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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000067716-13-000021
Filing Date
2013-02-28
Accepted
2013-02-28 16:42:15
Documents
19
Period of Report
2012-12-31

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES GROUP, INC. 2012 FORM 10-K mduform10-k.htm 10-K 3960344
2 DIRECTOR COMPENSATION POLICY 2/14/13 exhibit10b.htm EX-10.B 37540
3 MDUR SECTION 16 OFFICERS & DIRECTORS W/ INDEMNIFICATION AGREEMENTS CHART 1/4/13 exhibit10n.htm EX-10.N 31740
4 INSTRUMENT OF AMENDMENT TO MDUR 401(K) RETIREMENT PLAN 12/19/12 exhibit10z.htm EX-10.Z 22998
5 COMPUTATION OF RATIO OF EARNINGS exhibit12.htm EX-12 67934
6 SUBSIDIARIES OF MDU RESOURCES GROUP, INC. exhibit21.htm EX-21 47347
7 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM exhibit23a.htm EX-23.A 3469
8 CONSENT OF RYDER SCOTT COMPANY, L.P. exhibit23b.htm EX-23.B 11195
9 CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 exhibit31a.htm EX-31.A 11052
10 CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 exhibit31b.htm EX-31.B 11035
11 CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 exhibit32.htm EX-32 7452
12 MINE SAFETY DISCLOSURES exhibit95.htm EX-95 201282
13 RYDER SCOTT COMPANY, L.P. REPORT DATED 1/30/13 exhibit99.htm EX-99 155619
  Complete submission text file 0000067716-13-000021.txt   29610617

Data Files

Seq Description Document Type Size
14 XBRL INSTANCE DOCUMENT mdu-20121231.xml EX-101.INS 5637510
15 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20121231.xsd EX-101.SCH 135532
16 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20121231_cal.xml EX-101.CAL 141668
17 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20121231_lab.xml EX-101.LAB 1775438
18 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20121231_pre.xml EX-101.PRE 1113257
19 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20121231_def.xml EX-101.DEF 938641
Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1059
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

IRS No.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-03480 | Film No.: 13652805
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)