Liabilities / Assets
70th percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 11-6009082 • 501(c)3 • Southold, NY
Profile
The museum maintains a collection of artifacts excavated in archaelogical digs consisting of: arrow heads, other weapons, pipes, pottery, jewelry, clothing, shelter,commerce, etc. Of no commercial value. In addition, we maintain documentation of provenance, location within the museum, relevant research & scientific publications. Photographs and documentation are available on our web site. The collection is highly regarded in the scientific community as a research resource and training opportunity for students at all levels. The museum is well-known on long island and most children in the area have benefited from tours and instruction.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
70th percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
71st percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
21st percentile
Higher net margin than 21% of similar nonprofits.
Top Officer Pay
94th percentile
Higher top officer pay than 94% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
35th percentile
Faster asset growth than 35% of similar nonprofits.
Revenue Growth
13th percentile
Faster revenue growth than 13% of similar nonprofits.
Assets
Down$468,333
Down $5,503 (-1.2%) from 2024
Liabilities
Flat$0
Flat from 2024
Net Assets
Down$468,333
Down $5,503 (-1.2%) from 2024
Revenue
Down$28,445
Down $49,532 (-64%) from 2024
Expenses
Down$33,948
Down $3,519 (-9.4%) from 2024
Net Income
Down-$5,503
Down $46,013 (-114%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
The museum maintains a collection of artifacts excavated in archaelogical digs consisting of: arrow heads, other weapons, pipes, pottery, jewelry, clothing, shelter,commerce, etc. Of no commercial value. In addition, we maintain documentation of provenance, location within the museum, relevant research & scientific publications. Photographs and documentation are available on our web site. The collection is highly regarded in the scientific community as a research resource and training opportunity for students at all levels. The museum is well-known on long island and most children in the area have benefited from tours and instruction.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $473,836 | $468,333 | ▼ $5,503 |
| Land, Buildings, and Equipment, Net | $322,232 | $337,064 | ▲ $14,832 |
| Investments Other Securities | $117,693 | $113,702 | ▼ $3,991 |
| Cash and Non-Interest-Bearing Accounts | $23,911 | $7,567 | ▼ $16,344 |
| Total Assets | $473,836 | $468,333 | ▼ $5,503 |
| Other Assets Total | $10,000 | $10,000 | → $0 |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $473,836 | $468,333 | ▼ $5,503 |
| Total Liabilities and Net Assets / Fund Balance | $473,836 | $468,333 | ▼ $5,503 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Other Land Buildings | $100,000 | $300,000 | $400,000 |
| Leasehold Improvements | $234,933 | $27,454 | $262,387 |
| Equipment | $2,131 | $15,270 | $17,401 |
| Other Securities | $41,572 | - | - |
| Name | Title |
|---|---|
| Lucinda Hemmick | President |
| Joseph Wall | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $33,948 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Depreciation Depletion | $7,883 | - | - | $7,883 |
| Insurance | $7,074 | - | - | $7,074 |
| Fees for Services Other | $5,741 | - | - | $5,741 |
| Information Technology | $4,562 | - | - | $4,562 |
| Fees for Services Accounting | $1,600 | - | - | $1,600 |
| Office Expenses | $253 | - | - | $253 |
| Other Expenses | $209 | - | - | $209 |
| Travel | $93 | - | - | $93 |
| Total Functional Expenses | $33,948 | $0 | $0 | $33,948 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“No review was or will be conducted.”
“No documents available to the public”
“The museum maintains a collection of artifacts excavated in archaelogical digs consisting of: arrow heads, other weapons, pipes, pottery, jewelry, clothing, shelter,commerce, etc. Of no commercial value. In addition, we maintain documentation of provenance, location within the museum, relevant research & scientific publications. Photographs and documentation are available on our web site. The collection is highly regarded in the scientific community as a research resource and training opportunity for students at all levels. The museum is well-known on long island and most children in the area have benefited from tours and instruction.”
“Our museum is dedicated to study and education surrounding archaeology and natural history focusing on the long island area. We curate an extensive collection of artifacts from archeological excavations, along with field notes and scientific publications.”
