MICHIGAN CONSOLIDATED GAS CO /MI/
424B5, 1997-05-09
NATURAL GAS DISTRIBUTION
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<PAGE>   1
                                                  Filed Pursuant to Rule 424(b)5
                                                  Registration No. 333-16285

 
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission. This prospectus supplement and the
     accompanying prospectus shall not constitute an offer to sell or the
     solicitation of an offer to buy nor shall there be any sale of these
     securities in any State in which such offer, solicitation or sale would be
     unlawful prior to registration or qualification under the securities laws
     of any such State.
 
                    SUBJECT TO COMPLETION, DATED MAY 9, 1997
 
<TABLE>
<S>                                                                                    <C>
PROSPECTUS SUPPLEMENT                                                                  STANDARD & POOR'S RATING: A
- ------------------------------------                                                            MOODY'S RATING: A2
(TO PROSPECTUS DATED DECEMBER 13, 1996)                                                   DUFF & PHELPS RATING: A+
                                                                                                   FITCH RATING: A
</TABLE>
 
                                  $30,000,000
 
                       MICHIGAN CONSOLIDATED GAS COMPANY
                       FIRST MORTGAGE BONDS DESIGNATED AS
                % SECURED MEDIUM-TERM NOTES, SERIES C, DUE MAY 1, 2007
                            ------------------------
     The First Mortgage Bonds designated as   % Secured Medium-Term Notes,
Series C, due May 1, 2007 (the "Offered Bonds") offered hereby (the "Bonds
Offering") are being issued by Michigan Consolidated Gas Company ("MichCon" or
the "Company"). Interest on the Offered Bonds is payable semiannually on
February 1 and August 1 beginning August 1, 1997. The Offered Bonds are not
redeemable prior to maturity.
 
     The Offered Bonds will be issued in the form of one Global Security (a
"Global Security") registered in the name of the nominee of The Depository Trust
Company, as Depositary (as defined below) and such nominee will be the sole
holder of the Offered Bonds. An owner of an interest in the Offered Bonds
("Beneficial Owner") will not be entitled to the delivery of a definitive
security except in limited circumstances. A Beneficial Owner's interest in the
Global Security will be indicated on, and transfers will be effected only
through, records maintained by the Depositary and its participants. See
"Description of the Offered Bonds" herein.
 
     There is currently no market for the Offered Bonds and there is no
assurance that one will develop.
 
     Concurrently with the Bonds Offering, the Company is offering, pursuant to
separate Prospectus Supplements, $40,000,000 aggregate principal amount of First
Mortgage Bonds designated as Secured Medium-Term Notes, Series B, due May 1,
2012 and $15,000,000 aggregate principal amount of First Mortgage Bonds
designated as Secured Medium-Term Notes, Series C, due May 1, 2017
(collectively, the "Separate Bonds Offerings"). The net proceeds of the Bonds
Offering, together with the net proceeds of the Separate Bonds Offerings, are
expected to be used to repay short-term debt used to retire First Mortgage Bonds
on May 1, 1997, fund capital expenditures and for general corporate purposes.
Consummation of the Bonds Offering is not a condition to consummation of the
Separate Bonds Offerings, and consummation of the Separate Bonds Offerings is
not a condition to consummation of the Bonds Offering.
                            ------------------------
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
   ACCURACY OR ADEQUACY OF THIS PROSPECTUS SUPPLEMENT OR THE PROSPECTUS. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
=============================================================================================================
                                           Price to               Underwriting             Proceeds to
                                          Public(1)               Discount(2)               Company(3)
- -------------------------------------------------------------------------------------------------------------
<S>                                       <C>                      <C>                      <C>
Per Offered Bond.................             %                        %                        %
  Total..........................             $                        $                        $
=============================================================================================================
</TABLE>
 
(1) Plus accrued interest, if any, from May   , 1997.
(2) The Company has agreed to indemnify Robert W. Baird & Co. Incorporated,
    First of Michigan Corporation and Roney & Co., LLC (the "Underwriters")
    against, and to provide contribution with respect to, certain liabilities,
    including liabilities under the Securities Act of 1933, as amended. See
    "Underwriting".
(3) Before deducting estimated expenses of $100,000 payable by the Company.
                            ------------------------
 
     The Offered Bonds are offered by the Underwriters, subject to prior sale,
when, as and if issued to and accepted by the Underwriters subject to approval
of certain legal matters by counsel for the Underwriters and certain other
conditions. The Underwriters reserve the right to withdraw, cancel, or modify
such offer and to reject orders in whole or in part. It is expected that
delivery of the Global Securities will be made through the facilities of the
Depositary in New York, New York, on or about May   , 1997 against payment
therefor in immediately available funds.
                            ------------------------
 
ROBERT W. BAIRD & CO.
        INCORPORATED
 
                         FIRST OF MICHIGAN CORPORATION
                                                                     RONEY & CO.
                            ------------------------
 
            The date of this Prospectus Supplement is May   , 1997.
<PAGE>   2
 
     CERTAIN PERSONS PARTICIPATING IN THE BONDS OFFERING MAY ENGAGE IN
TRANSACTIONS THAT STABILIZE, MAINTAIN, OR OTHERWISE AFFECT THE PRICE OF THE
OFFERED BONDS. SUCH TRANSACTIONS MAY INCLUDE STABILIZING TRANSACTIONS, THE
PURCHASE OF OFFERED BONDS TO COVER SHORT POSITIONS IN THE OFFERED BONDS
MAINTAINED BY THE UNDERWRITERS, AND THE IMPOSITION OF PENALTY BIDS. FOR A
DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
 
                                       S-2
<PAGE>   3
 
                                    SUMMARY
 
     The following summary is qualified in its entirety by the more detailed
information appearing elsewhere in this Prospectus Supplement and the
accompanying Prospectus and by the more detailed information and the financial
statements and notes appearing in the incorporated documents.
 
                                  THE COMPANY
 
     Michigan Consolidated Gas Company ("MichCon" or the "Company") is a
Michigan corporation that was organized in 1898 and, with its predecessors, has
been in business for nearly 150 years. MichCon is a natural gas distribution and
transmission company serving 1.2 million customers in more than 500 communities
throughout Michigan. MichCon is one of the largest natural gas distributors in
the United States.
 
     The following services are provided by MichCon:
 
     - GAS SALES -- Marketing and delivery of natural gas to residential and
       small-volume commercial customers.
 
     - END USER TRANSPORTATION -- Transportation service to large volume
       customers that purchase gas directly from producers or gas brokers using
       the Company's gas distribution network.
 
     - INTERMEDIATE TRANSPORTATION -- Transportation service to producers,
       brokers and other local distribution companies that own the natural gas,
       but are not the ultimate consumer.
 
     MichCon is a wholly-owned subsidiary of MCN Energy Group Inc. ("MCN"), a
New York Stock Exchange-listed company (ticker symbol: MCN). MCN's other
principal operating subsidiary is MCN Investment Corporation, a subsidiary
holding company for various diversified energy businesses.
 
                               THE BONDS OFFERING
 
SECURITIES OFFERED............   $30,000,000 aggregate principal amount of First
                                 Mortgage Bonds, designated as Secured
                                 Medium-Term Notes, Series C.
 
