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      <Form990PartVIISectionAGrp>
        <PersonNm>Brad Bierstedt</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>4</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>12801</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Blaine Warzecha</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHoursPerWeekRt>5</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>11996</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Jim Coleman</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>6</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>2145</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Avan Irani</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>6</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Gary Raybon</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>6</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>2209850</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>434885</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>71</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>North American Construction Group</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <ForeignAddress>
            <AddressLine1Txt>27287 100th Avenue</AddressLine1Txt>
            <CityNm>Acheson</CityNm>
            <ProvinceOrStateNm>Alberta</ProvinceOrStateNm>
            <CountryCd>CA</CountryCd>
            <ForeignPostalCd>T7X6H8</ForeignPostalCd>
          </ForeignAddress>
        </ContractorAddress>
        <ServicesDesc>Mining Contractor</ServicesDesc>
        <CompensationAmt>69357366</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Siemens Energy</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>DEPT CH 10169</AddressLine1Txt>
            <CityNm>PALATINE</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60055</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Turbine rebuild contractor</ServicesDesc>
        <CompensationAmt>3948042</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>GIS Construction</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1821 N Port Avenue</AddressLine1Txt>
            <CityNm>Corpus Christi</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>78401</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Contract Labor</ServicesDesc>
        <CompensationAmt>3246716</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Holt Cat</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>po box 650345</AddressLine1Txt>
            <CityNm>dallas</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>75265</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Equipment contractor labor &amp; materials</ServicesDesc>
        <CompensationAmt>2505963</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>The Atlantic Group</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO Box 654068</AddressLine1Txt>
            <CityNm>Dallas</CityNm>
            <StateAbbreviationCd>TX</StateAbbreviationCd>
            <ZIPCd>75265</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Contract Labor</ServicesDesc>
        <CompensationAmt>5173114</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>132</CntrctRcvdGreaterThan100KCnt>
      <FederatedCampaignsAmt>0</FederatedCampaignsAmt>
      <MembershipDuesAmt>0</MembershipDuesAmt>
      <FundraisingAmt>0</FundraisingAmt>
      <RelatedOrganizationsAmt>0</RelatedOrganizationsAmt>
      <GovernmentGrantsAmt>0</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>0</AllOtherContributionsAmt>
      <NoncashContributionsAmt>0</NoncashContributionsAmt>
      <TotalContributionsAmt>0</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>Generation of Electricity</Desc>
        <BusinessCd>221000</BusinessCd>
        <TotalRevenueColumnAmt>175872850</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>175872850</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
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        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </TotalOthProgramServiceRevGrp>
      <TotalProgramServiceRevenueAmt>175872850</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>6072762</ExclusionAmt>
      </InvestmentIncomeGrp>
      <IncmFromInvestBondProceedsGrp>
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        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
      </IncmFromInvestBondProceedsGrp>
      <RoyaltiesRevenueGrp>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>135784</ExclusionAmt>
      </RoyaltiesRevenueGrp>
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        <PersonalAmt>0</PersonalAmt>
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      <OtherRevenueMiscGrp>
        <Desc>Sales of SO2 - Emmissions Allowance</Desc>
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      <OtherRevenueMiscGrp>
        <Desc>Transmission</Desc>
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        <RelatedOrExemptFuncIncomeAmt>1573684</RelatedOrExemptFuncIncomeAmt>
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      <OtherRevenueMiscGrp>
        <Desc>Deferred Revenues</Desc>
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      <MiscellaneousRevenueGrp>
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      <TotalRevenueGrp>
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    <IRS990ScheduleD documentId="R000002" softwareId="23018249" softwareVersionNum="v1.00">
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        <BookValueAmt>94516118</BookValueAmt>
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      <InvstProgramRelatedOrgGrp>
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        <MethodValuationCd>F</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Ash Pond Cleanout Funds</Desc>
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      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
