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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>0</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>1388546</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>true</AuditCommitteeInd>
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    <IRS990ScheduleD documentId="RetDoc2">
      <LandGrp>
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        <BookValueAmt>367369</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>5445177</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1806235</DepreciationAmt>
        <BookValueAmt>3638942</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
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        <DepreciationAmt>45682588</DepreciationAmt>
        <BookValueAmt>101044398</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>105050709</TotalBookValueLandBuildingsAmt>
      <InvstProgramRelatedOrgGrp>
        <Desc>INVESTMENT IN ASSOC ORGANIZATI</Desc>
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        <MethodValuationCd>C</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
        <Desc>SUBORDINATED CERTIFICATES</Desc>
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        <MethodValuationCd>C</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
        <Desc>OTHER INVESTMENTS</Desc>
        <BookValueAmt>27189</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <TotalBookValueProgramRltdAmt>21672814</TotalBookValueProgramRltdAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>POSTRETIREMENT BENEFIT OBLIGATION</Desc>
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      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>307000</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueSubtotalAmt>49138057</RevenueSubtotalAmt>
      <TotalRevenuePerForm990Amt>49138057</TotalRevenuePerForm990Amt>
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      <ExpensesSubtotalAmt>46732284</ExpensesSubtotalAmt>
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      <ExpensesNotRptFinclStmtAmt>2405773</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>49138057</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 3, PART X</FormAndLineReferenceDesc>
        <ExplanationTxt>AN EVALUATION OF WHETHER OR NOT IT HAS ANY UNCERTAIN TAX POSITIONS IS DETERMINED ON AN ANNUAL BASIS BY THE COOPERATIVE. WHILE THE COOPERATIVE BELIEVES IT HAS ADEQUATELY PROVIDED FOR ALL TAX POSITIONS, AMOUNTS ASSERTED BY TAXING AUTHORITIES COULD BE DIFFERENT THAN THE POSITIONS TAKEN BY THE COOPERATIVE. THE COOPERATIVE RECOGNIZES ANY INTEREST AND PENALTIES ASSESSED BY TAXING AUTHORITIES IN INCOME TAX EXPENSE AND, WITH FEW EXCEPTIONS, IS NO LONGER SUBJECT TO FEDERAL, STATE OR LOCAL INCOME TAX EXAMINATIONS BY TAXING AUTHORITIES FOR YEARS BEFORE 2019.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XII, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>MARGINS ASSIGNED TO MEMBERS 2,405,773</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="RetDoc3">
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LUKE JOHNSON</PersonNm>
        <TitleTxt>GENERAL MANAGER</TitleTxt>
        <BaseCompensationFilingOrgAmt>193569</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>151765</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>25826</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>371160</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRADD GRUBB</PersonNm>
        <TitleTxt>DIR OF OPERATIONS</TitleTxt>
        <BaseCompensationFilingOrgAmt>138517</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>76543</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>24330</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>239390</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRAD AHLERS</PersonNm>
        <TitleTxt>FOREMAN</TitleTxt>
        <BaseCompensationFilingOrgAmt>137420</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>68326</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19407</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>225153</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>JEFFREY C HOPE</PersonNm>
        <TitleTxt>FOREMAN</TitleTxt>
        <BaseCompensationFilingOrgAmt>138190</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>51278</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19386</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>208854</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SHANNON DAVIS</PersonNm>
        <TitleTxt>SERVICEMAN</TitleTxt>
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        <DeferredCompensationFlngOrgAmt>43604</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19373</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>201770</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRANNON DASCH</PersonNm>
        <TitleTxt>FOREMAN</TitleTxt>
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        <DeferredCompensationFlngOrgAmt>27960</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>19379</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>187012</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CHRISTINE HARRIS</PersonNm>
        <TitleTxt>SUPERVISOR OF ACCTG</TitleTxt>
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        <DeferredCompensationFlngOrgAmt>40541</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>13279</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>154847</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
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    <IRS990ScheduleO documentId="RetDoc4">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>TRI-COUNTY IS A MEMBER OWNED ELECTRIC COOPERATIVE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH MEMBER SHALL BE ENTITLED TO ONLY ONE VOTE AND ALL BOARD MEMBERS ARE ELECTED BY THE MEMBERSHIP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>COOPERATIVE MEMBERS RATIFY ALL BYLAW CHANGES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SUPERVISOR OF ACCOUNTING REVIEWS AND VERIFIES THAT FIGURES AGREE TO THE COOPERATIVE'S RECORDS AND THE GENERAL MANAGER REVIEWS FOR REASONABLENESS BEFORE DISTRIBUTING TO THE BOARD OF DIRECTORS. THE BOARD IS GIVEN THE OPPORTUNITY TO REVIEW AND ASK QUESTIONS BEFORE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>CONFLICT OF INTEREST FORMS AR COMPLETED BY EMPLOYEES AND BOARD MEMBERS ANNUALLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>TRI-COUNTY ELECTRIC COOPERATIVE USES THE NRECA COMPENSATION SURVEY AND ILLINOIS EMPLOYER ASSOCIATION WAGE SURVEY AS A GUIDE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>TRI-COUNTY ELECTRIC COOPERATIVE USES THE NRECA COMPENSATION SURVEY AND ILLINOIS EMPLOYER ASSOCIATION WAGE SURVEY AS A GUIDE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>BYLAWS ARE OFFERED TO ALL NEW MEMBERS AND ALL OTHER DOCUMENTS ARE AVAILABLE UPON REQUEST. BYLAWS ARE ALSO PUBLISHED ON OUR WEBSITE. FINANCAIL STATEMENTS ARE PUBLISHED ANNUALLY IN OUR MONTHLY NEWSLETTER THAT IS MAILED OR EMAILED TO MEMBERS AS WELL AS PUBLISHED ON OUR WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART X</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART IX, LINE 4 THE INSTRUCTIONS TO THE 2022 FORM 990 INDICATE THAT ORGANIZATIONS EXEMPT UNDER SECTION 501(C)(12) SHOULD REPORT "PATRONAGE DIVIDENDS PAID" TO THEIR MEMBERS IN PART IX, LINE 4 OF THE FORM 990. THE COOPERATIVE HAS INTERPRETED THE WORDS "PATRONAGE DIVIDENDS PAID" IN THE INSTRUCTIONS TO MEAN MARGINS THAT ARE ASSIGNED OR ASSIGNABLE TO THE MEMBERS. THE COOPERATIVE ASSIGNS THE NET MARGINS TO ITS MEMBERS EACH YEAR. THEREFORE, THE AMOUNT LISTED IN PART IX, LINE 4 REPRESENTS THE NET MARGINS ASSIGNABLE TO THE MEMBERS FOR THE CALENDAR YEAR ENDED DECEMBER 31, 2022.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>MARGINS ASSIGNED TO MEMBERS 2,405,773 OTHER CHANGES 32,560 RETIREMENT OF CAPITAL CREDITS -1,049,787 TOTAL 1,388,546</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
