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      <CapStckTrstPrinCurrentFunds>
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        <EOY>0</EOY>
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        <EOY>201341585</EOY>
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      <InfoInScheduleOPartXI>X</InfoInScheduleOPartXI>
      <ReconcilationRevenueExpenses>6837666</ReconcilationRevenueExpenses>
      <ReconcilationOtherChanges>9009125</ReconcilationOtherChanges>
      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>0</AccountantCompileOrReview>
      <FSAudited>1</FSAudited>
      <AuditCommittee>1</AuditCommittee>
      <FinancialStatementSeparate>X</FinancialStatementSeparate>
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    </IRS990>
    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <Depreciation>201240</Depreciation>
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        <Depreciation>665820</Depreciation>
        <BookValue>117306</BookValue>
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        <OtherCostOrOtherBasis>48271</OtherCostOrOtherBasis>
        <Depreciation>24136</Depreciation>
        <BookValue>24135</BookValue>
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      <TotalOfBookValueLandBuildings>166558</TotalOfBookValueLandBuildings>
      <OtherSecurities>
        <Description>COMMON COLLECTIVE TRUST</Description>
        <BookValue>67542786</BookValue>
        <MethodOfValuation>F</MethodOfValuation>
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      <TotalOfBookValueSecurities>67542786</TotalOfBookValueSecurities>
      <OtherLiabilities>
        <Description>DUE TO BROKER</Description>
        <Amount>883177</Amount>
      </OtherLiabilities>
      <OtherLiabilities>
        <Description>DUE TO PIPE FITTERS' RETIREMENT FUND, LOCAL 597</Description>
        <Amount>9190</Amount>
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      <OtherLiabilities>
        <Description>DUE TO OTHER FUNDS</Description>
        <Amount>10404</Amount>
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      <TotalExpenses>92371145</TotalExpenses>
      <ExcessOrDeficitForYear>6837666</ExcessOrDeficitForYear>
      <NetUnrealizedGLOnInvestments>9009125</NetUnrealizedGLOnInvestments>
      <TotalAdjustments>9009125</TotalAdjustments>
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      <NetUnrealizedGainsInvestments>9009125</NetUnrealizedGainsInvestments>
      <RevenueNotRptdF990>9009125</RevenueNotRptdF990>
      <RevenueSubtotal>98956627</RevenueSubtotal>
      <InvestmentExpensesNotIncluded>252184</InvestmentExpensesNotIncluded>
      <RevenueNotRptdOnFinStmt>252184</RevenueNotRptdOnFinStmt>
      <TotalRevenuePerForm990>99208811</TotalRevenuePerForm990>
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      <ExpensesNotRptdOnFinStmt>252184</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>92371145</TotalExpensesPerForm990>
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        <Identifier>DESCRIPTION OF UNCERTAIN TAX POSITIONS UNDER FIN 48:</Identifier>
        <ReturnReference>PART X:</ReturnReference>
        <Explanation>THE PLAN FILES FORM 990, RETURN OF ORGANIZATION EXEMPT FROM INCOME TAX, AND FORM 5500, ANNUAL RETURN/REPORT OF EMPLOYEE BENEFIT PLAN. THE PLAN'S RETURNS ARE SUBJECT TO EXAMINATION BY THE INTERNAL REVENUE SERVICE UNTIL THE APPLICABLE STATUTE OF LIMITATION EXPIRES.</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
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      <SupplementalNonqualRetirePlan>0</SupplementalNonqualRetirePlan>
      <EquityBasedCompArrangement>0</EquityBasedCompArrangement>
      <Form990ScheduleJPartII>
        <NamePerson>GREGORY WATSON</NamePerson>
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        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
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        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>7741</OtherCompensationFilingOrg>
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        <DeferredCompFilingOrg>29261</DeferredCompFilingOrg>
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        <NontaxableBenefitsFilingOrg>18570</NontaxableBenefitsFilingOrg>
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        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
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      <Form990ScheduleJPartII>
        <NamePerson>PETER DRISCOLL</NamePerson>
        <BaseCompensationFilingOrg>227000</BaseCompensationFilingOrg>
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        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>8264</OtherCompensationFilingOrg>
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        <DeferredCompFilingOrg>20422</DeferredCompFilingOrg>
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        <NontaxableBenefitsFilingOrg>12887</NontaxableBenefitsFilingOrg>
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        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
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      <Form990ScheduleJPartII>
