Cede & Co. The deposit of global securities with, or on behalf of, DTC
and their registration in the name of Cede & Co. effect no change in beneficial
ownership. DTC has no knowledge of the actual beneficial owners of the
securities; DTC's records reflect only the identity of the direct participants
to whose accounts such securities are credited, which may or may not be the
beneficial owners. The participants will remain responsible for keeping account
of their holdings on behalf of their customers.

     Conveyance of notices and other communications by DTC to direct
participants, by direct participants to indirect participants and by direct and
indirect participants to beneficial owners will be governed by arrangements
among them, subject to any statutory or regulatory requirements as may be in
effect from time to time.

     Neither DTC nor Cede & Co. will consent or vote with respect to the global
securities. Under its usual procedures, DTC will mail an omnibus proxy to
NiSource Finance as soon as possible after the applicable record date. The
omnibus proxy assigns Cede & Co.'s consenting or voting rights to those direct
participants to whose accounts the securities are credited on the applicable
record date (identified in a listing attached to the omnibus proxy).

     Redemption proceeds, principal payments and any premium, interest or other
payments on the global securities will be made to Cede & Co., as nominee of DTC.
DTC's practice is to credit direct participants' accounts on the applicable
payment date in accordance with their respective holdings shown on DTC's
records, unless DTC has reason to believe that it will not receive payment on
that date. Payments by participants to beneficial owners will be governed by
standing instructions and customary practices, as is the case with securities
held for the accounts of customers in bearer form or registered in "street
name," and will be the responsibility of the participant and not of DTC,
NiSource Finance, NiSource or the indenture trustee, subject to any statutory or
regulatory requirements in effect at the time. Payment of redemption payments,
principal and any premium, interest or other payments to DTC is the
responsibility of NiSource Finance and the applicable paying agent, disbursement
of payments to direct participants will be the responsibility of DTC, and
disbursement of payments to the beneficial owners will be the responsibility of
direct and indirect participants.

     If applicable, redemption notices will be sent to Cede & Co. If less than
all of the debt securities of like tenor and terms are being redeemed, DTC's
practice is to determine by lot the amount of the interest of each direct
participant in such issue to be redeemed.

     A beneficial owner electing to have its interest in a global security
repaid by NiSource Finance will give any required notice through its participant
and will effect delivery of its interest by causing the direct participant to
transfer the participant's interest in the global securities on DTC's records to
the appropriate party. The requirement for physical delivery in connection with
a demand for repayment will be deemed satisfied when the ownership rights in the
global securities are transferred on DTC's records.

                                       18
<PAGE>   22

     DTC may discontinue providing its services as securities depositary with
respect to the global securities at any time by giving reasonable notice to
NiSource Finance or the indenture trustee. Under such circumstances, in the
event that a successor securities depositary is not obtained, certificates for
the securities are required to be printed and delivered.

     NiSource Finance may decide to discontinue use of the system of book-entry
transfers through DTC (or a successor securities depositary). In that event,
certificates for the securities will be printed and delivered.

     We have provided the foregoing information with respect to DTC to the
financial community for information purposes only. We do not intend the
information to serve as a representation, warranty or contract modification of
any kind. We have received the information in this section concerning DTC and
DTC's system from sources that we believe to be reliable, but we take no
responsibility for the accuracy of this information.

GOVERNING LAW

     The Indenture and the debt securities are governed by the internal laws of
the State of New York.

INFORMATION CONCERNING THE INDENTURE TRUSTEE

     Prior to default, the indenture trustee will perform only those duties
specifically set forth in the Indenture. After default, the indenture trustee
will exercise the same degree of care as a prudent individual would exercise in
the conduct of his or her own affairs. The indenture trustee is under no
obligation to exercise any of the powers vested in it by the Indenture at the
request of any holder of debt securities unless the holder offers the indenture
trustee reasonable indemnity against the costs, expenses and liability that the
indenture trustee might incur in exercising those powers. The indenture trustee
is not required to expend or risk its own funds or otherwise incur personal
financial liability in the performance of its duties if it reasonably believes
that it may not receive repayment or adequate indemnity. (See Section 601.)


