As filed with the Securities and Exchange Commission on June 17, 1997.
                                                      Registration No. 333-_____

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

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                ----------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      under
                           The Securities Act of 1933

                             -----------------------
                               IES UTILITIES INC.
             (Exact Name of Registrant as Specified in Its Charter)

              IOWA                                     42-0331370
(State or Other Jurisdiction of          (I.R.S. Employer Identification Number)
 Incorporation or Organization)
                                    IES Tower
                              200 First Street S.E.
                            Cedar Rapids, Iowa 52401
                                 (319) 398-4411
         (Address, Including Zip Code, and Telephone Number, Including
             Area Code, of Registrant's Principal Executive Offices)

                             -----------------------
                              Stephen W. Southwick
                   Vice President, General Counsel & Secretary
                               IES Utilities Inc.
                              200 First Street S.E.
                            Cedar Rapids, Iowa 52401
                                 (319) 398-8147
       (Name, Address, Including Zip Code, and Telephone Number, Including
                        Area Code, of Agent For Service)

         It is  respectfully  requested that the  Commission  send copies of all
notices, orders and communications to:
                                Richard L. Harden
                       Winthrop, Stimson, Putnam & Roberts
                             One Battery Park Plaza
                             New York, NY 10004-1490
                                 (212) 858-1228

                             -----------------------
         Approximate  date of commencement of proposed sale of securities to the
public: From time to time after this Registration Statement becomes effective.

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

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

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

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





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



                                          CALCULATION OF REGISTRATION FEE

- ----------------------- -------------------- ------------------------- ------------------------ ---------------------
                                                 Proposed Maximum         Proposed Maximum
 Title of Securities         Amount to           Aggregate Price         Aggregate Offering          Amount of
   to be Registered        Be Registered           Per Unit <F1>              Price <F1>        Registration Fee <F1>
- ----------------------- -------------------- ------------------------- ------------------------ ---------------------
- ----------------------- -------------------- ------------------------- ------------------------ =====================

                                                                                          
   Debt Securities          $50,000,000                100%                  $50,000,000              $15,152
- ----------------------- -------------------- ------------------------- ------------------------ =====================
<FN>
<F1>     Estimated  solely  for the  purpose  of  calculating  the amount of the
         registration fee.
</FN>



Pursuant to Rule 429 under the Securities  Act of 1933,  the  Prospectus  herein
also relates to $85,000,000  principal  amount of Debt Securities  registered in
Registration  Statement No.  33-62259,  for which a $29,310  filing fee was paid
upon the filing of such Registration Statement.

The registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933  or  until  the  Registration  Statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.





================================================================================
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.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there by 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.
================================================================================






PROSPECTUS

                   Subject to Completion, Dated June 17, 1997

                                  $135,000,000

                               IES UTILITIES INC.

                                 DEBT SECURITIES



         IES Utilities  Inc. (the  "Company")  may from time to time issue up to
$135,000,000   aggregate  principal  amount  of  its  various  debt  securities,
including   Collateral   Trust   Bonds  and   Junior   Subordinated   Debentures
(collectively referred to as "Securities"), in one or more series, at prices and
on terms to be  determined at the time of sale.  The terms of the  Securities in
respect  of  which  this  Prospectus  is  being  delivered,   including,   where
applicable,  the series  designation,  the principal  amount of the series,  the
maturity,  the rate and time of payment of interest, the initial public offering
price, the provisions for redemption and other provisions,  will be set forth in
one or more Prospectus  Supplements (each a "Prospectus  Supplement"),  together
with the terms of offering of the Securities.

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

    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 Securities may be sold by the Company through underwriters, dealers
or agents, or directly to one or more purchasers  pursuant to terms fixed at the
time of  sale.  The  Prospectus  Supplement  will  set  forth  the  names of the
underwriters,   dealers  or  agents,  if  any,  any  applicable  commissions  or
discounts,  and the net proceeds to the Company from any such sale. See "Plan of
Distribution"  for  possible  indemnification   arrangements  for  underwriters,
dealers or agents.




                The date of this Prospectus is ___________, 1997.




                              AVAILABLE INFORMATION

         The  Company  is  subject  to  the  informational  requirements  of the
Securities  Exchange  Act of 1934,  as  amended  (the  "Exchange  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 public reference facilities maintained by the SEC at
Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington,  D.C. 20549; and
at the SEC's regional offices located at 1400 Citicorp Center,  500 West Madison
Street,  Chicago,  Illinois 60601 and Seven World Trade Center,  Suite 1300, New
York,  New York 10048.  Copies of such  materials  can be obtained at prescribed
rates from the Public  Reference  Section of the SEC at 450 Fifth Street,  N.W.,
Washington,  D.C. 20549. The SEC maintains a Web site  (http://www.sec.gov) that
contains  reports,  proxy  and  information  statements  and  other  information
regarding  registrants that file electronically with the SEC. In addition,  such
reports and other  information  concerning  the Company can be  inspected at the
principal  office of the  Company,  200 First Street S.E.,  Cedar  Rapids,  Iowa
52401.

         The Company has filed with the SEC a registration statement on Form S-3
(herein   together  with  all  amendments  and  exhibits   referred  to  as  the
"Registration  Statement")  under the  Securities  Act of 1933,  as amended (the
"Securities  Act"),  with  respect  to  the  Securities  offered  hereby.   This
Prospectus does not contain all of the information set forth in the Registration
Statement,  certain parts of which are omitted in accordance  with the rules and
regulations  of the  SEC.  For  further  information,  reference  is made to the
Registration Statement and to the exhibits and schedules filed therewith,  which
may be inspected  without  charge at the office of the SEC at 450 Fifth  Street,
N.W., Washington, D.C. 20549. Copies of such documents may also be obtained from
the SEC at prescribed rates.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         The following  documents  filed by the Company with the SEC pursuant to
the Exchange Act are incorporated in this Prospectus by reference:

         1.       The  Company's  Annual  Report on Form 10-K for the year ended
                  December 31, 1996;

         2.       The  Company's  Quarterly  Report on Form 10-Q for the quarter
                  ended March 31, 1997; and

         3.       The Company's Current Report on Form 8-K dated April 28, 1997.

         All  reports  and other  documents  subsequently  filed by the  Company
pursuant  to  Sections  13,  14 or  15(d)  of  the  Exchange  Act  prior  to the
termination of the offering of the Securities shall be deemed to be incorporated
by reference in this  Prospectus and to be a part hereof from the date of filing
such documents;  provided, however, that documents filed by the Company pursuant
to Sections  13, 14 or 15(d) of the  Exchange Act prior to the end of the fiscal
year covered by the most recent  Annual Report on Form 10-K of the Company shall
not be deemed to be incorporated herein by reference or to be a part hereof from
and after the date of the  filing  of such  Annual  Reports  on Form  10-K.  The
documents  incorporated herein by reference are sometimes hereinafter called the
"Incorporated  Documents." Any statement  contained herein or in an Incorporated
Document  shall be deemed to be  modified  or  superseded  for  purposes of this
Prospectus  to the extent that a statement  contained  herein or in a Prospectus
Supplement  or in any  subsequently  filed  Incorporated  Document  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.

         The  information  relating to the Company  contained in this Prospectus
summarizes,  is based upon, or refers to,  information and financial  statements
contained in one or more Incorporated Documents;  accordingly,  such information
contained  herein is qualified  in its  entirety by  reference  to  Incorporated
Documents and should be read in conjunction therewith.

         The Company will provide  without charge to each person,  including any
beneficial owner, to whom a copy of this Prospectus has been delivered, upon the
written or oral request of such person, a copy of any or all of the Incorporated
Documents  (not including  exhibits to such  documents  unless such exhibits are
specifically  incorporated by reference into such documents).  Requests for such
copies  should  be  directed  to  William  Jurgensen,  Director  of  Shareholder
Services,  IES Industries Inc., 200 First Street S.E., Cedar Rapids, Iowa 52401,
telephone (319) 398-7755.


                                       2





         No  person  has been  authorized  to give any  information  or make any
representation  not  contained  in  this  Prospectus  or,  with  respect  to any
Security,  the Prospectus  Supplement  relating thereto,  and, if given or made,
such  information  or  representation  must not be relied  upon as  having  been
authorized by the Company or any underwriter. This Prospectus and any Prospectus
Supplement do not constitute an offer to sell or a  solicitation  of an offer to
buy any of the securities  offered hereby in any  jurisdiction  to any person to
whom it is  unlawful  to make  such  offer  in such  jurisdiction.  Neither  the
delivery  of this  Prospectus  and a  Prospectus  Supplement  nor any sale  made
thereunder shall, under any circumstances, create any implication that there has
been no change in the affairs of the Company  since the date of that  Prospectus
Supplement.

                                TABLE OF CONTENTS

AVAILABLE INFORMATION                                                        2

INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE                              2

THE COMPANY                                                                  3

THE MERGER                                                                   4

USE OF PROCEEDS                                                              4

SELECTED CONSOLIDATED FINANCIAL INFORMATION                                  5

PLAN OF DISTRIBUTION                                                         6

DESCRIPTION OF THE COLLATERAL TRUST BONDS                                    6

DESCRIPTION OF THE 1940 INDENTURE                                           17

DESCRIPTION OF THE ISU 1923 INDENTURE                                       23

DESCRIPTION OF THE SUBORDINATED INDENTURE                                   27

GLOBAL SECURITIES                                                           39

EXPERTS                                                                     39

LEGAL MATTERS                                                               39


                                   THE COMPANY

         The Company was incorporated under the laws of the State of Iowa on May
25,  1925.  The Company is a public  utility  operating  company with all of its
operations  in the  State  of  Iowa  and  is a  wholly-owned  subsidiary  of IES
Industries Inc. ("Industries"), a public utility holding company. The Company is
the  surviving  corporation  following  the merger on December  31, 1993 of Iowa
Southern  Utilities  Company  ("Iowa  Southern"  or  "ISU")  with and into  Iowa
Electric  Light  and  Power  Company  ("IE").  The  surviving   corporation  was
subsequently renamed IES Utilities Inc.


                                       3





         The Company supplies  electric energy and natural gas to a service area
with an estimated population of approximately one million. For the twelve months
ended March 31, 1997, the Company derived approximately 75% of its revenues from
the sale of electric energy,  approximately 22% from the sale of natural gas and
approximately  3% from the sale of steam gas.  At March 31,  1997,  the  Company
provided service to approximately 336,000 electric,  176,000 natural gas and 226
steam  retail  customers  as well as 30 resale  customers  in more than 550 Iowa
communities.  The Company's principal executive offices are located at 200 First
Street S.E., Cedar Rapids, Iowa 52401, telephone (319) 398-4411.

         Additional  information  concerning  the Company and its  operations is
contained in the Incorporated Documents, to which reference is hereby made.

                                   THE MERGER

         On November 10,  1995,  Industries,  WPL  Holdings,  Inc.  ("WPLH") and
Interstate  Power Company  ("IPC") entered into an Agreement and Plan of Merger,
as amended ("Merger Agreement"),  providing for: (a) IPC becoming a wholly-owned
subsidiary of WPLH, and (b) the merger of Industries  with and into WPLH,  which
merger will result in the combination of Industries and WPLH as a single holding
company  (collectively,  the "Proposed Merger"). The new holding company will be
named Interstate Energy  Corporation  ("Interstate  Energy") and Industries will
cease to exist. The Proposed Merger, which will be accounted for as a pooling of
interests and is intended to be tax-free for federal  income tax  purposes,  has
been  approved by the  respective  Boards of Directors and  shareholders.  It is
still subject to approval by several federal and state regulatory agencies.  The
companies  expect to receive  such  regulatory  approvals by the third or fourth
quarter of 1997.

         WPLH is a holding company headquartered in Madison,  Wisconsin,  and is
the parent company of Wisconsin  Power and Light Company  ("WP&L") and Heartland
Development  Corporation  ("HDC").  WP&L  supplies  electric  and gas service to
approximately 385,000 and 150,000 customers,  respectively, in south and central
Wisconsin. HDC and its principal subsidiaries are engaged in businesses in three
major areas:  environmental  engineering and consulting,  affordable housing and
energy  services.  IPC, an operating  public utility  headquartered  in Dubuque,
Iowa,  supplies  electric  and gas service to  approximately  165,000 and 49,000
customers,  respectively,  in northeast  Iowa,  northwest  Illinois and southern
Minnesota.

         Interstate Energy will be the parent company of Utilities, WP&L and IPC
and will be registered  under the Public Utility Holding Company Act of 1935, as
amended.  The Merger Agreement  provides that these operating  utility companies
will  continue  to operate as  separate  entities  for a minimum of three  years
beyond the effective date of the merger. In addition, the non-utility operations
of the Company and WPLH will be combined shortly after the effective date of the
merger  under one  entity to manage the  diversified  operations  of  Interstate
Energy.  The corporate  headquarters  of  Interstate  Energy will be in Madison,
Wisconsin.

         The Securities and Exchange Commission historically has interpreted the
1935 Act to preclude registered holding companies, with limited exceptions, from
owning both  electric  and gas utility  systems.  Although  the  Securities  and
Exchange Commission has recommended that registered holding companies be allowed
to hold both gas and electric  utility  operations if the affected states agree,
it remains possible that the Securities and Exchange Commission may require as a
condition to its approval of the Proposed Merger that the Company,  WPLH and IPC
divest their gas utility properties,  and possibly certain non-utility  ventures
of the Company and WPLH,  within a reasonable  time after the effective  date of
the Proposed Merger.

         Additional  information  concerning the Proposed Merger is contained in
the Incorporated Documents, to which reference is hereby made.

                                 USE OF PROCEEDS

         Except as otherwise provided in the applicable Prospectus Supplement or
a supplement thereto, the Company intends to use the net proceeds to be received
from the  issuance  and sale of the  Securities  offered  hereby  (i) to  reduce
short-term debt and (ii) for general corporate purposes.


                                       4







                   SELECTED CONSOLIDATED FINANCIAL INFORMATION
                  (In thousands, except percentages and ratios)

The  financial  data  presented  below  should be read in  conjunction  with the
Company's   consolidated  financial  statements  and  notes  thereto  which  are
incorporated by reference in this Prospectus.

                                          Twelve
                                       Months Ended                           Year Ended December 31,
                                      March 31, 1997       ----------------------------------------------------------
                                         (unaudited)       1996           1995         1994         1993         1992
                                          ---------        -----          ----         ----         ----         ----
                                                                                             
Income Summary:
     Operating revenues.............       $782,609       $754,979      $709,826     $685,366     $713,750     $610,262
     Operating income...............        152,110        153,725       142,265      135,591      143,329      100,361
     Net income.....................         61,452         63,729        59,278       61,210       67,970       45,291
     Dividend requirements on
       preferred stock..............            914            914           914          914          914        1,729
     Net income available for
       common stock<F1>.............         60,538         62,815        58,364       60,296       67,056       43,562

Cash dividends declared
          on common stock...........         48,000         44,000        43,000       52,000       31,300       24,721

Ratio of earnings to fixed
     charges<F2>....................           3.09           3.23          3.04         3.18         3.41         2.49

                                               March 31, 1997 (unaudited) <F3>
                                      -------------------------------------------------

                                                                         Percent of
                                            Actual                     Capitalization
                                            ------                     --------------
                                                                       
Capitalization Summary:
       Long-term debt<F4>...........       $525,529                          48.4%
       Preferred stock..............         18,320                           1.7%
       Common equity................        541,428                          49.9%
                                           --------                          -----
     Total..........................     $1,085,277                         100.0%
                                         ==========                         ======
- --------------------------------
<FN>

<F1>     All of the Company's common stock is owned by IES Industries Inc.

<F2>     For purposes of  computation  of these  ratios,  (a) earnings have been
         calculated  by adding fixed  charges and federal and state income taxes
         to net  income;  (b)  fixed  charges  consist  of  interest  (including
         amortization  of debt  expense,  premium and discount) on long-term and
         other debt, and the estimated interest component of rents.

<F3>     Does not  reflect  the  issuance  of the  Securities  or the use of the
         proceeds thereof.

<F4>     Includes $63,140,000 of current maturities.
</FN>



                                       5





                              PLAN OF DISTRIBUTION

         The Company may sell the  Securities in any of three ways:  (i) through
underwriters  or  dealers,  (ii)  directly to one or more  purchasers,  or (iii)
through agents. The applicable Prospectus Supplement will set forth the terms of
any  offering of the  Securities,  including  the names of any  underwriters  or
agents, the purchase price of such Securities,  the proceeds to the Company from
such sale, any underwriting discounts and other items constituting underwriters'
compensation,   the  initial  public  offering  price,   and  any  discounts  or
concessions allowed or reallowed or paid to dealers.

         If  underwriters  are used in the sale, the Securities 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.  Such
Securities may be offered to the public either through  underwriting  syndicates
represented by managing  underwriters  or by  underwriters  without a syndicate.
Unless  otherwise  set  forth  in  the  applicable  Prospectus  Supplement,  the
obligations of the  underwriters  to purchase such Securities will be subject to
certain conditions precedent, and the underwriters will be obligated to purchase
all of such  Securities if any of such  Securities  are  purchased.  The initial
public offering prices and any discounts or concessions  allowed or reallowed or
paid to dealers may be changed from time to time.

         The  Securities  may also be sold  directly  by the  Company or through
agents  designated by the Company from time to time.  Any agent  involved in the
offer or sale of the Securities will be named,  and any  commissions  payable by
the  Company  to such  agent will be set  forth,  in the  applicable  Prospectus
Supplement.  Unless otherwise indicated in the applicable Prospectus Supplement,
any such  agent  will act on a  reasonable  efforts  basis for the period of its
appointment.

         If so indicated in the applicable  Prospectus  Supplement,  the Company
will  authorize  agents,  underwriters,  or dealers to solicit offers by certain
specified  institutions  to purchase the Securities at the public offering price
set forth in such Prospectus  Supplement  pursuant to delayed delivery contracts
providing for payment and delivery on a future date specified in such Prospectus
Supplement or a supplement thereto. Such contracts will be subject only to those
conditions  set  forth  in  the  applicable  Prospectus  Supplement,   and  such
Prospectus Supplement will set forth the commissions payable for solicitation of
such contracts.

         Any underwriters,  dealers, or agents participating in the distribution
of the  Securities  may be  deemed  to be  underwriters,  and any  discounts  or
commissions  received  by them on the sale or  resale of the  Securities  may be
deemed to be underwriting  discounts and commissions,  under the Securities Act.
Agents and underwriters  may be entitled under agreements  entered into with the
Company to indemnification by the Company against certain liabilities, including
liabilities  under the Securities Act. Agents and  underwriters may be customers
of,  engage in  transactions  with,  or perform  services for the Company or its
affiliates in the ordinary course of business.


                    DESCRIPTION OF THE COLLATERAL TRUST BONDS

General

         If  the  Securities  are  issued  as  Collateral  Trust  Bonds,   those
Collateral  Trust Bonds will be issued in one or more series as fully registered
bonds, without coupons,  under an Indenture of Mortgage and Deed of Trust, dated
as of September 1, 1993 (the "Original  Mortgage"),  between the Company and The
First  National  Bank of Chicago,  as Trustee  (the  "Trustee"),  as amended and
supplemented.  As  used  herein,  the  term  "Bonds"  refers  to any  series  of
Collateral  Trust Bonds in respect of which this Prospectus is being  delivered.
The  Original  Mortgage  as amended  and  supplemented  by various  supplemental
indentures  including  one  or  more  supplemental  indentures  relating  to any
issuance  of  Collateral  Trust  Bonds,  is  hereinafter   referred  to  as  the
"Mortgage." The summaries  herein  concerning the Collateral  Trust Bonds do not
purport  to be  complete  and are  subject  to the  detailed  provisions  of the
Mortgage, a copy of which was previously filed with the Commission, is listed as
an exhibit to the Registration Statement of which this Prospectus is a part, and
is incorporated herein by reference. Capitalized terms used herein which are not
otherwise  defined in this Prospectus have the meanings  ascribed thereto in the
Mortgage.  Wherever  particular  provisions  of the  Mortgage  or terms  defined
therein are referred to, such  provisions or  definitions  are  incorporated  by
reference  as a part of the  statements  made  herein  and such  statements  are
qualified in their entirety by such reference. References to article and section
numbers  herein,  unless  otherwise  indicated,  are  references  to article and
section numbers of the Mortgage.