“Education & seminars 3,357 0 0 dues & subscriptions 969 0 0 security 419 0 0 fundraising costs 976 0 0 registration fee 20 0 0 total 5,741 0 0”
“Federal tax paid 0 rounding 0”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | THE MUSEUM MAINTAINS A COLLECTION OF ARTIFACTS EXCAVATED IN ARCHAELOGICAL DIGS CONSISTING OF: ARROW HEADS, OTHER WEAPONS, PIPES, POTTERY, JEWELRY, CLOTHING, SHELTER,COMMERCE, ETC. OF NO COMMERCIAL VALUE. IN ADDITION, WE MAINTAIN DOCUMENTATION OF PROVENANCE, LOCATION WITHIN THE MUSEUM, RELEVANT RESEARCH & SCIENTIFIC PUBLICATIONS. PHOTOGRAPHS AND DOCUMENTATION ARE AVAILABLE ON OUR WEB SITE. THE COLLECTION IS HIGHLY REGARDED IN THE SCIENTIFIC COMMUNITY AS A RESEARCH RESOURCE AND TRAINING OPPORTUNITY FOR STUDENTS AT ALL LEVELS. THE MUSEUM IS WELL-KNOWN ON LONG ISLAND AND MOST CHILDREN IN THE AREA HAVE BENEFITED FROM TOURS AND INSTRUCTION. |
| IRS990/AllOtherContributionsAmt | 0 | 13559 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | JOSEPH WALL |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6317654397 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 250 CALVES NECK ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | SOUTHOLD |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 11971 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 23911 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 7567 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | true |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | false |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 14099 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 6008 |
| IRS990/CYOtherExpensesAmt | 0 | 33948 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 8338 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -5503 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 33948 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 28445 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 7883 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 7883 |
| IRS990/Desc | 0 | OUR MUSEUM IS DEDICATED TO STUDY AND EDUCATION SURROUNDING ARCHAEOLOGY AND NATURAL HISTORY FOCUSING ON THE LONG ISLAND AREA. WE CURATE AN EXTENSIVE COLLECTION OF ARTIFACTS FROM ARCHEOLOGICAL EXCAVATIONS, ALONG WITH FIELD NOTES AND SCIENTIFIC PUBLICATIONS. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DoingBusinessAsName/BusinessNameLine1Txt | 0 | SOUTHOLD INDIAN MUSEUM |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 1600 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 1600 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 5741 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 5741 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | LUCINDA HEMMICK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JOSEPH WALL |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 2534 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 12 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 2534 |
| IRS990/GrossReceiptsAmt | 0 | 28445 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 12 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 4562 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 4562 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 7074 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 7074 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 1739 |
| IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1735 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 3474 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 117693 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 113702 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 342724 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 322232 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 337064 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 679788 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 540 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE MUSEUM MAINTAINS A COLLECTION OF ARTIFACTS EXCAVATED IN ARCHAELOGICAL DIGS CONSISTING OF: ARROW HEADS, OTHER WEAPONS, PIPES, POTTERY, JEWELRY, CLOTHING, SHELTER,COMMERCE, ETC. OF NO COMMERCIAL VALUE. IN ADDITION, WE MAINTAIN DOCUMENTATION OF PROVENANCE, LOCATION WITHIN THE MUSEUM, RELEVANT RESEARCH & SCIENTIFIC PUBLICATIONS. PHOTOGRAPHS AND DOCUMENTATION ARE AVAILABLE ON OUR WEB SITE. THE COLLECTION IS HIGHLY REGARDED IN THE SCIENTIFIC COMMUNITY AS A RESEARCH RESOURCE AND TRAINING OPPORTUNITY FOR STUDENTS AT ALL LEVELS. THE MUSEUM IS WELL-KNOWN ON LONG ISLAND AND MOST CHILDREN IN THE AREA HAVE BENEFITED FROM TOURS AND INSTRUCTION. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 473836 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 468333 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 2534 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 2534 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 253 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 253 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 10000 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 10000 |
| IRS990/OtherExpensesGrp/Desc | 0 | UTILITIES |
| IRS990/OtherExpensesGrp/Desc | 1 | BUILDING MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 2 | WATER |
| IRS990/OtherExpensesGrp/Desc | 3 | RUBBISH REMOVAL |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 4476 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 1785 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 272 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 209 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 4476 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 1785 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 272 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 209 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | LUCINDA HEMMICK |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | ADMISSIONS AND TOURS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 8338 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 8338 |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 0 | OUR MUSEUM IS DEDICATED TO STUDY AND EDUCATION SURROUNDING ARCHAEOLOGY AND NATURAL HISTORY FOCUSING ON THE LONG ISLAND AREA. WE CURATE AN EXTENSIVE COLLECTION OF ARTIFACTS FROM ARCHEOLOGICAL EXCAVATIONS, ALONG WITH FIELD NOTES AND SCIENTIFIC PUBLICATIONS. |
| IRS990/ProgSrvcAccomActyOtherGrp/ExpenseAmt | 0 | 33948 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 66033 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 6185 |
| IRS990/PYOtherExpensesAmt | 0 | 37467 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 5759 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 40510 |
| IRS990/PYTotalExpensesAmt | 0 | 37467 |