MATURITY DATE.................   May 1, 2007.
 
INTEREST......................      % payable semiannually on each February 1
                                 and August 1, commencing August 1, 1997.
 
USE OF PROCEEDS...............   To repay short-term debt used to retire First
                                 Mortgage Bonds on May 1, 1997, fund capital
                                 expenditures and for general corporate
                                 purposes.
 
SEPARATE BONDS OFFERING.......   Concurrently with the Bonds Offering, the
                                 Company is offering $40,000,000 aggregate
                                 principal amount of First Mortgage Bonds
                                 designated as Secured Medium-Term Notes, Series
                                 B, due May 1, 2012 and $15,000,000 aggregate
                                 principal amount of First Mortgage Bonds
                                 designated as Secured Medium-Term Notes, Series
                                 C, due May 1, 2017. Consummation of the Bonds
                                 Offering is not a condition to consummation of
                                 the Separate Bonds Offerings, and consummation
                                 of the Separate Bonds Offerings is not a
                                 condition to the consummation of the Bonds
                                 Offering.
                                       S-3
<PAGE>   4
 
                       CONSOLIDATED FINANCIAL INFORMATION
                   (THOUSANDS, EXCEPT RATIOS AND PERCENTAGES)
 
<TABLE>
<CAPTION>
                                                                   YEAR ENDED DECEMBER 31
                             12 MONTHS ENDED   --------------------------------------------------------------
                             MARCH 31, 1997       1996         1995         1994         1993         1992
                             ---------------      ----         ----         ----         ----         ----
<S>                          <C>               <C>          <C>          <C>          <C>          <C>
Operating Revenues(1)......    $1,254,838      $1,258,785   $1,080,813   $1,111,678   $1,223,515   $1,357,785
Operating Income...........       153,869         168,001      156,287      126,318      125,611      107,635
Net Income(2)..............        71,995          79,842       71,723       59,868       62,376       50,821
Net Income Available for
  Common Stock.............        71,995          79,824       71,488       59,387       61,649       49,848
Interest Charges...........        52,432          51,175       42,873       37,041       33,555       35,971
Ratio of Earnings to Fixed
  Charges(3)(4)............          2.96            3.27         3.47         3.26         3.58         2.99
Long-Term Debt (including
  capital leases and
  excluding current
  maturities) as Percentage
  of Total
  Capitalization...........          46.8%           48.8%        51.3%        51.6%        50.0%        45.6%
</TABLE>
 
- -------------------------
(1) Commencing with the financial statements for the year ended December 31,
    1994, certain revenues, which previously had been recorded as an offset to
    operations and maintenance expense, were reclassified to Operating Revenues.
    The amounts of Operating Revenues for the years ended December 31, 1992 and
    1993 have been restated in the Prospectus Supplement in accordance with this
    new classification.
 
(2) On June 30, 1993, MichCon discontinued the business of its gas marketing
    subsidiary, MichCon Trading Company ("Trading Company"), and sold the net
    assets to subsidiaries of MCN, its parent company. MichCon accounted for the
    transaction as a sale of a part of a line of business. The final sales price
    of the transaction equaled the book value of Trading Company's net assets,
    approximately $42,000,000. Trading Company's net income included in
    MichCon's consolidated net income above was approximately $2,001,000 and
    $579,000 for the twelve-month periods ended December 31, 1992 and 1993,
    respectively. MichCon paid a $21,000,000 special dividend to MCN in July
    1993, out of the sale proceeds.
 
(3) For the purpose of computing these ratios, earnings consist of net income
    plus income taxes and fixed charges. Fixed charges consist of total
    interest, amortization of debt discount, premium and expense and the
    estimated portion of interest implicit in rentals.
 
(4) The Company is a guarantor of certain other debt. Fixed charges related to
    such debt, deemed to be immaterial, have been excluded in computing the
    above ratios.
 
                        CAPITALIZATION AT MARCH 31, 1997
                        (THOUSANDS, EXCEPT PERCENTAGES)
 
<TABLE>
<CAPTION>
                                                                                           AS FURTHER
                                               ACTUAL             AS ADJUSTED(2)           ADJUSTED(3)
                                         -------------------    -------------------    -------------------
<S>                                      <C>           <C>      <C>           <C>      <C>           <C>
Long-Term Debt (including capital
  leases and excluding current
  maturities)(1).....................    $  549,000     46.8%   $  579,000     48.1%   $  634,000     50.4%
Common Shareholder's Equity..........       624,197     53.2%      624,197     51.9%      624,197     49.6%
                                         ----------    -----    ----------    -----    ----------    -----
     Total Capitalization............    $1,173,197    100.0%   $1,203,197    100.0%   $1,258,197    100.0%
                                         ==========    =====    ==========    =====    ==========    =====
</TABLE>
 
- -------------------------
(1) Current maturities of Long-Term Debt were $51,822,000.
 
(2) Adjusted for the sale of the Offered Bonds at par. The Company targets an
    average ratio of 50% long-term debt to total capitalization and anticipates
    retaining future earnings to achieve this ratio.
 
(3) Further adjusted for the sale of the bonds to be offered in the Separate
    Bonds Offerings at par.
                                       S-4
<PAGE>   5
 
                                USE OF PROCEEDS
 
     Proceeds from the sale of the Offered Bonds, in respect of which this
Prospectus Supplement is being delivered, will be used to repay short-term debt
used to retire First Mortgage Bonds on May 1, 1997, fund capital expenditures
and for general corporate purposes.
 
                        DESCRIPTION OF THE OFFERED BONDS
 
     The following description of the particular terms of the Offered Bonds
(referred to in the Prospectus as the "Description of the New Bonds")
supplements, and to the extent inconsistent therewith replaces, the description
of the general terms and provisions of the New Bonds set forth in the
Prospectus, to which description reference is hereby made. Capitalized terms
defined in the Prospectus have the same meanings when used herein.
 
GENERAL
 
     The Offered Bonds will be issued as part of the existing series of the
Company's First Mortgage Bonds designated as Secured Medium-Term Notes, Series
C, issued under the Twenty-Ninth Supplemental Indenture dated as of July 15,
1989 (the "New Restating Supplemental Indenture") as supplemented by the
Thirty-Fourth Supplemental Indenture dated as of November 1, 1996 relating to
the Offered Bonds. The following statements relating to the Offered Bonds and
certain provisions of the New Restating Supplemental Indenture are summaries, do
not purport to be complete, and are subject to and are qualified in their
entirety by reference to the provisions of the New Restating Supplemental
Indenture and the Thirty-Fourth Supplemental Indenture.
 
NEW RESTATING SUPPLEMENTAL INDENTURE
 
     The New Restating Supplemental Indenture includes a restatement of the
Indenture originally written in 1944 as subsequently supplemented. The New
Restating Supplemental Indenture is designed to make the Indenture consistent
with modern industry practice and to permit various economies of operation. The
terms of the New Restating Supplemental Indenture became effective on April 1,
1994 upon the retirement of all bonds issued prior to March 1, 1987 and upon the
filing of the required certificates with the Trustee by the Company. See
"Description of the New Bonds" in the accompanying Prospectus for a description
of these terms.
 
