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Filing Detail
Form 424B5 - Prospectus [Rule 424(b)(5)]:
SEC Accession No. 0001193125-10-194605
Filing Date
2010-08-23
Accepted
2010-08-23 09:14:37
Documents
1

Document Format Files

Seq Description Document Type Size
1 PRELIMINARY PROSPECTUS SUPPLEMENT d424b5.htm 424B5 335131
  Complete submission text file 0001193125-10-194605.txt   336854
Mailing Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401
Business Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401 3193984411
INTERSTATE POWER & LIGHT CO (Filer) CIK: 0000052485 (see all company filings)

IRS No.: 420331370 | State of Incorp.: IA | Fiscal Year End: 1231
Type: 424B5 | Act: 33 | File No.: 333-159478 | Film No.: 101031448
SIC: 4931 Electric & Other Services Combined