COLUMBIA ENERGY GROUP
SC 14D1/A, 1999-07-30
NATURAL GAS TRANSMISISON & DISTRIBUTION
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   ====================================================================

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


                              SCHEDULE 14D-1/A
                             (Amendment No. 13)

            TENDER OFFER STATEMENT PURSUANT TO SECTION 14(d)(1)
                   OF THE SECURITIES EXCHANGE ACT OF 1934

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

                            COLUMBIA ENERGY GROUP
                          (Name of Subject Company)

                            CEG ACQUISITION CORP.
                                NISOURCE INC.
                                  (Bidders)

                        COMMON STOCK, $.01 PER SHARE
                       (Title of Class of Securities)

                                  197648108
                    (CUSIP Number of Class of Securities)

                               Stephen P. Adik
                      Senior Executive Vice President,
                    Chief Financial Officer And Treasurer
                                NiSource Inc.
                            801 East 86th Avenue
                      Merrillville, Indiana  46410-6272
                               (219) 853-5200
     (Name, Address and Telephone Number of Person Authorized to Receive
              Notices and Communications on Behalf of Bidder)

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

                                 Copies to:

             Peter V. Fazio, Jr., Esq.           Alan G. Schwartz, Esq.
               Schiff Hardin & Waite           Simpson Thacher & Bartlett
                 6600 Sears Tower                 425 Lexington Avenue
             Chicago, Illinois  60606           New York, New York  10017
            Telephone:  (312) 258-5500         Telephone:  (212) 455-2000


   ====================================================================





        This Amendment No. 13 (this "Amendment") amends and supplements
   the Tender Offer Statement on Schedule 14D-1, as amended, originally
   filed with the Securities and Exchange Commission on June 25, 1999
   (the "Schedule 14D-1") by CEG Acquisition Corp., a Delaware
   corporation (the "Offeror") and a wholly owned subsidiary of NiSource
   Inc., an Indiana corporation ("Parent"). The Schedule 14D-1 and this
   Amendment relate to a tender offer by the Offeror to purchase all of
   the outstanding shares of common stock, par value $.01 per share (the
   "Shares"), of Columbia Energy Group, a Delaware corporation (the
   "Company"), at a purchase price of $68 per Share, net to the seller in
   cash, without interest thereon, upon the terms and subject to the
   conditions set forth in the Offer to Purchase, dated June 25, 1999
   (the "Offer to Purchase"), and in the related Letter of Transmittal
   (which, as either may be amended or supplemented from time to time,
   collectively constitute the "Offer"), copies of which are filed with
   the Schedule 14D-1 as Exhibits (a)(1) and (a)(2), respectively.





   Item 10.  Additional Information.

        On July 30, 1999, Parent issued i) the information available via
   the Internet at http://www.yes2nisource.com and ii) a press release
   regarding the release of information via the Internet at
   http://www.yes2nisource.com, which are included herein as Exhibits
   (a)(22) and (23), respectively, and incorporated herein by reference.

   Item 11.  Material to be Filed as Exhibits.

        (a)(1)         Offer to Purchase, dated June 25, 1999.*

        (a)(2)         Letter of Transmittal.*

        (a)(3)         Letter dated June 25, 1999, from Dealer Manager to
                       brokers, dealers, commercial banks, trust
                       companies and other nominees.*

        (a)(4)         Letter dated June 25, 1999, to be sent by brokers,
                       dealers, commercial banks, trust companies and
                       other nominees to their clients.*

        (a)(5)         Notice of Guaranteed Delivery.*

        (a)(6)         Guidelines for Certification of Taxpayer
                       Identification Number on Substitute Form W-9.*

        (a)(7)         Form of Summary Advertisement, dated June 25,
                       1999.*

        (a)(8)         Press Release issued by Parent on June 24, 1999.*

        (a)(9)         Form of letter dated June 28, 1999 from Gary L.
                       Neale, Chairman, President and Chief Executive
                       Officer of Parent, to investors of the Company.*

        (a)(10)        Press Release issued by Parent on June 28, 1999.*

        (a)(11)        "NiSource/Columbia StraightTalk" communication to
                       stockholders of the Company issued by Parent on
                       July 2, 1999.*

        (a)(12)        Form of letter dated July 2, 1999, from Gary L.
                       Neale, Chairman, President and Chief Executive
                       Officer of Parent, to directors of the Company.*

        (a)(13)        Press Release issued by Parent on July 6, 1999.*

        (a)(14)        Form of letter dated July 12, 1999, from Gary L.
                       Neale, Chairman, President and Chief Executive
                       Officer of Parent, to shareholders of Parent.*





        (a)(15)        "NiSource/Columbia StraightTalk" communication to
                       stockholders of the Company issued by Parent on
                       July 14, 1999.*

        (a)(16)        Press Release issued by Parent on July 14, 1999.*

        (a)(17)        Press Release issued by Parent on July 19, 1999.*

        (a)(18)        Press Release issued by Parent on July 20, 1999.*

        (a)(19)        Form of letter dated July 21, 1999, from Gary L.
                       Neale, Chairman, President and Chief Executive
                       Officer of Parent, to directors of the Company.*

        (a)(20)        Form of letter dated July 26, 1999, from Gary L.
                       Neale, Chairman, President and Chief Executive
                       Officer of Parent, to stockholders of the
                       Company.*

        (a)(21)        "NiSource/Columbia StraightTalk" communication to
                       stockholders of the Company issued by Parent on
                       July 26, 1999.*

        (a)(22)        Information published by Parent on July 30, 1999,
                       available via the Internet at
                       http://www.yes2nisource.com.

        (a)(23)        Press Release issued by Parent on July 30, 1999.

        (b)(1)         Commitment Letter dated June 23, 1999 to Parent
                       from Credit Suisse First  Boston and Barclays Bank
                       PLC.*

        (c)            Not Applicable.

        (d)            Not Applicable.

        (e)            Not Applicable.

        (f)            Not Applicable.

        (g)(1)         Complaint in NiSource Inc. and CEG Acquisition
                       Corp. vs. Columbia Energy Group et al., Delaware
                       Chancery Court, New Castle County.*

        (g)(2)         Complaint in NiSource Inc. and CEG Acquisition
                       Corp. vs. Columbia Energy Group et al., United
                       States District Court, District of Delaware.*

        (g)(3)         First Amended Complaint in NiSource Inc. and CEG
                       Acquisition Corp. vs. Columbia Energy Group et
                       al., United States District Court, District of
                       Delaware.*





        (g)(4)         Complaint in NiSource Inc., NiSource Capital
                       Markets Inc. and CEG Acquisition Corp. vs.
                       Columbia Energy Group et al., Delaware Chancery
                       Court, New Castle County.*

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

        *Previously filed.





                                  SIGNATURE

        After due inquiry and to the best of its knowledge and belief,
   each of the undersigned certifies that the information set forth in
   this statement is true, complete and correct.

                                      CEG ACQUISITION CORP.


                                      By:  /s/ Gary L. Neale
                                           ------------------------
                                           Name: Gary L. Neale
                                           Title: President

                                      NISOURCE INC.


                                      By:  /s/ Gary L. Neale
                                           ------------------------
                                           Name: Gary L. Neale
                                           Title: Chief Executive Officer

   Date: July 30, 1999





                                EXHIBIT INDEX

        Exhibit
        Number    Description
        -------   -----------
        11(a)(1)  Offer to Purchase, dated June 25, 1999.*

        11(a)(2)  Letter of Transmittal.*

        11(a)(3)  Letter dated June 25, 1999, from Credit Suisse First
                  Boston Corporation to brokers, dealers, commercial
                  banks, trust companies and other nominees.*

        11(a)(4)  Letter dated June 25, 1999, to be sent by brokers,
                  dealers, commercial banks, trust companies and other
                  nominees to their clients.*

        11(a)(5)  Notice of Guaranteed Delivery.*

        11(a)(6)  Guidelines for Certification of Taxpayer Identification
                  Number on Substitute Form W-9.*

        11(a)(7)  Form of Summary Advertisement, dated June 25, 1999.*

        11(a)(8)  Press Release issued by Parent on June 24, 1999.*

        11(a)(9)  Form of letter dated June 28, 1999 from Gary L. Neale,
                  Chairman, President and Chief Executive Officer of
                  Parent, to investors of the Company.*

        11(a)(10) Press Release issued by Parent on June 28, 1999.*

        11(a)(11) "NiSource/Columbia StraightTalk" communication to
                  stockholders of the Company issued by Parent on July 2,
                  1999.*

        11(a)(12) Form of letter dated July 2, 1999, from Gary L. Neale,
                  Chairman, President and Chief Executive Officer of
                  Parent, to directors of the Company.*

        11(a)(13) Press Release issued by Parent on July 6, 1999.*

        11(a)(14) Form of letter dated July 12, 1999, from Gary L. Neale,
                  Chairman, President and Chief Executive Officer of
                  Parent, to shareholders of Parent.*

        11(a)(15) "NiSource/Columbia StraightTalk" communication to
                  stockholders of the Company issued by Parent on
                  July 14, 1999.*

        11(a)(16) Press Release issued by Parent on July 14, 1999.*

        11(a)(17) Press Release issued by Parent on July 19, 1999.*





        11(a)(18) Press Release issued by Parent on July 20, 1999.*

        11(a)(19) Form of letter dated July 21, 1999, from Gary L. Neale,
                  Chairman, President and Chief Executive Officer of
                  Parent, to directors of the Company.*

        11(a)(20) Form of letter dated July 26, 1999, from Gary L. Neale,
                  Chairman, President and Chief Executive Officer of
                  Parent, to stockholders of the Company.*

        11(a)(21) "NiSource/Columbia StraightTalk" communication to
                  stockholders of the Company issued by Parent on July
                  26, 1999.*

        11(a)(22) Information published by Parent on July 30, 1999,
                  available via the Internet at http://www.yes2nisource.com.

