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        <ExclusionAmt>16150</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>Patronage Dividend Inc</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>22266</TotalRevenueColumnAmt>
        <ExclusionAmt>22266</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>Miscellaneous Income</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>5066</TotalRevenueColumnAmt>
        <ExclusionAmt>5066</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>27332</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>5232463</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1860301</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>59690</ExclusionAmt>
      </TotalRevenueGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>189166</TotalAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>394654</TotalAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>30458</TotalAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>73960</TotalAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>47285</TotalAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>4145</TotalAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>23826</TotalAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>43174</TotalAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>5620</TotalAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>50720</TotalAmt>
      </OfficeExpensesGrp>
      <OccupancyGrp>
        <TotalAmt>17354</TotalAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>127047</TotalAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>9839</TotalAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>39433</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>58828</TotalAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>43278</TotalAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Water Treatment &amp; Distr</Desc>
        <TotalAmt>397384</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Bad Debt</Desc>
        <TotalAmt>10204</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Miscellaneous</Desc>
        <TotalAmt>5407</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Construction</Desc>
        <TotalAmt>3127</TotalAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>1574909</TotalAmt>
      </TotalFunctionalExpensesGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>1261907</BOYAmt>
        <EOYAmt>1260083</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
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        <EOYAmt>1539344</EOYAmt>
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      <AccountsReceivableGrp>
        <BOYAmt>209502</BOYAmt>
        <EOYAmt>186297</EOYAmt>
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      <InventoriesForSaleOrUseGrp>
        <BOYAmt>107489</BOYAmt>
        <EOYAmt>197740</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>48429</BOYAmt>
        <EOYAmt>56634</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>80218799</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>15207789</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>61994948</BOYAmt>
        <EOYAmt>65011010</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>1490729</BOYAmt>
        <EOYAmt>1415517</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>354840</BOYAmt>
        <EOYAmt>363743</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <TotalAssetsGrp>
        <BOYAmt>68454059</BOYAmt>
        <EOYAmt>70030368</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>2979290</BOYAmt>
        <EOYAmt>1478410</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <EOYAmt>317509</EOYAmt>
      </DeferredRevenueGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>1574805</BOYAmt>
        <EOYAmt>1247979</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>4554095</BOYAmt>
        <EOYAmt>3043898</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrgDoesNotFollowSFAS117Ind>X</OrgDoesNotFollowSFAS117Ind>
      <CapStkTrPrinCurrentFundsGrp>
        <BOYAmt>57740698</BOYAmt>
        <EOYAmt>60482122</EOYAmt>
      </CapStkTrPrinCurrentFundsGrp>
      <PdInCapSrplsLandBldgEqpFundGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </PdInCapSrplsLandBldgEqpFundGrp>
      <RtnEarnEndowmentIncmOthFndsGrp>
        <BOYAmt>6159266</BOYAmt>
        <EOYAmt>6504348</EOYAmt>
      </RtnEarnEndowmentIncmOthFndsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>63899964</BOYAmt>
        <EOYAmt>66986470</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>68454059</BOYAmt>
        <EOYAmt>70030368</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>3657554</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>-571048</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>1</FederalGrantAuditRequiredInd>
      <FederalGrantAuditPerformedInd>1</FederalGrantAuditPerformedInd>
    </IRS990>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LandGrp>
        <OtherCostOrOtherBasisAmt>8200</OtherCostOrOtherBasisAmt>
        <BookValueAmt>8200</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>26505844</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>141281</DepreciationAmt>
        <BookValueAmt>26364563</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>380981</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>187625</DepreciationAmt>
        <BookValueAmt>193356</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>3112972</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1916947</DepreciationAmt>
        <BookValueAmt>1196025</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>50210802</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>12961936</DepreciationAmt>
        <BookValueAmt>37248866</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>65011010</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>1919991</TotalRevEtcAuditedFinclStmtAmt>
      <RevenueNotReportedAmt>0</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>1919991</RevenueSubtotalAmt>
      <OtherRevenuesNotIncludedAmt>3312472</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>3312472</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>5232463</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>1574909</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1574909</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1574909</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization is exempt from Federal income taxes under Section 501(c)(12) of the Internal Revenue Code of 1954. The Organization is annually required to file a Return of Organization Exempt from Income Tax (Form 990) with the IRS. The Organization has determined it is not subject to unrelated business income tax and has not filed an Exempt Organization Business Income Tax Return (Form 990T) with the IRS. The Organization believes that it has appropriate support for any tax positions taken affecting its annual filing requirements, and as such, does not have any uncertain tax positions that are material to the financial statements. The Organization would recognize future accrued interest and penalties related to unrecognized tax benefits and liabilities in income tax expense if such interest and penalties are incurred.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Grants reported as contributed capital on financial statements 3,312,472.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>There are members of the Organization but no member classes. Signers of water user agreements of the corporation and who pay their bills to the corporation, are its members.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Members of the Organization elect the board members. Only members of the Organization that are domestic users of water are entitled to vote.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>There are no committees that act on behalf of the governing board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Business Manager will review the Form 990 and inform the board members that the return is in the office for their review.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Board members with conflicts voluntarily remove themselves from voting on issues related to that item.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The governing documents, conflict of interest policy and financial statements are available to the public upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>Amortization of donated capital -571,048.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Mni Waste' Water Company</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO Box 490</AddressLine1Txt>
          <CityNm>Eagle Butte</CityNm>
          <StateAbbreviationCd>SD</StateAbbreviationCd>
          <ZIPCd>57625</ZIPCd>
        </USAddress>
        <EIN>272538595</EIN>
        <PrimaryActivitiesTxt>Tribally-chartered successor to the operations of Tri-County Water Assn</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>SD</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(12)</ExemptCodeSectionTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Cheyenne River Sioux Tribe</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>1</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>1</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>