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  <xs:element id="ale_MinnesotaPowerMember" abstract="true" name="MinnesotaPowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ScheduleofCashCashEquivalentsandRestrictedCashTableTextBlock" abstract="false" name="ScheduleofCashCashEquivalentsandRestrictedCashTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="ale_SWLPMember" abstract="true" name="SWLPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_GuarantorObligationsCollateralHeldDirectlyorbyThirdPartiesAmount" abstract="false" name="GuarantorObligationsCollateralHeldDirectlyorbyThirdPartiesAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_InterestandInvestmentEarningsMember" abstract="true" name="InterestandInvestmentEarningsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_EnvironmentalMattersTable" abstract="true" name="EnvironmentalMattersTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_SaleOfRenewableDevelopmentProjectsMember" abstract="true" name="SaleOfRenewableDevelopmentProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ALLETECleanEnergyOtherMember" abstract="true" name="ALLETECleanEnergyOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_MinnkotaPowerMember" abstract="true" name="MinnkotaPowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AFUDCEquityMember" abstract="true" name="AFUDCEquityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ApproximateAnnualReductionInPretaxIncomeForFERCProposalToLimitIncentiveAdderALLETEsProportionateShare" abstract="false" name="ApproximateAnnualReductionInPretaxIncomeForFERCProposalToLimitIncentiveAdderALLETEsProportionateShare" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_AlleteIncMember" abstract="true" name="AlleteIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_RetailCustomersMember" abstract="true" name="RetailCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_GuaranteeEntityandTypeDomain" abstract="true" name="GuaranteeEntityandTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_RateTypeDomain" abstract="true" name="RateTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_NonControllingInterestDetailsLineItems" abstract="true" name="NonControllingInterestDetailsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_WindTurbineGeneratorsMember" abstract="true" name="WindTurbineGeneratorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherPostretirementBenefitPlans" abstract="false" name="OtherPostretirementBenefitPlans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_SouthShoreEnergyMember" abstract="true" name="SouthShoreEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_CurrentCostRecoveryRiderMember" abstract="true" name="CurrentCostRecoveryRiderMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_EffectiveIncomeTaxRateReconciliationRegulatoryDifferences" abstract="false" name="EffectiveIncomeTaxRateReconciliationRegulatoryDifferences" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_OtherIncomeExpenseOtherMember" abstract="true" name="OtherIncomeExpenseOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ALLETESouthWindMember" abstract="true" name="ALLETESouthWindMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_PublicUtilitiesReserveForInterimRates" abstract="false" name="PublicUtilitiesReserveForInterimRates" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_PowerPurchaseAgreementCurrentLiability" abstract="false" name="PowerPurchaseAgreementCurrentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_GlenUllinEnergyCenterMember" abstract="true" name="GlenUllinEnergyCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_LongtermContractsforSaleofElectricPowerDomain" abstract="true" name="LongtermContractsforSaleofElectricPowerDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_IncreaseDecreaseInTaxAbstract" abstract="true" name="IncreaseDecreaseInTaxAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_ManufacturedGasPlantMember" abstract="true" name="ManufacturedGasPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ComponentofOtherIncomeExpenseOtherAxis" abstract="true" name="ComponentofOtherIncomeExpenseOtherAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_ElectricRatesMember" abstract="true" name="ElectricRatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_SquareButteCoalFiredUnitMember" abstract="true" name="SquareButteCoalFiredUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherPowerSuppliersMember" abstract="true" name="OtherPowerSuppliersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_DeferredCompensationFairValueDisclosure" abstract="false" name="DeferredCompensationFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_Nobles2Member" abstract="true" name="Nobles2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_GeneratingCapacityCounterpartyOwnedMW" abstract="false" name="GeneratingCapacityCounterpartyOwnedMW" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="ale_ExpectedPeriodforCostsofCompliance" abstract="false" name="ExpectedPeriodforCostsofCompliance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ale_MedicarePartDRegulatoryAssetMember" abstract="true" name="MedicarePartDRegulatoryAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_NonJurisdictionalLandSalesMember" abstract="true" name="NonJurisdictionalLandSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_MinnkotaSalesAgreementMember" abstract="true" name="MinnkotaSalesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AlletesInvestmentInAtcRollForward" abstract="true" name="AlletesInvestmentInAtcRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_GeneratingFacilityAxisAxis" abstract="true" name="GeneratingFacilityAxisAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_UnamortizedDebtIssuanceExpenseDebtCurrent" abstract="false" name="UnamortizedDebtIssuanceExpenseDebtCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_LongtermContractforPurchaseofElectricPowerTermofContractYears" abstract="false" name="LongtermContractforPurchaseofElectricPowerTermofContractYears" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ale_ALLETEBonds498DueApril2033Member" abstract="true" name="ALLETEBonds498DueApril2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_RegulatoryAssetsAndLiabilitiesLineItems" abstract="true" name="RegulatoryAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_BoswellUnits1And2NetPlantAndEquipmentMember" abstract="true" name="BoswellUnits1And2NetPlantAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_SouthPeakMember" abstract="true" name="SouthPeakMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_LongtermContractMember" abstract="true" name="LongtermContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_GeneratingCapacitySubjecttoTaxEquityFinancing" abstract="false" name="GeneratingCapacitySubjecttoTaxEquityFinancing" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="ale_FuelPurchasedPowerandGasUtility" abstract="false" name="FuelPurchasedPowerandGasUtility" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_ManufacturedGasPlantCurrent" abstract="false" name="ManufacturedGasPlantCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_MPUCMember" abstract="true" name="MPUCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherIncomeExpenseOtherTable" abstract="true" name="OtherIncomeExpenseOtherTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_RateTypeAxis" abstract="true" name="RateTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_GenerationTypeAxis" abstract="true" name="GenerationTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_CommercialMember" abstract="true" name="CommercialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue" abstract="false" name="AvailableforsaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_EquityMethodInvestmentApprovedReturnonCommonEquityIncludingIncentiveAdder" abstract="false" name="EquityMethodInvestmentApprovedReturnonCommonEquityIncludingIncentiveAdder" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ale_NewEnergyMember" abstract="true" name="NewEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AmortizationfromtheRemeasurementofDeferredIncomeTaxesforEquityMethodInvestments" abstract="false" name="AmortizationfromtheRemeasurementofDeferredIncomeTaxesforEquityMethodInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_DocumentAndEntityInformationAbstract" abstract="true" name="DocumentAndEntityInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_EnvironmentalMattersLineItems" abstract="true" name="EnvironmentalMattersLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_CaddoMember" abstract="true" name="CaddoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ALLETECleanEnergyMember" abstract="true" name="ALLETECleanEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_MunicipalMember" abstract="true" name="MunicipalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_LongtermContractsforSaleofElectricPowerAxis" abstract="true" name="LongtermContractsforSaleofElectricPowerAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_CostRecoveryRidersMember" abstract="true" name="CostRecoveryRidersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_TaconiteHarborEnergyCenterMember" abstract="true" name="TaconiteHarborEnergyCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ComponentofOtherIncomeExpenseOtherDomain" abstract="true" name="ComponentofOtherIncomeExpenseOtherDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_DebtLongTermandShortTermCombinedAmountGross" abstract="false" name="DebtLongTermandShortTermCombinedAmountGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_WholesaleAndRetailContraAfudcMember" abstract="true" name="WholesaleAndRetailContraAfudcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_ResidentialMember" abstract="true" name="ResidentialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_TenaskaMember" abstract="true" name="TenaskaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_TenaskaPPAMember" abstract="true" name="TenaskaPPAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_DebtCurrentGross" abstract="false" name="DebtCurrentGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_UnamortizedDebtIssuanceExpenseLongTermDebtExcludingCurrentMaturities" abstract="false" name="UnamortizedDebtIssuanceExpenseLongTermDebtExcludingCurrentMaturities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_RegulatedOperationsMember" abstract="true" name="RegulatedOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_LongtermPSAMember" abstract="true" name="LongtermPSAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_NonControllingInterestDetailsTable" abstract="true" name="NonControllingInterestDetailsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_SaleOfWindEnergyFacilityMember" abstract="true" name="SaleOfWindEnergyFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue" abstract="false" name="AvailableforsaleSecuritiesDebtMaturitiesAfterThreeYearsThroughFiveYearsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_ATCMember" abstract="true" name="ATCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_SquareButtePpaMember" abstract="true" name="SquareButtePpaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_FuelAdjustmentClauseMember" abstract="true" name="FuelAdjustmentClauseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_DiamondSpringMember" abstract="true" name="DiamondSpringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_TransmissionFormulaRatesMember" abstract="true" name="TransmissionFormulaRatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_DebtInstrumentActualIndebtednessToTotalCapitalRatio" abstract="false" name="DebtInstrumentActualIndebtednessToTotalCapitalRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ale_TransmissionServicesUtility" abstract="false" name="TransmissionServicesUtility" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_OperatingandMaintenance" abstract="false" name="OperatingandMaintenance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_CoalCombustionResidualsMember" abstract="true" name="CoalCombustionResidualsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherIncomeExpenseOtherLineItems" abstract="true" name="OtherIncomeExpenseOtherLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_GenerationTypeDomain" abstract="true" name="GenerationTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_FuelAdjustmentClause2022Member" abstract="true" name="FuelAdjustmentClause2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_RevenueOtherThanCustomerRevenue" abstract="false" name="RevenueOtherThanCustomerRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_PowerPurchaseAgreementNoncurrentLiability" abstract="false" name="PowerPurchaseAgreementNoncurrentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_ScheduleOfRegulatoryAssetsAndLiabilitiesTable" abstract="true" name="ScheduleOfRegulatoryAssetsAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_NorthDakotaInvestmentTaxCreditsSubjecttoRefundMember" abstract="true" name="NorthDakotaInvestmentTaxCreditsSubjecttoRefundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_BNIEnergyMember" abstract="true" name="BNIEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_CashProceedsFromSaleOfAvailableForSaleSecurities" abstract="false" name="CashProceedsFromSaleOfAvailableForSaleSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_ProvisionPaymentForInterimRateRefund" abstract="false" name="ProvisionPaymentForInterimRateRefund" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_CIPConsolidatedFilingMemberMember" abstract="true" name="CIPConsolidatedFilingMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_CustomerClassDomain" abstract="true" name="CustomerClassDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_SquareButteMember" abstract="true" name="SquareButteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_OtherIncomeExpenseOtherAbstract" abstract="true" name="OtherIncomeExpenseOtherAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ale_SuperiorWIMember" abstract="true" name="SuperiorWIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_IndustrialMember" abstract="true" name="IndustrialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_CustomerClassAxis" abstract="true" name="CustomerClassAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_A2022MinnesotaGeneralRateReviewMember" abstract="true" name="A2022MinnesotaGeneralRateReviewMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue" abstract="false" name="AvailableforsaleSecuritiesDebtMaturitiesAfterOneYearThroughThreeYearsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_BniCoalReclamationLiabilityMember" abstract="true" name="BniCoalReclamationLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_AmortizationofPowerPurchaseAgreements" abstract="false" name="AmortizationofPowerPurchaseAgreements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ale_DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" abstract="false" name="DebtInstrumentRequiredIndebtednessToTotalCapitalRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ale_PensionandOtherPostretirementBenefitPlansNonServiceCreditMember" abstract="true" name="PensionandOtherPostretirementBenefitPlansNonServiceCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ale_GuaranteeEntityandTypeAxis" abstract="true" name="GuaranteeEntityandTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ale_BasisPointIncentiveAdder" abstract="false" name="BasisPointIncentiveAdder" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ale_PaymentsForPurchaseOfAvailableForSaleSecurities" abstract="false" name="PaymentsForPurchaseOfAvailableForSaleSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