     The indenture trustee, The Chase Manhattan Bank, is also the indenture
trustee for NiSource Capital Markets' senior and subordinated debt indentures
and the indenture governing the debenture portion of NiSource's Stock
Appreciation Income Linked Securities ("SAILS"). The Chase Manhattan Bank is the
property trustee, and Chase Manhattan Bank Delaware is the Delaware trustee, for
the preferred securities included in NiSource's Premium Income Equity Securities
("PIES(SM)"). The Chase Manhattan Bank is the purchase contract agent and
collateral agent for the NiSource PIES and SAILS. The Chase Manhattan Bank also
lends to Columbia Energy Group and extends a letter of credit facility to
NiSource Capital Markets. ChaseMellon Shareholder Services, L.L.C., an affiliate
of The Chase Manhattan Bank, is the transfer agent and registrar for the common
stock, the rights agent for NiSource's preferred stock purchase rights and the
exchange agent for the merger in connection with NiSource's acquisition of
Columbia.


                              PLAN OF DISTRIBUTION

     We may sell the securities to or through underwriters, through dealers or
agents, directly to you or through a combination of these methods. The
prospectus supplement with respect to any offering of securities will describe
the specific terms of the securities being offered, including:

     - the name or names of any underwriters, dealers or agents;

     - the purchase price of the securities and the proceeds to NiSource or
       NiSource Finance from the sale;

     - any underwriting discounts and commissions or agency fees and other items
       constituting underwriters' or agents' compensation;

     - any initial public offering price;

     - any discounts or concessions allowed or reallowed or paid to dealers; and
                                       19
<PAGE>   23

     - any securities exchange on which the offered securities may be listed.

     Through Underwriters.  If we use underwriters in the sale of the
securities, the underwriters will acquire the offered securities for their own
account. We will execute an underwriting agreement with an underwriter or
underwriters once an agreement for sale of the securities is reached. The
underwriters may resell the offered securities in one or more transactions,
including negotiated transactions, at a fixed public offering price or at
varying prices determined at the time of sale. The underwriters may sell the
offered securities directly or through underwriting syndicates represented by
managing underwriters. Unless otherwise stated in the prospectus supplement
relating to offered securities, the obligations of the underwriters to purchase
those offered securities will be subject to certain conditions, and the
underwriters will be obligated to purchase all of those offered securities if
they purchase any of them.

     Through Dealers.  If we use a dealer to sell the securities, we will sell
the offered securities to the dealer as principal. The dealer may then resell
those offered securities at varying prices determined at the time of resale. Any
initial public offering price and any discounts or concessions allowed or
reallowed or paid to dealers may be changed from time to time.

     Through Agents.  If we use agents in the sale of securities, we may
designate one or more agents to sell offered securities. Unless otherwise stated
in a prospectus supplement, the agents will agree to use their best efforts to
solicit purchases for the period of their appointment.

     Directly to Purchasers.  We may sell the offered securities directly to one
or more purchasers. In this case, no underwriters, dealers or agents would be
involved. We will describe the terms of our direct sales in our prospectus
supplement.

     General Information.  A prospectus supplement will state the name of any
underwriter, dealer or agent and the amount of any compensation, underwriting
discounts or concessions paid, allowed or reallowed to them. A prospectus
supplement will also state the proceeds to us from the sale of offered
securities, any initial public offering price and other terms of the offering of
those offered securities.

     Our agents, underwriters and dealers, or their affiliates, may be customers
of, engage in transactions with or perform services for us in the ordinary
course of business.

     We may authorize agents, underwriters or dealers to solicit offers by
certain institutions to purchase offered securities from us at the public
offering price and on terms described in the related prospectus supplement
pursuant to delayed delivery contracts providing for payment and delivery on a
specified date in the future. If we use delayed delivery contracts, we will
disclose that we are using them in our prospectus supplement and will tell you
when we will demand payment and delivery of the securities. The delayed delivery
contracts will be subject only to the conditions we set forth in our prospectus
supplement.

     We may enter into agreements to indemnify agents, underwriters and dealers
against certain civil liabilities, including liabilities under the Securities
Act of 1933.

                                 LEGAL OPINIONS


     Schiff Hardin & Waite, Chicago, Illinois, will pass upon the validity of
the securities offered by this prospectus for us. The opinions with respect to
the securities may be subject to assumptions regarding future action to be taken
by us and the trustee, if applicable, in connection with the issuance and sale
of the securities, the specific terms of the securities and other matters that
may affect the validity of securities but that cannot be ascertained on the date
of those opinions. Peter V. Fazio, Jr., a partner of the firm who also serves as
general counsel of NiSource, holds approximately 11,400 shares of NiSource
common stock.


