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  <xsd:import namespace="http://fasb.org/us-gaap/2014-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd" />
  <xsd:element name="PercentageOfInvestorInterestReflectedInNoncontrollingInterest" id="mic_PercentageOfInvestorInterestReflectedInNoncontrollingInterest" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="InternationalMatexTankTerminalsMember" id="mic_InternationalMatexTankTerminalsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ExergyIdahoHoldingsMember" id="mic_ExergyIdahoHoldingsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="GalaxyAndBocaAviationAcquisitionsMember" id="mic_GalaxyAndBocaAviationAcquisitionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDividendsPaidToManagerRelatedPartyTableTextBlock" id="mic_ScheduleOfDividendsPaidToManagerRelatedPartyTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CommonStockSharesDividendReinvestmentPlanUnissued" id="mic_CommonStockSharesDividendReinvestmentPlanUnissued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="CommonStockVotesPerShare" id="mic_CommonStockVotesPerShare" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="CommonStockSharesDividendReinvestmentPlanAuthorized" id="mic_CommonStockSharesDividendReinvestmentPlanAuthorized" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="NumberOfMarineTerminals" id="mic_NumberOfMarineTerminals" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="NumberOfSharesHeldByManagerRelatedParty" id="mic_NumberOfSharesHeldByManagerRelatedParty" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="MacquarieInfrastructureManagementIncorporatedMember" id="mic_MacquarieInfrastructureManagementIncorporatedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfAirports" id="mic_NumberOfAirports" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="ExternalIndependentDirectorMember" id="mic_ExternalIndependentDirectorMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfWindPowerGenerationFacilities" id="mic_NumberOfWindPowerGenerationFacilities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="NumberOfSolarProjects" id="mic_NumberOfSolarProjects" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="SolarPowerGenerationBusinessesMember" id="mic_SolarPowerGenerationBusinessesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfOwnershipInterestsSold" id="mic_PercentageOfOwnershipInterestsSold" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="DefinedContributionPlanEmployerMatchingContribution" id="mic_DefinedContributionPlanEmployerMatchingContribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanMinimumServicePeriodForEligibleToParticipate" id="mic_DefinedContributionPlanMinimumServicePeriodForEligibleToParticipate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanMinimumAgeForEligibleToParticipate" id="mic_DefinedContributionPlanMinimumAgeForEligibleToParticipate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DistrictEnergyBusinessMember" id="mic_DistrictEnergyBusinessMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfDays" id="mic_NumberOfDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanEstimatedFutureEmployerContributionsContributionPeriod" id="mic_DefinedBenefitPlanEstimatedFutureEmployerContributionsContributionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanConsecutivePeriodBasedOnYearsOfServiceAndEmployeesHighestAverageCompensation" id="mic_DefinedContributionPlanConsecutivePeriodBasedOnYearsOfServiceAndEmployeesHighestAverageCompensation" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="GasProductionAndDistributionBusinessMember" id="mic_GasProductionAndDistributionBusinessMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="BaseManagementFeeToManagerRelatedPartySettledInShares" id="mic_BaseManagementFeeToManagerRelatedPartySettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeeToManagerRelatedPartySettledInShares" id="mic_PerformanceFeeToManagerRelatedPartySettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeeToManagerRelatedPartySettledInCash" id="mic_PerformanceFeeToManagerRelatedPartySettledInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeeReinvested" id="mic_PerformanceFeeReinvested" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLivesTableTextBlock" id="mic_ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLivesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="IntangibleAssetsAmortizationPeriodTableTextBlock" id="mic_IntangibleAssetsAmortizationPeriodTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="RegulatoryAssetsAndLiabilitiesPolicyTextBlock" id="mic_RegulatoryAssetsAndLiabilitiesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanFinalYearCompensationPercentage" id="mic_DefinedContributionPlanFinalYearCompensationPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanFinalYearCompensationMaximumAmount" id="mic_DefinedContributionPlanFinalYearCompensationMaximumAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanRetirementAgeMinimum" id="mic_DefinedBenefitPlanRetirementAgeMinimum" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedContributionPlanAdditionalCostRecognized" id="mic_DefinedContributionPlanAdditionalCostRecognized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="MedicalPremiumsPayment" id="mic_MedicalPremiumsPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="LifeInsuranceContractsDeathBenefitsToInsured" id="mic_LifeInsuranceContractsDeathBenefitsToInsured" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="DefinedBenefitPlanDeferredAmortizationPeriod" id="mic_DefinedBenefitPlanDeferredAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanEarlyRetirementAge" id="mic_DefinedBenefitPlanEarlyRetirementAge" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitSupplementalPlansMember" id="mic_DefinedBenefitSupplementalPlansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossAxis" id="mic_AccumulatedOtherComprehensiveIncomeLossAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TotalMembersAccumulatedOtherComprehensiveLossNetOfTaxesMember" id="mic_TotalMembersAccumulatedOtherComprehensiveLossNetOfTaxesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AdvisoryCostsIncurred" id="mic_AdvisoryCostsIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="EquityOfferingMember" id="mic_EquityOfferingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="IdahoWindPartnersMember" id="mic_IdahoWindPartnersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AtlanticAviationMember" id="mic_AtlanticAviationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="KansasCityMember" id="mic_KansasCityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="EquityBridgeLoanMember" id="mic_EquityBridgeLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="MihiLlcMember" id="mic_MihiLlcMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DebtIssuanceCostsAmortizationPeriod" id="mic_DebtIssuanceCostsAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="InvestmentProjectEstimatedLifeTerm" id="mic_InvestmentProjectEstimatedLifeTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="HawaiiGasBusinessMember" id="mic_HawaiiGasBusinessMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LeaseholdInterestsMember" id="mic_LeaseholdInterestsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="UnhedgedDebt" id="mic_UnhedgedDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TaxExemptBondMember" id="mic_TaxExemptBondMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="MacquarieBankLimitedMember" id="mic_MacquarieBankLimitedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnitsShares" id="mic_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnitsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsMayTwentyOneTwentyFourteenMember" id="mic_RestrictedStockUnitGrantsMayTwentyOneTwentyFourteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsMayTwentyTwentyThirteenMember" id="mic_RestrictedStockUnitGrantsMayTwentyTwentyThirteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsMayThirtyOneTwentyTwelveMember" id="mic_RestrictedStockUnitGrantsMayThirtyOneTwentyTwelveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsFebruaryTwentyOneTwentyThirteenMember" id="mic_RestrictedStockUnitGrantsFebruaryTwentyOneTwentyThirteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsJuneTwoTwentyElevenMember" id="mic_RestrictedStockUnitGrantsJuneTwoTwentyElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsAugustTwelveTwentyElevenMember" id="mic_RestrictedStockUnitGrantsAugustTwelveTwentyElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="InternationalMatexTankTerminalsAcquisitionMember" id="mic_InternationalMatexTankTerminalsAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PaymentsForProceedsFromDerivativesContracts" id="mic_PaymentsForProceedsFromDerivativesContracts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PaymentOnEarlyTerminationOfInterestRateSwapAgreement" id="mic_PaymentOnEarlyTerminationOfInterestRateSwapAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TankCapacity" id="mic_TankCapacity" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="MacquarieEnergyNorthAmericaTradingMember" id="mic_MacquarieEnergyNorthAmericaTradingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SentientMember" id="mic_SentientMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="FiniteAndIndefiniteLivedTradeNamesGross" id="mic_FiniteAndIndefiniteLivedTradeNamesGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DividendThirteenMember" id="mic_DividendThirteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendTwleveMember" id="mic_DividendTwleveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendElevenMember" id="mic_DividendElevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendTenMember" id="mic_DividendTenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendNineMember" id="mic_DividendNineMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendEightMember" id="mic_DividendEightMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendSevenMember" id="mic_DividendSevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendSixMember" id="mic_DividendSixMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendFiveMember" id="mic_DividendFiveMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendFourMember" id="mic_DividendFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendThreeMember" id="mic_DividendThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendTwoMember" id="mic_DividendTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DividendOneMember" id="mic_DividendOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="IncrementalTermLoanMember" id="mic_IncrementalTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfIncomeLossAllocatedToCoinvestor" id="mic_PercentageOfIncomeLossAllocatedToCoinvestor" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="ContractedPowerGenerationFacilitiesMember" id="mic_ContractedPowerGenerationFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AllOtherMember" id="mic_AllOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CashDividendPaidToManagerRelatedParty" id="mic_CashDividendPaidToManagerRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="UntilTwoThousandFifteenMember" id="mic_UntilTwoThousandFifteenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TwoThousandSixteenToTwoThousandTwentySevenMember" id="mic_TwoThousandSixteenToTwoThousandTwentySevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AfterTwoThousandTwentySevenMember" id="mic_AfterTwoThousandTwentySevenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SolarPowerGenerationBusinessesTucsonArizonaMember" id="mic_SolarPowerGenerationBusinessesTucsonArizonaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfComponentsOfNetInvestmentInDirectFinancingLeasesTableTextBlock" id="mic_ScheduleOfComponentsOfNetInvestmentInDirectFinancingLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CapitalLeasesNetInvestmentInDirectFinancingLeasesTerms" id="mic_CapitalLeasesNetInvestmentInDirectFinancingLeasesTerms" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedNonemployeeServicesTransactionQuantityOfSecuritiesGranted" id="mic_ShareBasedNonemployeeServicesTransactionQuantityOfSecuritiesGranted" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedNonemployeeServicesTransactionPriceOfStockUnitsGranted" id="mic_ShareBasedNonemployeeServicesTransactionPriceOfStockUnitsGranted" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedNonemployeeServicesTransactionGrantDate" id="mic_ShareBasedNonemployeeServicesTransactionGrantDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="RangeOneMember" id="mic_RangeOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RangeTwoMember" id="mic_RangeTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range3Member" id="mic_Range3Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range4Member" id="mic_Range4Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range5Member" id="mic_Range5Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range6Member" id="mic_Range6Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range7Member" id="mic_Range7Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range8Member" id="mic_Range8Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range9Member" id="mic_Range9Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range10Member" id="mic_Range10Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range11Member" id="mic_Range11Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range12Member" id="mic_Range12Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range13Member" id="mic_Range13Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CapacityOfPlant" id="mic_CapacityOfPlant" type="num:powerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="AccumulatedGoodwillAcquiredDuringPriorBusinessAcquisitionsNetOfDisposals" id="mic_AccumulatedGoodwillAcquiredDuringPriorBusinessAcquisitionsNetOfDisposals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedNonemployeeServicesTransactionVestingDate" id="mic_ShareBasedNonemployeeServicesTransactionVestingDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="EquipmentLeaseReceivableCurrent" id="mic_EquipmentLeaseReceivableCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="EquipmentLeaseReceivableNoncurrent" id="mic_EquipmentLeaseReceivableNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="EquipmentLeaseReceivableTotal" id="mic_EquipmentLeaseReceivableTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="NumberOfSharesIssuedToManagerForBaseManagementPerformanceFees" id="mic_NumberOfSharesIssuedToManagerForBaseManagementPerformanceFees" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="NumberOfSharesIssuedToManagerForSubsequentBaseManagementAndPerformanceFees" id="mic_NumberOfSharesIssuedToManagerForSubsequentBaseManagementAndPerformanceFees" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="MaximumRangeForRemediation" id="mic_MaximumRangeForRemediation" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="MinimumRangeForRemediation" id="mic_MinimumRangeForRemediation" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromInvestmentDividendsOrDistributionsReturnOfCapital" id="mic_ProceedsFromInvestmentDividendsOrDistributionsReturnOfCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="SolarPowerGenerationBusinessesPresidioTexasMember" id="mic_SolarPowerGenerationBusinessesPresidioTexasMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanMeasurementPeriod" id="mic_DefinedBenefitPlanMeasurementPeriod" type="xbrli:gMonthDayItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="NumberOfDebtInstruments" id="mic_NumberOfDebtInstruments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="CapitalContributionToInvestmentOrSubsidiary" id="mic_CapitalContributionToInvestmentOrSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceAdjustment" id="mic_BusinessAcquisitionPurchasePriceAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="DavisMonthanAirForceBaseMember" id="mic_DavisMonthanAirForceBaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ValleyCenterMember" id="mic_ValleyCenterMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanAssetAllocationsAxis" id="mic_DefinedBenefitPlanAssetAllocationsAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TermLoanOneMember" id="mic_TermLoanOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TermLoanTwoMember" id="mic_TermLoanTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CashAndMoneyMarketMember" id="mic_CashAndMoneyMarketMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="UsEquitySecuritiesMember" id="mic_UsEquitySecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="InternationalEquitySecuritiesMember" id="mic_InternationalEquitySecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal" id="mic_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="EasementsGross" id="mic_EasementsGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DueToManagerRelatedParty" id="mic_DueToManagerRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="RamonaMember" id="mic_RamonaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NotesPayableAndCapitalLeasesCurrent" id="mic_NotesPayableAndCapitalLeasesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="NotesPayableAndCapitalLeasesNoncurrent" id="mic_NotesPayableAndCapitalLeasesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TaxBasisGainLossFromDivestitureOfBusiness" id="mic_TaxBasisGainLossFromDivestitureOfBusiness" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfChangesInProjectedBenefitObligationsAndChangesInPlanAssetsTableTextBlock" id="mic_ScheduleOfChangesInProjectedBenefitObligationsAndChangesInPlanAssetsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfWeightedAverageAssetAllocationTableTextBlock" id="mic_ScheduleOfWeightedAverageAssetAllocationTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="BrahmsProjectMember" id="mic_BrahmsProjectMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="VariableTermLoanInterestRateFloor" id="mic_VariableTermLoanInterestRateFloor" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="FinancingEquipmentLeaseIncomeNet" id="mic_FinancingEquipmentLeaseIncomeNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="FeesToManagerRelatedParty" id="mic_FeesToManagerRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfOutstandingDebtHedged" id="mic_PercentageOfOutstandingDebtHedged" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="TotalTermDebtMember" id="mic_TotalTermDebtMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="OperatingLossCarryforwardsSubjectToLimitation" id="mic_OperatingLossCarryforwardsSubjectToLimitation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="GainLossFromAcquisitionAndDivestitureOfBusiness" id="mic_GainLossFromAcquisitionAndDivestitureOfBusiness" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TotalDeferredIncomeTaxExpenseBenefit" id="mic_TotalDeferredIncomeTaxExpenseBenefit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DeferredTaxAssetsLeasingTransactionCosts" id="mic_DeferredTaxAssetsLeasingTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DepreciationExpenseAndDepreciationInCostOfService" id="mic_DepreciationExpenseAndDepreciationInCostOfService" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NoncashGainLossOnDispositionOfAssets" id="mic_NoncashGainLossOnDispositionOfAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="BaseManagementFeesSettledInShares" id="mic_BaseManagementFeesSettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeesSettledInShares" id="mic_PerformanceFeesSettledInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquipmentLeaseReceivableNet" id="mic_EquipmentLeaseReceivableNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInDeferredRent" id="mic_IncreaseDecreaseInDeferredRent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInDueToManagerRelatedParty" id="mic_IncreaseDecreaseInDueToManagerRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationTaxableDividendInExcessOfBookIncome" id="mic_IncomeTaxReconciliationTaxableDividendInExcessOfBookIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationBookIncomeInExcessOfTaxableDividend" id="mic_IncomeTaxReconciliationBookIncomeInExcessOfTaxableDividend" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationIncreaseInBookBasisInExcessOfTaxBasis" id="mic_IncomeTaxReconciliationIncreaseInBookBasisInExcessOfTaxBasis" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationGainLossOnFairValuationOfExistingInvestmentInImtt" id="mic_IncomeTaxReconciliationGainLossOnFairValuationOfExistingInvestmentInImtt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxReconciliationGainLossOnSaleOfDistrictEnergyBusiness" id="mic_IncomeTaxReconciliationGainLossOnSaleOfDistrictEnergyBusiness" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpenses" id="mic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="EquityMethodInvestmentsCarryingValue" id="mic_EquityMethodInvestmentsCarryingValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationWriteOffOfAccumulatedOtherComprehensiveIncomeLoss" id="mic_BusinessCombinationWriteOffOfAccumulatedOtherComprehensiveIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="EquityIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction" id="mic_EquityIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfSharesToManagerForPerformanceFees" id="mic_IssuanceOfSharesToManagerForPerformanceFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfSharesToManagerForBaseManagementFees" id="mic_IssuanceOfSharesToManagerForBaseManagementFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IssuanceOfSharesToIndependentDirectors" id="mic_IssuanceOfSharesToIndependentDirectors" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenses" id="mic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="MacquarieInfrastructureCompanyDirectProgramMember" id="mic_MacquarieInfrastructureCompanyDirectProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfIncomeLossFlipped" id="mic_PercentageOfIncomeLossFlipped" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="AccumulatedOtherComprehensiveIncomeLossDomain" id="mic_AccumulatedOtherComprehensiveIncomeLossDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="AdditionalPowerGenerationFacilitiesMember" id="mic_AdditionalPowerGenerationFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="EquityMethodInvestmentOwnershipPercentageAcquired" id="mic_EquityMethodInvestmentOwnershipPercentageAcquired" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CapitalContributionToSubsidiary" id="mic_CapitalContributionToSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CapitalExpenditureForReportSegmentTableTextBlock" id="mic_CapitalExpenditureForReportSegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CapitalExpenditureLoanFacilityMember" id="mic_CapitalExpenditureLoanFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CapitalLossCarrybackAmount" id="mic_CapitalLossCarrybackAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="CasualtyGainLossNet" id="mic_CasualtyGainLossNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CommonStockEquityLineItems" id="mic_CommonStockEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CommonStockEquityTable" id="mic_CommonStockEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CommonStockSharesDividendPaidOn" id="mic_CommonStockSharesDividendPaidOn" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CoolingCapacityRevenue" id="mic_CoolingCapacityRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CoolingConsumptionRevenue" id="mic_CoolingConsumptionRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CorporateIncomeTaxRate" id="mic_CorporateIncomeTaxRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="CostOfGoodsSoldUtility" id="mic_CostOfGoodsSoldUtility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DebtDisclosureLineItems" id="mic_DebtDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DebtDisclosureTable" id="mic_DebtDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentOwnershipCovenant" id="mic_DebtInstrumentOwnershipCovenant" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentTickingFee" id="mic_DebtInstrumentTickingFee" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="DebtToTotalCapital" id="mic_DebtToTotalCapital" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="DefinedBenefitPlanAssetAllocationsDomain" id="mic_DefinedBenefitPlanAssetAllocationsDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="DocumentDocumentandEntityInformationAbstract" id="mic_DocumentDocumentandEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="EarningsBeforeInterestTaxesDepreciationAndAmortizationExcludingNonCashItems" id="mic_EarningsBeforeInterestTaxesDepreciationAndAmortizationExcludingNonCashItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ExistingDebtInstrumentsMember" id="mic_ExistingDebtInstrumentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="FederalFundsRateMember" id="mic_FederalFundsRateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="FederalMember" id="mic_FederalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="FinanceEquipmentLease" id="mic_FinanceEquipmentLease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxesLineItems" id="mic_IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="IncomeTaxesTable" id="mic_IncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInDeferredTaxAssetsValuationAllowance" id="mic_IncreaseDecreaseInDeferredTaxAssetsValuationAllowance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="InterestRateSwapBreakageFees" id="mic_InterestRateSwapBreakageFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="LeasesDisclosureLineItems" id="mic_LeasesDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LeasesDisclosureTable" id="mic_LeasesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LeverageRatio" id="mic_LeverageRatio" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="LineOfCreditFacilityAmortizationPercentage" id="mic_LineOfCreditFacilityAmortizationPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="MinimumCashRequirement" id="mic_MinimumCashRequirement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="MinimumPeriodForEmployerContributionToDefinedBenefitPlan" id="mic_MinimumPeriodForEmployerContributionToDefinedBenefitPlan" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="MinimumServicePeriodRequiredToAvailPostretirementBenefits" id="mic_MinimumServicePeriodRequiredToAvailPostretirementBenefits" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="NumberOfRegulatoryRequirement" id="mic_NumberOfRegulatoryRequirement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="NumberOfSolarProjectsAcquired" id="mic_NumberOfSolarProjectsAcquired" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="NumberOfWindProjects" id="mic_NumberOfWindProjects" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="OperatingLossCarryforwardsLimitationPerYear" id="mic_OperatingLossCarryforwardsLimitationPerYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="OperatingLossCarryforwardsPeriodIncreaseDecrease" id="mic_OperatingLossCarryforwardsPeriodIncreaseDecrease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" id="mic_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" id="mic_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfDebtHedgedByInterestRateDerivativesNonDesignated" id="mic_PercentageOfDebtHedgedByInterestRateDerivativesNonDesignated" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="PercentageOfExcessCashGeneratedToPrepayDebt" id="mic_PercentageOfExcessCashGeneratedToPrepayDebt" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="PercentageOfOwnershipInterestSold" id="mic_PercentageOfOwnershipInterestSold" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfTaxDepreciation" id="mic_PercentageOfTaxDepreciation" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="PostretirementAgeToPayMedicalPremiumForRetireesAndSpousesMaximum" id="mic_PostretirementAgeToPayMedicalPremiumForRetireesAndSpousesMaximum" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="PropertyPlantEquipmentGoodwillAndTotalAssetsReportableSegmentTableTextBlock" id="mic_PropertyPlantEquipmentGoodwillAndTotalAssetsReportableSegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="Range1Member" id="mic_Range1Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="Range2Member" id="mic_Range2Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ReportableSegmentOneMember" id="mic_ReportableSegmentOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="RequiredPrincipalDebtRepayment" id="mic_RequiredPrincipalDebtRepayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RequiredPrincipalDebtRepaymentAndInterestRateSwapFeesIncurred" id="mic_RequiredPrincipalDebtRepaymentAndInterestRateSwapFeesIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="RestrictedStockUnitGrantsJuneThreeTwentyTenMember" id="mic_RestrictedStockUnitGrantsJuneThreeTwentyTenMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SalesRevenueUtilityNet" id="mic_SalesRevenueUtilityNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDefinedContributionPensionAndOtherPostretirementPlansDisclosureLineItems" id="mic_ScheduleOfDefinedContributionPensionAndOtherPostretirementPlansDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDefinedContributionPensionAndOtherPostretirementPlansDisclosureTable" id="mic_ScheduleOfDefinedContributionPensionAndOtherPostretirementPlansDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfFutureMinimumLeasePaymentsToBeReceivedUnderDirectFinancingLeasesTableTextBlock" id="mic_ScheduleOfFutureMinimumLeasePaymentsToBeReceivedUnderDirectFinancingLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPensionAndOtherPostretirmentBenefitsChangesInBenefitObligationAndFairValueOfPlanAssetsLineItems" id="mic_ScheduleOfPensionAndOtherPostretirmentBenefitsChangesInBenefitObligationAndFairValueOfPlanAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPensionAndOtherPostretirmentBenefitsChangesInBenefitObligationAndFairValueOfPlanAssetsTable" id="mic_ScheduleOfPensionAndOtherPostretirmentBenefitsChangesInBenefitObligationAndFairValueOfPlanAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPensionAndOtherPostretirmentBenefitsExpectedBenefitPaymentsLineItems" id="mic_ScheduleOfPensionAndOtherPostretirmentBenefitsExpectedBenefitPaymentsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPensionAndOtherPostretirmentBenefitsExpectedBenefitPaymentsTable" id="mic_ScheduleOfPensionAndOtherPostretirmentBenefitsExpectedBenefitPaymentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SecondAmendedAndRestatedManagementServiceAgreementMember" id="mic_SecondAmendedAndRestatedManagementServiceAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentInformationBySecondarySegmentDomain" id="mic_SegmentInformationBySecondarySegmentDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentReportingAssets" id="mic_SegmentReportingAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="SegmentReportingInformationBySecondarySegmentAxis" id="mic_SegmentReportingInformationBySecondarySegmentAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorSecuredTermLoanFacilityMember" id="mic_SeniorSecuredTermLoanFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SharesActivityLineItems" id="mic_SharesActivityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SignificantAccountingPoliciesLineItems" id="mic_SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SignificantAccountingPoliciesTable" id="mic_SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="StateMember" id="mic_StateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TermLoanCreditFacilityMadatoryPrepaymentThresholdCondemnationProceeds" id="mic_TermLoanCreditFacilityMadatoryPrepaymentThresholdCondemnationProceeds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TermLoanCreditFacilityMadatoryPrepaymentThresholdInsuranceProceeds" id="mic_TermLoanCreditFacilityMadatoryPrepaymentThresholdInsuranceProceeds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TermLoanCreditFacilityMadatoryPrepaymentThresholdNetProceedsSaleOfAssetsNotReinvested" id="mic_TermLoanCreditFacilityMadatoryPrepaymentThresholdNetProceedsSaleOfAssetsNotReinvested" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TermLoanFacilityMember" id="mic_TermLoanFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TermLoanFacilityPrepaymentFeePercentage" id="mic_TermLoanFacilityPrepaymentFeePercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="TotalAssetsCorporateAndOther" id="mic_TotalAssetsCorporateAndOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="TotalDistributionDeclaredToAllShareholdersFromEquityMethodInvestment" id="mic_TotalDistributionDeclaredToAllShareholdersFromEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TotalDistributionDeclaredToEachInvestorFromEquityMethodInvestment" id="mic_TotalDistributionDeclaredToEachInvestorFromEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TotalDistributionPaidToAllShareholdersFromEquityMethodInvestment" id="mic_TotalDistributionPaidToAllShareholdersFromEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TotalDistributionPaidToCompanyFromEquityMethodInvestment" id="mic_TotalDistributionPaidToCompanyFromEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TotalDistributionPaidToEachInvestorFromEquityMethodInvestment" id="mic_TotalDistributionPaidToEachInvestorFromEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TotalReportableSegmentsMember" id="mic_TotalReportableSegmentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TotalRevenueFromProductSalesNet" id="mic_TotalRevenueFromProductSalesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="BusinessAcquisitionFairValuationAdjustmentToNonControllingInterestOnAcquisition" id="mic_BusinessAcquisitionFairValuationAdjustmentToNonControllingInterestOnAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ContractedPowerAndEnergyMember" id="mic_ContractedPowerAndEnergyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ReportableSegmentMember" id="mic_ReportableSegmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TaxExemptBondsMember" id="mic_TaxExemptBondsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LoanFromPreviousShareholderMember" id="mic_LoanFromPreviousShareholderMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="GulfOpportunityZoneBondsOneMember" id="mic_GulfOpportunityZoneBondsOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="GulfOpportunityZoneBondsTwoMember" id="mic_GulfOpportunityZoneBondsTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="GulfOpportunityZoneBondsThreeMember" id="mic_GulfOpportunityZoneBondsThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="GulfOpportunityZoneBondsFourMember" id="mic_GulfOpportunityZoneBondsFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NewJerseyEconomicDevelopmentAuthorityDockFacilityRevenueRefundBondsMember" id="mic_NewJerseyEconomicDevelopmentAuthorityDockFacilityRevenueRefundBondsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="NewJerseyEconomicDevelopmentAuthorityVariableRateDemandRevenueRefundingBondsMember" id="mic_NewJerseyEconomicDevelopmentAuthorityVariableRateDemandRevenueRefundingBondsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesLongTermDebt" id="mic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="LineOfCreditFacilityCollateralPercentOfInterestInAffiliates" id="mic_LineOfCreditFacilityCollateralPercentOfInterestInAffiliates" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentInterestRateFixedPercentageTerm" id="mic_DebtInstrumentInterestRateFixedPercentageTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentPercentageOfVariableRate" id="mic_DebtInstrumentPercentageOfVariableRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="OperatingLossCarryforwardsExpectedToBeUtilized" id="mic_OperatingLossCarryforwardsExpectedToBeUtilized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="DistributionsPayableToNoncontrollingInterest" id="mic_DistributionsPayableToNoncontrollingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NoncashGainLossFromAcquisitionAndDivestitureOfBusiness" id="mic_NoncashGainLossFromAcquisitionAndDivestitureOfBusiness" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="BayonneTerminalEmployeesMember" id="mic_BayonneTerminalEmployeesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash" id="mic_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRestrictedCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="WindPowerGenerationFacilities2014Member" id="mic_WindPowerGenerationFacilities2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SolarPowerGenerationFacilitiesAcquiredIn2012Member" id="mic_SolarPowerGenerationFacilitiesAcquiredIn2012Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SolarPowerGenerationFacilitiesAcquiredIn2013Member" id="mic_SolarPowerGenerationFacilitiesAcquiredIn2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeeToManagerRelatedPartyReinvestedInShares" id="mic_PerformanceFeeToManagerRelatedPartyReinvestedInShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="DistributionsPayableToNoncontrollingInterests" id="mic_DistributionsPayableToNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CollectiveBargainingAgreementTerm" id="mic_CollectiveBargainingAgreementTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="PeriodAfterWhichIncreasesInBenefitWillOccurAnnually" id="mic_PeriodAfterWhichIncreasesInBenefitWillOccurAnnually" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="TermLoanCreditFacilityMadatoryPrepaymentThresholdGuaranteedPerformanceCommitment" id="mic_TermLoanCreditFacilityMadatoryPrepaymentThresholdGuaranteedPerformanceCommitment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="MinimumPeriodForWhichBusinessIsNotExpectedToMakeContributions" id="mic_MinimumPeriodForWhichBusinessIsNotExpectedToMakeContributions" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="BecMember" id="mic_BecMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfEnergyGeneratingCapacityForWhichAcquireeHasCreditworthyOffTaker" id="mic_PercentageOfEnergyGeneratingCapacityForWhichAcquireeHasCreditworthyOffTaker" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="ChangeInNoncontrollingInterestFromAcquisitionsDispositions" id="mic_ChangeInNoncontrollingInterestFromAcquisitionsDispositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NumberOfWindTurbines" id="mic_NumberOfWindTurbines" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="SolarPowerGenerationFacilitiesMember" id="mic_SolarPowerGenerationFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ChangeInDebtInstrumentFixedMargin" id="mic_ChangeInDebtInstrumentFixedMargin" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="InterestRateSwapAndCommoditySwapMember" id="mic_InterestRateSwapAndCommoditySwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="LossesOnDerivativeContractsMember" id="mic_LossesOnDerivativeContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="TwentyFourteenIndependentDirectorEquityPlanMember" id="mic_TwentyFourteenIndependentDirectorEquityPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="SharesAuthorizedUnderDirectorEquityPlan" id="mic_SharesAuthorizedUnderDirectorEquityPlan" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="MaximumFairValueOfAwardGrantDate" id="mic_MaximumFairValueOfAwardGrantDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="NonReportableSegmentMember" id="mic_NonReportableSegmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PerformanceFeeToManagerRelatedPartySettledInSharesAndOrCash" id="mic_PerformanceFeeToManagerRelatedPartySettledInSharesAndOrCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="FederalAndStateMember" id="mic_FederalAndStateMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="ExpectedFederalTaxableIncomeLossForPeriod" id="mic_ExpectedFederalTaxableIncomeLossForPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PensionsPlansDefinedBenefitAndUnionMember" id="mic_PensionsPlansDefinedBenefitAndUnionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="PeriodOfAverageDiscountRateDefinedBenefitUnderStatutoryFundingFormulas" id="mic_PeriodOfAverageDiscountRateDefinedBenefitUnderStatutoryFundingFormulas" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="StatutoryFundingPercentage" id="mic_StatutoryFundingPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xsd:element name="WeightedAverageLifeOfTollingAgreements" id="mic_WeightedAverageLifeOfTollingAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xsd:element name="OneMonthLiborMember" id="mic_OneMonthLiborMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
</xsd:schema>