BOOK-ENTRY ONLY SYSTEM
 
     Except under the circumstances described below, the Offered Bonds will be
issued in whole or in part in the form of one or more Global Securities that
will be deposited with, or on behalf of, The Depository Trust Company, New York,
New York ("DTC"), or such other depositary as may be subsequently designated
(the "Depositary"), and registered in the name of the Depositary.
 
     So long as the Depositary, or its nominee, is the registered owner of a
Global Security, such Depositary or such nominee, as the case may be, will be
considered the sole holder of the individual Offered Bonds represented by such
Global Security for all purposes under the Indenture. Payments of principal of
and premium, if any, and any interest on individual Offered Bonds represented by
a Global Security will be made to the Depositary or its nominee, as the case may
be, as the Holder of such Global Security. Except as set forth below, owners of
beneficial interests in a Global Security will not be entitled to have any of
the individual Offered Bonds represented by such Global Security registered in
their names, will not receive or be entitled to receive physical delivery of any
such Offered Bonds and will not be considered the Holders thereof under the
Indenture, including, without limitation, for purposes of consenting to any
amendment thereof or supplement thereto.
 
                                       S-5
<PAGE>   6
 
     The following is based on information furnished by DTC:
 
          DTC will act as securities depository for the Global Securities
     representing the Offered Bonds. The Offered Bonds will be issued as
     fully-registered securities registered in the name of Cede & Co. (DTC's
     partnership nominee). The Offered Bonds will be issued as one or more
     fully-registered Global Securities certificate(s) in the aggregate
     principal amount of such issue, and will be deposited with DTC.
 
          DTC is a limited-purpose trust company 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 pursuant to the provisions of Section 17A of the Securities
     Exchange Act of 1934. DTC holds securities that its participants
     ("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. Direct Participants ("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 the DTC 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, either directly or indirectly ("Indirect
     Participants"). The Rules applicable to DTC and its Participants are on
     file with the Securities and Exchange Commission.
 
          Purchases of Offered Bonds under the DTC system must be made by or
     through Direct Participants, which will receive a credit for the Offered
     Bonds on DTC's records. The ownership interest of each actual purchaser of
     each Offered Bond ("Beneficial Owner") is in turn to be recorded on the
     Direct and Indirect Participants' records. Beneficial Owners will not
     receive written confirmation from DTC of their purchase, but Beneficial
     Owners are expected to receive written confirmation providing details of
     the transaction, as well as periodic statements of their holdings, from the
     Direct or Indirect Participants through which the Beneficial Owner entered
     into the transaction. Transfers of beneficial ownership interest in the
     Offered Bonds are to be accomplished by entries made on the books of
     Participants acting on behalf of Beneficial Owners. Beneficial Owners will
     not receive certificates representing their beneficial ownership interest
     in the Offered Bonds, except in the event that use of the book-entry system
     for the Offered Bonds is discontinued.
 
          To facilitate subsequent transfers, all of the Offered Bonds deposited
     by Participants with DTC are registered in the name of DTC's partnership
     nominee, Cede & Co. The deposit of Offered Bonds with 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
     Offered Bonds; DTC's records reflect only the identity of the Direct
     Participants to whose accounts such Offered Bonds 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 Participants 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.
 
          Redemption notices shall be sent to Cede & Co. If less than all of the
     Offered Bonds within an issue 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.
 
          Neither DTC nor Cede & Co. will consent or vote with respect to the
     Offered Bonds. Under its usual procedures, DTC mails an "Omnibus Proxy" to
     the Company as soon as possible after the record date. The "Omnibus Proxy"
     assigns Cede & Co.'s consenting or voting rights to those Direct
     Participants to
 
                                       S-6
<PAGE>   7
 
     whose accounts the Offered Bonds are credited on the record date
     (identified in a listing attached to the "Omnibus Proxy").
 
          Principal and interest payments on the Offered Bonds will be made to
     DTC. DTC's practice is to credit Direct Participants' accounts on the
     payable date(s) in accordance with their respective holdings shown on DTC's
     records unless DTC has reason to believe that it will not receive payment
     on the payable 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 such
     Participant and not of DTC, the Trustee, or the Company, subject to any
     statutory or regulatory requirements as may be in effect from time to time.
     Payment of principal and interest to DTC is the responsibility of the
     Company or the Trustee, disbursement of such payments to Direct
     Participants shall be the responsibility of DTC, and disbursement of such
     payments to the Beneficial Owners shall be the responsibility of Direct and
     Indirect Participants.
 
          The Depositary may discontinue providing its services as Securities
     depository with respect to the Offered Bonds at any time by giving
     reasonable notice to the Company or the Trustee. Under such circumstances,
     in the event that a successor securities depository is not obtained,
     Offered Bonds in certificated form ("Certificated Bonds") are required to
     be printed and delivered.
 
          The Company may decide to discontinue use of the system of book-entry
     transfers through DTC (or a successor securities depositary). In that
     event, Certificated Bonds will be printed and delivered.
 
          The information provided under this caption concerning DTC and DTC's
     book-entry system has been obtained from sources that the Company believes
     to be reliable, but the Company takes no responsibility for the accuracy
     thereof.
 
     NONE OF THE COMPANY, THE TRUSTEE UNDER THE INDENTURE OR ANY AGENT FOR
PAYMENT ON OR REGISTRATION OF TRANSFER OR EXCHANGE OF SUCH OFFERED BONDS WILL
HAVE ANY RESPONSIBILITY OR LIABILITY FOR ANY ASPECT OF THE RECORDS RELATING TO
OR PAYMENTS MADE ON ACCOUNT OF BENEFICIAL INTERESTS IN SUCH GLOBAL SECURITY OR
FOR MAINTAINING, SUPERVISING OR REVIEWING ANY RECORDS RELATING TO SUCH
BENEFICIAL INTEREST.
 
INTEREST AND MATURITY
 
     The Offered Bonds will bear interest at the rate per annum shown on the
front cover of this Prospectus Supplement, payable semiannually on February 1
and August 1 of each year, beginning August 1, 1997, to holders of record on the
preceding January 15 and July 15, respectively. The Offered Bonds will mature on
May 1, 2007. The Offered Bonds will be issued in the form of one Global Security
for the Offered Bonds and will be in denominations of $1,000 and integral
multiples thereof.
 
REDEMPTION
 
     The Offered Bonds will not be redeemable prior to maturity.
 
SINKING FUND
 
     The Offered Bonds are not subject to a sinking fund.
 
                                       S-7
<PAGE>   8
 
                                  UNDERWRITING
 
     The Underwriters named below have severally agreed, subject to the terms
and conditions of the Underwriting Agreement dated May   , 1997, to purchase
from the Company the principal amount of the Offered Bonds set forth opposite
their respective names.
 
<TABLE>
<CAPTION>
                                                                  PRINCIPAL
                                                                  AMOUNT OF
                        UNDERWRITER                             OFFERED BONDS
                        -----------                             -------------
<S>                                                             <C>
Robert W. Baird & Co. Incorporated..........................     $
First of Michigan Corporation...............................
Roney & Co., LLC............................................
                                                                 -----------
                                                                 $30,000,000
                                                                 ===========
</TABLE>
 
     The Underwriting Agreement provides that the obligations of the several
Underwriters to pay for and accept delivery of the Offered Bonds is subject to
approval of certain legal matters by their counsel and to certain other
conditions. The Underwriters are committed to purchase all of the Offered Bonds
if any are purchased. In the event of default by an Underwriter, the
Underwriting Agreement provides that, in certain circumstances, the purchase
commitments of the nondefaulting Underwriters may be increased or the
Underwriting Agreement may be terminated.
 
