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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000107832-09-000001
Filing Date
2009-02-27
Accepted
2009-02-27 15:28:07
Documents
25
Period of Report
2008-12-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-K 12/31/08 form10k123108.htm 10-K 5602811
2 FORM 10-K 12/31/08 EXHIBIT 4.19 form10k123108exh4pt19.htm EX-4 23033
3 FORM 10-K 12/31/08 EXHIBIT 10.4C form10k123108exh10pt4c.htm EX-10 62335
4 GRAPHIC img1.gif GRAPHIC 81
5 FORM 10-K 12/31/08 EXHIBIT 10.4D form10k123108exh10pt4d.htm EX-10 49315
6 FORM 10-K 12/31/08 EXHIBIT 12.1 form10k123108exh12pt1.htm EX-12 18336
7 FORM 10-K 12/31/08 EXHIBIT 12.2 form10k123108exh12pt2.htm EX-12 16026
8 FORM 10-K 12/31/08 EXHIBIT 12.3 form10k123108exh12pt3.htm EX-12 16959
9 FORM 10-K 12/31/08 EXHIBIT 21.1 form10k123108exh21pt1.htm EX-21 3789
10 FORM 10-K 12/31/08 EXHIBIT 21.2 form10k123108exh21pt2.htm EX-21 2519
11 FORM 10-K 12/31/08 EXHIBIT 23.1 form10k123108exh23pt1.htm EX-23 2423
12 FORM 10-K 12/31/08 EXHIBIT 23.2 form10k123108exh23pt2.htm EX-23 2208
13 FORM 10-K 12/31/08 EXHIBIT 23.3 form10k123108exh23pt3.htm EX-23 2208
14 FORM 10-K 12/31/08 EXHIBIT 31.1 form10k123108exh31pt1.htm EX-31 14134
15 FORM 10-K 12/31/08 EXHIBIT 31.2 form10k123108exh31pt2.htm EX-31 14154
16 FORM 10-K 12/31/08 EXHIBIT 31.3 form10k123108exh31pt3.htm EX-31 14137
17 FORM 10-K 12/31/08 EXHIBIT 31.4 form10k123108exh31pt4.htm EX-31 14178
18 FORM 10-K 12/31/08 EXHIBIT 31.5 form10k123108exh31pt5.htm EX-31 14135
19 FORM 10-K 12/31/08 EXHIBIT 31.6 form10k123108exh31pt6.htm EX-31 14176
20 FORM 10-K 12/31/08 EXHIBIT 32.1 form10k123108exh32pt1.htm EX-32 2872
21 FORM 10-K 12/31/08 EXHIBIT 32.2 form10k123108exh32pt2.htm EX-32 2869
22 FORM 10-K 12/31/08 EXHIBIT 32.3 form10k123108exh32pt3.htm EX-32 2868
24 GRAPHIC img1.jpg GRAPHIC 2654
25 FORM 10-K 12/31/08 PDF form10k123108.pdf 10-K 1266980
26 filename26.htm COVER 10423
  Complete submission text file 0000107832-09-000001.txt   7658773
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: 10-K | Act: 34 | File No.: 001-04117 | Film No.: 09642511
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 N BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
WISCONSIN POWER & LIGHT CO (Filer) CIK: 0000107832 (see all company filings)

IRS No.: 390714890 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-00337 | Film No.: 09642510
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
ALLIANT ENERGY CORP (Filer) CIK: 0000352541 (see all company filings)

IRS No.: 391380265 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-09894 | Film No.: 09642512
SIC: 4931 Electric & Other Services Combined