# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-11-000099
Filing Date
2011-11-04
Accepted
2011-11-04 09:25:48
Documents
13
Period of Report
2011-09-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES GROUP, INC. 3RD QUARTER 2011 FORM 10-Q | mduform10-q.htm | 10-Q | 2341227
2 | MDUR 401(K) REITREMENT PLAN, AS RESTATED 3/1/11 | exhibit10a.htm | EX-10.A | 1062851
3 | INSTRUMENT OF AMENDMENT TO THE MDUR 401(K) RETIREMENT PLAN, 9/9/11 | exhibit10b.htm | EX-10.B | 47379
4 | COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND COMBINED FIXED CHARGES AND | exhibit12.htm | EX-12 | 46315
5 | CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 | exhibit31a.htm | EX-31.A | 12292
6 | CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 | exhibit31b.htm | EX-31.B | 13563
7 | CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 | exhibit32.htm | EX-32 | 7799
| Complete submission text file | 0000067716-11-000099.txt |  | 11875979

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
8 | INSTANCE DOCUMENT | mdu-20110930.xml | EX-101.INS | 1859951
9 | SCHEMA DOCUMENT | mdu-20110930.xsd | EX-101.SCH | 63574
10 | CALCULATION LINKBASE DOCUMENT | mdu-20110930_cal.xml | EX-101.CAL | 93522
11 | LABEL LINKBASE DOCUMENT | mdu-20110930_lab.xml | EX-101.LAB | 717305
12 | PRESENTATION LINKBASE DOCUMENT | mdu-20110930_pre.xml | EX-101.PRE | 335942
13 | DEFINITION LINKBASE DOCUMENT | mdu-20110930_def.xml | EX-101.DEF | 560192

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)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-03480 | Film No.: 111179530
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)