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        <InvestmentEarningsOrLossesAmt>139472</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>37818</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>2087</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>1690393</EndYearBalanceAmt>
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        <BeginningYearBalanceAmt>1245100</BeginningYearBalanceAmt>
        <ContributionsAmt>18859</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>163399</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>22575</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>1691</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>1403092</EndYearBalanceAmt>
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        <BeginningYearBalanceAmt>1463733</BeginningYearBalanceAmt>
        <ContributionsAmt>33114</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>-219102</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>30828</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>1817</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>1245100</EndYearBalanceAmt>
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      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>1296302</BeginningYearBalanceAmt>
        <ContributionsAmt>37175</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>169645</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>27337</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>12052</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>1463733</EndYearBalanceAmt>
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      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>1069446</BeginningYearBalanceAmt>
        <ContributionsAmt>115473</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>154262</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>32720</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>10159</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>1296302</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.22170</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.50220</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.27610</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>true</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>false</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <InvestmentCostOrOtherBasisAmt>80000</InvestmentCostOrOtherBasisAmt>
        <OtherCostOrOtherBasisAmt>12301122</OtherCostOrOtherBasisAmt>
        <BookValueAmt>12381122</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>654576</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>57422</DepreciationAmt>
        <BookValueAmt>597154</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>99243</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>14967</DepreciationAmt>
        <BookValueAmt>84276</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>82313</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>29101</DepreciationAmt>
        <BookValueAmt>53212</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>1053862</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>200909</DepreciationAmt>
        <BookValueAmt>852953</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>13968717</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <Desc>Options and Escrow Deposits</Desc>
        <BookValueAmt>35500</BookValueAmt>
      </OtherAssetsOrgGrp>
      <OtherAssetsOrgGrp>
        <Desc>Endowment held by Community Foundation of WNC</Desc>
        <BookValueAmt>1690393</BookValueAmt>
      </OtherAssetsOrgGrp>
      <OtherAssetsOrgGrp>
        <Desc>Conservation Land Subject to Life Estate, Net</Desc>
        <BookValueAmt>529995</BookValueAmt>
      </OtherAssetsOrgGrp>
      <OtherAssetsOrgGrp>
        <Desc>Security Deposit</Desc>
        <BookValueAmt>0</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>2255888</TotalBookValueOtherAssetsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Fiscal Agent Funds Held</Desc>
        <Amt>27491</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>Contingency Payable</Desc>
        <Amt>588547</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>EBCI Contract Retainer</Desc>
        <Amt>658837</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>1274875</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>6754469</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>112460</NetUnrealizedGainsInvstAmt>
      <OtherRevenueAmt>13805</OtherRevenueAmt>
      <RevenueNotReportedAmt>126265</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>6628204</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>2087</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>53767</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>55854</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>6684058</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>5362212</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>13805</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>13805</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>5348407</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>2087</InvestmentExpensesNotIncld2Amt>
      <OtherExpensesNotIncludedAmt>459578</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>461665</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>5810072</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt II, Line 5</FormAndLineReferenceDesc>
        <ExplanationTxt>CEs are monitored by Mainsprings conservation easement monitoring staff at least annually with a report to Mainsprings files and the landowner. The handling of violations, monitoring and enforcement are covered in Mainsprings Stewardship Policy Manual.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt II, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Conservation easements purchased are expensed at cost. Conservation easements received by donation are not recorded in the organizations books.(See Schedule O for further information.)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Mainspring has three accounts at the Community Foundation of WNC. Two are for stewardship purposes (The Permanent and nonpermanent funds) and the income generated from those funds is for conservation easement stewardship, land acquisition and other conservation purposes consistent with the purpose and terms of the fund. The third account is the Mainspring Endowment Fund and funds generated from that fund can be used for operations.