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  <xsd:element id="ale_CIPActualSpend" name="CIPActualSpend" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CIPAnnualFilingMember" name="CIPAnnualFilingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CIPEnergySavingsGoal" name="CIPEnergySavingsGoal" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_CIPInvestmentGoal" name="CIPInvestmentGoal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_CIPInvestmentGoalYearThree" name="CIPInvestmentGoalYearThree" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_CIPInvestmentGoalYearTwo" name="CIPInvestmentGoalYearTwo" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_CIPSpendRequirement" name="CIPSpendRequirement" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_CIPTriennialFilingMember" name="CIPTriennialFilingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_CampRipleyFinancingMember" name="CampRipleyFinancingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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 id="ale_CapitalCostsSpentToDateRecovered" name="CapitalCostsSpentToDateRecovered" 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 abstract="true" id="ale_ChanarambieVikingMember" name="ChanarambieVikingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ChanarambieVikingPPAexpires2018Member" name="ChanarambieVikingPPAexpires2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ChanarambieVikingPPAexpires2023Member" name="ChanarambieVikingPPAexpires2023Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ChangesinCashFlowProjectionsMember" name="ChangesinCashFlowProjectionsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_CombinedCycleNaturalGasFiredGeneratingFacilityMember" name="CombinedCycleNaturalGasFiredGeneratingFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_CommunityDevelopmentDistrictObligationOwnershipOfPropertyBenefited" name="CommunityDevelopmentDistrictObligationOwnershipOfPropertyBenefited" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_ConservationImprovementProgramMember" name="ConservationImprovementProgramMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ContingentConsiderationAxis" name="ContingentConsiderationAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ContingentConsiderationDomain" name="ContingentConsiderationDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_ContractPaymentNonCurrent" name="ContractPaymentNonCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_CostRecoveryRidersMember" name="CostRecoveryRidersMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_CustomerClassDomain" name="CustomerClassDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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 id="ale_DebtInstrumentActualIndebtednessToTotalCapitalRatio" name="DebtInstrumentActualIndebtednessToTotalCapitalRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_DebtInstrumentRenewalTerm" name="DebtInstrumentRenewalTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" name="DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_DecreaseinInvestmentofEquityMethodInvestee" name="DecreaseinInvestmentofEquityMethodInvestee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_DecreasetoDeferredIncomeTaxes" name="DecreasetoDeferredIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_DeferredFederalIncomeTaxExpenseBenefitRemeasurementofDeferredIncomeTaxes" name="DeferredFederalIncomeTaxExpenseBenefitRemeasurementofDeferredIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_DeferredIncomeTaxesMember" name="DeferredIncomeTaxesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_DeferredTaxAssetsRegulatoryLiabilities" name="DeferredTaxAssetsRegulatoryLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_DeferredTaxLiabilitiesRegulatoryAssetsforBenefitObligations" name="DeferredTaxLiabilitiesRegulatoryAssetsforBenefitObligations" 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_DefinedBenefitPlanContributionsByPlanParticipantsExcludingKeyEmployees" name="DefinedBenefitPlanContributionsByPlanParticipantsExcludingKeyEmployees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_DefinedBenefitPlanPlanAssetsCashContributionsbyEmployer" name="DefinedBenefitPlanPlanAssetsCashContributionsbyEmployer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="ale_DiscountProvidedtoEITECustomers" name="DiscountProvidedtoEITECustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" 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 id="ale_EffectiveIncomeTaxRateReconciliationRemeasurementofDeferredIncomeTaxes" name="EffectiveIncomeTaxRateReconciliationRemeasurementofDeferredIncomeTaxes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" 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_EnergyIntensiveTradeExposedCustomerRatesMember" name="EnergyIntensiveTradeExposedCustomerRatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_EquityMethodInvestmentApprovedReturnonCommonEquityIncludingIncentiveAdder" name="EquityMethodInvestmentApprovedReturnonCommonEquityIncludingIncentiveAdder" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_EquityMethodInvestmentExpectedAdditionalInvestmentNextFiscalYear" name="EquityMethodInvestmentExpectedAdditionalInvestmentNextFiscalYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" 