                                       6





         The Mortgage  provides  that,  in addition to  Collateral  Trust Bonds,
additional debt securities may be issued  thereunder,  without  limitation as to
the aggregate principal amount. (See "Issuance of Additional Securities" below.)
The Bonds will be secured equally and ratably with all other  securities  issued
under the Mortgage.

Terms of Specific Series of the Bonds

         Reference  is  made  to  the  applicable  Prospectus  Supplement,  or a
supplement  thereto,  for a description of the following terms of the Bonds: (i)
the title of such Bonds;  (ii) the limit,  if any, upon the aggregate  principal
amount of such  Bonds;  (iii) the date or dates on which the  principal  of such
Bonds is payable; (iv) the rate or rates at which such Bonds will bear interest,
if any; the date or dates from which such  interest  will  accrue;  the dates on
which such interest will be payable ("Interest Payment Dates");  and the regular
record dates for the interest  payable on such Interest  Payment Dates;  (v) the
option, if any, of the Company to redeem such Bonds and the periods within which
or the dates on which,  the  prices at which and the terms and  conditions  upon
which,  such Bonds may be  redeemed,  in whole or in part,  upon the exercise of
such option;  (vi) the obligation,  if any, of the Company to redeem or purchase
Bonds  pursuant to any sinking fund or analogous  provisions or at the option of
the Holder (as hereinafter defined) and the periods within which or the dates on
which,  the prices at which and the terms and conditions upon which,  such Bonds
will be redeemed,  in whole or in part,  pursuant to such obligation;  (vii) the
denominations  in which such Bonds will be issuable;  (viii)  whether such Bonds
are to be  issued  in whole or in part in the form of one or more  global  Bonds
and, if so, the identity of the depositary  for such global Bonds;  and (ix) any
other terms of such Bonds not inconsistent with the provisions of the Mortgage.

Payment of Bonds; Transfers; Exchanges

         Except as may be provided in the applicable Prospectus Supplement, or a
supplement  thereto,  interest,  if any, on each Bond  payable on each  Interest
Payment  Date will be paid to the person in whose  name such Bond is  registered
(the registered  holder of any Bond being  hereinafter  called a "Holder") as of
the close of  business  on the regular  record  date  relating to such  Interest
Payment Date; provided,  however,  that interest payable at maturity (whether at
stated  maturity,  upon  redemption  or  acceleration  of maturity or otherwise,
hereinafter  "Maturity")  will be paid to the person to whom  principal is paid.
However,  if there has been a default in the  payment of  interest  on any Bond,
such  defaulted  interest  may be  payable  to the Holder of such Bond as of the
close of  business on a date  selected by the Trustee  which is not more than 15
days and not less than 10 days prior to the date  proposed  by the  Company  for
payment  of  such  defaulted   interest  or  in  any  other  lawful  manner  not
inconsistent with the requirements of any securities exchange on which such Bond
may be listed, if the Trustee deems such manner of payment practicable. (Section
307)

         Principal of and premium, if any, and interest on the Bonds at Maturity
will be payable upon  presentation  of the Bonds at the office of the Trustee in
Chicago,  Illinois or, at the option of the Holder,  at the principal  corporate
trust office of The First  National Bank of Chicago in New York,  New York.  The
transfer of Bonds may be  registered,  and the Bonds may be exchanged  for other
Bonds of the same series and tranche, of authorized  denominations of like tenor
and  aggregate  principal  amount,  at the office of The First  National Bank of
Chicago in New York, New York as Bond Registrar for the Bonds.  The Company will
not be required to issue, and no Bond Registrar will be required to register the
transfer of or to exchange (a) Collateral  Trust Bonds of any series  (including
the Bonds offered  hereby) during a period of 15 days prior to giving any notice
of  redemption  thereof or (b) any Bond  selected for  redemption in whole or in
part, except the unredeemed portion of any Bond being redeemed in part. (Section
305)

         The  Company  may  change  the place for  payment  or  registration  of
transfer  or exchange of the Bonds,  may appoint one or more  additional  Paying
Agents or Bond Registrars (including,  without limitation,  the Company) and may
remove any Paying Agent or Bond Registrar, all at its discretion. The applicable
Prospectus  Supplement or a supplement  thereto,  will identify any such changes
prior to the date of such Prospectus Supplement or supplement thereto.  (Section
602)


                                       7





Redemption

         Any terms for the optional or mandatory redemption of the Bonds will be
set forth in a Prospectus  Supplement  or a supplement  thereto.  Except as will
otherwise  be provided  with  respect to Bonds  redeemable  at the option of the
Holder, redeemable Bonds will be redeemed only upon notice by mail not less than
30 nor more than 60 days prior to the date  fixed for  redemption  and,  if less
than all the Bonds of a series, or any tranche thereof, are to be redeemed,  the
particular  Bonds to be  redeemed  will be  selected  by such  method as will be
provided for any particular series, or in the absence of any such provision,  by
such method as the Bond Registrar deems fair and appropriate.  (Sections 503 and
504)

         Any notice of  redemption of Bonds,  at the option of the Company,  may
state that such redemption will be conditional  upon receipt by the Trustee,  on
or prior to the date fixed for such  redemption,  of money sufficient to pay the
principal of and premium,  if any, and interest,  if any, on such Bonds and that
if such  money has not been so  received,  such  notice  will be of no force and
effect and the Company will not be required to redeem such Bonds. (Section 504)

No Maintenance, Replacement or Sinking Funds

         While the  Mortgage  contains  provisions  for the  maintenance  of the
Mortgage  Property  (Section  601), it does not contain any  provisions  for any
maintenance,  replacement,  sinking  or  analogous  fund  and,  except as may be
provided in the applicable Prospectus Supplement, or a supplement thereto, there
will be no provisions for any such funds for the Bonds.

Security

         General.  Except as discussed below,  securities  (including the Bonds)
now or hereafter issued under the Mortgage will be secured primarily by:

                  (a) first mortgage bonds issued under the Company's  Indenture
         of Mortgage  and Deed of Trust,  dated as of August 1, 1940 (as amended
         and supplemented,  the "1940 Indenture"), to The First National Bank of
         Chicago,  as trustee (the "1940 Indenture  Trustee"),  and delivered to
         the Trustee under the Mortgage.  As discussed under "DESCRIPTION OF THE
         1940 INDENTURE - Security," the 1940 Indenture constitutes,  subject to
         certain  exceptions,  a first mortgage lien on substantially all of the
         properties  of the Company  except  properties  of Iowa Southern at the
         time of the IE-ISU merger;

                  (b)  first  mortgage   bonds  issued  under  Iowa   Southern's
         Indenture  or Deed of Trust,  dated as of  February 1, 1923 (as amended
         and supplemented,  the "ISU 1923  Indenture"),  with The Northern Trust
         Company  (The First  National  Bank of  Chicago,  successor)  (the "ISU
         Corporate  Trustee")  and  Harold  H.  Rockwell  (Richard  D.  Manella,
         successor) as trustees (the "ISU Indenture Trustees"), and delivered to
         the Trustee under the Mortgage;  as discussed under "DESCRIPTION OF THE
         ISU 1923  INDENTURE - Security,"  the ISU 1923  Indenture  constitutes,
         subject to certain  exceptions,  a first mortgage lien on substantially
         all of the properties  owned by Iowa Southern at the time of the IE-ISU
         merger  (which are now,  subsequent  to such merger,  properties of the
         Company); and

                  (c) the Lien of the Mortgage on the Company's  properties used
         in the  generation,  purchase,  transmission,  distribution  or sale of
         electric  energy by the Company,  or in the manufacture of manufactured
         gas,  or in the  purchase,  transportation,  distribution  or  sale  of
         manufactured  gas or natural  gas, or in the  generation,  manufacture,
         distribution  or sale of steam and hot  water,  which Lien is junior to
         the liens of the 1940 Indenture and the ISU 1923 Indenture.

(Granting Clause First)

         As  discussed  below  under  "Class "A"  Bonds,"  following a merger or


                                       8





consolidation  of another  corporation  into the  Company,  or the  transfer  by
another  corporation  of property to the  Company,  the Company  could issue and
deliver to the Trustee bonds issued under an existing mortgage on the properties
of such other  corporation  in lieu of or in addition to bonds  issued under the
1940  Indenture  or the ISU  1923  Indenture.  In  such  event,  the  securities
(including the Bonds) issued under the Mortgage would be secured,  additionally,
by such bonds and by the Lien of the  Mortgage on the  properties  of such other
corporation, which would be junior to the liens of the existing mortgage of such
corporation,  the 1940 Indenture and the ISU 1923 Indenture.  The 1940 Indenture
and the ISU  1923  Indenture  and all  such  other  mortgages  are  hereinafter,
collectively,  called the "Class "A" Mortgages," and all bonds outstanding under
the Class "A"  Mortgages  are  hereinafter  collectively  called  the "Class "A"
Bonds." If and when no Class "A"  Mortgages  are in effect,  the  Mortgage  will
constitute a first mortgage lien on all property of the Company subject thereto.
(Sections 101 and 706)

         Class "A"  Bonds.  Any Class  "A"  Bonds  issued  after the date of the
Mortgage  (other than in  substitution  or exchange for  previously  outstanding
Class "A" Bonds) will be issued and delivered to, and registered in the name of,
the Trustee or its nominee and will be owned and held by the Trustee, subject to
the provisions of the Mortgage, for the benefit of the Holders of all securities
issued  under the Mortgage and  Outstanding  from time to time.  Class "A" Bonds
issued as the basis of  authentication  and  delivery  of  securities  under the
Mortgage (a) will mature on the same dates,  and in the same principal  amounts,
as such securities and (b) will contain, in addition to any mandatory redemption
provisions applicable to all Class "A" Bonds Outstanding under the related Class
"A" Mortgage,  mandatory  redemption  provisions  correlative  to provisions for
mandatory  redemption,  or for  redemption at the option of the Holder,  of such
securities.  Class "A" Bonds issued as the basis for authentication and delivery
of a series or tranche of  securities  under the Mortgage (x) may, but need not,
bear interest,  any such interest to be payable at the same times as interest on
the  securities  of such  series or tranche and (y) may,  but need not,  contain
provisions  for the  redemption  thereof at the option of the Company,  any such
redemption  to be made at a  redemption  price  or  prices  not  less  than  the
principal amount of such Class "A" Bonds.
(Sections 402 and 701)

         Any  payment by the Company of  principal  of or premium or interest on
the Class "A" Bonds held by the  Trustee  will be applied by the  Trustee to the
payment of any principal, premium or interest, as the case may be, in respect of
any  Mortgage  securities  which  is  then  due  and,  to  the  extent  of  such
application,  the  obligation  of the  Company  under the  Mortgage to make such
payment in respect of such securities  will be deemed  satisfied and discharged.
If,  at the time of any such  payment  of  principal  of Class "A"  Bonds,  such
payment  shall  exceed  the  amount  of  principal  then due in  respect  of the
securities,  the excess of such payment will be deemed to constitute Funded Cash
and  will be held by the  Trustee  as  part  of the  Mortgaged  Property,  to be
withdrawn,  used or applied as provided in the Mortgage.  If, at the time of any
such payment of premium or interest on Class "A" Bonds held by the Trustee, such
payment  shall  exceed the amount of premium or interest  then due in respect of
such securities,  the excess of such payments will be remitted to the Company at
its  request.  Any payment by the Company of principal of or premium or interest
on any  Mortgage  securities  authenticated  and  delivered  on the basis of the
deposit  with the Trustee of Class "A" Bonds (other than by  application  of the
proceeds  of a payment in respect of such Class "A" Bonds)  will,  to the extent
thereof,  be deemed to satisfy and discharge the  obligation of the Company,  if
any, to make a payment of principal, premium or interest, as the case may be, in
respect of such Class "A" Bonds which is then due. (Section 702; see "Withdrawal
of Cash" below.)

         The Trustee may not sell,  assign or  otherwise  transfer any Class "A"
Bonds held by the Trustee  except to a  successor  trustee  under the  Mortgage.
(Section 704) At the time any Mortgage securities of any series or tranche which
have been authenticated and delivered upon the basis of Class "A" Bonds cease to
be  Outstanding  (other than a result of the  application of the proceeds of the
payment or redemption of such Class "A" Bonds),  the Trustee shall surrender to,
or upon the order of, the  Company an equal  principal  amount of such Class "A"
Bonds having the same Stated  Maturity and  mandatory  redemption  provisions as
such securities.  (Section 703)

         At the date of this  Prospectus,  the only Class "A"  Mortgages are the
1940  Indenture and the ISU 1923 Indenture and the only Class "A" Bonds issuable
are first mortgage bonds issuable thereunder.  The Mortgage provides that in the
event  of the  merger  or  consolidation  of  another  company  with or into the
Company,  an existing  mortgage  constituting a lien on properties of such other
company prior to the Lien of the Mortgage may be designated by the Company as an
additional Class "A" Mortgage. Any bonds thereafter issued under such additional
mortgage  would be Class "A" Bonds and (other than in  substitution  or exchange
for previously  Outstanding Class "A" Bonds) could be issued only to provide the
basis for the  authentication  and delivery of  securities  under the  Mortgage.
(Section 706)


                                       9





         When no bonds are  Outstanding  under a Class "A"  Mortgage  except for
Class "A" Bonds held by the  Trustee,  then,  at the  request of the Company and
subject to satisfaction of certain  conditions,  the Trustee will surrender such
Class "A" Bonds for  cancellation  and the related  Class "A"  Mortgage  will be
satisfied and discharged;  whereupon, the lien of such Class "A" Mortgage on the
property  owned by the Company  will cease to exist and the Lien of the Mortgage
will become a first mortgage lien on such property,  subject to Permitted Liens.
(Section 707)

         So long as any  securities  are  Outstanding  under the  Mortgage,  the
Company will not (a) issue any additional  Class "A" Bonds except (i) to replace
any  mutilated,  destroyed,  lost or stolen  securities of the same series or to
effect  exchanges and transfers of such securities or (ii) to the Trustee as the
basis for the  authentication  and delivery of  securities or (b) subject to the
lien of any Class "A" Mortgage any property which is excepted and excluded from,
or not included in or subject to, the lien of such Class "A" Mortgage.  (Section
610) First mortgage bonds may be issued under the 1940 Indenture on the basis of
property  additions,  retirements  of bonds  previously  issued  under  the 1940
Indenture and cash deposited with the 1940 Indenture Trustee.  (See "DESCRIPTION
OF THE 1940 INDENTURE - Issuance of Additional Bonds.") First mortgage bonds may
be issued  under the ISU 1923  Indenture  on the  basis of  property  additions,
retirements  of bonds  previously  issued under the ISU 1923  Indenture and cash
deposited  with the ISU Corporate  Trustee.  (See  "DESCRIPTION  OF THE ISU 1923
INDENTURE - Issuance of Additional Bonds.")

         Lien of the Mortgage. At the date of this Prospectus, substantially all
of the Company's property subject to the Lien of the Mortgage is also subject to
the  prior  lien of the 1940  Indenture  or the ISU 1923  Indenture.  Any  Bonds
offered  hereby  will have the  benefit of the first  mortgage  lien of the 1940
Indenture and the ISU 1923  Indenture on such  property,  and the benefit of the
prior lien of any additional Class "A" Mortgage on any property subject thereto,
to the extent of the aggregate  principal amount of Class "A" Bonds issued under
the respective Class "A" Mortgage and held by the Trustee.

         The Lien of the  Mortgage is subject to Permitted  Liens which  include
tax liens and other  governmental  charges which are not delinquent or which can
thereafter be paid without  penalty or which are being  contested,  construction
and materialmen's  liens,  certain judgment liens,  easements,  reservations and
rights of others (including  governmental entities) in, and defects of title in,
certain  property of the  Company,  certain  leasehold  interests,  liens on the
Company's pollution control and sewage and solid waste disposal facilities which
were previously  financed with industrial  development revenue bonds and certain
other liens and encumbrances. (Granting Clauses and Section 101)

         There are excepted from the Lien of the  Mortgage,  among other things,
cash and securities not paid,  deposited or held under the Mortgage;  contracts,
leases and other  agreements of all kinds,  contract  rights,  bills,  notes and
other instruments,  accounts receivable, claims, judgments, certain intellectual
property  rights  and  other  general  intangibles;  automobiles,  aircraft  and
vessels;  all  goods,  wares,  merchandise,   equipment,   spare  parts,  tools,
materials,  supplies and fuel held for sale or lease in the  ordinary  course of
business or for use or consumption in, or in the operation of, any properties of
or for the  benefit of the  Company;  nuclear  fuel;  computers,  machinery  and
equipment used exclusively for corporate  administrative  or clerical  purposes;
all gas, oil,  minerals and timber,  and rights thereto;  electric energy,  gas,
steam,  water and other  products  generated,  produced or  purchased;  property
installed  on the  premises of  customers  of the Company and designed to aid in
conservation  or efficient  use of energy;  leasehold  interests  and  leasehold
improvements  of the Company;  and all property which is located  outside of the
State of Iowa and is neither  specifically  described in the Granting Clauses of
the Mortgage nor specifically  subjected or required to be subjected to the Lien
of the Mortgage by any provision thereof. (Granting Clauses)

         Without  the  consent of the  Holders,  the Company and the Trustee may
enter  into  supplemental  indentures  to  subject  to the Lien of the  Mortgage
additional  property  (including property which would otherwise be excepted from
such Lien).  (Section 1401) Such property,  so long as the same would  otherwise
constitute Property Additions, would thereupon constitute Property Additions and
be available as a basis for the issuance of securities under the Mortgage.  (See
"Issuance of Additional Securities" below.) Property Additions generally include
any unit or element of property  which is owned by the Company and is subject to
the Lien of the Mortgage  except (i) any property,  the cost of  acquisition  or
construction of which is property  chargeable to an operating expense account of
the  Company  and (ii)  goodwill,  going  concern  value  rights and  intangible
property,  unless  the cost  thereof  is  included  in the cost of such  unit or
element  of  property  and no  separate  consideration  was paid or  apportioned
therefor,  in which case  Property  Additions may include such  goodwill,  going
concern rights and intangible property. (Section 103)


                                       10





         The Mortgage contains  provisions  subjecting  after-acquired  property
(other than Excepted Property) to the Lien thereof. These provisions are limited
in the case of  consolidation  or  merger  or sale of  substantially  all of the
Company's assets. In the event of consolidation or merger or the transfer of all
of the Mortgaged Property as or substantially as an entirety,  the Mortgage will
not be required to be a lien upon any of the properties then owned or thereafter
acquired  by the  successor  corporation  except  properties  acquired  from the
Company  in or as a result  of such  transaction  and  properties  which  are an
integral  part of,  or  essential  to the use or  operation  of,  any  Mortgaged
Property,  and  renewals,  replacements  and  substitutions  of or for any  part
thereof. (Article Thirteen; see "Consolidation,  Merger, Conveyance, Transfer or
Lease" below.) In addition,  after-acquired  property may be subject to vendors'
liens,  purchase  money  mortgages  and  other  liens  thereon  at the  time  of
acquisition thereof, including the lien of any Class "A" Mortgage.

