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        <OtherExpendituresAmt>1480137</OtherExpendituresAmt>
        <EndYearBalanceAmt>34503165</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>30503872</BeginningYearBalanceAmt>
        <ContributionsAmt>2712705</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>3979998</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>419577</OtherExpendituresAmt>
        <EndYearBalanceAmt>36776998</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>29847621</BeginningYearBalanceAmt>
        <ContributionsAmt>1036252</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>1772497</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>2152498</OtherExpendituresAmt>
        <EndYearBalanceAmt>30503872</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>32093779</BeginningYearBalanceAmt>
        <ContributionsAmt>1061535</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>-1058370</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>2249323</OtherExpendituresAmt>
        <EndYearBalanceAmt>29847621</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.50000</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.34000</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.16000</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>2357839</OtherCostOrOtherBasisAmt>
        <BookValueAmt>2357839</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>12702466</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4372510</DepreciationAmt>
        <BookValueAmt>8329956</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>3120573</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>2782544</DepreciationAmt>
        <BookValueAmt>338029</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>325242</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>238566</DepreciationAmt>
        <BookValueAmt>86676</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>11112500</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>INVESTMENT IN LIMITED PARTNERSHIP</Desc>
        <BookValueAmt>9074316</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>9074316</TotalBookValueSecuritiesAmt>
      <OtherAssetsOrgGrp>
        <Desc>BENEFICIAL INTEREST IN PERPETUAL TRUST</Desc>
        <BookValueAmt>10447650</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>10447650</TotalBookValueOtherAssetsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>PENSION BENEFIT OBLIGATION</Desc>
        <Amt>3981420</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>3981420</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>10231995</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>4301764</NetUnrealizedGainsInvstAmt>
      <OtherRevenueAmt>-831206</OtherRevenueAmt>
      <RevenueNotReportedAmt>3470558</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>6761437</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>67538</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>67538</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>6828975</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>7855537</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>93404</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>93404</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>7762133</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>67538</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>67538</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>7829671</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S ENDOWMENT CONSISTS OF INDIVIDUAL FUNDS ESTABLISHED FOR A VARIETY OF PURPOSES. ITS ENDOWMENT INCLUDES BOTH DONOR-RESTRICTED FUNDS AND FUNDS DESIGNATED BY THE BOARD OF DIRECTORS TO FUNCTION AS ENDOWMENTS. AS REQUIRED BY GENERALLY ACCEPTED ACCOUNTING PRINCIPLES, NET ASSETS ASSOCIATED WITH ENDOWMENT FUNDS, INCLUDING FUNDS DESIGNATED BY THE BOARD OF DIRECTORS TO FUNCTION AS ENDOWMENTS, ARE CLASSIFIED AND REPORTED BASED ON THE EXISTENCE OR ABSENCE OF DONOR-IMPOSED RESTRICTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION COMPLIES WITH FASB ASC 740 - ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES. FOR THE YEARS ENDED DECEMBER 31, 2019 AND 2018, THE CORPORATION HAS DETERMINED IT DID NOT HAVE A MATERIAL TAX LIABILITY FOR UNCERTAIN TAX POSITIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>PENSION CHANGES EXCLUDING NET PERIODIC PENSION COST -924,610. FUNDRAISING EXPENSES NETTED WITH REVENUE 93,404.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISING EXPENSES NETTED WITH REVENUE 93,404.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>CENTRAL AMERICA AND THE CARIBBEAN</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>GRANTS TO RECIPIENTS</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>157040</RegionTotalExpendituresAmt>
      </AccountActivitiesOutsideUSGrp>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>157040</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>157040</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>CENTRAL AMERICA AND THE CARIBBEAN</RegionTxt>
        <PurposeOfGrantTxt>TO SUPPORT TROPICAL RESEARCH PROGRAMS</PurposeOfGrantTxt>
        <CashGrantAmt>157040</CashGrantAmt>
        <MannerOfCashDisbursementTxt>WIRE TRANSFER</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsToOrgOutsideUSGrp>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S MANAGEMENT MONITORS USE OF GRANT FUNDS TO ASSURE COMPLIANCE WITH PROGRAM OBJECTIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