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_EquityMethodInvestmentProposedReturnonCommonEquityIncludingIncentiveAdder" name="EquityMethodInvestmentProposedReturnonCommonEquityIncludingIncentiveAdder" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <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_EstimatedCapitalExpendituresIncludingPastExpenditures" name="EstimatedCapitalExpendituresIncludingPastExpenditures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_EstimatedDiscounttobeProvidedDuringtheNextTwelveMonths" name="EstimatedDiscounttobeProvidedDuringtheNextTwelveMonths" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <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 id="ale_ExpectedProceedsfromFutureIssuanceofFirstMortgageBonds" name="ExpectedProceedsfromFutureIssuanceofFirstMortgageBonds" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_FERCAuthorizedReturnonCommonEquity" name="FERCAuthorizedReturnonCommonEquity" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_FERCAuthorizedReturnonEquityIncludingIncentiveAdder" name="FERCAuthorizedReturnonEquityIncludingIncentiveAdder" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_FERCComplaint1Member" name="FERCComplaint1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FERCComplaint2Member" name="FERCComplaint2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FERCMember" name="FERCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_FairValueInputsRevenueGrowthRatefromAcquisition" name="FairValueInputsRevenueGrowthRatefromAcquisition" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" 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 id="ale_FinancingReceivableTerm" name="FinancingReceivableTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_FuelPurchasedPowerandGasUtilityMember" name="FuelPurchasedPowerandGasUtilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_FutureDebtInstrumentInterestRateStatedPercentage" name="FutureDebtInstrumentInterestRateStatedPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_GeneratingCapacityCounterpartyOwnedMW" name="GeneratingCapacityCounterpartyOwnedMW" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_GeneratingCapacityJointlyOwnedMW" name="GeneratingCapacityJointlyOwnedMW" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_GeneratingCapacityOwnedMW" name="GeneratingCapacityOwnedMW" 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 abstract="true" id="ale_GenerationTypeAxis" name="GenerationTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GenerationTypeDomain" name="GenerationTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatNorthernTransmissionLineCertificateofNeedandRoutePermitMember" name="GreatNorthernTransmissionLineCertificateofNeedandRoutePermitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_GreatRiverEnergyCapacityOnlyPPABeginning2016expires2020Member" name="GreatRiverEnergyCapacityOnlyPPABeginning2016expires2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatRiverEnergyCapacityOnlyPPABeginning2017expires2020Member" name="GreatRiverEnergyCapacityOnlyPPABeginning2017expires2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GreatRiverEnergyMember" name="GreatRiverEnergyMember" 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_GuaranteeEntityandTypeAxis" name="GuaranteeEntityandTypeAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_GuaranteeEntityandTypeDomain" name="GuaranteeEntityandTypeDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_GuarantorObligationsCollateralHeldDirectlyorbyThirdPartiesAmount" name="GuarantorObligationsCollateralHeldDirectlyorbyThirdPartiesAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_IncomeTaxExpenseMember" name="IncomeTaxExpenseMember" 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 id="ale_IncreaseDecreaseinAnnualDepreciationExpenseBasedonRegulatoryOrder" name="IncreaseDecreaseinAnnualDepreciationExpenseBasedonRegulatoryOrder" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_IncreasetoRegulatoryAssets" name="IncreasetoRegulatoryAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_IncreasetoRegulatoryLiabilities" name="IncreasetoRegulatoryLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" 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 id="ale_IntangibleAssetsAcquired" name="IntangibleAssetsAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_IntegratedResourcePlanMember" name="IntegratedResourcePlanMember" 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_InvestmentinATCMember" name="InvestmentinATCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_JointlyOwnedbyALLETEandDairylandPowerCooperativeMember" name="JointlyOwnedbyALLETEandDairylandPowerCooperativeMember" 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_LargestCustomerMember" name="LargestCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_LineofCreditAmountPledgedforLettersofCredit" name="LineofCreditAmountPledgedforLettersofCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" 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 