         The Mortgage  provides that the Trustee will have a lien,  prior to the
lien on behalf of the holders of  securities  issued  under the  Mortgage,  upon
Mortgaged Property, for the payment of its reasonable  compensation and expenses
and for indemnity against certain liabilities. (Section 1107)

Issuance of Additional Securities

         The maximum  principal  amount of securities  which may be issued under
the Mortgage is unlimited.  (Section 301) Under the Mortgage,  securities of any
series  may be issued  from time to time on the  basis of,  and in an  aggregate
principal amount not exceeding:

         (1)      the aggregate  principal  amount of Class "A" Bonds issued and
delivered to the Trustee for such purpose;

         (2)      75% of the Cost or fair value  (whichever is less) of Property
Additions  (as  described  below)  which  do  not  constitute   Funded  Property
(generally, Funded Property includes Property Additions which have been made, or
deemed to have  been  made,  the basis of the  authentication  and  delivery  of
securities,  the release of Mortgaged  Property from the Lien of the Mortgage or
cash withdrawals,  or which have been substituted for retired  property),  after
certain  deductions and  additions,  primarily  including  adjustments to offset
property retirements;

         (3)      the aggregate  principal amount of Retired  Securities  (which
consist of securities no longer  outstanding  under the Mortgage  which have not
been used for certain other  purposes under the Mortgage and which are not to be
paid,  redeemed,  purchased or otherwise  retired by the application  thereto of
Funded Cash) or Retired Prior Lien Bonds; and

         (4)      the amount of cash deposited with the Trustee.

(Article Four)

         The Company is not required to satisfy a net earnings requirement prior
to the issuance of securities under the Mortgage.

         Unless otherwise provided in the applicable Prospectus  Supplement,  or
supplement  thereto,  the Company will issue the Bonds on the basis of Class "A"
Bonds issued under the 1940 Indenture. (See "DESCRIPTION OF THE 1940 INDENTURE -
Issuance of Additional  Bonds" for a  description  of the  requirements  for the
issuance of bonds under the 1940  Indenture,  which  requirements  are generally
more restrictive than those for the issuance of securities under the Mortgage.)

Release of Property

         Unless an Event of Default  (hereinafter  defined)  shall have occurred
and be  continuing,  the  Company  may obtain the  release  from the Lien of the


                                       11





Mortgage  of any  Funded  Property,  except for cash held by the  Trustee,  upon
delivery to the Trustee of cash equal in amount to the amount,  if any, that the
Cost of the  property  to be  released  (or,  if less,  the  fair  value of such
property at the time it became Funded Property) exceeds the aggregate of:

                  (1)       the   principal    amount,    subject   to   certain
         limitations,  of obligations  secured by purchase money  mortgages upon
         the property to be released delivered to the Trustee;

                  (2)       the  Cost or  fair  value  (whichever  is  less)  of
         certified  Property  Additions not  constituting  Funded Property after
         certain deductions and additions,  primarily  including  adjustments to
         offset property  retirements  (except that such adjustments need not be
         made if such Property Additions were acquired or made within the 90-day
         period preceding the request for such release);

                  (3)       an  amount  equal  to  133-1/3%  of  the   aggregate
         principal  amount of securities  the Company would be entitled to issue
         on the basis of Retired  Securities  or Retired  Prior Lien Bonds (with
         such entitlement being waived by operation of such release);

                  (4)       the amount of cash deposited  with, or the principal
         amount of  obligations  secured by purchase  money  mortgages  upon the
         property  released and  delivered  to, the Trustee or other holder of a
         lien prior to the Lien of the Mortgage;

                  (5)       an  amount  equal  to  133-1/3%  of  the   aggregate
         principal  amount of  securities  Outstanding  under the  Mortgage  and
         delivered to the Trustee  (with such  Securities  to be canceled by the
         Trustee); and

                  (6)       any  taxes  and  expenses  incidental  to any  sale,
         exchange,  dedication  or  other  disposition  of  the  property  to be
         released.

(Section 803)

         Unless an Event of  Default  shall  have  occurred  and be  continuing,
property which is not Funded Property may generally be released from the Lien of
the Mortgage without depositing any cash or property with the Trustee as long as
(a) the  aggregate  amount  of Cost or fair  value  (whichever  is  less) of all
Property  Additions  which do not  constitute  Funded  Property  (excluding  the
property to be released)  after  certain  deductions  and  additions,  primarily
including adjustments to offset property  retirements,  is not less than zero or
(b) the Cost or fair value  (whichever  is less) of property to be released does
not exceed the aggregate amount of the Cost or fair value (whichever is less) of
Property  Additions  acquired or made  within the 90-day  period  preceding  the
release. (Section 804)

         The Mortgage provides simplified procedures for the release of property
which has been released from the lien of Class "A" Mortgages,  minor  properties
and property taken by eminent domain,  and provides for  dispositions of certain
obsolete  property and grants or surrender of certain rights without any release
or consent by the Trustee.

         If any  property  released  from the Lien of Mortgage  continues  to be
owned by the Company after such release,  the Mortgage will not become a lien on
any   improvement,   extension  or  addition  to  such   property  or  renewals,
replacements  or  substitutions  of or for any part or  parts of such  property.
(Article Eight)

Withdrawal of Cash

         Subject to certain  limitations,  unless an Event of Default shall have
occurred and be continuing, cash held by the Trustee may (1) be withdrawn by the
Company  (a) to the  extent  of the Cost or fair  value  (whichever  is less) of
Property  Additions not constituting  Funded Property,  after certain deductions
and additions,  primarily including  adjustments to offset retirements or (b) in
an amount equal to 133-1/3% of the aggregate principal amount of securities that
the  Company  would be  entitled  to issue  under the  Mortgage  on the basis of
Retired  Securities  or Retired Prior Lien Bonds (with the  entitlement  to such
issuance being waived by operation of such withdrawal) or (c) in an amount equal
to 133-1/3% of the  aggregate  principal  amount of any  securities  Outstanding
under the Mortgage  and issued under the Mortgage and  delivered to the Trustee,
or (2) upon the  request  of the  Company,  be applied  to (a) the  purchase  of


                                       12





securities  issued under the Mortgage (at prices not  exceeding  133-1/3% of the
principal amount thereof) or (b) the redemption or payment at Stated Maturity of
securities  issued  under the  Mortgage  (with any  securities  received  by the
Trustee  pursuant to these  provisions  being canceled by the Trustee)  (Section
806); provided,  however,  that cash deposited with the Trustee as the basis for
the  authentication  and delivery of securities,  as well as cash representing a
payment of  principal  of Class "A" Bonds,  may only be  withdrawn  in an amount
equal to the  aggregate  principal  amount of  securities  the Company  would be
entitled to issue under the Mortgage on any basis (with the  entitlement to such
issuance being waived by operation of such withdrawal), or may, upon the request
of the Company,  be applied to the purchase  redemption or payment of securities
issued  under the  Mortgage  at prices  not  exceeding,  in the  aggregate,  the
principal amount thereof. (Sections 405 and 702)

Consolidation, Merger, Conveyance, Transfer or Lease

         The  Company  may  not  consolidate   with  or  merge  into  any  other
corporation  or  convey,   transfer  or  lease  the  Mortgaged  Property  as  or
substantially  as an entirety to any Person  unless (a) such  transaction  is on
such terms as will fully preserve in all material respects the Lien and security
of the Mortgage and the rights and powers of the Trustee and the Holders and (b)
the corporation formed by such consolidation or into which the Company is merged
or the Person which acquires by conveyance or other  transfer,  or which leases,
the  Mortgaged  Property as or  substantially  as an  entirety is a  corporation
organized and existing under the laws of the United States of America, any State
or Territory thereof or the District of Columbia,  and such corporation executes
and  delivers  to the  Trustee  a  supplemental  indenture,  which  contains  an
assumption by such corporation of the Company's  obligations  under the Mortgage
and  which  contains  a  grant,  conveyance,   transfer  and  mortgage  by  such
corporation  confirming  the Lien of the Mortgage on the Mortgaged  Property and
subjecting  to such Lien all property  thereafter  acquired by such  corporation
which shall constitute an integral part, or be essential to the use or operation
of, any Mortgage  Property or a renewal,  replacement or  substitution of or for
any part thereof. (Section 1301)

Modification of the Mortgage

         Without  the  consent of any  Holders,  the Company and the Trustee may
enter into one or more supplemental  indentures for certain purposes,  including
any of the following:

                  (a)       to evidence the  succession of another Person to the
         Company and the  assumption  by any such  successor of the covenants of
         the Company in the Mortgage and in the securities; or

                  (b)       to add one or more covenants of the Company or other
         provisions  for the  benefit of all  Holders or for the  benefit of the
         Holders  of,  or to remain  in  effect  only so long as there  shall be
         outstanding,  securities  issued  under  the  Mortgage  of one or  more
         specified series, or one or more tranches thereof,  or to surrender any
         right or power conferred upon the Company by the Mortgage; or

                  (c)       to  correct  or  amplify  the   description  of  any
         property at any time subject to the Lien of the Mortgage, or to subject
         to the Lien of the Mortgage additional property; or

                  (d)       to change or eliminate any provision of the Mortgage
         or to add any new  provision to the  Mortgage,  provided  that, if such
         change,  elimination or addition adversely affects the interests of the
         Holders of the  securities  of any  series or  tranche in any  material
         respect,  such change,  elimination  or addition will become  effective
         with  respect to such  series or tranche  only when no security of such
         series or tranche remains Outstanding under the Mortgage; or

                  (e)       to establish the form or terms of the  securities of
         any series or tranche as permitted by the Mortgage; or

                  (f)       to cure any ambiguity,  to correct or supplement any
         provision therein which may be defective or inconsistent with any other
         provision  therein,  or to comply with the rules or  regulations of any
         national  securities  exchange  on which any of the  securities  issued
         under the Mortgage may be listed, or to change,  alter, modify, vary or
         eliminate any of the provisions  thereof or to add other  provisions to
         the   Mortgage,   so   long  as  such   other   changes,   alterations,
         modifications,  variations,  eliminations or additions do not adversely
         affect the  interests  of the  Holders of  securities  of any series or
         tranche in any material  respect,  unless they are expressly  stated to
         become effective only as to securities which are not then Outstanding.


                                       13





         Without  limiting  the  generality  of  the  foregoing,  if  the  Trust
Indenture Act of 1939, as amended (the "Trust  Indenture Act"), is amended after
the date of the Mortgage in such a way as to require  changes to the Mortgage or
the  incorporation  therein of additional  provisions or so as to permit changes
to, or the elimination of,  provisions  which, at the date of the Mortgage or at
any time thereafter, were required by the Trust Indenture Act to be contained in
the  Mortgage,  the  Company  and the  Trustee  may,  without the consent of any
Holders,  enter into one or more  supplemental  indentures to evidence or effect
such amendments. (Section 1401)

         For most  purposes not described  above,  the consent of the Holders of
not less than a majority in aggregate  principal amount of the securities of all
affected series then Outstanding  under the Mortgage is required for the purpose
of amending  or  modifying  the  Mortgage  pursuant to one or more  supplemental
indentures;  provided,  however,  that no such  amendment or  modification  may,
without the consent of each Holder of the Outstanding  securities of each series
or tranche  directly  affected  thereby,  (a) change the Stated  Maturity of the
principal  of, or any  installment  of principal of or interest on, any security
issued under the Mortgage, or reduce the principal amount thereof or the rate of
interest  thereon  (or the amount of any  installment  of  interest  thereon) or
change the method of  calculating  such rate or reduce any premium  payable upon
the  redemption  thereof,  or  impair  the  right  to  institute  suit  for  the
enforcement of any such payment on or after the maturity thereof, (b) permit the
creation of any lien ranking  prior to the Lien of the Mortgage  with respect to
all or substantially all of the Mortgaged  Property or terminate the Lien of the
Mortgage,  or (c) reduce the percentage in principal  amount of the  Outstanding
securities  of such  series or  tranche,  the consent of the Holders of which is
required for any such supplemental  indenture,  or the consent of the Holders of
which is  required  for any  waiver  of  compliance  with any  provision  of the
Mortgage  or of any  default  thereunder  and its  consequences,  or reduce  the
requirements  for quorum or voting.  A supplemental  indenture  which changes or
eliminates  any covenant or other  provision of the Mortgage which has expressly
been included solely for the benefit of the Holders of, or which is to remain in
effect  only so long as there  shall be  Outstanding  securities  of one or more
specified series, or one or more tranches thereof, or modifies the rights of the
Holders of securities  such series or tranches with respect to such covenants or
other  provision,  will not be deemed to affect the rights under the Mortgage of
Holders of the securities of any other series or tranche. (Section 1402)

Waiver

         The Holders of at least a majority in aggregate principal amount of all
affected  Outstanding  securities  issued  under  the  Mortgage  may  waive  the
Company's obligations to comply with certain covenants of the Mortgage, provided
that such waiver  occurs before the time such  compliance is required.  (Section
609)

Events of Default

         Each of the following events  constitutes an Event of Default under the
Mortgage:

                  (1)       failure to pay interest on any security issued under
         the Mortgage within 90 days after the same becomes due;

                  (2)       failure to pay principal or premium,  if any, on any
         security issued under the Mortgage within three business days after its
         due date;

                  (3)       failure  to  perform  or breach of any  covenant  or
         warranty of the Company in the  Mortgage  (other than as referred to in
         (1) or (2) above) for a period of 90 days after there has been given to
         the  Company by the  Trustee,  or to the Company and the Trustee by the
         Holders of at least 30% in principal  amount of Outstanding  securities
         issued under the Mortgage,  a written notice specifying such default or
         breach and  requiring it to be remedied and stating that such notice is
         a "Notice of  Default,"  unless the  Trustee,  or the  Trustee  and the
         Holders of a principal amount of securities not less than the principal
         amount of securities the Holders of which gave such notice, as the case
         may be,  agree in writing to an  extension  of such period prior to its
         expiration;  provided,  however,  that the Trustee,  or the Trustee and
         such  Holders,  as the case may be, will be deemed to have agreed to an
         extension of such period if corrective action has been initiated by the
         Company within such period and is being diligently pursued;


                                       14





                  (4)       certain   events    relating   to    reorganization,
         bankruptcy and insolvency of the Company and  appointment of a receiver
         or trustee for its property; and

                  (5)       the  occurrence  of a matured event of default under
         any Class "A"  Mortgage;  provided  that the waiver or cure of any such
         event of default and the rescission  and annulment of the  consequences
         thereof shall constitute a waiver of the corresponding Event of Default
         under the Mortgage and a rescission  and annulment of the  consequences
         thereof.

(Section 1001)

         The Trust  Indenture Act  currently  requires that the Company give the
Trustee,  not less often than  annually,  a brief  statement as to the Company's
compliance with the conditions and covenants under the Mortgage.

Remedies

         If an Event of Default  occurs and is  continuing,  then the Trustee or
the Holders of not less than a majority in principal  amount of securities  then
Outstanding  under the  Mortgage  may  declare the  principal  amount (or if the
securities are Discount Securities,  such portion of the principal amount as may
be provided for such Discount  Securities pursuant to the terms of the Mortgage)
of all of the securities  Outstanding  under the Mortgage together with premium,
if any, and interest accrued, if any, thereon to be immediately due and payable.
At any time  after such  declaration  of the  maturity  of the  securities  then
Outstanding,  but before the sale of any of the Mortgaged  Property and before a
judgment or decree for payment of money shall have been  obtained by the Trustee
as provided in the Mortgage,  the Event or Events of Default giving rise to such
declaration  of  maturity  will,  without  further  act,  be deemed to have been
waived,  and such declaration and its consequences will, without further act, be
deemed to have been rescinded and annulled, if

         (a)      the  Company  has paid or  deposited  with the  Trustee  a sum
sufficient to pay

                  (1)      all overdue interest,  if any, on all securities then
         Outstanding under the Mortgage;

                  (2)      the  principal  of  and  premium,   if  any,  on  any
         securities  then  Outstanding  under the Mortgage which have become due
         otherwise than by such declaration of acceleration and interest thereon
         at the rate or rates prescribed therefor in such securities; and

                  (3)      all amounts due to the  Trustee as  compensation  and
         reimbursement as provided in the Mortgage; and

         (b)      any  other   Event  or  Events  of  Default   other  than  the
non-payment of the principal of securities which shall have become due solely by
such declaration of acceleration, shall have been cured or waived as provided in
the Mortgage.

(Sections 1002 and 1017)

         The Mortgage  provides  that,  under certain  circumstances  and to the
extent  permitted by law, if an Event of Default occurs and is  continuing,  the
Trustee has the power to take  possession  of, and to hold,  operate and manage,
the Mortgaged  Property,  or with or without entry, sell the Mortgaged Property.
If the  Mortgaged  Property  is sold,  whether  by the  Trustee or  pursuant  to
judicial  proceedings,  the principal of the  securities  Outstanding  under the
Mortgage,  if not previously  due, will become  immediately  due,  together with
premium,  if any,  and any accrued  interest  (including  interest  upon overdue
installments  of  interest  at the same rates  respectively  as were born by the
respective securities on which installments of interest were overdue). (Sections
1003, 1004 and 1005)

         If an Event of  Default  occurs  and is  continuing,  the  Holders of a
majority  in  principal  amount of the  securities  then  Outstanding  under the


                                       15





Mortgage will have the right to direct the time,  method and place of conducting
any proceedings for any remedy  available to the Trustee or exercising any trust
or power  conferred on the Trustee,  provided that (a) such  direction  does not
conflict  with any rule of law or with the  Mortgage,  and could not involve the
Trustee in personal liability in circumstances where indemnity would not, in the
Trustee's  sole  discretion,  be adequate and (b) the Trustee may take any other
action  deemed  proper  by the  Trustee  which  is not  inconsistent  with  such
discretion. (Section 1016)

         The  Mortgage  provides  that no Holder of any  security  will have any
right to institute any  proceeding,  judicial or otherwise,  with respect to the
Mortgage for the  appointment  of a receiver or for any other remedy  thereunder
unless (a) such Holder has previously  given to the Trustee  written notice of a
continuing  Event of  Default;  (b) the  Holders of not less than a majority  in
aggregate principal amount of the securities then Outstanding under the Mortgage
have made written request to the Trustee to institute  proceedings in respect of
such Event of Default and have offered the Trustee reasonable  indemnity against
costs and  liabilities  incurred in  complying  with such  request;  and (c) the
Trustee has refused, or for sixty days after receipt of such Notice, the Trustee
has failed, to institute any such proceeding and no direction  inconsistent with
such  request  has been  given to the  Trustee by the  Holders of a majority  in
aggregate  principal amount of securities then  Outstanding  under the Mortgage.
Furthermore,  no Holder will be entitled to institute  any such action if and to
the extent that such action would  disturb or prejudice  the rights of the other
Holders. (Section 1011)

         Notwithstanding  that the right of a Holder to  institute a  proceeding
with respect to the Mortgage is subject to certain  conditions  precedent,  each
Holder of a security  has the right,  which is absolute  and  unconditional,  to
receive payment of the principal of and premium, if any, and interest (including
interest  upon  overdue  interest),  if any,  on such  security  when due and to
institute suit for the enforcement of any such payment,  and such rights may not
be impaired without the consent of such Holder. (Section 1012)

         The Mortgage  obligates  the Trustee to give the Holders  notice of any
default under the Mortgage to the extent  required by the Trust  Indenture  Act,
unless such default shall have been cured or waived,  except that no such notice
to Holders of a default of the character described in paragraph (3) under "Event
of Default" shall be given until at least 60 days after the occurrence  thereof.
(Section 1102) The Trust Indenture Act currently permits the Trustee to withhold
notices of default (except for certain payment  defaults) if the Trustee in good
faith  determines  the  withholding of such notice to be in the interests of the
Holders.

         As a  condition  precedent  to certain  actions  by the  Trustee in the
enforcement of the Lien of Mortgage and  institution of action on the securities
Outstanding  under the  Mortgage,  the Trustee may  require  adequate  indemnity
against costs, expenses and liabilities to be incurred in connection therewith.
(Sections 1011 and 1101)

         In addition to every other right and remedy  provided in the  Mortgage,
the Trustee may  exercise  any right or remedy  available  to the Trustee in its
capacity  as owner and Holder of Class "A" Bonds  which  arises as a result of a
default or matured event of default under any Class "A" Mortgage, whether or not
an Event of Default under the Mortgage has occurred and is continuing.  (Section
1020)

Defeasance

         Upon  request of the  Company,  any  securities  Outstanding  under the
Mortgage, or any portion of the principal amount thereof, will be deemed to have
been paid for  purposes  of the  Mortgage,  and the entire  indebtedness  of the
Company in respect thereof will be deemed to have been satisfied and discharged,
if there has been  irrevocably  deposited  with the Trustee or any Paying  Agent
(other  than the  Company),  in trust:  (a) money in the  amount  which  will be
sufficient,  or (b) Eligible  Obligations  (as  described  below),  which do not
contain provisions  permitting the redemption or other prepayment thereof at the
option of the issuer  thereof,  the  principal of and the interest on which when
due,  without any regard to  reinvestment  thereof,  will provide  monies which,
together with the money, if any, deposited with or held by the Trustee,  will be
sufficient, or (c) a combination of (a) and (b) which will be sufficient, to pay
when due the principal of and premium, if any, and interest,  if any, due and to
become  due on such  securities  or  portions  thereof.  (Section  901) For this
purpose,  Eligible  Obligations  include direct  obligations  of, or obligations
unconditionally  guaranteed  by, the United  States of America,  entitled to the
benefit of the full  faith and  credit  thereof,  and  certificates,  depositary
receipts or other instruments which evidence a direct ownership interest in such
obligations  or in any specific  interest or  principal  payments due in respect
thereof.


