<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.allete.com/20141231" xmlns:ale="http://www.allete.com/20141231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/us-gaap/2014-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2014-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2014/elts/us-roles-2014-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2014-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2014/elts/us-types-2014-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2013-01-31" schemaLocation="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2014-01-31" schemaLocation="http://xbrl.sec.gov/currency/2014/currency-2014-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2014-01-31" schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2014-01-31" schemaLocation="http://xbrl.sec.gov/exch/2014/exch-2014-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2011-01-31" schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ale-20141231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ale-20141231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ale-20141231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ale-20141231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="Acquisitions" roleURI="http://www.allete.com/role/Acquisitions">
        <link:definition>2107100 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAceAgreementDetails" roleURI="http://www.allete.com/role/AcquisitionsAceAgreementDetails">
        <link:definition>2407405 - Disclosure - Acquisitions - ACE Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAceWindAcquisitionDetails" roleURI="http://www.allete.com/role/AcquisitionsAceWindAcquisitionDetails">
        <link:definition>2407402 - Disclosure - Acquisitions - ACE Wind Acquisition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsAcquisitionsTables" roleURI="http://www.allete.com/role/AcquisitionsAcquisitionsTables">
        <link:definition>2307301 - Disclosure - Acquisitions Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsStormLakeIDetails" roleURI="http://www.allete.com/role/AcquisitionsStormLakeIDetails">
        <link:definition>2407404 - Disclosure - Acquisitions - Storm Lake I (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsWindDevelopmentProjectDetails" roleURI="http://www.allete.com/role/AcquisitionsWindDevelopmentProjectDetails">
        <link:definition>2407403 - Disclosure - Acquisitions - Wind Development Project (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegments" roleURI="http://www.allete.com/role/BusinessSegments">
        <link:definition>2102100 - Disclosure - Business Segments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegmentsDetails" roleURI="http://www.allete.com/role/BusinessSegmentsDetails">
        <link:definition>2402402 - Disclosure - Business Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessSegmentsTables" roleURI="http://www.allete.com/role/BusinessSegmentsTables">
        <link:definition>2302301 - Disclosure - Business Segments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingencies" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingencies">
        <link:definition>2112100 - Disclosure - Commitments, Guarantees and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesCoalRailAndShippingContractsDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesCoalRailAndShippingContractsDetails">
        <link:definition>2412404 - Disclosure - Commitments, Guarantees and Contingencies - Coal Rail and Shipping Contracts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesEnvironmentalMattersDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesEnvironmentalMattersDetails">
        <link:definition>2412407 - Disclosure - Commitments, Guarantees and Contingencies - Environmental Matters (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesHydroOperationsDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesHydroOperationsDetails">
        <link:definition>2412403 - Disclosure - Commitments, Guarantees and Contingencies - Hydro Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesLeasingAgreementsDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesLeasingAgreementsDetails">
        <link:definition>2412405 - Disclosure - Commitments, Guarantees and Contingencies - Leasing Agreements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesNorthDakotaWindDevelopmentDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesNorthDakotaWindDevelopmentDetails">
        <link:definition>2412402 - Disclosure - Commitments, Guarantees and Contingencies - North Dakota Wind Development (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesOtherMattersDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesOtherMattersDetails">
        <link:definition>2412408 - Disclosure - Commitments, Guarantees and Contingencies - Other Matters (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesPowerPurchaseAgreementsDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesPowerPurchaseAgreementsDetails">
        <link:definition>2412401 - Disclosure - Commitments, Guarantees and Contingencies - Power Purchase Agreements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsGuaranteesAndContingenciesTransmissionDetails" roleURI="http://www.allete.com/role/CommitmentsGuaranteesAndContingenciesTransmissionDetails">
        <link:definition>2412406 - Disclosure - Commitments, Guarantees and Contingencies - Transmission (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockAndEarningsPerShare" roleURI="http://www.allete.com/role/CommonStockAndEarningsPerShare">
        <link:definition>2113100 - Disclosure - Common Stock and Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockAndEarningsPerShareForwardContractsDetails" roleURI="http://www.allete.com/role/CommonStockAndEarningsPerShareForwardContractsDetails">
        <link:definition>2413403 - Disclosure - Common Stock and Earnings Per Share - Forward Contracts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockAndEarningsPerShareReconciliationOfBasicAndDilutedEarningsPerShareDetails" roleURI="http://www.allete.com/role/CommonStockAndEarningsPerShareReconciliationOfBasicAndDilutedEarningsPerShareDetails">
        <link:definition>2413404 - Disclosure - Common Stock and Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockAndEarningsPerShareSummaryOfCommonStockDetails" roleURI="http://www.allete.com/role/CommonStockAndEarningsPerShareSummaryOfCommonStockDetails">
        <link:definition>2413402 - Disclosure - Common Stock and Earnings Per Share - Summary of Common Stock (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommonStockAndEarningsPerShareTables" roleURI="http://www.allete.com/role/CommonStockAndEarningsPerShareTables">
        <link:definition>2313301 - Disclosure - Common Stock and Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsilidatedStatementOfIncome" roleURI="http://www.allete.com/role/ConsilidatedStatementOfIncome">
        <link:definition>1002000 - Statement - Consilidated Statement of Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheet" roleURI="http://www.allete.com/role/ConsolidatedBalanceSheet">
        <link:definition>1001000 - Statement - Consolidated Balance Sheet</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetParentheticals" roleURI="http://www.allete.com/role/ConsolidatedBalanceSheetParentheticals">
        <link:definition>1001501 - Statement - Consolidated Balance Sheet Parentheticals</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementOfCashFlows" roleURI="http://www.allete.com/role/ConsolidatedStatementOfCashFlows">
