Liabilities / Assets
70th percentile
Higher debt load relative to assets than 70% of similar nonprofits.
EIN 04-2921546 • 501(c)4 • Braintree, MA
Profile
To assist in maintaining fort independence on castle island.during summer months, tours of the fort are offered which share the fort's history. The association is made up entirely of volunteers, some of whom serve as tour guides.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
70th percentile
Higher debt load relative to assets than 70% of similar nonprofits.
Liabilities / Revenue
70th percentile
Higher debt load relative to revenue than 70% of similar nonprofits.
Net Margin
43rd percentile
Higher net margin than 43% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
79th percentile
Faster asset growth than 79% of similar nonprofits.
Revenue Growth
99th percentile
Faster revenue growth than 99% of similar nonprofits.
Assets
Up$110,259
Up $14,964 (+16%) from 2023
Liabilities
Up$3,353
Up $280 (+9.1%) from 2023
Net Assets
Up$106,906
Up $14,684 (+16%) from 2023
Revenue
Up$148,284
Up $121,942 (+463%) from 2023
Expenses
Up$149,641
Up $115,926 (+344%) from 2023
Net Income
Up-$1,357
Up $6,016 (+82%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
To assist in maintaining fort independence on castle island.during summer months, tours of the fort are offered which share the fort's history. The association is made up entirely of volunteers.
To assist in maintaining fort independence on castle island during the summer months, tours of the fort are offered which share the forts history. The association is made up entirely of volunteers
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Cash and Non-Interest-Bearing Accounts | $118,654 | $110,259 | ▼ $8,395 |
| Total Assets | $118,654 | $110,259 | ▼ $8,395 |
| Liabilities | |||
| Deferred Revenue | $3,073 | $3,353 | ▲ $280 |
| Total Liabilities | $3,073 | $3,353 | ▲ $280 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $115,581 | $106,906 | ▼ $8,675 |
| Total Net Assets Fund Balance | $115,581 | $106,906 | ▼ $8,675 |
| Total Liabilities and Net Assets / Fund Balance | $118,654 | $110,259 | ▼ $8,395 |
| Name | Title |
|---|---|
| William P Spain | President |
| Patricia Reid | Vice President |
| Kim Staffier | Corresponding Secretary |
| Thomas Hale | Historian |
| John Haugh | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $149,641 |
| 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 |
|---|---|---|---|---|
| All Other Expenses | $91,442 | $4,162 | $0 | $95,604 |
| Other Expenses | $32,698 | $0 | $0 | $32,698 |
| Office Expenses | $2,429 | $0 | $0 | $2,429 |
| Fees for Services Accounting | $0 | $675 | $0 | $675 |
| Insurance | $500 | $0 | $0 | $500 |
| Travel | $361 | $0 | $0 | $361 |
| Total Functional Expenses | $144,744 | $4,897 | $0 | $149,641 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“The castle island association is an all-volunteer organization. The recreation committee coordinates the trips available to the membership and the historical committee is made up of members who provide tours and share the history of fort independence with the membership and our visitors.”
“The governing body is aware that form 990 has been filed and is available upon request.”
“Member trips 66759. 66759. 0. 0.”
“Postage & mailing 4012. 0. 4012. 0.”
“Printing & copying 15500. 15500. 0. 0.”
“Supplies 4192. 4192. 0. 0.”
“Operations 4554. 4554. 0. 0.”
“PERMITS 437. 437. 0. 0.”
“Donations 150. 0. 150. 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 | TO ASSIST IN MAINTAINING FORT INDEPENDENCE ON CASTLE ISLAND DURING THE SUMMER MONTHS, TOURS OF THE FORT ARE OFFERED WHICH SHARE THE FORTS HISTORY. THE ASSOCIATION IS MADE UP ENTIRELY OF VOLUNTEERS |
| IRS990/AllOtherContributionsAmt | 0 | 4105 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4162 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 91442 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 95604 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | JOHN HAUGH |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6176455559 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 170 EVERGREEN AVE |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | BRAINTREE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02184 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 118654 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 110259 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| 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 | 144148 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 117 |
| IRS990/CYOtherExpensesAmt | 0 | 149641 |
| IRS990/CYOtherRevenueAmt | 0 | 4019 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -1357 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 149641 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 148284 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 3073 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 3353 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/Desc | 0 | PURCHASE FLAGS FOR DISPLAY AT THE FORT DURING TOURS. FLAGS DISPLAYED INCLUDE ALL FIFTY STATES AND TERRITORIES, EACH BRANCH OF THE ARMED FORCES AND REPLICAS OF FLAGS USED DURING THE REVOLUTIONARY WAR |
| IRS990/DescribedInSection501c3Ind | 0 | false |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 842 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 675 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 675 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 30.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 8.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | WILLIAM P SPAIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | PATRICIA REID |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | JOHN HAUGH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | THOMAS HALE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | KIM STAFFIER |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | HISTORIAN |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | CORRESPONDING SECRETARY |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 1975 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 0 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 148284 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 500 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 500 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 117 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 140043 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MiscellaneousRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/MiscellaneousRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 4019 |
| IRS990/MiscellaneousRevenueGrp/TotalRevenueColumnAmt | 0 | 4019 |
| IRS990/MiscellaneousRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/MissionDesc | 0 | TO ASSIST IN MAINTAINING FORT INDEPENDENCE ON CASTLE ISLAND. DURING THE SUMMER MONTHS, TOURS OF THE FORT ARE OFFERED WHICH SHARE THE FORTS HISTORY. THE ASSOCIATION IS MADE UP ENTIRELY OF VOLUNTEERS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 115581 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 106906 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 115581 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 106906 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 2429 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 2429 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501cInd | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherExpensesGrp/Desc | 0 | BANK CHARGES |