     The Underwriters have advised the Company that they propose initially to
offer the Offered Bonds to the public at the public offering price set forth on
the cover page of this Prospectus Supplement and in part to certain securities
dealers, which are members of the National Association of Securities Dealers,
Inc., at such price less concessions as they may determine within their
discretion. After the initial public offering of the Offered Bonds, the public
offering price and concessions may be changed.
 
     Until the distribution of the Offered Bonds is completed, rules of the
Securities and Exchange Commission may limit the ability of the Underwriters to
bid for and purchase the Offered Bonds. As an exception to these rules, the
Underwriters are permitted to engage in certain transactions that stabilize the
price of the Offered Bonds. Such transactions consist of bids or purchases for
the purpose of pegging, fixing or maintaining the price of the Offered Bonds.
 
     If the Underwriters create a short position in the Offered Bonds in
connection with the offering, i.e., if they sell more Offered Bonds than are set
forth on the cover page of this Prospectus Supplement, the Underwriters may
reduce that short position by purchasing Offered Bonds in the open market.
 
     In general, purchases of a security for the purpose of stabilization or to
reduce a short position could cause the price of the security to be higher than
it might be in the absence of such purchases.
 
     Neither MichCon nor the Underwriters make any representation or prediction
as to the direction or magnitude of any effect that the transactions described
above may have on the price of the Offered Bonds. In addition, neither MichCon
nor the Underwriters make any representation that the Underwriters will engage
in such transactions or that such transactions, once commenced, will not be
discontinued without notice.
 
     The Offered Bonds are new issues of securities with no established trading
market. The Company currently has no intention to list the Offered Bonds on any
securities exchange. The Company has been advised by the Underwriters that they
intend to make a market in the Offered Bonds, but are not obligated to do so and
may discontinue any market making at any time without notice. No assurance can
be given as to the liquidity of, or the existence of a trading market for, the
Offered Bonds.
 
     The Company has agreed to indemnify the Underwriters against certain
liabilities and contribute to payments the Underwriters may be required to make
in respect thereof, including liabilities under the Securities Act of 1933, as
amended.
 
                                       S-8
<PAGE>   9
 
     Consummation of the Bonds Offering is not a condition to consummation of
the Separate Bonds Offerings, and consummation of the Separate Bonds Offerings
is not a condition to consummation of the Bonds Offerings.
 
                                 LEGAL OPINIONS
 
     The legality of the Offered Bonds will be passed upon for the Company by
Susan K. McNish, Vice President, General Counsel and Secretary of MichCon and
for the Underwriters by LeBoeuf, Lamb, Greene & MacRae, L.L.P., a limited
liability partnership including professional corporations, 125 West 55th Street,
New York, New York 10019-5389. LeBoeuf, Lamb, Greene & MacRae, L.L.P. from time
to time renders legal services to MichCon.
 
                                       S-9
<PAGE>   10
 
PROSPECTUS
 
                                  $300,000,000
 
                       MICHIGAN CONSOLIDATED GAS COMPANY
                              FIRST MORTGAGE BONDS
 
                            ------------------------
 
     Michigan Consolidated Gas Company ("MichCon" or the "Company") from time to
time may offer, in an aggregate principal amount not to exceed $300,000,000, its
First Mortgage Bonds. First Mortgage Bonds aggregating $40,000,000 have been
designated as Secured Medium-Term Notes, Series B and will be issued under the
Company's Thirty-third Supplemental Indenture and First Mortgage Bonds
aggregating $260,000,000 designated as Secured Medium-Term Notes, Series C will
be issued under the Company's Thirty-fourth Supplemental Indenture. The
combination of First Mortgage Bonds designated as Secured Medium-Term Notes,
Series B and First Mortgage Bonds designated as secured Medium-Term Notes Series
C (the "New Bonds") may be offered in amounts, at prices and on terms to be
determined at the time of sale. Certain terms of the New Bonds including, where
applicable, the specific designation, aggregate principal amount, interest rate,
interest payment dates, maturity, public offering price, any redemption terms or
other specific terms of each series of New Bonds in respect of which this
Prospectus is being delivered will be set forth in an accompanying Prospectus
Supplement or Supplements (a "Prospectus Supplement").
 
     MichCon may sell the New Bonds to or through underwriters, through dealers,
directly to purchasers or through agents. See "Plan of Distribution".
Underwriters may include Merrill Lynch & Co. (Merrill Lynch, Pierce, Fenner &
Smith Incorporated) or such other underwriter or underwriters as may be
designated by MichCon, or an underwriting syndicate represented by one or more
of such firms. Such firms may also act as agents. The Prospectus Supplement will
set forth the names of such underwriters, dealers or agents, if any, any
applicable commissions or discounts and the proceeds to MichCon from such sale.
 
     This Prospectus may not be used to consummate sales of New Bonds unless
accompanied by a Prospectus Supplement applicable to the New Bonds being sold.
 
                            ------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
    AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR
       HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
          SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
              ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION
                 TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
               The date of this Prospectus is December 13, 1996.
<PAGE>   11
 
                             AVAILABLE INFORMATION
 
     MichCon is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended, (the "1934 Act") and in accordance therewith
files reports and other information with the Securities and Exchange Commission
(the "SEC"). Such reports and other information can be inspected and copied at
the SEC's Public Reference Room; Judiciary Plaza, 450 Fifth Street, N.W.,
Washington, D.C. 20549, as well as the following Regional Offices of the SEC: 7
World Trade Center, Suite 1300, New York, New York 10048; and Northwestern
Atrium Center, 500 West Madison Street, Suite 1400, Chicago, Illinois
60661-2511. Copies of such material can be obtained from the Public Reference
Section of the SEC at Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C.
20549, at prescribed rates. The Commission also maintains a Web Site on the
Internet that contains reports and other information regarding registrants that
file electronically with the Commission (http://www.sec.gov).
 
     This Prospectus constitutes a part of a Registration Statement on Form S-3
(together with all amendments and exhibits thereto, the "Registration
Statement") filed by MichCon with the SEC under the Securities Act of 1933, as
amended (the "Securities Act") with respect to the New Bonds. This Prospectus
does not contain all of the information set forth in such Registration
Statement, certain parts of which are omitted in accordance with the rules and
regulations of the SEC. Reference is made to such Registration Statement and to
the exhibits relating thereto for further information with respect to MichCon
and the New Bonds. Any statements contained herein concerning the provisions of
any document filed as an exhibit to the Registration Statement or otherwise
filed with the SEC or incorporated by reference herein are not necessarily
complete, and in each instance reference is made to the copy of such document so
filed for a more complete description of the matter involved. Each such
statement is qualified in its entirety by such reference.
                           -------------------------
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     There are hereby incorporated by reference in this Prospectus and made a
part hereof the following documents heretofore filed with the SEC pursuant to
the 1934 Act:
 
          1. MichCon's Annual Report on Form 10-K for the year ended December
     31, 1995.
 
          2. MichCon's Quarterly Reports on Form 10-Q for the quarters ended
     March 31, 1996, June 30, 1996, and September 30, 1996.
 
