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      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
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      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingOtherInd methodOfAccountingOtherDesc="MODIFIED CASH">X</MethodOfAccountingOtherInd>
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      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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        <Desc>HISTORICAL COLLECTIONS</Desc>
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        <Desc>TAX WITHHOLDINGS</Desc>
        <Amt>2027</Amt>
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      <TotalLiabilityAmt>2027</TotalLiabilityAmt>
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        <Event1Nm>FUNDRAISING EVE</Event1Nm>
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        <GrossRevenueTotalEventsAmt>30985</GrossRevenueTotalEventsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 1, PART I, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>LABOR ASSOCIATED WITH THE OPERATIONS OF THE BLENNERHASSET HISTORICAL FOUNDATION, INC. AND ITS PROGRAMS IS PRIMARILY PROVIDED BY VOLUNTEERS. THE FOUNDATION HAS ORGAINIZED A PROGRAM WHEREBY VOLUNTEER SERVICES ARE UTILIZED TO MEET CERTAIN OF THE ORGANIZATION'S ROUTINE HUMAN RESOURCE REQUIREMENTS. SUCH SERVICES PROVIDED BY VOLUNTEERS INCLUDE ISLAND AND MUSEUM TOURS, AS WELL AS OPERATING THE RETAIL GIFT SHOP. ALL VOLUNTEERS REQUIRE SPECIAL TRAINING RELATED TO THE HISTORICAL AND CULTURAL SIGNIFICANCE OF BLENNERHASSETT ISLAND. TOTAL DONATED HOURS HAVE BEEN ESTIMATED AT 15,000 FOR THE YEAR ENDING DECEMBER 31, 2018.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>A DRAFT COPY OF THE FORM 990 IS MADE AVAILABLE TO THE BOARD MEMBERS FOR REVIEW BEFORE THE CHAIRMAN AND TREASURER ULTIMATLEY SIGN-OFF ON THE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION'S CONFLICT OF INTEREST POLICY IS AT A MINIMUM REVIEWED AND DISCUSSED ANNUALLY WITH ALL OFFICERS, BOARD MEMBERS, AND EMPLOYEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION DOES NOT COMPENSATE DIRECTORS, OFFICERS OR "TOP OFFICIALS".</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION DOES NOT COMPENSATE DIRECTORS, OFFICERS OR "TOP OFFICIALS". THE COMPENSATION OF EMPLOYEES IS DISCUSSED AND REVIEWED ANNUALLY BY THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS ARE MADE AVAILABLE UPON WRITTEN REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 24E</FormAndLineReferenceDesc>
        <ExplanationTxt>REPAIRS &amp; MAINT. 7,618 0 0 AGENCY FEES 384 3,456 0 BANK FEES/CC SVC CHARGES 0 3,180 0 COSTUME REPAIRS &amp; MAINT. 2,500 625 0 MISCELLANEOUS 1,476 1,476 0 SUPPLIES 1,475 1,475 0 OFFICE SUPPLIES 257 2,314 0 MANSION &amp; GROUNDS EXPENSE 2,500 0 0 POSTAGE &amp; FREIGHT 128 1,153 0 TELEPHONE 519 520 0 VOLUNTEER APPRECIATION 503 503 0 DUES &amp; SUBSCRIPTIONS 94 850 0 INTERNET EXPENSE 411 411 0 TAXES &amp; LICENSES 10 95 0 TOTAL 17,875 16,058 0</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>ROUNDING ADJUSTMENT 3</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII</FormAndLineReferenceDesc>
        <ExplanationTxt>(1) MODIFIED CASH BASIS OF ACCOUNTING. (2A) THE ORGANIZATION IS NOT PART OF A CONSOLIDATED GROUP.</ExplanationTxt>
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</Return>