<SEC-DOCUMENT>0000067716-11-000051.txt : 20110527
<SEC-HEADER>0000067716-11-000051.hdr.sgml : 20110527
<ACCEPTANCE-DATETIME>20110527101644
ACCESSION NUMBER:		0000067716-11-000051
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110524
ITEM INFORMATION:		Other Events
FILED AS OF DATE:		20110527
DATE AS OF CHANGE:		20110527

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MDU RESOURCES GROUP INC
		CENTRAL INDEX KEY:			0000067716
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		IRS NUMBER:				410423660
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03480
		FILM NUMBER:		11876429

	BUSINESS ADDRESS:	
		STREET 1:		1200 WEST CENTURY AVENUE
		CITY:			BISMARCK
		STATE:			ND
		ZIP:			58503
		BUSINESS PHONE:		701-530-1059

	MAIL ADDRESS:	
		STREET 1:		1200 WEST CENTURY AVENUE
		CITY:			BISMARCK
		STATE:			ND
		ZIP:			58503

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MONTANA DAKOTA UTILITIES CO
		DATE OF NAME CHANGE:	19850429
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>form8-k.htm
<DESCRIPTION>MDU RESOURCES GROUP, INC. FORM 8-K
<TEXT>
<html>
<head>
    <title>form8-k.htm</title>
    <!-- Licensed to: mduedgar08 -->
    <!-- Document Created using EDGARizer 5.3.1.0 -->
    <!-- Copyright 1995 - 2011 Thomson Reuters. All rights reserved. -->
</head>


<body bgcolor="#ffffff" style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">
<br>
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">UNITED STATES</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">SECURITIES AND EXCHANGE COMMISSION</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">WASHINGTON, DC 20549</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">______________</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 18.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 14pt; FONT-WEIGHT: bold">FORM 8-K</font></div>

<div style="LINE-HEIGHT: 18.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 18.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">CURRENT REPORT</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">PURSUANT TO SECTION 13 OR 15(d) OF THE</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">SECURITIES EXCHANGE ACT OF 1934</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Date of Report (Date of earliest event reported):<font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;&#160;May 24, 2011</font></font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div>
<table cellpadding="0" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td colspan="5" valign="bottom" width="78%">
<div style="LINE-HEIGHT: 18.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 14pt; FONT-WEIGHT: bold">MDU Resources Group, Inc.</font></div>
</td>
</tr><tr>
<td colspan="5" valign="top" width="78%">
<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(Exact name of registrant as specified in its charter)</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>
</td>
</tr><tr>
<td valign="bottom" width="22%">
<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Delaware</font></div>
</td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="27%">
<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">1-3480</font></div>
</td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="25%">
<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">41-0423660</font></div>
</td>
</tr><tr>
<td valign="bottom" width="22%">
<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(State or other jurisdiction of</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">incorporation)</font></div>
</td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="27%">
<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(Commission</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">File Number)</font></div>
</td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="25%">
<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(I.R.S. Employer</font></div>

<div style="LINE-HEIGHT: 10.25pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Identification No.)</font></div>
</td>
</tr><tr>
<td valign="bottom" width="22%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="27%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160;&#160;&#160;</font></div>
</td>
<td valign="bottom" width="2%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="bottom" width="25%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">&#160; </font></td>
</tr><tr>
<td colspan="5" valign="bottom" width="78%">
<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">1200 West Century Avenue</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">P.O. Box 5650</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Bismarck, North Dakota&#160;&#160;58506-5650</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(Address of principal executive offices)</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">(Zip Code)</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: -6.2pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Registrant&#8217;s telephone number, including area code: <font style="DISPLAY: inline; FONT-WEIGHT: bold">(701) 530-1000</font></font></div>
</td>
</tr></table>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">______________</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</font></div>

<div style="LINE-HEIGHT: 11.4pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div>
<table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr valign="top" style="LINE-HEIGHT: 11.4pt;">
<td style="WIDTH: 18pt">
<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">[ ]</font></div>
</td>
<td>
<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></div>
</td>
</tr></table>
</div>

