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                                                          Alliant Energy
                                                          Worldwide Headquarters
                                                          222 W. Washington Ave.
                                                          P.O. Box 192
                                                          Madison, WI 53701-0192
                                                          www.alliant-energy.com
News Release
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                                Media Contact:    David Giroux at (608) 252-3924
                                Finance Contact:  Bob Rusch at (608) 252-3470

ALLIANT ENERGY ANNOUNCES FIRST QUARTER NON-CASH ACCOUNTING CHARGE

          MADISON,  Wis.--Apr.  7, 2000--Alliant  Energy Corporation  (NYSE:LNT)
today announced it will incur a non-cash  charge to net income of  approximately
$25 million, or 31 cents per share, in the first quarter of 2000 to recognize an
increase in the company's  obligation  relating to certain 30-year  exchangeable
senior notes it issued in February. The non-cash charge will not impact earnings
from operations nor the company's ability to pay dividends and is required under
generally  accepted  accounting  principles that presently govern the accounting
for the senior notes.

          The  senior  notes are  exchangeable  for cash based upon the value of
McLeodUSA  (McLeod)  Class A common  stock  (Nasdaq:MCLD).  Due to the  exchange
feature of the senior  notes,  any  increase in the value of McLeod  stock above
$77.23  per share  results  in a  corresponding  increase  in  Alliant  Energy's
obligation under the senior notes.  Current  accounting  principles do not allow
the increases in market value of the company's  McLeod  holdings to be reflected
in earnings,  but require a charge against earnings to reflect the corresponding
increase in Alliant Energy's obligation under the senior notes.

          Alliant  Energy's  holdings  of McLeod  will be reported at a value of
$1.6 billion at March 31, 2000,  compared to a cost of $28 million,  based on 19
million shares held and a market closing price of $84.81. The non-cash charge of
approximately  $25  million is more than  offset by the  unrealized  increase in
value of Alliant Energy's investment in McLeod stock.

          The $402.5  million of  exchangeable  senior notes were issued with an
interest  rate of 7.25%  through  February  15,  2003 and 2.5%  thereafter.  The
company will report the senior notes at a value of approximately $442 million at
March 31, 2000.  The amount  payable upon maturity of the notes is generally the
higher  of: a) the  original  principal  amount,  as  adjusted  for any  accrued
interest  or  distributions  on the common  stock of McLeod;  or b) the  current
market  value of the shares of McLeod  stock  attributable  to the  exchangeable
senior notes.

          The  company  is  required  to adopt  SFAS  No.  133,  Accounting  for
Derivative  Instruments and Hedging  Activities,  no later than January 1, 2001,
and is exploring various early adoption alternatives.  Upon adoption of this new
accounting principle,  Alliant Energy will have a one-time option to designate a
portion of its McLeod holdings as "trading"  securities.  This  designation will
allow the company to realize a significant  one-time increase in income relating
to the unrealized appreciation in value of such shares. The company expects that
this income





Alliant Energy-- First Quarter Earnings Charge
April 7, 2000
Page 2 of 2



will more than offset any charges it incurs  prior to, and in  connection  with,
the adoption of SFAS No. 133  relating to changes in value of the senior  notes.
Further,  the accounting under SFAS No. 133 will allow the company to reflect in
earnings  all  future  changes  in the  value  of the  shares  of  McLeod  stock
designated as trading,  which will  substantially  offset the earnings impact of
corresponding changes in the value of the senior notes.

          Alliant  Energy  Corp.  is a  growing  energy-services  provider  with
operations both  domestically  and  internationally.  Headquartered  in Madison,
Wis., Alliant Energy provides electric, natural gas, water and steam services to
more than two million customers worldwide.  Alliant Energy Resources, Inc., home
of  the  company's  non-utility  businesses,   has  operations  and  investments
throughout the United States as well as in Australia,  Brazil, China, Mexico and
New Zealand.

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This press release includes  forward-looking  statements.  These forward-looking
statements  can be  identified  as such  because  the  context of the  statement
includes  phrases  such as "the  company  expects"  or other words or phrases of
similar import.  Similarly,  statements that describe future plans or strategies
are also  forward-looking  statements.  Such  statements  are subject to certain
risks and  uncertainties  which could cause actual results to differ  materially
from those  currently  anticipated.  Factors which could affect  actual  results
include,  but are not limited to,  changes in the market value of the  company's
holdings in McLeodUSA,  unanticipated  delays in or issues arising in connection
with the company's adoption of SFAS No. 133 and the impact of any future changes
in accounting  principles and practices on the company's  financial condition or
results of  operations.  These factors  should be  considered in evaluating  the
forward-looking  statements,  and undue  reliance  should  not be placed on such
statements.  The  forward-looking  statements included herein are made as of the
date hereof and Alliant  Energy  Corporation  undertakes no obligation to update
publicly such statements to reflect subsequent events or circumstances.