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        <ExplanationTxt>ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE UNITED STATES OF AMERICA REQUIRE PLAN MANAGEMENT TO EVALUATE TAX POSITIONS TAKEN BY THE PLAN AND RECOGNIZE A TAX LIABILITY (OR ASSET) IF THE PLAN HAS TAKEN AN UNCERTAIN POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY THE DEPARTMENT OF LABOR AND INTERNAL REVENUE SERVICE. THE PLAN ADMINISTRATOR HAS ANALYZED THE TAX POSITIONS TAKEN BY THE PLAN, AND HAS CONCLUDED THAT AS OF DECEMBER 31, 2015, THERE ARE NO UNCERTAIN POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY (OR ASSET) OR DISCLOSURE IN THE FINANCIAL STATEMENTS.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>COLLECTIVELY BARGAINED MULTIEMPLOYER PLAN OF IRON WORKERS LOCAL UNIONS WITHIN THE DISTRICT COUNCIL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD OF TRUSTEES HAS GIVEN AUTHORITY TO THE FUND ADMINISTRATOR TO REVIEW ALL TAX DOCUMENTATION BEFORE FILING.</ExplanationTxt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>NATIONAL MACHINERY &amp; CONVEYOR</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>IN</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>NEW ENGLAND BRIDGE RAIL</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
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        <LegalDomicileStateCd>NH</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>NORTH AMERICAN STEEL CORP</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>NORTHEAST STEEL ERECTORS</BusinessNameLine1Txt>
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      <IdRelatedOrgTxblCorpTrGrp>
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          <BusinessNameLine1Txt>NORTHEASTERN STEEL CORPORATION</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>NORTHWEST IRONWORKERS</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>WA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
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          <BusinessNameLine1Txt>O'BRIEN STEEL ERECTORS</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
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        <LegalDomicileStateCd>NE</LegalDomicileStateCd>
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        <LegalDomicileStateCd>CT</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>POOK DIEMONT &amp; OHL INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>PRECISION STEEL PLACERS</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>PRIME STEEL ERECTING</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>PRO-BEL ENTERPRISES LIMITED</BusinessNameLine1Txt>
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        <LegalDomicileForeignCountryCd>CA</LegalDomicileForeignCountryCd>
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          <BusinessNameLine1Txt>QUINN BROS OF ESSEX INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>R I WELDING &amp; FABR INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>RI</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>REGIS STEEL CORPORATION</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <LegalDomicileStateCd>RI</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>RHODE ISLAND REBAR INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>SPECIALTY DIVING SERVICES INC</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>STEELMAN PRODUCTION SERVICE</BusinessNameLine1Txt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>STELLAR STEEL ERECTORS LLC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>CT</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>STONE &amp; WEBSTER ENGINEERING CO</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>STORAGE COORDINATORS INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>PA</LegalDomicileStateCd>
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        <LegalDomicileStateCd>PA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>SULLIVAN &amp; MERRITT INC</BusinessNameLine1Txt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>SUNRISE ERECTORS INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>T &amp; T STEEL ERECTORS INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>THE CHEVIOT CORP</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>THE FREEMAN COMPANIES</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>THE MORRISON COMPANY INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>TIGGES WELDING</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>TRI STATE BUILDING</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>RI</LegalDomicileStateCd>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>TRI-STATE STEEL</BusinessNameLine1Txt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>TWIN CITIES IRON WORKERS</BusinessNameLine1Txt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>ULTRA LUM SERVICES LLC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>CT</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>UNERECTORS INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>UNION INSTALLATIONS LLC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>UNION STEEL ERECTORS CORPORATI</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>UNIVERSAL STEEL ERECTORS INC</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>NH</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>WALSH CONSTRUCTION CO</BusinessNameLine1Txt>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <LegalDomicileStateCd>CT</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>WEST WIND REINFORCING LLC</BusinessNameLine1Txt>
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        <RelatedOrganizationName>
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        <LegalDomicileStateCd>PA</LegalDomicileStateCd>
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        <RelatedOrganizationName>
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