                                       16





         While the Company knows of no legal  precedent on point, it is possible
that, for federal income tax purposes, any deposit contemplated in the preceding
paragraph could be treated as a taxable  exchange of the related  securities for
an issue of  obligations  of the  trust  or a  direct  interest  in the cash and
securities  held in the trust. In that case,  Holders of such  securities  would
recognize  gain or loss as if the trust  obligations  or the cash or  securities
deposited,  as the case may be, had actually  been  received by them in exchange
for their securities.  In addition, such Holders thereafter would be required to
recognize for federal income tax purposes a share of the income, gain or loss of
the trust.  The amount so required to be recognized  could be different from the
amount  that would be  recognized  in the absence of such  deposit.  Prospective
investors  are  urged to  consult  their  own tax  advisors  as to the  specific
consequences to them of any such deposit.

Resignation of the Trustee

         The Trustee may resign at any time by giving  written notice thereof to
the Company or may be removed at any time by act of the Holders of a majority in
principal amount of securities then Outstanding delivered to the Trustee and the
Company.  No  resignation  or removal of the  Trustee  and no  appointment  of a
successor trustee will become effective until the acceptance of appointment by a
successor  trustee in accordance with the requirements of the Mortgage.  So long
as no Event of Default or event which,  after notice or lapse of time,  or both,
would become an Event of Default has occurred and is continuing,  if the Company
has delivered to the Trustee a resolution of its Board of Directors appointing a
successor trustee and such successor has accepted such appointment in accordance
with the terms of the Mortgage,  the Trustee will be deemed to have resigned and
the  successor  will be deemed to have been  appointed as trustee in  accordance
with the Mortgage. (Section 1110)

More Restrictive Provisions of Class "A" Mortgages

         The Mortgage is less  restrictive  upon the Company in certain respects
than is either the 1940 Indenture or the ISU 1923  Indenture,  but the Class "A"
Bonds issued under either of those  indentures and delivered to the Trustee will
be entitled to the benefits of more  restrictive  provisions of those indentures
(see  "DESCRIPTION  OF THE  1940  INDENTURE"  and  "DESCRIPTION  OF THE ISU 1923
INDENTURE" below). However,  pursuant to the Mortgage, the Trustee, as holder of
the  Class "A"  Bonds,  will  vote  such  Class  "A"  Bonds in favor of  certain
amendments  to the 1940  Indenture  and ISU 1923  Indenture.  (Section  705; see
"Voting of Class "A" Bonds" under each of  "DESCRIPTION  OF THE 1940  INDENTURE"
and "DESCRIPTION OF THE ISU 1923 INDENTURE" below).

Relationship with the Trustee

         The Trustee or an affiliate  provides  general banking  services to the
Company  including (i) acting as a depositary for certain Company funds and (ii)
issuing a $15,000,000  line of credit to the Company.  As of March 31, 1997, the
line of credit was being used to support  commercial  paper.  Additionally,  the
Trustee has a  $45,000,000  credit  agreement  with the lessor of the  Company's
nuclear fuel supporting the Company's nuclear fuel lease.

         The Trustee is also the 1940 Indenture Trustee,  the ISU 1923 Corporate
Trustee and the Subordinated Indenture Trustee (each as defined below). As such,
the  Trustee  would  have a  conflicting  interest  for  purposes  of the  Trust
Indenture Act if an Event of Default were to occur under the 1940 Indenture, the
ISU 1923 Indenture or the Subordinated  Indenture. In any such case, the Trustee
may be required to  eliminate  such  conflicting  interest by  resigning  as the
Trustee,  the 1940  Indenture  Trustee,  the ISU 1923  Corporate  Trustee or the
Subordinated  Indenture  Trustee.  There  are  other  instances  under the Trust
Indenture Act which would  require the  resignation  of the Trustee,  such as an
affiliate  of the  Trustee  acting as  underwriter  with  respect  to any of the
Securities.


                        DESCRIPTION OF THE 1940 INDENTURE

General


                                       17





         The  summaries of the 1940  Indenture set forth below do not purport to
be complete and are subject to the detailed provisions of the 1940 Indenture,  a
copy of which was previously filed with the Commission,  is listed as an exhibit
to the  Registration  Statement  of  which  this  Prospectus  is a part,  and is
incorporated  herein by reference.  Capitalized terms used in this section which
are not otherwise defined in this Prospectus shall have the meanings ascribed to
them in the 1940 Indenture.  Wherever particular  provisions or terms defined in
the 1940 Indenture are referred to herein,  such  provisions or definitions  are
incorporated  by  reference  as part of the  statements  made  herein,  and such
statements  are  qualified in their  entirety by such  reference.  References to
article and section numbers in this section,  unless  otherwise  indicated,  are
references to article and section numbers of the 1940 Indenture.

Security

         The  1940  Indenture  constitutes  a  direct  first  mortgage  lien  on
substantially  all of the property  and  franchises  of the Company  (other than
expressly  excepted property and other than properties owned by Iowa Southern at
the time of the IE-ISU merger on December 31,  1993),  subject only to permitted
encumbrances and liens.  Substantially  all property and franchises  (other than
expressly  excepted  property)  hereafter  acquired by the  Company  will become
subject to the lien of the 1940  Indenture,  subject only to permitted liens and
encumbrances  and liens and  encumbrances,  if any,  existing  or placed on such
after-acquired property at the time of acquisition thereof. The lien of the 1940
Indenture  on the  property  owned by Iowa  Southern  at the time of the  IE-ISU
merger, and extensions and additions appurtenant to such property, are junior to
the lien of the ISU 1923 Indenture.

         The 1940 Indenture excepts from the lien thereof all cash,  securities,
contracts,  and bills,  notes and accounts  receivable  acquired in the ordinary
course of business which are not  specifically  pledged under the 1940 Indenture
and all tangible  personal  property  purchased or held for sale in the ordinary
course of business or consumable in the operation of the plants or system of the
Company, automobiles, buses, trucks and similar vehicles. (Granting Clauses)

         Any bonds issued under the 1940 Indenture as the basis for the issuance
of Bonds under the Mortgage  will be secured  equally and ratably with the bonds
of all other series then outstanding under the 1940 Indenture.

Effect of the IE-ISU Merger on the 1940 Indenture

         The merger of IE and ISU did not impair the lien of the 1940  Indenture
or any of the rights or powers of the 1940 Indenture  Trustee or the bondholders
under the 1940 Indenture.  (Section 133) Subsequent to that merger,  the Company
became the successor to IE under the 1940 Indenture.

Issuance of Additional Bonds

         The 1940 Indenture does not fix an overall  limitation on the aggregate
principal  amount of the bonds of all series  that may be issued or  outstanding
thereunder. (Section 3) Generally, additional bonds of any series may be issued,
subject to the provisions of the 1940 Indenture, in a principal amount equal to:

                  (a)      60% of Net Bondable Additions not previously utilized
         under the 1940 Indenture  resulting  from the  acquisition by purchase,
         construction or otherwise of Property Additions (Article IV);

                  (b)      the   principal    amount   of   bonds,    previously
         authenticated under the 1940 Indenture,  which have been retired or for
         the retirement of which the 1940 Indenture  Trustee holds the necessary
         funds,  other than bonds redeemed through the operation of cash sinking
         funds and other than retired bonds used to satisfy the  maintenance and
         renewal provisions of the 1940 Indenture (Article VI); or

                  (c)      the amount of cash  deposited with the 1940 Indenture
         Trustee as the basis for the issuance of such bonds,  which cash may be
         applied to the  retirement  of bonds or may be withdrawn in lieu of the
         authentication   of  an  equal  principal  amount  of  bonds  to  whose
         authentication  and  delivery the Company  would be entitled  under the
         provisions referred to in clauses (a) and (b). (Article V)


                                       18





         No such bonds in any event may be issued under (a) or (c), or under (b)
if the bonds to be issued bear a higher rate of interest  than that borne by the
bonds  retired  or being  retired  (except in case such  bonds  mature  within 2
years),  unless (i) the Net  Earnings  of the  Company  for a 12 months'  period
within the  immediately  preceding  15 months'  period  shall have been at least
equal to two times the aggregate  amount of annual interest charges on all bonds
then outstanding under the 1940 Indenture, including the bonds then applied for,
and (ii) at least 85% of such required  minimum amount of Net Earnings  consists
of Net  Operating  Revenues  from the Public  Utility  Property of the  Company.
(Articles IV, V, and VI)

         Bonds  issuable under the 1940 Indenture are available as the basis for
the issuance of  securities  under the  Mortgage.  As of March 31, 1997,  on the
basis of the most restrictive provisions described above, the Company would have
been entitled to issue an aggregate of at least $241 million of additional bonds
under the 1940 Indenture.

Acquisition of Property Subject to Prior Liens

         The 1940  Indenture  prohibits the Company from  acquiring any property
subject to a prior  lien,  or placing  any prior lien on property at the time of
acquisition  thereof, if either the principal amount of indebtedness  secured by
prior liens on such  property  exceeds 60% of the cost or the fair value of such
property,  whichever  shall be less,  or the Net  Earnings  of the Company for a
period of 12 months  within  the 15 months  immediately  preceding  the month in
which the  property is to be acquired  shall not have been at least equal to two
times the aggregate  amount of the annual interest charges on the Secured Bonded
Debt of the Company; provided,  however, that if the Net Earnings of the Company
for the  above-stated  period  shall have been at least equal to three times the
aggregate  amount of the annual  interest  charges on the Secured Bonded Debt of
the Company, then the 60% limitation shall not apply. In the case of each of the
foregoing  Net  Earnings  requirements,  such Net  Earnings  must consist of Net
Operating  Revenues from Public Utility  Property to an extent at least equal to
85% of two or three  times,  as the case may be,  the said  aggregate  amount of
annual interest charges. (Section 83)

Maintenance and Renewal

         The 1940  Indenture  provides that the Company will, for each year, pay
or cause to be paid to the  Trustee,  an  amount  in cash,  as and for a renewal
fund,  equal  to  2-1/2%  (or such  different  percentage  as may be fixed  upon
certification by an independent  engineer that such change in percentage rate is
desirable and justified) of the average gross book value during such year of all
of the depreciable tangible Public Utility Property of the Company (with certain
specified exceptions).  The percentage is currently set at 2-1/2%. The Company's
obligation  to pay such  amount to the  Trustee in cash may at the option of the
Company be  satisfied in whole or in part by the  certification  of unused Gross
Bondable  Additions or the  certification of unused bond  retirements,  or both.
(Section 74)



                                       19




         The 1940  Indenture  also provides (i) that the Company shall  maintain
the  mortgaged  properties  in good  repair  and  working  order;  (ii) that the
Company,  upon written  request served upon it and the Trustee by the holders of
at least 25% in  principal  amount of the bonds  outstanding,  shall  cause such
properties  to be inspected by an  independent  engineer (not more often than at
five-year  intervals)  to  determine  whether they have been so  maintained  and
whether any property,  not retired on the books, should be so classified for the
purpose (among others) of computing Net Bondable  Additions;  and (iii) that the
Company  shall  make  good  any  deficiency  in  maintenance  disclosed  by such
engineer's report as rendered or as modified by arbitration. (Section 73)

Limitations on Dividends on Common Stock

         The 1940  Indenture  prohibits the Company from declaring or paying any
dividends  (except stock dividends or dividends paid out of the proceeds of sale
of stock),  or making other  distributions  on, or acquisitions of, stock unless
immediately  after such dividend,  distribution or acquisition the net income of
the Company  available for dividends (as defined),  for the period from December
31,  1945,  to  and  including  the  date  of  such  dividend,  distribution  or
acquisition,  plus the sum of $250,000 shall at least equal all payments made in
respect of all such dividends, distributions or acquisitions during said period;
provided that such  restriction  shall not apply to the acquisition of stock out
of the proceeds  from the sale of, or in exchange for, any other shares of stock
or securities  representing an equity interest subordinate to all debts, secured
or  unsecured.  (Section  85) Giving  effect to the use of the  proceeds  of the
Securities  offered  hereby,  retained  earnings are not  restricted  under this
provision.


                                       20





Modification of the 1940 Indenture

         In general,  modifications  or  alterations  of the 1940  Indenture and
indentures supplemental thereto and of the rights and obligations of the Company
and of the holders of the bonds may,  with the approval of the Company,  be made
at a meeting of bondholders  upon the affirmative  vote of the holders of 75% or
more of the  aggregate  principal  amount  of the  bonds  entitled  to vote with
respect to the matter  involved,  but no such  modifications  or alterations are
permitted  with respect to certain  basic  matters,  such as terms of payment of
principal or interest on the bonds or the creation of liens ranking prior to, or
on a parity with, the lien of the 1940 Indenture.  (Section 167) (See "Voting of
Class "A" Bonds" below.)

Defaults and Notice Thereof

         Defaults under the 1940 Indenture are defined in substance as being (a)
failure to pay principal or any  installment  of interest on any bond on the due
date;  (b)  failure to observe  any  covenant  or  condition  prescribed  by the
provisions  of any sinking  fund created for the benefit of bonds of any series;
(c) failure to perform any other  covenant or agreement  of the 1940  Indenture,
which failure shall continue for a period of 60 days after a written demand that
such  failure be cured has been  mailed to the  Company by the Trustee or to the
Company by the  holders of 15% in  principal  amount of the bonds;  (d)  certain
events relating to  reorganization,  bankruptcy and insolvency of the Company or
the  appointment of a receiver or trustee of the Company's  property;  (e) final
judgment in excess of $100,000  against the Company  which is not  discharged or
stayed within 30 days; or (f) the assumption by any  governmental  agency or any
court at the instance of any governmental  agency of custody of the whole or any
substantial part of the Trust Estate or of control over the Company's affairs or
operations to the exclusion of management by the Company. (Section 105)

         Upon the occurrence of a Default,  the 1940 Indenture  Trustee may, and
upon request of the holders of a majority in principal amount of the bonds shall
(and the holders of at least 25% in principal amount of the bonds may, by notice
in writing to the  Company),  declare the  principal  of and interest on all the
bonds to be immediately due and payable. (Section 107)

         The 1940 Indenture Trustee is required to give notice of any Default to
holders  of bonds  whose  names are on file  with it  within  90 days  after the
occurrence of a Default known to it, unless such Default has been cured prior to
the giving of such  notice and except that such  notice may be  withheld,  other
than as to a Default in payment of principal  or interest or of any  installment
of any sinking fund, if the 1940 Indenture Trustee determines in good faith that
such withholding is in the interest of the holders of bonds. (Section 106)

         The  holders of not less than a majority in  principal  amount of bonds
then  outstanding  may  direct  the time,  method  and place of  conducting  any
proceeding for any remedy available to the 1940 Indenture  Trustee,  or exercise
any trust or power conferred upon the 1940 Indenture Trustee. (Section 110)

         The Company  must file an annual  Certificate  with the 1940  Indenture
Trustee as to compliance with the conditions and covenants of the 1940 Indenture
and as to the absence of default with respect to any of the covenants  contained
in the 1940 Indenture. (Section 103)

Voting of Class "A" Bonds

         The Trustee  will,  as holder of any Class "A" Bonds  issued  under the
1940 Indenture, attend such meetings of bondholders under the 1940 Indenture, or
deliver its proxy in connection therewith,  as relate to matters with respect to
which it is entitled to vote or consent.  The Mortgage provides that, so long as
no Event of Default as defined in the Mortgage  has  occurred or is  continuing,
the Trustee will, as holder of such Class "A" Bonds, vote or consent:

         (a)      in favor of amendments or  modifications to the 1940 Indenture
of substantially  the same tenor and effect as the following,  together with all
amendments and modifications required to effectuate the following:

                  (i)      to provide that, whenever the 1940 Indenture requires


                                       21



                           authorization  by, or a  resolution  of, the Board of
                           Directors  for the  issuance  of a series of bonds or
                           the   determination   of  the  terms   thereof,   the
                           requirement  shall be  satisfied  if the action taken
                           would be  sufficient  for the issuance of a series of
                           bonds,  or the  determination  of the terms  thereof,
                           under the Mortgage;

                  (ii)     to eliminate the renewal fund and to provide that, to
                           the extent  Property  Additions  have been taken as a
                           credit,   or  cash  held  by  the  Trustee  has  been
                           deposited,  to satisfy the renewal fund  requirements
                           (or to satisfy any sinking fund requirement  which is
                           no longer in effect),  such  Property  Additions  and
                           cash  may be used  for any  purpose  under  the  1940
                           Indenture  (including  as a basis for the issuance of
                           bonds)  as if they  had  never  been so  credited  or
                           deposited;

                  (iii)    to permit  bonds to be issued in a  principal  amount
                           equal  to  75%,  instead  of  60%,  of  Net  Bondable
                           Additions;

                  (iv)     to eliminate  the Net Earnings  requirements  for all
                           purposes,  including in connection  with the issuance
                           of bonds;

                  (v)      to broaden the definition of "Property  Additions" to
                           include all  tangible  property  owned by the Company
                           and subject to the lien of the 1940 Indenture;

                  (vi)     to  eliminate  the  restrictions  on the  payment  of
                           dividends  on, or the  making of other  distributions
                           on, or acquisitions of, stock;

                  (vii)    to  eliminate  most  restrictions  on purchase  money
                           obligations  which may be received  as  consideration
                           for the release of property from the lien of the 1940
                           Indenture;

                  (viii)   to permit the release,  without compliance with other
                           provisions  of the 1940  Indenture,  of any  property
                           provided  that (1) the  release  will not  impair the
                           electric  business of the Company in contravention of
                           the provisions of the 1940 Indenture and (2) the fair
                           value  of   property   released   pursuant   to  this
                           provision,  together with the fair value of all other
                           property  so released  in the then  current  calendar
                           year,  shall not exceed the greater of $5,000,000 and
                           3% of the  aggregate  principal  amount of bonds then
                           outstanding under the 1940 Indenture;

                  (ix)     to  modify   release   provisions   to   delete   the
                           requirement  that the  property to be released  shall
                           "no  longer  be  useful,  necessary,   profitable  or
                           advantageous   in  the   judicious   management   and
                           maintenance  of the Trust Estate or in the conduct of
                           the  business  of  the   Company"  and   substituting
                           therefor  the  requirement  that the  release  of the
                           property  would not  adversely  affect the  Company's
                           electric business;

                  (x)      to permit  the  withdrawal  by the  Company,  without
                           compliance   with  other   provisions   of  the  1940
                           Indenture,  of cash in an amount, together with other
                           amounts  paid over to the  Company  pursuant  to this
                           provision in the then current  calendar  year,  up to
                           the  greater of  $5,000,000  and 3% of the  aggregate
                           principal amount of the bonds then outstanding  under
                           the 1940  Indenture;  provided that such cash must be
                           expended for Property Additions;

                  (xi)     to increase  the amount of cash  withdrawable  by the
                           Company  on the basis of  retired  bonds from 100% of
                           the  principal  amount of such bonds to  133-1/3%  of
                           such principal amount;

                  (xii)    to eliminate most  restrictions on the acquisition of
                           property subject to a prior lien;

                                     22

                  (xiii)   to  limit  the   insurance   coverage  that  must  be
                           maintained by the Company to fire  insurance only and
                           to raise the  minimum  dollar  amount of any one fire
                           loss  which  must be  payable  to the 1940  Indenture
                           Trustee  from  $10,000  to an  amount  equal  to  the
                           greater  of  $5,000,000   and  3%  of  the  aggregate
                           principal amount of bonds then outstanding  under the
                           1940 Indenture;

                  (xiv)    to modify the definition of "Defaults" under the 1940
                           Indenture to be substantially  the same as "Events of
                           Default" under the Mortgage;

                  (xv)     to modify the  provisions  of the 1940  Indenture for
                           the  acceleration of the maturity of bonds to provide
                           that (1) action by the holders of a majority  (rather
                           than the current 25%) in principal amount of the then
                           outstanding  bonds  is  required  to  accelerate  the
                           maturity of all  outstanding  bonds upon  Default and
                           (2) any such  acceleration  and its  consequences are
                           automatically rescinded (rather than at the option of
                           the holders as is currently provided) upon the curing
                           of all Defaults;

                  (xvi)    to reduce  the  quorum  requirements  for  bondholder
                           meetings from 75% to a majority; and

                  (xvii)   to modify the  remedies  provisions  to increase to a
                           majority  from 25% the  percentage  of the  principal
                           amount of  outstanding  bonds,  the  holders of which
                           must have requested  that the 1940 Indenture  Trustee
                           take action before  individual  holders may institute
                           suits against the Company.

