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        <ProgramServicesAmt>8329</ProgramServicesAmt>
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      <FeesForServicesLegalGrp>
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        <ManagementAndGeneralAmt>1425</ManagementAndGeneralAmt>
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      <FeesForServicesAccountingGrp>
        <TotalAmt>34315</TotalAmt>
        <ManagementAndGeneralAmt>34315</ManagementAndGeneralAmt>
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        <TotalAmt>45060</TotalAmt>
        <ProgramServicesAmt>2765</ProgramServicesAmt>
        <ManagementAndGeneralAmt>42295</ManagementAndGeneralAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>116583</TotalAmt>
        <ProgramServicesAmt>979</ProgramServicesAmt>
        <ManagementAndGeneralAmt>115604</ManagementAndGeneralAmt>
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      <InformationTechnologyGrp>
        <TotalAmt>28336</TotalAmt>
        <ManagementAndGeneralAmt>28336</ManagementAndGeneralAmt>
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      <OccupancyGrp>
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        <ManagementAndGeneralAmt>118992</ManagementAndGeneralAmt>
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      <TravelGrp>
        <TotalAmt>11033</TotalAmt>
        <ProgramServicesAmt>2566</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8467</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
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        <ProgramServicesAmt>45063</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7272</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>1249</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>3740</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>33472</ManagementAndGeneralAmt>
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        <Desc>Training expense</Desc>
        <TotalAmt>369655</TotalAmt>
        <ProgramServicesAmt>369655</ProgramServicesAmt>
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        <Desc>Collection expense</Desc>
        <TotalAmt>10952</TotalAmt>
        <ManagementAndGeneralAmt>10952</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>Dues and subscriptions</Desc>
        <TotalAmt>6668</TotalAmt>
        <ManagementAndGeneralAmt>6668</ManagementAndGeneralAmt>
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        <TotalAmt>1390484</TotalAmt>
        <ProgramServicesAmt>561444</ProgramServicesAmt>
        <ManagementAndGeneralAmt>829040</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>22408</EOYAmt>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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        <EOYAmt>406732</EOYAmt>
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        <BOYAmt>421413</BOYAmt>
        <EOYAmt>429140</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-40319</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>25937</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>583549</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>491790</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>790785</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>638197</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>660854</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus4YearsAmt>583549</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>491790</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>790785</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>638197</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>660854</CurrentTaxYearAmt>
        <TotalAmt>3165175</TotalAmt>
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      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>1007</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1938</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>15270</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>18500</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>11075</CurrentTaxYearAmt>
        <TotalAmt>47790</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>3212965</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>1906266</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.98510</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.98820</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>25937</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>25937</RevenueNotReportedAmt>
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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <TotalExpensesPerForm990Amt>1390483</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FIN 48 Note from Audited Financial Statements: CCSC was granted an exemption from federal income taxes by the Internal Revenue Service pursuant to the provisions of Internal Revenue Code Section 501(c)(3). The tax-exempt purpose of CCSC and the nature in which it operates is described above. CCSC continues to operate in compliance with its tax-exempt purpose. CCSC's annual information and income tax returns filed with the federal and state governments are subject to examination generally for three years after they are filed. CCSC has adopted the requirements for accounting for uncertain tax positions and management has determined that CCSC was not required to record a liability related to uncertain tax positions as of June 30, 2024 and 2023.</ExplanationTxt>
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      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
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      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Robert Lahey</PersonNm>
        <TitleTxt>President &amp; CEO</TitleTxt>
        <BaseCompensationFilingOrgAmt>168545</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>7416</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>18080</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>226561</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The 990 was distributed to members of the Board of Directors via email as a request for review and comment to the President &amp; CEO. Thereafter, the President &amp; CEO shall serve as the authorized representative of the Chicagoland Construction Safety Council for the purpose of approving and submitting the 990 to the federal and state agencies.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Both the Board of Directors and key employees sign forms disclosing any outside interests. The Conflict of Interest Committee of Board Members then reviews all conflict of interest disclosure forms annually.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization makes it governing documents, financials statements, and conflict of interest policy available to the public upon request.</ExplanationTxt>
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</Return>