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Mainspring is exempt from federal income taxes under 501(c)(3) of the Internal Revenue Code. Under the Code, however,income from certain activities not related to the organizations tax-exempt purpose may be subject to taxation as unrelated business income. Mainspring had income from unrelated business activities in the 2024 fiscal year and was, therefore, required to file Federal Form 990-T (Exempt Organization Business Income Tax Return). Management anticipates that taxes payable, if any, will not be material to the financial statements. The organization believes that it has appropriate support for all tax positions taken, and as such, does not have any uncertain tax positions that are material to the financial statements.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XI, Line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental Expenses $11,124, COGS $2,681</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XI, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>Life Estate Contributions $22,001; Land Contributions $454,272.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XII, Line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>Rental Expenses $11,124, COGS $2,681</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XII, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>Easement Devaluation $459,578</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleM documentId="IRS990ScheduleM-01">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>6</ContributionCnt>
        <NoncashContributionsRptF990Amt>114141</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Sales Price</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <QualifiedContribOtherGrp>
        <ContributionCnt>0</ContributionCnt>
      </QualifiedContribOtherGrp>
      <RealEstateOtherGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>578573</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Appraisal</MethodOfDeterminingRevenuesTxt>
      </RealEstateOtherGrp>
      <Form8283ReceivedCnt>6</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt I Line 30b</FormAndLineReferenceDesc>
        <ExplanationTxt>Mainspring does not carry conservation easements as assets on its books. Donated conservation easements are not recognized in revenue.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>Line 17 Real estate - Other - Land donations are reported on this line.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="24020153">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>Per the Bylaws, the Executive Committee may exercise the powers of the Board between Board meetings, except as may be limited by the North Carolina Nonprofit Corporation Act, or may make recommendations to the Board with respect to any matters that come before it. All actions taken by the Executive Committee shall be reported to the Board of Directors at the meeting following such action.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The 990 is initially reviewed by the Finance Manager and the Executive Director. A draft is emailed to the board and presented at the Finance Committee and the Board meetings. The final is also shared once it is filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>A conflict of interest statement is handed out to the Board of Directors in attendance at the first board meeting of the new year and are asked to complete it and hand it in at that time. The statement is mailed to any board members who misses that meeting. To ensure all the completed forms are returned within one month, a designated staff member follows up with anyone who has not submitted the signed form. Staff is given a Conflict of Interest statement to complete each January, or if new to the organization at their time of hire. The Finance Manager reviews the statements. In addition, the Executive Director monitors the statements for any possible conflicts of interest.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>Mainsprings Executive Committee does an annual performance evaluation of the E.D. and uses LTA and industry benchmarks to determine salary increase. The Board of Directors uses an executive session at its February board meeting to present &amp; discuss the E.D. performance review and vote on an annual increase.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 18</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 1023 is available upon request. Forms 990 are available on the IRS website, the websites of many charity watch organizations, such as Guidestar, and MCTs website.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Governing documents, Conflict of Interest policy and audited financial statements are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt XII, Line 2c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Audit Committee directly reviews the audit.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>Sch D, Ln 3&amp;5 - Since U.S. GAAP does not provide specific guidance on the accounting treatment for conservation easements, land trust organizations in the U.S. use several different methods to account for the easements they hold. Mainspring has adopted one such method which is widely used by other land trusts. Under this method, conservation easements are not recognized as assets. Accordingly, easements received by donation are not recorded in income and easements purchased by the organization are recorded as expenses. Management believes that this method results in financial statements that most accurately reflect the organizations financial activities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Contract Labor 178616. 173472. 5144. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Professional Fees - Land Steward &amp; Annual Report 32667. 32667. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Professional Fees - Strategic Planning 26290. 72. 26218. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Professional Fees - Other 4709. 2646. 1978. 85.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Project Management Pass-through Expense 92064. 92064. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Design/Engineering 64244. 64244. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Ela Dam - Project Management 69393. 69393. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Ela Dam - Design/Build 218157. 218157. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Ela Dam - Consulting 78260. 78260. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Ela Dam Project LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>557 E Main St</AddressLine1Txt>
          <CityNm>Franklin</CityNm>
          <StateAbbreviationCd>NC</StateAbbreviationCd>
          <ZIPCd>28734</ZIPCd>
        </USAddress>
        <EIN>991910016</EIN>
        <PrimaryActivitiesTxt>River restoration</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>NC</LegalDomicileStateCd>
        <TotalIncomeAmt>615015</TotalIncomeAmt>
        <EndOfYearAssetsAmt>889247</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Mainspring Conservation Trust Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
      </IdDisregardedEntitiesGrp>
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