         (b)      with respect to any other  amendments or  modifications to the
1940 Indenture as follows:

         the  Trustee  will  vote all  Class  "A"  Bonds  issued  under the 1940
         Indenture   then  held  by  it,  or  consent  with   respect   thereto,
         proportionately  with  what is  reasonably  believed  to be the vote or
         consent of the  holders of all other bonds  Outstanding  under the 1940
         Indenture,  the  holders  of which  are  eligible  to vote or  consent;
         provided,  however,  that (i) at any time the Class "A" Bonds under the
         1940  Indenture  held  by the  Trustee  constitute  a  majority  of the
         principal  amount of the Outstanding  bonds under the 1940 Indenture or
         (ii) at any time such  Class "A" Bonds held by the  Trustee  constitute
         less  than  such a  majority  but  there  is a  proposed  amendment  or
         modification  of the 1940 Indenture  which,  if it were an amendment or
         modification of the Mortgage (See  "DESCRIPTION OF THE COLLATERAL TRUST
         BONDS - Modification  of the  Mortgage"),  would require the consent of
         Holders, then, in either case, the Trustee may only vote such Class "A"
         Bonds in accordance with the vote of the Holders of at least a majority
         of the principal amount of the bonds casting a vote and shall seek that
         vote in accordance  with the  provisions of the Mortgage  applicable to
         required votes of Holders in respect of amendments or  modifications to
         the Mortgage.


                      DESCRIPTION OF THE ISU 1923 INDENTURE

General

         The summaries of the ISU 1923  Indenture set forth below do not purport
to be  complete  and are  subject  to the  detailed  provisions  of the ISU 1923
Indenture,  a copy of which was previously filed with the Commission,  is listed
as an exhibit to the Registration  Statement of which this Prospectus is a part,
and is incorporated herein by reference.  Capitalized terms used in this section
which are not  otherwise  defined in this  Prospectus  shall  have the  meanings
ascribed to them in the ISU 1923 Indenture.  Wherever  particular  provisions or
terms defined in the ISU 1923  Indenture  are referred to in this section,  such
provisions  or  definitions  are  incorporated  by  reference  as  part  of  the
statements  made in this  section,  and such  statements  are qualified in their
entirety by such  reference.  References to article and section  numbers herein,
unless otherwise indicated, are references to article and section numbers of the
ISU 1923 Indenture.


                                       23





Security

         The ISU 1923  Indenture  constitutes a direct first  mortgage lien upon
substantially  all of the property and rights of Iowa  Southern  existing at the
time of the IE-ISU merger on December 31, 1993 and upon extensions and additions
appurtenant  to such  property,  with certain  exceptions  for certain  types of
property (including accounts  receivable) as provided in the ISU 1923 Indenture,
and subject only to permitted liens. (Granting Clauses)

         Any  bonds  issued  under the ISU 1923  Indenture  as the basis for the
issuance of Bonds under the  Mortgage  will be secured  equally and ratably with
the bonds of all other series then outstanding under the ISU 1923 Indenture.

Effect of the IE-ISU Merger on the ISU 1923 Indenture

         The  merger  of IE and ISU  did not  impair  the  lien of the ISU  1923
Indenture  or any of the rights or powers of the ISU  Indenture  Trustees or the
bondholders  under the ISU 1923  Indenture.  (Article  XVI)  Subsequent  to that
merger, the Company became the successor to ISU under the ISU 1923 Indenture.

Issuance of Additional Bonds

         The ISU  1923  Indenture  does  not fix an  overall  limitation  on the
aggregate  principal  amount  of the bonds of all  series  that may be issued or
outstanding thereunder. (Section 2.01)

         Provided that the Earnings  Applicable to Bond Interest for a period of
twelve  consecutive  calendar  months  within  the  fifteen  months  immediately
preceding  issuance are at least twice the annual  interest  requirements of the
bonds  applied  for and all bonds and Prior Lien Bonds  outstanding,  additional
bonds of any series may be issued:

                  (a)      in an aggregate principal amount not exceeding 60% of
         the Cost or Fair Value,  whichever is less, of Property Additions after
         adjustments to offset  retirements and amounts removed from the utility
         plant or fixed capital  accounts of the former Iowa  Southern  (Article
         V);

                  (b)      in an aggregate  principal  amount not  exceeding the
         aggregate  principal  amount of bonds  which  shall  have been  retired
         (other than bonds retired  through the use of certain  funds)  (Article
         VI);

                  (c)      upon deposit of cash with the ISU Corporate  Trustee,
         in an amount equal to the principal amount of the bonds to be so issued
         (and such cash may be  withdrawn  by the  Company in a sum equal to the
         aggregate  principal  amount of the bonds which  could be issued  under
         clause (a) or (b) above). (Article VII)

         Bonds  issuable under the ISU 1923 Indenture are available as the basis
for the issuance of securities under the Mortgage.  As of March 31, 1997, on the
basis of the most restrictive provisions described above, the Company would have
been entitled to issue at least $167 million of  additional  bonds under the ISU
1923 Indenture.

Maintenance Fund

         The  ISU  1923  Indenture  provides  that so long  as  bonds  shall  be
outstanding,  the Company will pay to the ISU Corporate Trustee  annually,  as a
maintenance  fund, a sum of money equal to 15% of the gross operating revenue of
the Company  derived  during the calendar year  preceding  such payment from the
operation  of the  physical  properties  subject  to the  lien of the  ISU  1923
Indenture after  deducting (1) all gross  operating  revenue derived during such
period from the operation of property  subject to a prior lien and (2) an amount
equal to the total  cost to the  Company of  electric  energy  and  natural  gas
purchased by it (and allocable to operations of property  subject to the lien of
the ISU 1923 Indenture) during such period with certain deductions.  The Company
is entitled to credits against such annual payment for certain amounts  expended
for maintenance and repairs and Unapplied Balance of Property Additions, retired
bonds,  and other  matters.  Any moneys  deposited  by the Company  with the ISU
Corporate Trustee in the maintenance fund will, upon the request of the Company,
be applied by the ISU  Corporate  Trustee to the purchase or redemption of bonds
or may be withdrawn by the Company in certain circumstances. (Article XII)


                                       24





Substitutions and Releases

         Generally,  property  subject to the lien of the ISU 1923 Indenture may
be released  only upon the deposit or pledge with the ISU  Corporate  Trustee of
cash, purchase money obligations,  securities,  or the certification of property
additions or, in certain  instances,  upon the substitution of other property of
equivalent  value.  The  Company may also,  under  certain  conditions,  without
release, terminate,  change, or assent to the modification of leases, easements,
franchises, and governmental permits. (Article XI)

Satisfaction and Discharge of Indenture

         If the  Company  shall pay the  principal  of,  premium  (if any),  and
interest on all outstanding bonds issued under the ISU 1923 Indenture (bonds for
the payment or redemption of which  necessary funds have been deposited with the
ISU Corporate Trustee being deemed paid),  then the ISU Indenture  Trustees may,
and upon the request of the Company shall,  cancel and discharge the lien of the
ISU 1923  Indenture  and  reconvey  to the  Company  the  mortgaged  and pledged
property. (Article XIX)

Modification of the ISU 1923 Indenture

         To the  extent  permitted  by the  terms  of the  ISU  1923  Indenture,
modification   or  alteration  of  the  ISU  1923  Indenture  or  any  indenture
supplemental  thereto,  and of the rights and  obligations of the Company and of
ISU  bondholders,  may be made with the consent of the Company by an affirmative
vote of the holders of not less than 80% in principal  amount of the outstanding
bonds issued under the ISU 1923  Indenture  and entitled to vote at a meeting of
bondholders  and by an  affirmative  vote of the holders of not less than 80% of
the  principal  amount  of such  bonds of the  series  affected  by the  change;
provided, however, that no such modification or alteration intended to effect or
permit the extension of the maturity of the principal of any bond, the reduction
in the rate of  interest  thereon,  or any  other  modification  in the terms of
payment of such  principal or interest,  or the taking of certain other actions,
such as creating  liens ranking prior to, or on parity with, the lien of the ISU
1923  Indenture,  shall be  effective as to any bond the holder of which has not
assented to such modification or alteration.  (Article XX) (See "Voting of Class
"A" Bonds" below.)

         The  Company  may fail or omit to  comply  with  certain  covenants  or
conditions of the ISU 1923 Indenture with the written  consent of the holders of
at least 66 2/3% of the principal  amount of all outstanding  bonds issued under
the ISU 1923 Indenture. (Section 15.19)

Defaults and Notice Thereof

         Defaults under the ISU 1923 Indenture are defined in substance as being
(a) failure to pay  principal  of, or premium (if any) on, any bond issued under
the ISU 1923  Indenture;  (b) failure to pay any  installment of interest on any
such bond,  and such failure  continues for 30 days;  (c) failure to observe any
covenant or condition  prescribed by the  provisions of any sinking fund created
for the  benefit  of such bonds of any  series;  (d)  failure by the  Company to
perform  any  other  covenant  or  agreement  in such  bonds  or in the ISU 1923
Indenture, and such failure continues for 60 days after written notice is given;
and (e) certain events relating to reorganization,  bankruptcy and insolvency of
the Company, and the appointment of a receiver. (Section 15.01)

         The ISU 1923  Indenture  Trustees  are  required  to give notice of any
default to bondholders within 90 days after the occurrence thereof,  unless such
default is cured before the giving of such notice (except in the case of certain
defaults,  notice of which is not to be given by such Trustees until at least 60
days after the  occurrence  thereof).  The ISU  Indenture  Trustees may withhold
notice of default (except in the payment of principal of, or interest or premium
(if any) on, any of the bonds or in the payment of any sinking  fund or purchase
fund installment) if the ISU Corporate Trustee  determines that such withholding
is in the interest of the bondholders. (Section 17.11)


                                       25





         Holders of a majority of the principal amount of outstanding  bonds may
direct the method,  time, and place of conducting any proceedings for any remedy
available to the ISU Indenture  Trustees for any sale of the property subject to
the  lien of the ISU  1923  Indenture,  or for the  foreclosure  of the ISU 1923
Indenture,  or for the appointment of a receiver, or for the taking of any other
action  authorized  by the  ISU  1923  Indenture  in  respect  of a  default  or
refraining therefrom. (Section 15.05)

         No  holder  of any bond or coupon  shall  have any right to any  remedy
under the ISU 1923 Indenture,  unless such holder has given prior written notice
to the ISU 1923 Indenture  Trustees of the default,  25% in aggregate  principal
amount of the bonds  outstanding  have made  prior  written  request  to the ISU
Corporate  Trustee  and have  afforded  reasonable  opportunity  to the 1923 ISU
Indenture  Trustees to pursue the remedy in the trustees' own names, and the ISU
1923 Indenture Trustees have been offered adequate indemnity for costs, expenses
and liabilities which may be incurred thereby. (Section 15.15)

         The  Company  must file an annual  Certificate  with the ISU  Corporate
Trustee as to  compliance  with the  conditions  and  covenants  of the ISU 1923
Indenture  and as to the absence of default with respect to any of the covenants
contained in the ISU 1923 Indenture. (Section 14.03)

Voting of Class "A" Bonds

         The Trustee will, as holder of any Class "A" Bonds issued under the ISU
1923  Indenture,  attend  such  meetings  of  bondholders  under  the  ISU  1923
Indenture,  or deliver its proxy in connection  therewith,  as relate to matters
with respect to which it is entitled to vote or consent.  The Mortgage  provides
that,  so long as no Event of Default as defined in the Mortgage has occurred or
is  continuing,  the Trustee  will,  as holder of such Class "A" Bonds,  vote or
consent:

         (a)      in  favor  of  amendments  or  modifications  to the ISU  1923
Indenture of substantially the same tenor and effect as the following,  together
with all amendments and modifications required to effectuate the following:

                  (i)      to  provide  that,  whenever  the ISU 1923  Indenture
                           requires  authorization  by, or a resolution  of, the
                           Board of Directors or an Executive  Committee thereof
                           for  the  issuance  of  a  series  of  bonds  or  the
                           determination  of the terms thereof,  the requirement
                           shall  be  satisfied  if the  action  taken  would be
                           sufficient for the issuance of a series of bonds,  or
                           the  determination  of the terms  thereof,  under the
                           Mortgage;

                  (ii)     to  eliminate  the  maintenance  fund and to  provide
                           that,  to the  extent  Property  Additions  or  bonds
                           previously  outstanding  have been taken as a credit,
                           or cash held by the ISU  Corporate  Trustee  has been
                           deposited,  in each case to satisfy  the  Maintenance
                           Fund   Requirements,    such   Property    Additions,
                           previously outstanding bonds and cash may be used for
                           any purpose under the ISU 1923  Indenture  (including
                           as a basis for the  issuance of bonds) as if they had
                           never been so credited or deposited;

                  (iii)    to permit  bonds to be issued in a  principal  amount
                           equal to 75%, instead of 60%, of Property Additions;

                  (iv)     to eliminate  the Net Earnings  requirements  for all
                           purposes,  including in connection  with the issuance
                           of bonds;

                  (v)      to broaden the definition of "Property  Additions" to
                           include  property  not  used  by the  Company  in its
                           electric, gas or steam business;

                  (vi)     to permit the release,  without compliance with other
                           provisions  of  the  ISU  1923   Indenture,   of  any
                           property,   provided  that  (1)  the  fair  value  of
                           property   released   pursuant  to  this   provision,
                           together with the fair value of all other property so
                           released in the then current calendar year, shall not
                           exceed an amount  equal to the greater of  $5,000,000
                           and 3% of the  aggregate  principal  amount  of bonds
                           then outstanding under the ISU 1923 Indenture;


                                       26





                  (vii)    to permit  the  withdrawal  by the  Company,  without
                           compliance  with  other  provisions  of the ISU  1923
                           Indenture,  of cash in an amount, together with other
                           amounts  paid over to the  Company  pursuant  to this
                           provision in the then current  calendar  year,  up to
                           the  greater of  $5,000,000  and 3% of the  aggregate
                           principal amount of the bonds then outstanding  under
                           the ISU 1923 Indenture;  provided that such cash must
                           be expended for Property Additions;

                  (viii)   to increase  the amount of cash  withdrawable  by the
                           Company on the basis of retired property from 100% of
                           the cost or fair value of such  property  to 133-1/3%
                           of such cost or fair value;

                  (ix)     to raise the  minimum  dollar  amount of any one fire
                           loss  which  must be  payable  to the  ISU  Indenture
                           Trustees  from  $10,000  to an  amount  equal  to the
                           greater  of  $5,000,000   and  3%  of  the  aggregate
                           principal amount of bonds then outstanding  under the
                           ISU 1923 Indenture;

                  (x)      to modify the definition of "defaults"  under the ISU
                           1923  Indenture  to  be  substantially  the  same  as
                           "Events of Default" under the Mortgage;

                  (xi)     to modify the  provisions  of the ISU 1923  Indenture
                           for the  acceleration  of the  maturity  of  bonds to
                           provide  that (1) action by the holders of a majority
                           (rather than the current 25%) in principal  amount of
                           the then outstanding  bonds is required to accelerate
                           the  maturity of all  outstanding  bonds upon default
                           and (2) any such  acceleration  and its  consequences
                           are  automatically  rescinded  (rather  than  at  the
                           option of the holders as is currently  provided) upon
                           the curing of all defaults;

                  (xii)    to reduce  the  quorum  requirements  for  bondholder
                           meetings from 80% to a majority; and

                  (xiii)   to modify the  remedies  provisions  to increase to a
                           majority  from 25% the  percentage  of the  principal
                           amount  of  bonds,  the  holders  of which  must have
                           requested  the ISU  Corporate  Trustee to take action
                           before individual holders may institute suits against
                           the Company.

         (b)      with respect to any other  amendments or  modifications to the
ISU 1923 Indenture, as follows:

         the  Trustee  will vote all Class "A" Bonds  issued  under the ISU 1923
         Indenture   then  held  by  it,  or  consent  with   respect   thereto,
         proportionately  with  what is  reasonably  believed  to be the vote or
         consent of the  holders of all other  bonds  outstanding  under the ISU
         1923  Indenture,  the holders of which are eligible to vote or consent;
         provided,  however, that (i) at any time such Class "A" Bonds under the
         ISU 1923  Indenture  held by the Trustee  constitute  a majority of the
         principal amount of the Outstanding  bonds under the ISU 1923 Indenture
         or (ii) at any time such Class "A" Bonds held by the Trustee constitute
         less  than  such a  majority  but  there  is a  proposed  amendment  or
         modification  of the ISU 1923 Indenture  which, if it were an amendment
         or  modification  of the Mortgage (See  "DESCRIPTION  OF THE COLLATERAL
         TRUST BONDS - Modification of the Mortgage"), would require the consent
         of Holders,  then, in either case, the Trustee may only vote such Class
         "A"  Bonds in  accordance  with the vote of the  Holders  of at least a
         majority of the principal  amount of the securities  casting a vote and
         shall seek that vote in accordance  with the provisions of the Mortgage
         applicable  to required  votes of Holders in respect of  amendments  or
         modifications to the Mortgage.


                    DESCRIPTION OF THE SUBORDINATED INDENTURE

General


                                       27





         The  Securities may be issued in one or more series under the Indenture
(For Unsecured  Subordinated  Debt  Securities) (the  "Subordinated  Indenture")
between the  Company and The First  National  Bank of Chicago,  as trustee  (the
"Subordinated  Indenture Trustee").  The summaries of the Subordinated Indenture
set forth below do not purport to be  complete  and are subject to the  detailed
provisions of the Subordinated  Indenture,  a copy of which was previously filed
with the Commission,  is listed as an exhibit to the  Registration  Statement of
which  this  Prospectus  is a part,  and is  incorporated  herein by  reference.
Capitalized  terms used in this section which are not otherwise  defined in this
Prospectus  shall  have  the  meanings  ascribed  to  them  in the  Subordinated
Indenture.  Wherever particular  provisions or terms defined in the Subordinated
Indenture are referred to in this section,  such  provisions or definitions  are
incorporated  by reference as part of the statements  made in this section,  and
such statements are qualified in their entirety by such reference. References to
article and section numbers herein,  unless otherwise indicated,  are references
to article and section numbers of the Subordinated Indenture.