| IRS990/OtherExpensesGrp/Desc | 1 | CANNON EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | DUES AND SUBSCRIPTIONS |
| IRS990/OtherExpensesGrp/Desc | 3 | FACILITIES AND EQUIPMENT |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 60 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 0 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 16619 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 695 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 32698 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 60 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 16619 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 695 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 32698 |
| IRS990/OtherRevenueTotalAmt | 0 | 4019 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | JOHN HAUGH |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PRINTING OF THE NEWSLETTER MAILED TO MEMBERS OF THE ASSOCIATION. IT INCLUDES UPDATES OF ACTIVITIES, TRIPS AND PROGRAMS TAKING PLACE AT THE FORT FOR OUR MEMBERSHIP. IT ALSO PROVIDES A SYNOPSIS OF THE ASSOCIATONS MONTHLY MEETINGS FOR THOSE NOT IN ATTENDANCE. THE NEWSLETTER IS PUBLISHED ON A QUARTERLY BASIS |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 10868 |
| IRS990/ProgSrvcAccomActy2Grp/GrantAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | ALL OTHER EVENTS INCLUDING MEMBER TRIPS |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 133034 |
| IRS990/ProgSrvcAccomActy3Grp/GrantAmt | 0 | 0 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 14582 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYOtherExpensesAmt | 0 | 33715 |
| IRS990/PYOtherRevenueAmt | 0 | 11760 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -7373 |
| IRS990/PYTotalExpensesAmt | 0 | 33715 |
| IRS990/PYTotalRevenueAmt | 0 | 26342 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -1357 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 619 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | false |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE CASTLE ISLAND ASSOCIATION IS AN ALL-VOLUNTEER ORGANIZATION. THE RECREATION COMMITTEE COORDINATES THE TRIPS AVAILABLE TO THE MEMBERSHIP AND THE HISTORICAL COMMITTEE IS MADE UP OF MEMBERS WHO PROVIDE TOURS AND SHARE THE HISTORY OF FORT INDEPENDENCE WITH THE MEMBERSHIP AND OUR VISITORS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | THE GOVERNING BODY IS AWARE THAT FORM 990 HAS BEEN FILED AND IS AVAILABLE UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | MEMBER TRIPS 66759. 66759. 0. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | POSTAGE & MAILING 4012. 0. 4012. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | PRINTING & COPYING 15500. 15500. 0. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | SUPPLIES 4192. 4192. 0. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 6 | OPERATIONS 4554. 4554. 0. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 7 | PERMITS 437. 437. 0. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 8 | DONATIONS 150. 0. 150. 0. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Pt VI, Line 10b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Pt VI, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 6 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 7 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 8 | Form 990, Part IX, Line 24e |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 118654 |
| IRS990/TotalAssetsEOYAmt | 0 | 110259 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 118654 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 110259 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 144148 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 4897 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 144744 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 149641 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 3073 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 3353 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 3073 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 3353 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 115581 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 106906 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 144744 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 4136 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 148284 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 100 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 118654 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 110259 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TravelGrp/FundraisingAmt | 0 | 0 |
| IRS990/TravelGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/TravelGrp/ProgramServicesAmt | 0 | 361 |
| IRS990/TravelGrp/TotalAmt | 0 | 361 |
| IRS990/TypeOfOrganizationTrustInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/USAddress/AddressLine1Txt | 0 | 170 EVERGREEN AVE |
| IRS990/USAddress/CityNm | 0 | BRAINTREE |
| IRS990/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/USAddress/ZIPCd | 0 | 02184 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 0 |
| IRS990/VotingMembersIndependentCnt | 0 | 0 |
| IRS990/WebsiteAddressTxt | 0 | N/A |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | JOHN HAUGH |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | TREASURER |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6178335615 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-03-15 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | CASTLE ISLAND ASSOCIATION |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | CAST |
| ReturnHeader/Filer/EIN | 0 | 042921546 |
| ReturnHeader/Filer/PhoneNum | 0 | 6178335615 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 170 EVERGREEN AVE |
| ReturnHeader/Filer/USAddress/CityNm | 0 | BRAINTREE |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 02184 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | true |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 822349494 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | EDWARD J DELUCA JR & COMPANY PC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 400 FRANKLIN STREET STE 308 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | BRAINTREE |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 02184 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 7813800596 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2025-07-07 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | EDWARD J DELUCA JR CPA |
| ReturnHeader/PreparerPersonGrp/SelfEmployedInd | 0 | X |
| ReturnHeader/ReturnTs | 0 | 2025-07-07T13:08:32-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2023-11-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2024-10-31 |
| ReturnHeader/TaxYr | 0 | 2023 |
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