        11(a)(23) Press Release issued by Parent on July 30, 1999.

        11(b)(1)  Commitment Letter dated June 23, 1999 to Parent from
                  Credit Suisse First Boston and Barclays Bank PLC.*

        11(g)(1)  Complaint in NiSource Inc. and CEG Acquisition Corp.
                  vs. Columbia Energy Group et al., Delaware Chancery
                  Court, New Castle County.*

        11(g)(2)  Complaint in NiSource Inc. and CEG Acquisition Corp.
                  vs. Columbia Energy Group et al., United States
                  District Court, District of Delaware.*

        11(g)(3)  First Amended Complaint in NiSource Inc. and CEG
                  Acquisition Corp. vs. Columbia Energy Group et al.,
                  United States District Court, District of Delaware.*

        11(g)(4)  Complaint in NiSource Inc., NiSource Capital Markets
                  Inc. and CEG Acquisition Corp. vs. Columbia Energy
                  Group et al., Delaware Chancery Court, New Castle
                  County.*

   _________________

        *Previously filed.










                                                     EXHIBIT 11(a)(22)
                                                     -----------------

    [Information published by Parent on July 30, 1999, available via the
                   Internet at http://www.yes2nisource.com]


   NISOURCE

   Delivering life's essential resources

   Get the latest news:

   ********************************************************************

   Merrillville, Ind., July 20, 1999 - NiSource Inc. (NYSE: NI) today
   announced that with regard to its tender offer of Columbia Energy
   Group it has filed the necessary information under the Hart-Scott-
   Rodino (HSR) Antitrust Improvements Act of 1976 with the Federal Trade
   Commission and Department of Justice.

   Gary Neale, NiSource Chairman, President and Chief Executive Officer
   said "This sends a serious message to Columbia that we are confident
   in our ability to secure the necessary regulatory approvals.  We have
   said throughout that we believe the regulatory approval process can be
   completed within six to nine months if we work together.  HSR
   clearance is an important first step, and one that confirms our
   commitment to move forward on all fronts of this transaction."

   ***********************************

   For information about tendering your shares, call Innisfree M&A at
   877-750-5837

   ************************************

   NiSource is a holding company with a market capitalization of
   approximately $3.6 billion whose primary business is the distribution
   of electricity, natural gas and water in the Midwest and Northeast
   United States.  The company also markets utility services and customer
   focused resource solutions along a corridor stretching from Texas to
   Maine.

   For more information on NiSource and its subsidiaries, visit
   www.nisource.com.

   ******************************************************************

                                           [NiSource logo and regional map of
                                           the United States depicting states
                                           which NiSource serves]

                             Say Yes To NiSource

                 FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                     CALL INNISFREE M&A AT 877-750-5837.

                              WWW.NISOURCE.COM

   The information appearing on this Web site is neither an offer to
   purchase nor a solicitation of an offer to sell shares of common stock
   of Columbia Energy Group.  Such offer is made solely by the Offer to
   Purchase, dated June 25, 1999, as amended, and the related Letter of
   Transmittal.  It is not being made to, and tenders will not be
   accepted from, holders of shares of Columbia common stock in any
   jurisdiction in which making or accepting such offer would not comply
   with law.  In any jurisdiction where a licensed broker or dealer must
   make such offer, it shall be deemed made on behalf of NiSource Inc. by
   Credit Suisse First Boston or other registered brokers or dealers
   licensed in such jurisdiction.  The offer may be extended beyond its
   August 6, 1999 expiration date.  Any extension will be publicly
   announced no later than 9:00 a.m., New York City time, on the next
   business day.  This Web site does not constitute a solicitation of
   proxies from Columbia Energy Group's stockholders.  Any such
   solicitation will be made only by separate proxy materials in
   compliance with Section 14(a) of the Securities Exchange Act.

   This Web site is covered by the TERMS AND CONDITIONS located at
   NiSource's Web site at WWW.NISOURCE.COM.




                                           [NiSource logo and regional map of
                                           the United States depicting states
                                           which NiSource serves]

   ABOUT THE TENDER OFFER

   WE ARE OFFERING $68 PER SHARE IN CASH FOR ALL SHARES OF COLUMBIA
   ENERGY GROUP.  WE ARE ASKING THAT COLUMBIA SHAREHOLDERS TENDER THEIR
   SHARES IMMEDIATELY TO SEND A MESSAGE TO COLUMBIA'S MANAGEMENT AND
   BOARD THAT "NEGOTIATIONS WITH NISOURCE IS IN THEIR STAKEHOLDERS' BEST
   INTEREST."

        *    Offer of $68 cash per share represents a 30.7 percent
             premium over Columbia's average closing share price for the
             20 trading days prior to June 4, 1999 (the last trading day
             before NiSource's June 7 announcement of its proposal).

        *    The financing for this transaction is firm and in place.

        *    We are willing and able to make a higher offer if Columbia
             is willing to cooperate with us and negotiate a definitive
             merger agreement.

        *    To tender their shares, investors should contact Innisfree
             M&A at 877-750-5837.

   WE BELIEVE OUR TENDER OFFER WILL BE SUCCESSFUL BECAUSE:

        *    Over 80 percent of Columbia stock is owned by institutions.
             We believe our offer is a full and fair value, and we
             believe that, as sophisticated investors, they will see it
             the same way.

        *    There is no market overlap between the utility operations of
             the two companies.  Thus, regulatory risk is limited.

        *    We have met with the holders of over 50 percent of
             Columbia's stock, and they want their company to negotiate
             with us.  We are confident that these same investors will
             take the appropriate actions to ensure that Columbia's board
             is fully aware of their position in this matter.

   THE LAWSUITS ARE A PART OF OUR OVERALL STRATEGY TO COMPEL COLUMBIA TO
   LISTEN TO THEIR SHAREHOLDERS.

        *    We believe that Columbia's board deprived their shareholders
             of the right to fill the 13th board position.  Columbia's
             certificate of incorporation and by-laws mandate that
             Columbia have 13 members on their board divided into three
             classes with each serving three years.

        *    We intend to nominate an independent shareholder
             representative, with no affiliation to NiSource, to fill the
             final seat.





   TO REITERATE, THIS COMBINATION IS IN THE BEST INTERESTS OF THE
   SHAREHOLDERS OF BOTH COMPANIES.

        *    Our proposal is:

             *    an offer at a fair value.
             *    accretive in first 12 months without reliance on
                  operating synergies.
             *    strategically compelling.
             *    subject to little regulatory risk.
             *    ratings neutral.
        *    NiSource has consistently demonstrated its capabilities in
             multiple sectors: electricity, gas and water.
        *    No strings attached to offer - customary conditions in a
             merger agreement. NiSource would like to close a negotiated
             transaction within six to nine months, assuming customary
             regulatory approval process.
        *    Creates powerful "Super-Regional" energy company with a
             unique portfolio.
        *    Deal will enhance future growth:  NiSource-Columbia will be
             a nimble player in the energy sector with an estimated 12
             percent EPS growth per year.

   FOR INFORMATION ABOUT TENDERING YOUR SHARES, CALL INNISFREE M&A AT
   877-750-5837.

                              WWW.NISOURCE.COM




                                           [NiSource logo and regional map of
                                           the United States depicting states
                                           which NiSource serves]


                       Frequently Asked Questions

   WHO IS NISOURCE?

   NiSource is a holding company with a market capitalization of
   approximately $3.6 billion whose primary business is the distribution
   of electricity, natural gas and water in the Midwest and Northeast
   United States. The company also markets utility services and
   customer-focused resource solutions along a corridor stretching from
   Texas to Maine.

   WHY IS NISOURCE PURSUING COLUMBIA ENERGY GROUP?

   This acquisition is in line with NiSource's stated strategy of growing
   a gas distribution corridor between Chicago and New England.

   *It delivers on NiSource's well-defined strategy to create a
   distribution value chain around its gas, electric and water
   businesses.

   *It brings new products and services to customers.

   *The combination will make NiSource one of the largest natural gas
   companies in the country.

   *Its pipelines will connect the Texas Gulf to the Atlantic coast.

   *NiSource will have the largest natural gas storage capacity in the
   U.S.

   WHAT IS THE OFFER THAT NISOURCE HAS MADE TO COLUMBIA ENERGY GROUP?

   NiSource announced June 7, 1999 that it is offering to acquire
   Columbia Energy Group for $5.7 billion, or $68 per share in cash. The
   offer is not subject to any financing contingency. The price
   represents a 30.7 percent premium over the average closing share price
   for Columbia common stock for the 20 trading days ended Friday, June
   4, 1999.

   HAD NISOURCE PREVIOUSLY MADE A FORMAL OFFER TO COLUMBIA?