         The   Securities   issued  under  the   Subordinated   Indenture   (the
"Subordinated  Debentures") will be unsecured,  subordinated  obligations of the
Company and shall not be afforded any protection under the Mortgage, pursuant to
which various series of Collateral Trust Bonds may be issued.  Reference is made
to the Prospectus Supplement,  or a supplement thereto, for a description of the
following  terms of the series of  Subordinated  Debentures  in respect of which
this Prospectus is being delivered: (1) the title of such series of Subordinated
Debentures; (2) any limit on the aggregate principal amount of such Subordinated
Debentures or the series of which they are a part;  (3) the Person or Persons to
whom interest on the Subordinated  Debentures of such series shall be payable if
other  than  the  Persons  in  whose  names  such  Subordinated  Debentures  are
registered;  (4)  the  date or  dates  on  which  the  principal  of any of such
Subordinated  Debentures  will be payable;  (5) the rate or rates  (which may be
fixed or variable)  and/or the method of  determination of such rate or rates at
which any of such Subordinated  Debentures will bear interest,  if any, the date
or dates from which any such interest will accrue, the Interest Payment Dates on
which any such interest will be payable and the Regular Record Date for any such
interest payable on any Interest Payment Date; (6) the place or places where (i)
the  principal  of,  premium,  if any, and interest on any of such  Subordinated
Debentures will be payable,  (ii)  registration of transfer of such Subordinated
Debentures may be effected,  (iii) exchanges of such Subordinated Debentures may
be  effected  and (iv)  notices and demands to or upon the Company in respect of
such  Subordinated  Debentures  may be served;  the Security  Registrar for such
Subordinated  Debentures  and, if such is the case,  that the  principal of such
Subordinated  Debentures  shall be  payable  without  presentment  or  surrender
thereof;  (7) the period or periods within which, or the date or dates on which,
the price or prices at which and the terms and conditions upon which any of such
Subordinated  Debentures may be redeemed,  in whole or in part, at the option of
the Company; (8) the obligation or obligations, if any, of the Company to redeem
or purchase any of such Subordinated  Debentures pursuant to any sinking fund or
other  mandatory  redemption  provisions or at the option of the Holder thereof,
and the period or periods within which, or the date or dates on which, the price
or  prices  at  which  and the  terms  and  conditions  upon  which  any of such
Subordinated  Debentures  shall be redeemed or  purchased,  in whole or in part,
pursuant to such obligation,  and applicable exceptions to the requirements of a
notice of  redemption  in the case of mandatory  redemption or redemption at the
option of the Holder;  (9) the  denominations in which any of such  Subordinated
Debentures  will be  issuable,  if other  than  denominations  of $1,000 and any
integral multiple thereof; (10) if other than the currency of the United States,
the currency or currencies,  including composite currencies, in which payment of
the  principal  of and any  premium  and  interest  on any of such  Subordinated
Debentures will be payable;  (11) if the principal of or any premium or interest
on any of such Subordinated  Debentures is to be payable, at the election of the
Company or the Holder  thereof,  in a coin or currency  other than in which such
Subordinated  Debentures are stated to be payable,  the period or periods within
which and the terms and conditions upon which, such election is to be made; (12)
if the  principal  of or  premium,  if any,  or  interest  on such  Subordinated
Debentures  are to be  payable,  or are to be  payable  at the  election  of the
Company or a Holder  thereof,  in  securities  or other  property,  the type and
amount of such securities or other property, or the formulary or other method or
other means by which such amount shall be determined,  and the period or periods
within which,  and the terms and conditions upon which, any such election may be
made;  (13) if the amount  payable in respect of  principal of or any premium or
interest on any of such Subordinated Debentures may be determined with reference
to an index  or  other  fact or event  ascertainable  outside  the  Subordinated
Indenture,  the manner in which such amounts will be  determined;  (14) if other
than the principal amount thereof, the portion of the principal amount of any of
such  Subordinated  Debentures  which  shall  be  payable  upon  declaration  of
acceleration of the Maturity thereof; (15) any addition to the Events of Default
applicable  to any of  such  Subordinated  Debentures  and any  addition  to the
covenants  of the Company  for the  benefit of the Holders of such  Subordinated
Debentures;  (16)  the  terms,  if any,  pursuant  to  which  such  Subordinated
Debentures  may be converted  into or exchanged  for shares of capital  stock or


                                       28





other  securities of the Company or any other Person;  (17) the  obligations  or
instruments,  if any,  which shall be considered to be Eligible  Obligations  in
respect of such  Subordinated  Debentures  denominated  in a currency other than
Dollars or in a composite currency, and any additional or alternative provisions
for  the  reinstatement  of  the  Company's  indebtedness  in  respect  of  such
Subordinated  Debentures after the satisfaction and discharge  thereof;  (18) if
such  Subordinated  Debentures  are  to  be  issued  in  global  form,  (i)  any
limitations  on the  rights  of the  Holder  or  Holders  of  such  Subordinated
Debentures  to transfer or exchange  the same or to obtain the  registration  of
transfer  thereof,  (ii) any  limitations on the rights of the Holder or Holders
thereof to obtain certificates  therefor in definitive form in lieu of temporary
form  and  (iii)  any and all  other  matters  incidental  to such  Subordinated
Debentures;  (19) if such  Subordinated  Debentures are to be issuable as bearer
securities;  (20)  any  limitations  on  the  rights  of  the  Holders  of  such
Subordinated  Debentures to transfer or exchange such Subordinated Debentures or
to obtain the registration of transfer thereof,  and if a service charge will be
made  for  the  registration  of  transfer  or  exchange  of  such  Subordinated
Debentures,  the amount or terms thereof;  (21) any exceptions to the provisions
governing  payments due on legal holidays or any variations in the definition of
Business Day with respect to such  Subordinated  Debentures;  and (22) any other
terms of such  Subordinated  Debentures of such series,  or any Tranche thereof,
not  inconsistent  with the provisions of the Subordinated  Indenture.  (Section
301)

         Subordinated  Debentures  may be sold at a substantial  discount  below
their  principal  amount.  Certain  special  United  States  federal  income tax
considerations  applicable to Subordinated  Debentures sold at an original issue
discount may be described in the applicable Prospectus Supplement.  In addition,
certain  special  United  States  federal  income  tax or  other  considerations
applicable to any Subordinated Debentures which are denominated in a currency or
currency unit other than Dollars may be described in the  applicable  Prospectus
Supplement.

         Except as may otherwise be described in the Prospectus Supplement,  the
covenants  contained in the  Subordinated  Indenture would not afford Holders of
Subordinated   Debentures   protection  in  the  event  of  a   highly-leveraged
transaction or change of control involving the Company.



                                       29




Subordination

         The Subordinated  Indenture  provides that payment of the principal of,
premium,  if any, and interest on Subordinated  Debentures is  subordinated  and
subject  in  right  of  payment  to the  prior  payment  in full  of all  Senior
Indebtedness  (as  defined  below)  of  the  Company,  all  as  provided  in the
Subordinated  Indenture. No payment of principal of (including redemption of and
sinking fund payments), premium, if any, or interest on, Subordinated Debentures
may be made if payment of principal,  premium,  interest or any other payment on
any Senior  Indebtedness is not made when due, any applicable  grace period with
respect to such  default has ended and such default has not been cured or waived
or ceased to exist,  or if the  maturity  on any  Senior  Indebtedness  has been
accelerated  because of default.  Upon any distribution of assets of the Company
to creditors upon any dissolution,  winding up,  liquidation or  reorganization,
whether voluntary or involuntary or in bankruptcy,  insolvency,  receivership or
other  proceedings,  all principal of,  premium,  if any, and interest due or to
become due on, all Senior  Indebtedness  must be paid in full before any payment
on the  Subordinated  Debentures.  Subject to the  payment in full of all Senior
Indebtedness,  the rights of the  holders  of  Subordinated  Debentures  will be
subrogated  to the  rights of the  holders  of Senior  Indebtedness  to  receive
payments or distributions  applicable to Senior  Indebtedness  until all amounts
owing on Subordinated Debentures are paid in full. (Sections 1501 - 1504)

         The term  "Senior  Indebtedness"  means  all  obligations  (other  than
non-recourse  obligations  and the  indebtedness  issued under the  Subordinated
Indenture)  of, or  guaranteed  or assumed by, the Company for  borrowed  money,
including both senior and  subordinated  indebtedness  for borrowed money (other
than the Subordinated  Debentures),  or for the payment of money relating to any
lease which is capitalized on the consolidated  balance sheet of the Company and
its subsidiaries in accordance with generally accepted accounting principles, or
evidenced by bonds, debentures,  notes or other similar instruments, and in each
case, amendments, renewals, extensions, modifications and refundings of any such
indebtedness or obligations, whether existing as of the date of the Subordinated
Indenture or  subsequently  incurred by the Company.  (Section  101) Such Senior
Indebtedness  shall  continue  to be Senior  Indebtedness  and  entitled  to the
benefits  of  the  subordination   provisions  irrespective  of  any  amendment,
modification or waiver of any terms of such Senior Indebtedness. (Section 1509)

         The  Subordinated  Indenture  does not  limit the  aggregate  amount of
Senior   Indebtedness  that  may  be  issued.  As  of  March  31,  1997,  Senior
Indebtedness of the Company aggregated approximately $708 million.


                                       30





Form, Exchange, and Transfer

         Unless  otherwise  specified in the applicable  Prospectus  Supplement,
Subordinated Debentures of each series will be issuable only in fully registered
form without coupons and in  denominations  of $1,000 and any integral  multiple
thereof. (Sections 201 and 302)

         At the option of the Holder,  subject to the terms of the  Subordinated
Indenture  and the  limitations  applicable to global  securities,  Subordinated
Debentures of any series will be exchangeable for other Subordinated  Debentures
of the  same  series,  of any  authorized  denomination  and of like  tenor  and
aggregate principal amount. (Section 305)

         Subject to the terms of the Subordinated  Indenture and the limitations
applicable to global  securities,  Subordinated  Debentures may be presented for
exchange as  provided  above for  registration  of  transfer  (duly  endorsed or
accompanied  by a duly  executed  instrument  of  transfer) at the office of the
Security  Registrar or at the office of any  transfer  agent  designated  by the
Company for such purpose.  Unless otherwise indicated, no service charge will be
made for any  registration of transfer or exchange of  Subordinated  Debentures,
but the  Company  may require  payment of a sum  sufficient  to cover any tax or
other governmental  charge payable in connection  therewith.  Every Subordinated
Debenture  presented or  surrendered  for  registration  of transfer or exchange
shall (if so required by the Company, the Subordinated  Indenture Trustee or the
Security  Registrar)  be duly  endorsed or  accompanied  by an executed  written
instrument of transfer in form  satisfactory  to the Company,  the  Subordinated
Indenture  Trustee or the Security  Registrar.  (Section 305) Any transfer agent
(in addition to the Security Registrar)  initially designated by the Company for
any  Subordinated   Debenture  will  be  named  in  the  applicable   Prospectus
Supplement.  The Company may at any time designate additional transfer agents or
rescind the  designation of any transfer agent or approve a change in the office
through which any transfer agent acts,  except that the Company will be required
to  maintain a transfer  agent in each  Place of  Payment  for the  Subordinated
Debentures  of each series.  The Company may perform all functions of any office
or agency. (Section 602)

         The Company  shall not be required to execute or register  the transfer
of or the exchange of any Subordinated Debenture, or any Tranche thereof, during
a  period  of  15  days  preceding  the  notice  to  be  given  identifying  the
Subordinated Debenture called for redemption,  or any Subordinated Debentures so
selected for redemption,  in whole or in part, except the unredeemed  portion of
any such Subordinated Debenture being redeemed in part. (Section 305)

Payment and Paying Agent

         Unless  otherwise  indicated in the applicable  Prospectus  Supplement,
payment of interest on a  Subordinated  Debenture on any  Interest  Payment Date
will be made to the person in whose name such Subordinated  Debenture (or one or
more  Predecessor  Securities)  is  registered  at the close of  business on the
Regular Record Date for such interest. (Section 307)

         Unless  otherwise  indicated in the applicable  Prospectus  Supplement,
principal of and any  interest on the  Subordinated  Debentures  of a particular
series  will be payable at the office of such Paying  Agent or Paying  Agents as
the Company may designate for such purpose from time to time.  Unless  otherwise
indicated in the applicable Prospectus Supplement, the corporate trust office of
the Subordinated  Indenture  Trustee in New York, New York will be designated as
the  Company's  sole  Paying  Agent for  payment  with  respect to  Subordinated
Debentures of each series.  Any other Paying Agents initially  designated by the
Company for the Subordinated  Debentures of a particular series will be named in
the  applicable  Prospectus  Supplement.  The Company may at any time  designate
additional  Paying  Agents or rescind  the  designation  of any Paying  Agent or
approve a change in the office through which any Paying Agent acts,  except that
the Company will be required to maintain a Paying Agent in each Place of Payment
for the Subordinated Debentures of a particular series. (Section 602)

         Any moneys  deposited  by the  Company  with the  Trustee or any Paying
Agent for the  payment of the  principal  of or any  premium or  interest on any
Subordinated  Debenture  which  remains  unclaimed at the end of two years after
such  principal,  premium or interest has become due and payable will be paid to
the  Company,  and the Holder of such  Subordinated  Debenture,  as an unsecured
general  creditor and not as a Holder,  thereafter  may look only to the Company
for payment thereof. (Section 603)


                                       31





Redemption

         Any terms for the  optional or  mandatory  redemption  of  Subordinated
Debentures  will be set  forth  in the  applicable  Prospectus  Supplement  or a
supplement  thereto.  Except as shall  otherwise  be provided in the  applicable
Prospectus   Supplement  with  respect  to  Subordinated   Debentures  that  are
redeemable  at the  option  of  the  Holder,  Subordinated  Debentures  will  be
redeemable  only upon notice by mail not less than 30 days nor more than 60 days
prior to the date fixed for redemption,  and, if less than all the  Subordinated
Debentures  of a  series,  or  any  Tranche  thereof,  are to be  redeemed,  the
particular  Subordinated  Debentures  to be  redeemed  will be  selected  by the
Securities  Registrar  by such  method as shall be provided  for any  particular
series,  or in the  absence  of any such  provision,  by such  method  of random
selection as the Security  Registrar deems fair and  appropriate.  (Sections 403
and 404)

         Any notice of  redemption  at the option of the  Company may state that
such redemption will be conditional  upon receipt by the Paying Agent or Agents,
on or prior to the date fixed for such  redemption,  of money  sufficient to pay
the principal of and premium, if any, and interest, if any, on such Subordinated
Debentures and that if such money has not been so received,  such notice will be
of no force and effect  and the  Company  will not be  required  to redeem  such
Subordinated Debentures. (Section 404)

Consolidation, Merger, Conveyance, or other Transfer

         Under the terms of the  Subordinated  Indenture,  the  Company  may not
consolidate  with or merge into any other  corporation  or convey,  transfer  or
lease its  properties  and assets  substantially  as an  entirety to any Person,
unless  (i) the  corporation  formed  by such  consolidation  or into  which the
Company is merged or the Person which  acquires by  conveyance  or transfer,  or
which  leases,  the  properties  and assets of the Company  substantially  as an
entirety shall be a Person organized and existing under the laws of any domestic
jurisdiction  and  shall  expressly  assume  the  Company's  obligations  on the
Subordinated Debentures and under the Subordinated  Indenture,  (ii) immediately
after giving effect to the transaction,  no Event of Default shall have occurred
and be continuing, and (iii) the Company will have delivered to the Subordinated
Indenture Trustee an Officer's Certificate and an Opinion of Counsel as provided
in the Subordinated Indenture. (Section 1101)

Events of Default

         Each of the  following  will  constitute  an Event of Default under the
Subordinated  Indenture with respect to  Subordinated  Debentures of any series:
(a) failure to pay any interest on any  Subordinated  Debentures  of such series
within  60 days  after  the same  becomes  due and  payable;  provided,  that an
extension of an interest payment period by the Company permitted by the terms of
the series shall not constitute a failure to pay interest for this purpose;  (b)
failure to pay principal of or premium, if any, on any Subordinated Debenture of
such series  within three  business days after the same becomes due and payable;
(c)  failure to  perform  or breach of any other  covenant  or  warranty  of the
Company in the Subordinated  Indenture (other than a covenant or warranty of the
Company in the  Subordinated  Indenture  solely  for the  benefit of one or more
series of  Subordinated  Debentures  other than such  series)  for 60 days after
written notice to the Company by the Subordinated  Indenture Trustee,  or to the
Company and the Subordinated Indenture Trustee by the Holders of at least 33% in
principal amount of the Subordinated Debentures of such series Outstanding under
the  Subordinated  Indenture  as provided  in the  Subordinated  Indenture;  (d)
certain events of bankruptcy,  insolvency or  reorganization;  and (e) any other
Event of Default specified in the applicable  Prospectus Supplement with respect
to Subordinated Debentures of a particular series. (Section 801)

         An Event of Default with respect to the Subordinated Debentures may not
necessarily  constitute  an Event of Default  with  respect to the  Subordinated
Debentures of any other series issued under the Subordinated Indenture.

         If an Event of  Default  with  respect  to any  series of  Subordinated
Debentures  occurs and is  continuing,  then either the  Subordinated  Indenture
Trustee  or the  Holders  of  not  less  than  33% in  principal  amount  of the
Outstanding  Subordinated  Debentures  of such series may declare the  principal
amount  (or  if  the  Subordinated   Debentures  of  such  series  are  Discount
Securities,  such portion of the principal  amount hereof as may be specified in
the applicable Prospectus  Supplement) of all of the Subordinated  Debentures of
such series to be due and payable  immediately;  provided,  however,  that if an
Event of Default  occurs and is continuing  with respect to more than one series
of Subordinated Debentures, the Subordinated Indenture Trustee or the Holders of
not less than 33% in aggregate principal amount of the Outstanding Securities of
all  such  series,  considered  as one  class,  may  make  such  declaration  of
acceleration  and not the Holders of the  Subordinated  Debentures of any one of
such series.