| IRS990/PYTotalRevenueAmt | 0 | 77977 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -5503 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | true |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 473836 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 468333 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 14099 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 66033 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2890 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 12560 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 4580 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 100162 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 1739 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 1739 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 35986 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.98290 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 100162 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 14099 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 66033 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2890 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 12560 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 4580 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 100162 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 101901 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | true |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 2131 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 15270 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 17401 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 234933 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 27454 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 262387 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 100000 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 300000 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 400000 |
| IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt | 0 | 72130 |
| IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt | 1 | 41572 |
| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 0 | VANGUARD ADMIRAL FUND |
| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 1 | VANGUARD INHERITED IRA |
| IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd | 0 | C |
| IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd | 1 | C |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | false |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 337064 |
| IRS990ScheduleD/TotalBookValueSecuritiesAmt | 0 | 113702 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | false |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE MUSEUM MAINTAINS A COLLECTION OF ARTIFACTS EXCAVATED IN ARCHAELOGICAL DIGS CONSISTING OF: ARROW HEADS, OTHER WEAPONS, PIPES, POTTERY, JEWELRY, CLOTHING, SHELTER,COMMERCE, ETC. OF NO COMMERCIAL VALUE. IN ADDITION, WE MAINTAIN DOCUMENTATION OF PROVENANCE, LOCATION WITHIN THE MUSEUM, RELEVANT RESEARCH & SCIENTIFIC PUBLICATIONS. PHOTOGRAPHS AND DOCUMENTATION ARE AVAILABLE ON OUR WEB SITE. THE COLLECTION IS HIGHLY REGARDED IN THE SCIENTIFIC COMMUNITY AS A RESEARCH RESOURCE AND TRAINING OPPORTUNITY FOR STUDENTS AT ALL LEVELS. THE MUSEUM IS WELL-KNOWN ON LONG ISLAND AND MOST CHILDREN IN THE AREA HAVE BENEFITED FROM TOURS AND INSTRUCTION. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | OUR MUSEUM IS DEDICATED TO STUDY AND EDUCATION SURROUNDING ARCHAEOLOGY AND NATURAL HISTORY FOCUSING ON THE LONG ISLAND AREA. WE CURATE AN EXTENSIVE COLLECTION OF ARTIFACTS FROM ARCHEOLOGICAL EXCAVATIONS, ALONG WITH FIELD NOTES AND SCIENTIFIC PUBLICATIONS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | NO REVIEW WAS OR WILL BE CONDUCTED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | NO DOCUMENTS AVAILABLE TO THE PUBLIC |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | EDUCATION & SEMINARS 3,357 0 0 DUES & SUBSCRIPTIONS 969 0 0 SECURITY 419 0 0 FUNDRAISING COSTS 976 0 0 REGISTRATION FEE 20 0 0 TOTAL 5,741 0 0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | FEDERAL TAX PAID 0 ROUNDING 0 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990 - ORGANIZATION'S MISSION |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 2, PART III, LINE 4D |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART IX, LINE 11G |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | FORM 990, PART XI, LINE 9 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 473836 |
| IRS990/TotalAssetsEOYAmt | 0 | 468333 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 473836 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 468333 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 14099 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 33948 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 33948 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 473836 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 468333 |
| IRS990/TotalOtherProgSrvcExpenseAmt | 0 | 33948 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 33948 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 8338 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 4273 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 10073 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 28445 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 473836 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 468333 |
| IRS990/TravelGrp/ProgramServicesAmt | 0 | 93 |
| IRS990/TravelGrp/TotalAmt | 0 | 93 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | false |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/USAddress/AddressLine1Txt | 0 | 3060 LITTLE NECK RD |
| IRS990/USAddress/CityNm | 0 | CUTCHOGUE |
| IRS990/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/USAddress/ZIPCd | 0 | 11935 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 12 |
| IRS990/VotingMembersIndependentCnt | 0 | 12 |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | JOSEPH WALL |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | TREASURER |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6317654397 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2026-04-20 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | THE INCORPORATED LONG ISLAND |
| ReturnHeader/Filer/BusinessName/BusinessNameLine2Txt | 0 | CHAPTER OF THE NY STATE ARCHAEOLOGI |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | INCO |
| ReturnHeader/Filer/EIN | 0 | 116009082 |
| ReturnHeader/Filer/PhoneNum | 0 | 6317654397 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | PO BOX 268 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | SOUTHOLD |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | NY |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 11971 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 113448615 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | EIERMAN & SCHULKEN ASSOC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 159-47 102ND STREET |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | HOWARD BEACH |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | NY |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 114143516 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 7188351978 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2026-04-20 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | ROBERT EIERMAN CPA |
| ReturnHeader/ReturnTs | 0 | 2026-04-22T14:53:21-04:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2025-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-12-31 |
| ReturnHeader/TaxYr | 0 | 2025 |
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