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      <LandBldgEquipBasisNetGrp>
        <BOYAmt>265140</BOYAmt>
        <EOYAmt>265140</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>359599</EOYAmt>
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      <OtherAssetsTotalGrp>
        <BOYAmt>20</BOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>811703</BOYAmt>
        <EOYAmt>813528</EOYAmt>
      </TotalAssetsGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>406090</BOYAmt>
        <EOYAmt>448438</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>405613</BOYAmt>
        <EOYAmt>365090</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>811703</BOYAmt>
        <EOYAmt>813528</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>811703</BOYAmt>
        <EOYAmt>813528</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-30698</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>28795</NetUnrlzdGainsLossesInvstAmt>
      <PriorPeriodAdjustmentsAmt>3728</PriorPeriodAdjustmentsAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>0</FSAuditedInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>46679</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>74773</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>46108</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36584</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>39761</CurrentTaxYearAmt>
        <TotalAmt>243905</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>46679</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>74773</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>46108</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>36584</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>39761</CurrentTaxYearAmt>
        <TotalAmt>243905</TotalAmt>
      </TotalCalendarYear170Grp>
      <PublicSupportTotal170Amt>243905</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>2083</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>12697</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>6</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>10080</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>13552</CurrentTaxYearAmt>
        <TotalAmt>38418</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearAmt>1372</CurrentTaxYearAmt>
        <TotalAmt>1372</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>283695</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>539</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.85970</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.90670</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleD documentId="RetDoc1039900001">
      <PreservationPublicUseInd>X</PreservationPublicUseInd>
      <ProtectionNaturalHabitatInd>X</ProtectionNaturalHabitatInd>
      <PreservationOpenSpaceInd>X</PreservationOpenSpaceInd>
      <TotalEasementsCnt>2</TotalEasementsCnt>
      <TotalAcreageCnt>12.00</TotalAcreageCnt>
      <ModifiedEasementsCnt>0</ModifiedEasementsCnt>
      <StatesEasementsHeldCnt>1</StatesEasementsHeldCnt>
      <WrittenPolicyMonitoringInd>0</WrittenPolicyMonitoringInd>
      <StaffHoursSpentEnforcementCnt>80.00</StaffHoursSpentEnforcementCnt>
      <ExpensesIncurredEnforcementAmt>3702</ExpensesIncurredEnforcementAmt>
      <Section170hRqrStsfdInd>1</Section170hRqrStsfdInd>
      <LandGrp>
        <InvestmentCostOrOtherBasisAmt>265140</InvestmentCostOrOtherBasisAmt>
        <BookValueAmt>265140</BookValueAmt>
      </LandGrp>
      <TotalBookValueLandBuildingsAmt>265140</TotalBookValueLandBuildingsAmt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION DOES NOT VALUE CONSERVATION EASEMENTS WITHIN THE FINANCIAL RECORDS</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>ALT IS A MEMBERSHIP CORPORATION ORGANIZED UNDER MASSACHUSETTS CH180.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL DUES PAYING MEMBERS ARE ELIGIBLE TO VOTE AT THE ANNUAL MEETING TO ELECT THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED IN DETAIL BY THE TREASURER AND MADE AVAILABLE TO ALL BOARD MEMBERS FOR REVIEW AND COMMENT PRIOR TO FILING,</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST. GOVERNING DOCUMENTS ARE AVAILABLE UPON REQUEST AND VIA THE MASSACHUSETTS SECRETARY OF STATE'S WEBSITE. ALT DOES NOT HAVE ITS OWN CONFLICT OF INTEREST POLICY AND RELIES ON MASSACHUSETTS ATTORNEY GENERAL GUIDELINES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>MONITORING: PROGRAM SERVICE EXPENSES 35,114. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 35,114. OTHER CONTRACTED SERVICES: PROGRAM SERVICE EXPENSES 7,446. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 7,446.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>