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        <PersonNm>MICHAEL S FADER</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL FALCONE</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KRISTIN FINKELSTEIN</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MICHAEL I GREENEBAUM</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BRETT INGERMAN</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOSHUA P JONES-DILWORTH</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HARRY KASSAP</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STANLEY J KRASKA JR</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RICHARD E LEVINE</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN A LUETKEMEYER JR</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN O MITCHELL IV</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>COURTNEY S MULLER</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STEVEN OH</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CALLIE J RAHMAN</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.00</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PATRICIA RAKSIN</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>HENRY A ROSENBERG JR</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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        <PersonNm>DAVID D ROTHSCHILD</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>RICHARD B SILBERSTEIN</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>VINCENT TALBERT</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TAYMOUR TAMADDON</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CLIVE WILLIAMS</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SAMUEL H WRIGHT</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DAVID J FARACE</PersonNm>
        <TitleTxt>HEAD OF SCHOOL</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SHERRI VOELKEL</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CHARLES W BRITTON</PersonNm>
        <TitleTxt>FORMER HEAD OF SCHOOL/DONOR &amp; ALUMNI REL. LIAISON</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN BRAD SHELLEY</PersonNm>
        <TitleTxt>ASSOCIATE HEADMASTER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KERRY JOHNSTON</PersonNm>
        <TitleTxt>DIRECTOR OF DEVELOPMENT</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DARREN FORD</PersonNm>
        <TitleTxt>HEAD OF MIDDLE SCHOOL</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>EUNICE DEEGAN</PersonNm>
        <TitleTxt>CO-DIRECTOR OF ATHLETICS</TitleTxt>
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        <PersonNm>MERRITT A LIVERMORE</PersonNm>
        <TitleTxt>HEAD OF UPPER SCHOOL</TitleTxt>
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        <PersonNm>MATTHEW G MACMULLAN</PersonNm>
        <TitleTxt>CO-DIRECTOR OF ATHLETICS</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BARBARA ROBINS</PersonNm>
        <TitleTxt>HEAD OF LOWER SCHOOL</TitleTxt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SAGE DINING SERVICES</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1402 YORK ROAD 100</AddressLine1Txt>
            <CityNm>LUTHERVILLE</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21093</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>BOWIE GRIDLEY ARCHITECTS PLLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1010 WISCONSIN AVENUE NW</AddressLine1Txt>
            <CityNm>WASHINGTON</CityNm>
            <StateAbbreviationCd>DC</StateAbbreviationCd>
            <ZIPCd>20007</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>WF MILLER CO</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>106 LONGDALE ROAD</AddressLine1Txt>
            <CityNm>TIMONIUM</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21093</ZIPCd>
          </USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>EVOLUTION MEDIA GROUP LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 401</AddressLine1Txt>
            <CityNm>LOGANVILLE</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>173420401</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>ADVERTISING</ServicesDesc>
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      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SEH EXCAVATING CONTRACTORS INC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>2940 DEDE RD</AddressLine1Txt>
            <CityNm>FINKSBURG</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21048</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>EXCAVATION</ServicesDesc>
        <CompensationAmt>158377</CompensationAmt>
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      <CntrctRcvdGreaterThan100KCnt>10</CntrctRcvdGreaterThan100KCnt>
      <FundraisingAmt>21205</FundraisingAmt>
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      <AllOtherContributionsAmt>12219475</AllOtherContributionsAmt>
      <NoncashContributionsAmt>2595434</NoncashContributionsAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>TUITION AND FEES</Desc>
        <BusinessCd>611710</BusinessCd>
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      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
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        <Desc>ANNUITIES PAYABLE</Desc>