                                       32





       Subject to the provisions of the Subordinated Indenture relating to the
duties of the Subordinated  Indenture  Trustee in case an Event of Default shall
occur and be continuing,  the  Subordinated  Indenture  Trustee will be under no
obligation  to  exercise  any of its  rights  or powers  under the  Subordinated
Indenture at the request or  direction  of any Holder,  unless such Holder shall
have  offered to the  Subordinated  Indenture  Trustee  reasonable  security  or
indemnity.  (Section 903) Subject to such provisions of the  indemnification  of
the  Subordinated  Indenture  Trustee,  the Holders of a majority  in  principal
amount of the  Outstanding  Subordinated  Debentures of any series will have the
right to direct the time,  method and place of conducting any proceeding for any
remedy available to the Subordinated  Indenture Trustee, or exercising any trust
or power conferred on the Subordinated  Indenture  Trustee,  with respect to the
Subordinated Debentures of that series. (Section 812)

         No Holder of a Subordinated Debenture of any series will have any right
to institute any proceeding with respect to the Subordinated  Indenture,  or for
the appointment of a receiver or a trustee,  of for any other remedy thereunder,
unless (i) such Holder has  previously  given written notice to the Trustee of a
continuing Event of Default with respect to the Subordinated  Debentures of such
series,  (ii) the  Holders of not less than a majority  in  aggregate  principal
amount of the  Outstanding  Subordinated  Debentures  of such  series  have made
written  request  to the  Subordinated  Indenture  Trustee,  and such  Holder or
Holders have offered reasonable indemnity to the Subordinated Indenture Trustee,
to institute  such  proceeding as trustee and (iii) the  Subordinated  Indenture
Trustee has failed to institute such  proceeding,  and has not received from the
Holders  of  a  majority  in  aggregate  principal  amount  of  the  Outstanding
Subordinated  Debentures  of that  series a  direction  inconsistent  with  such
request,  within 60 days after such  notice,  request and offer.  (Section  807)
However,  such  limitations  do not apply to a suit  instituted by a Holder of a
Subordinated Debenture for the enforcement of payment of the principal of or any
premium or interest on such  Subordinated  Debenture on or after the  applicable
due date specified in such Subordinated Debenture. (Section 808)

         The Company will be required to furnish to the  Subordinated  Indenture
Trustee  annually,  not later than  October 1 in each year,  a  statement  by an
appropriate officer as to such officer's  knowledge of the Company's  compliance
with all  conditions  and  covenants  under  the  Subordinated  Indenture,  such
compliance to be determined without regard to any period of grace or requirement
of notice under the Subordinated Indenture. (Section 606)

Right to Cure

         At any time after the declaration of  acceleration  with respect to the
Subordinated  Debentures  of any series  has been made and before a judgment  or
decree for  payment of the money due has been  obtained,  the Event or Events of
Default giving rise to such  declaration of acceleration  will,  without further
act, be deemed to have been waived,  and such  declaration and its  consequences
will, without further act, be deemed to have been rescinded and annulled, if

         (a)      the  Company  has  paid or  deposited  with  the  Subordinated
Indenture Trustee a sum sufficient to pay

                  (1)      all overdue interest on all  Subordinated  Debentures
         of such series;

                  (2)      the  principal  of  and  premium,   if  any,  on  any
         Subordinated  Debentures of such series which have become due otherwise
         than by such  declaration of acceleration  and interest  thereon at the
         rate or rates prescribed therefor in such Subordinated Debentures;

                  (3)      interest  upon overdue  interest at the rate or rates
         prescribed therefor in such Subordinated Debentures, to the extent that
         payment of such interest is lawful; and


                                       33





                  (4)      all amounts due to the Subordinated Indenture Trustee
         under the Subordinated Indenture; and

         (b)  any  other  Event  or  Events  of  Default  with  respect  to  the
Subordinated  Debentures  of such  series,  other  than the  non-payment  of the
principal  of the  Subordinated  Debentures  of such series which has become due
solely  by such  declaration  of  acceleration,  have  been  cured or  waived as
provided in the Subordinated Indenture. (Section 802)

Modification and Waiver

         Without  the  consent of any  Holder of  Subordinated  Debentures,  the
Company  and the  Subordinated  Indenture  Trustee  may  enter  into one or more
supplemental  indentures to the Subordinated  Indenture for any of the following
purposes:  (a) to evidence  the  assumption  by any  permitted  successor to the
Company of the  covenants of the Company in the  Subordinated  Indenture and the
Subordinated  Debentures;  or (b) to add one or more covenants of the Company or
other  provisions  for  the  benefit  of the  Holders  of all or any  series  of
Outstanding Subordinated Debentures or to surrender any right or power conferred
upon the Company by the  Subordinated  Indenture;  or (c) to add any  additional
Events of Default with respect to all or any series of Outstanding  Subordinated
Debentures;  or (d) to change or eliminate  any  provision  of the  Subordinated
Indenture or to add any new provision to the  Subordinated  Indenture,  provided
that if such change, elimination or addition will adversely affect the interests
of the Holders of Subordinated Debentures of any series in any material respect,
such change,  elimination or addition will become effective with respect to such
series only when the consent of the Holders of such series so affected  has been
obtained or when there is no  Subordinated  Debenture  of such series  remaining
Outstanding  under the  Subordinated  Indenture;  or (e) to  provide  collateral
security for the Subordinated Debentures;  or (f) to establish the form or terms
of  Subordinated  Debentures  of any  series as  permitted  by the  Subordinated
Indenture;  or (g) to provide  for the  authentication  and  delivery  of bearer
securities  and coupons  appertaining  thereto  representing  interest,  if any,
thereon and for the procedures for the  registration,  exchange and  replacement
thereof and for giving of notice to, and the solicitation of the vote or consent
of, the Holders thereof,  and for any and all other matters incidental  thereto;
or (h) to evidence and provide for the  acceptance of  appointment of a separate
or successor  Subordinated  Indenture  Trustee under the Subordinated  Indenture
with respect to the Subordinated  Debentures of one or more series and to add or
to  change  any of the  provisions  of the  Subordinated  Indenture  as shall be
necessary to provide for or to facilitate the administration of the trusts under
the Subordinated  Indenture by more than one trustee;  or (i) to provide for the
procedures  required to permit the  utilization of a  noncertificated  system of
registration  for any series of  Subordinated  Debentures;  or (j) to change any
place where (1) the principal of and premium,  if any, and interest,  if any, on
any Subordinated  Debentures shall be payable,  (2) any Subordinated  Debentures
may be surrendered for  registration of transfer or exchange and (3) notices and
demands to or upon the  Company in respect of  Subordinated  Debentures  and the
Subordinated  Indenture may be served; or (k) to cure any ambiguity,  to correct
or supplement any defective or  inconsistent  provision or to make or change any
other  provisions  with  respect  to matters  and  questions  arising  under the
Subordinated  Indenture,  provided such changes or additions shall not adversely
affect the interests of the Holders of Subordinated  Debentures of any series in
any material respect. (Section 1201)

         The Holders of not less than a majority in aggregate  principal  amount
of the Outstanding Subordinated Debentures of any series may waive compliance by
the Company with certain restrictive  provisions of the Subordinated  Indenture.
(Section 607) The Holders of not less than a majority in principal amount of the
Outstanding  Subordinated  Debentures  of any series may waive any past  default
under the Subordinated Indenture,  except a default in the payment of principal,
premium or interest and certain  covenants and  provisions  of the  Subordinated
Indenture  that  cannot be  modified  or be amended  without  the consent of the
Holder of each  Outstanding  Subordinated  Debenture  of such  series  affected.
(Section 813)

         Without  limiting  the  generality  of  the  foregoing,  if  the  Trust
Indenture Act of 1939, as amended (the "Trust  Indenture Act"), is amended after
the date of the  Subordinated  Indenture in such a way as to require  changes to
the Subordinated Indenture or the incorporation therein of additional provisions
or so as to permit changes to, or the elimination of,  provisions  which, at the
date of the Subordinated  Indenture or at any time thereafter,  were required by
the Trust  Indenture  Act to be contained  in the  Subordinated  Indenture,  the
Subordinated  Indenture  will be deemed to have been amended so as to conform to
such amendment or to effect such changes or elimination, and the Company and the
Subordinated  Indenture  Trustee may, without the consent of any Holders,  enter
into one or more  supplemental  indentures to evidence or effect such amendment.
(Section 1201)


                                       34





         Except as provided above, the consent of the Holders of not less than a
majority in aggregate  principal  amount of the  Subordinated  Debentures of all
series then Outstanding, considered as one class, is required for the purpose of
adding any provisions to, or changing in any manner,  or eliminating  any of the
provisions of, the Subordinated  Indenture  pursuant to one or more supplemental
indentures;  provided,  however,  that  if  less  than  all  of  the  series  of
Subordinated   Debentures  Outstanding  are  directly  affected  by  a  proposed
supplemental  indenture,  then the consent  only of the Holders of a majority in
aggregate principal amount of Outstanding  Subordinated Debentures of all series
so directly affected,  considered as one class, will be required;  and provided,
further,  that if the Subordinated  Debentures of any series have been issued in
more  than one  Tranche  and if the  proposed  supplemental  indenture  directly
affects  the  rights of the  Holders  of one or more,  but less  than all,  such
Tranches,  then the  consent  only of the  Holders  of a majority  in  aggregate
principal amount of the Outstanding  Subordinated  Debentures of all Tranches so
directly  affected,  considered  as one class,  will be  required;  and provided
further, that no such supplemental  indenture may (a) change the Stated Maturity
of the  principal  of, or any  installment  of  principal of or interest on, any
Subordinated  Debenture,  or reduce the principal  amount thereof or the rate of
interest  thereon  (or the amount of any  installment  of  interest  thereon) or
change the method of  calculating  such rate or reduce any premium  payable upon
the  redemption  thereof,  or reduce the amount of the principal of any Discount
Security that would be due and payable upon a  declaration  of  acceleration  of
Maturity  or  change  the coin or  currency  (or  other  property)  in which any
Subordinated  Debenture  or any premium or the interest  thereon is payable,  or
impair the right to institute suit for the enforcement of any such payment on or
after the Stated  Maturity  of any  Subordinated  Debenture  (or, in the case of
redemption,  on or after the  redemption  date)  without,  in any such case, the
consent of the Holder of such Subordinated Debenture,  (b) reduce the percentage
in principal amount of the Outstanding Subordinated Debentures of any series, or
any Tranche  thereof,  the  consent of the Holders of which is required  for any
such supplemental  indenture, or the consent of the Holders of which is required
for any waiver of compliance with any provision of the Subordinated Indenture or
any default  thereunder and its  consequences,  or reduce the  requirements  for
quorum or voting,  without,  in any such case, the consent of the Holder of each
Outstanding  Subordinated  Debenture  of such series or  Tranche,  or (c) modify
certain of the provisions of the Subordinated Indenture relating to supplemental
indentures,  waivers of certain  covenants  and  waivers of past  defaults  with
respect to the  Subordinated  Debentures of any series,  or any Tranche thereof,
without the  consent of the Holder of each  Outstanding  Subordinated  Debenture
affected  thereby.  A  supplemental  indenture  which changes or eliminates  any
covenant or other  provision of the  Subordinated  Indenture which has expressly
been  included  solely  for the  benefit  of one or more  particular  series  of
Subordinated  Debentures or one or more Tranches thereof, or modifies the rights
of the  Holders of  Subordinated  Debentures  of such  series or  Tranches  with
respect to such  covenant or other  provision,  will be deemed not to affect the
rights under the Indenture of the Holders of the Subordinated  Debentures of any
other series or Tranche. (Section 1202)

         The  Subordinated  Indenture  provides that in determining  whether the
Holders  of the  requisite  principal  amount  of the  Outstanding  Subordinated
Debentures have given any request,  demand,  authorization,  direction,  notice,
consent,  or waiver under the Subordinated  Indenture as of any date, or whether
or not a quorum is present at a meeting of Holders, (i) Subordinated  Debentures
owned by the Company or any other  obligor upon the  Subordinated  Debentures or
any Affiliate of the Company or of such other obligor (unless the Company,  such
Affiliate  or  such  obligor  owns  all   Securities   Outstanding   under  this
Subordinated Indenture, or all Outstanding  Subordinated Debentures of each such
series and each such Tranche,  as the case may be, determined  without regard to
this clause (i)) shall be disregarded and deemed not to be Outstanding; (ii) the
principal  amount of a Discount  Security that shall be deemed to be Outstanding
for such purposes shall be the amount of the principal thereof that would be due
and  payable  as of  the  date  of  such  determination  upon a  declaration  of
acceleration of the Maturity thereof as provided in the Subordinated  Indenture;
and (iii) the principal amount of a Subordinated Debenture denominated in one or
more  foreign  currencies  or a  composite  currency  that  will be deemed to be
Outstanding  will be the Dollar  equivalent,  determined  as of such date in the
manner  prescribed for such Subordinated  Debenture,  of the principal amount of
such  Subordinated  Debenture  (or,  in the  case  of a  Subordinated  Debenture
described  in clause  (ii)  above,  of the  amount  described  in such  clause).
(Section 101)

         If  the  Company  shall  solicit  from  Holders  any  request,  demand,
authorization,  direction,  notice, consent,  election, waiver or other Act, the


                                       35





Company may, at its option,  by Board  Resolution,  fix in advance a record date
for the  determination  of  Holders  entitled  to  give  such  request,  demand,
authorization,  direction,  notice, consent,  election, waiver or other Act, but
the Company  shall have no  obligation to do so. If such a record date is fixed,
such request,  demand,  authorization,  direction,  notice,  consent,  election,
waiver or other Act may be given before or after such record date,  but only the
Holders of record at the close of business on the record date shall be deemed to
be Holders for the  purposes of  determining  whether  Holders of the  requisite
proportion of the Outstanding  Subordinated Debentures have authorized or agreed
or consented to such request, demand, authorization, direction, notice, consent,
direction,   waiver  or  other  Act,  and  for  that  purpose  the   Outstanding
Subordinated  Debentures  shall be computed as of the record date.  Any request,
demand, authorization, direction, notice, consent, election, waiver or other Act
of a Holder shall bind every future  Holder of the same  Subordinated  Debenture
and the Holder of every  Subordinated  Debenture issued upon the registration of
transfer  thereof  or in  exchange  therefor  or in lieu  thereof  in respect of
anything  done,  omitted or suffered to be done by the Trustee or the Company in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Subordinated Debenture. (Section 104)

Defeasance

         Unless otherwise indicated in the applicable Prospectus Supplement, any
Subordinated  Debenture, or any portion of the principal amount thereof, will be
deemed to have been paid for purposes of the Subordinated Indenture, and, at the
Company's  election,  the entire  indebtedness of the Company in respect thereof
will be  deemed  to have  been  satisfied  and  discharged,  if  there  has been
irrevocably  deposited  with the  Subordinated  Indenture  Trustee or any Paying
Agent (other than the Company),  in trust:  (a) money in an amount which will be
sufficient,  or (b) Eligible  Obligations  (as  described  below),  which do not
contain  provisions  permitting the redemption or other prepaying thereof at the
option of the issuer  thereof,  the  principal of and the interest on which when
due,  without any regard to  reinvestment  thereof,  will provide  monies which,
together  with  money,  if any,  deposited  with  or  held  by the  Subordinated
Indenture Trustee or such Paying Agent, will be sufficient, or (c) a combination
of (a) and (b) which will be  sufficient,  to pay when due the  principal of and
premium,  if  any,  and  interest,  if  any,  due  and to  become  due  on  such
Subordinated  Debentures  or portions  thereof.  (Section 701) For this purpose,
unless otherwise  indicated in the applicable  Prospectus  Supplement,  Eligible
Obligations  include  direct  obligations  of,  or  obligations  unconditionally
guaranteed by, the United States,  entitled to the benefit of the full faith and
credit thereof, and certificates, depositary receipts or other instruments which
evidence a direct  ownership  interest in such  obligations  or in any  specific
interest or principal payments due in respect thereof. (Section 101)



                                       36




         While the Company knows of no legal  precedent on point, it is possible
that, for federal income tax purposes, any deposit contemplated in the preceding
paragraph could be treated as a taxable  exchange of the related  securities for
an issue of  obligations  of the  trust  or a  direct  interest  in the cash and
securities  held in the trust. In that case,  Holders of such  securities  would
recognize  gain or loss as if the trust  obligations  or the cash or  securities
deposited,  as the case may be, had actually  been  received by them in exchange
for their securities.  In addition, such Holders thereafter would be required to
recognize for federal income tax purposes a share of the income, gain or loss of
the trust.  The amount so required to be recognized  could be different from the
amount  that would be  recognized  in the absence of such  deposit.  Prospective
investors  are  urged to  consult  their  own tax  advisors  as to the  specific
consequences to them of any such deposit.

Resignation of Subordinated Indenture Trustee

         The  Subordinated  Indenture  Trustee  may resign at any time by giving
written  notice  thereof to the  Company or may be removed at any time by Act of
the Holders of a majority in principal  amount of  Subordinated  Debentures then
Outstanding delivered to the Subordinated  Indenture Trustee and the Company. No
resignation or removal of the Subordinated  Indenture Trustee and no appointment
of a successor trustee will become effective until the acceptance of appointment
by a successor  trustee in accordance with the  requirements of the Subordinated
Indenture.  So long as no Event of Default or event which, after notice or lapse
of  time,  or  both,  would  become  an Event of  Default  has  occurred  and is
continuing and except with respect to a Subordinated Indenture Trustee appointed
by Act of the  Holders  of a majority  in  principal  amount of the  Outstanding
Subordinated  Debentures,  if  the  Company  has  delivered  to  the  Trustee  a
resolution  of its Board of Directors  appointing  a successor  trustee and such
successor has accepted  such  appointment  in  accordance  with the terms of the
Subordinated  Indenture,  the Subordinated  Indenture  Trustee will be deemed to
have resigned and the successor will be deemed to have been appointed as trustee
in accordance with the Subordinated Indenture. (Section 910)


                                     37





Notices

         Notices to Holders of Subordinated  Debentures will be given by mail to
the  addresses  of such  Holders  as they may appear in the  Security  Register.
(Section 106)

Title

         The Company,  the Subordinated  Indenture Trustee, and any agent of the
Company or the Subordinated Indenture Trustee may treat the Person in whose name
a Subordinated Debenture is registered as the absolute owner thereof (whether or
not such  Subordinated  Debenture  may be  overdue)  for the  purpose  of making
payment and for all other purposes. (Section 308)

Governing Law

         The  Subordinated  Indenture and the  Subordinated  Debentures  will be
governed by,  construed in accordance  with,  the laws of the State of New York,
except to the  extent  the law of any other  jurisdiction  shall be  mandatorily
applicable. (Section 112)

Limitation on Suits

         The  Subordinated  Indenture  limits a Holder's  right to institute any
proceeding  with respect to the  Subordinated  Indenture,  the  appointment of a
receiver or trustee,  or for any other remedy under the Subordinated  Indenture.
(Section 807)

Maintenance of Properties

         The Subordinated  Indenture  provides that the Company shall cause (or,
with respect to property owned in common with others,  make reasonable effort to
cause) all its  properties  used or useful in the conduct of its  business to be
maintained and kept in good condition,  repair and working order and shall cause
(or,  with  respect to property  owned in common with  others,  make  reasonable
effort to  cause)  to be made all  necessary  repairs,  renewals,  replacements,
betterments and  improvements  thereof,  all as, in the judgment of the Company,
may be necessary so that the business carried on in connection  therewith may be
properly conducted;  provided,  however,  that nothing shall prevent the Company
from  discontinuing,  or  causing  the  discontinuance  of,  the  operation  and
maintenance of any of its properties if such  discontinuance is, in the judgment
of the Company, desirable in the conduct of its business. (Section 605)

Modification of Senior Indebtedness

         In general,  the  holders of Senior  Indebtedness  may,  without in any
manner  affecting the  subordination of the payment of principal of and premium,
if any, and interest,  if any, on the Subordinated  Debentures in their absolute
discretion  agree  with the  Company  to change  the  manner,  place or terms of
payment,  change or extend the time of payment of, or renew or alter, any Senior
Indebtedness, or amend or supplement any instrument pursuant to which any Senior
Indebtedness  is issued,  or exercise or refrain  from  exercising  any other of
their rights under the Senior Indebtedness  including,  without limitation,  the
waiver of default  thereunder,  all without notice to or assent from the Holders
or the Trustee. (Section 1509)

Relationship with the Subordinated Indenture Trustee

         See "DESCRIPTION OF THE COLLATERAL TRUST BONDS -- Relationship with the
Trustee" for a description  of certain  relationships  between the  Subordinated
Indenture Trustee and the Company.


                                       38





                                GLOBAL SECURITIES

         Some or all of the  Securities  of any  series may be  represented,  in
whole or in part, by one or more global securities  (each, a "Global  Security")
which will have an aggregate  principal  amount equal to that of the  Securities
represented  thereby.  Each Global  Security will be registered in the name of a
depositary (the  "Depositary") or a nominee thereof identified in the applicable
Prospectus  Supplement,  will be deposited with such  Depositary or nominee or a
custodian  therefor  and  will  bear a  legend  regarding  the  restrictions  on
exchanges and  registration of transfer  thereof  referred to below and any such
other  matters as may be provided for  pursuant to the Mortgage or  Subordinated
Indenture, as the case may be.

         As long as the Depositary,  or its nominee, is the registered holder of
a Global Security,  the Depositary or such nominee,  as the case may be, will be
considered the sole owner and holder of such Global  Security and the Securities
represented  thereby for all  purposes  under the  Mortgage or the  Subordinated
Indenture,  as the case may be.  Except  in  limited  circumstances,  owners  of
beneficial  interests  in a Global  Security  will not be  entitled to have such
Global Security or any Securities represented thereby registered in their names,
will not  receive or be entitled to receive  physical  delivery of  certificated
Securities  in exchange  therefor and will not be considered to be the owners or
holders of such Global  Security or any Securities  represented  thereby for any
purpose  under  the  Securities  or,  as the case may be,  the  Mortgage  or the
Subordinated  Indenture.  All  payments  of  principal  of and any  premium  and
interest on a Global Security will be made to the Depositary or its nominee,  as
the case may be, as the Holder thereof.  The laws of some jurisdictions  require
that certain  purchasers of securities take physical delivery of such securities
in  definitive  form.  These laws may impair the ability to transfer  beneficial
interests in a Global Security.