   Yes.  NiSource Chairman, President and Chief Executive Officer Gary L.
   Neale said, "We're announcing this offer after a formal offer to the
   Columbia Board of Directors was rejected, repeated requests for
   discussion were ignored and Columbia's financial advisors informed us
   on May 28 that the company was unwilling to talk with us. We believe
   that all constituencies will find this offer to be so compelling that
   Columbia's Board will no longer be able to ignore it."





   HOW LONG WILL THIS ACQUISITION TAKE TO COMPLETE?

   Pending approval from Columbia's shareholders and federal and state
   regulators, we expect the acquisition to be completed within six to
   nine months after execution of a merger agreement.

   WHAT PLANS DOES NISOURCE HAVE FOR MERGING THE TWO COMPANIES?

   Just as with previous acquisitions, NiSource expects there to be few
   operational changes for Columbia. One clear advantage of this proposed
   merger is that there is no overlap in service areas. NiSource and
   Columbia are not direct competitors in any utility markets.

   HISTORY HAS PROVEN THAT HOSTILE BIDS AREN'T SUCCESSFUL IN REGULATED
   INDUSTRIES.  WHY IS YOUR SITUATION ANY DIFFERENT?

   Two reasons:

   *Columbia is 82 percent institutionally held. We have spoken to
   Columbia's largest shareholders, and they favor this offer, which is a
   substantial premium to Columbia share price prior to our public
   announcement on June 7.

   *There is no market overlap between the utility operations of the two
   companies.   Thus, redundancies are very modest. For this reason and
   others, we feel there is limited regulatory risk.

   WHAT IS THE REASON FOR THE PROPOSED TENDER?

   Despite our many attempts, Columbia's management has thus far been
   unwilling to negotiate with us. We've received enough support from
   Columbia's shareholders that we feel a tender offer for their shares
   can be completed successfully.

   We would also like to add that we have the ability to offer a higher
   price.  However,  Columbia's management must sit down at the
   negotiating table to obtain a higher price.

   WHAT ARE THE TERMS OF THE TRANSACTION?

   NiSource will offer to acquire all of the outstanding shares of common
   stock of Columbia for $68 per share in cash.

   WHEN DID THE OFFER COMMENCE?


   June 25, 1999






   WHAT WILL YOU DO IF SHAREHOLDERS DON'T TENDER?

   We will review our options and make a decision at that time. However,
   let me reiterate that we are committed to this transaction. We firmly
   believe that this transaction is in the best interest of both
   companies' shareholders. We're not going away.

   IS THE PRICE OFFERED FAIR?

   We believe this is a compelling offer to Columbia's shareholders that
   represents a substantial premium over Columbia's current and
   historical share price.

   ARE YOU WILLING TO OFFER A HIGHER PRICE?

   We have the financing in place to offer a higher price. However,
   Columbia's management must sit down at the negotiating table to obtain
   a higher price.

   WHY A CASH TRANSACTION? WHY NOT STOCK?

   We believe that our all-cash merger proposal, which reflects a
   substantial premium over Columbia's current market value, represents a
   full and fair price for Columbia stockholders. However, if the
   Columbia Board and management believe that it would be in their
   stockholders' best interest to receive NiSource stock in exchange for
   these shares, we would be willing to consider a transaction that
   contemplates offering a certain amount of NiSource stock. This would
   mean, however, that we would need to negotiate a merger with Columbia,
   something we have been prepared to do throughout this process.

   DOES THIS TRANSACTION REQUIRE NISOURCE STOCKHOLDER APPROVAL?

   No.

   YOU COMMENCED LITIGATION AGAINST THE COLUMBIA BOARD JUNE 24. WHY?

   Despite the fact that Columbia's board was aware that it had to elect
   five directors at this year's annual meeting, they only filled four
   seats, which is in violation of their own certificate of
   incorporation. In view of the entrenched attitude Columbia's board has
   shown to date, we filed a complaint to give shareholders the right to
   choose the fifth director.

   YOU COMMENCED FEDERAL LITIGATION AGAINST COLUMBIA JUNE 24. WHY?

   This lawsuit seeks to prohibit Columbia from making false and
   misleading statements about our tender offer.

   WHY IS THIS DEAL IN THE BEST INTEREST OF NISOURCE'S SHAREHOLDERS?

   *Stronger company - we project 12 percent EPS growth per year


   *Strategically compelling - fits our long-stated goal of building a
   gas corridor





   *Transaction is accretive in the first year

   WHY IS THIS DEAL IN THE BEST INTEREST OF COLUMBIA'S SHAREHOLDERS?

   *Realize immediate value and significant premium over Columbia share
   price

   *Uncertainty of achieving the offer price on a stand-alone basis

   *Stronger combined company

   WHAT PROMISES ARE YOU PREPARED TO MAKE TO COLUMBIA SHAREHOLDERS?
   EMPLOYEES? LOCAL COMMUNITIES?

   *Columbia shareholders would receive a significant premium for their
   shares.

   *Overall, we anticipate that Columbia employees should see enhanced
   career opportunities from being part of a larger organization.

   *Together, we anticipate that NiSource and Columbia would continue to
   be vital parts of their communities by providing jobs, economic
   development assistance and civic and charitable support.

   WHO ARE YOUR LARGEST SHAREHOLDERS?  WHAT HAS BEEN THEIR REACTION?

   They are Massachusetts Financial, Merrill Lynch, and Duff and Phelps.
   We have spoke to all of our largest shareholders, and they firmly
   support this transaction.

   WHAT HAS BEEN THE REACTION OF COLUMBIA'S LARGEST SHAREHOLDERS?  HAVE
   YOU SPOKEN WITH THEM?

   We've met with holders of more than 50 percent of their stock.  They
   are in favor of Columbia meeting with us to discuss our offer.

   DOES COLUMBIA HAVE ANY TAKEOVER DEFENSES IN PLACE?

   Columbia has many of the standard takeover defenses in place, such as
   a staggered board.

   DO THEY HAVE A POISON PILL?

   No, and it is our hope that they will act responsibly and not take
   actions which would further entrench Columbia management.

   DO THEY HAVE A STAGGERED BOARD?

   Yes.

   DO COLUMBIA EXECUTIVES HAVE GOLDEN PARACHUTE AGREEMENTS?

   Yes, that information is disclosed in their publicly filed documents,
   and they were enhanced for the company's top three officers and





   expanded to 27 others July 14.

   ARE THERE ANY PENSION ISSUES INVOLVED?

   No.

   ARE YOU CONCERNED ABOUT A POSSIBLE INTERLOPER BREAKING UP THE
   TRANSACTION?

   We are not in a position to speculate. Again, we believe that our
   offer represents an opportunity for the stockholders of both Columbia
   and NiSource to realize significant value for their respective
   investment.

   IF A THIRD PARTY MAKES A COUNTEROFFER, HOW DO YOU THINK COLUMBIA WILL
   REACT?

   We are not in a position to speculate; however, we believe that we are
   making a generous offer and that there are compelling strategic
   reasons for a combination of our companies. We also believe that the
   appropriate regulatory bodies will agree with us and that others will
   recognize these factors as well.

   IF COLUMBIA'S BOARD REJECTS YOUR INITIAL OFFER, OR A THIRD PARTY
   ENTERS WITH A HIGHER BID, WOULD YOU BE WILLING TO INCREASE YOUR OFFER?
   IF SO, BY HOW MUCH?

   We will not speculate. We believe that our offer is full and fair and
   our combination would make more sense to shareholders and regulators
   than other potential combinations.

   WHEN DO YOU EXPECT THE TRANSACTION TO CLOSE?

   The company anticipates that the transaction will close within 6-9
   months after execution of a merger agreement.

   HOW WILL THIS IMPACT NISOURCE'S EARNINGS FOR THE QUARTER AND THE YEAR?
   COLUMBIA'S?

   The transaction is accretive in the first full year.

   WHEN DO YOU ANTICIPATE FILING YOUR APPLICATION WITH THE FERC?

   We will be filing promptly.

   HOW WILL THE FERC REACT?

   We expect the FERC to support the transaction as it promotes increased
   competition and will lead to lower rates for customers.

   WHAT OTHER REGULATORY APPROVALS DO YOU NEED? WHAT HAVE THE REGULATORS
   SAID SO FAR?

   The transaction requires approval of the state regulators in





   Columbia's service area.  Our conversations with these regulators have
   been both constructive and encouraging.

   WILL THERE BE A RATE HIKE?

   No.

   WHO WILL RUN THE COMPANY?

   Gary Neale will become the CEO of the combined company. However, until
   we sit down and talk with Columbia, it is premature to discuss the
   balance of the combined company's senior management.

   WHAT ABOUT COLUMBIA'S BOARD MEMBERS? WILL ANY OF THEM BE INVITED TO
   JOIN NISOURCE'S BOARD?

   Until we sit down and talk with Columbia, it is premature to discuss
   the combined company's leadership. We would, however, like to approach
   this as a true merger and retain the best of both companies.

   HOW DO THE CULTURES OF THE TWO COMPANIES COMPARE? ARE THERE ANY
   DIFFERENCES?  IF SO CAN THIS BE AN IMPEDIMENT?

   We are confident that we can combine the two companies operationally,
   economically and culturally. We would not seek this combination if we
   believed there were any significant impediments to a complete and
   successful merger.

