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      <TotalBookValueOtherAssetsAmt>313913</TotalBookValueOtherAssetsAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc4">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 1, ITEM B</FormAndLineReferenceDesc>
        <ExplanationTxt>ERROR IN RECORDING MUSEUM ASSETS AS OPERATING ASSETS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 2, PART III, LINE 4D</FormAndLineReferenceDesc>
        <ExplanationTxt>TONOPAH HISTORIC MINING PARK PROGRAM COSTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS REVIEW THE RETURN PRIOR TO FILING AND DISCUSS THEIR REVEIW WITH BOARD MEMBERS AT A BOARD MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>DOCUMENTS ARE PROVIDED TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>13,864 0 0 26,512 0 0 TOTAL 40,376 0 0</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>