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        <TotalAmt>402702</TotalAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>344147</TotalAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>117750</TotalAmt>
      </PayrollTaxesGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>36525</TotalAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>8600</TotalAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>14075</TotalAmt>
      </FeesForServicesAccountingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>56573</TotalAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>113235</TotalAmt>
      </InformationTechnologyGrp>
      <TravelGrp>
        <TotalAmt>18090</TotalAmt>
      </TravelGrp>
      <InterestGrp>
        <TotalAmt>911197</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>1380972</TotalAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>78225</TotalAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Cost of Power</Desc>
        <TotalAmt>9964953</TotalAmt>
        <ProgramServicesAmt>9964953</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Maintenance &amp; Distribution</Desc>
        <TotalAmt>771281</TotalAmt>
        <ProgramServicesAmt>771281</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Operations</Desc>
        <TotalAmt>360705</TotalAmt>
        <ProgramServicesAmt>360705</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Property Taxes</Desc>
        <TotalAmt>146478</TotalAmt>
        <ProgramServicesAmt>146478</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>498818</TotalAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>16421583</TotalAmt>
        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>420199</BOYAmt>
        <EOYAmt>316396</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>2157636</BOYAmt>
        <EOYAmt>3155455</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>1311498</BOYAmt>
        <EOYAmt>1237858</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>950427</BOYAmt>
        <EOYAmt>1145897</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>33313</BOYAmt>
        <EOYAmt>36107</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>46388528</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>19389920</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>24690679</BOYAmt>
        <EOYAmt>26998608</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>226089</BOYAmt>
        <EOYAmt>226089</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <InvestmentsProgramRelatedGrp>
        <BOYAmt>10689560</BOYAmt>
        <EOYAmt>10942012</EOYAmt>
      </InvestmentsProgramRelatedGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>838538</BOYAmt>
        <EOYAmt>799943</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>41317939</BOYAmt>
        <EOYAmt>44858365</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>6802929</BOYAmt>
        <EOYAmt>6532865</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>18044946</BOYAmt>
        <EOYAmt>20932310</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>24847875</BOYAmt>
        <EOYAmt>27465175</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowFASB117Ind>X</OrgDoesNotFollowFASB117Ind>
      <RtnEarnEndowmentIncmOthFndsGrp>
        <BOYAmt>16470064</BOYAmt>
        <EOYAmt>17393190</EOYAmt>
      </RtnEarnEndowmentIncmOthFndsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>16470064</BOYAmt>
        <EOYAmt>17393190</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>41317939</BOYAmt>
        <EOYAmt>44858365</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>928925</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>1341</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>-7140</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>true</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleD documentId="990D">
      <LandGrp>
        <OtherCostOrOtherBasisAmt>226110</OtherCostOrOtherBasisAmt>
        <BookValueAmt>226110</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>4580903</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1282700</DepreciationAmt>
        <BookValueAmt>3298203</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>41581515</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>18107220</DepreciationAmt>
        <BookValueAmt>23474295</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>26998608</TotalBookValueLandBuildingsAmt>
      <InvstProgramRelatedOrgGrp>
        <Desc>Tri State Patronage</Desc>
        <BookValueAmt>10256454</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>CFC Patronage</Desc>
        <BookValueAmt>275218</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Federated Patronage</Desc>
        <BookValueAmt>114814</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>SEDC Patronage</Desc>
        <BookValueAmt>70112</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>All Other Patronage</Desc>
        <BookValueAmt>48624</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Membership Investments</Desc>
        <BookValueAmt>176790</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <TotalBookValueProgramRltdAmt>10942012</TotalBookValueProgramRltdAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="990J">
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>false</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>false</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>false</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jeff Umplett</PersonNm>
        <TitleTxt>General Manager</TitleTxt>
        <BaseCompensationFilingOrgAmt>313860</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>61090</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>32758</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>407708</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Clint Getzfreid</PersonNm>
        <TitleTxt>General Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>136609</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>29427</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>23207</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>189243</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Randy Theasmeyer</PersonNm>
        <TitleTxt>Line Superintendent</TitleTxt>
        <BaseCompensationFilingOrgAmt>126457</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>35427</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>1492</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>163376</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Russell Burden</PersonNm>
        <TitleTxt>Line Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>120006</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>26992</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>23207</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>170205</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Joseph Herman</PersonNm>
        <TitleTxt>Line Foreman</TitleTxt>
        <BaseCompensationFilingOrgAmt>112898</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>29427</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>23207</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>165532</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Anthony Nelson</PersonNm>
        <TitleTxt>Lineman</TitleTxt>
        <BaseCompensationFilingOrgAmt>111497</BaseCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>26992</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>23207</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>161696</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="990L">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>William Bridges</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Director</RelationshipDescriptionTxt>
        <TransactionAmt>9964953</TransactionAmt>
        <TransactionDesc>Purchase of power</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Members or stockholder classes and rights Part VI line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>Members are individuals and businesses who receive electrical service from the cooperative.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Member election for additional members Part VI line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Each year, the Board of Directors appoints a nominating committee. A letter is sent to each member in the board district that will be electing a board member for the year noting if interested to submit name for nomination for director. The nominating committee meets and nominates a slate of candidates to run for election to the Board. The candidates are placed on a ballot and members of the organization vote from a written ballot that is submitted to an independent auditor (CPA) for tabulation. Voting is allowed in person at the annual meeting or by mail-in ballot.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>Management prepares the Form 990 and it is submitted to auditor for review and submittal to IRS. Board reviews filed document.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Policy #301 states that Big Horn will have the directors and employees annually disclose the conflict of interest by April 15 of each year. They are reviewed by the Board at the April meeting.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 availability to public Part VI line 18</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is available upon request at the main office located at 415 South Street, Basin, WY 82410</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization responds to member inquiries for information. A member can also inspect minutes of meetings, accounting records, and records of action of the board of directors. An annual financial statement is provided to all members. The bylaws are posted on the website and available at the office.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Audited by an independent accountant Part XII line 2b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Cooperatives financial statements have been audited by an independent accountant using a fiscal year ending May 31 of the respective year. The tax return is prepared on the calendar year and, as such, the last seven months of the calendar year are unaudited.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Explanation of other changes in net assets or fund balances Part XI line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Net change in donated capital $ (7,140)</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>