                                       20
<PAGE>   24

                                    EXPERTS

     The consolidated financial statements and schedules of NiSource Inc.
(incorporated in Indiana) and the consolidated financial statements of Columbia
Energy Group incorporated by reference herein have been audited by Arthur
Andersen LLP, independent public accountants, as indicated in their reports with
respect thereto, and are incorporated by reference herein in reliance upon the
authority of said firm as experts in giving said reports.

                                       21
<PAGE>   25

                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The expenses in connection with the issuance and distribution of the
securities covered hereby are as follows (all amounts other than the Securities
and Exchange Commission filing fee are estimated):


<TABLE>
<S>                                                           <C>
Securities and Exchange Commission filing fee...............  $660,000
Trustees' fees..............................................    35,000
Accounting fees and expenses................................    20,000
Legal fees and expenses.....................................    60,000
Transfer agent and registrar fees...........................     2,000
Printing and engraving expenses.............................   175,000
Miscellaneous expenses......................................    23,000
                                                              --------
          Total.............................................  $975,000
                                                              ========
</TABLE>


---------------

* To be completed by amendment.

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Section B.1. of Article V of NiSource Inc.'s Amended and Restated
Certificate of Incorporation provides that no director shall be personally
liable to the corporation or its stockholders for monetary damages for breach of
fiduciary duty as a director.

     Section B.2. of Article V of NiSource Inc.'s Amended and Restated
Certificate of Incorporation and Section 145 of the General Corporation Law of
Delaware provide that NiSource Inc. will, to the fullest extent permitted by
applicable law, as then in effect, indemnify any person who was or is a party or
is threatened to be made a party to any threatened, pending or completed
investigation, claim, action, suit or proceeding, whether civil or criminal,
administrative or investigative, by reason of the fact that such person is or
was a director, officer, employee or agent of the corporation, or is or was
serving at the request of the corporation as a director, officer, employee or
agent of another corporation (including NiSource Finance Corp.), partnership,
joint venture, trust or other enterprise (including, without limitation, any
employee benefit plan) against all expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement actually and reasonably incurred
by such person in connection with any such investigation, claim, action, suit or
proceeding, provided that such person acted in good faith and in a manner that
he or she reasonably believed to be in or not opposed to the best interests of
the corporation, and, with respect to any criminal action or proceeding, if he
or she had no reason to believe his or her conduct was unlawful.

     Section B.2. of Article V of NiSource Inc.'s Amended and Restated
Certificate of Incorporation and Section 145 of the General Corporation Law of
Delaware also provide that if the investigation, claim, action, suit or
proceeding is a derivative action (meaning one brought by or on behalf of the
corporation), NiSource Inc. will, to the extent permitted by applicable law, as
then in effect, indemnify any person against expenses actually and reasonably
incurred by such person in connection with the defense or settlement of such
investigation, claim, action, suit or proceeding if incurred by such person in
connection with the defense or settlement of such investigation, claim, action,
suit or proceeding if such person acted in good faith and in a manner such
person reasonably believed to be in or not opposed to the best interests of the
corporation, except that no indemnification may be made in respect to any
investigation, claim, action, suit, proceeding or matter as to which such person
shall have been adjudged to be liable for negligence or misconduct in the
performance of his or her duty to the corporation, unless and only to the extent
that the Delaware Court of Chancery or the court in which the action or suit is
brought determines upon application that, despite the adjudication of liability
but in light of the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expense as the court deems proper.

                                      II-1
<PAGE>   26


     NiSource Inc.'s Amended and Restated Certificate of Incorporation and the
General Corporation Law of Delaware permits NiSource Inc. and its subsidiaries
to purchase and maintain insurance on behalf of any person who is a director or
officer for acts committed in their capacities as such directors or officers.
NiSource Inc. currently maintains such liability insurance.


