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      <RevenueNotRptdOnFinStmt>-698299</RevenueNotRptdOnFinStmt>
      <TotalRevenuePerForm990>21095068</TotalRevenuePerForm990>
      <TotExpensesEtcAuditedFinclStmt>20274423</TotExpensesEtcAuditedFinclStmt>
      <DonatedServicesUseOfFacilities>1587718</DonatedServicesUseOfFacilities>
      <OtherExpensesIncluded>698299</OtherExpensesIncluded>
      <ExpensesNotRptdF990>2286017</ExpensesNotRptdF990>
      <ExpensesSubtotal>17988406</ExpensesSubtotal>
      <ExpensesNotRptdOnFinStmt>0</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>17988406</TotalExpensesPerForm990>
      <Form990ScheduleDPartXIV>
        <Identifier>DESCRIPTION OF INTENDED USE OF ENDOWMENT FUNDS:</Identifier>
        <ReturnReference>PART V, LINE 4:</ReturnReference>
        <Explanation>ENDOWMENT EARNINGS ARE USED AS SUBSIDIES FOR EDUCATIONAL PROGRAMS, INCLUDING CAMPS, CLASSES, CAMP-INS AND SUB-INS.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>DESCRIPTION OF UNCERTAIN TAX POSITIONS UNDER FIN 48:</Identifier>
        <ReturnReference>PART X:</ReturnReference>
        <Explanation>THE MUSEUM RECOGNIZES THE TAX BENEFIT FROM UNCERTAIN TAX POSITIONS ONLY IF IT IS MORE LIKELY THAN NOT THAT THE TAX POSITIONS WILL BE SUSTAINED ON EXAMINATION BY THE TAX AUTHORITIES, BASED ON THE TECHNICAL MERITS OF THE POSITION. THE TAX BENEFIT IS MEASURED BASED ON THE LARGEST BENEFIT THAT HAS A GREATER THAN 50% LIKELIHOOD OF BEING REALIZED UPON ULTIMATE SETTLEMENT. THE MUSEUM RECOGNIZES INTEREST AND PENALTIES RELATED TO INCOME TAX MATTERS IN OPERATING EXPENSES. THE MUSEUM HAD NO UNRECOGNIZED TAX BENEFITS AT MAY 31, 2011 OR 2010. THE MUSEUM FILES AN EXEMPT ORGANIZATION RETURN AND APPLICABLE UNRELATED BUSINESS INCOME TAX RETURN IN THE U.S. FEDERAL JURISDICTION AND OREGON DEPARTMENT OF REVENUE. THE MUSEUM IS NO LONGER SUBJECT TO INCOME TAX EXAMINATIONS BY TAXING AUTHORITIES FOR YEARS BEFORE 2007 FOR ITS FEDERAL AND STATE FILINGS.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XII, LINE 4B - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>COST OF GOODS SOLD NETTED FOR 990 PURPOSES -698,299.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XIII, LINE 2D - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>COST OF GOODS SOLD NETTED FOR 990 PURPOSES 698,299.</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="RetDoc1041300001">
      <EventsInformation>
        <NameOfEvent1>GALA</NameOfEvent1>
        <GrossReceiptsEvent1>614043</GrossReceiptsEvent1>
        <CharitableContributionsEvent1>310393</CharitableContributionsEvent1>
        <GrossRevenueEvent1>303650</GrossRevenueEvent1>
        <OtherDirectExpensesEvent1>149201</OtherDirectExpensesEvent1>
        <GrossReceiptsTotal>614043</GrossReceiptsTotal>
        <CharitableContributionsTotal>310393</CharitableContributionsTotal>
        <GrossRevenueTotalEvents>303650</GrossRevenueTotalEvents>
        <OtherDirectExpensesTotalEvents>149201</OtherDirectExpensesTotalEvents>
        <DirectExpenseSummaryEvents>149201</DirectExpenseSummaryEvents>
        <NetIncomeSummary>154449</NetIncomeSummary>
      </EventsInformation>
    </IRS990ScheduleG>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <CompensationCommittee>X</CompensationCommittee>
      <IndependentConsultant>X</IndependentConsultant>
      <Form990OfOtherOrganizations>X</Form990OfOtherOrganizations>
      <CompensationSurvey>X</CompensationSurvey>
      <BoardOrCommitteeApproval>X</BoardOrCommitteeApproval>
      <SeverancePayment>0</SeverancePayment>
      <SupplementalNonqualRetirePlan>0</SupplementalNonqualRetirePlan>
      <EquityBasedCompArrangement>0</EquityBasedCompArrangement>
      <CompBasedOnRevenueOfFilingOrg>0</CompBasedOnRevenueOfFilingOrg>
      <CompBasedOnRevenueRelatedOrgs>0</CompBasedOnRevenueRelatedOrgs>
      <CompBasedNetEarningsFilingOrg>0</CompBasedNetEarningsFilingOrg>
      <CompBasedNetEarningsRelateOrgs>0</CompBasedNetEarningsRelateOrgs>
      <AnyNonFixedPayments>0</AnyNonFixedPayments>
      <InitialContractException>0</InitialContractException>
      <Form990ScheduleJPartII>
        <NamePerson>NANCY STUEBER</NamePerson>
        <BaseCompensationFilingOrg>161076</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>1846</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>5261</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>168183</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION B, LINE 11</Identifier>
        <Explanation>FORM 990 IS REVIEWED IN DETAIL AT THE FINANCE AND AUDIT COMMITTEE MEETING BEFORE FILING, AS WELL AS IN SUMMARY AT A GENERAL BOARD MEETING.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>MANAGEMENT FOLLOWS UP ON ANY POTENTIAL CONFLICTS OF INTEREST THAT ARE IDENTIFIED IN THE ANNUAL FORMS COMPLETED BY BOARD MEMBERS, AS WELL AS WATCHES OUT FOR POTENTIAL CONFLICTS THROUGH THE APPROVAL PROCESS FOR PURCHASE ORDERS AND INVOICES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 15</ReturnReference>
        <Explanation>OMSI'S EXECUTIVE COMMITTEE REVIEWS AND APPROVES OFFICER COMPENSATION PACKAGES AND USES MARKET DATA TO DETERMINE SALARY RANGES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>FINANCIAL STATEMENTS ARE MADE AVAILABLE TO THE PUBLIC THROUGH THE ORGANIZATION'S WEB SITE; GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE MADE AVAILABLE UPON REQUEST.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED GAINS ON INVESTMENTS: 29,492.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
  </ReturnData>
</Return>