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        <DepreciationAmt>1872</DepreciationAmt>
        <BookValueAmt>7378</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>7378</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <Desc>MUSEUM ARTIFACTS</Desc>
        <BookValueAmt>414099</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>414099</TotalBookValueOtherAssetsAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc4">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 1, ITEM B</FormAndLineReferenceDesc>
        <ExplanationTxt>AN ERROR WAS NOTED ON THE TAX RETURN FOR 2023. MUSEUM ARTIFACTS WERE INCORRECTLY REPORTED AS OPERATING ASSETS AND DEPRECIATED. AN AMENDMENT WAS MADE ON THE 2023 TAX RETURN. TO CORRECT THIS ERROR THIS AMENDMENT REFLECTS THE CORRECTIONS MADE TO THE 2023 TAX RETURN THAT CARRY FORWARD TO THE 2024 TAX RETURN. MUSEUM ARTIFACTS HAVE BEEN REMOVED FROM DEPRECIABLE ASSETS, AND ARE REPORTED AS OTHER ASSETS ON THE BALANCE SHEET .</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>
    </IRS990ScheduleO>
  </ReturnData>
</Return>