   HOW DOES NISOURCE STAND ON ENVIRONMENTAL COMPLIANCE? HOW ABOUT
   COLUMBIA?

   We are proud of our reputation as an environmentally conscientious
   company and, consistent with our history, we are committed to running
   the Columbia operations in an environmentally responsible manner.


               FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                   CALL INNISFREE M&A AT 877-750-5837.

                              WWW.NISOURCE.COM



                                           [NiSource logo and regional map of
                                           the United States depicting states
                                           which NiSource serves]


   RELATED PRESS RELEASES

   JULY 1999

        *    NISOURCE SEEKS HART-SCOTT-RODINO CLEARANCE FOR COLUMBIA
             ENERGY BID (7-20-99)

        *    NISOURCE ASKS COLUMBIA CEO TO CORRECT MISLEADING STATEMENTS
             (7-19-99)

        *    NISOURCE/COLUMBIA STRAIGHTTALK (7-14-99)

        *    WASSERSTEIN PERELLA JOINS TEAM OF NISOURCE ADVISORS (7-14-
             99)

        *    NISOURCE TO PURSUE ITS TENDER OFFER FOR COLUMBIA ENERGY (7-
             6-99)

        *    NISOURCE/COLUMBIA STRAIGHTTALK (7-2-99)

   JUNE 1999

        *    DELAWARE CHANCERY COURT ORDERS AN ACCELERATED SCHEDULE IN
             NISOURCE LAWSUIT (6-28-99)

        *    NISOURCE TO COMMENCE TENDER OFFER FOR COLUMBIA ENERGY GROUP
             (6-24-99)

        *    NISOURCE TO PURSUE TRANSACTION FOR COLUMBIA ENERGY GROUP (6-
             10-99)

        *    SHAREHOLDERS WANT COLUMBIA TO NEGOTIATE WITH NISOURCE (6-9-
             99)

        *    NISOURCE INC. OFFERS $68 PER SHARE FOR COLUMBIA ENERGY GROUP
             (6-7-99)


                    FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                        CALL INNISFREE M&A AT 877-750-5837.

                              WWW.NISOURCE.COM




                                           [NiSource logo and regional map of
                                           the United States depicting states
                                           which NiSource serves]



   NISOURCE-COLUMBIA COMPARISON

   CREATES A SUPER REGIONAL POWERHOUSE

   $ IN MILLIONS

   NISOURCE                           COLUMBIA
   ---------------------------        -------------------------------

   MARKET              $3,571         MARKET              $4,665
     CAPITALIZATION:                    CAPITALIZATION:

   ENTERPRISE VALUE:*  $6,390         ENTERPRISE VALUE:   $6,915<F1>

   TOTAL ASSETS:*      $6,370         TOTAL ASSETS:       $7,200


   1998 EBIT:*         $  480         1998 EBIT:          $  515

   1998 NET INCOME:*   $  212         1998 NET INCOME:    $  259



   CUSTOMERS (000'S)                  CUSTOMERS (000'S)

   Electric               421

   Gas                  1,059         Gas                  2,100

   Water                  254
                                      Propane                300


   *    1998 pro forma for Bay State Gas and TPC Corporation.

   <F1> Includes National Propane acquisition debt.


   Comparison as of June 7, 1999.  Columbia numbers are taken from their
   from their filings and public statements.

   Download the ANALYST PRESENTATION regarding the Columbia offer.





                       [Text of Analyst Presentation]

                                  NISOURCE


                         A CATALYST FOR COMPETITION
                  THE ACQUISITION OF COLUMBIA ENERGY GROUP


                                  JUNE 1999



      These materials contain forward-looking statements as defined in
        Section 21E of the Securities Exchange Act of 1934, including
          statements about future business operations and financial
           performance.  These statements involve risks and uncer-
             tainties inherent in business forecasts, and actual
            results could differ materially from those indicated
              in these statements.  A number of these risks and
               uncertainties are discussed in NiSource's Form
                10-Q Quarterly Report filed with the Securi-
                ties and Exchange Commission on May 14, 1999.





                                                                 NISOURCE

   NISOURCE:  A TRACK RECORD OF PERFORMANCE
   ----------------------------------------------------------------------


             TOTAL RETURN                       NET INCOME
      [Graph depicting performance      [Graph depicting NiSource Net]
       of NiSource stock compared to    Income compared to NiSource EPS
      S&P 500 Index for the period      for the period 1990 to 1999.*]
      June 1989 to June 1999.]
                                        *Research estimates for 1999.






        NISOURCE HAS CONSISTENTLY DELIVERED VALUE TO ITS SHAREHOLDERS


                                   *  *  *





                                                                 NISOURCE

   A GREAT TRANSACTION FOR NI SHAREHOLDERS
   ----------------------------------------------------------------------


   *    Immediate cashflow and earnings accretion with little to no
        synergies required

        -    Combined entity is poised to deliver 12+% annual EPS growth
        -    Revenue and cost synergies could result in higher growth

   *    Positions the combined company for profitable growth

        -    Opportunities to leverage capabilities across fuels,
             geography, weather and time

        -    Maintains strong financial profile:  credit ratings are
             likely to be affirmed

   *    Creates a highly competitive energy company from Texas to Maine

        -    Columbia complements NiSource's gas corridor strategy

   *    Builds on management's proven track record of strategic accretive
        acquisitions

   *    Fast track approval process: 6-9 months

        -    Customers will benefit from greater choice and increased
             competition



        ENERGY CORRIDOR STRATEGY  --> ACCRETION  --> EARNINGS GROWTH


                                   *  *  *





                                                                 NISOURCE

   NISOURCE'S STRATEGY:  BUILDING FOR TOMORROW
   ----------------------------------------------------------------------

   *    INCREASED PROFITABILITY FROM SOPHISTICATED ARBITRAGE ACROSS
        FUELS, GEOGRAPHY, WEATHER AND TIME

        -    Procure, deliver, and risk-manage the commodity
        -    Fundamentally alter customer on-site consumption patterns
        -    Provide sophisticated billing and metering service for
             multi-site businesses

   *    CONTINUE TO FOCUS ON ITS CORE STRENGTHS

        -    Gas, Electric and Water Distribution
        -    Gas Storage
        -    Distributed Generation

   *    USE PROVEN SKILLS TO MAXIMIZE SHAREHOLDER VALUE

        -    Quickly implement shared services
             --   $25-30 million from purchasing synergies among Bay
                  State, IWC, and NIPSCO
             --   No personnel layoffs
        -    Achieve above average returns from the regulated business
        -    Enhance base growth rate through non-regulated businesses

                      CONSISTENT FOCUS ON PROFITABILITY

                                   *  *  *





                                                                 NISOURCE

   NI/CG ENERGY CORRIDOR
   ----------------------------------------------------------------------



   Platform for Success                              [Regional map of the
                                                     United States depicting
   *  4,100,000 customers                            states which NiSource
   *  19,000 miles of gas pipelines                  serves]
   *  700 Bcf of gas storage
   *  4,000 MW power generation
   *  800 Bcf proved natural gas reserves




          30% OF U.S. POPULATION AND 40% OF U.S. ENERGY CONSUMPTION


                                   *  *  *




                                                                 NISOURCE


   ARBITRAGE WITHIN THE CORRIDOR
   ----------------------------------------------------------------------


                            [Regional Map of the
                          United States depicting
                       states which NiSource serves]

   Gas flows with the weather [arrow on map]



      CAPITALIZE ON TIME AND WEATHER PATTERNS IN PEAK GAS USAGE PERIODS


                                   *  *  *





                                                                 NISOURCE


   INCREMENTAL REVENUE POTENTIAL
   ----------------------------------------------------------------------


   *    Direct interconnect to move gas from Chicago to New England along
        multiple peak points

   *    Use the combination of pipeline capacity and quick release gas
        storage to arbitrage west to east weather patterns and east to
        west time zones

        -    "Huff & Puff" theory

   *    Similar large industrial customer base provides multiple new
        inside the fence cogen opportunities

        -    Build excess capacity to capitalize on marginal cost
             differential

   *    Focus trading and marketing on existing asset and customer base

        -    Profitability is critical

        -    Capitalize on known reputation and existing cost
             infrastructure




          CREATE ELECTRIC AND GAS CONVERGENCE AT THE CUSTOMER LEVEL


                                   *  *  *





                                                                 NISOURCE


   COMBINATION OF SIMILAR SIZED PEERS
   ----------------------------------------------------------------------

   ($ in Millions)

               NiSource                           Columbia
   -------------------------------    -------------------------------

   Market Capitalization:   $3,571    Market Capitalization:    $4,665
   Enterprise Value:*       $6,390    Enterprise Value:         $6,915(1)
   Total Assets:*           $6,370    Total Assets:             $7,200

   1998 EBIT:*                $480    1998 EBIT:                  $515
   1998 Net Income:*          $212    1998 Net Income:            $259

   Customers (000's)                  Customers (000's)
     Electric:                 421      Gas:                     2,100
     Gas:                    1,059      Propane:                   300
     Water:                    254

   * 1998 pro forma for Bay State     (1)  Includes National Propane
     Gas and TPC Corporation.              acquisition debt


                         A SUPER REGIONAL POWERHOUSE


                                   *  *  *

                                                                 NISOURCE

   The Offer
   ----------------------------------------------------------------------


