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      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>1745518</TotalBookValueSecuritiesAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>IN THE PAST YEAR, HYDROPOWER RESEARCH INSTITUTE HAS TAKEN ON SPECIAL PROJECTS ENTAILING THE ANALYSIS OF DATA TO AID IN THE MEMBERSHIP'S OPERATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>WYATT WILLIAMS AND LISA MARTINDALE HAVE A BUSINESS RELATIONSHIP THROUGH THEIR JOINT EMPLOYMENT BY SOUTHERN COMPANY. KIRK HUDSON AND INGRID MILLER HAVE A BUSINESS RELATIONSHIP THROUGH THEIR JOINT EMPLOYMENT BY CHELAN COUNTY PUD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>HYDROPOWER RESEARCH INSTITUTE HAS MAINTENANCE, ONBOARDING, AND OPERATIONS OF THE PLATFORM OUTSOURCED TO A THIRD PARTY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS MUST MEET THE QUALIFICATIONS SET FORTH IN THE BYLAWS AND BE APPROVED BY A UNANIMOUS VOTE OF THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS OF THE ORGANIZATION HAVE THE RIGHT TO APPOINT AND REMOVE DIRECTORS TO THE GOVERNING BODY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE NO COMMITTEES THAT HAVE BEEN GRANTED AUTHORITY TO ACT ON BEHALF OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS PREPARED BY AN ACCOUNTING FIRM, REVIEWED BY THE TREASURER AND THEN PROVIDED TO THE BOARD FOR REVIEW AND APPROVAL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION PROVIDES COPIES OF ITS GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBER ENGAGEMENT 51,809. COACHING AND PROJECTS 406,327.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>