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      <OtherRevenueMiscGrp>
        <Desc>PATRONAGE CAPITAL INCOME</Desc>
        <BusinessCd>221000</BusinessCd>
        <TotalRevenueColumnAmt>61199</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>61199</RelatedOrExemptFuncIncomeAmt>
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      <OtherRevenueMiscGrp>
        <Desc>TRANSMISSION WHEELING</Desc>
        <BusinessCd>221000</BusinessCd>
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        <ExclusionAmt>56901</ExclusionAmt>
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        <ManagementAndGeneralAmt>1787</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>49668</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>44455</ManagementAndGeneralAmt>
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        <TotalAmt>28642</TotalAmt>
        <ManagementAndGeneralAmt>28642</ManagementAndGeneralAmt>
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        <TotalAmt>621209</TotalAmt>
        <ProgramServicesAmt>621209</ProgramServicesAmt>
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        <ProgramServicesAmt>1547609</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>14539</ManagementAndGeneralAmt>
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        <Desc>INCOME TAXES- MONTANA E</Desc>
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        <ManagementAndGeneralAmt>215000</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>PURCHASE POWER</Desc>
        <TotalAmt>6513591</TotalAmt>
        <ProgramServicesAmt>6513591</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>DISTRIBUTION OPERATIONS</Desc>
        <TotalAmt>1596912</TotalAmt>
        <ProgramServicesAmt>1596912</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>DISTRIBUTION MAINTENANC</Desc>
        <TotalAmt>937286</TotalAmt>
        <ProgramServicesAmt>937286</ProgramServicesAmt>
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        <TotalAmt>1022189</TotalAmt>
        <ProgramServicesAmt>583428</ProgramServicesAmt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>CUSTOMER DEPOSITS</Desc>
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      <OtherLiabilitiesOrgGrp>
        <Desc>ACCRUED EXPENSES</Desc>
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      <OtherLiabilitiesOrgGrp>
        <Desc>POST RETIREMENT BENEFITS ACCRUAL</Desc>
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      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>DEFERRED INCOME TAXES</Desc>
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      <OtherLiabilitiesOrgGrp>
        <Desc>CUSTOMERS ENERGY PREPAYMENTS</Desc>
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      <TotalLiabilityAmt>2008524</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>14752668</TotalRevEtcAuditedFinclStmtAmt>
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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>13412717</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>699152</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>699152</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>14111869</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE ARE NO UNCERTAIN TAX POSITIONS EXISTING AT DECEMBER 31, 2017.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>CONTRIBUTION IN AID OF CONSTRUCTION RECEIVED FROM MEMBERS FOR PLANT CONSTRUC</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>CAPITAL CREDITS PAID TO MEMBERS- MEMBERS BENEFITS</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART VI LINE 1E OTHER PROPERTY</FormAndLineReferenceDesc>
        <ExplanationTxt>PART VI- LINE 1E-OTHER PROPERTY- INCLUDES $4,051,538 OF TRANSMISSION POLES, WIRE AND STATION EQUIPMENT; $43,122,035 OF DISTRIBUTION STATION EQUIPMENT, POLES, WIRE, TRANSFORMERS AND METERS; $469,188 OF CONSTRUCTION WORK IN PROCESS AND INTANGIBLE PLANT OF $649,122.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROLLIE MILLER</PersonNm>
        <TitleTxt>GENERAL MANAGER</TitleTxt>
        <BaseCompensationFilingOrgAmt>162833</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>45669</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20775</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>229277</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COOPERATIVE HAS 5,678 ELIGIBLE VOTING MEMBERS AT DECEMBER 31, 2017.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERSHIP ELECTS THREE BOARD OF DIRECTORS TO SERVE A THREE YEAR TERM AT THE COOPERATIVE ANNUAL MEETING HELD IN MARCH OF EACH YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL BYLAW CHANGES RECOMMENDED BY THE BOARD OF DIRECTORS ARE APPROVED BY THE MEMBERSHIP AT THE COOPERATIVE ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS REVIEWED AND APPROVED BY THE BOARD PRESIDENT AND SECRETARY/TREASURER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, EACH BOARD MEMBER CERTIFIES ANY CONFLICT OF INTEREST AND NECESSARY DISCLOSURES WHICH IS DOCUMENTED IN THE MONTHLY BOARD MEETING MINUTES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF DIRECTORS SETS WAGES USING MONTANA STATEWIDE ORGANIZATION-MONTANA ELECTRIC COOPERATIVE ASSOICATION (MECA) ANNUAL SALARY SURVEY WHICH LISTS THE SALARY RANGE FOR ALL COOPERATIVE JOB BY CLASSIFICATION. THE COOPERATIVE LINEMEN SALARIES ARE ESTABLISHED BY A SIGNED COLLECTIVELY BARGAINED UNION CONTRACT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL GOVERNING DOCUMENTS, POLICIES, AND FINANCIAL REPORTS- RUS FORM 7 - ARE AVAILABLE UPON REQUEST AT THE COOPERATIVE HEADQUARTER OFFICE. ALSO BYLAWS AND HANDBOOKS ARE GIVEN TO EVERY NEW MEMBER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THIS PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
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        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>300 CLEVERLEY DRIVE</AddressLine1Txt>
          <CityNm>DILLON</CityNm>
          <StateAbbreviationCd>MT</StateAbbreviationCd>
          <ZIPCd>59725</ZIPCd>
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        <LegalDomicileStateCd>MT</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>VIGILANTE ELECTRIC COOPERATIVE INC OWNS 50</BusinessNameLine1Txt>
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        <GeneralOrManagingPartnerInd>1</GeneralOrManagingPartnerInd>
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          <BusinessNameLine1Txt>MONTANA ENERGY ALLIANCE PAID VIGILANTE ELECTRIC FOR SHARED POSTAGE</BusinessNameLine1Txt>
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        <MethodOfAmountDeterminationTxt>COST</MethodOfAmountDeterminationTxt>
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        <OtherOrganizationName>
          <BusinessNameLine1Txt>MONTANA ENERGY ALLIANCE PAID PARTNERSHIP DISTRIBUTIONS OF PROFITS</BusinessNameLine1Txt>
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        <MethodOfAmountDeterminationTxt>DISTRIBUTION- CASH</MethodOfAmountDeterminationTxt>
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</Return>