Liabilities / Assets
22nd percentile
Higher debt load relative to assets than 22% of similar nonprofits.
EIN 27-3494471 • 501(c)3 • Alpena, MI
Profile
To fund and support the operations and programs of the thunder bay national marine sanctuary
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
22nd percentile
Higher debt load relative to assets than 22% of similar nonprofits.
Liabilities / Revenue
23rd percentile
Higher debt load relative to revenue than 23% of similar nonprofits.
Net Margin
87th percentile
Higher net margin than 87% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
79th percentile
Faster asset growth than 79% of similar nonprofits.
Revenue Growth
8th percentile
Faster revenue growth than 8% of similar nonprofits.
Assets
Up$1,398,357
Up $233,864 (+20%) from 2024
Liabilities
Down$1,035
Down $631 (-38%) from 2024
Net Assets
Up$1,397,322
Up $234,495 (+20%) from 2024
Revenue
Down$499,681
Down $316,738 (-39%) from 2024
Expenses
Down$283,376
Down $69,195 (-20%) from 2024
Net Income
Down$216,305
Down $247,543 (-53%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
To fund and support the operations and programs of the thunder bay national marine sanctuary. This includes providing educational opportunities at the sanctuary building and within the sanctuary boundaries.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Savings and Temporary Cash Investments | $750,432 | $890,687 | ▲ $140,255 |
| Inventories for Sale or Use | $44,611 | $48,513 | ▲ $3,902 |
| Land, Buildings, and Equipment, Net | $15,942 | $12,753 | ▼ $3,189 |
| Pledges and Grants Receivable | $7,908 | $9,083 | ▲ $1,175 |
| Cash and Non-Interest-Bearing Accounts | $-1 | - | - |
| Total Assets | $1,164,493 | $1,398,357 | ▲ $233,864 |
| Other Assets Total | $345,601 | $437,321 | ▲ $91,720 |
| Liabilities | |||
| Other Liabilities | $1,666 | $1,035 | ▼ $631 |
| Total Liabilities | $1,666 | $1,035 | ▼ $631 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $1,004,215 | $1,380,219 | ▲ $376,004 |
| Net Assets With Donor Restrictions | $158,612 | $17,103 | ▼ $141,509 |
| Total Net Assets Fund Balance | $1,162,827 | $1,397,322 | ▲ $234,495 |
| Total Liabilities and Net Assets / Fund Balance | $1,164,493 | $1,398,357 | ▲ $233,864 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Other Land Buildings | $12,753 | $30,492 | $43,245 |
| Other Assets Org | $17,103 | - | - |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $225,997 | $22,870 | ▲ $22,109 | - | $268,611 |
| 2023 | $192,944 | $10,960 | ▲ $23,844 | - | $225,997 |
| 2022 | $94,582 | $122,065 | ▼ $21,797 | - | $192,944 |
| 2021 | $86,229 | $9,510 | ▲ $4,294 | - | $94,582 |
| 2020 | $109,672 | $300 | ▲ $14,557 | - | $86,229 |
| Name | Title |
|---|---|
| Charles Wiesen | President |
| Al Moe | Director |
| Beach Hall | Director |
| Jeff Gray | Director |
| Kimberly Gildner | Director |
| Carol Shafto | Treasurer / |
| Line Item | Amount |
|---|---|
| Other Expenses | $237,221 |
| Salaries, Compensation, and Employee Benefits | $46,155 |
| Total Fundraising Expense | $1,063 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $42,853 | - | - | $42,853 |
| Insurance | $13,255 | $1,473 | - | $14,728 |
| Fees for Services Accounting | $12,370 | $1,455 | $728 | $14,553 |
| Office Expenses | $12,929 | $444 | $222 | $13,595 |
| Fees for Service Investment Mgmnt Fees | - | $4,141 | - | $4,141 |
| Payroll Taxes | $3,302 | - | - | $3,302 |
| Depreciation Depletion | $3,189 | - | - | $3,189 |
| Other Expenses | $1,424 | $1,424 | - | $2,848 |
| Travel | $1,630 | $192 | $96 | $1,918 |
| Advertising | $280 | $33 | $17 | $330 |
| Fees for Services Other | $150 | - | - | $150 |
| Total Functional Expenses | $273,151 | $9,162 | $1,063 | $283,376 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $28,895 |
| Fundraising Direct Expenses | $11,823 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Special Events/ | $28,895 | $28,895 | $11,823 | $17,072 |
| Total Events | $28,895 | $28,895 | $11,823 | $17,072 |
| Liability | Amount |
|---|---|
| Payroll Tax Payable | $885 |
| Sales Tax Payable | $150 |
“Form 990 is reviewed by board officer prior to signing.”
