Liabilities / Assets
59th percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 31-1502060 • 501(c)3 • Gates Mills, OH
Profile
To preserve and protect the land, natural environment, open space and islands of the great lakes basin for the benefit of the public.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
59th percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
61st percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
23rd percentile
Higher net margin than 23% of similar nonprofits.
Top Officer Pay
84th percentile
Higher top officer pay than 84% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
66th percentile
Faster asset growth than 66% of similar nonprofits.
Revenue Growth
26th percentile
Faster revenue growth than 26% of similar nonprofits.
Assets
Down$43,487
Down $26,176 (-38%) from 2023
Liabilities
Flat$0
Flat from 2023
Net Assets
Down$43,487
Down $26,176 (-38%) from 2023
Revenue
Down$124,911
Down $37,719 (-23%) from 2023
Expenses
Up$151,087
Up $20,796 (+16%) from 2023
Net Income
Down-$26,176
Down $58,515 (-181%) from 2023
Most recent year
2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
To preserve and protect the land, natural environment, open space and islands of the great lakes basin for the benefit of the public.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Cash and Non-Interest-Bearing Accounts | $69,663 | $43,487 | ▼ $26,176 |
| Total Assets | $69,663 | $43,487 | ▼ $26,176 |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $69,663 | $43,487 | ▼ $26,176 |
| Total Net Assets Fund Balance | $69,663 | $43,487 | ▼ $26,176 |
| Total Liabilities and Net Assets / Fund Balance | $69,663 | $43,487 | ▼ $26,176 |
| Name | Title |
|---|---|
| Andrew L Fabens Iii | President/tr |
| Alyssa Murphy | Trustee |
| J Ross Halloran | Trustee |
| Leslie H Halloran | Trustee |
| Oliver Young | Trustee |
| Sara L Mierke | Trustee |
| Sarah Mccoy | Trustee |
| Jennie Kaffen | Secretary/tr |
| Melinda M Tabor | Treasurer/tr |
| Hope Ford Murphy | Vice Pres., |
| Line Item | Amount |
|---|---|
| Grants and Similar Amounts Paid | $148,500 |
| Other Expenses | $2,587 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Foreign Grants | $148,500 | - | - | $148,500 |
| Fees for Services Accounting | - | $1,360 | - | $1,360 |
| Office Expenses | - | $1,227 | - | $1,227 |
| Total Functional Expenses | $148,500 | $2,587 | $0 | $151,087 |
| Region | Activity | Services | Offices | Employees | Spending |
|---|---|---|---|---|---|
| North America | Grantmaking | - | - | - | $148,500 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Leslie i. Halloran j. Ross halloran trustee trustee mother/son andrew fabens jennie kaffen trustee trustee father/daughter hope murphy alyssa murphy trustee trustee mother/daughter sara mierke oliver young trustee trustee mother/son”
“The members of the the organization are composed of corporate members and individual members. The corporate members are the only members entitled to vote for trustees.”
“As indicated in the response to question 6 of part vi, the members of the the organization are composed of corporate members and individual members. The corporate members are the only members entitled to vote for trustees.”
“Review is performed at the organization's annual meeting.”
“Forms 990 are available on the organization's web site, www.greatlakesbasinconservancy.org. Other governing documents are available upon request.”
“Cash donation to georgian bay biosphere reserve, 7,500.”