        <link:definition>1004000 - Statement - Consolidated Statement of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementOfComprehensiveIncome" roleURI="http://www.allete.com/role/ConsolidatedStatementOfComprehensiveIncome">
        <link:definition>1003000 - Statement - Consolidated Statement of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementOfComprehensiveIncomeParentheticals" roleURI="http://www.allete.com/role/ConsolidatedStatementOfComprehensiveIncomeParentheticals">
        <link:definition>1003501 - Statement - Consolidated Statement of Comprehensive Income Parentheticals</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementOfShareholdersEquity" roleURI="http://www.allete.com/role/ConsolidatedStatementOfShareholdersEquity">
        <link:definition>1005000 - Statement - Consolidated Statement of Shareholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Derivatives" roleURI="http://www.allete.com/role/Derivatives">
        <link:definition>2109100 - Disclosure - Derivatives</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesDetails" roleURI="http://www.allete.com/role/DerivativesDetails">
        <link:definition>2409402 - Disclosure - Derivatives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesHedgedItemsDetails" roleURI="http://www.allete.com/role/DerivativesHedgedItemsDetails">
        <link:definition>2409401 - Disclosure - Derivatives - Hedged Items (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DocumentAndEntityInformationDocument" roleURI="http://www.allete.com/role/DocumentAndEntityInformationDocument">
        <link:definition>0001000 - Document - Document and Entity Information Document</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlans" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlans">
        <link:definition>2119100 - Disclosure - Employee Stock and Incentive Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansEmployeeStockOwnershipPlanDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansEmployeeStockOwnershipPlanDetails">
        <link:definition>2419402 - Disclosure - Employee Stock and Incentive Plans - Employee Stock Ownership Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansNonQualifiedStockOptionsDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansNonQualifiedStockOptionsDetails">
        <link:definition>2419405 - Disclosure - Employee Stock and Incentive Plans - Non-Qualified Stock Options (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansNonQualifiedStockOptionsRangeOfExercisePriceDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansNonQualifiedStockOptionsRangeOfExercisePriceDetails">
        <link:definition>2419406 - Disclosure - Employee Stock and Incentive Plans - Non-Qualified Stock Options, Range of Exercise Price (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansPerformanceSharesAndRestrictedStockUnitsDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansPerformanceSharesAndRestrictedStockUnitsDetails">
        <link:definition>2419407 - Disclosure - Employee Stock and Incentive Plans - Performance Shares and Restricted Stock Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansShareBasedCompensationExpenseDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansShareBasedCompensationExpenseDetails">
        <link:definition>2419404 - Disclosure - Employee Stock and Incentive Plans - Share-Based Compensation Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansStockBasedCompensationDetails" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansStockBasedCompensationDetails">
        <link:definition>2419403 - Disclosure - Employee Stock and Incentive Plans - Stock-Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeStockAndIncentivePlansTables" roleURI="http://www.allete.com/role/EmployeeStockAndIncentivePlansTables">
        <link:definition>2319301 - Disclosure - Employee Stock and Incentive Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValue" roleURI="http://www.allete.com/role/FairValue">
        <link:definition>2110100 - Disclosure - Fair Value</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueFinancialInstrumentsDetails" roleURI="http://www.allete.com/role/FairValueFinancialInstrumentsDetails">
        <link:definition>2410403 - Disclosure - Fair Value - Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueRecurringFairValueMeasuresDetails" roleURI="http://www.allete.com/role/FairValueRecurringFairValueMeasuresDetails">
        <link:definition>2410402 - Disclosure - Fair Value - Recurring Fair Value Measures (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueTables" roleURI="http://www.allete.com/role/FairValueTables">
        <link:definition>2310301 - Disclosure - Fair Value (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpense" roleURI="http://www.allete.com/role/IncomeTaxExpense">
        <link:definition>2116100 - Disclosure - Income Tax Expense</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseDeferredTaxAssetsAndLiabilitiesDetails" roleURI="http://www.allete.com/role/IncomeTaxExpenseDeferredTaxAssetsAndLiabilitiesDetails">
        <link:definition>2416404 - Disclosure - Income Tax Expense - Deferred Tax Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseDetails" roleURI="http://www.allete.com/role/IncomeTaxExpenseDetails">
        <link:definition>2416402 - Disclosure - Income Tax Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseGrossUnrecognizedIncomeTaxBenefitsDetails" roleURI="http://www.allete.com/role/IncomeTaxExpenseGrossUnrecognizedIncomeTaxBenefitsDetails">
        <link:definition>2416406 - Disclosure - Income Tax Expense - Gross Unrecognized Income Tax Benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseNolAndTaxCreditCarryforwardsDetails" roleURI="http://www.allete.com/role/IncomeTaxExpenseNolAndTaxCreditCarryforwardsDetails">
        <link:definition>2416405 - Disclosure - Income Tax Expense - NOL and Tax Credit Carryforwards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseReconciliationOfTaxesFromFederalStatutoryRateToTotalIncomeTaxExpenseDetails" roleURI="http://www.allete.com/role/IncomeTaxExpenseReconciliationOfTaxesFromFederalStatutoryRateToTotalIncomeTaxExpenseDetails">
        <link:definition>2416403 - Disclosure - Income Tax Expense - Reconciliation of Taxes from Federal Statutory Rate to Total Income Tax Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxExpenseTables" roleURI="http://www.allete.com/role/IncomeTaxExpenseTables">
        <link:definition>2316301 - Disclosure - Income Tax Expense (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentInAtc" roleURI="http://www.allete.com/role/InvestmentInAtc">
        <link:definition>2106100 - Disclosure - Investment in ATC</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentInAtcDetails" roleURI="http://www.allete.com/role/InvestmentInAtcDetails">
        <link:definition>2406402 - Disclosure - Investment in ATC (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentInAtcFercComplaintDetails" roleURI="http://www.allete.com/role/InvestmentInAtcFercComplaintDetails">
        <link:definition>2406403 - Disclosure - Investment in ATC - FERC Complaint (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentInAtcTables" roleURI="http://www.allete.com/role/InvestmentInAtcTables">
        <link:definition>2306301 - Disclosure - Investment in ATC (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Investments" roleURI="http://www.allete.com/role/Investments">
        <link:definition>2108100 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsAvailableForSaleSecuritiesDetails" roleURI="http://www.allete.com/role/InvestmentsAvailableForSaleSecuritiesDetails">