“Governing documents are provided upon request.”
“Endowment funds intended to subsidize future educational programming at thunder bay national marine sanctuary.”
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 FUND AND SUPPORT THE OPERATIONS AND PROGRAMS OF THE THUNDER BAY NATIONAL MARINE SANCTUARY. THIS INCLUDES PROVIDING EDUCATIONAL OPPORTUNITIES AT THE SANCTUARY BUILDING AND WITHIN THE SANCTUARY BOUNDARIES. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 17 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 33 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 280 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 330 |
| IRS990/AllOtherContributionsAmt | 0 | 156768 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | FRIENDS OF TBNMS |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine2Txt | 0 | FRIENDS OF TBNMS |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 9893568805 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 500 W FLETCHER ST |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine2Txt | 0 | 500 W FLETCHER ST |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | ALPENA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MI |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 49707 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | -1 |
| 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/CostOfGoodsSoldAmt | 0 | 144008 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 170451 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 10158 |
| IRS990/CYOtherExpensesAmt | 0 | 237221 |
| IRS990/CYOtherRevenueAmt | 0 | 68647 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 250425 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 216305 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 46155 |
| IRS990/CYTotalExpensesAmt | 0 | 283376 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1063 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 499681 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 3189 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 3189 |
| IRS990/Desc | 0 | TO SUPPORT OPERATIONS AND PROGRAMS OF THE THUNDER BAY NATIONAL MARINE SANCTUARY |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 158612 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 17103 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | true |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 16 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 160896 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 728 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 1455 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 12370 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 14553 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 150 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 150 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 4141 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 4141 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 2.00 |
| 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/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | 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/PersonNm | 0 | KIMBERLY GILDNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JEFF GRAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | BEACH HALL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | AL MOE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | CAROL SHAFTO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CHARLES WIESEN |
| 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/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/TitleTxt | 0 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TREASURER / |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | PRESIDENT |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/Form990TFiledInd | 0 | true |
| IRS990/FormationYr | 0 | 2010 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingDirectExpensesAmt | 0 | 11823 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 28895 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 1001 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 6 |
| IRS990/GovernmentGrantsAmt | 0 | 13683 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 1001 |
| IRS990/GrossReceiptsAmt | 0 | 655512 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 186454 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 6 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 1473 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 13255 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 14728 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 44611 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 48513 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 9157 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 9157 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 30492 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 15942 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 12753 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 43245 |
| IRS990/LegalDomicileStateCd | 0 | MI |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | TO FUND AND SUPPORT THE OPERATIONS AND PROGRAMS OF THE THUNDER BAY NATIONAL MARINE SANCTUARY. THIS INCLUDES PROVIDING EDUCATIONAL OPPORTUNITIES AT THE SANCTUARY BUILDING AND WITHIN THE SANCTUARY BOUNDARIES. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 1162827 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 1397322 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 1001 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 1001 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 17072 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 23690 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 42446 |
| IRS990/NetIncomeOrLossGrp/UnrelatedBusinessRevenueAmt | 0 | 18756 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 18190 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 1004215 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 1380219 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 222 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 444 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 12929 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 13595 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 345601 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 437321 |
| IRS990/OtherExpensesGrp/Desc | 0 | COGS |
| IRS990/OtherExpensesGrp/Desc | 1 | PROGRAM/EVENT EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 2 | GRANT PROGRAM EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 3 | EXHIBIT/FACILITY UPDATES |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 1424 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 112255 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 35678 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 33836 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 1424 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 112255 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 35678 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 33836 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 2848 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 1666 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 1035 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | ON-SITE FACILITY FEES - PROGR |
| IRS990/OtherRevenueMiscGrp/ExclusionAmt | 0 | 9129 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 9129 |
| IRS990/OtherRevenueTotalAmt | 0 | 9129 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 42853 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 42853 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 3302 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 3302 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 7908 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 9083 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | CHARLES WIESEN |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | EDUCATIONAL PROGRAMS |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | PROGRAM SERVICE DOCKING FEES |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | PROGRAM SERVICE REVENUE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 163695 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 71500 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 15230 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 163695 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 71500 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 15230 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PROVIDING EDUCATIONAL OPPORTUNITIES AT THE SANCTUARY BUILDING AND WITHIN THE SANCTUARY BOUNDARIES. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 112255 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 86730 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 398830 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 5019 |
