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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S COLLECTIONS CONSIST OF ARTIFACTS OF HISTORICAL, CULTURAL, OR SCIENTIFIC SIGNIFICANCE THAT ARE HELD FOR EDUCATIONAL, RESEARCH, SCIENTIFIC, AND CURATORIAL PURPOSES. EACH OF THE ITEMS IS CATALOGED, PRESERVED, AND CARED FOR, AND ACTIVITIES VERIFYING THEIR EXISTENCE AND ASSESSING THEIR CONDITION ARE PERFORMED CONTINUOUSLY. THE COLLECTIONS ARE SUBJECT TO A POLICY THAT REQUIRES PROCEEDS FROM THEIR SALES TO BE USED TO ACQUIRE OTHER ITEMS FOR COLLECTIONS OR PROVIDE FOR THE DIRECT CARE OF EXISTING FACILITIES. IN ACCORDANCE WITH PRACTICE GENERALLY FOLLOWED BY MUSEUMS, THE VALUE OF OBJECTS IN THE COLLECTIONS IS EXCLUDED FROM THE FINANCIAL STATEMENTS. SUCH COLLECTION ITEMS ARE RECORDED AS DECREASES IN UNRESTRICTED NET ASSETS IN THE YEAR IN WHICH THE ITEMS ARE ACQUIRED OR AS COLLECTION ITEMS ARE NOT REFLECTED IN THE FINANCIAL STATEMENTS. PROCEEDS FROM THE DEACCESSIONS OR INSURANCE RECOVERIES ARE REFLECTED AS INCREASES IN NET ASSETS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>COLLECTIONS CONSIST OF HISTORICAL ITEMS THAT ENHANCE THE INTELLECTUAL, CREATIVE, AND CIVIC LIFE OF COOS COUNTY AND THE SURROUNDING AREA BY FACILITATING AWARENESS OF ITS HISTORY. COOS COUNTY HISTORICAL SOCIETY IS THE ONLY SOURCE OF COUNTY-WIDE HISTORICAL INFORMATION AND PROVIDES EXTENSIVE SCHOOL PROGRAMS, EVENTS, LECTURES, ACTIVITIES, EXHIBITS, AND FIELD TRIPS FOR ALL AGE GROUPS, OFTEN IN COLLABORATION WITH OTHER NON-PROFIT CULTURAL GROUPS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>TO FUND FUTURE EDUCATION ACTIVITIES AND OPERATIONAL NEEDS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION REPORTED NO UNCERTAIN TAX POSITIONS IN ITS FINANCIAL STATEMENTS FOR 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISING EXPENSE NETTED WITH REVENUE</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISING EXPENSE NETTED WITH REVENUE</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>NO AUTHORITY IS DELEGATED TO COMMITTEES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S INDEPENDENT ACCOUNTANT PREPARES THE FORM 990 AND PROVIDES A DRAFT FOR REVIEW. EACH BOARD MEMBER IS GIVEN A CHANCE TO REVIEW, ASK QUESTIONS, AND PROPOSE CHANGES PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH BOARD MEMBER AND KEY EMPLOYEE REVIEWS AND SIGNS THE CONFLICT OF INTEREST POLICY ANNUALLY. AT THE START OF EACH BOARD OF DIRECTORS AND EXECUTIVE COMMITTEE MEETING, MEMBERS ARE ASKED TO DECLARE ANY CONFLICT RELATED TO AGENDA ITEMS. MEMBERS WITH DECLARED CONFLICTS LEAVE THE ROOM DURING DISCUSSION AND ACTION ON RELEVANT AGENDA ITEMS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION IS REVIEWED ANNUALLY BY THE BOARD FOR THE EXECUTIVE DIRECTOR AND OTHER TOP MANAGEMENT OFFICIALS. SALARY AMOUNTS ARE SET USING LOCAL COMPARISON STUDIES AND OTHER FACTORS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS FORM 990 AND FORM 1023 AVAILABLE FOR PUBLIC INSPECTION UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC WHEN IT RECEIVES A WRITTEN OR IN PERSON REQUEST TO ITS OFFICE IN COOS BAY, OR.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>FUNDRAISING EXPENSE NETTED WITH REVENUE -1,308.</ExplanationTxt>
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      <SupplementalInformationDetail>
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</Return>