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 PRESERVE AND PROTECT THE LAND, NATURAL ENVIRONMENT, OPEN SPACE AND ISLANDS OF THE GREAT LAKES BASIN FOR THE BENEFIT OF THE PUBLIC. |
| IRS990/AllOtherContributionsAmt | 0 | 124911 |
| IRS990/BackupWthldComplianceInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | MELINDA M TABOR |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4403768644 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 9393 SMITH RD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | WAITE HILL |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | OH |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 44094 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 69663 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 43487 |
| 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 | 124911 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 148500 |
| IRS990/CYInvestmentIncomeAmt | 0 | 0 |
| IRS990/CYOtherExpensesAmt | 0 | 2587 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -26176 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 151087 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 124911 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/Desc | 0 | PROVIDES FUNDS FOR THE PRESERVATION AND PROTECTION OF THE LAND, OPEN SPACE AND ISLANDS OF THE GREAT LAKES BASIN FOR PUBLIC BENEFIT VIA LAND SECUREMENT. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 93500 |
| IRS990/FamilyOrBusinessRlnInd | 0 | true |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 1360 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 1360 |
| IRS990/ForeignActivitiesInd | 0 | true |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 148500 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 148500 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 0.10 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.10 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.10 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.10 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 0.10 |
| 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/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | 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/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | J ROSS HALLORAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | LESLIE H HALLORAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ANDREW L FABENS III |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JENNIE KAFFEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | SARAH MCCOY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | SARA L MIERKE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | ALYSSA MURPHY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | HOPE FORD MURPHY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MELINDA M TABOR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | OLIVER YOUNG |
| 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/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 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/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | PRESIDENT/TR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | SECRETARY/TR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VICE PRES., |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TREASURER/TR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 1997 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 10 |
| IRS990/GrantAmt | 0 | 93500 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 124911 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 10 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | OH |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | true |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO PRESERVE AND PROTECT THE LAND, NATURAL ENVIRONMENT, OPEN SPACE AND ISLANDS OF THE GREAT LAKES BASIN FOR THE BENEFIT OF THE PUBLIC. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | true |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 69663 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 43487 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 69663 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 43487 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1227 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 1227 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OwnWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | ANDREW L FABENS III |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PROVIDES FUNDS FORRESEARCH, MONITORING, AND EDUCATION PROJECTS TO SUSTAIN THE AQUATIC ECOSYSTEM AND ENVIRONMENTAL HEALTH OF THE GREAT LAKES BASIN. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 55000 |
| IRS990/ProgSrvcAccomActy2Grp/GrantAmt | 0 | 55000 |
| IRS990/ProgSrvcAccomActyOtherGrp/Desc | 0 | CASH DONATION TO GEORGIAN BAY BIOSPHERE RESERVE, 7,500. |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 162629 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 127900 |
| IRS990/PYInvestmentIncomeAmt | 0 | 1 |
| IRS990/PYOtherExpensesAmt | 0 | 2391 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 32339 |
| IRS990/PYTotalExpensesAmt | 0 | 130291 |
| IRS990/PYTotalRevenueAmt | 0 | 162630 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -26176 |
| 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 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 124911 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 162629 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 250501 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1017649 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 77896 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 1633586 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 1 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 1 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 4 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.95290 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.94090 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 1556585 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 77001 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 124911 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 162629 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 250501 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1017649 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 77896 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 1633586 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 1633590 |
