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        <CompensationAmt>321646</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>5</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>Sale of Electricity</Desc>
        <BusinessCd>221000</BusinessCd>
        <TotalRevenueColumnAmt>49516082</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>49516082</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Capital Credits</Desc>
        <BusinessCd>221000</BusinessCd>
        <TotalRevenueColumnAmt>1605773</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1605773</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Miscellaneous</Desc>
        <BusinessCd>221000</BusinessCd>
        <TotalRevenueColumnAmt>375967</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>375967</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>51497822</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>169837</TotalRevenueColumnAmt>
        <ExclusionAmt>169837</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossRentsGrp>
        <PersonalAmt>52569</PersonalAmt>
      </GrossRentsGrp>
      <RentalIncomeOrLossGrp>
        <PersonalAmt>52569</PersonalAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>52569</TotalRevenueColumnAmt>
        <ExclusionAmt>52569</ExclusionAmt>
      </NetRentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <OtherAmt>1502</OtherAmt>
      </GrossAmountSalesAssetsGrp>
      <GainOrLossGrp>
        <OtherAmt>1502</OtherAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1502</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1502</RelatedOrExemptFuncIncomeAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>Non-Operating</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>20582</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>20582</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>20582</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>51742312</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>51519906</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>222406</ExclusionAmt>
      </TotalRevenueGrp>
      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <BenefitsToMembersGrp>
        <TotalAmt>3643999</TotalAmt>
      </BenefitsToMembersGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>523443</TotalAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>990440</TotalAmt>
      </OtherSalariesAndWagesGrp>
      <InterestGrp>
        <TotalAmt>3115338</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>4484836</TotalAmt>
      </DepreciationDepletionGrp>
      <OtherExpensesGrp>
        <Desc>Cost of Power</Desc>
        <TotalAmt>31195101</TotalAmt>
        <ProgramServicesAmt>31195101</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Distribution Expense</Desc>
        <TotalAmt>5095424</TotalAmt>
        <ProgramServicesAmt>5095424</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Admin &amp; General</Desc>
        <TotalAmt>1690884</TotalAmt>
        <ProgramServicesAmt>1690884</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Member Services</Desc>
        <TotalAmt>851451</TotalAmt>
        <ProgramServicesAmt>851451</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>151396</TotalAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>51742312</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>4971910</BOYAmt>
        <EOYAmt>4927391</EOYAmt>
      </CashNonInterestBearingGrp>
      <AccountsReceivableGrp>
        <BOYAmt>4405521</BOYAmt>
        <EOYAmt>4261344</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>1167695</BOYAmt>
        <EOYAmt>1100620</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>491158</BOYAmt>
        <EOYAmt>535637</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>157908480</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>50623720</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>105050709</BOYAmt>
        <EOYAmt>107284760</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>21672814</BOYAmt>
        <EOYAmt>23065139</EOYAmt>
      </InvestmentsProgramRelatedGrp>
      <TotalAssetsGrp>
        <BOYAmt>137759807</BOYAmt>
        <EOYAmt>141174891</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>8806013</BOYAmt>
        <EOYAmt>7045039</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>4391730</BOYAmt>
        <EOYAmt>4406302</EOYAmt>
      </DeferredRevenueGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>64717064</BOYAmt>
        <EOYAmt>65608330</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>307000</BOYAmt>
        <EOYAmt>306813</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>78221807</BOYAmt>
        <EOYAmt>77366484</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
      <PdInCapSrplsLandBldgEqpFundGrp>
        <BOYAmt>1182994</BOYAmt>
        <EOYAmt>3148901</EOYAmt>
      </PdInCapSrplsLandBldgEqpFundGrp>
      <RtnEarnEndowmentIncmOthFndsGrp>
        <BOYAmt>58355006</BOYAmt>
        <EOYAmt>60659506</EOYAmt>
      </RtnEarnEndowmentIncmOthFndsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>59538000</BOYAmt>
        <EOYAmt>63808407</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>137759807</BOYAmt>
        <EOYAmt>141174891</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>0</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>4270407</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>true</AuditCommitteeInd>
    </IRS990>
    <IRS990ScheduleD documentId="990D">
      <LandGrp>
        <OtherCostOrOtherBasisAmt>367369</OtherCostOrOtherBasisAmt>
        <BookValueAmt>367369</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>5631517</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>2879280</DepreciationAmt>
        <BookValueAmt>2752237</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>151909594</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>47744440</DepreciationAmt>
        <BookValueAmt>104165154</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>107284760</TotalBookValueLandBuildingsAmt>
      <InvstProgramRelatedOrgGrp>
        <Desc>Investment in Associated Organizati</Desc>