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      <FundraisingEventInformationGrp>
        <Event1Nm>WATER'S EDGE</Event1Nm>
        <GrossReceiptsEvent1Amt>264787</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>243957</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>20830</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>58378</OtherDirectExpensesEvent1Amt>
        <Event2Nm>GOLF OUTING</Event2Nm>
        <GrossReceiptsEvent2Amt>88410</GrossReceiptsEvent2Amt>
        <CharitableContriEvent2Amt>64160</CharitableContriEvent2Amt>
        <GrossRevenueEvent2Amt>24250</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>31067</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>5</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>35976</GrossReceiptsOtherEventsAmt>
        <CharitableContriOtherEventsAmt>21899</CharitableContriOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>14077</GrossRevenueOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>3959</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>389173</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>330016</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>59157</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>93404</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>93404</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-34247</NetIncomeSummaryAmt>
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    </IRS990ScheduleG>
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      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>AZAVEA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>990 SPRING GARDEN ST 5</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19123</ZIPCd>
        </USAddress>
        <RecipientEIN>233039470</RecipientEIN>
        <CashGrantAmt>87895</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BERKS COUNTY CONSERVATION DISTRICT</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1238 COUNTY WELFARE ROAD SUITE 200</AddressLine1Txt>
          <CityNm>LEESPORT</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19533</ZIPCd>
        </USAddress>
        <RecipientEIN>231641613</RecipientEIN>
        <IRCSectionDesc>STATE OF PA</IRCSectionDesc>
        <CashGrantAmt>23528</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>COVER CROP COACHING LLC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>679 HILLDALE RD</AddressLine1Txt>
          <CityNm>HOLTWOOD</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>17532</ZIPCd>
        </USAddress>
        <RecipientEIN>812962292</RecipientEIN>
        <CashGrantAmt>55358</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DREXEL UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3141 CHESTNUT ST</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19104</ZIPCd>
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        <RecipientEIN>231352630</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
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        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>LIMNOTECH</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1015 18TH ST NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20036</ZIPCd>
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        <RecipientEIN>382084136</RecipientEIN>
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        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>MILLERSVILLE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>40 DILWORTH RD</AddressLine1Txt>
          <CityNm>MILLERSVILLE</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
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        <RecipientEIN>232397926</RecipientEIN>
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        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>PENNSYLVANIA NO TILL ALLIANCE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2215 FOREST HILLS DRIVE SUITE 39</AddressLine1Txt>
          <CityNm>HARRISBURG</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>17112</ZIPCd>
        </USAddress>
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        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WASHINGTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ROOSEVELT WAY NE</AddressLine1Txt>
          <CityNm>SEATTLE</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98115</ZIPCd>
        </USAddress>
        <RecipientEIN>916001537</RecipientEIN>
        <IRCSectionDesc>STATE OF WASHINGTON</IRCSectionDesc>
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        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UTAH STATE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>OLD MAIN HILL</AddressLine1Txt>
          <CityNm>LOGAN</CityNm>
          <StateAbbreviationCd>UT</StateAbbreviationCd>
          <ZIPCd>84322</ZIPCd>
        </USAddress>
        <RecipientEIN>876000528</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
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        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>TWO ROADS CONSULTING CORP</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>6 E ALDINE DR</AddressLine1Txt>
          <CityNm>HOCKESSIN</CityNm>
          <StateAbbreviationCd>DE</StateAbbreviationCd>
          <ZIPCd>19707</ZIPCd>
        </USAddress>
        <RecipientEIN>833437438</RecipientEIN>
        <CashGrantAmt>20000</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>WATER QUALITY RESEARCH AND TRAINING ACTIVITIES</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>6</Total501c3OrgCnt>