| 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 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTotalExpendituresAmt | 0 | 148500 |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/RegionTxt | 0 | NORTH AMERICA |
| IRS990ScheduleF/AccountActivitiesOutsideUSGrp/TypeOfActivitiesConductedTxt | 0 | GRANTMAKING |
| IRS990ScheduleF/BoycottCountriesInd | 0 | false |
| IRS990ScheduleF/ForeignCorpOwnershipInd | 0 | false |
| IRS990ScheduleF/ForeignPartnershipInd | 0 | false |
| IRS990ScheduleF/GrantRecordsMaintainedInd | 0 | true |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 0 | 13500 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 1 | 55000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/CashGrantAmt | 2 | 80000 |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 0 | CHECK |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 1 | CHECK |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/MannerOfCashDisbursementTxt | 2 | CHECK |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 0 | ENVIRONMENT PROJECTS |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 1 | ENVIRONMENT PROJECTS |
| IRS990ScheduleF/GrantsToOrgOutsideUSGrp/PurposeOfGrantTxt | 2 | ENVIRONMENT PROJECTS |
| IRS990ScheduleF/InterestInForeignTrustInd | 0 | false |
| IRS990ScheduleF/PassiveForeignInvestmestCoInd | 0 | false |
| IRS990ScheduleF/SubtotalSpentAmt | 0 | 148500 |
| IRS990ScheduleF/SupplementalInformationDetail/ExplanationTxt | 0 | SCH. F, LINE 2: INFORMATION REGARDING THE PROCEDURES FOR MONITORING THE USE OF GRANTS OUTSIDE THE U.S.: THE ORGANIZATION IS IN DIRECT CONTACT WITH THE GOVERNING BODY OF ALL ORGANIZATIONS TO WHICH FOREIGN GRANTS ARE MADE. IN ADDITION, ACKNOWLEDGMENT LETTERS ARE RECEIVED FOR ALL GRANTS, AND ANNUAL REPORTS ARE REVIEWED TO ENSURE THE REVENUE HAS BEEN RECORDED AS GRANT INCOME IN THE ORGANIZATION'S FINANCIAL STATEMENTS. |
| IRS990ScheduleF/SupplementalInformationDetail/ExplanationTxt | 1 | NORTH AMERICA 148,500 0 |
| IRS990ScheduleF/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE F, PAGE 1, PART I, LINE 2 |
| IRS990ScheduleF/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE F, PAGE 1, PART I, LINE 3 |
| IRS990ScheduleF/Total501c3OrgCnt | 0 | 3 |
| IRS990ScheduleF/TotalSpentAmt | 0 | 148500 |
| IRS990ScheduleF/TransferToForeignCorpInd | 0 | false |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | CASH DONATION TO GEORGIAN BAY BIOSPHERE RESERVE, 7,500. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | LESLIE I. HALLORAN J. ROSS HALLORAN TRUSTEE TRUSTEE MOTHER/SON ANDREW FABENS JENNIE KAFFEN TRUSTEE TRUSTEE FATHER/DAUGHTER HOPE MURPHY ALYSSA MURPHY TRUSTEE TRUSTEE MOTHER/DAUGHTER SARA MIERKE OLIVER YOUNG TRUSTEE TRUSTEE MOTHER/SON |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE MEMBERS OF THE THE ORGANIZATION ARE COMPOSED OF CORPORATE MEMBERS AND INDIVIDUAL MEMBERS. THE CORPORATE MEMBERS ARE THE ONLY MEMBERS ENTITLED TO VOTE FOR TRUSTEES. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | AS INDICATED IN THE RESPONSE TO QUESTION 6 OF PART VI, THE MEMBERS OF THE THE ORGANIZATION ARE COMPOSED OF CORPORATE MEMBERS AND INDIVIDUAL MEMBERS. THE CORPORATE MEMBERS ARE THE ONLY MEMBERS ENTITLED TO VOTE FOR TRUSTEES. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | REVIEW IS PERFORMED AT THE ORGANIZATION'S ANNUAL MEETING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | FORMS 990 ARE AVAILABLE ON THE ORGANIZATION'S WEB SITE, WWW.GREATLAKESBASINCONSERVANCY.ORG. OTHER GOVERNING DOCUMENTS ARE AVAILABLE UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 2, PART III, LINE 4D |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 2 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PAGE 6, PART VI, LINE 6 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PAGE 6, PART VI, LINE 7A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | FORM 990, PAGE 6, PART VI, LINE 19 |
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| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
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| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | MELINDA M TABOR |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | TREASURER/TRUSTEE |
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| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-05-12 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | GREAT LAKES BASIN CONSERVANCY INC |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | GREA |
| ReturnHeader/Filer/EIN | 0 | 311502060 |
| ReturnHeader/Filer/PhoneNum | 0 | 4403768644 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | P O BOX 504 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | GATES MILLS |
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| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 24610 DETROIT ROAD SUITE 150 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | WESTLAKE |
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| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 4403489200 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2025-05-13 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | JAMES T GUZOWSKI |
| ReturnHeader/ReturnTs | 0 | 2025-05-13T14:59:23-04:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2024-12-31 |
| ReturnHeader/TaxYr | 0 | 2024 |
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