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  <xsd:element name="NumberOfAllegedRuleViolations" id="pagp_NumberOfAllegedRuleViolations" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="pagp_PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" name="PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_OtherInventoryMember" name="OtherInventoryMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_Line901IncidentMember" name="Line901IncidentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_MP29ReleaseMember" name="MP29ReleaseMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PipelineAndHazardousMaterialsSafetyAdministrationMember" name="PipelineAndHazardousMaterialsSafetyAdministrationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ClassActionLawsuitsMember" name="ClassActionLawsuitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NetProceedsFromRepaymentsOfHedgedInventoryFacility" name="NetProceedsFromRepaymentsOfHedgedInventoryFacility" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" id="pagp_TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="pagp_NetCashPaidReceivedForTerminatedHedgingInstruments" name="NetCashPaidReceivedForTerminatedHedgingInstruments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PipelineLossAllowanceCrudeOilLongCallOptionMember" name="PipelineLossAllowanceCrudeOilLongCallOptionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SecuritiesLawClassActionLawsuitsMember" name="SecuritiesLawClassActionLawsuitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_RelatedPartyTransactionPurchasesFromRelatedPartyNetCredit" name="RelatedPartyTransactionPurchasesFromRelatedPartyNetCredit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NetShortPositionContractsRelatedToAnticipatedNetSalesOfInventoryMember" name="NetShortPositionContractsRelatedToAnticipatedNetSalesOfInventoryMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LineOfCreditAndCommercialPaperMember" name="LineOfCreditAndCommercialPaperMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_GeneralPartnerDistributionPercentage" name="GeneralPartnerDistributionPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SeniorNotesDueInAugust2016At5.88PercentMember" name="SeniorNotesDueInAugust2016At5.88PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SeniorNotesDueInJanuary2017At6.13PercentMember" name="SeniorNotesDueInJanuary2017At6.13PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PaaCreditFacilitiesMember" name="PaaCreditFacilitiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_CapitalContributionsToEquityMethodInvestees" name="CapitalContributionsToEquityMethodInvestees" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_MesaToBasinPipelineReleaseMember" name="MesaToBasinPipelineReleaseMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ThirdPartyEnvironmentalRecoveriesReceivedAndReceivable" name="ThirdPartyEnvironmentalRecoveriesReceivedAndReceivable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NumberOfOccasionsFailedToCarryOutProgramAndProcedures" name="NumberOfOccasionsFailedToCarryOutProgramAndProcedures" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LossContingencyPenaltyOrFineRecommended" name="LossContingencyPenaltyOrFineRecommended" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PartnersCapitalAccountSaleOfUnitsPricePerUnit" name="PartnersCapitalAccountSaleOfUnitsPricePerUnit" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsAnnualizedDistributionsPerUnit" name="PreferredUnitsAnnualizedDistributionsPerUnit" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_WorstCaseEstimateMember" name="WorstCaseEstimateMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_OtherLongTermDebtMember" name="OtherLongTermDebtMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_UnitholderDerivativeLawsuitsMember" name="UnitholderDerivativeLawsuitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SeniorSecuredHedgedInventoryFacilityMember" name="SeniorSecuredHedgedInventoryFacilityMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SegmentProfit" name="SegmentProfit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NoncontrollingInterestIncreaseFromSubsidiaryPreferredUnitIssuance" name="NoncontrollingInterestIncreaseFromSubsidiaryPreferredUnitIssuance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NoncontrollingInterestIncreaseFromSubsidiaryCommonUnitIssuance" name="NoncontrollingInterestIncreaseFromSubsidiaryCommonUnitIssuance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_FirstQuarterDistributionFiscalYear2016Member" name="FirstQuarterDistributionFiscalYear2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_FourthQuarterDistributionFiscalYear2015Member" name="FourthQuarterDistributionFiscalYear2015Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PlainsAllAmericanGPLLCMember" name="PlainsAllAmericanGPLLCMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SubsidiaryUnitsConverted" name="SubsidiaryUnitsConverted" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LimitedPartnersCapitalAccountSharesIssuedFromConversion" name="LimitedPartnersCapitalAccountSharesIssuedFromConversion" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ExchangeOfAapUnitsAndClassBSharesForClassaSharesMember" name="ExchangeOfAapUnitsAndClassBSharesForClassaSharesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ConversionOfAapManagementUnitsIntoAapUnitsAndClassBSharesMember" name="ConversionOfAapManagementUnitsIntoAapUnitsAndClassBSharesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ProceedsFromSubsidiaryIssuanceOfPreferredLimitedPartnersUnits" name="ProceedsFromSubsidiaryIssuanceOfPreferredLimitedPartnersUnits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ProceedsFromSubsidiaryIssuanceOfCommonLimitedPartnersUnits" name="ProceedsFromSubsidiaryIssuanceOfCommonLimitedPartnersUnits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_DepreciationAndAmortizationMember" name="DepreciationAndAmortizationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsPeriodAfterFifthAndSubsequentAnniversariesForDistributionRateReset" name="PreferredUnitsPeriodAfterFifthAndSubsequentAnniversariesForDistributionRateReset" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsNumberOfDistributionRateResetElectionsAllowed" name="PreferredUnitsNumberOfDistributionRateResetElectionsAllowed" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsDistributionRateResetBasisSpreadOnVariableRate" name="PreferredUnitsDistributionRateResetBasisSpreadOnVariableRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsPeriodAfterWhichUnitholdersMayConvertToCommonUnits" name="PreferredUnitsPeriodAfterWhichUnitholdersMayConvertToCommonUnits" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsPeriodAfterWhichIssuerMayConvertToCommonUnits" name="PreferredUnitsPeriodAfterWhichIssuerMayConvertToCommonUnits" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsConversionRatio" name="PreferredUnitsConversionRatio" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LossContingencyNumberOfCasesConsolidatedIntoSingleProceeding" name="LossContingencyNumberOfCasesConsolidatedIntoSingleProceeding" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ProductionOfCertainBooksAndRecordsLawsuitMember" name="ProductionOfCertainBooksAndRecordsLawsuitMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SeriesaPreferredUnitsMember" name="SeriesaPreferredUnitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SecondQuarterDistributionFiscalYear2016Member" name="SecondQuarterDistributionFiscalYear2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PreferredUnitsQuarterlyDistributionsPerUnit" name="PreferredUnitsQuarterlyDistributionsPerUnit" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2017Member" name="ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2017Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ScheduleOfCalculationOfBasicAndDilutedNetIncomePerClassShareTable" name="ScheduleOfCalculationOfBasicAndDilutedNetIncomePerClassShareTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_BasicAndDilutedNetIncomePerClassShareLineItems" name="BasicAndDilutedNetIncomePerClassShareLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SimplificationAgreementMember" name="SimplificationAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_TradeAccountsReceivableAndOtherReceivablesMember" name="TradeAccountsReceivableAndOtherReceivablesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IntegratedSystemOfNGLAssetsMember" name="IntegratedSystemOfNGLAssetsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PlainsGpHoldingsLpMember" name="PlainsGpHoldingsLpMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_OriginalDesignatingPartiesMember" name="OriginalDesignatingPartiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SimplificationTransactionsTextBlock" name="SimplificationTransactionsTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EightForwardStartingThirtyYearInterestRateSwaps2.02PercentMember" name="EightForwardStartingThirtyYearInterestRateSwaps2.02PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EightForwardStartingThirtyYearInterestRateSwaps3.14PercentMember" name="EightForwardStartingThirtyYearInterestRateSwaps3.14PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EightForwardStartingThirtyYearInterestRateSwaps3.20PercentMember" name="EightForwardStartingThirtyYearInterestRateSwaps3.20PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EightForwardStartingThirtyYearInterestRateSwaps2.83PercentMember" name="EightForwardStartingThirtyYearInterestRateSwaps2.83PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EightForwardStartingThirtyYearInterestRateSwaps3.06PercentMember" name="EightForwardStartingThirtyYearInterestRateSwaps3.06PercentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_CheyennePipelineLlcMember" name="CheyennePipelineLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NonCoreAssetsDisposalGroupMember" name="NonCoreAssetsDisposalGroupMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PercentageOfInvestmentSold" name="PercentageOfInvestmentSold" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerEconomicOwnershipInterestConvertedIntoNonEconomicInterest" name="LimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerEconomicOwnershipInterestConvertedIntoNonEconomicInterest" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NumberOfEmployeesChargedInIndictment" name="NumberOfEmployeesChargedInIndictment" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentTotalNumberOfCounts" name="IndictmentTotalNumberOfCounts" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentNumberOfMisdemeanorChargesRelatingToWildlife" name="IndictmentNumberOfMisdemeanorChargesRelatingToWildlife" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentNumberOfFelonyCharges" name="IndictmentNumberOfFelonyCharges" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentInCaliforniaSuperiorCourtSantaBarbaraCountyMember" name="IndictmentInCaliforniaSuperiorCourtSantaBarbaraCountyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_RailAndOtherTerminalAssetsMember" name="RailAndOtherTerminalAssetsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PaaGpHoldingsLlcMember" name="PaaGpHoldingsLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ThresholdOwnershipPercentageForRelatedPartyDirectorNomination" name="ThresholdOwnershipPercentageForRelatedPartyDirectorNomination" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NumberOfRelatedPartyDirectorsForInterestHoldersToDesignate" name="NumberOfRelatedPartyDirectorsForInterestHoldersToDesignate" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SimplificationTransactionAbstract" name="SimplificationTransactionAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NetShortPositionRelatedToAnticipatedSalesOfNaturalGasInventoryMember" name="NetShortPositionRelatedToAnticipatedSalesOfNaturalGasInventoryMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LossContingencyConsolidatedNumberOfActions" name="LossContingencyConsolidatedNumberOfActions" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_GainOnDispositionOfAssets" name="GainOnDispositionOfAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_LossOnDispositionOfAssetsAndAssetImpairmentCharges" name="LossOnDispositionOfAssetsAndAssetImpairmentCharges" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentNumberOfCountsRelatedToReleaseOfCrudeOilOrReportingOfRelease" name="IndictmentNumberOfCountsRelatedToReleaseOfCrudeOilOrReportingOfRelease" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_IndictmentNumberOfMisdemeanorChargesRelatedToReleaseOfCrudeOilOrReportingOfRelease" name="IndictmentNumberOfMisdemeanorChargesRelatedToReleaseOfCrudeOilOrReportingOfRelease" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_DebtAssumed" name="DebtAssumed" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_RatioOfReportingEntitySharesOutstandingToRelatedPartyCommonUnitsHeldBySubsidiary" name="RatioOfReportingEntitySharesOutstandingToRelatedPartyCommonUnitsHeldBySubsidiary" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_EstimatedBorrowingForTrueUpDistributionToSubsidiaryUnitholdersIfTransactionsNotClosed" name="EstimatedBorrowingForTrueUpDistributionToSubsidiaryUnitholdersIfTransactionsNotClosed" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ThirdQuarterDistributionFiscalYear2016Member" name="ThirdQuarterDistributionFiscalYear2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ThresholdPrivateOwnershipOfSubsidiaryForShareholdersToParticipateInElectionOfDirectors" name="ThresholdPrivateOwnershipOfSubsidiaryForShareholdersToParticipateInElectionOfDirectors" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryAndWorkingCapital" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventoryAndWorkingCapital" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