        <Amt>760944</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>CONSTRUCTION FEES PAYABLE</Desc>
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      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED FINANCING COSTS</Desc>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedFinclStmtAmt>9322536</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotRptFinclStmtAmt>145170</ExpensesNotRptFinclStmtAmt>
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        <ExplanationTxt>ARTWORK AND ANTIQUES ARE AVAILABLE TO PROVIDE STUDENTS WITH ART EDUCATION ENRICHMENT.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL'S ENDOWMENTS CONSIST OF VARIOUS FUNDS ESTABLISHED TO SUPPORT A VARIETY OF SCHOLARSHIPS AND PROFESSIONAL DEVELOPMENT AT THE SCHOOL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ASC 740, INCOME TAXES, PRESCRIBES A RECOGNITION THRESHOLD AND A MEASUREMENT ATTRIBUTE FOR THE FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT OF TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN, AS WELL AS GUIDANCE ON DE-RECOGNITION, CLASSIFICATION, INTEREST AND PENALTIES AND FINANCIAL STATEMENT REPORTING DISCLOSURES. FOR THESE BENEFITS TO BE RECOGNIZED, A TAX POSITION MUST BE MORE LIKELY-THAN NOT TO BE SUSTAINED UPON EXAMINATION BY TAXING AUTHORITIES. THE AMOUNT RECOGNIZED IS MEASURED AS THE LARGEST AMOUNT OF BENEFIT THAT IS GREATER THAN FIFTY PERCENT LIKELY OF BEING REALIZED UPON ULTIMATE SETTLEMENT. THE SCHOOL RECOGNIZES INTEREST AND PENALTIES ACCRUED ON ANY UNRECOGNIZED TAX EXPOSURES AS A COMPONENT OF INCOME TAX EXPENSE. THE SCHOOL DOES NOT HAVE ANY AMOUNTS ACCRUED RELATING TO INTEREST AND PENALTIES AS OF JUNE 30, 2019 AND 2018.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN VALUE OF ASSETS HELD IN ANNUITY TRUSTS 259,120.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL AID EXPENSE NETTED WITH REVENUE 6,505,244. INVESTMENT EXPENSES NETTED WITH INVESTMENT REVENUE 145,170. COST OF GOODS SOLD -185,769. SPECIAL EVENT EXPENSE -24,411. RENTAL EXPENSES -326,708. CHANGE IN CSV OF LIFE INSURANCE -15,174. EMPLOYEE TUITION REMISSION 3,224,184.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>INVESTMENT EXPENSES NETTED WITH INVESTMENT REVENUE 145,170.</ExplanationTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
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        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>AS A CONDITION OF EMPLOYMENT, THE FOLLOWING MCDONOGH EMPLOYEES ARE PROVIDED HOUSING FOR THE CONVENIENCE AND BENEFIT OF THE SCHOOL. DAVID J. FARACE, HEAD OF SCHOOL, AND CHARLES W. BRITTON, FORMER HEAD OF SCHOOL AND CURRENT DONOR AND ALUMNI RELATIONS LIAISON, RECEIVED HOUSING AS A NONTAXABLE BENEFIT. AS A NONTAXABLE FRINGE BENEFIT, MEMBERSHIP FEES WERE PAID FOR CHARLES W. BRITTON, FORMER HEADMASTER AND CURRENT DONOR AND ALUMNI RELATIONS LIAISON OF MCDONOGH SCHOOL, IN THE AMOUNT OF $3,860. AS A NONTAXABLE FRINGE BENEFIT, MEMBERSHIP FEES WERE PAID FOR DAVID FARACE, THE HEAD OF SCHOOL, IN THE AMOUNT OF $650.</ExplanationTxt>
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        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>MARYLAND INDUSTRIAL DEVELOPMENT FINANCING AUTHORITY</BusinessNameLine1Txt>
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        <CUSIPNum>574221LGO</CUSIPNum>
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      <TaxExemptBondsIssuesGrp>
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        </IssuerName>
        <BondIssuerEIN>526002033</BondIssuerEIN>
        <CUSIPNum>574221ME4</CUSIPNum>
        <BondIssuedDt>2019-02-13</BondIssuedDt>
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        <PurposeDesc>CAPITAL IMPROVEMENTS; REFUNDING OF SERIES 2013 BONDS; FUND ISSUANCE COSTS</PurposeDesc>
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        <CapitalExpendituresAmt>5843091</CapitalExpendituresAmt>
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        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
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      <TaxExemptBondsPrivateBusUseGrp>
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        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
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      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>1</NoRebateDueInd>
        <VariableRateIssueInd>0</VariableRateIssueInd>
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        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>1</WrittenProcToMonitorReqsInd>
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      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>1</RebateNotDueYetInd>
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        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>0</VariableRateIssueInd>
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        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>1</WrittenProcToMonitorReqsInd>
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      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
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      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
