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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000107832-07-000058
Filing Date
2007-03-01
Accepted
2007-03-01 17:21:09
Documents
21
Period of Report
2006-12-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-K 12/31/06 form10k123106.htm 10-K 5481729
2 FORM 10-K 12/31/06 EXHIBIT 10.28 form10k123106exh10pt28.htm EX-10 22499
3 FORM 10-K 12/31/06 EXHIBIT 10.29 form10k123106exh10pt29.htm EX-10 48273
4 FORM 10-K 12/31/06 EXHIBIT 12.1 form10k123106exh12pt1.htm EX-12 21766
5 FORM 10-K 12/31/06 EXHIBIT 12.2 form10k123106exh12pt2.htm EX-12 19978
6 FORM 10-K 12/31/06 EXHIBIT 12.3 form10k123106exh12pt3.htm EX-12 20253
7 FORM 10-K 12/31/06 EXHIBIT 21 form10k123106exh21.htm EX-21 6529
8 FORM 10-K 12/31/06 EXHIBIT 23.1 form10k123106exh23pt1.htm EX-23 2523
9 FORM 10-K 12/31/06 EXHIBIT 23.2 form10k123106exh23pt2.htm EX-23 2286
10 FORM 10-K 12/31/06 EXHIBIT 23.3 form10k123106exh23pt3.htm EX-23 2294
11 FORM 10-K 12/31/06 EXHIBIT 31.1 form10k123106exh31pt1.htm EX-31 13923
12 FORM 10-K 12/31/06 EXHIBIT 31.2 form10k123106exh31pt2.htm EX-31 13942
13 FORM 10-K 12/31/06 EXHIBIT 31.3 form10k123106exh31pt3.htm EX-31 12716
14 FORM 10-K 12/31/06 EXHIBIT 31.4 form10k123106exh31pt4.htm EX-31 12246
15 FORM 10-K 12/31/06 EXHIBIT 31.5 form10k123106exh31pt5.htm EX-31 12714
16 FORM 10-K 12/31/06 EXHIBIT 31.6 form10k123106exh31pt6.htm EX-31 12244
17 FORM 10-K 12/31/06 EXHIBIT 32.1 form10k123106exh32pt1.htm EX-32 3052
18 FORM 10-K 12/31/06 EXHIBIT 32.2 form10k123106exh32pt2.htm EX-32 3013
19 FORM 10-K 12/31/06 EXHIBIT 32.3 form10k123106exh32pt3.htm EX-32 3012
21 GRAPHIC img1.jpg GRAPHIC 2654
22 FORM 10-K 12/31/06 form10k123106.pdf 10-K 23821986
  Complete submission text file 0000107832-07-000058.txt   38543674
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.: 07664709
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 N BILTMORE LANE PO BOX 77007 MADISON WI 53707-1007
Business Address 4902 NORTH BILTMORE LANE PO BOX 77007 MADISON WI 53707-1007 608-4583314
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.: 07664708
SIC: 4931 Electric & Other Services Combined

Mailing Address 4902 NORTH BILTMORE LANE PO BOX 77007 MADISON WI 53707-1007
Business Address 4902 NORTH BILTMORE LANE PO BOX 77007 MADISON WI 53707-1007 608-458-3314
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.: 07664707
SIC: 4931 Electric & Other Services Combined