<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>11001 - Disclosure - Asset Retirement Obligations</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><CurrencyCode /><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName /><CurrencySymbol /><contextRef><ContextID>Duration_1_1_2013_To_6_30_2013</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001490630</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2013-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-06-30T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Key="CalendarSupplement" Id="0" Label="6 Months Ended" /><Label Key="Calendar" Id="1" Label="Jun. 30, 2013" /></Labels></Column></Columns><Rows><Row FlagID="0"><Id>1</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>1</Level><ElementName>us-gaap_AssetRetirementObligationDisclosureAbstract</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Asset Retirement Obligations [Abstract]</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>us-gaap_AssetRetirementObligationDisclosureTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>terseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="Duration_1_1_2013_To_6_30_2013" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div&gt; &lt;div style="margin-left:0pt;margin-right:0pt;"&gt;
		&lt;p style="margin:0pt 0pt 12pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
			&lt;font style="display: inline;font-weight:bold;"&gt;10. ASSET RETIREMENT OBLIGATIONS&amp;nbsp;&lt;/font&gt;
		&lt;/p&gt;
		&lt;p style="margin:0pt 0pt 12pt;text-indent:36pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
			&lt;font style="display: inline;"&gt;The changes in asset retirement obligations for the six months ended June 30, 2013 and the year ended December 31, 2012 are as follows: &lt;/font&gt;
		&lt;/p&gt;
		&lt;div style="width:100%"&gt;&lt;table cellpadding="0" cellspacing="0" align="center" style="border-collapse:collapse;width: 100.00%;margin-left:0pt;"&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;height:1pt;overflow:hidden;font-size: 1pt"&gt;
						&lt;font style="display: inline;font-size:1pt;"&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;height:1pt;overflow:hidden;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;height:1pt;overflow:hidden;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;height:1pt;overflow:hidden;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:1pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;height:1pt;overflow:hidden;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:24pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:24pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:24pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:center;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Six months ended June 30, 2013&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:24pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:center;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:24pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:center;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Year ended December 31, 2012&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td colspan="3" valign="bottom" style="width:00.02%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:center;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;(in thousands)&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Balance at beginning of period (including current portion) &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;$&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;33,003&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;$&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;34,113&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Accretion expense &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;1,178&amp;nbsp;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;1,896&amp;nbsp;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Adjustment resulting from addition of property &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt; &amp;nbsp;-&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;72&amp;nbsp;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Adjustment resulting from disposal of property &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt; &amp;nbsp;-&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;(968)
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Adjustments to the liability from annual recosting and other &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt; &amp;nbsp;-&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;(201)
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Liabilities settled &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;(468)
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;(1,909)
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Balance at end of period &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;33,713&amp;nbsp;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;33,003&amp;nbsp;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Current portion of asset retirement obligation &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;1,818&amp;nbsp;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt solid #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;font-family:Times New Roman;font-size:9pt;text-align:right;" nowrap="nowrap"&gt;&lt;div style="float:left"&gt;&lt;/div&gt;2,255&amp;nbsp;
				&lt;/td&gt;
			&lt;/tr&gt;
			&lt;tr&gt;
				&lt;td valign="bottom" style="width:49.36%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;Long-term portion of asset retirement obligation &lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.34%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:2pt double #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;$&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;31,895&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:03.08%;border-top:1pt none #D9D9D9 ;border-left:1pt none #D9D9D9 ;border-bottom:1pt none #D9D9D9 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 12pt"&gt;
						&amp;nbsp;&lt;/p&gt;
				&lt;/td&gt;
				&lt;td valign="bottom" style="width:22.14%;border-top:1pt solid #000000 ;border-left:1pt none #D9D9D9 ;border-bottom:2pt double #000000 ;border-right:1pt none #D9D9D9 ;background-color: #auto;height:12pt;padding:0pt;"&gt;
					&lt;p style="margin:0pt 0pt 0.05pt;text-align:right;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 9pt"&gt;
						&lt;font style="display: inline;font-size:9pt;"&gt;$&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;30,748&amp;nbsp;&lt;/font&gt;&lt;/p&gt;
				&lt;/td&gt;
			&lt;/tr&gt;
		&lt;/table&gt;&lt;/div&gt;
		&lt;p style="margin:0pt;line-height:normal;text-align:justify;text-justify:inter-ideograph;font-family:Times New Roman;font-size: 1pt"&gt;
			&lt;font style="display: inline;font-size:1pt;"&gt;&amp;nbsp;&lt;/font&gt;
		&lt;/p&gt;
		&lt;p&gt;&lt;font size="1"&gt; &lt;/font&gt;&lt;/p&gt;
	&lt;/div&gt; &lt;/div&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 410

 -SubTopic 20

 -Section 50

 -Paragraph 1

 -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7535-110849



Reference 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 410

 -SubTopic 20

 -Section 50

 -Paragraph 2

 -URI http://asc.fasb.org/extlink&amp;oid=6392692&amp;loc=d3e7569-110849



Reference 3: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Statement of Financial Accounting Standard (FAS)

 -Number 143

 -Paragraph 22

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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