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        <FormAndLineReferenceDesc>DATE REBATE COMPUTATION PERFORMED</FormAndLineReferenceDesc>
        <ExplanationTxt>ISSUER NAME: MARYLAND INDUSTRIAL DEVELOPMENT FINANCING AUTHORITY DATE THE REBATE COMPUTATION WAS PERFORMED: 10/27/2016</ExplanationTxt>
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      <GrntAsstBnftInterestedPrsnGrp>
        <CashGrantAmt>45536</CashGrantAmt>
        <TypeOfAssistanceTxt>TUITION REMISSION</TypeOfAssistanceTxt>
        <AssistancePurposeTxt>EDUCATION</AssistancePurposeTxt>
      </GrntAsstBnftInterestedPrsnGrp>
      <GrntAsstBnftInterestedPrsnGrp>
        <CashGrantAmt>44320</CashGrantAmt>
        <TypeOfAssistanceTxt>TUITION ASSISTANCE</TypeOfAssistanceTxt>
        <AssistancePurposeTxt>EDUCATION</AssistancePurposeTxt>
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      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>47875</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>APPRAISAL OF FMV</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>42</ContributionCnt>
        <NoncashContributionsRptF990Amt>2547559</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <Form8283ReceivedCnt>2</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED AND APPROVED BY THE AUDIT COMMITTEE. AFTER THAT REVIEW, THE FORM 990 IS POSTED ON THE TRUSTEE WEBSITE FOR APPROVAL BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THE CONFLICT OF INTEREST POLICY AND RELATED QUESTIONNAIRE ARE SUBMITTED TO ALL INTERESTED PARTIES AND ALL CURRENT MEMBERS OF THE BOARD OF TRUSTEES TO REVIEW, COMPLETE, AND SIGN. THE QUESTIONNAIRE WHICH DISCLOSES, IF APPLICABLE, ANY POTENTIAL CONFLICTS, IS SUBMITTED TO THE VICE PRESIDENT OF THE BOARD OF TRUSTEES FOR REVIEW. ANY POTENTIAL CONFLICTS ARE RESOLVED BY THE EXECUTIVE COMMITTEE OF THE BOARD OF TRUSTEES. IF A CONFLICT EXISTS, THE INTEREST PERSON IS PROHIBITED FROM PARTICIPATING IN THE GOVERNING BODY'S DELIBERATIONS AND DECISIONS SURROUNDING THE CONFLICTED MATTER. THE CONFLICT OF INTEREST POLICY IS ANNUALLY REVIEWED BY THE GOVERNANCE COMMITTEE OF THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>MCDONOGH SCHOOL MAINTAINS AN EXECUTIVE COMPENSATION POLICY FOR DETERMINING COMPENSATION FOR BOTH OFFICERS AND KEY EMPLOYEES. MCDONOGH SCHOOL USES PEER DATA PROVIDED BY IRS FORM 990 AND DATA PROVIDED BY BOTH AIMS (ASSOCIATION OF INDEPENDENT MARYLAND SCHOOLS) AND NAIS (NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS) FOR COMPARABILITY PURPOSES. THE INDEPENDENT BOARD HIRES AND DETERMINES COMPENSATION OF THE HEADMASTER, WHO THEN HIRES AND DETERMINES COMPENSATION OF OTHER TOP MANAGEMENT OFFICIALS, OFFICERS, AND KEY EMPLOYEES. ALL COMPENSATION IS DETERMINED BASED ON PERFORMANCE, COMPARABLE COMPENSATION DATA, AND BUDGETARY GUIDELINES AS APPROVED BY COMMITTEES OF THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICIES, AND FINANCIAL STATEMENTS ARE MADE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CHANGE IN MARKET VALUE OF INTEREST RATE SWAP -65,132. CHANGE IN VALUE OF ASSETS HELD IN ANNUITY TRUSTS -92,790. CHANGE IN VALUE OF ANNUITIES PAYABLE 61,179. CHANGE IN CHARITABLE REMAINDER UNITRUST 290,731. CHANGE IN VALUE OF CASH SURRENDER VALUE 15,174.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 12, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THIS PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>FOLIO NETWORK LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 380</AddressLine1Txt>
          <CityNm>OWINGS MILLS</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <EIN>275349063</EIN>
        <PrimaryActivitiesTxt>SCHOOL PERFORMANCE APPRAISAL SOFTWARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <TotalIncomeAmt>106890</TotalIncomeAmt>
        <EndOfYearAssetsAmt>1092450</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>MCDONOGH SCHOOL INCORPORATED</BusinessNameLine1Txt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>MCDONOGH PARENTS ASSOCIATION</BusinessNameLine1Txt>
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          <AddressLine1Txt>PO BOX 380</AddressLine1Txt>
          <CityNm>OWINGS MILLS</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <EIN>526019724</EIN>
        <PrimaryActivitiesTxt>TO SUPPORT MCDONOGH SCHOOL</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>CHARITABLE REMAINDER UNITRUST (9)</BusinessNameLine1Txt>
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          <CityNm>OWINGS MILLS</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>CHARITABLE REMAINDER UNITRUST</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <EntityTypeTxt>T</EntityTypeTxt>
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      </IdRelatedOrgTxblCorpTrGrp>
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      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
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      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
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      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
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      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
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</Return>