     All documents filed by MichCon pursuant to Sections 13(a), 13(c), 14 or
15(d) of the 1934 Act after the date of this Prospectus and prior to the
termination of the offering of the securities offered hereby shall be deemed to
be incorporated by reference in this Prospectus and to be a part hereof from the
date of filing such documents.
 
     Any statement contained herein or in a document incorporated or deemed to
be incorporated by reference in this Prospectus or in any Prospectus Supplement
shall be deemed to be modified or superseded for purposes of this Prospectus or
any Prospectus Supplement to the extent that a statement contained in this
Prospectus or in any Prospectus Supplement or in any other subsequently filed
document which also is or is deemed to be incorporated by reference in this
Prospectus or in any Prospectus Supplement modifies or supersedes such
statement. Any statement so modified or superseded shall not be deemed, except
as so modified or superseded, to constitute a part of this Prospectus or any
Prospectus Supplement.
 
     MichCon hereby undertakes to provide without charge to each person to whom
a copy of this Prospectus has been delivered, on the written or oral request of
any such person, a copy of any or all of the documents referred to above which
have been or may be incorporated by reference in this Prospectus, other than
exhibits to such documents. Requests for such copies should be directed to:
Investor Relations, MCN Corporation, 500 Griswold Street, Detroit, Michigan
48226; telephone 1-800-548-4655.
 
     NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED OR INCORPORATED BY REFERENCE IN THIS
PROSPECTUS OR THE PROSPECTUS SUPPLEMENT AND, IF GIVEN OR MADE, SUCH INFORMATION
OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED. THIS
 
                                        2
<PAGE>   12
 
PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO
BUY ANY SECURITIES OTHER THAN THE REGISTERED SECURITIES TO WHICH IT RELATES OR
AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY SUCH SECURITIES IN ANY
JURISDICTION TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR
SOLICITATION IN SUCH JURISDICTION. NEITHER THE DELIVERY OF THIS PROSPECTUS OR
THE PROSPECTUS SUPPLEMENT NOR ANY SALE MADE HEREUNDER OR THEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THEREOF OR THAT THE INFORMATION
CONTAINED OR INCORPORATED BY REFERENCE HEREIN OR THEREIN IS CORRECT AS OF ANY
TIME SUBSEQUENT TO ITS DATE.
 
                                        3
<PAGE>   13
 
                                  THE COMPANY
 
     MichCon is a Michigan corporation that was organized in 1898 and, with its
predecessors, has been in business for nearly 150 years. The Company is a public
utility engaged in the distribution and transmission of natural gas in the State
of Michigan. The Company serves 1.2 million residential, commercial and
industrial customers in more than 500 communities throughout Michigan with gas
sales and transportation markets of approximately 700 billion cubic feet (Bcf).
MichCon is a wholly-owned subsidiary of MCN Corporation, a Michigan corporation.
 
     At December 31, 1995, MichCon and its subsidiaries employed 3,128 persons.
 
     The mailing address of MichCon's principal executive office is 500 Griswold
Street, Detroit, Michigan 48226, and its telephone number is (313) 965-2430.
 
                                USE OF PROCEEDS
 
     Except as otherwise stated in the applicable Prospectus Supplement, net
proceeds from the sale of the New Bonds offered hereby will be used for the
acquisition of property; the construction, completion, extension or improvement
of facilities; working capital requirements; the improvement or maintenance of
service; the discharge or lawful retirement of short or long-term debt and
borrowings made or expected to be made; and for other corporate purposes.
Specific allocations of proceeds for such purposes have not been made at this
time. Funds may be borrowed in anticipation of future requirements.
 
                       RATIO OF EARNINGS TO FIXED CHARGES
 
     The following table sets forth MichCon's earnings to fixed charges for the
periods indicated.
 
<TABLE>
<CAPTION>
                                                   TWELVE MONTHS
                                                       ENDED           YEAR ENDED DECEMBER 31,
                                                   SEPTEMBER 30,   --------------------------------
                                                       1996        1995   1994   1993   1992   1991
                                                   -------------   ----   ----   ----   ----   ----
<S>                                                <C>             <C>    <C>    <C>    <C>    <C>
Ratio of Earnings to Fixed Charges(1)(2).........      3.62        3.47   3.26   3.58   2.99   2.53
</TABLE>
 
- -------------------------
(1) The Company is a guarantor of certain other debt. Fixed charges related to
    such debt, deemed to be immaterial, have been excluded in computing the
    above ratios.
 
(2) For the purpose of computing these ratios, earnings consists of net income
    plus income taxes and fixed charges. Fixed charges consist of total
    interest, amortization of debt discount, premium and expense and the
    estimated portion of interest implicit in rentals.
 
                          DESCRIPTION OF THE NEW BONDS
 
     The following description sets forth certain general terms and provisions
of the New Bonds to which any Prospectus Supplement will relate. The particular
terms of the New Bonds offered by any Prospectus Supplement will be described in
such Prospectus Supplement. The statements made herein are a summary only, do
not purport to be complete, and are subject to the detailed provisions of the
Twenty-ninth Supplemental Indenture dated as of July 15, 1989 providing for the
restatement of the Indenture of Mortgage and Deed of Trust dated as of March 1,
1944 which became effective on April 1, 1994 upon the retirement of all bonds
issued prior to March 1, 1987 and upon the filing of the required certificates
with the Trustee by the Company, as supplemented and amended by the supplemental
indentures thereto (collectively, the "Indenture"). The bonds of all series
issued, or which may be issued, under the Indenture are hereinafter referred to
as the "Bonds".
 
     This summary incorporates by reference certain Articles and Sections of the
Indenture and is qualified in its entirety by such reference. Terms defined in
the Indenture are used in this summary without definition.
 
                                        4
<PAGE>   14
 
GENERAL
 
     The First Mortgage Bonds designated as Secured Medium-Term Notes, Series C
will constitute a new series of Bonds under the Indenture. There are five series
of Bonds currently outstanding under the Indenture. The Trustees under the
Indenture are Citibank, N.A., New York, N.Y. (the "Trustee") and Robert T.
Kirchner (collectively, the "Trustees").
 
     The New Bonds will be offered on a continuing basis and will mature nine
months or more from the Issue Date (hereinafter defined) as selected by the
purchaser and agreed to by MichCon. Each New Bond will bear interest at a fixed
or variable rate selected by the purchaser and agreed to by MichCon.
 
     Reference is made to the applicable Prospectus Supplement for the following
terms of the New Bonds: (1) the specific designation and series of such New
Bonds; (2) the purchase price of such New Bonds (the "Issue Price"), which may
be expressed as a percentage of the principal amount at which such New Bonds
will be issued; (3) the date on which such New Bonds will be issued (the "Issue
Date"); (4) the date or dates on which the principal of such New Bonds will be
payable (the "Maturity Date"); (5) the rate(s) per annum at which such New Bonds
will bear interest (the "Interest Rate") if any, or the method of determination
of such rate; (6) the date from which any such interest shall accrue; (7) the
terms of redemption, if any; and (8) any other terms of such New Bonds not
inconsistent with the provisions of the Indenture.
 
