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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="pagp-20150930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pagp-20150930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pagp-20150930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pagp-20150930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2014-01-31" schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2015-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2015/elts/us-types-2015-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2015-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd" />
  <xsd:element name="AAPTermLoanMember" id="pagp_AAPTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AAPRevolvingCreditFacilityMember" id="pagp_AAPRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInSeptember2015At3.95PercentMember" id="pagp_SeniorNotesDueInSeptember2015At3.95PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BasicAndDilutedEarningsPerShareLineItems" id="pagp_BasicAndDilutedEarningsPerShareLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BaySpringsPipelineReleaseMember" id="pagp_BaySpringsPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortButanePositionContractsRelatedToSubsequentSaleOfProductMember" id="pagp_ShortButanePositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashPaidRelatedToPurchasesOfLinefillAndBaseGas" id="pagp_CashPaidRelatedToPurchasesOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CashReceivedRelatedToSalesOfLinefillAndBaseGas" id="pagp_CashReceivedRelatedToSalesOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AAPManagementUnitActivityRollForward" id="pagp_AAPManagementUnitActivityRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComputationOfBasicAndDilutedEarningsPerLimitedPartnerUnitTable" id="pagp_ComputationOfBasicAndDilutedEarningsPerLimitedPartnerUnitTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DistributionEquivalentRightPayments" id="pagp_DistributionEquivalentRightPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DistributionEquivalentRightsCashPayments" id="pagp_DistributionEquivalentRightsCashPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DocumentEntityInformationAbstract" id="pagp_DocumentEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EstimatedSizeOfRelease" id="pagp_EstimatedSizeOfRelease" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GainLossOnSaleOfLinefillAndBaseGas" id="pagp_GainLossOnSaleOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IndirectOwnershipInterestInEntityMember" id="pagp_IndirectOwnershipInterestInEntityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryCurrentAndNoncurrent" id="pagp_InventoryCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" id="pagp_InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureTextBlock" id="pagp_InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryVolumesCurrent" id="pagp_InventoryVolumesCurrent" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryVolumesLinefillAndBaseGas" id="pagp_InventoryVolumesLinefillAndBaseGas" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryVolumesNoncurrent" id="pagp_InventoryVolumesNoncurrent" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitCurrent" id="pagp_InventoryWeightedAveragePricePerUnitCurrent" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" id="pagp_InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitNoncurrent" id="pagp_InventoryWeightedAveragePricePerUnitNoncurrent" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="KempRiverPipelineReleaseMember" id="pagp_KempRiverPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LineOfCreditAndCommercialPaperMember" id="pagp_LineOfCreditAndCommercialPaperMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AAPSeniorSecuredCreditAgreementMember" id="pagp_AAPSeniorSecuredCreditAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LinefillAndBaseGas" id="pagp_LinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="LongPositionOnNaturalGasContractsMember" id="pagp_LongPositionOnNaturalGasContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongPowerPositionForPowerSupplyRequirementsContractsMember" id="pagp_LongPowerPositionForPowerSupplyRequirementsContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LossContingencyPenaltyOrFineAssessed" id="pagp_LossContingencyPenaltyOrFineAssessed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="MaintenanceCapital" id="pagp_MaintenanceCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NGLMember" id="pagp_NGLMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NaturalGasMember" id="pagp_NaturalGasMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetLongPositionOnCrudeOilDerivativeContractsMember" id="pagp_NetLongPositionOnCrudeOilDerivativeContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetShortTimeSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" id="pagp_NetShortTimeSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" id="pagp_NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfDerivativesHeldWithCreditRiskRelatedContingentFeatures" id="pagp_NumberOfDerivativesHeldWithCreditRiskRelatedContingentFeatures" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfEventsResultingInRelease" id="pagp_NumberOfEventsResultingInRelease" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OffsettingAssetsLiabilitiesLineItems" id="pagp_OffsettingAssetsLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OffsettingAssetsLiabilitiesTable" id="pagp_OffsettingAssetsLiabilitiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OrganizationAndBasisOfPresentationLineItems" id="pagp_OrganizationAndBasisOfPresentationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" id="pagp_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherConsolidatedEquityCompensationInformationAbstract" id="pagp_OtherConsolidatedEquityCompensationInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="pagp_OtherNoncurrentLongTermDebt" name="OtherNoncurrentLongTermDebt" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="OutstandingUnitsEarnedRollForward" id="pagp_OutstandingUnitsEarnedRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OutstandingUnitsRollForward" id="pagp_OutstandingUnitsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PAAContinuousOfferingProgramMember" id="pagp_PAAContinuousOfferingProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PAAGPLLCMember" id="pagp_PAAGPLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalAndDistributionLineItems" id="pagp_PartnersCapitalAndDistributionLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalAndDistributionsTable" id="pagp_PartnersCapitalAndDistributionsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineTariffActivitiesTruckingAndRelatedRevenues" id="pagp_PipelineTariffActivitiesTruckingAndRelatedRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PlainsAAPLPMember" id="pagp_PlainsAAPLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsAllAmericanGPLLCMember" id="pagp_PlainsAllAmericanGPLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsAllAmericanPipelineLPMember" id="pagp_PlainsAllAmericanPipelineLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyOwnershipInterestInSubsidiaryPercentage" id="pagp_RelatedPartyOwnershipInterestInSubsidiaryPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="SLCPipelineLLCMember" id="pagp_SLCPipelineLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SalesAndRelatedRevenues" id="pagp_SalesAndRelatedRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="SalesAndRelatedRevenuesMember" id="pagp_SalesAndRelatedRevenuesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfDebtInstrumentsTable" id="pagp_ScheduleOfDebtInstrumentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfInventoryLinefillAndBaseGasAndLongTermInventoryTableTextBlock" id="pagp_ScheduleOfInventoryLinefillAndBaseGasAndLongTermInventoryTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfOffsettingAssetsAndLiabilitiesTableTextBlock" id="pagp_ScheduleOfOffsettingAssetsAndLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEarnedInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodGrantDateFairValue" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnitsEarnedOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesVestedInPeriodSettledInCash" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesVestedInPeriodSettledInCash" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PositionHedgingRiskOfNotUtilizingStorageCapacityMember" id="pagp_PositionHedgingRiskOfNotUtilizingStorageCapacityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortPropanePositionContractsRelatedToSubsequentSaleOfProductMember" id="pagp_ShortPropanePositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StandbyLettersOfCreditReceived" id="pagp_StandbyLettersOfCreditReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="StorageTerminallingProcessingAndRelatedRevenues" id="pagp_StorageTerminallingProcessingAndRelatedRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="VariationMarginPostedReturned" id="pagp_VariationMarginPostedReturned" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ShortWTIPositionContractsRelatedToSubsequentSaleOfProductMember" id="pagp_ShortWTIPositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsGPHoldingsLongTermIncentivePlansMember" id="pagp_PlainsGPHoldingsLongTermIncentivePlansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationPlanAAPManagementUnitsMember" id="pagp_EquityBasedCompensationPlanAAPManagementUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GrantDateFairValueOfOutstandingAAPManagementUnitsRollForward" id="pagp_GrantDateFairValueOfOutstandingAAPManagementUnitsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsAllAmericanLongTermIncentivePlansMember" id="pagp_PlainsAllAmericanLongTermIncentivePlansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterestUnits" id="pagp_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterestUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInJune2015At5.25PercentMember" id="pagp_SeniorNotesDueInJune2015At5.25PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInAugust2016At5.88PercentMember