        <BookValueAmt>21502705</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Subordinated Certificates</Desc>
        <BookValueAmt>1531692</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Other Investments</Desc>
        <BookValueAmt>30742</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <TotalBookValueProgramRltdAmt>23065139</TotalBookValueProgramRltdAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Postretirement Benefit Obligation</Desc>
        <Amt>306813</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>306813</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>51742312</TotalRevEtcAuditedFinclStmtAmt>
      <RevenueSubtotalAmt>51742312</RevenueSubtotalAmt>
      <TotalRevenuePerForm990Amt>51742312</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>48098313</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesSubtotalAmt>48098313</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>3643999</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>3643999</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>51742312</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other expenses included on Form 990 (Part XII, line 4b)</FormAndLineReferenceDesc>
        <ExplanationTxt>Margins Assigned to Members $3,643,999</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Footnote for uncertain tax position under FIN 48 (Part X)</FormAndLineReferenceDesc>
        <ExplanationTxt>An evaluation of whether or not it has any uncertain tax positions isdetermined on an annual basis by the Cooperative. While the Cooperativebelieves it has adequately provided for all tax positions, amounts assertedby taxing authorities could be different than the positions taken by theCooperative. The Cooperative recognizes any interest and penaltiesassessed by taxing authorities in income tax expense and, with fewexceptions, is no longer subject to federal, state or local income taxexaminations by taxing authorities for years before 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="990J">
      <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>203807</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>103536</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>25721</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>333064</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christine Harris</PersonNm>
        <TitleTxt>Supervisor of Accounting</TitleTxt>
        <BaseCompensationFilingOrgAmt>105530</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>31260</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>14588</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>151378</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Shannon Davis</PersonNm>
        <TitleTxt>Serviceman</TitleTxt>
        <BaseCompensationFilingOrgAmt>149565</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>29163</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>18467</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>197195</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Brad Ahlers</PersonNm>
        <TitleTxt>Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>143763</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>55343</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>18502</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>217608</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Brannon Dasch</PersonNm>
        <TitleTxt>Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>151865</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>16451</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>18286</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>186602</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jeffrey C Hope</PersonNm>
        <TitleTxt>Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>152127</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>36001</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>18490</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>206618</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christian Kinder</PersonNm>
        <TitleTxt>Serviceman</TitleTxt>
        <BaseCompensationFilingOrgAmt>144048</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>19909</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>18461</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>182418</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Members or stockholder classes and rights Part VI line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>Tri-County is a member owned electric Cooperative.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Member election for additional members 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>Governing body decisions Part VI line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>Cooperative members ratify all bylaw changes.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>The Supervisor of Accounting reviews and verifies that figures agree to the Cooperatives 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>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Conflict of interest forms ar completed by employees and board members annually.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CEO executive director top management comp 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>Other officer or key employee compensation 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>Governing documents etc available to public 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. Financial 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>Explanation of other changes in net assets or fund balances Part XI line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Margins Assigned to Member $ 3,643,999Other Changes $ 1,759,768Retirement of Capital Credits $ -1,133,360 Total $ 4,270,407</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part IX response or note to any line in Part IX</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part IX, Line 4The instructions to the 2023 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, 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>