abstract="true" id="ale_LongTermFinanceReceivableforLandInventoryMember" name="LongTermFinanceReceivableforLandInventoryMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_LongTermServiceAgreementsMember" name="LongTermServiceAgreementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_LongtermContractforPurchaseofElectricPowerTermofContractYears" name="LongtermContractforPurchaseofElectricPowerTermofContractYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_LongtermContractforSaleofElectricPowerShareofPlantOutputBeingSoldMW" name="LongtermContractforSaleofElectricPowerShareofPlantOutputBeingSoldMW" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_LongtermContractsforSaleofElectricPowerAxis" name="LongtermContractsforSaleofElectricPowerAxis" nillable="true" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_LongtermContractsforSaleofElectricPowerDomain" name="LongtermContractsforSaleofElectricPowerDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MPUCMember" name="MPUCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ManitobaHydroMember" name="ManitobaHydroMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ManitobaHydroPPABeginningJune2017expiresMay2020Member" name="ManitobaHydroPPABeginningJune2017expiresMay2020Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <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_ManufacturedGasPlantMember" name="ManufacturedGasPlantMember" 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 abstract="true" id="ale_MinnesotaPowerMember" name="MinnesotaPowerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MinnesotaSolarEnergyStandardCampRipleyProjectMember" name="MinnesotaSolarEnergyStandardCampRipleyProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MinnesotaSolarEnergyStandardCommunitySolarGardenProjectOwnedandOperatedMember" name="MinnesotaSolarEnergyStandardCommunitySolarGardenProjectOwnedandOperatedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MinnesotaSolarEnergyStandardCommunitySolarGardenProjectPurchasedOutputMember" name="MinnesotaSolarEnergyStandardCommunitySolarGardenProjectPurchasedOutputMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_MinnkotaPowerMember" name="MinnkotaPowerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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 abstract="true" id="ale_MinnkotaSalesAgreementMember" name="MinnkotaSalesAgreementMember" 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_NO2NAAQSMember" name="NO2NAAQSMember" 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_NaturalGasMember" name="NaturalGasMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NaturalGasPPAMember" name="NaturalGasPPAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_NaturalGasRatesMember" name="NaturalGasRatesMember" 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_NorthDakotaInvestmentTaxCreditsSubjecttoRefundMember" name="NorthDakotaInvestmentTaxCreditsSubjecttoRefundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_NumberOfCustomers" name="NumberOfCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_NumberOfProjects" name="NumberOfProjects" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <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 abstract="true" id="ale_OliverWindMember" name="OliverWindMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OperatingRevenueNonutilityMember" name="OperatingRevenueNonutilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OperatingRevenueUtilityMember" name="OperatingRevenueUtilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OtherLongTermDebtMember" name="OtherLongTermDebtMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_OzoneNAAQSMember" name="OzoneNAAQSMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_PSCWMember" name="PSCWMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_PaymentsMember" name="PaymentsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_PowerPurchaseAgreementCurrentLiability" name="PowerPurchaseAgreementCurrentLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_PowerPurchaseAgreementMember" name="PowerPurchaseAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_PowerPurchaseAgreementNoncurrentLiability" name="PowerPurchaseAgreementNoncurrentLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="ale_PowerPurchaseAgreementsCurrentAsset" name="PowerPurchaseAgreementsCurrentAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_PowerPurchaseAgreementsDeferredTaxAsset" name="PowerPurchaseAgreementsDeferredTaxAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_PowerPurchaseAgreementsNoncurrentAsset" name="PowerPurchaseAgreementsNoncurrentAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="ale_ProposedReturnonCommonEquitybyRegulatoryOrganization" name="ProposedReturnonCommonEquitybyRegulatoryOrganization" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_ProposedReturnonEquitybyRegulatoryOrganizationIncludingIncentiveAdder" name="ProposedReturnonEquitybyRegulatoryOrganizationIncludingIncentiveAdder" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_ProvisionforInterimRateRefund" name="ProvisionforInterimRateRefund" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="ale_PurchaseOptionAsset" name="PurchaseOptionAsset" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_QualifiedRetirementDeathorDisabilityMember" name="QualifiedRetirementDeathorDisabilityMember" 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 abstract="true" id="ale_RealEstateSaleConsiderationAbstract" name="RealEstateSaleConsiderationAbstract" nillable="true" substitutionGroup="xbrli:item" 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_ReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossAbstract" name="ReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RegulatedOperationsMemberMember" name="RegulatedOperationsMemberMember" 