        <NamePerson>JOSEPH BARRETT</NamePerson>
        <BaseCompensationFilingOrg>145432</BaseCompensationFilingOrg>
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        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
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        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
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      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION A, LINE 8B</Identifier>
        <Explanation>THE ORGANIZATION HAS NO COMMITTEES TO WHICH IT HAS DELEGATED THE AUTHORITY TO ACT ON BEHALF OF THE GOVERNING BODY.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION B, LINE 11</Identifier>
        <Explanation>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 BOARD.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 15B</ReturnReference>
        <Explanation>SALARIES ARE REVIEWED ANNUALLY AND APPROVED BY THE BOARD OF TRUSTEES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>THE GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AT THE OFFICE OF THE FUND.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED GAINS ON INVESTMENTS: 9,009,125.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>SUBSEQUENT EVENT: EFFECTIVE JANUARY 1, 2011, THE BOARD OF TRUSTEES OF THE PIPE FITTERS' WELFARE FUND, LOCAL 597 AND THE BOARD OF TRUSTEES OF THE PLUMBERS AND STEAMFITTERS LOCAL 422 HEALTH AND WELFARE PLAN EIN 36-2307077 HAVE AGREED TO MERGE INTO PIPE FITTERS' WELFARE FUND, LOCAL 597 THAT PORTION OF THE LOCAL 422 HEALTH AND WELFARE PLAN ATTRIBUTABLE TO FORMER ELIGIBLE MEMBERS WHO HAVE BEEN TRANSFERRED INTO THE PIPE FITTERS' ASSOCIATION, LOCAL UNION 597, U.A. ON OCTOBER 1, 2009. SUBSEQUENT TO YEAR END PIPE FITTERS' WELFARE FUND, LOCAL 597 RECEIVED APPROXIMATELY $6.09 MILLION WITH AN ADDITIONAL AMOUNT DUE FOLLOWING THE CLAIMS RUN OUT FOR CLAIMS INCURRED PRIOR TO THE MERGER.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
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          <BusinessNameLine1>PIPE FITTERS' RETIREMENT FUND LOCAL 597</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>45 NORTH OGDEN AVE</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60607</ZIPCode>
        </AddressUS>
        <EIN>626105084</EIN>
        <PrimaryActivities>PROVIDES RETIREMENT BENEFITS</PrimaryActivities>
        <LegalDomicileState>IL</LegalDomicileState>
        <ExemptCodeSection>401(A)</ExemptCodeSection>
        <DirectControllingEntityName>
          <BusinessNameLine1>NOT APPLICABLE</BusinessNameLine1>
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        <ControlledOrg>0</ControlledOrg>
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      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>PIPE FITTERS' ASSOCIATION LOCAL 597 401(K) PLAN</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>45 NORTH OGDEN AVE</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60607</ZIPCode>
        </AddressUS>
        <EIN>361820310</EIN>
        <PrimaryActivities>PROVIDES RETIREMENT BENEFITS</PrimaryActivities>
        <LegalDomicileState>IL</LegalDomicileState>
        <ExemptCodeSection>401(A)</ExemptCodeSection>
        <DirectControllingEntityName>
          <BusinessNameLine1>NOT APPLICABLE</BusinessNameLine1>
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        <ControlledOrg>0</ControlledOrg>
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      <Form990ScheduleRPartII>
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          <BusinessNameLine1>PIPE FITTERS' TRAINING FUND LOCAL 597</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10850 W 187TH STREET</AddressLine1>
          <City>MOKENA</City>
          <State>IL</State>
          <ZIPCode>60448</ZIPCode>
        </AddressUS>
        <EIN>362536349</EIN>
        <PrimaryActivities>PROVIDES TRAINING TO PARTICIPANTS</PrimaryActivities>
        <LegalDomicileState>IL</LegalDomicileState>
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        <DirectControllingEntityName>
          <BusinessNameLine1>NOT APPLICABLE</BusinessNameLine1>
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      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
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      <ExchangeOfAssets>0</ExchangeOfAssets>
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      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
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        <NameOfOtherOrganization>
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        <MethodOfAmtDetermination>ACTUAL</MethodOfAmtDetermination>
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      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>PIPE FITTERS' RETIREMENT FUND LOCAL 597</BusinessNameLine1>
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        <MethodOfAmtDetermination>ACTUAL</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>PIPE FITTERS' ASSOCATION LOCAL 597 401(K) PLAN</BusinessNameLine1>
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        <MethodOfAmtDetermination>ACTUAL</MethodOfAmtDetermination>
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