        <link:definition>2408403 - Disclosure - Investments - Available-for-sale Securities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsDetails" roleURI="http://www.allete.com/role/InvestmentsDetails">
        <link:definition>2408402 - Disclosure - Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsInvestmentsParentheticalDetails" roleURI="http://www.allete.com/role/InvestmentsInvestmentsParentheticalDetails">
        <link:definition>2408404 - Disclosure - Investments - Investments Parenthetical (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsTables" roleURI="http://www.allete.com/role/InvestmentsTables">
        <link:definition>2308301 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="JointlyOwnedFacilitiesAndProjects" roleURI="http://www.allete.com/role/JointlyOwnedFacilitiesAndProjects">
        <link:definition>2104100 - Disclosure - Jointly-Owned Facilities and Projects</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="JointlyOwnedFacilitiesAndProjectsDetails" roleURI="http://www.allete.com/role/JointlyOwnedFacilitiesAndProjectsDetails">
        <link:definition>2404402 - Disclosure - Jointly-Owned Facilities and Projects (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="JointlyOwnedFacilitiesAndProjectsTables" roleURI="http://www.allete.com/role/JointlyOwnedFacilitiesAndProjectsTables">
        <link:definition>2304301 - Disclosure - Jointly-Owned Facilities and Projects (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPolicies" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPolicies">
        <link:definition>2101100 - Disclosure - Operations and Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesConcentraionOfCreditRiskDetails" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesConcentraionOfCreditRiskDetails">
        <link:definition>2401407 - Disclosure - Operations and Significant Accounting Policies - Concentraion of Credit Risk (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesDetails" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesDetails">
        <link:definition>2401403 - Disclosure - Operations and Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesDetailsCalc2" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesDetailsCalc2">
        <link:definition>2401403 - Disclosure - Operations and Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesPolicies" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesPolicies">
        <link:definition>2201201 - Disclosure - Operations and Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesSupplementalStatementOfCashFlowInformationDetails" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesSupplementalStatementOfCashFlowInformationDetails">
        <link:definition>2401405 - Disclosure - Operations and Significant Accounting Policies - Supplemental Statement of Cash Flow Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OperationsAndSignificantAccountingPoliciesTables" roleURI="http://www.allete.com/role/OperationsAndSignificantAccountingPoliciesTables">
        <link:definition>2301302 - Disclosure - Operations and Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherIncomeExpense" roleURI="http://www.allete.com/role/OtherIncomeExpense">
        <link:definition>2114100 - Disclosure - Other Income (Expense)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherIncomeExpenseDetails" roleURI="http://www.allete.com/role/OtherIncomeExpenseDetails">
        <link:definition>2414402 - Disclosure - Other Income (Expense) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OtherIncomeExpenseTables" roleURI="http://www.allete.com/role/OtherIncomeExpenseTables">
        <link:definition>2314301 - Disclosure - Other Income (Expense) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlans" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlans">
        <link:definition>2118100 - Disclosure - Pension and Other Postretirement Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansAssumptionsUsedToDetermineBenefitObligationAndNetPeriodicBenefitCostsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansAssumptionsUsedToDetermineBenefitObligationAndNetPeriodicBenefitCostsDetails">
        <link:definition>2418410 - Disclosure - Pension and Other Postretirement Benefit Plans - Assumptions Used to Determine Benefit Obligation and Net Periodic Benefit Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansComponentsOfNetPeriodicExpenseDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansComponentsOfNetPeriodicExpenseDetails">
        <link:definition>2418405 - Disclosure - Pension and Other Postretirement Benefit Plans - Components of Net Periodic Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansContributionsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansContributionsDetails">
        <link:definition>2418402 - Disclosure - Pension and Other Postretirement Benefit Plans - Contributions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansCostsRecordedInRegulatoryLongTermAssetsOrLiabilitiesAndAociExpectedToBeRecognizedAsComponentOfNetPensionAndPostretirementBenefitCostsInNextFiscalYearDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansCostsRecordedInRegulatoryLongTermAssetsOrLiabilitiesAndAociExpectedToBeRecognizedAsComponentOfNetPensionAndPostretirementBenefitCostsInNextFiscalYearDetails">
        <link:definition>2418409 - Disclosure - Pension and Other Postretirement Benefit Plans - Costs Recorded in Regulatory Long-Term Assets or Liabilities and AOCI Expected to be Recognized as a Component of Net Pension and Postretirement Benefit Costs in the Next Fiscal Year (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansEstimatedFutureBenefitPaymentsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansEstimatedFutureBenefitPaymentsDetails">
        <link:definition>2418408 - Disclosure - Pension and Other Postretirement Benefit Plans - Estimated Future Benefit Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansInformationForPensionPlansWithAccumulatedBenefitObligationInExcessOfPlanAssetsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansInformationForPensionPlansWithAccumulatedBenefitObligationInExcessOfPlanAssetsDetails">
        <link:definition>2418407 - Disclosure - Pension and Other Postretirement Benefit Plans - Information for Pension Plans with an Accumulated Benefit Obligation in Excess of Plan Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansObligationAndFundedStatusDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansObligationAndFundedStatusDetails">
        <link:definition>2418403 - Disclosure - Pension and Other Postretirement Benefit Plans - Obligation and Funded Status (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansOtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeAndRegulatoryAssetsOrLiabilitiesDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansOtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeAndRegulatoryAssetsOrLiabilitiesDetails">
        <link:definition>2418406 - Disclosure - Pension and Other Postretirement Benefit Plans - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income and Regulatory Assets or Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansPlanAssetAllocationsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansPlanAssetAllocationsDetails">
        <link:definition>2418412 - Disclosure - Pension and Other Postretirement Benefit Plans - Plan Asset Allocations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansRecurringFairValueMeasuresActivityInLevel3Details" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansRecurringFairValueMeasuresActivityInLevel3Details">
