<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/Acquisition" xlink:href="bkh-20171231.xsd#Acquisition" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/AcquisitionDetails" xlink:href="bkh-20171231.xsd#AcquisitionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/AcquisitionTables" xlink:href="bkh-20171231.xsd#AcquisitionTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/AssetRetirementObligations" xlink:href="bkh-20171231.xsd#AssetRetirementObligations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/AssetRetirementObligationsDetails" xlink:href="bkh-20171231.xsd#AssetRetirementObligationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/AssetRetirementObligationsTables" xlink:href="bkh-20171231.xsd#AssetRetirementObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPolicies" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAccountsReceivableDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAccruedLiabilitiesDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesAccruedLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAntiDilutiveSharesDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesAntiDilutiveSharesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesEarningsPerShareDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesGoodwillDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesImprovementToEmployeeShareBasedPaymentAccountingDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesImprovementToEmployeeShareBasedPaymentAccountingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesMaterialsSuppliesAndFuelDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesMaterialsSuppliesAndFuelDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesReclassificationOfCertainTaxEffectsFromAccumulatedOtherComprehensiveIncomeDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesReclassificationOfCertainTaxEffectsFromAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesRegulatoryAssetsAndLiabilitiesDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesRegulatoryAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesScheduleOfIntangibleAssetsDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesScheduleOfIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesSegmentReportingDetails" xlink:href="bkh-20171231.xsd#BusinessDescriptionAndSignificantAccountingPoliciesSegmentReportingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionPolicies" xlink:href="bkh-20171231.xsd#BusinessDescriptionPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessDescriptionTables" xlink:href="bkh-20171231.xsd#BusinessDescriptionTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformation" xlink:href="bkh-20171231.xsd#BusinessSegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationCapitalExpendituresAndAssetAcquisitionsDetails" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationCapitalExpendituresAndAssetAcquisitionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationCorporateExpenseReallocationDetails" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationCorporateExpenseReallocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetails" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetailsCalc2" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationPropertyPlantAndEquipmentDetails" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationSegmentAssetsDetails" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationSegmentAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/BusinessSegmentInformationTables" xlink:href="bkh-20171231.xsd#BusinessSegmentInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingencies" xlink:href="bkh-20171231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesEnvironmentalContingenciesDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesEnvironmentalContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesFuturePurchaseAgreementRelatedPartyDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesFuturePurchaseAgreementRelatedPartyDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesLongTermPurchaseCommitmentDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesLongTermPurchaseCommitmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesPowerSalesAgreementsDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesPowerSalesAgreementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesReimbursementAgreementDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesReimbursementAgreementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesRelatedPartyLeaseDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesRelatedPartyLeaseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesTables" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesUnconditionalPurchaseObligationsDetails" xlink:href="bkh-20171231.xsd#CommitmentsAndContingenciesUnconditionalPurchaseObligationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ComprehensiveIncomeLossDetails" xlink:href="bkh-20171231.xsd#ComprehensiveIncomeLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ComprehensiveIncomeLossTables" xlink:href="bkh-20171231.xsd#ComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedBalanceSheets" xlink:href="bkh-20171231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="bkh-20171231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="bkh-20171231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:href="bkh-20171231.xsd#ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:href="bkh-20171231.xsd#ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfEquity" xlink:href="bkh-20171231.xsd#ConsolidatedStatementsOfEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfIncomeLoss" xlink:href="bkh-20171231.xsd#ConsolidatedStatementsOfIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DiscontinuedOperations" xlink:href="bkh-20171231.xsd#DiscontinuedOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DiscontinuedOperationsDetails" xlink:href="bkh-20171231.xsd#DiscontinuedOperationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DiscontinuedOperationsEquityInvestmentsInUnconsolidatedSubsidiariesDetails" xlink:href="bkh-20171231.xsd#DiscontinuedOperationsEquityInvestmentsInUnconsolidatedSubsidiariesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DiscontinuedOperationsImpairmentOfLongLivedAssetsDetails" xlink:href="bkh-20171231.xsd#DiscontinuedOperationsImpairmentOfLongLivedAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DiscontinuedOperationsTables" xlink:href="bkh-20171231.xsd#DiscontinuedOperationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/DocumentAndEntityInformationDocumentAndEntityInformation" xlink:href="bkh-20171231.xsd#DocumentAndEntityInformationDocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlans" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAccumulatedBenefitObligationDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansAccumulatedBenefitObligationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAccumulatedOtherComprehensiveIncomeDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAmountsRecognizedInConsolidatedBalanceSheetDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansAmountsRecognizedInConsolidatedBalanceSheetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansChangesInBenefitObligationDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansChangesInBenefitObligationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansChangesInPlanAssetsDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansChangesInPlanAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansComponentsOfNetPeriodicExpenseDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansComponentsOfNetPeriodicExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansDefinedBenefitPlansAssumptionsDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansDefinedBenefitPlansAssumptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansEmployeeBenefitPlansFairValueMeasurementsDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansEmployeeBenefitPlansFairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansPlanContributionsDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansPlanContributionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansProjectedBenefitPlanPaymentsDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansProjectedBenefitPlanPaymentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansTables" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EmployeeBenefitPlansTargetPlanAssetsAllocationDetails" xlink:href="bkh-20171231.xsd#EmployeeBenefitPlansTargetPlanAssetsAllocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/Equity" xlink:href="bkh-20171231.xsd#Equity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityAtTheMarketEquityOfferingProgramDetails" xlink:href="bkh-20171231.xsd#EquityAtTheMarketEquityOfferingProgramDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityCommonStockOfferingDetails" xlink:href="bkh-20171231.xsd#EquityCommonStockOfferingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityDividendReinvestmentAndStockPurchasePlanDetails" xlink:href="bkh-20171231.xsd#EquityDividendReinvestmentAndStockPurchasePlanDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityEquityCompensationPlansDetails" xlink:href="bkh-20171231.xsd#EquityEquityCompensationPlansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityNoncontrollingInterestInSubsidiaryDetails" xlink:href="bkh-20171231.xsd#EquityNoncontrollingInterestInSubsidiaryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityPerformanceSharePlanDetails" xlink:href="bkh-20171231.xsd#EquityPerformanceSharePlanDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityPreferredStockDetails" xlink:href="bkh-20171231.xsd#EquityPreferredStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityRestrictedStockDetails" xlink:href="bkh-20171231.xsd#EquityRestrictedStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityStockOptionsDetails" xlink:href="bkh-20171231.xsd#EquityStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityTables" xlink:href="bkh-20171231.xsd#EquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/EquityUnitsDetails" xlink:href="bkh-20171231.xsd#EquityUnitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueMeasurements" xlink:href="bkh-20171231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueMeasurementsBalanceSheetLocationDetails" xlink:href="bkh-20171231.xsd#FairValueMeasurementsBalanceSheetLocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueMeasurementsBalanceSheetOffsettingDetails" xlink:href="bkh-20171231.xsd#FairValueMeasurementsBalanceSheetOffsettingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueMeasurementsTables" xlink:href="bkh-20171231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueOfFinancialInstruments" xlink:href="bkh-20171231.