     The New Bonds will be issued as fully registered bonds without coupons. If
so provided in the Prospectus Supplement, the Company may provide for the
issuance of uncertificated bonds in addition to or in place of certificated
bonds. The New Bonds will be exchangeable by holders for New Bonds of the same
aggregate principal amount, but of different authorized denomination or
denominations, which have the same Issue Date, Maturity Date, Interest Rate, and
redemption provisions, if any. Such exchanges are to be made without service
charge (other than any stamp tax or other governmental charge).
 
SECURITY AND PRIORITY
 
     The Indenture constitutes a first mortgage lien (subject to exceptions and
reservations set forth therein, to "permissible encumbrances", and to various
matters specified under "Business; Franchises" and "Properties" in MichCon's
Form 10-K) upon substantially all of the fixed property and franchises of
MichCon, consisting principally of gas distribution and transmission lines and
systems, underground storage fields and buildings, including property of the
character initially mortgaged which has been or may be acquired by MichCon
subsequent to the execution and delivery of the Indenture. It prohibits creation
of prior liens upon the mortgaged property, other than "permissible
encumbrances", but, within specified limitations in certain cases, property may
be acquired subject to preexisting liens or purchase money and other liens
created at the time or in connection with the acquisition of such property. The
property excepted from the lien of the Indenture consists principally of cash
(unless deposited with the Trustee under the Indenture), accounts receivable,
gas stored in reservoirs except to the extent specially pledged, materials and
supplies, securities, vehicles and leases. (Granting Clauses, Part II, Article I
and Section 5.08, 5.10 and 5.11.)
 
     The Indenture does not contain any debt covenants or provisions which would
afford bondholders protection in the event of a highly leveraged transaction.
 
     The New Bonds will rank equally and ratably (except as to sinking fund and
other analogous funds established for the exclusive benefit of a particular
series) with all Bonds, regardless of series, from time to time issued and
outstanding under the Indenture.
 
RELEASE OF PROPERTY
 
     Unless an event of default shall have occurred and be continuing, the
Company is entitled to possess, use and enjoy all the property and
appurtenances, franchise and rights conveyed by the Indenture. Subject to
various limitations and requirements, the Company may obtain a release of any
part of the mortgaged property, except prior lien bonds, upon receipt by the
Trustee of cash, as adjusted, equal to the consideration, if any, received or to
be received from the sale, surrender or other disposition of the property to be
released or the then fair value thereof (which ever shall be greater). (Article
VII.)
 
                                        5
<PAGE>   15
 
ISSUANCE OF ADDITIONAL BONDS
 
     Additional Bonds may be issued under the Indenture in principal amounts
(unlimited except as provided by law) equal to:
 
          (1) 70% of the cost or fair value to the Company, whichever is less,
     of unbonded net property additions made after December 31, 1943 (subject to
     deductions in certain cases, if such net property additions secure prior
     lien bonds); and
 
          (2) the sum of the principal amount of Bonds previously issued under
     the Indenture, and of prior lien bonds theretofore deducted under the
     Indenture, which have been retired or are then being retired and have not
     theretofore been bonded; and
 
          (3) the amount of cash deposited with the Trustee for such purpose.
 
     Bonds may be issued on the basis of net property additions which include
substantially all utility property subject to the Indenture (Part II, Article
III) or deposit of cash only if net earnings available for interest and
depreciation (before deduction for income taxes) for any specified 12
consecutive calendar months within the preceding 15 months equal 2 1/2 times
annual interest charges on the Bonds and any prior lien bonds. Such earnings
requirement need not be met where Bonds are to be issued against Bonds or prior
lien bonds which have been or are being retired as described in (2) above if the
Bonds to be issued bear interest at a lower rate than the Bonds or prior lien
bonds which have been or are to be retired, or if the proceeds from the Bonds to
be issued are used to refund Bonds or prior lien bonds which have been retired
within two years prior to such issuance unless additional Bonds requiring an
earnings certificate have been issued in the period between the retirement of
the retired Bonds and the issuance of the New Bonds.
 
     As of September 30, 1996, MichCon had approximately $1.079 billion of
unbonded net property additions, which would entitle it to issue approximately
$755 million principal amount of additional Bonds on the basis of unbonded net
property additions as discussed under (1) in the second preceding paragraph, and
had further additional capacity to issue $5 million principal amount of New
Bonds on the basis of Bonds previously issued under the Indenture, which have
been retired and have not theretofore been bonded as discussed under (2) in the
second preceding paragraph. The New Bonds will be issued upon the basis of 70%
of the cost or fair value of unbonded net property additions as discussed under
(1) in the second preceding paragraph, upon the basis of retired Bonds, as
discussed under (2) in the second preceding paragraph and/or cash deposited with
the Trustee for such purpose, as discussed under (3) in the second preceding
paragraph.
 
WITHDRAWAL OF CERTAIN CASH
 
     Cash deposited with the Trustee as a basis for the issuance of additional
Bonds may be withdrawn by MichCon in amounts described in (1) and (2) under
"Issuance of Additional Bonds". (Part II, Section 8.01.)
 
DEFEASANCE
 
     The Company may require the discharge of the Indenture or treat a series of
Bonds as no longer outstanding thereunder if: (1) the Company deposits with the
Trustee monies or certain obligations of the United States of America or certain
securities which are guaranteed by, or backed by obligations of, the United
States of America, in an amount sufficient to pay, when due, the principal,
premium if any, and any interest due and to become due; and (2) the Company
delivers an opinion of counsel to the effect that registration is not required
under the Investment Company Act of 1940, applicable laws are not violated, and
such discharge will not result in a taxable event with respect to the Bonds the
payment of which is being provided for. In such event, the obligation of the
Company duly and punctually to pay and cause to be paid the principal, premium,
if any, and interest in respect of such Bonds shall be completely discharged.
Thereafter, the holders of such Bonds shall be entitled to payment only out of
funds on deposit with the Trustee as aforesaid for their payment. (Part II,
Article XVI.)
 
                                        6
<PAGE>   16
 
MODIFICATION OF INDENTURE
 
     In general, modifications or alterations of the Indenture and of the rights
or obligations of the Company and of the bondholders, as well as waivers of
compliance with the Indenture, may be made with the consent of holders of 60% of
the Bonds, or, if less than all series of Bonds are adversely affected, the
consent of the holders of 60% of the Bonds adversely affected. No such
modification, alteration or waiver may be made which will (1) permit the
extension of the time or times of payment of the principal of, or the interest
or the premium (if any) on, any Bond, or a reduction in the rate of interest
thereon, or otherwise affect the terms of payment of the principal of, or the
interest or the premium (if any) on, any Bond, or affect the right of any
bondholder to institute suit for the enforcement of any such payment on or after
the due date thereof, (2) otherwise than as permitted by the Indenture, permit
the creation of any lien ranking prior or equal to the lien of the Indenture
with respect to any of the mortgaged properties or (3) permit the reduction of
the percentage of Bonds required for the making of any such modification,
alteration or waiver. (Part II, Article XIV.)
 
