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  <xs:element id="bkh_NaturalGasDeliveryCommitmentsAndContractsTerm" abstract="false" name="NaturalGasDeliveryCommitmentsAndContractsTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bkh_ColoradoElectricAndBlackHillsColoradoIPPMember" abstract="true" name="ColoradoElectricAndBlackHillsColoradoIPPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_NumberOfOneYearExtensionOptions" abstract="false" name="NumberOfOneYearExtensionOptions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bkh_EffectiveIncomeTaxReconciliationAmortizationOfExcessDeferredIncomeTaxExpense" abstract="false" name="EffectiveIncomeTaxReconciliationAmortizationOfExcessDeferredIncomeTaxExpense" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bkh_BusinessGroupAxis" abstract="true" name="BusinessGroupAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bkh_UnrecordedUnconditionalPurchaseObligationDueafterFiveYearsa" abstract="false" name="UnrecordedUnconditionalPurchaseObligationDueafterFiveYearsa" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:energyItemType"/>
  <xs:element id="bkh_ONEOKOklahomaMember" abstract="true" name="ONEOKOklahomaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_ArkansasPublicServiceCommissionAPSCMember" abstract="true" name="ArkansasPublicServiceCommissionAPSCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_MacquarieEnergyLLCSupplyAgreementMember" abstract="true" name="MacquarieEnergyLLCSupplyAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_PacificorpTransmissionMember" abstract="true" name="PacificorpTransmissionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_CheyennePrairieSimpleCycleCombustionTurbineMember" abstract="true" name="CheyennePrairieSimpleCycleCombustionTurbineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SeniorUnsecuredNotesDue2033Member" abstract="true" name="SeniorUnsecuredNotesDue2033Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_TCColoradoSolarLLCMember" abstract="true" name="TCColoradoSolarLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_ReturnSeekingAssetsMember" abstract="true" name="ReturnSeekingAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_NumberofMegawattsCapacitySold" abstract="false" name="NumberofMegawattsCapacitySold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="bkh_AssetsUsedtoAcquireOtherInvestments" abstract="false" name="AssetsUsedtoAcquireOtherInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_SouthDakotaElectricMember" abstract="true" name="SouthDakotaElectricMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bkh_FixedforFloatSwapsPurchasedMember" abstract="true" name="FixedforFloatSwapsPurchasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_DerivativeLiabilitiesCurrentMember" abstract="true" name="DerivativeLiabilitiesCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_PerformanceSharesLiabilityAwardsMember" abstract="true" name="PerformanceSharesLiabilityAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_NumberOfMegawattsCapacityPurchased" abstract="false" name="NumberOfMegawattsCapacityPurchased" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="bkh_OperatingLossCarryforwardsWithNoExpirationDate" abstract="false" name="OperatingLossCarryforwardsWithNoExpirationDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_SolarMember" abstract="true" name="SolarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_TransportationMember" abstract="true" name="TransportationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_DerivativeLiabilitiesNoncurrentMember" abstract="true" name="DerivativeLiabilitiesNoncurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_NNGDemarcMember" abstract="true" name="NNGDemarcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_JointlyOwnedFacilitiesUtilityandNonRegulatedTextBlock" abstract="false" name="JointlyOwnedFacilitiesUtilityandNonRegulatedTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="bkh_ColoradoPublicUtilitiesCommissionCPUCMember" abstract="true" name="ColoradoPublicUtilitiesCommissionCPUCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SettlementOfPlanToProvideTCJAAndStateTaxReformBenefitsToCustomersAnnually" abstract="false" name="SettlementOfPlanToProvideTCJAAndStateTaxReformBenefitsToCustomersAnnually" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_SeniorUnsecuredNotesDue2030Member" abstract="true" name="SeniorUnsecuredNotesDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_RevenueRefundedToCustomersAsAResultOfTheTCJATaxBenefits" abstract="false" name="RevenueRefundedToCustomersAsAResultOfTheTCJATaxBenefits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_WyodakPlantMember" abstract="true" name="WyodakPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_BlackHillsElectricGenerationandColoradoElectricMember" abstract="true" name="BlackHillsElectricGenerationandColoradoElectricMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_PublicUtilitiesTermExtensionOfSystemSafteyAndIntegrityRider" abstract="false" name="PublicUtilitiesTermExtensionOfSystemSafteyAndIntegrityRider" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bkh_FuelTypeDomain" abstract="true" name="FuelTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_AtTheMarketEquityOfferingProgramSharesIssued" abstract="false" name="AtTheMarketEquityOfferingProgramSharesIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bkh_JointlyOwnedUtilityPlantProportionateOwnershipShareOfOtherParty" abstract="false