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        <MethodValuationCd>F</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
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        <MethodValuationCd>F</MethodValuationCd>
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      <OtherLiabilitiesOrgGrp>
        <Desc>Accumulated Provisions for Mine Closure</Desc>
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      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>Asset Retirement Obligation</Desc>
        <Amt>5418294</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>28698690</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>178743731</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>0</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>0</DonatedServicesAndUseFcltsAmt>
      <RecoveriesPriorYearGrantsAmt>0</RecoveriesPriorYearGrantsAmt>
      <OtherRevenueAmt>0</OtherRevenueAmt>
      <RevenueNotReportedAmt>0</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>178743731</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>0</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>6208545</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>6208545</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>184952276</TotalRevenuePerForm990Amt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>ASC topic #740, "Income Taxes" requires that an enterprise cannot recognize a tax benefit in its financial statements unless it concludes that it is "more likely than not: that the benefit will be sustained on audit by the taxing authority". Tax-exempt and not-for-profit enterprises are also within the scope of the ASC, since the decision that some or all of an enterprise's activities are not subject to income taxes is itself a tax position for which the interpretation requires evaluation. At adoption, and annually thereafter, San Miguel applies the requirements to all tax positions for which the statute of limitations remained open. San Miguel recognizes the financial benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. San Miguel Electric Cooperative, Inc. was determined by the Internal Revenue Service to be an exempt cooperative for purposes of federal income taxes, under Section 501(c)(12) of the Internal Revenue code, in years when receipts from members, for the purpose of meeting losses and expenses, are at lease 85 percent of the total income. The amount of unrecognized tax benefits as of December 31, 2023, was zero.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XI, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>See general explanations on Schedule O for form 990-part 1 line 19.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part XII, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>See general explanations on Schedule O for form 990-part 1 line 19.</ExplanationTxt>
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        <PersonNm>Craig Courter</PersonNm>
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        <PersonNm>David Burris</PersonNm>
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        <PersonNm>Derrick Brummett</PersonNm>
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        <PersonNm>David Loeffler</PersonNm>
        <TitleTxt>Class A Mechanic</TitleTxt>
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        <PersonNm>Derek Burns</PersonNm>
        <TitleTxt>Plant Manager</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Benino Ramirez</PersonNm>
        <TitleTxt>Mechanic Crew A</TitleTxt>
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        <PersonNm>Patrick Rakowitz</PersonNm>
        <TitleTxt>Mechanic Leadman</TitleTxt>
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        <PersonNm>Vanessa Pawelek</PersonNm>
        <TitleTxt>Administrative Services Manager (May - Dec.)</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Santiago Carrasco</PersonNm>
        <TitleTxt>Electric Leadman</TitleTxt>
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        <OtherCompensationFilingOrgAmt>400</OtherCompensationFilingOrgAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>During 2023, a severance payment was issued to an officer. Such payment was not material to the financial position, nor to the overall mission of the Cooperative.</ExplanationTxt>
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        <IssuerName>
          <BusinessNameLine1Txt>Atascosa County Industrial Development Corp</BusinessNameLine1Txt>
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        <BondIssuerEIN>870810599</BondIssuerEIN>
        <CUSIPNum>046578AC4</CUSIPNum>
        <BondIssuedDt>2020-06-18</BondIssuedDt>
        <IssuePriceAmt>62540000</IssuePriceAmt>
        <PurposeDesc>To redeem 2008 Series Pollution Control Bonds</PurposeDesc>
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        <FormAndLineReferenceDesc>Schedule K, Part IV, Line 2c-06/18/2020 62,540,000 Atascosa County Industrial Development Corp</FormAndLineReferenceDesc>
        <ExplanationTxt>Atascosa County Industiral Development - Rebate calculation was updated June 18, 2020.</ExplanationTxt>