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueOfFinancialInstrumentsDetails" xlink:href="bkh-20171231.xsd#FairValueOfFinancialInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="bkh-20171231.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/Guarantees" xlink:href="bkh-20171231.xsd#Guarantees" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/GuaranteesDetails" xlink:href="bkh-20171231.xsd#GuaranteesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/GuaranteesTables" xlink:href="bkh-20171231.xsd#GuaranteesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxes" xlink:href="bkh-20171231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesCarryforwardsStateAndForeignTaxCreditsDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesCarryforwardsStateAndForeignTaxCreditsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesCurrentAndDeferredIncomeTaxExpenseBenefitDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesCurrentAndDeferredIncomeTaxExpenseBenefitDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesDeferredIncomeTaxAssetsAndLiabilitiesDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesDeferredIncomeTaxAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesEffectiveTaxRateDifferencesFromStatutoryTaxRatesDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesEffectiveTaxRateDifferencesFromStatutoryTaxRatesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesInterestPenaltiesAndAuditsDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesInterestPenaltiesAndAuditsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesNetOperatingLossCarryforwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesTables" xlink:href="bkh-20171231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/IncomeTaxesTaxCutAndJobsActDetails" xlink:href="bkh-20171231.xsd#IncomeTaxesTaxCutAndJobsActDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/JointlyOwnedFacilities" xlink:href="bkh-20171231.xsd#JointlyOwnedFacilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/JointlyOwnedFacilitiesDetails" xlink:href="bkh-20171231.xsd#JointlyOwnedFacilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/JointlyOwnedFacilitiesTables" xlink:href="bkh-20171231.xsd#JointlyOwnedFacilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebt" xlink:href="bkh-20171231.xsd#LongTermDebt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtAggregateMaturitiesOfLongTermDebtDetails" xlink:href="bkh-20171231.xsd#LongTermDebtAggregateMaturitiesOfLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtAssumptionOfLongTermDebtDetails" xlink:href="bkh-20171231.xsd#LongTermDebtAssumptionOfLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtDebtTransactionsDetails" xlink:href="bkh-20171231.xsd#LongTermDebtDebtTransactionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtDeferredFinancingCostsDetails" xlink:href="bkh-20171231.xsd#LongTermDebtDeferredFinancingCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtDetails" xlink:href="bkh-20171231.xsd#LongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtDividendRestrictionsDetails" xlink:href="bkh-20171231.xsd#LongTermDebtDividendRestrictionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/LongTermDebtTables" xlink:href="bkh-20171231.xsd#LongTermDebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/NotesPayable" xlink:href="bkh-20171231.xsd#NotesPayable" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/NotesPayableDetails" xlink:href="bkh-20171231.xsd#NotesPayableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/NotesPayableTables" xlink:href="bkh-20171231.xsd#NotesPayableTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasExplorationAndProductionIndustriesDisclosureTables" xlink:href="bkh-20171231.xsd#OilAndGasExplorationAndProductionIndustriesDisclosureTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnaudited" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedCapitalizedCostsDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedCapitalizedCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedChangeInStandardMeasureOfDiscountedFutureCashNetFlowsDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedChangeInStandardMeasureOfDiscountedFutureCashNetFlowsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedCostsIncurredOilAndGasDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedCostsIncurredOilAndGasDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedProvedDevelopedAndUndevelopedOilAndGasReserveDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedProvedDevelopedAndUndevelopedOilAndGasReserveDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedResultsOfOperationsOilAndGasDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedResultsOfOperationsOilAndGasDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedStandardMeasureOfDiscountedFutureNetCashFlowsDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedStandardMeasureOfDiscountedFutureNetCashFlowsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedUnprovedPropertiesExcludedFromAmortizationDetails" xlink:href="bkh-20171231.xsd#OilAndGasReservesUnauditedUnprovedPropertiesExcludedFromAmortizationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OperatingLeases" xlink:href="bkh-20171231.xsd#OperatingLeases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OperatingLeasesDetails" xlink:href="bkh-20171231.xsd#OperatingLeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OperatingLeasesTables" xlink:href="bkh-20171231.xsd#OperatingLeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OtherComprehensiveIncome" xlink:href="bkh-20171231.xsd#OtherComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/OtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:href="bkh-20171231.xsd#OtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/PropertyPlantAndEquipment" xlink:href="bkh-20171231.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentDetails" xlink:href="bkh-20171231.xsd#PropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentDetailsCalc2" xlink:href="bkh-20171231.xsd#PropertyPlantAndEquipmentDetailsCalc2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentTables" xlink:href="bkh-20171231.xsd#PropertyPlantAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnaudited" xlink:href="bkh-20171231.xsd#QuarterlyHistoricalDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnauditedDetails" xlink:href="bkh-20171231.xsd#QuarterlyHistoricalDataUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnauditedTables" xlink:href="bkh-20171231.xsd#QuarterlyHistoricalDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RegulatoryMattersElectricUtilitiesRateActivityDetails" xlink:href="bkh-20171231.xsd#RegulatoryMattersElectricUtilitiesRateActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RegulatoryMattersGasUtilitiesRateActivityDetails" xlink:href="bkh-20171231.xsd#RegulatoryMattersGasUtilitiesRateActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RegulatoryMattersRegulatoryMattersNotes" xlink:href="bkh-20171231.xsd#RegulatoryMattersRegulatoryMattersNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivities" xlink:href="bkh-20171231.xsd#RiskManagementActivities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesCashFlowHedgesDetails" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesCashFlowHedgesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesDerivativesNotDesignatedAsHedgeInstrumentsDetails" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesDerivativesNotDesignatedAsHedgeInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesDiscontinuedOperationsDetails" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesDiscontinuedOperationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesFinancingActivitiesDetails" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesFinancingActivitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesTables" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/RiskManagementActivitiesUtilitiesDetails" xlink:href="bkh-20171231.xsd#RiskManagementActivitiesUtilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ScheduleIiConsolidatedValuationAndQualifyingAccounts" xlink:href="bkh-20171231.xsd#ScheduleIiConsolidatedValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ScheduleIiConsolidatedValuationAndQualifyingAccountsDetails" xlink:href="bkh-20171231.xsd#ScheduleIiConsolidatedValuationAndQualifyingAccountsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/ScheduleOfFairValuesDetails" xlink:href="bkh-20171231.xsd#ScheduleOfFairValuesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/SupplementalCashFlowInformationDetails" xlink:href="bkh-20171231.xsd#SupplementalCashFlowInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/SupplementalCashFlowInformationTables" xlink:href="bkh-20171231.xsd#SupplementalCashFlowInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.blackhillscorp.com/role/SupplementalDisclosureOfCashFlowInformation" xlink:href="bkh-20171231.xsd#SupplementalDisclosureOfCashFlowInformation" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/Acquisition" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/AcquisitionDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/AcquisitionTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/AssetRetirementObligations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/AssetRetirementObligationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/AssetRetirementObligationsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_cf9ed09f-3dd1-4a4b-d3fc-3b0db18c1b40" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_cf9ed09f-3dd1-4a4b-d3fc-3b0db18c1b40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