" name="JointlyOwnedUtilityPlantProportionateOwnershipShareOfOtherParty" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bkh_CheyennePrairieMember" abstract="true" name="CheyennePrairieMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SeniorUnsecuredNotesDue2046Member" abstract="true" name="SeniorUnsecuredNotesDue2046Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_ManufacturedGasPlantMember" abstract="true" name="ManufacturedGasPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_CushionGasDepreciableMember" abstract="true" name="CushionGasDepreciableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_BlackHillsEnergyKansasGasMember" abstract="true" name="BlackHillsEnergyKansasGasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets" abstract="false" name="DefinedBenefitPlanAlternativeInvestmentsFairValueOfPlanAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_FirstMortgageBondsDue2032Member" abstract="true" name="FirstMortgageBondsDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_MDUMontanaDakotaUtilitiesMember" abstract="true" name="MDUMontanaDakotaUtilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SeniorUnsecuredNotesDue2029Member" abstract="true" name="SeniorUnsecuredNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_PowerPurchaseAgreementsMember" abstract="true" name="PowerPurchaseAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_WygenIGeneratingFacilityMember" abstract="true" name="WygenIGeneratingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SouthDakotaElectricandWyomingElectricMember" abstract="true" name="SouthDakotaElectricandWyomingElectricMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_KernRiverOpalMember" abstract="true" name="KernRiverOpalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_InterestExpenseIncurredNetOfAmountsCapitalizedIncludingAmortizationOfDebtIssuanceCostsPremiumsAndDiscountsMember" abstract="true" name="InterestExpenseIncurredNetOfAmountsCapitalizedIncludingAmortizationOfDebtIssuanceCostsPremiumsAndDiscountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutCashPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPayoutCashPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bkh_DefinedContributionPlanEmployeeVestingPeriod" abstract="false" name="DefinedContributionPlanEmployeeVestingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bkh_BlackHillsWyomingMember" abstract="true" name="BlackHillsWyomingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_WindMember" abstract="true" name="WindMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_UnrecordedUnconditionalPurchaseObligationDueWithinFourYears" abstract="false" name="UnrecordedUnconditionalPurchaseObligationDueWithinFourYears" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:energyItemType"/>
  <xs:element id="bkh_NumberOfDefinedPensionPlans" abstract="false" name="NumberOfDefinedPensionPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bkh_SilverSageWindPowerPurchaseAgreementMember" abstract="true" name="SilverSageWindPowerPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_PacificorpPurchasePowerAgreementMember" abstract="true" name="PacificorpPurchasePowerAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_LongTermContractForTransmissionOfElectricPowerDomain" abstract="true" name="LongTermContractForTransmissionOfElectricPowerDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_ScheduleOfEmployerContributionToEmployeeBenefitPlansTableTextBlock" abstract="false" name="ScheduleOfEmployerContributionToEmployeeBenefitPlansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="bkh_DefinedContributionPlanCompanyRetirementMember" abstract="true" name="DefinedContributionPlanCompanyRetirementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_WeightedAverageGrantDateofFairValueShareBasedCompensationArrangement" abstract="false" name="WeightedAverageGrantDateofFairValueShareBasedCompensationArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="bkh_IntegratedGenerationMember" abstract="true" name="IntegratedGenerationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_BondIssuanceCostsMember" abstract="true" name="BondIssuanceCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_CommonCollectiveTrustCashAndCashEquivalentsMember" abstract="true" name="CommonCollectiveTrustCashAndCashEquivalentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_SettlementTotalOfPlanToProvideTCJAAndStateTaxReformBenefitsToCustomers" abstract="false" name="SettlementTotalOfPlanToProvideTCJAAndStateTaxReformBenefitsToCustomers" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_PowerPurchasedMember" abstract="true" name="PowerPurchasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_TransmissionOtherMember" abstract="true" name="TransmissionOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bkh_DefinedBenefitPlanAssumptionsUsedInCalculatingNetPeriodicBenefitCostExpectedRateofReturnOnAssetsForNextFiscalYear" abstract="false" name="DefinedBenefitPlanAssumptionsUsedInCalculatingNetPeriodicBenefitCostExpectedRateofReturnOnAssetsForNextFiscalYear" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bkh_EmployeeServiceShareBasedCompensationOtherThanOptionsTotalPayoutValue" abstract="false" name="EmployeeServiceShareBasedCompensationOtherThanOptionsTotalPayoutValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bkh_SeniorUnsecuredNotesDue2026Member" abstract="true" name="SeniorUnsecuredNotesDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