   *    NiSource has proposed to acquire Columbia for $68 per share in
        cash or $5.7 billion

   *    The offer is not contingent on financing; only customary merger
        conditions

   *    Required regulatory approvals are expected in approximately 6-9
        months

   *    Due to Columbia's unwillingness to discuss a negotiated
        transaction, NiSource is making public its proposal


                FULL AND FAIR VALUE TO COLUMBIA SHAREHOLDERS

                                   *  *  *





                                                                 NISOURCE

   THIS IS A COMPELLING OFFER
   ----------------------------------------------------------------------



                      ONE YEAR STOCK PRICE PERFORMANCE
     [Line Graph depicting performance of Columbia stock compared to S&P
           500 Index for the period June 3, 1998 to June 4, 1990]



                        PERIOD PRIOR TO ANNOUNCEMENT

                       1 Day     1 Week    4 Weeks   3 Months
                       -----     ------    -------   --------

             Premium   22.0%     27.1%      35.3%     28.8%



                   OFFER EXCEEDS ALL TIME HIGH STOCK PRICE


                                   *  *  *





                                                                 NISOURCE

   COMPARABLE TRANSACTION ANALYSIS
   ----------------------------------------------------------------------


   (Dollars in Millions)
  <TABLE>
  <CAPTION>
                                                                                                     Purchase Price     Adjusted
                                                                                                          as a          Purchase
                                                                               Premiums Paid to       Multiple of:        Price
                                                                               Pre-announcement       ------------    -------------
                                                                                    Prices                         LTM
                                                                              ------------------       ---------------------------
    Date                                                                      4         1       1     Earn-
  Announced           Acquiror                        Target                weeks      week    day    ings    Book   EBITDA   EBIT
  ---------           --------                        ------                -----     -----    ---    ----    ----   ------   ----
  <S>         <C>                         <C>                                 <C>       <C>     <C>     <C>     <C>     <C>     <C>
PROPOSED    NISOURCE INC.               COLUMBIA ENERGY GROUP               35.3%     27.1%   22.0%   23.4x   2.7x    10.7x   15.8x
5/10/99     Dominion Resources          Consolidated Natural Gas            27.3%     29.2%   18.4%   22.6x   2.7x    10.3x   16.9x
4/26/99     ONEOK                       Southwest Gas                       32.2%     21.5%   23.1%   19.1x   1.9x    7.5x    11.9x
4/23/99     Energy East                 Connecticut Energy                  65.1%     50.0%   34.1%   23.0x   2.4x    11.1x   16.8x
3/15/99     El Paso Natural Gas         Sonat Inc.                          39.5%     41.9%   18.9%   32.8x   3.0x    9.2x    20.5x
2/22/99     Sempra Energy               KN Energy                           21.6%     28.6%   18.3%   31.3x   1.4x    11.6x   15.0x
12/14/98    National Grid Plc           New England Electric System         26.8%     23.9%   25.0%   26.7x   2.0x    9.7x    13.1x
12/7/98     BEC Energy                  Commonwealth Energy System          16.1%     14.5%   16.6%   18.2x   2.1x    8.2x    12.9x
11/11/98    Carolina Power & Light      North Carolina Natural
                                          Gas Corp.                         47.8%     41.1%   48.1%   20.9x   2.8x    10.1x   13.7x
10/19/98    Eastern Enterprises         Colonial Gas                        26.1%     29.9%   26.8%   21.0x   2.5x    10.3x   14.7x
12/22/97    Eastern Enterprises         Essex County Gas                    61.2%     55.5%   26.6%   21.2x   2.4x    9.5x    13.6x
12/18/97    NIPSCO Industries           Bay State Gas                       39.1%     32.0%   26.5%   22.5x   2.3x    10.3x   15.8x
12/12/96    ONEOK                       Western Resources Inc.                NM        NM     NM     32.5x   1.2x    10.8x   18.4x
11/22/96    TECO Energy                 Lykes Energy                          NA        NA     NA     18.8x   2.8x    7.7x    11.4x
8/12/96     Houston Industries          NorAm Energy                        47.1%     43.8%   37.6%   25.3x   2.6x    8.2x    11.9x
7/22/96     Atmos Energy                United Cities Gas                   69.7%     64.3%   52.2%   24.8x   2.2x    8.6x    13.0x
4/15/96     Texas Utilities             ENSERCH                               NM        NM     NM      NM      NM     6.8x    18.6x
                                                MEAN                        40.0%     36.6%   28.6%   24.0x   2.3x    9.4x    14.9x

                                                                  *  *  *
</TABLE>






                                                                 NISOURCE

   COMPLETED IN 6 --9 MONTHS
   ----------------------------------------------------------------------
<TABLE>
<CAPTION>

      Similar Process and Timing to NiSource/Bay State and Dominion/CNG

                                                                            MONTHS

                           TO*            TO+1          TO+2       TO+3     TO+4        TO+5         TO+6     TO+7    TO+8   TO+9
                           ---            ----          ----       ----     ----        ----         ----     ----    ----   ----
 <S>                      <C>             <C>          <C>         <C>      <C>        <C>          <C>       <C>     <C>     <C>

 Shareholder                                         Mail Proxy                     Shareholder
 Approval                                                                             Approval

 FERC                    Filing                      Commission                                    Approval
                                                       Review

 Hart-Scott              Filing         Approval
 Rodino

 State Filings      File: KY, OH,MD,                                                               Approval
                         PA, VA

 SEC                 1935 Act Filing                 Commission                                    Approval
                                                       Review
</TABLE>
     *Signing of Merger Agreement.


               TIMING CAN BE COMPRESSED BY ACTIVE SHAREHOLDER SUPPORT


                                      *  *  *





                                                                        NISOURCE


   ACQUISITION FINANCING PLAN
   ----------------------------------------------------------------------

           STRUCTURE                         SOURCES & USES
           ---------                         --------------

 [Graphic depicting Acquisition       INITIAL SOURCES                   $MM
    Financing Plan]                                                     ---
                                        364 Day Bank Facility          $5,790
                                      FINAL SOURCES
                                        Debt Financing*                $3,185
                                        Equity and Equity
                                        Linked Financing*               2,605
                                                                       ------
                                      TOTAL FINAL SOURCES              $5,790
                                                                       ======
                                      USES
                                        Purchase Price
                                        ($68.00/share)                 $5,690
                                      Transaction Costs                   100
                                                                       ------
                                      Total Uses                       $5,790
                                                                       ======

                                         *  Within 12 months after
                                            closing.


                        CREDIT RATINGS LIKELY TO BE AFFIRMED


                                      *  *  *





                                                                        NISOURCE


   EPS PRO FORMA IMPACT
   ----------------------------------------------------------------------


    ($mm except per share data)                             2000(1)    2001(1)
    --------------------------------------------            -------    -------
    IBES EST. NI NET INCOME                                    244.3     261.4
    IBES EST. CG NET INCOME                                    152.7     386.4
      NI Incremental Interest Expense (@6.75%)                (121.1)   (160.5)
      Goodwill (net of consolidation adjustments)              (30.2)    (60.3)

    PRO-FORMA NET INCOME                                       245.7     427.0
      Avg. Fully Diluted Pro Forma Shares
        Outstanding (mm)*                                      126.7     196.0

    PRO-FORMA FULLY DILUTED EPS                                  1.94      2.18
      NI STAND-ALONE FULLY DILUTED EPS                           1.93      2.06
      Accretion                                                  0.01      0.12
      Accretion %                                                0.5%      5.8%


   (1)Assumes transaction close on June 30, 2000 and equity issuance at
      end of Q1 2001

   *Stock issued at $28.19 per share and assumes no stock buyback.


                               IMMEDIATELY ACCRETIVE


                                      *  *  *





                                                                        NISOURCE


   HOW WE GOT HERE
   ----------------------------------------------------------------------

   *    On April 1, NiSource made a proposal to merge with Columbia in an all
        cash transaction

        -    At Columbia's request NiSource withdrew its offer to allow
             discussions to proceed on a friendly basis

        -    A meeting was scheduled between the companies for April 16

        -    Columbia cancelled the meeting on April 15 without explanation

   *    On April 16, NiSource sent a formal cash offer to Columbia

   *    Columbia rejected the NiSource offer on April 18 and launched its
        unsolicited bid for Consolidated Natural Gas

   *    NiSource has subsequently attempted, without success, to engage Columbia
        in merger discussions

   *    Because the combination is financially and strategically compelling,
        NiSource believes it is obligated to inform Columbia's shareholders of
        its proposal




                                 IT'S TIME TO TALK


                                      *  *  *





                                                                        NISOURCE


   SEND A MESSAGE TO THE BOARD TO NEGOTIATE
   ----------------------------------------------------------------------


   SHAREHOLDERS

    *   Columbia has consistently underperformed its peer group and the market

    *   Since 1996, approximately $300 million has been invested in unregulated
        businesses without results:  $11.1mm Operating Loss in 1998

    *   Columbia lacks the skill and assets to capitalize on gas and electric
        convergence

   CUSTOMERS

    *   NiSource's cash offer assumes a rate freeze to all Columbia customers

    *   NiSource is an active proponent of competition and customer choice

   EMPLOYEES

    *   NiSource's offer requires minimal synergies to be earnings accretive



                          HELP MAXIMIZE SHAREHOLDER VALUE


                                      *  *  *





                                                                        NISOURCE


   CONCLUSIONS
   ----------------------------------------------------------------------


   -->  Compelling proposal for Columbia Shareholders, Customers and Employees

   -->  Transaction will be immediately earnings and cashflow accretive

   -->  Excellent strategic fit uniting two complementary platforms

   -->  Full Btu provider with direct access to 30% of the US population and 40%
        of US energy consumption

   -->  Builds on NiSource's track record of disciplined accretive acquisitions


                                      *  *  *




                                      NISOURCE

                                  www.nisource.com






                    FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                        CALL INNISFREE M&A AT 877-750-5837.