_f7173c6e-6dcb-ce4b-bd07-2c0e34ab99f7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent_f7173c6e-6dcb-ce4b-bd07-2c0e34ab99f7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerAdvancesAndDepositsCurrent" xlink:label="loc_us-gaap_CustomerAdvancesAndDepositsCurrent_3f37bf70-9499-d653-3d8f-38f96766ed4f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_CustomerAdvancesAndDepositsCurrent_3f37bf70-9499-d653-3d8f-38f96766ed4f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaap_InterestPayableCurrent_f399ab19-6853-cf94-a0cf-c511e9e00641" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_InterestPayableCurrent_f399ab19-6853-cf94-a0cf-c511e9e00641" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerAdvancesForConstruction" xlink:label="loc_us-gaap_CustomerAdvancesForConstruction_c5d4bb96-601f-e2b1-6c97-437907fde318" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_CustomerAdvancesForConstruction_c5d4bb96-601f-e2b1-6c97-437907fde318" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_00b000cf-7f1d-4891-7244-daf9f6335db0" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_00b000cf-7f1d-4891-7244-daf9f6335db0" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesAntiDilutiveSharesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_86e61cf2-b7b2-e230-65f1-5a2b152f3a30" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_86e61cf2-b7b2-e230-65f1-5a2b152f3a30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements_e39e5156-06d6-49b1-df8b-0301bc94cf73" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements_e39e5156-06d6-49b1-df8b-0301bc94cf73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_cee10fe8-a4bb-491c-22f6-69a723d6a718" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_cee10fe8-a4bb-491c-22f6-69a723d6a718" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesGoodwillDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesImprovementToEmployeeShareBasedPaymentAccountingDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesMaterialsSuppliesAndFuelDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryRawMaterialsAndSupplies" xlink:label="loc_us-gaap_InventoryRawMaterialsAndSupplies_d5be07ae-7c90-fc6f-bb53-0b8a948026e3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:to="loc_us-gaap_InventoryRawMaterialsAndSupplies_d5be07ae-7c90-fc6f-bb53-0b8a948026e3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnergyRelatedInventoryOtherFossilFuel" xlink:label="loc_us-gaap_EnergyRelatedInventoryOtherFossilFuel_a5dbcc8c-5bc0-ffb2-1d6c-5779ea8b56d0" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:to="loc_us-gaap_EnergyRelatedInventoryOtherFossilFuel_a5dbcc8c-5bc0-ffb2-1d6c-5779ea8b56d0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnergyRelatedInventoryNaturalGasInStorage" xlink:label="loc_us-gaap_EnergyRelatedInventoryNaturalGasInStorage_03e78846-24fc-c35e-7c3a-034096025f1f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:to="loc_us-gaap_EnergyRelatedInventoryNaturalGasInStorage_03e78846-24fc-c35e-7c3a-034096025f1f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesReclassificationOfCertainTaxEffectsFromAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesRegulatoryAssetsAndLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesScheduleOfIntangibleAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionAndSignificantAccountingPoliciesSegmentReportingDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessDescriptionTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationCapitalExpendituresAndAssetAcquisitionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationCorporateExpenseReallocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_27459a92-428a-e415-bdb1-176ed2662e11" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_InvestmentIncomeInterest_27459a92-428a-e415-bdb1-176ed2662e11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_250c3b2f-7db5-7088-68cc-1dd831a2c2d7" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_250c3b2f-7db5-7088-68cc-1dd831a2c2d7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationInformationRelatingToSegmentsStatementOfIncomeDetailsCalc2" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationPropertyPlantAndEquipmentDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationSegmentAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/BusinessSegmentInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesEnvironmentalContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesFuturePurchaseAgreementRelatedPartyDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesLongTermPurchaseCommitmentDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesPowerSalesAgreementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesReimbursementAgreementDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesRelatedPartyLeaseDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/CommitmentsAndContingenciesUnconditionalPurchaseObligationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestCostsIncurred" xlink:label="loc_us-gaap_InterestCostsIncurred_a3ecd02e-94ff-3d52-85d7-ca23d88313c0" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_InterestCostsIncurred_a3ecd02e-94ff-3d52-85d7-ca23d88313c0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_ff017a48-8743-bfac-8af0-ca31401cb6de" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_SalesRevenueNet_ff017a48-8743-bfac-8af0-ca31401cb6de" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_FuelPurchasedPowerAndCostOfGasSold" xlink:label="loc_bkh_FuelPurchasedPowerAndCostOfGasSold_99f4eda1-2f99-a01f-21f2-8755345febff" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_bkh_FuelPurchasedPowerAndCostOfGasSold_99f4eda1-2f99-a01f-21f2-8755345febff" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ComprehensiveIncomeLossTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_07da1db4-2708-4446-4250-1fdd5956185e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_07da1db4-2708-4446-4250-1fdd5956185e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_742238c6-99b5-ec8f-811f-240c929f1974" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_742238c6-99b5-ec8f-811f-240c929f1974" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_dd7775cd-f4ab-5607-9b31-1ee98f605818" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_dd7775cd-f4ab-5607-9b31-1ee98f605818" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_InventoryNet_7eab44cf-1ea1-ca2a-420f-21f7b5343fc3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeAssetsCurrent" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_84c72a40-7d41-ae62-5328-afed8a5c4ed6" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_84c72a40-7d41-ae62-5328-afed8a5c4ed6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryAssetsCurrent" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_daa06a81-b926-da9a-fbbf-8528d98637b7" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_daa06a81-b926-da9a-fbbf-8528d98637b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_1cb4a384-e314-2300-ad55-c1ed289c8f7a" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_OtherAssetsCurrent_1cb4a384-e314-2300-ad55-c1ed289c8f7a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_7ccd4058-c821-b334-f2ba-45d4b5754cc1" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_8a47066b-3628-88d1-49db-ed09aecc7fc7" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_7ccd4058-c821-b334-f2ba-45d4b5754cc1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="loc_us-gaap_LongTermInvestments_c62504ca-c588-7676-b66d-68002db39ddb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_LongTermInvestments_c62504ca-c588-7676-b66d-68002db39ddb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_fe5a8e8b-5934-3dc5-9dae-7d40983185cf" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_fe5a8e8b-5934-3dc5-9dae-7d40983185cf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5551841b-83e0-4644-fca8-d4027d932c0a" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5551841b-83e0-4644-fca8-d4027d932c0a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_93a64cae-271a-5e6b-8c83-5adf9f941142" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_Goodwill_93a64cae-271a-5e6b-8c83-5adf9f941142" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_1fe06082-076b-052d-6e2e-930afe9d6b2d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_1fe06082-076b-052d-6e2e-930afe9d6b2d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeAssetsNoncurrent" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_16051231-04bd-ea94-b23d-97f0ca04a36d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_16051231-04bd-ea94-b23d-97f0ca04a36d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryAssetsNoncurrent" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_5f59bb76-086c-b40c-c9d5-6de36890630c" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_5f59bb76-086c-b40c-c9d5-6de36890630c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_9b27fab9-d497-627b-4cfb-6b585220b978" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_9b27fab9-d497-627b-4cfb-6b585220b978" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_63a47f61-ea22-3fe1-a926-4ed4e1977e98" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_6830efce-fe76-a964-a633-9a0eef13d086" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent_63a47f61-ea22-3fe1-a926-4ed4e1977e98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_7a72b51a-735c-1ad4-bd3f-d9bcf2d6a26d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_AccountsPayableCurrent_7a72b51a-735c-1ad4-bd3f-d9bcf2d6a26d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_3fe8f96b-142b-97b1-3b39-b8d22cd10e98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_02b1756e-a27a-df0b-cb87-4e42d7ab59c6" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_02b1756e-a27a-df0b-cb87-4e42d7ab59c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_bd3a7ae4-0e62-b7df-2312-729d1644863d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_bd3a7ae4-0e62-b7df-2312-729d1644863d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryLiabilityCurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_4aca1554-73cb-0edc-0b8c-fd23543ae37d" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_4aca1554-73cb-0edc-0b8c-fd23543ae37d