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        <RelatedOrExemptFuncIncomeAmt>3061</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>OTHER INCOME</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1436</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1436</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>1436</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>152228</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>78568</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>9080</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>49</TotalAmt>
        <ProgramServicesAmt>25</ProgramServicesAmt>
        <ManagementAndGeneralAmt>24</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>67783</TotalAmt>
        <ProgramServicesAmt>33891</ProgramServicesAmt>
        <ManagementAndGeneralAmt>33892</ManagementAndGeneralAmt>
      </OtherSalariesAndWagesGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>4812</TotalAmt>
        <ProgramServicesAmt>2406</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2406</ManagementAndGeneralAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>5300</TotalAmt>
        <ProgramServicesAmt>2598</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2702</ManagementAndGeneralAmt>
      </PayrollTaxesGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>12600</TotalAmt>
        <ManagementAndGeneralAmt>12600</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>1602</TotalAmt>
        <ProgramServicesAmt>801</ProgramServicesAmt>
        <ManagementAndGeneralAmt>801</ManagementAndGeneralAmt>
      </FeesForServicesOtherGrp>
      <OfficeExpensesGrp>
        <TotalAmt>4776</TotalAmt>
        <ManagementAndGeneralAmt>4776</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>1652</TotalAmt>
        <ManagementAndGeneralAmt>1652</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>9426</TotalAmt>
        <ProgramServicesAmt>6315</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3111</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>COLLECTION CARE</Desc>
        <TotalAmt>34775</TotalAmt>
        <ProgramServicesAmt>34775</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>UTILITIES</Desc>
        <TotalAmt>25255</TotalAmt>
        <ProgramServicesAmt>22730</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2525</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MAINTENANCE</Desc>
        <TotalAmt>9641</TotalAmt>
        <ProgramServicesAmt>9641</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>TRASH COLLECTION</Desc>
        <TotalAmt>6111</TotalAmt>
        <ManagementAndGeneralAmt>6111</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>21449</TotalAmt>
        <ProgramServicesAmt>14221</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7228</ManagementAndGeneralAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>205231</TotalAmt>
        <ProgramServicesAmt>127403</ProgramServicesAmt>
        <ManagementAndGeneralAmt>77828</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>28210</BOYAmt>
        <EOYAmt>106386</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>289321</BOYAmt>
        <EOYAmt>161856</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>147</BOYAmt>
        <EOYAmt>56</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>26922</BOYAmt>
        <EOYAmt>19643</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>4844</BOYAmt>
        <EOYAmt>4427</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>466432</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>456683</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>11401</BOYAmt>
        <EOYAmt>9749</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>638351</BOYAmt>
        <EOYAmt>710851</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>999196</BOYAmt>
        <EOYAmt>1012968</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>7657</BOYAmt>
        <EOYAmt>74432</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>7657</BOYAmt>
        <EOYAmt>74432</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>910003</BOYAmt>
        <EOYAmt>908441</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>81536</BOYAmt>
        <EOYAmt>30095</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>991539</BOYAmt>
        <EOYAmt>938536</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>999196</BOYAmt>
        <EOYAmt>1012968</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-53003</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>1</AccountantCompileOrReviewInd>
      <AcctCompileOrReviewBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </AcctCompileOrReviewBasisGrp>
      <FSAuditedInd>0</FSAuditedInd>
      <AuditCommitteeInd>0</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>59138</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>260149</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>69052</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>90662</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>64580</CurrentTaxYearAmt>
        <TotalAmt>543581</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>59138</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>260149</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>69052</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>90662</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>64580</CurrentTaxYearAmt>