<div>
<table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr valign="top" style="LINE-HEIGHT: 11.4pt;">
<td style="WIDTH: 18pt">
<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">[ ]</font></div>
</td>
<td>
<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></div>
</td>
</tr></table>
</div>

<div>
<table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr valign="top" style="LINE-HEIGHT: 11.4pt;">
<td style="WIDTH: 18pt">
<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">[ ]</font></div>
</td>
<td>
<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></div>
</td>
</tr></table>
</div>

<div>
<table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr valign="top" style="LINE-HEIGHT: 11.4pt;">
<td style="WIDTH: 18pt">
<div style="TEXT-INDENT: 0pt; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">[ ]</font></div>
</td>
<td>
<div align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></div>
</td>
</tr></table>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<br>
<div id="PGBRK" style="TEXT-INDENT: 0pt; WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<div id="FTR">
<div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>
</div>

<div id="PN" style="PAGE-BREAK-AFTER: always; WIDTH: 100%">
<div style="TEXT-ALIGN: center; WIDTH: 100%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>

<div style="TEXT-ALIGN: center; WIDTH: 100%">
<hr style="COLOR: dimgray" noshade size="2">
</div>
</div>

<div id="HDR">
<div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>
</div>
</div>

<br>
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">Item 8.01&#160;&#160;&#160;&#160;&#160;&#160;Other Events.</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">This report is being filed in accordance with section&#160;1503 of the "Dodd-Frank Wall Street Reform and Consumer Protection Act." On May&#160;24, 2011, Connolly-Pacific&#160;Co., an indirect subsidiary of MDU&#160;Resources&#160;Group,&#160;Inc., received an imminent danger order issued by the Mine Safety and Health Administration under section&#160;107(a) of the Federal Mine Safety and Health Act of 1977 at the Pebbly Beach Quarry on Catalina&#160;Island, California. The order was issued upon the observation of rock loading near a high wall that was deemed unsafe. A berm has been erected and signage placed to prevent access to the area while the company considers further action to address the matter.</font></div>

<br>
<div id="PGBRK" style="TEXT-INDENT: 0pt; WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<div id="FTR">
<div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>
</div>

<div id="PN" style="PAGE-BREAK-AFTER: always; WIDTH: 100%">
<div style="TEXT-ALIGN: center; WIDTH: 100%"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>

<div style="TEXT-ALIGN: center; WIDTH: 100%">
<hr style="COLOR: dimgray" noshade size="2">
</div>
</div>

<div id="HDR">
<div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt">&#160; </font></div>
</div>
</div>

<br>
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">SIGNATURE</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">Date:&#160;&#160;May 27, 2011</font></div>

<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
</div>

<div align="left">
<table cellpadding="0" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
<tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" colspan="3" valign="top" width="5%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">MDU Resources Group, Inc.</font></div>
</td>
</tr><tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="2" valign="top" width="5%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="3%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
</tr><tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td colspan="2" valign="top" width="5%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="3%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
</tr><tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" valign="top" width="5%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">By:</font></div>
</td>
<td align="left" colspan="2" valign="top" width="49%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt"><font style="DISPLAY: inline; TEXT-DECORATION: underline">&#160;&#160;&#160;/s/ Paul K. Sandness</font>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div>
</td>
</tr><tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="5%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" colspan="2" valign="top" width="49%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">Paul K. Sandness</font></div>
</td>
</tr><tr>
<td valign="top" width="46%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td valign="top" width="5%"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">&#160; </font></td>
<td align="left" colspan="2" valign="top" width="49%">
<div style="LINE-HEIGHT: 13.7pt; TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: times new roman; FONT-SIZE: 10pt">General Counsel and Secretary</font></div>
</td>
</tr></table>
</div>

<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block">&#160;</div>

<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block"><br>
&#160;</div>

<div style="LINE-HEIGHT: 12.55pt; TEXT-INDENT: 0pt; DISPLAY: block">
<hr style="COLOR: dimgray" noshade size="2">
&#160;<br>
</div>

<br>
<br>
</body>
</html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