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_c4493b41-4418-ed41-2f06-05ff9c61369f" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_ShortTermBorrowings_c4493b41-4418-ed41-2f06-05ff9c61369f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_f61bf97e-c3a5-ba72-7591-eba8e7bb6a44" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_LongTermDebtCurrent_f61bf97e-c3a5-ba72-7591-eba8e7bb6a44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_05b9c2a4-6f85-5413-8af9-df620dfd1b1e" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_f5e246cf-e80f-d00b-c8ed-4796aa2df4b4" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_05b9c2a4-6f85-5413-8af9-df620dfd1b1e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_822b66ff-44a1-e66b-5e0c-09356970a23d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_822b66ff-44a1-e66b-5e0c-09356970a23d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_314eb579-3ee1-408c-39f2-e62f2f37befc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_314eb579-3ee1-408c-39f2-e62f2f37befc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegulatoryLiabilityNoncurrent" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_630ce5df-98d8-d515-0f5c-663a0889bd56" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_630ce5df-98d8-d515-0f5c-663a0889bd56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9a02138f-e52f-25fa-014e-0405ac9ddb27" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_9a02138f-e52f-25fa-014e-0405ac9ddb27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_f234998c-5e05-09d0-d53e-5c44423c97c0" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_f234998c-5e05-09d0-d53e-5c44423c97c0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_a4dfe063-f815-c20a-13ad-828f72cb97e5" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_ce6ab6ce-f8d5-dad6-a84c-2c96c7d59f75" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent_a4dfe063-f815-c20a-13ad-828f72cb97e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_058e01e4-b9a1-623e-29f5-1b5c79bf095a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_CommitmentsAndContingencies_058e01e4-b9a1-623e-29f5-1b5c79bf095a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityOtherCarryingAmount" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityOtherCarryingAmount_ccbab92b-b2c3-85be-8295-6769dceee439" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityOtherCarryingAmount_ccbab92b-b2c3-85be-8295-6769dceee439" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_00443492-92dd-7fc1-13b6-792f3e163e73" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_00443492-92dd-7fc1-13b6-792f3e163e73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_00443492-92dd-7fc1-13b6-792f3e163e73" xlink:to="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_c3f7606a-e7e9-61d5-b60b-b4b059f68b26" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_CommonStockValue_c3f7606a-e7e9-61d5-b60b-b4b059f68b26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_2d1b9d27-8b19-82d9-2843-5b3d292b7fbb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_AdditionalPaidInCapital_2d1b9d27-8b19-82d9-2843-5b3d292b7fbb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_065cb284-7fca-cc9b-5752-2feaf74d0011" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_065cb284-7fca-cc9b-5752-2feaf74d0011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_40678492-c421-af67-b276-f663f9ff2f98" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_TreasuryStockValue_40678492-c421-af67-b276-f663f9ff2f98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_04f0961a-a0bc-88cf-6658-3f950da4a458" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_04f0961a-a0bc-88cf-6658-3f950da4a458" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncontrollingInterestInVariableInterestEntity" xlink:label="loc_us-gaap_NoncontrollingInterestInVariableInterestEntity_e9c94951-d1dd-e0a4-6afc-334bd9b59d69" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_00443492-92dd-7fc1-13b6-792f3e163e73" xlink:to="loc_us-gaap_NoncontrollingInterestInVariableInterestEntity_e9c94951-d1dd-e0a4-6afc-334bd9b59d69" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_dd2e9db6-10f9-d78a-ba84-b18268245a83" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_dd2e9db6-10f9-d78a-ba84-b18268245a83" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:type="arc" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_37b0c31d-5d8b-0577-dfd9-aa56a79334e3" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_37b0c31d-5d8b-0577-dfd9-aa56a79334e3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_e9a2cdf1-6f49-806b-7b55-b9320bcfa87f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_e9a2cdf1-6f49-806b-7b55-b9320bcfa87f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_e3eecf87-b290-4567-8a59-5b0a8e27c85b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_ShareBasedCompensation_e3eecf87-b290-4567-8a59-5b0a8e27c85b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_d9e1def3-d97c-55fc-940b-0ddf61dd2c8f" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_d9e1def3-d97c-55fc-940b-0ddf61dd2c8f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_371a4d3e-148a-313f-f556-b3ca6797139e" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_371a4d3e-148a-313f-f556-b3ca6797139e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_bf3f9720-ba63-7ecd-52ae-e754a6f349db" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_bf3f9720-ba63-7ecd-52ae-e754a6f349db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets_3b437768-d08d-9ded-c9dd-4fe5d040190e" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets_3b437768-d08d-9ded-c9dd-4fe5d040190e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_b9e0ec12-30d0-d99a-9ccb-012485c818e0" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_b9e0ec12-30d0-d99a-9ccb-012485c818e0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherRegulatoryAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherRegulatoryAssets_fe68af9d-21c8-6c2f-88b4-5b204d736b24" xlink:type="locator" />
    <link:calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherRegulatoryAssets_fe68af9d-21c8-6c2f-88b4-5b204d736b24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInRegulatoryLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInRegulatoryLiabilities_0c82baa8-7fbd-f40e-3958-1a1f8933209b" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInRegulatoryLiabilities_0c82baa8-7fbd-f40e-3958-1a1f8933209b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionContributions" xlink:label="loc_us-gaap_PensionContributions_57dea8b4-3b05-7315-420d-a5a834193ab7" xlink:type="locator" />
    <link:calculationArc order="13" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_PensionContributions_57dea8b4-3b05-7315-420d-a5a834193ab7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_f49e04d5-54a1-b629-a4e9-8ef51e0b0d6d" xlink:type="locator" />
    <link:calculationArc order="14" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_f49e04d5-54a1-b629-a4e9-8ef51e0b0d6d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_962cfc51-230d-a221-126b-1d12af7a5921" xlink:type="locator" />
    <link:calculationArc order="15" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_9ead1b94-5c78-ce9f-379f-74649d16d2bc" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_962cfc51-230d-a221-126b-1d12af7a5921" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_41d34a64-5135-57ad-661a-9f86a4fee4f7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_41d34a64-5135-57ad-661a-9f86a4fee4f7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_dd2e9db6-10f9-d78a-ba84-b18268245a83" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_2be04cf9-8ceb-0f9e-f8fc-88519ffff574" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_2be04cf9-8ceb-0f9e-f8fc-88519ffff574" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_fee12b15-6b42-6245-2e2f-ff030b98332c" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_2be04cf9-8ceb-0f9e-f8fc-88519ffff574" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_fee12b15-6b42-6245-2e2f-ff030b98332c" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired" xlink:label="loc_bkh_BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired_59fb5cad-1ad4-3433-8c27-875533162f3f" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_2be04cf9-8ceb-0f9e-f8fc-88519ffff574" xlink:to="loc_bkh_BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired_59fb5cad-1ad4-3433-8c27-875533162f3f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_5eaab9ea-3795-2871-0d80-72b9662e37e6" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_2be04cf9-8ceb-0f9e-f8fc-88519ffff574" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_5eaab9ea-3795-2871-0d80-72b9662e37e6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_c2c196d6-13d0-2f1a-74ee-f582ca75b52c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_c2c196d6-13d0-2f1a-74ee-f582ca75b52c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_dd2e9db6-10f9-d78a-ba84-b18268245a83" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_11043fe8-215b-8e23-9bde-984dc82a0339" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_PaymentsOfDividends_11043fe8-215b-8e23-9bde-984dc82a0339" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_dbbd5d91-eb58-fa81-2753-d9ddf4ada4c1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_dbbd5d91-eb58-fa81-2753-d9ddf4ada4c1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_27f3e695-baed-1adc-cc35-793c3b76e4f9" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_27f3e695-baed-1adc-cc35-793c3b76e4f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_e5f1c7a4-b42a-8461-2001-b1f20e51b257" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_e5f1c7a4-b42a-8461-2001-b1f20e51b257" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_2b72fe5f-3c0e-d5e0-8e5c-ad01818e58e5" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_2b72fe5f-3c0e-d5e0-8e5c-ad01818e58e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMinorityShareholders" xlink:label="loc_us-gaap_ProceedsFromMinorityShareholders_6a660996-9291-b132-478c-dc07edd8fb2c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromMinorityShareholders_6a660996-9291-b132-478c-dc07edd8fb2c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToMinorityShareholders" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_f5111bee-d5f6-1852-97c9-8d4d4881d906" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_f5111bee-d5f6-1852-97c9-8d4d4881d906" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfInterestInCorporateUnit" xlink:label="loc_us-gaap_ProceedsFromSaleOfInterestInCorporateUnit_96164e7f-0793-42a4-2e23-db4dfb10383b" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromSaleOfInterestInCorporateUnit_96164e7f-0793-42a4-2e23-db4dfb10383b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_9c4e2a5c-e841-39a2-fcf8-f80cfa44af11" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_9c4e2a5c-e841-39a2-fcf8-f80cfa44af11" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_dd69e307-3cf6-284a-5315-8fa7ac464283" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_dd69e307-3cf6-284a-5315-8fa7ac464283" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_dd69e307-3cf6-284a-5315-8fa7ac464283" xlink:to="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_dd69e307-3cf6-284a-5315-8fa7ac464283" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_a7b5d22e-96eb-ace2-25a7-90129fb72d8e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_a7b5d22e-96eb-ace2-25a7-90129fb72d8e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax_f7fe1940-c9a0-7b9b-5dd9-62504fd41a69" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax_f7fe1940-c9a0-7b9b-5dd9-62504fd41a69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_eea0c679-aff6-c974-47a0-ff7e9cae6086" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_eea0c679-aff6-c974-47a0-ff7e9cae6086" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_53315161-4e62-73b0-239f-6aa2cd9fa6b7" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_53315161-4e62-73b0-239f-6aa2cd9fa6b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_aa99f772-8337-cbc2-0b89-25fbb3108271" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax_aa99f772-8337-cbc2-0b89-25fbb3108271" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfComprehensiveIncomeLossParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ConsolidatedStatementsOfIncomeLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_fe6ff5e7-33ad-d0eb-3545-2854577c8d1d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e4763c0c-8fb9-af76-cf2b-4d5847742ea9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_fe6ff5e7-33ad-d0eb-3545-2854577c8d1d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_e4763c0c-8fb9-af76-cf2b-4d5847742ea9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_240a9501-620c-ed63-04a8-c8905e2cf3d1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_fe6ff5e7-33ad-d0eb-3545-2854577c8d1d" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_240a9501-620c-ed63-04a8-c8905e2cf3d1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_29cb4575-1df0-23a0-aea0-70de299da05c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_29cb4575-1df0-23a0-aea0-70de299da05c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_220f7108-2ee6-8535-1bca-b062759c7beb" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_f309c50c-2dc0-f2fb-e4a2-9d61bc04812a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_220f7108-2ee6-8535-1bca-b062759c7beb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_f309c50c-2dc0-f2fb-e4a2-9d61bc04812a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_35443bfe-146b-7ba7-b1f8-4daa6ea7427c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_220f7108-2ee6-8535-1bca-b062759c7beb" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_35443bfe-146b-7ba7-b1f8-4daa6ea7427c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:to="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_FuelPurchasedPowerAndCostOfGasSold" xlink:label="loc_bkh_FuelPurchasedPowerAndCostOfGasSold_99f4eda1-2f99-a01f-21f2-8755345febff" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:to="loc_bkh_FuelPurchasedPowerAndCostOfGasSold_99f4eda1-2f99-a01f-21f2-8755345febff" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_OperatingExpenseMaintenanceOperationsandOtherCostsandExpense" xlink:label="loc_bkh_OperatingExpenseMaintenanceOperationsandOtherCostsandExpense_8e286cdc-d251-c5cf-2b04-8755361da98e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:to="loc_bkh_OperatingExpenseMaintenanceOperationsandOtherCostsandExpense_8e286cdc-d251-c5cf-2b04-8755361da98e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_37b0c31d-5d8b-0577-dfd9-aa56a79334e3" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_37b0c31d-5d8b-0577-dfd9-aa56a79334e3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_655fde20-fa06-9a02-51f4-9144757a03c5" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_655fde20-fa06-9a02-51f4-9144757a03c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_b0184ecc-12ea-c485-85c0-5fa141798e88" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_23a4428c-a5e3-3b9c-fc88-04ae5be27ab3" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_b0184ecc-12ea-c485-85c0-5fa141798e88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_ff017a48-8743-bfac-8af0-ca31401cb6de" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_9894e895-7695-402a-9f03-08d60b7373b8" xlink:to="loc_us-gaap_SalesRevenueNet_ff017a48-8743-bfac-8af0-ca31401cb6de" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_TotalOtherIncomeExpense" xlink:label="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestCostsIncurred" xlink:label="loc_us-gaap_InterestCostsIncurred_a3ecd02e-94ff-3d52-85d7-ca23d88313c0" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_us-gaap_InterestCostsIncurred_a3ecd02e-94ff-3d52-85d7-ca23d88313c0" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized" xlink:label="loc_bkh_PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized_da50e387-997e-9d0d-6be3-8755385672a6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_bkh_PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized_da50e387-997e-9d0d-6be3-8755385672a6" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_CapitalizedInterest" xlink:label="loc_bkh_CapitalizedInterest_00c89c76-610f-ab5c-a0ab-875538c5f7ed" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_bkh_CapitalizedInterest_00c89c76-610f-ab5c-a0ab-875538c5f7ed" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_27459a92-428a-e415-bdb1-176ed2662e11" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_us-gaap_InvestmentIncomeInterest_27459a92-428a-e415-bdb1-176ed2662e11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_d76ee53d-fca3-451c-17df-ca20d4659c3a" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_d76ee53d-fca3-451c-17df-ca20d4659c3a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_c4282c60-5906-e6d6-ad15-55cf7a8c6ef0" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_us-gaap_OtherNonoperatingExpense_c4282c60-5906-e6d6-ad15-55cf7a8c6ef0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncome" xlink:label="loc_us-gaap_OtherNonoperatingIncome_1ede1b11-d484-0aa6-f6c9-5730d5557607" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_TotalOtherIncomeExpense_007ccd85-ec34-f7e6-1455-8755390ca866" xlink:to="loc_us-gaap_OtherNonoperatingIncome_1ede1b11-d484-0aa6-f6c9-5730d5557607" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_adacf05e-7e15-bd60-3e53-87432885dc29" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DiscontinuedOperations" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DiscontinuedOperationsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_c095036e-19fc-eccd-4b1f-e7ecaae34dfa" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_c095036e-19fc-eccd-4b1f-e7ecaae34dfa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_baf1e750-e749-4289-93f6-efc39cd01e57" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_c095036e-19fc-eccd-4b1f-e7ecaae34dfa" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_baf1e750-e749-4289-93f6-efc39cd01e57" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses_8f817097-b709-5af0-a9ec-8755396339f6" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss_c095036e-19fc-eccd-4b1f-e7ecaae34dfa" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses_8f817097-b709-5af0-a9ec-8755396339f6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_1fb7f781-585c-8941-0d30-a55046e8b7fe" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses_8f817097-b709-5af0-a9ec-8755396339f6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_1fb7f781-585c-8941-0d30-a55046e8b7fe" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_5f8e6670-ba69-7f41-74f4-24064f97ceb5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses_8f817097-b709-5af0-a9ec-8755396339f6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_5f8e6670-ba69-7f41-74f4-24064f97ceb5" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofLonglivedAssets" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofLonglivedAssets_cd31d6af-51ec-a809-404c-875536dc0281" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsTotalOperatingExpenses_8f817097-b709-5af0-a9ec-8755396339f6" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofLonglivedAssets_cd31d6af-51ec-a809-404c-875536dc0281" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeExpenseNet" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeExpenseNet_ab0a7e91-c1ca-a552-1656-875539034630" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeExpenseNet_ab0a7e91-c1ca-a552-1656-875539034630" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsOtherIncomeExpensenet" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsOtherIncomeExpensenet_636471fc-c18b-2e9c-4651-8755376a671f" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsOtherIncomeExpensenet_636471fc-c18b-2e9c-4651-8755376a671f" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofEquityInvestments" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofEquityInvestments_542cfbaf-e7d8-d664-c0f6-87553709be03" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsImpairmentofEquityInvestments_542cfbaf-e7d8-d664-c0f6-87553709be03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_64dfb8a3-e793-00fc-3cb3-ad8751b1d684" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_64dfb8a3-e793-00fc-3cb3-ad8751b1d684" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_f47c0079-0d2e-4976-9fc3-b4aea1