" id="pagp_SeniorNotesDueInAugust2016At5.88PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LimitedPartnersCapitalAccountUnitsOrSharesExchanged" id="pagp_LimitedPartnersCapitalAccountUnitsOrSharesExchanged" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalDeferredTaxAsset" id="pagp_PartnersCapitalDeferredTaxAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="UnallocatedGeneralAndAdministrativeExpense" id="pagp_UnallocatedGeneralAndAdministrativeExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AAPUnitsMember" id="pagp_AAPUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LimitedPartnersCapitalAccountSharesIssuedInExchange" id="pagp_LimitedPartnersCapitalAccountSharesIssuedInExchange" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="UnitExchangeRatio" id="pagp_UnitExchangeRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CrudeOilGradeSpreadPositionsMember" id="pagp_CrudeOilGradeSpreadPositionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReductionInCashAvailableForDistribution" id="pagp_ReductionInCashAvailableForDistribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="DistributionsReceivedFromConsolidatedSubsidiary" id="pagp_DistributionsReceivedFromConsolidatedSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReservedForFutureGrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue" id="pagp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="FourthQuarterDistributionFY2014Member" id="pagp_FourthQuarterDistributionFY2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsAtAverageRateDisclosedMaturingIn2015Member" id="pagp_ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsAtAverageRateDisclosedMaturingIn2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsAtAverageRateDisclosedMaturingIn2016Member" id="pagp_ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsAtAverageRateDisclosedMaturingIn2016Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2015Member" id="pagp_ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2016Member" id="pagp_ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsAtAverageRateDisclosedMaturingIn2016Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OxyMember" id="pagp_OxyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TotalCostToCleanUpAndRemediateSite" id="pagp_TotalCostToCleanUpAndRemediateSite" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CostToCleanUpAndRemediateSite" id="pagp_CostToCleanUpAndRemediateSite" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="InterestExpenseHedgedInventoryPurchases" id="pagp_InterestExpenseHedgedInventoryPurchases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalAccountChangeInOwnershipInterest" id="pagp_PartnersCapitalAccountChangeInOwnershipInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="SeniorUnsecured364DayRevolvingCreditFacilityMember" id="pagp_SeniorUnsecured364DayRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EightForwardStartingThirtyYearInterestRateSwapOneMember" id="pagp_EightForwardStartingThirtyYearInterestRateSwapOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EightForwardStartingThirtyYearInterestRateSwapTwoMember" id="pagp_EightForwardStartingThirtyYearInterestRateSwapTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EightForwardStartingThirtyYearInterestRateSwapThreeMember" id="pagp_EightForwardStartingThirtyYearInterestRateSwapThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsMidstreamCanadaULCMember" id="pagp_PlainsMidstreamCanadaULCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NationalEnergyBoardMember" id="pagp_NationalEnergyBoardMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConditionsImposedRelatedToRegulatoryCompliance" id="pagp_ConditionsImposedRelatedToRegulatoryCompliance" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfTerminatedInterestRateDerivatives" id="pagp_NumberOfTerminatedInterestRateDerivatives" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FirstQuarterDistributionFY2015Member" id="pagp_FirstQuarterDistributionFY2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="UnderwrittenOfferingMember" id="pagp_UnderwrittenOfferingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EightForwardStartingThirtyYearInterestRateSwapFourMember" id="pagp_EightForwardStartingThirtyYearInterestRateSwapFourMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfChangesInSharesOutstandingRollForwardTableTextBlock" id="pagp_ScheduleOfChangesInSharesOutstandingRollForwardTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentTransportationMember" id="pagp_SegmentTransportationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentFacilitiesMember" id="pagp_SegmentFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentSupplyAndLogisticsMember" id="pagp_SegmentSupplyAndLogisticsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SharesClassBMember" id="pagp_SharesClassBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SharesClassMember" id="pagp_SharesClassMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FieldOperatingCostsMember" id="pagp_FieldOperatingCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