     Article VIII of NiSource Finance Corp.'s By-Laws provides for
indemnification by NiSource Finance Corp. of any person who was or is a party or
is threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative,
formal or informal by reason of the fact such person was a director, officer,
employee or agent of NiSource Finance Corp., or is or was serving at the request
of NiSource Finance Corp. as a director, officer, employee, agent, partner,
trustee or member or in another authorized capacity of or for another
corporation, unincorporated association, business trust, partnership, joint
venture, trust or other legal entity, against expenses (including attorneys'
fees), judgments, penalties, fines and amounts paid in settlement actually and
reasonably incurred by such person in connection with such threatened, pending
or completed action, suit or proceeding, whether civil, criminal, administrative
or investigative, formal or informal, if such person acted in good faith and in
a manner such person reasonably believed to be in or not opposed to the best
interest of NiSource Finance Corp. and, with respect to any criminal action or
proceeding, had no reasonable cause to believe his or her conduct was unlawful;
except that, in the case of an action by or in the right of NiSource Finance
Corp. to procure judgment in its favor, no indemnification shall be made in
respect of any claim, issue, or matter as to which such person shall have been
adjudged to be liable for willful negligence or misconduct in the performance of
such person's duties to NiSource Finance Corp. unless and only to the extent
that a court of equity or the court in which such action was pending shall
determine upon application that, despite the adjudication of liability but in
view of all the circumstances of the case, such person is fairly and reasonably
entitled to indemnity for such expenses which such court shall deem proper. To
the extent such a person is successful on the merits or otherwise in defense of
any action, claim, issue or matter referred to herein, such person shall be
indemnified against expenses (including attorneys' fees), judgments, penalties,
fines and amounts paid in settlement actually and reasonably incurred by such
person in such action, claim, issue or matter.


     As authorized under NiSource Finance Corp.'s By-Laws and the Indiana
Business Corporation Law, NiSource Finance has insurance which insures directors
and officers for acts committed as such directors or officers.


ITEM 16. EXHIBITS.

     Reference is made to information in the Exhibit Index filed as a part of
this Registration Statement.

ITEM 17. UNDERTAKINGS.

     Each undersigned registrant hereby undertakes:

          (1) To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement:

             (i) To include any prospectus required by Section 10(a)(3) of the
        Securities Act of 1933;

             (ii) To reflect in the prospectus any facts or events arising after
        the effective date of the registration statement (or the most recent
        post-effective amendment thereof) which, individually or in the
        aggregate, represent a fundamental change in the information set forth
        in the registration statement. Notwithstanding the foregoing, any
        increase or decrease in volume of securities offered (if the total
        dollar value of securities offered would not exceed that which was
        registered) and any deviation from the low or high end of the estimated
        maximum offering range may be reflected in the form of prospectus filed
        with the Commission pursuant to Rule 424(b) if, in the aggregate, the
        changes in volume and price represent no more than a 20 percent change
        in the maximum aggregate offering price set forth in the "Calculation of
        Registration Fee" table in the effective registration statement;

                                      II-2
<PAGE>   27

             (iii) To include any material information with respect to the plan
        of distribution not previously disclosed in the registration statement
        or any material change to such information in the registration
        statement;

     Provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if the
     information required to be included in a post-effective amendment by those
     paragraphs is contained in periodic reports filed with or furnished to the
     Commission by the registrant pursuant to Section 13 or 15(d) of the
     Securities Exchange Act of 1934 that are incorporated by reference in the
     registration statement.

          (2) That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment will be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at that time will be deemed to
     be the initial bona fide offering thereof.

          (3) To remove from registration by means of a post-effective amendment
     any of the securities being registered which remain unsold at the
     termination of the offering.

     Each undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of
NiSource Inc.'s annual report pursuant to Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 that is incorporated by reference in the
registration statement will be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time will be deemed to be the initial bona fide offering thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrants pursuant to the foregoing provisions, or otherwise, each registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by such registrant of expenses incurred
or paid by a director, officer or controlling person of such registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, such registrant will, unless in the opinion of its counsel the
matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Act and will be governed by the final
adjudication of such issue.

     Each undersigned registrant hereby undertakes to file an application for
the purpose of determining the eligibility of the trustee to act under
subsection (a) of Section 310 of the Trust Indenture Act of 1939 in accordance
with the rules and regulations prescribed by the Commission under Section
305(b)(2) of the Trust Indenture Act of 1939.

                                      II-3
<PAGE>   28

                                   SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Amendment No. 1 to
the Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the Town of Merrillville, State of Indiana, on
November 17, 2000.


                                            NISOURCE INC.
                                            (Registrant)

                                            By:     /s/ STEPHEN P. ADIK
                                              ----------------------------------
                                                       Stephen P. Adik
                                                        Vice Chairman


     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.



