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| <link:definition> 2428402 - Disclosure - Employee Benefit Plans (Details) </link:definition> |
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| <link:definition> 2429402 - Disclosure - Fair Value of Financial Instruments (Details) </link:definition> |
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| <link:definition> 2329301 - Disclosure - Fair Value of Financial Instruments (Tables) </link:definition> |
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| | | <link:roleType id="LeasesDetails" roleURI="http://www.blackhillscorp.com/role/LeasesDetails"> |
| <link:definition> 2433402 - Disclosure - Leases (Details) </link:definition> |
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| <link:usedOn> link:calculationLink </link:usedOn> |
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| <link:definition> 2433407 - Disclosure - Leases: Future Minimum Payments (Details) </link:definition> |
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| <link:definition> 2433407 - Disclosure - Leases: Future Minimum Payments (Details) </link:definition> |
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| <link:usedOn> link:calculationLink </link:usedOn> |
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| <link:definition> 2433404 - Disclosure - Leases: Supplemental Balance Sheet Information (Details) </link:definition> |
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| <link:definition> 2433405 - Disclosure - Leases: Supplemental Cash Flow Information (Details) </link:definition> |
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| <link:definition> 2333301 - Disclosure - Leases (Tables) </link:definition> |
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| <link:definition> 2401402 - Disclosure - Management Statement (Details) </link:definition> |
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| <link:definition> 2416404 - Disclosure - Regulatory Accounting: Rate Review (Details) </link:definition> |
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| <link:definition> 2416402 - Disclosure - Regulatory Accounting: Regulatory Assets (Details) </link:definition> |
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| <link:definition> 2416403 - Disclosure - Regulatory Accounting: Regulatory Liabilities (Details) </link:definition> |
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| <link:usedOn> link:calculationLink </link:usedOn> |
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| <link:definition> 2419402 - Disclosure - Related-Party Transactions (Details) </link:definition> |
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| <link:definition> 2107100 - Disclosure - Revenue: </link:definition> |
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| <link:definition> 2407402 - Disclosure - Revenue (Details) </link:definition> |
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| <link:definition> 2307301 - Disclosure - Revenue (Tables) </link:definition> |
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| <xsd:element abstract="true" id="bkh_AllowanceForFundsUsedDuringConstructionMember" name="AllowanceForFundsUsedDuringConstructionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_AmountofIncreasesoughtinGeneratingCapacityUnderEnvironmentalImprovementAdjustmentTariffMember" name="AmountofIncreasesoughtinGeneratingCapacityUnderEnvironmentalImprovementAdjustmentTariffMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_CoalPurchasedMember" name="CoalPurchasedMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_CorriedaleWindProjectMember" name="CorriedaleWindProjectMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_CostOfRemovalMember" name="CostOfRemovalMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_CustomerSubscriptionPeriodWasCompletedWithCustomerInterestFulfillingAllAvailableEnergyMember" name="CustomerSubscriptionPeriodWasCompletedWithCustomerInterestFulfillingAllAvailableEnergyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_DeferredIncomeTaxChargesaMember" name="DeferredIncomeTaxChargesaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_EnergySoldToCheyenneLightMember" name="EnergySoldToCheyenneLightMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_FlowThroughAccountingMember" name="FlowThroughAccountingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_FuelAndPurchasedPower" name="FuelAndPurchasedPower" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_GroundLeasewithWygenIIIMember" name="GroundLeasewithWygenIIIMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_HappyJackWindPurchasePowerAgreeementMember" name="HappyJackWindPurchasePowerAgreeementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_HorizonPointSharedFacilityRevenuesMember" name="HorizonPointSharedFacilityRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_InterestPayableRelatedParty" name="InterestPayableRelatedParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/> |
