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        <Desc>OTHER</Desc>
        <BusinessCd>900099</BusinessCd>
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        <ExclusionAmt>12912</ExclusionAmt>
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      <BenefitsToMembersGrp>
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        <TotalAmt>206672</TotalAmt>
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      <PayrollTaxesGrp>
        <TotalAmt>110020</TotalAmt>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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      <RtnEarnEndowmentIncmOthFndsGrp>
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        <EOYAmt>338708483</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>332752320</BOYAmt>
        <EOYAmt>338708483</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>342652079</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-9386204</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>15342367</NetUnrlzdGainsLossesInvstAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <DepreciationAmt>1840813</DepreciationAmt>
        <BookValueAmt>2586237</BookValueAmt>
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      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>1300090</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>717799</DepreciationAmt>
        <BookValueAmt>582291</BookValueAmt>
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      <OtherLandBuildingsGrp>
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        <BookValueAmt>6793</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>3175321</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>COMMON COLLECTIVE TRUST</Desc>
        <BookValueAmt>110184083</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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        <Desc>DUE TO BROKER</Desc>
        <Amt>967161</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>RECIPROCAL CONTRIBUTIONS PAYABLE</Desc>
        <Amt>198293</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>LOCKBOX CONTRIBUTIONS NOT YET REMITTED</Desc>
        <Amt>601043</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>DUE TO RELATED ORGANIZATIONS - NET</Desc>
        <Amt>1971102</Amt>
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      <TotalLiabilityAmt>3737599</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>169349090</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>15342367</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedFinclStmtAmt>405822</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>154412545</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>163392927</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>163392927</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>405822</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>405822</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>163798749</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE UNITED STATES OF AMERICA REQUIRE THE PLAN TO EVALUATE TAX POSITIONS TAKEN BY THE PLAN AND RECOGNIZE A TAX LIABILITY IF THE PLAN HAS TAKEN AN UNCERTAIN POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY TAX AUTHORITIES. THE PLAN IS SUBJECT TO ROUTINE AUDITS BY TAXING JURISDICTIONS; HOWEVER, THERE ARE CURRENTLY NO AUDITS FOR ANY TAX PERIODS IN PROGRESS.</ExplanationTxt>
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      <SupplementalNonqualRtrPlanInd>1</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
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        <PersonNm>KEVIN MORRISSEY</PersonNm>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>139672</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>24307</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>454265</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CHRISTOPHER HERNANDEZ</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>208610</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>10017</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>114612</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>24307</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>357546</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>THOMAS KOTEL</PersonNm>
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        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>2244</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>112855</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>24307</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>342608</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MICHAEL MALONEY</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <BaseCompensationFilingOrgAmt>215545</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>21955</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>3835</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>600</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>68093</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>7134</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>24307</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>311780</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>29689</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>NICHOLE LINHARDT</PersonNm>
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        <BaseCompensationFilingOrgAmt>224231</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>10497</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>24625</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>18926</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>278279</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
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        <FormAndLineReferenceDesc>FORM 990, SCHEDULE J, PART 1, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>A TRUSTEE PARTICIPATES IN A 457B PENSION PLAN. $18,000 WAS CONTRIBUTED TO THE PLAN ON HIS BEHALF DURING 2020.</ExplanationTxt>
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    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS NO COMMITTEES TO WHICH IT HAS DELEGATED THE AUTHORITY TO ACT ON BEHALF OF THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY AN INDEPENDENT ACCOUNTING FIRM AND PROVIDED TO THE ADMINISTRATOR OF THE PLAN. THE ADMINISTRATOR HAS BEEN GIVEN THE AUTHORITY BY THE BOARD OF TRUSTEES TO REVIEW THE FORM 990 PRIOR TO FILING WITH THE INTERNAL REVENUE SERVICE. SUBSEQUENTLY A COPY OF THE FORM IS PROVIDED TO THE ENTIRE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>SALARIES ARE REVIEWED ANNUALLY AND APPROVED BY THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AT THE OFFICE OF THE FUND.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII, SECTION A, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ADMINISTRATOR AND ONE TRUSTEE ALSO PROVIDE SERVICES TO OTHER FUNDS AFFILIATED WITH THE REPORTING ORGANIZATION. THE REPORTING ORGANIZATION IS REIMBURSED BY THE AFFILIATED FUNDS FOR THEIR SHARE OF THESE SALARIES AND RELATED EXPENSES. THE AVERAGE HOURS REPORTED ON LINE 1A IS THE WEEKLY HOURS DEDICATED TO THE REPORTING ORGANIZATION. THE TOTAL COMPENSATION REPORTED ON LINE 1A IS THE TOTAL COMPENSATION PAID TO THESES INDIVIDUALS BY THE REPORTING ORGANIZATION AND REPORTED ON FORM W-2 PREPARED BY THE REPORTING ORGANIZATION.</ExplanationTxt>
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          <BusinessNameLine1Txt>PIPE FITTERS' RETIREMENT FUND LOCAL 597</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>45 NORTH OGDEN</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60607</ZIPCd>
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          <AddressLine1Txt>45 NORTH OGDEN</AddressLine1Txt>
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          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60607</ZIPCd>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>PIPEFITTERS TRAINING FUND LOCAL 597</BusinessNameLine1Txt>
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          <AddressLine1Txt>10850 W 187TH ST</AddressLine1Txt>
          <CityNm>MOKENA</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
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        </USAddress>
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        <PrimaryActivitiesTxt>PROVIDES TRAINING TO PARTICIPANTS</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
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      </IdRelatedTaxExemptOrgGrp>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>PIPE TRADES TRUST</BusinessNameLine1Txt>
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