      <TotalOtherOrgCnt>4</TotalOtherOrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S MANAGEMENT MONITORS USE OF GRANT FUNDS TO ASSURE COMPLIANCE WITH PROGRAM OBJECTIVES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
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      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
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        <PersonNm>DAVID B ARSCOTT PHD</PersonNm>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>18735</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>17035</NontaxableBenefitsFilingOrgAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KRISTINE LISI</PersonNm>
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        <DeferredCompensationFlngOrgAmt>16942</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsFilingOrgAmt>15407</NontaxableBenefitsFilingOrgAmt>
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        <TotalCompensationFilingOrgAmt>170649</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JOHN JACKSON</PersonNm>
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        <NontaxableBenefitsFilingOrgAmt>15798</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>174984</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MATTHEW EHRHART</PersonNm>
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        <BaseCompensationFilingOrgAmt>128000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>15680</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>14259</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>157939</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MELINDA DANIELS</PersonNm>
        <TitleTxt>ASSOCIATE RESEARCH SCIENTIST</TitleTxt>
        <BaseCompensationFilingOrgAmt>124314</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>15229</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>13849</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>153392</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="RetDoc1053100001">
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>CENTRAL AND WESTERN CHESTER COUNTY INDUSTRIAL AUTHORITY</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>232279439</BondIssuerEIN>
        <BondIssuedDt>2010-12-23</BondIssuedDt>
        <IssuePriceAmt>6500000</IssuePriceAmt>
        <PurposeDesc>THE CONSTRUCTION AND EQUIPPING OF A RESEARCH FACILITY</PurposeDesc>
        <DefeasedInd>0</DefeasedInd>
        <OnBehalfOfIssuerInd>0</OnBehalfOfIssuerInd>
        <PoolFinancingInd>0</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <TotalProceedsAmt>6500000</TotalProceedsAmt>
        <CapitalizedInterestAmt>366050</CapitalizedInterestAmt>
        <IssuanceCostsFromProceedsAmt>44375</IssuanceCostsFromProceedsAmt>
        <CapitalExpendituresAmt>6089575</CapitalExpendituresAmt>
        <RefundingTaxExemptBondsInd>0</RefundingTaxExemptBondsInd>
        <RefundingTaxableBondsInd>0</RefundingTaxableBondsInd>
        <FinalAllocationMadeInd>1</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>1</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <OwningBondFinancedPropertyInd>0</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>0</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>1</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>0</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>0</HedgeIdentifiedInBksAndRecInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>0</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>0</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
    </IRS990ScheduleK>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>10</ContributionCnt>
        <NoncashContributionsRptF990Amt>386709</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>QUOTED MARKET PRICE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>DIRECTOR DIXON STROUD, JR. AND DIRECTOR ANNE STROUD HAVE A FAMILY RELATIONSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS COMPLETED BY THE CORPORATION'S AUDITORS AND IS DISTRIBUTED TO THE CORPORATION'S TREASURER FOR APPROVAL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION MAKES ITS CONFLICT OF INTEREST POLICY AVAILABLE TO ALL EMPLOYEES THROUGH ITS EMPLOYEE HANDBOOK. THE POLICY REQUIRES FULL AND PROMPT DISCLOSURE OF ANY CONFLICTS OF INTEREST TO THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION OF THE EXECUTIVE DIRECTOR, OFFICERS AND HIGHLY COMPENSATED EMPLOYEES ARE DETERMINED BY THE BOARD AFTER PRELIMINARY WORK AND CORRESPONDING ANALYSES PERFORMED BY THE CO-CHAIRMAN OF THE BOARD. THE DETAILS ARE COMMUNICATED DURING EXECUTIVE SESSION OF THE BOARD WHERE STAFF IS NOT PRESENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>PENSION RELATED CHANGES OTHER THAN NET PERIODIC PENSION COSTS -924,610.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR. THE CORPORATION'S BOARD OF DIRECTORS ASSUMES THE RESPONSIBILITY OF OVERSIGHT OF THE AUDIT OF ITS FINANCIAL STATEMENTS AND THE SELECTION OF ITS INDEPENDENT ACCOUNTANTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 8</FormAndLineReferenceDesc>
        <ExplanationTxt>DURING THE YEAR ENDED DECEMBER 31, 2019, THE CORPORATION MADE ADJUSTMENTS TO ITS PREVIOUSLY ISSUED FINANCIAL STATEMENTS. THE CORPORATION DETERMINED THAT CASH RECEIVED ON A PLEDGE RECEIVABLE IN THE AMOUNT OF $400,000 WAS INCORRECTLY REPORTED AS CONTRIBUTION INCOME FOR THE YEAR ENDED DECEMBER 31, 2018. THE CORPORATION RESTATED ITS 2018 FINANCIAL STATEMENTS TO REDUCE PLEDGES RECEIVABLE AND REDUCE CONTRIBUTION INCOME.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>