CONCERNING THE TRUSTEES
 
     The Trustee (Citibank, N.A.) has acted as paying agent on the outstanding
Bonds and will act in the same capacity with respect to the New Bonds. It is
also a depositary of funds of the Company. Robert T. Kirchner is Individual
Trustee. Mr. Kirchner is an Officer of Citibank, N.A.
 
DEFAULT AND NOTICE THEREOF TO BONDHOLDERS
 
     The Indenture provides that, in case of an event of default as defined
therein, the Trustee or the holders of not less than 25% in principal amount of
the Bonds may declare the principal and all accrued and unpaid interest of all
Bonds, if not already due, to be immediately due and payable. The Trustee, upon
request of the holders of a majority in principal amount of the outstanding
Bonds, shall waive such default and rescind any such declaration if such default
is cured. The holders of a majority in principal amount of the Bonds shall have
the right to direct the time, method and place of conducting any proceeding for
any remedy available to the Trustees and of exercising any power or trust
conferred upon the Trustees, but under certain circumstances, the Trustees may
decline to follow such directions or to exercise certain of their powers.
 
     Bondholders have no right to enforce any remedy under the Indenture unless
the Trustees have first had a reasonable opportunity to do so following notice
of default to the Trustee and request by the holders of 25% in principal amount
of the Bonds for action by the Trustees with offer of indemnity satisfactory to
the Trustees against cost, expenses and liabilities that may be incurred
thereby, but this provision does not impair the absolute right of any bondholder
to enforce payment of the principal of and interest on his Bond when due. (Part
II, Article IX.)
 
     The Indenture provides that the following shall constitute events of
default: failure to pay any installment of interest on any Bond when due and
payable, and continuance of such failure for 60 days; failure to pay the
principal of any Bond when due and payable, whether at maturity, in connection
with any sinking fund payment, or otherwise; failure to pay any installment of
interest on any prior lien bonds, and continuance of such failure for the period
of grace, if any, specified in the prior lien securing such bonds; failure to
pay any installment applied to the purchase or redemption of any Bond, and
continuance of such failure for 60 days; failure to pay the principal of any
prior lien bond when due and payable, whether at maturity or otherwise; failure
on the part of the Company to perform or observe any other covenant, agreement
or condition contained in the Indenture or in the Bonds or any prior lien bonds,
continuance of such failure for 90 days after written notice to the Company by
the Trustee or by the holders of not less than 25% in principal amount of the
Bonds; and insolvency or bankruptcy, receivership or similar proceedings
initiated by the Company, or initiated against the Company and not dismissed or
stayed within 45 days; and failure to renew or extend its corporate charter upon
or prior to the expiration of such under the provision of its Articles of
Incorporation or of law.
 
     The Indenture provides that the Trustees shall give to the bondholders
notice of the happening of a default known to them within 90 days after the
occurrence thereof (disregarding any period of grace in the
 
                                        7
<PAGE>   17
 
defaults referred to above) unless such default shall have been cured, but
except in case of default in the payment of principal, premium, if any, or
interest on the Bonds or in the payment of any sinking fund installment, the
Trustees may withhold such notice if and so long as the board of directors, the
executive committee or a trust committee of directors or responsible officers of
the Trustee in good faith determine that the withholding of such notice is in
the interest of the bondholders. (Part II, Sections 9.01 and 12.03.)
 
BOOK-ENTRY NOTES
 
     The New Bonds may be issued in whole or in part in the form of one or more
Global Securities (as such term is defined below) that will be deposited with,
or on behalf of, a Depositary ("Depositary") or its nominee identified in the
applicable Prospectus Supplement. In such a case, one or more Global Securities
will be issued in a denomination or aggregate denomination equal to the portion
of the aggregate principal amount of outstanding New Bonds to be represented by
such Global Security or Global Securities. Unless and until it is exchanged in
whole or in part for New Bonds in registered form, a Global Security may not be
registered for transfer or exchange except as a whole by the Depositary for such
Global Security to a nominee of such Depositary or by a nominee of such
Depositary to such Depositary or another nominee of such Depositary or by such
Depositary or any nominee to a successor Depositary or a nominee of such
successor Depositary and except in the circumstances described in the applicable
Prospectus Supplement. The term "Global Security", when used with respect to any
New Bonds, means a New Bond that is executed by the Company and authenticated
and delivered by the Trustee to the Depositary or pursuant to the Depositary's
instruction, which shall be registered in the name of the Depositary or its
nominee and which shall represent, and shall be denominated in an amount equal
to the aggregate principal amount of, all of the outstanding New Bonds or any
portion thereof, in either case having the same terms, including, without
limitation, the same original issue date, date or dates on which principal is
due, and interest rate or method of determining interest.
 
     The specific terms of the depositary arrangement with respect to any
portion of New Bonds to be represented by a Global Security will be described in
the applicable Prospectus Supplement. The Company expects that the following
provisions will apply to depositary arrangements.
 
     Unless otherwise specified in the applicable Prospectus Supplement, New
Bonds which are to be represented by a Global Security to be deposited with or
on behalf of a Depositary will be represented by a Global Security registered in
the name of such Depositary or its nominee. Upon the issuance of such Global
Security, and the deposit of such Global Security with or on behalf of the
Depositary for such Global Security, the Depositary will credit, on its
book-entry registration and transfer system, the respective principal amounts of
the New Bonds represented by such Global Security to the accounts of
institutions that have accounts with such Depositary or its nominee
("participants"). The accounts to be credited will be designated by the
underwriters or agents of such New Bonds or, if such New Bonds are offered and
sold directly by the Company, by the Company. Ownership of beneficial interests
in such Global Security will be limited to participants or persons that may hold
interests through participants. Ownership of beneficial interests by
participants in such Global Security will be shown on, and the transfer of that
ownership interest will be effected only through, records maintained by the
Depositary or its nominee for such Global Security. Ownership of beneficial
interests in such Global Security by persons that hold through participants will
be shown on, and the transfer of that ownership interest within such participant
will be effected only through, records maintained by such participant. The laws
of some jurisdictions require that certain purchasers of securities take
physical delivery of such securities in certificated form. The foregoing
limitations and such laws may impair the ability to transfer beneficial
interests in such Global Security.
 
     So long as the Depositary for a Global Security, or its nominee, is the
registered owner of such Global Security, such Depositary or such nominee, as
the case may be, will be considered the sole owner or holder of the Securities
represented by such Global Security for all purposes under the Indenture. Unless
otherwise specified in the applicable Prospectus Statement, owners of beneficial
interests in such Global Security will not be entitled to have New Bonds
represented by such Global Security registered in their names, will not receive
or be entitled to receive physical delivery of New Bonds in certificated form
and will not be considered the holders thereof for any purposes under the
Indenture. Accordingly, each person owning a beneficial interest in such Global
Security must rely on the procedures of the Depositary and, if such person is
not a
 
                                        8
<PAGE>   18
 
participant, on the procedures of the participant through which such person owns
its interest, to exercise any rights of a holder under the Indenture. The
Company understands that under existing industry practices, if the Company
requests any action of holders or an owner of a beneficial interest in such
Global Security desires to give any notice or take any action a holder is
entitled to give or take under the Indenture, the Depositary would authorize the
participants to give such notice or take such action, and participants would
authorize beneficial owners owning through such participants to give such notice
or take such action or would otherwise act upon the instructions of beneficial
owners owning through them.
 
