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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Footnote for uncertain tax position under FIN 48 (Part X)</FormAndLineReferenceDesc>
        <ExplanationTxt>The audited financial statements of the Sewickley Public Library contain a footnote disclosure for uncertain tax positions under FIN 48. As of December 31, 2023, the Library had no uncertain tax positions.</ExplanationTxt>
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    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Committee meeting documentation Part VI line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors documents the results of its formal meetings of the full governing body.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Committee of the Board reviews the Form 990. Once all questions and concerns are discussed, the final draft is presented to the entire Board for review and approval.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Director and/or President of the Board reviews the annually submitted conflict of interest forms and ensures all Board members are aware of potential conflicts of interest.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CEO executive director top management comp Part VI line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Librarys Board of Directors review and approve the compensation of the Executive Director and considers the results of outside surveys in determining this amount. The Executive Committee of the Board of Directors consults with the Executive Director regarding the compensation of key library employees while also considering the results of outside surveys and other data.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other officer or key employee compensation Part VI line 15b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Librarys Board of Directors review and approve the compensation of the Executive Director and considers the results of outside surveys in determining this amount. The Executive Committee of the Board of Directors consults with the Executive Director regarding the compensation of key library employees while also considering the results of outside surveys and other data.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is available on Guidestar. Documents, policies and financial statements, as well as the Form 990, are available upon request from the Administrative office at the Library.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI response or note to any line in Part XI</FormAndLineReferenceDesc>
        <ExplanationTxt>Part XI Reconciliation of Net Asset - Line 8 Prior Period Adjustments. The prior period adjustment of $316,204 to the January 1, 2022 net assets of the Sewickley Public Library represents a reconciliation to update the Librarys accumulated depreciation on fixed assets to actual.</ExplanationTxt>
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</Return>