Form 10-K/A - Annual report [Section 13 and 15(d), not S-K Item 405]: [Amend]
SEC Accession No. 0000898080-07-000053
Filing Date
2007-03-01
Accepted
2007-03-01 12:04:08
Documents
4
Period of Report
2006-12-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-K/A form10ka.txt 10-K/A 7606
2 CERTIFICATION ex31-a.txt EX-31.A 4669
3 CERTIFICATION ex31-b.txt EX-31.B 4735
4 SECTION 1350 CERTIFICATION ex32.txt EX-32 2043
  Complete submission text file 0000898080-07-000053.txt   20590
Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58506-5650
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58506-5650 701-530-1013
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K/A | Act: 34 | File No.: 001-03480 | Film No.: 07661473
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)