     Principal of and any premium and interest on a Global Security will be
payable in the manner described in the applicable Prospectus Supplement.
 
                             VALIDITY OF SECURITIES
 
     The validity of the New Bonds offered hereby will be passed upon for the
Company by Susan K. McNish, Vice President, General Counsel and Secretary of
MichCon and for any agents or underwriters by LeBoeuf, Lamb, Greene & MacRae,
L.L.P., a limited liability partnership including professional corporations, 125
West 55th Street, New York, New York. LeBoeuf, Lamb, Greene & MacRae, L.L.P.
from time to time renders legal services to MichCon.
 
                                    EXPERTS
 
     The consolidated financial statements and related financial statement
schedule incorporated in this prospectus by reference from MichCon's Annual
Report on Form 10-K for the year ended December 31, 1995 have been audited by
Deloitte & Touche LLP, independent auditors, as stated in their report, which is
incorporated herein by reference and have been so incorporated in reliance upon
the report of such firm given upon their authority as experts in accounting and
auditing.
 
                              PLAN OF DISTRIBUTION
 
     The Company may sell any series of the New Bonds (i) to or through
underwriters; (ii) to or through dealers; (iii) directly to purchasers; or (iv)
through agents. A Prospectus Supplement will set forth the terms of the offering
of the New Bonds; including the name or names of any underwriters, dealers or
agents, the purchase price of such New Bonds and the proceeds to the Company
from such sale, any underwriting discounts 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 any
securities exchange on which such New Bonds may be listed. Any initial public
offering price and any discounts or concessions allowed or reallowed or paid to
dealers may be changed from time to time. Only firms named in the Prospectus
Supplement or a related pricing supplement, if applicable, will be deemed to be
underwriters, dealers or agents in connection with the New Bonds offered
thereby, and if any of the firms expressly referred to below is not named in
such Prospectus Supplement or a related pricing supplement, then such firm will
not be a party to the underwriting or distribution agreement in respect of such
New Bonds, will not be purchasing any such New Bonds from the Company and will
have no direct or indirect participation in the underwriting or other
distribution of such New Bonds, although it may participate in the distribution
of such New Bonds under circumstances entitling it to a dealer's commission.
 
     If underwriters are used in the sale, the New Bonds will be acquired by the
underwriters for their own account and may be resold from time to time 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 New Bonds may be
offered to the public either through underwriting syndicates represented by one
or more managing underwriters (which may include Merrill Lynch & Co. (Merrill
Lynch, Pierce, Fenner & Smith Incorporated), or such other underwriter or
underwriters as may be designated by the Company) or directly by one or more
underwriters. The underwriter or underwriters with respect to a particular
underwritten offering of New Bonds will be named in the Prospectus relating to
such offering and, if an underwriting syndicate is used, the managing
underwriter or underwriters will be set forth on the cover of such Prospectus
Supplement. Unless
 
                                        9
<PAGE>   19
 
otherwise set forth in the Prospectus Supplement, the obligations of the
underwriters to purchase the New Bonds offered thereby will be subject to
certain conditions precedent, and the underwriters will be obligated to purchase
all of such New Bonds if any are purchased.
 
     The New Bonds may be sold directly by the Company or through agents
designated by the Company, from time to time. The Prospectus Supplement will set
forth the name of any agent involved in the offer or sale of the New Bonds in
respect of which the Prospectus Supplement is delivered and any commissions
payable by the Company to such agent. Unless otherwise indicated in the
Prospectus Supplement, any such agent will be acting on a best efforts basis for
the period of its appointment.
 
     The New Bonds may be sold directly by the Company to investors or others
who may be deemed to be underwriters within the meaning of the Securities Act
with respect to any resale thereof. The terms of any such sales will be
described in the Prospectus Supplement relating thereto.
 
     If so indicated in the Prospectus Supplement, the Company will authorize
agents, underwriters or dealers to solicit offers from certain types of
institutions to purchase the New Bonds from the Company at the public offering
price set forth in the Prospectus Supplement pursuant to delayed delivery
contracts providing for payment and delivery on a specified date in the future.
Such contracts will be subject only to those conditions set forth in the
Prospectus Supplement, and the Prospectus Supplement will set forth the
commission payable for solicitation of such contracts.
 
     Underwriters, dealers and agents may be entitled under agreements entered
into with the Company, to indemnification by the Company against certain civil
liabilities, including liabilities under the Securities Act, or to contribution
with respect to payments which such underwriters, dealers or agents may be
required to make in respect thereof. Underwriters, dealers and agents may engage
in transactions with, or perform services for the Company in the ordinary course
of business.
 
     The New Bonds may or may not be listed on a national securities exchange.
No assurance can be given that there will be a market for the New Bonds.
 
                                       10
<PAGE>   20
 
          ============================================================
 
  NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED OR
INCORPORATED BY REFERENCE IN THIS PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS SUPPLEMENT AND
THE ACCOMPANYING PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY
OR THE UNDERWRITERS. NEITHER THE DELIVERY OF THIS PROSPECTUS SUPPLEMENT AND THE
ACCOMPANYING PROSPECTUS NOR ANY SALE MADE HEREUNDER AND THEREUNDER SHALL, UNDER
ANY CIRCUMSTANCE, CREATE AN IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF. THIS PROSPECTUS SUPPLEMENT AND THE
ACCOMPANYING PROSPECTUS DO NOT CONSTITUTE AN OFFER OR SOLICITATION BY ANYONE IN
ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED OR IN
WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR
TO ANYONE TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION.
                               ------------------
 
                               TABLE OF CONTENTS
 
                             PROSPECTUS SUPPLEMENT
 
<TABLE>
<CAPTION>
                                              PAGE
                                              ----
<S>                                           <C>
Summary.....................................   S-3
Consolidated Financial Information..........   S-4
Capitalization at March 31, 1997............   S-4
Use of Proceeds.............................   S-5
Description of the Offered Bonds............   S-5
Underwriting................................   S-8
Legal Opinions..............................   S-9
 
PROSPECTUS
Available Information.......................     2
Incorporation of Certain Documents by
  Reference.................................     2
The Company.................................     4
Use of Proceeds.............................     4
Ratio of Earnings to Fixed Charges..........     4
Description of the New Bonds................     4
Validity of Securities......................     9
Experts.....................................     9
Plan of Distribution........................     9
</TABLE>
 
          ============================================================
 
          ============================================================
 
                                  $30,000,000
 
                       MICHIGAN CONSOLIDATED GAS COMPANY
 
                             FIRST MORTGAGE BONDS,
                                 DESIGNATED AS
                           % SECURED MEDIUM-TERM NOTES,
                           SERIES C, DUE MAY 1, 2007
 
                          ---------------------------
                             PROSPECTUS SUPPLEMENT
                          ---------------------------
 
                             ROBERT W. BAIRD & CO.
                                  INCORPORATED
                         FIRST OF MICHIGAN CORPORATION
                                  RONEY & CO.
 
                                  May   , 1997
 
          ============================================================


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