         Ownership of beneficial  interests in a Global Security will be limited
to  institutions   that  have  accounts  with  the  Depositary  or  its  nominee
(`participants")  and to  persons  that may hold  beneficial  interests  through
participants.  In  connection  with the  issuance  of any Global  Security,  the
Depositary will credit, on its book-entry  registration and transfer system, the
respective principal amounts of Securities represented by the Global Security to
the accounts of its participants.  Ownership of beneficial interests in a Global
Security  will be shown only on, and the transfer of those  ownership  interests
will be effected  only  through,  records  maintained  by the  Depositary  (with
respect to  participants'  interests) or any such  participant  (with respect to
interests  of persons  held by such  participants  on their  behalf).  Payments,
transfers,  exchanges,  and other matters relating to beneficial  interests in a
Global Security may be subject to various policies and procedures adopted by the
Depositary from time to time. None of the Company,  the Mortgage  Trustee or the
Subordinated  Indenture  Trustee,  or any agents of each of the foregoing,  will
have any  responsibility  or liability for any aspect of the Depositary's or any
participant's  records  relating  to,  or  for  payments  made  on  account  of,
beneficial interests in a Global Security, or for maintaining,  supervising,  or
reviewing any records relating to such beneficial interests.


                                     EXPERTS

         The  financial  statements  and schedule  included in the latest Annual
Report on Form 10-K of the Company  have been  audited by Arthur  Andersen  LLP,
independent  public  accountants,  as  indicated  in their  report with  respect
thereto and are  incorporated by reference herein in reliance upon the authority
of said firm as experts in auditing and accounting in giving said report.

                                  LEGAL MATTERS

         The legality of the  Securities  will be passed upon for the Company by
Stephen  W.  Southwick,  Vice  President,  General  Counsel &  Secretary  of the
Company,  200 First  Street S.E.,  Cedar  Rapids,  Iowa 52401,  and by Winthrop,
Stimson, Putnam & Roberts, One Battery Park Plaza, New York, New York 10004, and
for any underwriters, dealers, agents or purchasers by Dorsey & Whitney LLP, 220
South  Sixth  Street,   Minneapolis,   Minnesota  50402.  However,  all  matters
pertaining to the Lien of the Mortgage,  organization of the Company,  titles to
property  and  franchises  will be passed  upon by  Stephen W.  Southwick,  Vice
President, General Counsel & Secretary.


                                       39





                 PART II. INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution.

                  The  estimated  expenses in  connection  with the issuance and
         distribution of the Securities,  other than underwriting  discounts and
         commissions are as follows:

         Registration Fee--Securities and Exchange Commission (actual). $ 15,152
         Printing and Engraving Cost................................... $ 10,000
         Trustee's Charges including Authentication.................... $  7,000
         Attorney's Fees and Expenses.................................. $ 75,000
         Accountant's Fees and Expenses................................ $ 35,000
         Blue Sky Expenses............................................. $  1,000
         Rating Agency Fees............................................ $ 15,000
         Recording and Listing Fees.................................... $ 30,000
         Miscellaneous................................................. $  5,000
                                                                        --------

                           Total....................................... $193,152
                                                                        ========

Item 15. Indemnification.

         Section 490.851 of the Iowa Business  Corporations  Act ("IBCA") grants
each  corporation  organized  thereunder,  such as the Registrant,  the power to
indemnify its directors and officers  against  liabilities  for certain of their
acts.  Section  6.1  of  the  Registrant's  Bylaws,  as  amended,  provides  for
indemnification  of directors and officers of the  Registrant to the full extent
permitted  by Section  490.851 of the IBCA.  Section  6.1 further  requires  the
Registrant to purchase and maintain  insurance on behalf of any person who is or
was a  director,  officer,  employee  or agent of the  Registrant,  or is or was
serving at the request of the  Registrant  as a director,  officer,  employee or
agent  of  another  corporation,  partnership,  joint  venture,  trust  or other
enterprise  against any liability  asserted and incurred  against such person in
any such capacity or arising out of such person's status as such, whether or not
the  Registrant  would have the power to  indemnify  such  person  against  such
liability under the provisions of Section 6.1. Section 2 of Article Ninth of the
Registrant's  Amended  Articles of  Incorporation,  however,  requires  that the
Registrant may, but is not required to, maintain such insurance.

         Section 490.832 of the IBCA grants corporations  organized  thereunder,
such as the Registrant,  the authority to adopt a provision in their  respective
articles of incorporation eliminating or limiting, with certain exceptions,  the
personal  liability of a director to the corporation or to its  shareholders for
monetary damages for certain breaches of fiduciary duty as a director. Section 1
of Article  Ninth of the Amended  Articles of  Incorporation  of the  Registrant
eliminates the personal  liability of each director except for liability (i) for
any  breach  of  the  director's  duty  of  loyalty  to  the  Registrant  or its
shareholders,  (ii) for acts or omissions not in good faith or which involve any
intentional  misconduct or knowing  violation of the law, (iii) any  transaction
from which the  director  derived an improper  personal  benefit,  or (iv) under
Section 490.833 of the IBCA relating to liability for unlawful distribution.

         The  foregoing  statements  are subject to the detailed  provisions  of
Sections 490.832,  490.833 and 490.851 of the IBCA, Article Ninth of the Amended
Articles of  Incorporation  of the Registrant and Section 6.1 of the Bylaws,  as
amended of the  Registrant,  as  applicable  and  should be read in  conjunction
therewith for a more full understanding of their affect on the Registrant.

         The  Registrant's  directors'  and  officers'  insurance  policies  are
designed to reimburse the Registrant for any payments made by it pursuant to the
foregoing indemnification provisions.


                                     II - 1





         The proposed form of underwriting  agreement for each of the Securities
contains  provisions  under  which  the  underwriters  agree  to  indemnify  the
directors and officers of the Registrant  against certain  liabilities under the
Securities Act of 1933, as amended (the "Act").

Item 16. Exhibits.

         See Exhibit Index on Page II - 6.

Item 17. Undertakings.

         The undersigned Registrant hereby undertakes:

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

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

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

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

Provided,  however,  that  paragraphs  (1)(i)  and  (1)(ii)  do not apply if the
Registration Statement is on Form S-3, or Form S-8, and the information required
to be included in a Post-Effective Amendment by those paragraphs is contained in
periodic  reports  filed  with  or  furnished  to the  Securities  and  Exchange
Commission  by the  Registrant  pursuant  to Section 13 or Section  15(d) of the
Securities  Exchange  Act of 1934,  as  amended  (the  "Exchange  Act") that are
incorporated by reference in the Registration Statement.

         (2)      That, for the purpose of determining  liability under the Act,
each such  Post-Effective  Amendment  shall be  deemed to be a new  Registration
Statement  relating to the securities  offered  therein and the offering of such
securities  at that time shall be deemed to be the  initial  bona fide  offering
thereof.

         (3)      To  remove  from  registration  by means  of a  Post-Effective
Amendment any of the  securities  which remain unsold at the  termination of the
offering.

         (4)      That for purposes of determining  any liability under the Act,
each filing of the Registrant's annual report pursuant to Section 13(a) or 15(d)
of the Exchange Act (and, where  applicable,  each filing of an employee benefit
plan's  annual  report  pursuant to Section  15(d) of the Exchange  Act) that is
incorporated by reference in the Registration  Statement shall be deemed to be a
new Registration  Statement  relating to the securities  offered therein and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof.


                                     II - 2





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


                                     II - 3





                                POWER OF ATTORNEY

         Each person whose signature  appears below authorizes Lee Liu, Larry D.
Root,  Thomas M. Walker and John E.  Ebright,  or any one of them, to execute in
the  name  of  each  such  person  who is then an  officer  or  director  of the
Registrant,  and  to  file  any  amendments  to,  this  Registration  Statement,
including  post-effective  amendments,  necessary  or  advisable  to enable  the
Registrant to comply with the Securities Act of 1933, as amended, and any rules,
regulations  and  requirements  of the  Securities and Exchange  Commission,  in
respect  thereof,  which  amendments may make such changes in such  Registration
Statement as the above-named attorneys, or any of them, may deem appropriate.

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant certifies that it has reasonable grounds to believe that it meets
all of the  requirements  for  filing  on  Form  S-3 and has  duly  caused  this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized,  in the City of Cedar Rapids,  State of Iowa, on the 9th day of
June, 1997.

                                       IES UTILITIES INC.



                                 By:   /s/      Larry D. Root
                                       ______________________________
                                       Larry D. Root
                                       President & Chief Operating Officer

         Pursuant to the requirements of the Securities Act of 1933, as amended,
such Registration  Statement has been signed below on the 9th day of June, 1997,
by the following persons in the capacities indicated:


                   Signature                           Title
                   ---------                           -----

  /s/          Lee Liu                     Chairman of the Board &
- ---------------------------------------    Chief Executive Officer and Director
               Lee Liu                     (Principal Executive Officer)


  /s/          Thomas M. Walker            Executive Vice President &
- ---------------------------------------    Chief Financial Officer
               Thomas M. Walker            (Principal Financial Officer)


  /s/          John E. Ebright             Controller & Chief Accounting Officer
- ---------------------------------------    (Principal Accounting Officer)
               John E. Ebright


  /s/          C.R.S. Anderson             Director
- ---------------------------------------
               C.R.S. Anderson


  /s/          J. Wayne Bevis              Director
- ---------------------------------------
               J. Wayne Bevis


                                     II - 4






                   Signature                           Title
                   ---------                           -----

  /s/          Jack R. Newman              Director
- ---------------------------------------
               Jack R. Newman


  /s/          Robert D. Ray               Director
- ---------------------------------------
               Robert D. Ray


  /s/          David Q. Reed               Director
- ---------------------------------------
               David Q. Reed


  /s/          Henry Royer                 Director
- ---------------------------------------
               Henry Royer


  /s/          Robert W. Schlutz           Director
- ---------------------------------------
               Robert W. Schlutz


  /s/          Anthony R. Weiler           Director
- ---------------------------------------
               Anthony R. Weiler


                                     II - 5





                                  EXHIBIT INDEX

Exhibit Number                         List of Exhibits
- --------------                         ----------------

1(a)              Proposed form of Underwriting Agreement relating to Collateral
                  Trust Bonds ("Bonds").

1(b)              Proposed   form  of   Underwriting   Agreement   relating   to
                  Subordinated  Debentures  to be issued under the  Subordinated
                  Indenture.

*4(a)             Indenture of Mortgage and Deed of Trust, dated as of September
                  1, 1993, between the Company (formerly Iowa Electric Light and
                  Power Company  ("IE")) and The First National Bank of Chicago,
                  as Trustee  ("Mortgage")  (Filed as Exhibit  4(c) to IE's Form
                  10-Q for the quarter ended September 30, 1993).

*4(b)             Supplemental Indentures to the Mortgage:

                  Number    Dated as of          File Reference         Exhibit
                  ------    -----------          --------------         -------

                  First     October 1, 1993      Form 10-Q, 11/12/93     4(d)
                  Second    November 1, 1993     Form 10-Q, 11/12/93     4(e)
                  Third     March 1, 1995        Form 10-Q, 5/12/95      4(b)
                  Fourth    September 1, 1996    Form 8-K, 9/19/96       4(c)(i)
                  Fifth     April 1, 1997        Form 10-Q, 5/14/97      4(a)

4(c)              Proposed   form   of   __________    Supplemental    Indenture
                  establishing the series of Bonds (including form of Bonds).

*4(d)             Indenture of Mortgage and Deed of Trust, dated as of August 1,
                  1940, between the Company (formerly IE) and The First National
                  Bank of Chicago,  Trustee (1940  Indenture)  (Filed as Exhibit
                  2(a) to IE's Registration Statement, File No. 2-25347).

*4(e)             Supplemental Indentures to the 1940 Indenture:

                  Number         Dated as of         IE File Reference   Exhibit
                  ------         -----------         -----------------   -------

                  First          March 1, 1941            2-25347         2(a)
                  Second         July 15, 1942            2-25347         2(a)
                  Third          August 2, 1943           2-25347         2(a)
                  Fourth         August 10, 1944          2-25347         2(a)
                  Fifth          November 10, 1944        2-25347         2(a)
                  Sixth          August 8, 1945           2-25347         2(a)
                  Seventh        July 1, 1946             2-25347         2(a)
                  Eighth         July 1, 1947             2-25347         2(a)
                  Ninth          December 15, 1948        2-25347         2(a)
                  Tenth          November 1, 1949         2-25347         2(a)
                  Eleventh       November 10, 1950        2-25347         2(a)
                  Twelfth        October 1, 1951          2-25347         2(a)
                  Thirteenth     March 1, 1952            2-25347         2(a)
                  Fourteenth     November 5, 1952         2-25347         2(a)
                  Fifteenth      February 1, 1953         2-25347         2(a)
                  Sixteenth      May 1, 1953              2-25347         2(a)
                  Seventeenth    November 3, 1953         2-25347         2(a)
                  Eighteenth     November 8, 1954         2-25347         2(a)


                                     II - 6





                  Number          Dated as of        IE File Reference  Exhibit
                  ------          -----------        -----------------  -------

                  Nineteenth      January 1, 1955         2-25347        2(a)
                  Twentieth       November 1, 1955        2-25347        2(a)
                  Twenty-first    November 9, 1956        2-25347        2(a)
                  Twenty-second   November 6, 1957        2-25347        2(a)
                  Twenty-third    November 4, 1959        2-25347        2(a)
                  Twenty-fourth   November 3, 1959        2-25347        2(a)
                  Twenty-fifth    November 1, 1960        2-25347        2(a)
                  Twenty-sixth    January 1, 1961         2-25347        2(a)
                  Twenty-seventh  November  7, 1961       2-25347        2(a)
                  Twenty-eighth   November  6, 1962       2-25347        2(a)
                  Twenty-ninth    November  5, 1963       2-25347        2(a)
                  Thirtieth       November  4, 1964       2-25347        2(a)
                  Thirty-first    November  2, 1965       2-25347        2(a)
                  Thirty-second   September 1, 1966  Form 10-K, 1966     4.10
                  Thirty-third    November  30, 1966 Form 10-K, 1966     4.10
                  Thirty-fourth   November  7, 1967  Form 10-K, 1967     4.10
                  Thirty-fifth    November  5, 1968  Form 10-K, 1968     4.10
                  Thirty-sixth    November  1, 1969  Form 10-K, 1969     4.10
                  Thirty-seventh  December 1, 1970   Form 8-K, 12/70       1
                  Thirty-eighth   November  2, 1971       2-43131        2(g)
                  Thirty-ninth    May 1, 1972        Form 8-K, 5/72        1
                  Fortieth        November  7, 1972       2-56078        2(i)
                  Forty-first     November  7, 1973       2-56078        2(j)
                  Forty-second    September 10, 1974      2-56078        2(k)
                  Forty-third     November  5, 1975       2-56078        2(l)
                  Forty-fourth    July 1, 1976       Form 8-K, 7/76        1
                  Forty-fifth     November  1, 1976  Form 8-K, 12/76       1
                  Forty-sixth     December  1, 1977       2-60040        2(o)
                  Forty-seventh   November  1, 1978  Form 10-Q, 6/30/79    1
                  Forty-eighth    December  1, 1979  Form S-16, 2-65996  2(q)
                  Forty-ninth     November  1, 1981  Form 10-Q, 3/31/82    2
                  Fiftieth        December  1, 1980  Form 10-K, 1981     4(s)
                  Fifty-first     December  1, 1982  Form 10-K, 1982     4(t)
                  Fifty-second    December  1, 1983  Form 10-K, 1983     4(u)
                  Fifty-third     December  1, 1984  Form 10-K, 1984     4(v)
                  Fifty-fourth    March 1, 1985      Form 10-K, 1984     4(w)
                  Fifty-fifth     March 1, 1988      Form 10-Q, 5/12/88  4(b)
                  Fifty-sixth     October 1, 1988    Form 10-Q, 11/10/88 4(c)
                  Fifty-seventh   May 1, 1991        Form 10-Q, 8/13/91  4(d)
                  Fifty-eighth    March 1, 1992      Form 10-K, 1991     4(c)
                  Fifty-ninth     October 1, 1993    Form 10-Q, 11/12/93 4(a)
                  Sixtieth        November  1, 1993  Form 10-Q, 11/12/93 4(b)
                  Sixty-first     March 1, 1995      Form 10-Q, 5/12/95  4(a)
                  Sixty-second    September 1, 1996  Form 8-K, 9/19/96   4(c)(i)
                  Sixty-third     April 1, 1997      Form 10-Q, 5/14/97  4(b)

4(f)              Proposed form of __________  Supplemental  Indenture providing
                  for the  issuance of Class "A" Bonds under the 1940  Indenture
                  (including form of Class "A" Bonds).


                                     ll - 7






*4(g)             Indenture  or Deed of Trust  dated  as of  February  1,  1923,
                  between  the Company  (successor  to Iowa  Southern  Utilities
                  Company  (IS)  as a  result  of  merger  of IS and IE) and The
                  Northern  Trust  Company (The First  National Bank of Chicago,
                  successor)  and  Harold  H.  Rockwell   (Richard  D.  Manella,
                  successor), as Trustees (ISU 1923 Indenture) (Filed as Exhibit
                  B-1 to File No. 2-1719).

*4(h)             Supplemental Indentures to the ISU 1923 Indenture:

                   Dated as of                IS File Reference        Exhibit
                   -----------                -----------------        -------

                   May 1, 1940                      2-4921             B-1-k
                   May 2, 1940                      2-4921             B-1-l
                   October 1, 1945                  2-8053              7(m)
                   October 2, 1945                  2-8053              7(n)
                   January 1, 1948                  2-8053              7(o)
                   September 1, 1950                33-3995             4(e)
                   February 1, 1953                 2-10543             4(b)
                   October 2, 1953                  2-10543             4(q)
                   August 1, 1957                   2-13496             2(b)
                   September 1, 1962                2-20667             2(b)
                   June 1, 1967                     2-26478             2(b)
                   February 1, 1973                 2-46530             2(b)
                   February 1, 1975                 2-53860             2(aa)
                   July 1, 1975                     2-54285             2(bb)
                   September 2, 1975                2-57510             2(bb)
                   March 10, 1976                   2-57510             2(cc)
                   February 1, 1977                 2-60276             2(ee)
                   January 1, 1978                   0-849                2
                   March 1, 1979                     0-849                2
                   March 1, 1980                     0-849                2
                   May 31, 1986                     33-3995             4(g)
                   July 1, 1991                      0-849              4(h)
                   September 1, 1992                 0-849              4(m)
                   December 1, 1994             Form 10-K,1994          4(f)

*4(i)             Indenture (For Unsecured Subordinated Debt Securities),  dated
                  as of  December  1, 1995,  between  the  Company and The First
                  National  Bank of Chicago,  Trustee  (Subordinated  Indenture)
                  (Filed  as  Exhibit   4(i)  to  the   Company's   Registration
                  Statement, File No. 33-62259).

5                 Opinion of  Stephen  W.  Southwick,  Vice  President,  General
                  Counsel  &  Secretary  as to the  legality  of the  Securities
                  (including consent of counsel).

*12               Ratio of Earnings to Fixed Charges (Filed as Exhibit 12 to the
                  Company's Form 10-Q for the quarter ended March 31, 1997).

23(a)             Consent of Arthur Andersen LLP.

23(b)             Consent of  Stephen  W.  Southwick,  Vice  President,  General
                  Counsel & Secretary (contained in Exhibit 5).


                                     II - 8





24                Powers of Attorney  (included on p. II - 4 of the Registration
                  Statement).

25(a)             Form T-1 Statement of  Eligibility  under the Trust  Indenture
                  Act of  1939,  as  amended,  of The  First  National  Bank  of
                  Chicago, as Trustee under the Mortgage.

25(b)             Form T-1 Statement of  Eligibility  under the Trust  Indenture
                  Act of  1939,  as  amended,  of The  First  National  Bank  of
                  Chicago, as Trustee under the Subordinated Indenture.

26                Form  of  Letter  to  Prospective   Purchasers  regarding  the
                  Securities.



- -------------------
* The exhibits  listed above and marked with an asterisk  were filed as exhibits
to registration statements or reports previously filed with the Commission under
the exhibit number and file reference number shown after each such exhibit,  and
they are hereby incorporated herein by reference.



                                     II - 9