                                  WWW.NISOURCE.COM



                                           [NiSource logo and regional map
                                            of the United States depicting
                                            states which NiSource serves]

   ABOUT NISOURCE

   NiSource Inc. (NYSE: NI), formerly known as NIPSCO Industries Inc., a
   Fortune 500 company based in Merrillville, Ind., has eight major
   subsidiaries and nearly 7,500 dedicated employees and a market
   capitalization of $3.6 billion. The NiSource family of companies serves
   approximately 1.7 million customers in 23 states along a geographic
   corridor that runs from the company's storage assets in Texas to one of
   its pipelines in Maine.  The region includes the Midwest, where 40% of
   U.S. energy is consumed, and New England, a strategic geographic area for
   growth.

   Along this route, NiSource will explore opportunities for growth in
   increased pipeline service, gas storage, customer acquisition in the gas,
   electric and water distribution business, and strategic partnerships.
   The company is committed to meeting customers' total energy needs by
   focusing on opportunities for convergence in its core businesses and for
   the continued emergence of a fourth business sector, nonregulated
   solutions that deliver the benefits of these commodities.

                 FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                     CALL INNISFREE M&A AT 877-750-5837.

                               WWW.NISOURCE.COM



                                           [NiSource logo and regional map
                                            of the United States depicting
                                            states which NiSource serves]

   MEDIA TOOLS

        PHOTO OF GARY L. NEALE (4 MB zip file, unzip for EPS format)

        NISOURCE{TM} LOGO* (EPS format)

        VIDEO HIGHLIGHTS OF OUR ANNUAL SHAREHOLDERS MEETING, held on April 14,
        1999 at the Century Center in South Bend, IN.

   [Transcript of Video Highlights of Annual Shareholders Meeting]

   Let me begin by congratulating you, our shareholders, for approving the
   name change from NIPSCO Industries to NiSource. We went through an
   extensive process in deciding to change the name of the Company and
   then selecting the new name. This process included conducting focus groups
   with shareholders, customers and members of the financial community, who
   clearly agreed that we needed a name that better reflects the Company's
   growth and new focus.

   We believe that NiSource describes the new direction of your Company as a
   multi-state supplier of energy and water resources and related services.
   In other words, we are delivering life's essential resources to our
   customers - and, in turn, delivering added value to you, our shareholders.

   As stated in our Annual Report, NiSource will maximize our value to
   shareholders by remaining focused on our core competencies of distributing
   electricity, natural gas and water in the Midwest and Northeast United
   States, and marketing utility services and customer-focused resource
   solutions along the corridor pictured here, stretching from Texas to
   Maine. I will elaborate on this focused growth strategy after reviewing
   with you our financial highlights of 1998.

   What does all this mean to you, our shareholders? Take a look at this
   graph charting the growth of a $10,000 investment in our company versus
   the Standard & Poor's 500 average. As you can see, your $10,000
   investment in 1989 has grown by 21.6 percent per year to now be worth more
   than $70,000, consistently outpacing the S&P 500. I think that's
   significant, and I'm proud to be able to stand here today and show you
   these outstanding returns.

   We also continue to outperform another investment barometer, the Dow
   Jones Utility Average. In 1998, our stock price closed at a record
   30-7/16, which combined with our paid dividend of 96 cents, produced a
   total return to shareholders of 28%.

   I'm pleased to announce today that our earnings for the first quarter
   of 1999 reached 62-cents per share, compared with 49-cents for the same
   quarter of last year. Stronger operating results from our gas, electric
   and water distribution businesses, driven by a return to more normal
   weather patterns, and the inclusion of earnings from Bay State Gas,
   contributed to the stronger earnings. Our competitive products and
   services businesses also had improved performance.





   In addition, you may have heard last week that you are now a shareholder
   of a Fortune 500 company. In the April 26, 1999, edition of Fortune
   magazine, you can see that our 22% yearly return to shareholders over
   each of the last 10 years makes us No. 1 in total return to shareholders
   among all 64 utilities in the Fortune 500.

   The challenge, of course, is to continue to bring these outstanding
   returns to you in a constantly evolving energy/utility world and a
   volatile stock market. What's clear is that you as a shareholder view
   us as primarily a distributor of natural gas, electricity and water.
   This is our identity, and this must remain our primary focus. If we
   stray from building value around our core expertise, we lose our existing
   identity.

   What we believe is emerging is an opportunity to build a distribution
   value chain around our core gas, electric and water businesses. We
   emphasize the word value here because this focus will bring useful
   products and services to our customers as well as financial returns to
   our shareholders. As you can see here, the basic commodity is linked to
   commodity distribution and to commodity conversion. To build the NiSource
   identity, we will focus on logical extensions of this distribution value
   chain.

   Upstream from the commodity distribution businesses - or, from your view,
   to the left on the screen - are many opportunities to reduce risk through
   such services as gas storage; risk management through asset-based commodity
   trading; on-site industrial generation; and various utility services
   including construction, underground facilities locating, and Shared
   Services such as coordinated gas supply and purchasing.

   Downstream from the commodity distribution business is the opportunity
   to sell services and solutions based on our customers' energy and
   service needs. This end of the value chain is more competitive and
   therefore more risky, but it also can give us higher returns as we find
   ways to bring the benefits of gas, electricity and water, not just the
   commodities themselves, to our customers. Some of these opportunities
   might include space heating and cooling; steam for industrial use; water
   heater rentals and maintenance; back-up generation; distributed
   generation that can increase service reliability without the need for
   new transmission lines; and water purification or even in-ground
   sprinkling systems.

   As a result of these opportunities, our business profile continues to
   change.  We are a diverse company focusing on customers in four major
   business sectors: gas, electric, water, and the upstream and downstream
   products and services based on those commodities. Now, with the addition
   of Bay State and increased gas trading volumes, we have nearly $1.7
   billion in gas revenues, $1.4 billion in electric revenues, $84 million
   in water and nearly $125 million in the competitive products and services
   businesses. We expect during 1999 to grow the products and services piece
   and to increase the commodity businesses through customer growth and
   acquisitions.

   I'd like to demonstrate how some significant events of 1998 and early 1999
   build shareholder value along our distribution value chain.

   Two months ago, we completed the acquisition of Bay State Gas Company,
   making NiSource the 10th largest gas distribution company in the United






   States.  Bay State and its subsidiary, Northern Utilities, bring to the
   NiSource family more than 300,000 customers in Massachusetts, New
   Hampshire and Maine. If there are any former Bay State shareholders here
   with us today, I welcome you to your first NiSource Annual Meeting.

   Under the leadership of Jeff Yundt, who is now president and CEO of Bay
   State, and Chairman Roger Young, whom you met earlier when he joined our
   NiSource board, Bay State is focused on operational efficiency, excellent
   customer service, and growth. Most importantly, Bay State gives us a
   beachhead in the Northeast from which we intend to grow our gas distribution
   business. This market offers significant opportunity, since barely half of
   New England's homes and businesses heat with natural gas, compared with a 95
   percent saturation rate here in the Midwest.

   Indianapolis Water Company, our water distribution business, experienced
   record growth in 1998, adding more than 7,000 new customers. This year IWC,
   which is under the leadership of Jim Morris, also has taken over operation
   of the Lawrence, Indiana, municipal water utility, adding another 10,000
   customers.

   This brings our total number of customers in central Indiana to nearly
   264,000.

   Northern Indiana Public Service Company - NIPSCO - continues to prepare
   for a competitive energy marketplace by focusing on managing assets
   efficiently.  During 1998, employees reduced operating expenses by
   another $27 million and managed to further bring down the costs of
   fuel for our generating stations. Prudent fuel purchasing practices
   have driven down our fuel costs by 41% over the last decade, which in
   turn drives down the real cost of electricity to our customers by more
   than 40%.

   NIPSCO continues to invest in new technology to better serve customers, and
   in 1998 installed a computer aided dispatch system. This system, which
   provides computers in our service trucks, enables servicemen like the one
   pictured here to communicate directly with Customer Service and Dispatch
   personnel to improve response to customers' needs. In addition, NIPSCO
   continues to make operational changes that allow us to provide superior
   customer service efficiently. For example, many of you who live in north
   central Indiana probably have heard recently that NIPSCO is consolidating
   its Warsaw and Goshen operating areas. We find that we can better serve
   customers through larger regional operations centers with higher
   concentrations of employee and physical resources, rather than through
   the historically smaller, scattered locations.