e37feb" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_f47c0079-0d2e-4976-9fc3-b4aea1e37feb" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationDerivativeAssetsCurrentandNoncurrent" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationDerivativeAssetsCurrentandNoncurrent_0a69a2b5-3445-96ce-9fe7-8755399bab25" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationDerivativeAssetsCurrentandNoncurrent_0a69a2b5-3445-96ce-9fe7-8755399bab25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssetsNoncurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssetsNoncurrent_f6f90969-0291-cc70-03d0-867dace7a8cd" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDeferredTaxAssetsNoncurrent_f6f90969-0291-cc70-03d0-867dace7a8cd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment_b6cbbfc8-a3d2-dc76-644f-bd1802494dcc" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment_b6cbbfc8-a3d2-dc76-644f-bd1802494dcc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherLiabilities" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherLiabilities_61deb209-c0a1-4935-e618-fab464829c1b" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherLiabilities_61deb209-c0a1-4935-e618-fab464829c1b" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DisposalGroupIncludingDiscontinuedOperationsDerivativeLiabilitiesCurrentandNoncurrent" xlink:label="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsDerivativeLiabilitiesCurrentandNoncurrent_45b1a5d8-a154-3ac7-d903-87553809b5ef" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_bkh_DisposalGroupIncludingDiscontinuedOperationsDerivativeLiabilitiesCurrentandNoncurrent_45b1a5d8-a154-3ac7-d903-87553809b5ef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities_dd0f457c-3cd3-e61e-cd82-b85cdf8d70e8" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_fbfc68a4-7e65-a720-f5aa-5f1609a206d5" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherNoncurrentLiabilities_dd0f457c-3cd3-e61e-cd82-b85cdf8d70e8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DiscontinuedOperationsEquityInvestmentsInUnconsolidatedSubsidiariesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DiscontinuedOperationsImpairmentOfLongLivedAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DiscontinuedOperationsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/DocumentAndEntityInformationDocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlans" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAccumulatedBenefitObligationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear_9111f6f3-4855-ea28-f278-35a0d5402e45" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7187b075-0880-047c-9c53-a921fdca9445" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear_9111f6f3-4855-ea28-f278-35a0d5402e45" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7187b075-0880-047c-9c53-a921fdca9445" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear_c12eb120-b859-95da-c718-05ad4f74ac34" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear_9111f6f3-4855-ea28-f278-35a0d5402e45" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear_c12eb120-b859-95da-c718-05ad4f74ac34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_ac65944e-d0a3-7081-a0ad-366dc25783e8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax_416e790e-c835-9796-e8b3-e06c9ff5d530" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_ac65944e-d0a3-7081-a0ad-366dc25783e8" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax_416e790e-c835-9796-e8b3-e06c9ff5d530" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax_578a7f9f-b1f2-0512-a679-4397bbeeb1cc" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_ac65944e-d0a3-7081-a0ad-366dc25783e8" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax_578a7f9f-b1f2-0512-a679-4397bbeeb1cc" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTaxCutsandJobsActof2017ReclassificationfromAOCItoRetainedEarnings" xlink:label="loc_bkh_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTaxCutsandJobsActof2017ReclassificationfromAOCItoRetainedEarnings_822907E361BA53E7D057BA03A64B0EB7" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_ac65944e-d0a3-7081-a0ad-366dc25783e8" xlink:to="loc_bkh_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTaxCutsandJobsActof2017ReclassificationfromAOCItoRetainedEarnings_822907E361BA53E7D057BA03A64B0EB7" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansAmountsRecognizedInConsolidatedBalanceSheetDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansChangesInBenefitObligationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansChangesInPlanAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansComponentsOfNetPeriodicExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_89ad3af5-a7a9-a0b6-3ed0-1824210c7a90" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_89ad3af5-a7a9-a0b6-3ed0-1824210c7a90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_50406d00-3746-2e05-3a50-4b2bf529ff14" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_50406d00-3746-2e05-3a50-4b2bf529ff14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_053c4475-6836-cf00-1abe-b15f58110eab" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_053c4475-6836-cf00-1abe-b15f58110eab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_ab621a8a-0d01-618c-dbe1-c25fa3bace61" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_ab621a8a-0d01-618c-dbe1-c25fa3bace61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_b2e93b1c-a313-bd95-39dd-1f9d9938b2e9" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_b2e93b1c-a313-bd95-39dd-1f9d9938b2e9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_5792b75a-aa7a-5602-9db9-cb0918c99b87" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_bae25320-9d69-b27b-4684-0b60368d617f" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_5792b75a-aa7a-5602-9db9-cb0918c99b87" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansDefinedBenefitPlansAssumptionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansEmployeeBenefitPlansFairValueMeasurementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansPlanContributionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansProjectedBenefitPlanPaymentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EmployeeBenefitPlansTargetPlanAssetsAllocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/Equity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityAtTheMarketEquityOfferingProgramDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityCommonStockOfferingDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityDividendReinvestmentAndStockPurchasePlanDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityEquityCompensationPlansDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityNoncontrollingInterestInSubsidiaryDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityPerformanceSharePlanDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityPreferredStockDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityRestrictedStockDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityStockOptionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/EquityUnitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueMeasurementsBalanceSheetLocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueMeasurementsBalanceSheetOffsettingDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_a3ccd28b-d904-f2d6-d218-02006f748e50" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_5296452d-3ce9-bd2f-2a62-9643805fc6ab" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilities_a3ccd28b-d904-f2d6-d218-02006f748e50" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_5296452d-3ce9-bd2f-2a62-9643805fc6ab" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_GrossAmountsOffsetInStatementOfFinancialPositionLiabilities" xlink:label="loc_bkh_GrossAmountsOffsetInStatementOfFinancialPositionLiabilities_8afcb4b5-345c-f7f0-3efd-875534b8f349" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilities_a3ccd28b-d904-f2d6-d218-02006f748e50" xlink:to="loc_bkh_GrossAmountsOffsetInStatementOfFinancialPositionLiabilities_8afcb4b5-345c-f7f0-3efd-875534b8f349" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_990d24f7-bf09-089d-4b5d-4490e079db44" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_62eb8c59-8348-bd48-683f-a9f1d164ff20" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_990d24f7-bf09-089d-4b5d-4490e079db44" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_62eb8c59-8348-bd48-683f-a9f1d164ff20" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_GrossAmountsOffsetInStatementOfFinancialPositionAssets" xlink:label="loc_bkh_GrossAmountsOffsetInStatementOfFinancialPositionAssets_ca0cffa5-76a4-0475-7615-8755333585da" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_990d24f7-bf09-089d-4b5d-4490e079db44" xlink:to="loc_bkh_GrossAmountsOffsetInStatementOfFinancialPositionAssets_ca0cffa5-76a4-0475-7615-8755333585da" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueOfFinancialInstruments" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueOfFinancialInstrumentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/Guarantees" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/GuaranteesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/GuaranteesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesCarryforwardsStateAndForeignTaxCreditsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesCurrentAndDeferredIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_15bb8413-7c16-05ff-0f24-330007bd87a4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_15bb8413-7c16-05ff-0f24-330007bd87a4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_40691c72-4a6d-af64-c37e-f5abe38c6165" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_40691c72-4a6d-af64-c37e-f5abe38c6165" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_InvestmentTaxCreditAmortization" xlink:label="loc_bkh_InvestmentTaxCreditAmortization_63b3f048-0d61-3966-564b-8755388ab292" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:to="loc_bkh_InvestmentTaxCreditAmortization_63b3f048-0d61-3966-564b-8755388ab292" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_36ba223a-0466-98b6-2d31-f243492419f9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_36