| IRS990/PYOtherExpensesAmt | 0 | 262320 |
| IRS990/PYOtherRevenueAmt | 0 | 86680 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 325890 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 463848 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 90251 |
| IRS990/PYTotalExpensesAmt | 0 | 352571 |
| IRS990/PYTotalRevenueAmt | 0 | 816419 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 216305 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | true |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 163695 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 750432 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 890687 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 170451 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 398830 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 448092 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 399956 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 195653 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 1612982 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 9157 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 6425 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 5923 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 3354 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2375 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 27234 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearAmt | 0 | 383385 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus1YearAmt | 0 | 511732 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus2YearsAmt | 0 | 184820 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus3YearsAmt | 0 | 12474 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus4YearsAmt | 0 | 5931 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 1098342 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearAmt | 0 | 9129 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/TotalAmt | 0 | 9129 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 9157 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 6425 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 5923 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 3354 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 2375 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 27234 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.01000 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.01000 |
| IRS990ScheduleA/NetIncomeFromOtherUBIGrp/CurrentTaxYearAmt | 0 | 7164 |
| IRS990ScheduleA/NetIncomeFromOtherUBIGrp/CurrentTaxYearMinus1YearAmt | 0 | 11662 |
| IRS990ScheduleA/NetIncomeFromOtherUBIGrp/TotalAmt | 0 | 18826 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.98340 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.98730 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 2720453 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 562965 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 910562 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 632912 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 412430 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 201584 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 2720453 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 579286 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 928649 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 638835 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 415784 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 203959 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 2766513 |
| 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/CYEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 2365 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 225997 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 22870 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 268611 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 22109 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 1751 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 192944 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 10960 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 225997 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 23844 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 1906 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 94582 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 122065 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 192944 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | -21797 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 1270 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 86229 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 9510 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 94582 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 4181 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 4294 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 1207 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 109672 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/ContributionsAmt | 0 | 300 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 86229 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/GrantsOrScholarshipsAmt | 0 | 37093 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 14557 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | false |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | true |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 268611 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 1 | 75992 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 2 | 75615 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 3 | 17103 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | CFNEM AGENCY FUND |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 1 | PROJECT IN PROGRESS - LABYRINTH |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 2 | PROJECT IN PROGRESS - HERITAGE TRAIL |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 3 | GLMH PARK FUND |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 12753 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 30492 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 43245 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 885 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 1 | 150 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | PAYROLL TAX PAYABLE |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 1 | SALES TAX PAYABLE |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | ENDOWMENT FUNDS INTENDED TO SUBSIDIZE FUTURE EDUCATIONAL PROGRAMMING AT THUNDER BAY NATIONAL MARINE SANCTUARY. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE D, PAGE 2, PART V, LINE 4 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 12753 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 437321 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 1035 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 11823 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | SPECIAL EVENTS/ |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 28895 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 28895 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 28895 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 28895 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | 17072 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 11823 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent1Amt | 0 | 11823 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | FORM 990 IS REVIEWED BY BOARD OFFICER PRIOR TO SIGNING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | GOVERNING DOCUMENTS ARE PROVIDED UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | MI |
| 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 | 1164493 |
| IRS990/TotalAssetsEOYAmt | 0 | 1398357 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 1164493 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 1398357 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 170451 |
| IRS990/TotalEmployeeCnt | 0 | 16 |
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