<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                    DATE
                      ---------                                   -----                    ----
<C>                                                     <S>                          <C>

                          *                             Chairman, President and      November 17, 2000
-----------------------------------------------------     Chief Executive Officer
                    Gary L. Neale                         and Director (Principal
                                                          Executive Officer)

                 /s/ STEPHEN P. ADIK                    Vice Chairman and Director   November 17, 2000
-----------------------------------------------------
                   Stephen P. Adik

                          *                             Executive Vice President     November 17, 2000
-----------------------------------------------------     and Chief Financial
                  Michael O'Donnell                       Officer (Principal
                                                          Financial Officer)

                          *                             Vice President and           November 17, 2000
-----------------------------------------------------     Controller (Principal
                 Jeffrey W. Grossman                      Accounting Officer)

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                  Steven C. Beering

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   Arthur J. Decio

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   James T. Morris

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                  Dennis E. Foster
</TABLE>


                                      II-4
<PAGE>   29


<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                    DATE
                      ---------                                   -----                    ----
<C>                                                     <S>                          <C>

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   Ian M. Rolland

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                  John W. Thompson

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   Robert J. Welsh

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   Carolyn Y. Woo

                          *                             Director                     November 17, 2000
-----------------------------------------------------
                   Roger A. Young

              *By: /s/ STEPHEN P. ADIK
  ------------------------------------------------
                   Stephen P. Adik
                  Attorney-in-fact
</TABLE>


                                      II-5
<PAGE>   30

                                   SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this Amendment No. 1 to
the Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the Town of Merrillville, State of Indiana, on
November 17, 2000.


                                            NISOURCE FINANCE CORP.
                                            (Registrant)


                                            By:     /s/ STEPHEN P. ADIK

                                              ----------------------------------

                                                       Stephen P. Adik


                                                        Vice President



     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.



<TABLE>
<CAPTION>
                     SIGNATURE                                   TITLE                     DATE
                     ---------                                   -----                     ----
<C>                                                  <S>                             <C>

                         *                           Chairman, President and         November 17, 2000
---------------------------------------------------    Director (Principal
                   Gary L. Neale                       Executive Officer)

                /s/ STEPHEN P. ADIK                  Vice President and Director     November 17, 2000
---------------------------------------------------    (Principal Financial Officer
                  Stephen P. Adik                      and Principal Accounting
                                                       Officer)

             *By: /s/ STEPHEN P. ADIK
  ----------------------------------------------
                  Stephen P. Adik
                 Attorney-in-fact
</TABLE>


                                      II-6
<PAGE>   31

                                 EXHIBIT INDEX

     The following documents are filed as part of the Registration Statement or
are incorporated by reference.


<TABLE>
<CAPTION>
EXHIBIT
NUMBER                        DOCUMENT DESCRIPTION
-------                       --------------------
<S>       <C>
 1.1*     -- Form of Underwriting Agreement
 3.1      -- Amended and Restated Certificate of Incorporation of
             NiSource Inc. (incorporated by reference to Exhibit 3.1
             to the NiSource Inc. Current Report on Form 8-K filed
             November 1, 2000)
 3.2      -- Amended and Restated Bylaws of NiSource Inc.
             (incorporated by reference to Exhibit 3.4 to the NiSource
             Inc. Current Report on Form 8-K filed November 1, 2000)
 4.1      -- Indenture, dated November 14, 2000, among NiSource
             Finance Corp., NiSource Inc., as guarantor, and The Chase
             Manhattan Bank, as Trustee
 4.2      -- Rights Agreement between NiSource Inc. and ChaseMellon
             Shareholder Services, L.L.C., as rights agent, dated
             November 1, 2000 (incorporated by reference to Exhibit
             4.1 to the NiSource Inc. Current Report on Form 8-K filed
             November 1, 2000)
 5.1      -- Opinion of Schiff Hardin & Waite
12.1      -- Statement Regarding Computation of Ratios of Earnings to
             Fixed Charges
23.1      -- Consent of Arthur Andersen LLP with respect to NiSource
             Inc.
23.2      -- Consent of Arthur Andersen LLP with respect to Columbia
             Energy Group.
23.3      -- Consent of Schiff Hardin & Waite (included in Exhibit
             5.1).
24.1**    -- Powers of Attorney
25.1**    -- Form T-1 Statement of Eligibility and Qualification under
             the Trust Indenture Act of 1939 of Trustee for the
             Indenture with respect to Debt Securities.
25.2**    -- Form T-1 Statement of Eligibility and Qualification under
             the Trust Indenture Act of 1939 of Trustee for the
             Indenture with respect to Guarantees of Debt Securities.
</TABLE>


---------------


* To be incorporated by reference from reports filed under the Securities
  Exchange Act of 1934.



** Previously filed.



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