        <link:definition>2418414 - Disclosure - Pension and Other Postretirement Benefit Plans - Recurring Fair Value Measures, Activity in Level 3 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansRecurringFairValueMeasuresDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansRecurringFairValueMeasuresDetails">
        <link:definition>2418413 - Disclosure - Pension and Other Postretirement Benefit Plans - Recurring Fair Value Measures (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansSensitivityOfOnePercentagePointChangeInHealthCareTrendRatesDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansSensitivityOfOnePercentagePointChangeInHealthCareTrendRatesDetails">
        <link:definition>2418411 - Disclosure - Pension and Other Postretirement Benefit Plans - Sensitivity of a One-Percentage-Point Change in Health Care Trend Rates (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansTables" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansTables">
        <link:definition>2318301 - Disclosure - Pension and Other Postretirement Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionAndOtherPostretirementBenefitPlansUnrecognizedCostsDetails" roleURI="http://www.allete.com/role/PensionAndOtherPostretirementBenefitPlansUnrecognizedCostsDetails">
        <link:definition>2418404 - Disclosure - Pension and Other Postretirement Benefit Plans - Unrecognized Costs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipment" roleURI="http://www.allete.com/role/PropertyPlantAndEquipment">
        <link:definition>2103100 - Disclosure - Property, Plant and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipmentDetails" roleURI="http://www.allete.com/role/PropertyPlantAndEquipmentDetails">
        <link:definition>2403402 - Disclosure - Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantAndEquipmentTables" roleURI="http://www.allete.com/role/PropertyPlantAndEquipmentTables">
        <link:definition>2303301 - Disclosure - Property, Plant and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialDataUnaudited" roleURI="http://www.allete.com/role/QuarterlyFinancialDataUnaudited">
        <link:definition>2120100 - Disclosure - Quarterly Financial Data (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialDataUnauditedDetails" roleURI="http://www.allete.com/role/QuarterlyFinancialDataUnauditedDetails">
        <link:definition>2420402 - Disclosure - Quarterly Financial Data (Unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialDataUnauditedTables" roleURI="http://www.allete.com/role/QuarterlyFinancialDataUnauditedTables">
        <link:definition>2320301 - Disclosure - Quarterly Financial Data (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLoss" roleURI="http://www.allete.com/role/ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLoss">
        <link:definition>2117100 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossDetails" roleURI="http://www.allete.com/role/ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>2417402 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossTables" roleURI="http://www.allete.com/role/ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossTables">
        <link:definition>2317301 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMatters" roleURI="http://www.allete.com/role/RegulatoryMatters">
        <link:definition>2105100 - Disclosure - Regulatory Matters</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMattersBoswellMercuryEmissionReductionPlanDetails" roleURI="http://www.allete.com/role/RegulatoryMattersBoswellMercuryEmissionReductionPlanDetails">
        <link:definition>2405403 - Disclosure - Regulatory Matters - Boswell Mercury Emission Reduction Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMattersGreatNorthernTransmissionLineGntlDetails" roleURI="http://www.allete.com/role/RegulatoryMattersGreatNorthernTransmissionLineGntlDetails">
        <link:definition>2405404 - Disclosure - Regulatory Matters - Great Northern Transmission Line (GNTL) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMattersRegulatoryAssetsAndLiabilitiesDetails" roleURI="http://www.allete.com/role/RegulatoryMattersRegulatoryAssetsAndLiabilitiesDetails">
        <link:definition>2405405 - Disclosure - Regulatory Matters - Regulatory Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMattersTables" roleURI="http://www.allete.com/role/RegulatoryMattersTables">
        <link:definition>2305301 - Disclosure - Regulatory Matters (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RegulatoryMattersUtilityRatesDetails" roleURI="http://www.allete.com/role/RegulatoryMattersUtilityRatesDetails">
        <link:definition>2405402 - Disclosure - Regulatory Matters - Utility Rates (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIi" roleURI="http://www.allete.com/role/ScheduleIi">
        <link:definition>2121100 - Schedule - Schedule II</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ScheduleIiDetails" roleURI="http://www.allete.com/role/ScheduleIiDetails">
        <link:definition>2421401 - Schedule - Schedule II (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShortTermAndLongTermDebt" roleURI="http://www.allete.com/role/ShortTermAndLongTermDebt">
        <link:definition>2111100 - Disclosure - Short-term and Long-term Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShortTermAndLongTermDebtDetails" roleURI="http://www.allete.com/role/ShortTermAndLongTermDebtDetails">
        <link:definition>2411402 - Disclosure - Short-Term and Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShortTermAndLongTermDebtFinancialCovenantsDetails" roleURI="http://www.allete.com/role/ShortTermAndLongTermDebtFinancialCovenantsDetails">
        <link:definition>2411404 - Disclosure - Short-term and Long-term Debt - Financial Covenants (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShortTermAndLongTermDebtScheduleOfLongTermDebtDetails" roleURI="http://www.allete.com/role/ShortTermAndLongTermDebtScheduleOfLongTermDebtDetails">
        <link:definition>2411403 - Disclosure - Short-term and Long-term Debt - Schedule of Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShortTermAndLongTermDebtTables" roleURI="http://www.allete.com/role/ShortTermAndLongTermDebtTables">
        <link:definition>2311301 - Disclosure - Short-Term and Long-Term Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="ale_A2010RateCaseMember" name="A2010RateCaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A2012WisconsinRateCaseMember" name="A2012WisconsinRateCaseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A39.10to41.35Member" name="A39.10to41.35Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A415SeriesDue2028Member" name="A415SeriesDue2028Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A4415To4865Member" name="A4415To4865Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A485SeriesDue2021Member" name="A485SeriesDue2021Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A490SeriesDue2025Member" name="A490SeriesDue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A495PollutionControlSeriesFDue2022Member" name="A495PollutionControlSeriesFDue2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A510SeriesDue2025Member" name="A510SeriesDue2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A528SeriesDue2020Member" name="A528SeriesDue2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A569SeriesDue2036Member" name="A569SeriesDue2036Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A582SeriesDue2040Member" name="A582SeriesDue2040Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A599SeriesDue2027Member" name="A599SeriesDue2027Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A600SeriesDue2040Member" name="A600SeriesDue2040Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