   NIPSCO has, for many years, been a leader among utilities in environmental
   stewardship. During 1998 NIPSCO took this leadership position a giant leap
   further by becoming the first utility in North America to achieve ISO 14001
   certification at all of its facilities. This is the international standard
   for implementing an effective environmental management system, and it took
   all of our operating employees working together to integrate the utility's
   programs and facilities with environmental regulations and our overall
   environmental policy.







   Another benefit to the northern Indiana environment is a project at
   NIPSCO's Schahfer Generating Station. The station has contracted with
   Georgia Pacific Company to use all the gypsum output from our scrubber to
   manufacture wallboard. Before, this gypsum was considered a waste product
   and had to be landfilled on site at considerable expense. Now, the gypsum
   is a revenue source.

   Opportunities exist throughout NiSource to implement these types of
   proactive efforts to benefit the environment, and our Board has solidified
   our commitment to environmental initiatives by creating the position of
   Environmental Officer and Counsel. Art Smith assumes this new, critical
   officer position. Art was an attorney for the U.S. Environmental Protection
   Agency before joining our Company eight years ago to lead our environmental
   affairs group. I'm pleased to announce that Art and his team recently added
   another award to the list of our environmental accolades: the North American
   Waterfowl Management Plan's National Great Blue Heron Award, which
   recognizes that our Company is setting the standard for corporate
   environmental responsibility. We are the first utility to ever receive
   this award for our land donations, contributions to local environmental
   projects, redevelopment of brownfields and efforts to reduce emissions.


   Through all of our management initiatives, we strive to improve service to
   customers and enhance shareholder value while benefiting the environment.

   Let me now turn to the upstream opportunities in the energy and utility
   industry.

   Our Crossroads Pipeline Company is well-positioned to meet the growing
   demand for natural gas in the Northeast by supplying gas from the Midwest.
   Crossroads recently completed a successful Open Season showing firm demand
   for its planned western extension, which will expand the options to shippers
   moving gas through the Chicago market hub.

   Crossroads also plans an eastward expansion to connect with the CNG
   Transmission system, which feeds the New England market.  Together with Bay
   State, NiSource owns more than 19 percent of the Portland Natural Gas
   Transmission System, or PNGTS, which earlier this year began moving Canadian
   gas into the Northeastern United States. Here, you see some of the
   construction of this pipeline last year in New Hampshire.

   This is the first of the Canada-to-New England pipelines to come on-line and
   offers us a new source of inexpensive Canadian gas for expansion in the
   Northeast market.

   On April 1 we completed the acquisition of TPC Corporation, a major natural
   gas marketer, gas portfolio manager, and a leading developer of salt dome
   natural gas storage. Through this purchase, NiSource now owns 78 percent of
   Market Hub Partners, the largest independent owner and operator of salt
   cavern storage in North America.

   Just to give you an idea of the depth of these salt caverns, here is a
   comparison of the size of MHP's state-of-the-art natural gas storage
   facilities with the height of the World Trade Center in New York. MHP's
   facilities are strategically located at market hubs near the convergence of





   major natural gas pipelines in Texas and Louisiana, and the partnership
   this year will begin building another cavern in Pennsylvania.

   Under the leadership of NiSource Senior Vice President Jim Abcouwer, TPC's
   gas marketing strength and MHP's assets will provide NiSource the basis for
   significant increase in upstream revenue opportunities in the coming years.

   Our utility services businesses offer another exciting avenue for growth.
   Miller Pipeline Corporation installs gas and water distribution pipelines
   for utilities throughout the Midwest. SM&P Utility Resources is one of the
   largest underground facilities locating companies in the country.

   Both of these businesses are profitable, rapidly growing, and show the
   potential for double-digit growth in meeting the needs of a changing
   industry requiring more cost-effective operational alternatives.

   Our subsidiary Primary Energy continues to meet the needs of large
   industrial customers who also are seeking more cost-effective operational
   alternatives.  Primary Energy, led by Joe Turner, completed its largest
   project to date in 1998 - the Cokenergy plant at Ispat Inland's Indiana
   Harbor Works in East Chicago. This 94-megawatt turbine uses waste heat from
   Ispat Inland's environmentally friendly coke facility to provide steam and
   electricity for steelmaking.

   Primary Energy's next project will be a 50-megawatt cogeneration plant at
   LTV Steel's Indiana Harbor Works in East Chicago. This project will include
   a significant upgrade to LTV's steam capacity and operating control systems,
   making the steelmaker more efficient and globally competitive. Primary
   Energy also will build a major cogeneration and steam facility at the BP
   Amoco facility in Whiting, Indiana, and it is actively working on several
   potential major industrial projects in the Midwest.

   Now let's take a look at several significant developments on the downstream
   end of the value chain.

   One opportunity recently announced is the expansion of NIPSCO's customer
   choice program, which began right here in South Bend less than two years
   ago.  As of this month, all 660,000 NIPSCO natural gas customers in northern
   Indiana have the opportunity to choose their natural gas supplier. NIPSCO
   will continue to deliver the gas to customers' homes and businesses and
   provide customer service. The NIPSCO Choice program offers customers the
   opportunity for choice on the gas supply portion of their bill.

   We're the first utility in Indiana to offer customers this choice. The
   alternative regulatory plan that allows for choice also enables NIPSCO to
   offer customers many new programs and services related to gas supply. For
   example, the Price Protection Service is available to customers who want
   price certainty in their utility bills.

   These new competitive programs help customers understand the value of all
   of the services we offer because they can now compare NIPSCO to the
   competition.

   The acquisition of Bay State by NiSource brought with it the strong energy





   marketing brand, EnergyUSA. We have now restructured many of our competitive
   businesses under the EnergyUSA umbrella, including natural gas marketing and
   trading, retail commodity sales and product development, commercial energy
   solutions and other utility services. Jim Abcouwer also leads this area of
   our business. EnergyUSA already is significantly reducing energy costs for
   many large commercial and industrial customers, including Reebok
   International. When Reebok wanted to reduce dollars spent on heating and
   give employees at two Northeast distribution facilities a more comfortable
   environment in which to work, the footwear maker turned to EnergyUSA for
   complete analysis and service solutions.

   EnergyUSA offers significant opportunities for providing new energy- and
   utility-related products and services to our customers throughout the
   geographic corridor we serve.

   A budding growth market in the energy industry is the opportunity to meet
   the energy needs of residential, commercial and small industrial customers
   by developing relatively small electric generation facilities at or near
   the customer's location. This approach is called distributed generation.
   In this picture you see a microturbine NiSource currently is installing
   at a northern Indiana site of a national retailer. You can see how small
   this turbine is compared with the Primary Energy turbine I showed you
   earlier, yet the cogeneration principle is the same. This microturbine
   will give the customer efficient electricity and will be integrated with
   environmentally friendly heat recovery equipment that will provide the
   customer hot water which will be used for both heating and cooling services.

   NiSource also is investigating other distributed generation technologies,
   such as fuel cells for homes and businesses. We truly believe it's an
   opportune time to develop this new energy supply market.

   You can keep up with our growth by viewing our new NiSource Web site. This
   site debuts today and echoes the theme of our 1998 Annual Report, opening
   doors to new opportunities. You can check the latest stock price, get news
   about NiSource and link directly to our subsidiaries' Web sites.

   We're also now conducting business via the Internet, participating in the
   growing customer service dubbed electronic commerce. Business customers and
   marketers can manage their energy portfolios on-line. By the end of this
   year, you will be able to pay your utility bill or purchase products and
   services using the Web site.

   I hope my discussion has given you a clear picture of this distribution
   value chain along which we will operate and its importance to enhancing
   shareholder value. We believe this value chain minimizes risk and gives
   the greatest opportunity to capture additional value in the energy and
   utility markets. We have the discipline to stay focused on this growth
   strategy in the geographic corridor I have defined.

   One method of insuring success of this focus is the operational integration
   of administrative services through a Shared Services initiative that began
   early this year at NiSource.

   Shared Services organizations have been successfully implemented at many





   other Fortune 500 companies including Kraft Foods, Allied Signal, Johnson
   and Johnson and Duke Energy, just to name a few.

   Functions that will be redesigned into this Shared Services group, serving
   all NiSource subsidiaries, include procurement, auditing, human resources,
   finance and accounting, bill printing, environmental affairs, corporate
   communications and legal services.

   We expect to have the concept fully implemented by the end of next year. In
   addition, we are finding opportunities for operational integration. As an
   example, we recently combined Bay State's gas supply operations into the
   NiSource Corporate Gas Supply department. This combination will allow us to
   better capitalize on opportunities for savings in the gas marketplace.

   I cannot conclude my discussion with you this year without addressing the
   well-publicized Y2K computer issue. I must emphasize that NiSource and all
   its subsidiaries, including NIPSCO, do not anticipate any interruption of
   service due to the Year 2000 date change. We have been addressing the
   potential Y2K problem since 1996, and have a well-coordinated and
   well-documented effort among all NiSource and subsidiary functions to
   remediate and test any systems that could have been affected by the Y2K bug.
   Within the last week, NIPSCO participated in a test of electric utility
   systems all over North America and an internal drill of our ability to
   maintain critical utility operations following possible Y2K scenarios. In
   June the utility will participate in another North America-wide exercise,
   and by October, all NiSource systems will be test-proven Y2K compliant.