        <TotalAmt>543581</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>30878</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>512703</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>4405</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>2567</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>388</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>4680</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>9080</CurrentTaxYearAmt>
        <TotalAmt>21120</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearAmt>1436</CurrentTaxYearAmt>
        <TotalAmt>1436</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>566137</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>214293</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.90560</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.90310</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <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>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>0</SolicitedAssetsSaleInd>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>4671</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4302</DepreciationAmt>
        <BookValueAmt>369</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>414140</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>414140</DepreciationAmt>
        <BookValueAmt>0</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>39232</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>37082</DepreciationAmt>
        <BookValueAmt>2150</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>8389</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1159</DepreciationAmt>
        <BookValueAmt>7230</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>9749</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <Desc>INTERACTIVE EXHIBITS</Desc>
        <BookValueAmt>54852</BookValueAmt>
      </OtherAssetsOrgGrp>
      <OtherAssetsOrgGrp>
        <Desc>TROLLEY CARS</Desc>
        <BookValueAmt>655999</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>710851</TotalBookValueOtherAssetsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM COLLECTIONS SUPPORT THE MISSION STATEMENT. THE SEVEN RAIL CARS IN THE WASHINGTON STREET CAR COLLECTION ENABLE EFFECTIVE INTERPRETATION OF ELECTRIC STREET RAILWAY VEHICLES IN THE NATION'S CAPITAL. THE TWELVE RAIL CARS IN THE AMERICAN TROLLEY AND INTERNATIONAL STREETCAR COLLECTIONS SUPPLEMENT THE WASHINGTON COLLECTION IN PRESENTING THE DEVELOPMENT OF ELECTRIC STREET RAILWAY TECHNOLOGY ON A BROADER SCALE WITH TYPES OF VEHICLES THAT WERE OPERATED ELSEWHERE, BUT NOT PART OF THE OPERATING SYSTEM IN THE REGION. THE MUSEUM OPERATES THESE CARS ON ITS DEMONSTRATION RAILWAY, THE ULTIMATE INTERACTIVE MUSEUM EXPERIENCE. WHILE STREETCAR COLLECTIONS SERVE AS THE MUSEUM'S MOST VISIBLE ARTIFACTS, THE MUSEUM ALSO OWNS EXTENSIVE TROLLEY EPHEMERA, PHOTOGRAPH, POST CARD, AND MANUSCRIPT COLLECTIONS. RESEARCHERS USE THESE COLLECTIONS IN THE PREPARATION OF PUBLICATIONS LIKE CAPITAL TRANSIT: WASHINGTON'S STREET CARS: THE FINAL ERA 1933-1962, WHICH THE MUSEUM PUBLISHED IN NOVEMBER, 2001.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MUSEUM HAS RECEIVED A TAX DETERMINATION LETTER FROM THE INTERNAL REVENUE SERVICE STATING THAT IT QUALIFIES UNDER THE PROVISIONS OF SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND IS THUS EXEMPT FROM FEDERAL AND STATE INCOME TAXES. THE MUSEUM DOES NOT HAVE ANY UNRELATED BUSINESS INCOME AND ACCORDINGLY, DOES NOT HAVE ANY UNCERTAIN TAX POSITIONS THAT REQUIRE RECOGNITION OR DISCLOSURE IN THE FINANCIAL STATEMENTS. THE MUSEUM'S MANAGEMENT EVALUATES TAX POSITIONS AND RECOGNIZES A TAX LIABILITY IF THE MUSEUM HAS TAKEN AN UNCERTAIN POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY THE INTERNAL REVENUE SERVICE. THE MUSEUM'S MANAGEMENT HAS ANALYZED ITS TAX POSITIONS, AND HAS CONCLUDED THAT AS OF OCTOBER 31, 2023 AND 2022, THERE ARE NO UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE RECOGNITION OR DISCLOSURE. THE MUSEUM IS SUBJECT TO ROUTINE AUDITS BY TAXING JURISDICTIONS; HOWEVER, THERE ARE CURRENTLY NO AUDITS FOR ANY TAX PERIODS IN PROGRESS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUSTEES WERE PROVIDED A DRAFT OF FORM 990 FOR REVIEW BEFORE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS FORM 1023, FORM 990, GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 24E</FormAndLineReferenceDesc>
        <ExplanationTxt>PUBLIC RELATIONS: PROGRAM SERVICE EXPENSES 4,897. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 4,897. RAILWAY: PROGRAM SERVICE EXPENSES 4,223. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 4,223. MEMBERSHIP SERVICES: PROGRAM SERVICE EXPENSES 3,153. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 3,153. MISCELANEOUS: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 2,048. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 2,048. MUSEUM SHOP: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 1,907. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,907. SECURITY: PROGRAM SERVICE EXPENSES 900. MANAGEMENT AND GENERAL EXPENSES 824. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,724. GROUNDS: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 1,508. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,508. EDUCATION: PROGRAM SERVICE EXPENSES 1,048. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 1,048. TELEPHONE: PROGRAM SERVICE EXPENSES 0. MANAGEMENT AND GENERAL EXPENSES 941. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 941.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
