-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, OAKzi2LEtjHqjI7Mlsg6DRUyqE2Kosh+JhnwCMZ6VRxqnQdA7X42thV4r8LhyqP7 4LfgWM+F9jrW4o0yYVuaig== 0001193125-10-194886.txt : 20100823 0001193125-10-194886.hdr.sgml : 20100823 20100823150348 ACCESSION NUMBER: 0001193125-10-194886 CONFORMED SUBMISSION TYPE: FWP PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20100823 DATE AS OF CHANGE: 20100823 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: INTERSTATE POWER & LIGHT CO CENTRAL INDEX KEY: 0000052485 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC & OTHER SERVICES COMBINED [4931] IRS NUMBER: 420331370 STATE OF INCORPORATION: IA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: FWP SEC ACT: 1934 Act SEC FILE NUMBER: 333-159478 FILM NUMBER: 101032330 BUSINESS ADDRESS: STREET 1: 200 FIRST ST SE STREET 2: ALLIANT ENERGY TOWER CITY: CEDAR RAPIDS STATE: IA ZIP: 52401 BUSINESS PHONE: 3193984411 MAIL ADDRESS: STREET 1: 200 FIRST ST SE STREET 2: ALLIANT ENERGY TOWER CITY: CEDAR RAPIDS STATE: IA ZIP: 52401 FORMER COMPANY: FORMER CONFORMED NAME: IES UTILITIES INC DATE OF NAME CHANGE: 20020103 FORMER COMPANY: FORMER CONFORMED NAME: IES UTILITIES INC DATE OF NAME CHANGE: 19940107 FORMER COMPANY: FORMER CONFORMED NAME: IOWA ELECTRIC LIGHT & POWER CO DATE OF NAME CHANGE: 19920703 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: INTERSTATE POWER & LIGHT CO CENTRAL INDEX KEY: 0000052485 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC & OTHER SERVICES COMBINED [4931] IRS NUMBER: 420331370 STATE OF INCORPORATION: IA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: FWP BUSINESS ADDRESS: STREET 1: 200 FIRST ST SE STREET 2: ALLIANT ENERGY TOWER CITY: CEDAR RAPIDS STATE: IA ZIP: 52401 BUSINESS PHONE: 3193984411 MAIL ADDRESS: STREET 1: 200 FIRST ST SE STREET 2: ALLIANT ENERGY TOWER CITY: CEDAR RAPIDS STATE: IA ZIP: 52401 FORMER COMPANY: FORMER CONFORMED NAME: IES UTILITIES INC DATE OF NAME CHANGE: 20020103 FORMER COMPANY: FORMER CONFORMED NAME: IES UTILITIES INC DATE OF NAME CHANGE: 19940107 FORMER COMPANY: FORMER CONFORMED NAME: IOWA ELECTRIC LIGHT & POWER CO DATE OF NAME CHANGE: 19920703 FWP 1 dfwp.htm FREE WRITING PROSPECTUS Free Writing Prospectus

Filed Pursuant to Rule 433

Dated August 23, 2010

Registration Statement No. 333-159478

INTERSTATE POWER AND LIGHT COMPANY

Final Term Sheet

Dated August 23, 2010

 

Issuer:    Interstate Power and Light Company
Size:    $200,000,000
Security Type:    Senior Debentures
Maturity Date:    September 1, 2020
Interest Payment Dates:    March 1 and September 1, commencing March 1, 2011
Coupon:    3.650%
Price to Public:    99.925%
Yield to Maturity:    3.659%
Benchmark Treasury:    2.625% due August 15, 2020
Benchmark Treasury Yield:    2.609%
Spread to Benchmark Treasury:    + 105 bps
Make-Whole Call:    Prior to June 1, 2020 at T + 20 bps
Par Call:    On or after June 1, 2020
Trade Date:    August 23, 2010
Settlement Date:    August 26, 2010 (T+3)
CUSIP:    461070 AJ3
ISIN:    US461070AJ32
Underwriters:   

Joint Book-Running Managers

Banc of America Securities LLC

Wells Fargo Securities, LLC

 

Co-Managers

Mitsubishi UFJ Securities (USA), Inc.

Commerz Markets LLC

Mizuho Securities USA Inc.

The issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents that the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, you may request a copy of these documents from Banc of America Securities LLC by calling 1-800-294-1322 or from Wells Fargo Securities, LLC by calling 1-800-326-5897.

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