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  <xs:element id="lnt_CollectionsReinvestedInReceivables" abstract="false" name="CollectionsReinvestedInReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_SteamMember" abstract="true" name="SteamMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_FivePointThreeSevenFivePercentDebentureDueTwoThousandThirtyFourMember" abstract="true" name="FivePointThreeSevenFivePercentDebentureDueTwoThousandThirtyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lnt_CommonEquityTable" abstract="true" name="CommonEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="lnt_InvestmentInAtcMember" abstract="true" name="InvestmentInAtcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_DeferredProceedsOfReceivablesSold" abstract="false" name="DeferredProceedsOfReceivablesSold" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_RetailRequestTable" abstract="true" name="RetailRequestTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="lnt_AllowanceForDoubtfulAccountsReceivableSold" abstract="false" name="AllowanceForDoubtfulAccountsReceivableSold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_PurchasedPowerMember" abstract="true" name="PurchasedPowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_ScheduleOfAtcBillingsTableTextBlock" abstract="false" name="ScheduleOfAtcBillingsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="lnt_LongTermPurchaseCommitmentsOtherMember" abstract="true" name="LongTermPurchaseCommitmentsOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_FairValueOfDeferredProceedsOfReceivablesSold" abstract="false" name="FairValueOfDeferredProceedsOfReceivablesSold" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_TermLoanCreditAgreementMember" abstract="true" name="TermLoanCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_DeferredProceedsOfReceivablesSoldMember" abstract="true" name="DeferredProceedsOfReceivablesSoldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_InvestmentsBusinessLine1" abstract="false" name="InvestmentsBusinessLine1" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_CommonStockOustandingRollForward" abstract="true" name="CommonStockOustandingRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lnt_DebenturesMember" abstract="true" name="DebenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_CapitalPurchaseObligationMember" abstract="true" name="CapitalPurchaseObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_AmericanTransmissionCompanyLlcAtcMember" abstract="true" name="AmericanTransmissionCompanyLlcAtcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_TransmissionSalesCreditedMember" abstract="true" name="TransmissionSalesCreditedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_EffectiveTaxRateTable" abstract="true" name="EffectiveTaxRateTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="lnt_IncomeTaxTable" abstract="true" name="IncomeTaxTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="lnt_ScheduleOfCorporateServicesIntercompanyPayablesTableTextBlock" abstract="false" name="ScheduleOfCorporateServicesIntercompanyPayablesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="lnt_TermLoanCreditAgreementThroughMarchTwoThousandTwentyFiveMember" abstract="true" name="TermLoanCreditAgreementThroughMarchTwoThousandTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lnt_TaxRelatedMember" abstract="true" name="TaxRelatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_WplBillingsToAtcMember" abstract="true" name="WplBillingsToAtcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_ScheduleOfSalesOfAccountsReceivableCashProceedsAndRelatedCostsTableTextBlock" abstract="false" name="ScheduleOfSalesOfAccountsReceivableCashProceedsAndRelatedCostsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="lnt_NotionalAmountOfDerivativesLineItems" abstract="true" name="NotionalAmountOfDerivativesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lnt_SaleofAccountsReceivableProgramCapacityAvailable" abstract="false" name="SaleofAccountsReceivableProgramCapacityAvailable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lnt_OtherEquityMethodInvestmentsMember" abstract="true" name="OtherEquityMethodInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="lnt_RegulatoryMattersLineItems" abstract="true" name="RegulatoryMattersLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lnt_OtherReceivablesSoldAmount" abstract="false" name="OtherReceivablesSoldAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