A602SeriesDue2023Member" name="A602SeriesDue2023Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A694SeriesDue2014Member" name="A694SeriesDue2014Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A770SeriesDue2016Member" name="A770SeriesDue2016Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_A817SeriesDue2019Member" name="A817SeriesDue2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ACEAgreementMember" name="ACEAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ACEWindMember" name="ACEWindMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ALERealEstateOtherAdditions" name="ALERealEstateOtherAdditions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEAmendedTermLoanVariableRateDueAugust2015Member" name="ALLETEAmendedTermLoanVariableRateDueAugust2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds3.02DueSeptember2021Member" name="ALLETEBonds3.02DueSeptember2021Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds3.40DueJuly2022Member" name="ALLETEBonds3.40DueJuly2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds3.69DueMarch2024Member" name="ALLETEBonds3.69DueMarch2024Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds3.74DueSeptember2029Member" name="ALLETEBonds3.74DueSeptember2029Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds4.39DueSeptember2044Member" name="ALLETEBonds4.39DueSeptember2044Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds4.95DueMarch2044Member" name="ALLETEBonds4.95DueMarch2044Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ALLETEBonds5.05DueJuly2044Member" name="ALLETEBonds5.05DueJuly2044Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ATCMember" name="ATCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AcquisitionsAbstract" name="AcquisitionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlleteBonds183DueApril2018Member" name="AlleteBonds183DueApril2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlleteBonds320DueJuly2026Member" name="AlleteBonds320DueJuly2026Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlleteBonds330DueOctober2028Member" name="AlleteBonds330DueOctober2028Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlleteBonds408DueJuly2042Member" name="AlleteBonds408DueJuly2042Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlleteBonds421DueOctober2043Member" name="AlleteBonds421DueOctober2043Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlletePropertiesPerformanceAndMaintenanceObligationsMember" name="AlletePropertiesPerformanceAndMaintenanceObligationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AlletesInvestmentInAtcRollForward" name="AlletesInvestmentInAtcRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_AmortizationofPowerPurchaseAgreements" name="AmortizationofPowerPurchaseAgreements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ArmeniaMountainMember" name="ArmeniaMountainMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_AtcSummarizedFinancialDataAbstract" name="AtcSummarizedFinancialDataAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue" name="AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue" name="AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue" name="AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_BasisPointReductiononApprovedRateofReturnonCommonEquity" name="BasisPointReductiononApprovedRateofReturnonCommonEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_Bison4Member" name="Bison4Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_BisonWindEnergyCenterMember" name="BisonWindEnergyCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_BniCoalReclamationLiabilityMember" name="BniCoalReclamationLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_BoswellMercuryEmissionReductionPlanAbstract" name="BoswellMercuryEmissionReductionPlanAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_BoswellUnit4Member" name="BoswellUnit4Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_BusinessAcquisitionAcquiredBusinessNumberofCustomers" name="BusinessAcquisitionAcquiredBusinessNumberofCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_BusinessCombinationAcquisitionRelatedCost" name="BusinessCombinationAcquisitionRelatedCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLongtermDebt" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLongtermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_BusinessSegmentsAbstract" name="BusinessSegmentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CapitalCostSpentToDate" name="CapitalCostSpentToDate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_Capx2020Member" name="Capx2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CivilPenalty" name="CivilPenalty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CleanWaterActAquaticOrganismsMember" name="CleanWaterActAquaticOrganismsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CoalAndTransportationMember" name="CoalAndTransportationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CoalCombustionResidualsMember" name="CoalCombustionResidualsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CoalRailAndShippingContractsAbstract" name="CoalRailAndShippingContractsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CommitmentsGuaranteesAndContingenciesAbstract" name="CommitmentsGuaranteesAndContingenciesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CommonStockAndEarningsPerShareAbstract" name="CommonStockAndEarningsPerShareAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CommunityDevelopmentDistrictObligationAnnualAssessment" name="CommunityDevelopmentDistrictObligationAnnualAssessment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_CommunityDevelopmentDistrictObligationBondInterestRate" name="CommunityDevelopmentDistrictObligationBondInterestRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_CommunityDevelopmentDistrictObligationBondTermInYears" name="CommunityDevelopmentDistrictObligationBondTermInYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_CommunityDevelopmentDistrictObligationOwnershipOfPropertyBenefited" name="CommunityDevelopmentDistrictObligationOwnershipOfPropertyBenefited" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_CompletedProjectMemberMember" name="CompletedProjectMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CondonMember" name="CondonMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedBalanceSheetAbstract" name="ConsolidatedBalanceSheetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedLinesOfCreditMemberMember" name="ConsolidatedLinesOfCreditMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedStatementOfCashFlowsAbstract" name="ConsolidatedStatementOfCashFlowsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedStatementOfComprehensiveIncomeAbstract" name="ConsolidatedStatementOfComprehensiveIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedStatementOfComprehensiveIncomeParentheticalsAbstract" name="ConsolidatedStatementOfComprehensiveIncomeParentheticalsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedStatementOfIncomeAbstract" name="ConsolidatedStatementOfIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ConsolidatedStatementOfShareholdersEquityAbstract" name="ConsolidatedStatementOfShareholdersEquityAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ContractualSalesPrice" name="ContractualSalesPrice" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CurrentCostRecoveryRiderMember" name="CurrentCostRecoveryRiderMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CustomerClassAxis" name="CustomerClassAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CustomerInformationLineItems" name="CustomerInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CustomerInformtaionByCustomerClassDomain" name="CustomerInformtaionByCustomerClassDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CustomerRetentionPercentage" name="CustomerRetentionPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CustomerTypeAxis" name="CustomerTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CustomerTypeDomain" name="CustomerTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_DCTransmissionLinefromSquareButteMember" name="DCTransmissionLinefromSquareButteMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_DebtInstrumentAbstract" name="DebtInstrumentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_DebtInstrumentActualIndebtednessToTotalCapitalRatio" name="DebtInstrumentActualIndebtednessToTotalCapitalRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" name="DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_DeferredCompensationFairValueDisclosure" name="DeferredCompensationFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_DeferredTaxLiabiltyPartnershipBasisDifferences" name="DeferredTaxLiabiltyPartnershipBasisDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_DefinedBenefitPlanBenefitsPaidExcludingKeyEmployees" name="DefinedBenefitPlanBenefitsPaidExcludingKeyEmployees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_DefinedBenefitPlanContributionsByPlanParticipantsExcludingKeyEmployees" name="DefinedBenefitPlanContributionsByPlanParticipantsExcludingKeyEmployees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_DefinedBenefitPlansImpactonBenefitObligationDiscountRate" name="DefinedBenefitPlansImpactonBenefitObligationDiscountRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_DefinedBenefitPlansImpactonBenefitObligationMortalityAssumption" name="DefinedBenefitPlansImpactonBenefitObligationMortalityAssumption" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_DefinedContributionPlanEmployerMatchingContributionAmount" name="DefinedContributionPlanEmployerMatchingContributionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_DerivativesAbstract" name="DerivativesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_EffectiveIncomeTaxRateReconciliationRegulatoryDifferences" name="EffectiveIncomeTaxRateReconciliationRegulatoryDifferences" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ElectricMember" name="ElectricMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ElectricRatesMember" name="ElectricRatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EmployeeStockAndIncentivePlansAbstract" name="EmployeeStockAndIncentivePlansAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EnvironmentalConsentDecreeAxis" name="EnvironmentalConsentDecreeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EnvironmentalConsentDecreeDomain" name="EnvironmentalConsentDecreeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_EnvironmentalLossContingencyLettersOfCredit" name="EnvironmentalLossContingencyLettersOfCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_EnvironmentalLossContingencySuretyBond" name="EnvironmentalLossContingencySuretyBond" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_EnvironmentalLossContingencySuretyBondandLettersofCredit" name="EnvironmentalLossContingencySuretyBondandLettersofCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_EnvironmentalMattersAbstract" name="EnvironmentalMattersAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EnvironmentalMattersLineItems" name="EnvironmentalMattersLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EnvironmentalMattersTable" name="EnvironmentalMattersTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_EquityIssuanceProgramSharesAuthorized" name="EquityIssuanceProgramSharesAuthorized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityIssuanceProgramSharesAvailableForIssuance" name="EquityIssuanceProgramSharesAvailableForIssuance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentApprovedReturnOnCommonEquity" name="EquityMethodInvestmentApprovedReturnOnCommonEquity" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentProposedReturnonCommonEquity" name="EquityMethodInvestmentProposedReturnonCommonEquity" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentScheduleOfSummarizedFinancialDataTableTextBlock" name="EquityMethodInvestmentScheduleOfSummarizedFinancialDataTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract" name="EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt" name="EquityMethodInvestmentSummarizedFinancialInformationLongTermDebt" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpense" name="EquityMethodInvestmentSummarizedFinancialInformationOperatingExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_EquityMethodInvestmentSummarizedFinancialInformationOtherExpense" name="EquityMethodInvestmentSummarizedFinancialInformationOtherExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_EquityMethodInvestmentSummarizedFinancialInformationOtherNonCurrentLiabilities" name="EquityMethodInvestmentSummarizedFinancialInformationOtherNonCurrentLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentTotalExpectedInvestmentforCurrentYear" name="EquityMethodInvestmentTotalExpectedInvestmentforCurrentYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_EstimatedCapitalExpenditures" name="EstimatedCapitalExpenditures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_EstimatedCapitalExpendituresIncludingPastExpenditures" name="EstimatedCapitalExpendituresIncludingPastExpenditures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_EstimatedEnvironmentalComplianceCosts" name="EstimatedEnvironmentalComplianceCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_ExciseTaxPolicyPolicyTextBlock" name="ExciseTaxPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ExecutivePlanMember" name="ExecutivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FERCComplaintAbstract" name="FERCComplaintAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FairValueAbstract" name="FairValueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_FairValueActivityInLevel3" name="FairValueActivityInLevel3" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_FairValueTransfersBetweenLevelsAllLevels" name="FairValueTransfersBetweenLevelsAllLevels" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FercApprovedWholesaleRatesMember" name="FercApprovedWholesaleRatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FinancialCovenantsAbstract" name="FinancialCovenantsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FinancialInstrumentsAbstract" name="FinancialInstrumentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ForwardContractIndexedtoIssuersEquityDilutiveeffect" name="ForwardContractIndexedtoIssuersEquityDilutiveeffect" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ForwardContractsAbstract" name="ForwardContractsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_GainsLossonSaleofAssetsInvestments" name="GainsLossonSaleofAssetsInvestments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_GeneratingCapacityMw" name="GeneratingCapacityMw" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_GeneratingFacilityAxisAxis" name="GeneratingFacilityAxisAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GeneratingFacilityUnitNameDomain" name="GeneratingFacilityUnitNameDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_GoodwillDescription" name="GoodwillDescription" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GrantorTrustMember" name="GrantorTrustMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatNorthernTransmissionLineGNTLAbstract" name="GreatNorthernTransmissionLineGNTLAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatNorthernTransmissionLineMember" name="GreatNorthernTransmissionLineMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatRiverEnergyCapacityOnlyPPAexpires2020Member" name="GreatRiverEnergyCapacityOnlyPPAexpires2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatRiverEnergyPPAexpires2020Member" name="GreatRiverEnergyPPAexpires2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GrossUnrecognizedIncomeTaxBenefitsAbstract" name="GrossUnrecognizedIncomeTaxBenefitsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroOperationsAbstract" name="HydroOperationsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroOperationsAxis" name="HydroOperationsAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroOperationsDomain" name="HydroOperationsDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroOperationsLineItems" name="HydroOperationsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroOperationsTable" name="HydroOperationsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_HydroProjectMember" name="HydroProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ImpairementOfLongLivedAssetsAbstract" name="ImpairementOfLongLivedAssetsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_IncomeTaxExpenseAbstract" name="IncomeTaxExpenseAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_IncomeTaxExpenseBenefitMember" name="IncomeTaxExpenseBenefitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_IncreaseDecreaseInTaxAbstract" name="IncreaseDecreaseInTaxAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_IndustrialDevelopmentVariableRateDemandRefundingRevenueBondsSeries2006Due2025Member" name="IndustrialDevelopmentVariableRateDemandRefundingRevenueBondsSeries2006Due2025Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_InternationalMember" name="InternationalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_InvestmentInAtcAbstract" name="InvestmentInAtcAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_InvestmentsAndOtherAbstract" name="InvestmentsAndOtherAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_InvestmentsCashAndCashEquivalentsFairValueDisclosure" name="InvestmentsCashAndCashEquivalentsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_InvestmentsParentheticalAbstract" name="InvestmentsParentheticalAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_JointlyOwnedElectricFacilityPercentageNotOwned" name="JointlyOwnedElectricFacilityPercentageNotOwned" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_JointlyOwnedElectricFacilityTextBlock" name="JointlyOwnedElectricFacilityTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_JointlyOwnedFacilitiesandProjectsAbstract" name="JointlyOwnedFacilitiesandProjectsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_LakeBentonMember" name="LakeBentonMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_LargePowerCustomerMember" name="LargePowerCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_LeasingAgreementsAbstract" name="LeasingAgreementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_LengthOfNoticeRequiredToTerminateYears" name="LengthOfNoticeRequiredToTerminateYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_LettersofCreditDrawn" name="LettersofCreditDrawn" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_LongTermContractForPurchaseOfElectricPowerFixedCapacityCarges" name="LongTermContractForPurchaseOfElectricPowerFixedCapacityCarges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchasedMw" name="LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchasedMw" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchasedMwh" name="LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputBeingPurchasedMwh" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputPurchasedMw" name="LongTermContractForPurchaseOfElectricPowerShareOfPlantOutputPurchasedMw" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_LongTermContractForPurchaseOfElectricPowerTermOfContractYears" name="LongTermContractForPurchaseOfElectricPowerTermOfContractYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_ManitobaHydroPPAexpires2040Member" name="ManitobaHydroPPAexpires2040Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ManitobaHydroPPAexpiresMay2020Member" name="ManitobaHydroPPAexpiresMay2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ManitobaHydroPpaExpires2035Member" name="ManitobaHydroPpaExpires2035Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ManitobaHydroPpaExpiresApril2022Member" name="ManitobaHydroPpaExpiresApril2022Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MedicarePartDRegulatoryAssetMember" name="MedicarePartDRegulatoryAssetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_MembersInterestPurchaseAgreement" name="MembersInterestPurchaseAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MinnkotaPpaMember" name="MinnkotaPpaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_Morelikelythannotdefined" name="Morelikelythannotdefined" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MunicipalCustomersMember" name="MunicipalCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NOVConsentDecreeMember" name="NOVConsentDecreeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NOVConsentDecreeObligationMember" name="NOVConsentDecreeObligationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NaturalGasMember" name="NaturalGasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NolAndTaxCreditCarryforwardsLineItems" name="NolAndTaxCreditCarryforwardsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NolAndTaxCreditCarryforwardsTable" name="NolAndTaxCreditCarryforwardsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NorthDakotaWindDevelopmentAbstract" name="NorthDakotaWindDevelopmentAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NorthDakotaWindDevelopmentAxis" name="NorthDakotaWindDevelopmentAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NorthDakotaWindDevelopmentDomain" name="NorthDakotaWindDevelopmentDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NorthDakotaWindDevelopmentLineItems" name="NorthDakotaWindDevelopmentLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NorthDakotaWindDevelopmentTable" name="NorthDakotaWindDevelopmentTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_NumberOfCustomers" name="NumberOfCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_NumberOfOptionsAbstract" name="NumberOfOptionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_NumberOfProjects" name="NumberOfProjects" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_NumberOfSharesAbstract" name="NumberOfSharesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OliverWindIPpaMember" name="OliverWindIPpaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OliverWindIiPpaMember" name="OliverWindIiPpaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_OperatingLossAndTaxCreditCarryforwardsValuationAllowance" name="OperatingLossAndTaxCreditCarryforwardsValuationAllowance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_OperationsAndSignificantAccountingPoliciesAbstract" name="OperationsAndSignificantAccountingPoliciesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OtherIncomeExpenseAbstract" name="OtherIncomeExpenseAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OtherLongTermDebt1080Due20122037Member" name="OtherLongTermDebt1080Due20122037Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OtherMattersAbstract" name="OtherMattersAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_PalmCoastParkCommunityDevelopmentDistrictMember" name="PalmCoastParkCommunityDevelopmentDistrictMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_PensionAndOtherPostretirementBenefitPlansAbstract" name="PensionAndOtherPostretirementBenefitPlansAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_PerformanceAndMaintenanceObligations" name="PerformanceAndMaintenanceObligations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_PowerPurchaseAgreementCurrent" name="PowerPurchaseAgreementCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_PowerPurchaseAgreementNoncurrent" name="PowerPurchaseAgreementNoncurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_PowerPurchaseAgreementsAbstract" name="PowerPurchaseAgreementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_PowerPurchaseAgreementsDeferredTaxAsset" name="PowerPurchaseAgreementsDeferredTaxAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_ProjectStatusAxis" name="ProjectStatusAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ProjectStatusDomain" name="ProjectStatusDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ProjectinProgressMember" name="ProjectinProgressMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_PurchaseOptionAxis" name="PurchaseOptionAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_PurchaseOptionDomain" name="PurchaseOptionDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_Purchaseoption" name="Purchaseoption" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_QuarterlyFinancialDataUnauditedAbstract" name="QuarterlyFinancialDataUnauditedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RainyRiverEnergyMember" name="RainyRiverEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RateInformationByTypeDomain" name="RateInformationByTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RateTypeAxis" name="RateTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_RealEstateSalesRevenueRecognitionMinimumContractPriceCashCollectionsRequirement" name="RealEstateSalesRevenueRecognitionMinimumContractPriceCashCollectionsRequirement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeAbstract" name="ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossAbstract" name="ReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RegulatedOperationsMember" name="RegulatedOperationsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RegulatoryAssetsAndLiabilitiesLineItems" name="RegulatoryAssetsAndLiabilitiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RegulatoryMattersAbstract" name="RegulatoryMattersAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RetailCustomersMember" name="RetailCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RetailMember" name="RetailMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleIiAbstract" name="ScheduleIiAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleOfCustomerInformationTable" name="ScheduleOfCustomerInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleOfRegulatoryAssetsAndLiabilitiesTable" name="ScheduleOfRegulatoryAssetsAndLiabilitiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleOfUtilityGeneratingFacilitiesLineItems" name="ScheduleOfUtilityGeneratingFacilitiesLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleOfUtilityGeneratingFacilitiesTable" name="ScheduleOfUtilityGeneratingFacilitiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SeniorUnsecuredNotes599Due2017Member" name="SeniorUnsecuredNotes599Due2017Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SensitivityAnalysisAxis" name="SensitivityAnalysisAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SensitivityAnalysisDomain" name="SensitivityAnalysisDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SensitivityAnalysisLineItems" name="SensitivityAnalysisLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SensitivityAnalysisMember" name="SensitivityAnalysisMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SensitivityAnalysisTable" name="SensitivityAnalysisTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodTotalGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodTotalGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnearnedGrantAward" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnearnedGrantAward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnearnedGrantAwardWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnearnedGrantAwardWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ShortTermAndLongTermDebtAbstract" name="ShortTermAndLongTermDebtAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SquareButteCoalFiredUnitMember" name="SquareButteCoalFiredUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SquareButtePpaMember" name="SquareButtePpaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_StockIssuedDuringPeriodSharesForwardSale" name="StockIssuedDuringPeriodSharesForwardSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_StockIssuedDuringPeriodSharesShareBasedCompensationAndEsopGross" name="StockIssuedDuringPeriodSharesShareBasedCompensationAndEsopGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_StockIssuedDuringPeriodValueForwardSale" name="StockIssuedDuringPeriodValueForwardSale" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_StockIssuedDuringPeriodValueShareBasedCompensationAndEsopGross" name="StockIssuedDuringPeriodValueShareBasedCompensationAndEsopGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_StormLakeIIMember" name="StormLakeIIMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_StormLakeIMember" name="StormLakeIMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_SummaryOfOperatingLossAndTaxCreditCarryforwardsTableTextBlock" name="SummaryOfOperatingLossAndTaxCreditCarryforwardsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_TerminationFee" name="TerminationFee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_TownCenterCommunityDevelopmentDistrictMember" name="TownCenterCommunityDevelopmentDistrictMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TradeAccountsReceivableAbstract" name="TradeAccountsReceivableAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TransmissionAbstract" name="TransmissionAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TransmissionAxis" name="TransmissionAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TransmissionDomain" name="TransmissionDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_TransmissionLineCapacityKv" name="TransmissionLineCapacityKv" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_TransmissionLineItems" name="TransmissionLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_TransmissionLineLengthMiles" name="TransmissionLineLengthMiles" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_TransmissionTable" name="TransmissionTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_USLargeCapMember" name="USLargeCapMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_USMidCapGrowthMember" name="USMidCapGrowthMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_USSmallCapMember" name="USSmallCapMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_VariableDemandRevenueRefundingBondsSeries1997AbcDue20132020Member" name="VariableDemandRevenueRefundingBondsSeries1997AbcDue20132020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_VebaMember" name="VebaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WaterMember" name="WaterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WeightedAverageExercisePriceAbstract" name="WeightedAverageExercisePriceAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WeightedAverageGrantDateFairValueAbstract" name="WeightedAverageGrantDateFairValueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WholesaleAndRetailContraAfudcMember" name="WholesaleAndRetailContraAfudcMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WindDevelopmentProjectMember" name="WindDevelopmentProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