InitialMargin" id="pagp_InitialMargin" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsMember" id="pagp_ForeignExchangeForwardContractsThatExchangeCanadianDollarsForUSDollarsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsMember" id="pagp_ForeignExchangeForwardContractsThatExchangeUSDollarsForCanadianDollarsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationDerivativesEnteredInto" id="pagp_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationDerivativesEnteredInto" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="BakersfieldCrudeTerminalLLCMember" id="pagp_BakersfieldCrudeTerminalLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfAllegedRuleViolations" id="pagp_NumberOfAllegedRuleViolations" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NetShortPositionRelatedToAnticipatedSalesOfNaturalGasInventoryAndBaseGasRequirementsMember" id="pagp_NetShortPositionRelatedToAnticipatedSalesOfNaturalGasInventoryAndBaseGasRequirementsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" id="pagp_PipelineTariffActivitiesTruckingAndRelatedRevenuesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherInventoryMember" id="pagp_OtherInventoryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SecondQuarterDistributionFY2015Member" id="pagp_SecondQuarterDistributionFY2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TenForwardStartingInterestRateSwapMember" id="pagp_TenForwardStartingInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="Line901IncidentMember" id="pagp_Line901IncidentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MP29ReleaseMember" id="pagp_MP29ReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CushingTankCathodicProtectionMember" id="pagp_CushingTankCathodicProtectionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineAndHazardousMaterialsSafetyAdministrationMember" id="pagp_PipelineAndHazardousMaterialsSafetyAdministrationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ClassActionLawsuitsMember" id="pagp_ClassActionLawsuitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" id="pagp_TradeAccountsReceivableNetDisclosureOfMaximumAgeOfBalancesPastScheduledInvoiceDate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetCashPaidReceivedForTerminatedHedgingInstruments" id="pagp_NetCashPaidReceivedForTerminatedHedgingInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInOctober2025At4.65PercentMember" id="pagp_SeniorNotesDueInOctober2025At4.65PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ThirdQuarterDistributionFY2015Member" id="pagp_ThirdQuarterDistributionFY2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SevenForwardStartingInterestRateSwapMember" id="pagp_SevenForwardStartingInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="pagp_PipelineLossAllowanceCrudeOilContractNetShortPositionMember" name="PipelineLossAllowanceCrudeOilContractNetShortPositionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_PipelineLossAllowanceCrudeOilLongCallOptionMember" name="PipelineLossAllowanceCrudeOilLongCallOptionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_CashFlowHedgeGainLossToBeReclassifiedThrough2018" name="CashFlowHedgeGainLossToBeReclassifiedThrough2018" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SecuritiesLawClassActionLawsuitsMember" name="SecuritiesLawClassActionLawsuitsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_AllocatedShareBasedCompensationBenefit" name="AllocatedShareBasedCompensationBenefit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_AdditionalCommitmentsAccordianFeature" name="AdditionalCommitmentsAccordianFeature" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_SeniorNotesPublicOfferingPrice" name="SeniorNotesPublicOfferingPrice" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_TotalEstimatedCostsToCleanUpAndRemediateSite" name="TotalEstimatedCostsToCleanUpAndRemediateSite" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerMonth" name="NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerMonth" nillable="true" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_HedgedTransactionsNoLongerProbableOfOccurringMember" name="HedgedTransactionsNoLongerProbableOfOccurringMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_InitialWorstCaseEstimateMember" name="InitialWorstCaseEstimateMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_AdjustedWorstCaseEstimateMember" name="AdjustedWorstCaseEstimateMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" 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_WorstCaseEstimateAlternativeMethodologyPurgeDataMember" name="WorstCaseEstimateAlternativeMethodologyPurgeDataMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_ThirdPartyEngineeringAndConsultingFirmPreliminaryWorstCaseEstimateMember" name="ThirdPartyEngineeringAndConsultingFirmPreliminaryWorstCaseEstimateMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="pagp_NetShortPositionContractsRelatedToAnticipatedNetSalesOfInventoryMember" name="NetShortPositionContractsRelatedToAnticipatedNetSalesOfInventoryMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
