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        <Desc>Untold Stories Grand Portage: Our work on inclusive cultural interpretation and education also made important progress. In partnership with the Grand Portage Band, we raised resources for, helped develop, and are poised to install an interpretive exhibit at the Band's Hat Point Ferry Building, a busy entry point for travel between Grand Portage and Isle Royale. We sponsored another successful year of Agaaming Aki (the land across the water) an experiential learning program involving the Grand Portage and Red Cliff Bands, Grand Portage National Monument, 1854 Treaty Authority, and NPLSF. NPLSF also sponsored Rendezvous Days at Grand Portage and the Lutsong Music Festival.</Desc>
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        <ManagementAndGeneralAmt>1025</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>6500</ProgramServicesAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>12832</EOYAmt>
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      <DeferredRevenueGrp>
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        <EOYAmt>13376</EOYAmt>
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      <TaxExemptBondLiabilitiesGrp>
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      <EscrowAccountLiabilityGrp>
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      <LoansFromOfficersDirectorsGrp>
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      <UnsecuredNotesLoansPayableGrp>
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        <EOYAmt>26208</EOYAmt>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>385510</BOYAmt>
        <EOYAmt>230042</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-169038</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>0</NetUnrlzdGainsLossesInvstAmt>
      <DonatedServicesAndUseFcltsAmt>0</DonatedServicesAndUseFcltsAmt>
      <InvestmentExpenseAmt>0</InvestmentExpenseAmt>
      <PriorPeriodAdjustmentsAmt>0</PriorPeriodAdjustmentsAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>1</AccountantCompileOrReviewInd>
      <AcctCompileOrReviewBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <FSAuditedInd>0</FSAuditedInd>
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      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
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        <CurrentTaxYearMinus3YearsAmt>429979</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>381314</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>396249</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>355550</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>58</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>0</CurrentTaxYearAmt>
        <TotalAmt>495</TotalAmt>
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      <Total509Grp>
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        <CurrentTaxYearMinus3YearsAmt>429979</CurrentTaxYearMinus3YearsAmt>
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        <TotalAmt>1672396</TotalAmt>
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      <SubstAndDsqlfyPrsnsTotGrp>
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        <CurrentTaxYearMinus2YearsAmt>0</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>0</CurrentTaxYearMinus1YearAmt>
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        <TotalAmt>0</TotalAmt>
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      <PublicSupportTotal509Amt>1672396</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
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        <CurrentTaxYearAmt>5669</CurrentTaxYearAmt>
        <TotalAmt>7401</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
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        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>NPLSF launched a major new initiative in 2025: the Northern Moose Alliance, a partnership effort with the Minnesota Department of Natural Resources, 1854 Treaty Authority, and Grand Portage Band of Lake Superior Chippewa. NPLSF is hosting a Wildlife Biologist carrying out research on young moose and is leading public engagement and communications efforts to build a strong and active constituency for actions, such as habitat improvement, that will help our region's struggling moose populations.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of the 990 is distributed to the entire Board to review and approve before it is filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each Board member must annually fill out a conflict of interest form. If a conflict were to arise during the year, it is the Board member's responsibility to bring the conflict to the Board to discuss and determine whether it is allowable or whether the Board member should step down.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The 990, financial statements, and conflict of interest policy is made available upon request in electronic form.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Project related design and contract services; consulting services</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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