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  <element id="mlm_RoadPavingMember" name="RoadPavingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="mlm_DomesticMember" name="DomesticMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="mlm_ForeignMember" name="ForeignMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="mlm_IncreaseDecreaseInAccruedSalariesBenefitsAndPayrollTaxes" name="IncreaseDecreaseInAccruedSalariesBenefitsAndPayrollTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="mlm_IncreaseDecreaseInAccruedInsuranceAndOtherTaxes" name="IncreaseDecreaseInAccruedInsuranceAndOtherTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="mlm_IncreaseDecreaseInAccruedSeverancePay" name="IncreaseDecreaseInAccruedSeverancePay" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
</schema>