   In closing, I'd like to restate our vision - as the doors of opportunity in
   the energy/utility world open, we will:

   *    remain focused on the efficient, reliable distribution of electricity,
        natural gas and water in the Midwest and Northeast; and
   *    we will capitalize on upstream and downstream opportunities to market
        utility services and customer-focused solutions based on those commodity
        resources in a corridor stretching from Texas to Maine.

   We have a new name, but our mission remains to continually enhance service to
   our customers and increase value to our shareholders.

   I appreciate the opportunity to be with you today and am especially pleased
   to be able to share with you the results of our recent performance and our
   vision of your Company's future.

   If there are no further questions, I now declare this meeting adjourned.


   BENEFITS OF THE ACQUISITION

        NiSource Inc. (NYSE: NI) is a holding company whose primary business is
        the distribution of electricity, natural gas and water in the Midwest
        and Northeast United States. The Company also markets utility services
        and customer-focused resource solutions along a corridor stretching from
        Texas to Maine.





        The merger of NiSource and Columbia Energy Group will create a
        super-regional energy company serving 4 million energy and water
        distribution customers in nine states. Because there is no market
        overlap between the utility operations of the two companies, the
        combined company will have direct access to a growing natural gas
        market, which represents 30 percent of the U.S. population and 40
        percent of U.S. energy consumption.

        NiSource's offer price of $68 per share represents a 30.7 percent
        premium over the average closing share price for Columbia common stock
        for the 20 trading days ended June 4, 1999. NiSource has delivered the
        top total return to shareholders among Fortune 500 utilities over the
        last 10 years, while Columbia has underperformed the market during the
        same period.

        NiSource and Columbia will remain focused on delivering value and
        outstanding service to customers.  Both companies have been leaders in
        bringing competition and customer choice to natural gas customers and,
        as a unified organization, NiSource will continue to be an active
        proponent of customer choice in all its markets. The new combined
        company will be poised to deliver upwards of 12 percent annual earnings
        per share growth.

        Furthermore, NiSource believes minimal synergies will be required for
        the merger to be accretive in the first year. Both NiSource and Columbia
        employees will play key roles in the success of the combined
        organization. Employees will build on their track record of operational
        excellence to drive profitability.

   NISOURCE HIGHLIGHTS (FOR THE THREE MONTHS ENDED MARCH 31, 1999)

             Total Assets: $6.2 billion

             Operating Revenues: $891 million

             Net Income: $77 million

             Earnings Per Share: $0.62

             Dividends Per Share: $0.255

             Number of Employees: 7,500

   RECENT ACQUISITION HISTORY

   Kokomo Gas & Fuel Company, Kokomo, Ind.

             Kokomo Gas provides natural gas distribution service to
             approximately 33,800 customers in east central Indiana. Acquisition
             was completed in February 1992.  Price: $47.9 million.

   Northern Indiana Fuel & Light Company (NIFL), Auburn, Ind.

             NIFL provides natural gas distribution service to approximately





             34,380 customers in the northeast corner of Indiana. Acquisition
             was completed in March 1993. Price: $30.2 million.

   IWC RESOURCES CORP. (IWCR), INDIANAPOLIS, IND.

             IWCR's water utilities serve 264,000 customers in the Indianapolis
             area.  IWCR also brought to the NiSource family of companies one of
             the country's major pipeline construction companies, Miller
             Pipeline Corporation, and the largest underground utility locating
             and marking service business in the United States, SM&P Utility
             Resources. Acquisition was completed in March 1997.  Price: $290
             million.

   BAY STATE GAS COMPANY, WESTBOROUGH, MASS.

             Bay State provides natural gas distribution service to  more than
             305,000 customers in Massachusetts, New Hampshire and Maine. The
             purchase gives NiSource a beachhead in the rapidly expanding New
             England gas market.  Acquisition was completed in February 1999.
             Price: $780 million.

   TPC CORPORATION, HOUSTON, TEXAS

             TPC is a major natural gas marketer, utility gas asset portfolio
             manager and a leading developer of salt cavern gas storage. The
             acquisition included TPC's 66 percent interest in Market Hub
             Partners, L.P. (MHP), giving NiSource 78 percent ownership of the
             largest independent owner and operator of salt cavern natural gas
             storage in North America. Acquisition was completed in April 1999.
             Price: $150 million.

   BIOGRAPHICAL INFORMATION

   Chairman Gary L. Neale

             Gary L. Neale joined NiSource in August 1989 as President and Chief
             Operating Officer and was promoted to Chairman, President and Chief
             Executive Officer in March 1993. Mr. Neale brings an extensive
             history in the energy industry to NiSource. He was Chairman,
             President and Chief Executive Officer of Planmetrics, Inc., an
             energy industry management consulting firm, for 17 years. Mr. Neale
             also held management positions at Wells Fargo Bank and Kaiser
             Industries.

             Mr. Neale will serve as the next chairman of the American Gas
             Association, and he is Chairman of the North American Reliability
             Council. His other industry affiliations include serving on the
             boards of directors of the Edison Electric Institute and the
             Association of Edison Illuminating Companies, and he has been
             appointed by the governor of Indiana to the Economic Development
             Council, the Energy Policy Forum and the Clean Air Advisory
             Committee.  In addition, Mr. Neale serves on several corporate and
             civic boards and has published articles in Business Week, Public
             Utilities Fortnightly and the Harvard Business Review. He earned





             his B.A. and M.B.A. degrees from the University of Washington.

                   FOR INFORMATION ABOUT TENDERING YOUR SHARES,
                      CALL INNISFREE M&A AT 877-750-5837.






                                  WWW.NISOURCE.COM

   *NOTE:  Logo provided for news reporting purposes only and subject to
   withdrawal at any time upon ntoice from Nisource.  Commercial and other uses
   prohibited without the written consent of NiSource.




                                           [NiSource logo and regional map
                                            of the United States depicting
                                            states which NiSource serves]



   CONTACT US


   GENERAL QUESTIONS:

                               [email protected]

   FOR INFORMATION ABOUT TENDERING YOUR SHARES:

                        call Innisfree M&A at 877-750-5837.



                                  WWW.NISOURCE.COM







                                                EXHIBIT 11(a)(23)
                                                -----------------


   FOR IMMEDIATE RELEASE

   FOR FURTHER INFORMATION, CONTACT:

   INVESTORS:   Dennis Senchak      Rae Kozlowski       Wendy Wilson
                NiSource Inc.       NiSource Inc.       Hill & Knowlton
                219-647-6085        219-647-6083        312-255-3033


   MEDIA:    Maria Hibbs         Larry Larsen
             NiSource Inc.       Hill & Knowlton
             219-647-6201        312-255-3084

                NISOURCE LAUNCHES "YES TO NISOURCE" WEB SITE

               Investors And Media Can Access Information On
               Columbia Tender Offer At www.yes2nisource.com

        Merrillville, Ind., July 30, 1999   NiSource Inc. (NYSE: NI)
   today launched a web site located on the Internet at
   http://www.yes2nisource.com.  The purpose of this site is to provide
   timely and accurate information on its tender offer for Columbia
   Energy Group.

       Information on the site includes:

        -    "Compare NI-CG" a digest of pertinent financial
             information with a link to NiSource's presentation to
             analysts about the offer.

        -    "About the tender offer"   a description of and reasons for
             the tender offer.

        -    "FAQ's"   the answers to frequently asked questions on the
             combination of the two companies.

        -    "Press releases" and "media tools"   access to every press
             release NiSource has issued on the transaction; a NiSource
             fact sheet; picture of President, Chairman and CEO Gary
             Neale; the NiSource logo and video highlights of the
             company's 1999 Annual Meeting of Shareholders.

        "We want investors to have the information they need to make an
   informed judgment on this transaction," Neale said.  "We are confident
   that, armed with this knowledge, they will support our position that
   it's time for Columbia to sit down to negotiate our offer."

        The company's general web site, http://www.nisource.com, contains
   detailed information on NiSource, its subsidiaries, community
   involvement, economic development, environmental initiatives,
   employment and other topics.





        NiSource Inc. is a holding company with a market capitalization
   of approximately $3.6 billion whose primary business is the
   distribution of electricity, natural gas and water in the Midwest and
   Northeast United States.  The company also markets utility services
   and customer-focused resource solutions along a corridor stretching
   from Texas to Maine.  Further information on the company may be
   accessed on the Internet at www.yes2nisource.com or www.nisource.com.


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

        This release is neither an offer to purchase nor a solicitation
   of an offer to sell shares of common stock of Columbia Energy Group.
   Such offer is made solely by the Offer to Purchase, dated June 25,
   1999, as amended, and the related Letter of Transmittal.  It is not
   being made to, and tenders will not be accepted from, holders of
   shares of Columbia common stock in any jurisdiction in which making or
   accepting such offer would not comply with law. In any jurisdiction
   where a licensed broker or dealer must make such offer, it shall be
   deemed made on behalf of NiSource Inc. by Credit Suisse First Boston
   or other registered brokers or dealers licensed in such jurisdiction.
   The offer may be extended beyond its August 6, 1999 expiration date.
   Any extension will be publicly announced no later than 9:00 a.m., New
   York City time, on the next business day. This release does not
   constitute a solicitation of proxies from Columbia Energy Group's
   stockholders.  Any such solicitation will be made only by separate
   proxy materials in compliance with Section 14(a) of the Securities
   Exchange Act.


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