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    <IRS990ScheduleO documentId="R000005" softwareId="23018249" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>For the 2011 tax reporting year, the IRS made a significant change to the 990 instructions, whereby entitles exempt under 501 (c)(12) of the Internal Revenue Code are to report patronage dividend paid to their members on Part IX, Line 4. San Miguel being duly organized in the State of Texas and exempt under 501(c)(12) of the Internal Revenue Code operates on a cooperative, non-profit basis for the mutual benefit of its patrons. As such, all revenues or margins received in excess of operating costs are retained as equity and allocated a credit to each patron's capital account. Should the Board of Directors determine that the financial conditions of the Cooperative will not be impaired, and there are not requirements which restrict such distribution, the Board of Directors may choose to retire credits reflected in member accounts in part or in in full. Retirements of capital credits are restricted under San Miguel's current mortgage indenture until certain thresholds are met. San Miguel interprets the definition of "paid" to mean paid in money, property, or qualified written allocations: therefore, San Miguel is reporting as allocated, for the 2011 and all subsequent tax reporting years, all excess margins as paid to its patrons on an annual basis in accordance with the above referenced interpretations of the IRS instructions.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 1b</FormAndLineReferenceDesc>
        <ExplanationTxt>The decisions of the San Miguel Board of Directors are reported directly to the governing boards of the 10 member cooperatives. Certain contracts, i.e. wholesale power contracts are subject to the approval by the members of the 10 cooperatives.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>San Miguel Electric Cooperative, Inc (San Miguel) is a not-for-profit cooperative corporation organized for the purpose of generating electric power. San Miguel sells power pursuant to a wholesale power contract with South Texas Electric Cooperative, Inc (South Texas), which is a generation of transmission cooperative. South Texas in turn, sells power at wholesale to their 10 member cooperatives, all of which are distribution cooperatives providing retail service to their member-customers.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>San Miguel is governed by a board of 19 directors, each of whom is selected by and represents one of the 10 member cooperatives. The directors are elected annually at the San Miguel Annual Meeting.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>The decisions of the San Miguel Board of Directors are reported directly to the governing boards for the member cooperatives. Certain contracts, i.e., wholesale power contracts are subject to the approval by the members of the cooperatives.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of the draft IRS Form 990 was provided to each of the current board members for the July 2024 meeting. Company personnel reviewed the form 990 at the Finance and Audit Commitee meeting on July 18, 2024, with the full board present. Board members were given an opportunity to ask any questions prior to the filing of the return.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The San Miguel Board of Directors approved a Conflict-of-Interest Policy on December 10,2008. Since then, the policy has been amended on 07/21/2017 and 8/19/2022. The policy requires each "member of the Board of Directors, the General Manager, General Counsel and all Department Managers to file with the President of the Board of Directors, a Disclosure Report within (30) days after attaining such a position or status and then annually thereafter". The policy further specifies that "The President of the Board of Directors shall report no later than the regular March monthly Board meeting each year that he or she has received disclosure reports from all reporting persons signed and dated by February 15th of the current year". The disclosure report includes questions regarding each person's personal and business relationships and any potential claims against San Miguel. In accordance with policy requirements, the above-mentioned parties are asked to complete and sign both the disclosure report and/or the conflict-of-interest report on an annual basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The Salaries of all officers are based on a national survey for similar positions in the utility industry and recommended by an independent management consulting agency.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>As San Miguel has outstanding loan funds guaranteed by the Rural Utilities Service, the financial statements are a matter of public record and are provided to individuals upon request. We do not typically make San Miguel's governing documents or conflict of interest policy available to the public.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VII, Section A, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>See general explanation on Schedule O for Form 990, Part VI, Section B, Line 15.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>See general explanation on Schedule O for core Form 990, Part I, Line 19.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>See general explanations on schedule O for form 990</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>As part of the Brazos Transaction, funds were received in advance for Brazos' portion or debt obligations. During 2023, $1,135,019 of original debt obligations was amortized. As referenced on Schedule O, Part 1, Line 19, San Miguel's margins received in excess of operating costs are retained as equity and allocated as a credit to each patron's capital account. The amount of margins retained in 2023 was $4,434,619. The net margins and prepaid debt netted to $3,299,601.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c</FormAndLineReferenceDesc>
        <ExplanationTxt>Yes, the organization does have a committee that assumes responsibility for oversight of the audit, but no changes in its oversight process or selection has occurred during 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <ReasonableCauseExplanation documentId="R000006" softwareId="23018249" softwareVersionNum="v1.00">
      <ExplanationTxt>Filing was not late extension was filed and approved before due date.</ExplanationTxt>
    </ReasonableCauseExplanation>
  </ReturnData>
</Return>