ba223a-0466-98b6-2d31-f243492419f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_10028fc1-eee3-03f5-6f20-ff5d85e3c0b2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_10028fc1-eee3-03f5-6f20-ff5d85e3c0b2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesDeferredIncomeTaxAssetsAndLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_644ceb1c-07ef-6a89-f014-9d7b5dfbc918" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_644ceb1c-07ef-6a89-f014-9d7b5dfbc918" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities_bf244be3-23f1-08bb-4e16-8db9ea8f5346" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:to="loc_us-gaap_DeferredTaxAssetsRegulatoryAssetsAndLiabilities_bf244be3-23f1-08bb-4e16-8db9ea8f5346" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_abd291fc-e1d7-7f11-bf97-282dd971e314" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_abd291fc-e1d7-7f11-bf97-282dd971e314" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3541201a-a025-b00d-aec1-2cb167bdef44" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3541201a-a025-b00d-aec1-2cb167bdef44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_91623f44-5f42-408a-f7b7-7a4698afab83" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_91623f44-5f42-408a-f7b7-7a4698afab83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_46929883-d93f-69b0-5ded-4c800feeb57f" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_d74724c2-178d-7f3f-8e86-5f5ba690672c" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_46929883-d93f-69b0-5ded-4c800feeb57f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_644ceb1c-07ef-6a89-f014-9d7b5dfbc918" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_dde5eeca-2b71-60e2-a05c-fb2f2f5703af" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_dde5eeca-2b71-60e2-a05c-fb2f2f5703af" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesRegulatoryAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_8741bb8e-9644-bebf-1dea-88e8df7df227" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesRegulatoryAssets_8741bb8e-9644-bebf-1dea-88e8df7df227" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill_c6e3fbc6-df71-240b-9ad9-ad354cbc072c" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill_c6e3fbc6-df71-240b-9ad9-ad354cbc072c" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_DeferredTaxLiabilityState" xlink:label="loc_bkh_DeferredTaxLiabilityState_746f331f-5efe-177f-b4a2-875539409494" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_bkh_DeferredTaxLiabilityState_746f331f-5efe-177f-b4a2-875539409494" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpense" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_f732a6b0-c55e-6b42-bfcb-97ad34bd4389" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_f732a6b0-c55e-6b42-bfcb-97ad34bd4389" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_40c7d4a7-f1a1-0c55-497e-f9a3bb09604c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_40c7d4a7-f1a1-0c55-497e-f9a3bb09604c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesEffectiveTaxRateDifferencesFromStatutoryTaxRatesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_29919d14-72a3-6197-982a-3a6269f21038" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_29919d14-72a3-6197-982a-3a6269f21038" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c48cf597-7f94-3186-bb2a-448703ee500e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c48cf597-7f94-3186-bb2a-448703ee500e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion_fef4d5bb-6a5f-08b6-3364-fd4c3ed81a63" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion_fef4d5bb-6a5f-08b6-3364-fd4c3ed81a63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_1d0c40ee-1b12-73fb-d3f5-45b12e0439bd" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_1d0c40ee-1b12-73fb-d3f5-45b12e0439bd" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_EffectiveIncomeTaxRateReconciliationAllowanceForOtherFundsUsedDuringConstructionEquity" xlink:label="loc_bkh_EffectiveIncomeTaxRateReconciliationAllowanceForOtherFundsUsedDuringConstructionEquity_6af90e82-ff2f-296e-997f-87553327837c" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_bkh_EffectiveIncomeTaxRateReconciliationAllowanceForOtherFundsUsedDuringConstructionEquity_6af90e82-ff2f-296e-997f-87553327837c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_bd3fb4a2-dba4-9f41-2b9f-30441850eb67" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_bd3fb4a2-dba4-9f41-2b9f-30441850eb67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_a4caa1ae-f0c6-afaa-9200-a4405b1c7563" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_a4caa1ae-f0c6-afaa-9200-a4405b1c7563" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_037ad0c3-244c-bbfe-1920-60110d2959b9" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_037ad0c3-244c-bbfe-1920-60110d2959b9" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_EffectiveIncomeTaxRateReconciliationFlowThroughAccounting" xlink:label="loc_bkh_EffectiveIncomeTaxRateReconciliationFlowThroughAccounting_4733aae9-7e04-0430-61c0-875538fce26d" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_bkh_EffectiveIncomeTaxRateReconciliationFlowThroughAccounting_4733aae9-7e04-0430-61c0-875538fce26d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_e076fca2-751d-53ee-27b4-64a5b6f5b217" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_e076fca2-751d-53ee-27b4-64a5b6f5b217" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_EffectiveIncomeTaxReconciliationNetOperatingLossCarryback" xlink:label="loc_bkh_EffectiveIncomeTaxReconciliationNetOperatingLossCarryback_63F8ABF9FADF5DE7FC669652B022FE5A" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_bkh_EffectiveIncomeTaxReconciliationNetOperatingLossCarryback_63F8ABF9FADF5DE7FC669652B022FE5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_8718aa1e-c40a-73dd-11d3-b6a4475e0d37" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_8718aa1e-c40a-73dd-11d3-b6a4475e0d37" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesInterestPenaltiesAndAuditsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesNetOperatingLossCarryforwardsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/IncomeTaxesTaxCutAndJobsActDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/JointlyOwnedFacilities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/JointlyOwnedFacilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/JointlyOwnedFacilitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebt" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtAggregateMaturitiesOfLongTermDebtDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtAssumptionOfLongTermDebtDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtDebtTransactionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtDeferredFinancingCostsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtDividendRestrictionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/LongTermDebtTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/NotesPayable" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/NotesPayableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/NotesPayableTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasExplorationAndProductionIndustriesDisclosureTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedCapitalizedCostsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet" xlink:label="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_8fa9fdd6-b3c8-21a3-d0be-c78b1bf8fdeb" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross" xlink:label="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross_cfa89e53-2fd4-8f72-ebd3-5b7b1d6c6363" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_8fa9fdd6-b3c8-21a3-d0be-c78b1bf8fdeb" xlink:to="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross_cfa89e53-2fd4-8f72-ebd3-5b7b1d6c6363" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsUnprovedProperties" xlink:label="loc_us-gaap_CapitalizedCostsUnprovedProperties_247320d7-2769-036a-40a9-c5eb54ac44d6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross_cfa89e53-2fd4-8f72-ebd3-5b7b1d6c6363" xlink:to="loc_us-gaap_CapitalizedCostsUnprovedProperties_247320d7-2769-036a-40a9-c5eb54ac44d6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsProvedProperties" xlink:label="loc_us-gaap_CapitalizedCostsProvedProperties_688f8924-70c7-8e29-896a-a042a158a3e5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesGross_cfa89e53-2fd4-8f72-ebd3-5b7b1d6c6363" xlink:to="loc_us-gaap_CapitalizedCostsProvedProperties_688f8924-70c7-8e29-896a-a042a158a3e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities" xlink:label="loc_us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities_0d2e35ca-a6b8-780c-dff2-e9535aed52dd" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet_8fa9fdd6-b3c8-21a3-d0be-c78b1bf8fdeb" xlink:to="loc_us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities_0d2e35ca-a6b8-780c-dff2-e9535aed52dd" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedChangeInStandardMeasureOfDiscountedFutureCashNetFlowsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedCostsIncurredOilAndGasDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities" xlink:label="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_1f2bd9cf-dd4c-891a-a809-1cfb4cc98ce9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves_1f2bd9cf-dd4c-891a-a809-1cfb4cc98ce9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties" xlink:label="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_374908be-c154-544d-fb7e-520aad4d92b9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:to="loc_us-gaap_CostsIncurredAcquisitionOfUnprovedOilAndGasProperties_374908be-c154-544d-fb7e-520aad4d92b9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredExplorationCosts" xlink:label="loc_us-gaap_CostsIncurredExplorationCosts_ac5ee2ab-0d02-53ec-4e55-6f02bacb1556" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:to="loc_us-gaap_CostsIncurredExplorationCosts_ac5ee2ab-0d02-53ec-4e55-6f02bacb1556" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredDevelopmentCosts" xlink:label="loc_us-gaap_CostsIncurredDevelopmentCosts_964710b7-96f4-32de-0bd2-8c457ff4acd4" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:to="loc_us-gaap_CostsIncurredDevelopmentCosts