| <xsd:element id="bkh_LesseeSupplementalBalanceSheetInformationRelatedtoLeasesTableTextBlock" name="LesseeSupplementalBalanceSheetInformationRelatedtoLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_LesseeSupplementalCashFlowInformationRelatedtoLeasesTableTextBlock" name="LesseeSupplementalCashFlowInformationRelatedtoLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_LesseeSupplementalWeightedAverageScheduleRelatedtoLeasesTableTextBlock" name="LesseeSupplementalWeightedAverageScheduleRelatedtoLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_NewTotalSoughtInGeneratingCapacityUnderEnvironmentalImprovementAdjustmentTariffMember" name="NewTotalSoughtInGeneratingCapacityUnderEnvironmentalImprovementAdjustmentTariffMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_NonCashDividendsDistributedToParentBySubsidiaries" name="NonCashDividendsDistributedToParentBySubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_OtherRegulatoryAssetsMember" name="OtherRegulatoryAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_OtherRegulatoryLiabilitiesMember" name="OtherRegulatoryLiabilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized" name="PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_PublicUtilitiesNumberofElectricUtilitiesJointlyOwningWindProject" name="PublicUtilitiesNumberofElectricUtilitiesJointlyOwningWindProject" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/> |
| <xsd:element id="bkh_PublicUtilitiesPropertyPlantandEquipmentCostOfPlantInvestment" name="PublicUtilitiesPropertyPlantandEquipmentCostOfPlantInvestment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="bkh_PurchaseOfExcessEnergyCheyenneLightMember" name="PurchaseOfExcessEnergyCheyenneLightMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_PurchaseOfNaturalGasCheyenneLightMember" name="PurchaseOfNaturalGasCheyenneLightMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_RegulatedUtilityMarketOffSystemSalesMember" name="RegulatedUtilityMarketOffSystemSalesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_RegulatedUtilityRetailMember" name="RegulatedUtilityRetailMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_RegulatedUtilityTransmissionMember" name="RegulatedUtilityTransmissionMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_RegulatedUtilityWholesaleMember" name="RegulatedUtilityWholesaleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleOfDefinedBenefitPlansContributionsTableTextBlock" name="ScheduleOfDefinedBenefitPlansContributionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleOfRelatedPartyAccountsReceivableAndPayableTableTextBlock" name="ScheduleOfRelatedPartyAccountsReceivableAndPayableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleOfRelatedPartyNotesTableTextBlock" name="ScheduleOfRelatedPartyNotesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleOfRevenuesAndPurchasesFromRelatedPartiesTableTextBlock" name="ScheduleOfRevenuesAndPurchasesFromRelatedPartiesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleofRelatedPartyInterestIncomeExpenseTableTextBlock" name="ScheduleofRelatedPartyInterestIncomeExpenseTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_ScheduleofRelatedPartyNotesPayabletoParentCompanyTableTextBlock" name="ScheduleofRelatedPartyNotesPayabletoParentCompanyTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SilverSageWindPowerPurchaseAgreementMember" name="SilverSageWindPowerPurchaseAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SouthDakotaElectricMember" name="SouthDakotaElectricMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SouthDakotaElectricandWyomingElectricMember" name="SouthDakotaElectricandWyomingElectricMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SouthDakotaPublicUtilitiesCommissionSDPUCMember" name="SouthDakotaPublicUtilitiesCommissionSDPUCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SupplementalCashFlowInformationLineItems" name="SupplementalCashFlowInformationLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_SupplementalCashFlowInformationTable" name="SupplementalCashFlowInformationTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_UtilityMoneyPoolMember" name="UtilityMoneyPoolMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="bkh_UtilityPlantMegawattCapacity" name="UtilityPlantMegawattCapacity" nillable="true" substitutionGroup="xbrli:item" type="num:powerItemType" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="bkh_VegetationManagementMember" name="VegetationManagementMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="bkh_WyomingPublicServiceCommissionWPSCandSouthDakotaPublicUtilitiesCommissionSDPUCMember" name="WyomingPublicServiceCommissionWPSCandSouthDakotaPublicUtilitiesCommissionSDPUCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| </xsd:schema> |