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_RemeasurementofDeferredIncomeTaxesResultingfromtheTCJAAbstract" name="RemeasurementofDeferredIncomeTaxesResultingfromtheTCJAAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RemeasurementofDeferredIncomeTaxesasaResultoftheTCJALineItems" name="RemeasurementofDeferredIncomeTaxesasaResultoftheTCJALineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RemeasurementofDeferredIncomeTaxesasaResultoftheTCJATable" name="RemeasurementofDeferredIncomeTaxesasaResultoftheTCJATable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_RenewableCostRecoveryRiderMember" name="RenewableCostRecoveryRiderMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_RequestedReturnonCommonEquityFiledwithRegulatoryOrganization" name="RequestedReturnonCommonEquityFiledwithRegulatoryOrganization" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_ReserveforInterimRateRefund" name="ReserveforInterimRateRefund" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_ResourcePackageMember" name="ResourcePackageMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_SWLPMember" name="SWLPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_ScheduleofIntangibleAssetsTableTextBlock" name="ScheduleofIntangibleAssetsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleofPriorPeriodReclassificationAdjustmentsLineItems" name="ScheduleofPriorPeriodReclassificationAdjustmentsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ScheduleofPriorPeriodReclassificationAdjustmentsTable" name="ScheduleofPriorPeriodReclassificationAdjustmentsTable" 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 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_ShellEnergyMember" name="ShellEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_ShellEnergyPPAMember" name="ShellEnergyPPAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SilverBayPowerCoalLiquidandGaseousFuelsfiredUnitsMember" name="SilverBayPowerCoalLiquidandGaseousFuelsfiredUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SilverBayPowerMember" name="SilverBayPowerMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SilverBayPowerSalesAgreementthrough2031Years20162019Member" name="SilverBayPowerSalesAgreementthrough2031Years20162019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_SitecontingencyLossExposureAccruedandBestEstimateofLossExposureinExcessofAccrual" name="SitecontingencyLossExposureAccruedandBestEstimateofLossExposureinExcessofAccrual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SolarEnergyGenerationMember" name="SolarEnergyGenerationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_SolarEnergyPPAMember" name="SolarEnergyPPAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_SolarEnergyStandardMandateOverallMandatePercentage" name="SolarEnergyStandardMandateOverallMandatePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_SolarEnergyStandardMandateQualifyingCapacityforSmallScaleSolarMandate" name="SolarEnergyStandardMandateQualifyingCapacityforSmallScaleSolarMandate" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant" />
  <xsd:element id="ale_SolarEnergyStandardMandateSmallScaleSolarMandatePercentage" name="SolarEnergyStandardMandateSmallScaleSolarMandatePercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <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_SquareButteMember" name="SquareButteMember" 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_SuretyBondsandLettersofCreditMember" name="SuretyBondsandLettersofCreditMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TenaskaMember" name="TenaskaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TenaskaPPAMember" name="TenaskaPPAMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="ale_TerminalGrowthRate" name="TerminalGrowthRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" 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_TonkaWaterMember" name="TonkaWaterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <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_TransAltaMember" name="TransAltaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TransAltaOffPeakHoursPPAexpires2019Member" name="TransAltaOffPeakHoursPPAexpires2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_TransAltaOnPeakHoursPPAexpire2019Member" name="TransAltaOnPeakHoursPPAexpire2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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 id="ale_TransmissionLineLengthMiles" name="TransmissionLineLengthMiles" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="ale_U.S.WaterServicesMember" name="U.S.WaterServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_VoluntaryTerminationorInvoluntaryTerminationWithoutCauseMember" name="VoluntaryTerminationorInvoluntaryTerminationWithoutCauseMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WaterEnergySystemsTechnologyofNevadaInc.Member" name="WaterEnergySystemsTechnologyofNevadaInc.Member" 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_WaterRatesMember" name="WaterRatesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" 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_WholesaleElectricContractTerminationEffectiveJune2019Member" name="WholesaleElectricContractTerminationEffectiveJune2019Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WholesaleElectricContractsExpireDecember2024Member" name="WholesaleElectricContractsExpireDecember2024Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WindConstructionProjectMember" name="WindConstructionProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="ale_WindTurbineGeneratorsMember" name="WindTurbineGeneratorsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