_964710b7-96f4-32de-0bd2-8c457ff4acd4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsIncurredAssetRetirementObligationIncurred" xlink:label="loc_us-gaap_CostsIncurredAssetRetirementObligationIncurred_dcbd8c13-8707-17c2-a6b7-af5e7f400b00" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities_80a630d6-ed98-d376-9370-0970f4307899" xlink:to="loc_us-gaap_CostsIncurredAssetRetirementObligationIncurred_dcbd8c13-8707-17c2-a6b7-af5e7f400b00" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedProvedDevelopedAndUndevelopedOilAndGasReserveDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedResultsOfOperationsOilAndGasDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts" xlink:label="loc_us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts_a3294222-76c7-445f-2c2d-c4edf06cda09" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes" xlink:label="loc_us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes_e8776523-5fe9-5c86-e58b-e9b62e0e5042" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts_a3294222-76c7-445f-2c2d-c4edf06cda09" xlink:to="loc_us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes_e8776523-5fe9-5c86-e58b-e9b62e0e5042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities" xlink:label="loc_us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities_51029e9f-3e34-51b8-8355-02f349307f7b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes_e8776523-5fe9-5c86-e58b-e9b62e0e5042" xlink:to="loc_us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities_51029e9f-3e34-51b8-8355-02f349307f7b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities" xlink:label="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_cc10c75e-4afd-fa35-0477-d5848c21837a" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes_e8776523-5fe9-5c86-e58b-e9b62e0e5042" xlink:to="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_cc10c75e-4afd-fa35-0477-d5848c21837a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsProductionOrLiftingCosts" xlink:label="loc_us-gaap_ResultsOfOperationsProductionOrLiftingCosts_de0099ca-e2d3-ddd3-5dc0-9714f756b2c6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_cc10c75e-4afd-fa35-0477-d5848c21837a" xlink:to="loc_us-gaap_ResultsOfOperationsProductionOrLiftingCosts_de0099ca-e2d3-ddd3-5dc0-9714f756b2c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions" xlink:label="loc_us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions_a1bd0df7-da9d-a6d2-db2c-4f3da7773f7a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_cc10c75e-4afd-fa35-0477-d5848c21837a" xlink:to="loc_us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions_a1bd0df7-da9d-a6d2-db2c-4f3da7773f7a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties" xlink:label="loc_us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties_f1e20cd9-2d01-6d30-0d06-1797d331b174" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_cc10c75e-4afd-fa35-0477-d5848c21837a" xlink:to="loc_us-gaap_ResultsOfOperationsImpairmentOfOilAndGasProperties_f1e20cd9-2d01-6d30-0d06-1797d331b174" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResultsOfOperationsIncomeTaxExpense" xlink:label="loc_us-gaap_ResultsOfOperationsIncomeTaxExpense_b5f101e4-1af3-6e20-ce2f-cdb43c5b3594" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts_a3294222-76c7-445f-2c2d-c4edf06cda09" xlink:to="loc_us-gaap_ResultsOfOperationsIncomeTaxExpense_b5f101e4-1af3-6e20-ce2f-cdb43c5b3594" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedStandardMeasureOfDiscountedFutureNetCashFlowsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves" xlink:label="loc_us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves_68511d57-a2a4-acd9-3845-ac56a2fac2cb" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows" xlink:label="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows_4cf79c48-8b9f-5742-8fb9-17b106f91e5b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves_68511d57-a2a4-acd9-3845-ac56a2fac2cb" xlink:to="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows_4cf79c48-8b9f-5742-8fb9-17b106f91e5b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows" xlink:label="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows_0fc69be4-41b7-18df-9334-dfeaf063e151" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows_4cf79c48-8b9f-5742-8fb9-17b106f91e5b" xlink:to="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows_0fc69be4-41b7-18df-9334-dfeaf063e151" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts" xlink:label="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts_89113419-6f17-0b5d-5ce6-f0647f9a3d2c" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows_4cf79c48-8b9f-5742-8fb9-17b106f91e5b" xlink:to="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts_89113419-6f17-0b5d-5ce6-f0647f9a3d2c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts" xlink:label="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts_8b67e395-c58c-382e-5870-2adddad48f4b" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows_4cf79c48-8b9f-5742-8fb9-17b106f91e5b" xlink:to="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts_8b67e395-c58c-382e-5870-2adddad48f4b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows" xlink:label="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows_74423df5-722e-c6a3-1207-f8e724901e00" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves_68511d57-a2a4-acd9-3845-ac56a2fac2cb" xlink:to="loc_us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows_74423df5-722e-c6a3-1207-f8e724901e00" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OilAndGasReservesUnauditedUnprovedPropertiesExcludedFromAmortizationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization" xlink:label="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization_9088091a-0bf7-4eb2-d1e2-edfdb2a631ac" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AcquisitionCosts" xlink:label="loc_us-gaap_AcquisitionCosts_ca3ede63-15d8-b955-9407-295bc6d44e27" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization_9088091a-0bf7-4eb2-d1e2-edfdb2a631ac" xlink:to="loc_us-gaap_AcquisitionCosts_ca3ede63-15d8-b955-9407-295bc6d44e27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ExplorationCosts" xlink:label="loc_us-gaap_ExplorationCosts_a31135e0-3718-2735-7c0f-5354e8cd0760" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization_9088091a-0bf7-4eb2-d1e2-edfdb2a631ac" xlink:to="loc_us-gaap_ExplorationCosts_a31135e0-3718-2735-7c0f-5354e8cd0760" xlink:type="arc" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_CapitalizedInterestOfCostExcludedFromAmortization" xlink:label="loc_bkh_CapitalizedInterestOfCostExcludedFromAmortization_2269aa5a-e6d0-e31c-af7b-87553789f9e5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization_9088091a-0bf7-4eb2-d1e2-edfdb2a631ac" xlink:to="loc_bkh_CapitalizedInterestOfCostExcludedFromAmortization_2269aa5a-e6d0-e31c-af7b-87553789f9e5" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OperatingLeases" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OperatingLeasesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OperatingLeasesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OtherComprehensiveIncome" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/OtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/PropertyPlantAndEquipment" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentDetailsCalc2" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_ABF88D2F8C921C22E9C6A5A64DAA62EC_fe5a8e8b-5934-3dc5-9dae-7d40983185cf" xlink:type="locator" />
    <link:loc xlink:href="bkh-20171231.xsd#bkh_PropertyPlantEquipmentExcludingConstructionInProgress" xlink:label="loc_bkh_PropertyPlantEquipmentExcludingConstructionInProgress_ABF88D2F8C921C22E9C6A5A64DAA62EC_1b6bd719-d3d4-58b4-2bb4-875533b64ccd" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_ABF88D2F8C921C22E9C6A5A64DAA62EC_fe5a8e8b-5934-3dc5-9dae-7d40983185cf" xlink:to="loc_bkh_PropertyPlantEquipmentExcludingConstructionInProgress_ABF88D2F8C921C22E9C6A5A64DAA62EC_1b6bd719-d3d4-58b4-2bb4-875533b64ccd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_ABF88D2F8C921C22E9C6A5A64DAA62EC_594f8c62-c8c5-bd85-818c-71da6f0408d7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_ABF88D2F8C921C22E9C6A5A64DAA62EC_fe5a8e8b-5934-3dc5-9dae-7d40983185cf" xlink:to="loc_us-gaap_ConstructionInProgressGross_ABF88D2F8C921C22E9C6A5A64DAA62EC_594f8c62-c8c5-bd85-818c-71da6f0408d7" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/PropertyPlantAndEquipmentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnauditedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_33076493-4882-6413-5de3-7bb85b9df3b7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_b9914cca-4860-d701-8b49-ae2910ad372f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3d9b4bd2-957e-ddb5-7841-6a572de70646" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_baabbf0a-644b-708a-c310-1211f9af2775" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/QuarterlyHistoricalDataUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RegulatoryMattersElectricUtilitiesRateActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RegulatoryMattersGasUtilitiesRateActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RegulatoryMattersRegulatoryMattersNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesCashFlowHedgesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesDerivativesNotDesignatedAsHedgeInstrumentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesDiscontinuedOperationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesFinancingActivitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/RiskManagementActivitiesUtilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ScheduleIiConsolidatedValuationAndQualifyingAccounts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ScheduleIiConsolidatedValuationAndQualifyingAccountsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/ScheduleOfFairValuesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/SupplementalCashFlowInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/SupplementalCashFlowInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.blackhillscorp.com/role/SupplementalDisclosureOfCashFlowInformation" xlink:type="extended" />
</link:linkbase>
