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  <ferc:AttestationName id="Tag210" contextRef="C1">Russ Montgomery</ferc:AttestationName>
  <ferc:AttestationTitle id="Tag211" contextRef="C1">Vice President &amp; Controller</ferc:AttestationTitle>
  <ferc:CorporateOfficerCertificationSignature id="Tag212" contextRef="C1">Russ Montgomery</ferc:CorporateOfficerCertificationSignature>
  <ferc:AttestationDate id="Tag213" contextRef="C1">2025-06-02</ferc:AttestationDate>
  <ferc:FormType id="Tag214" contextRef="C1">6-Q</ferc:FormType>
  <ferc:RespondentLegalName id="Tag215" contextRef="C1">Cactus II Pipeline LLC</ferc:RespondentLegalName>
  <ferc:CompanyIdentifier id="Tag216" contextRef="C1">C010308</ferc:CompanyIdentifier>
  <ferc:ReportYear id="Tag217" contextRef="C1" unitRef="Pure" decimals="0">2025</ferc:ReportYear>
  <ferc:ReportPeriod id="Tag218" contextRef="C1">Q1</ferc:ReportPeriod>
  <ferc:AddressOfPrincipalOfficeAtEndOfPeriod id="Tag219" contextRef="C1">333 Clay Street, Suite 1600, Houston, Texas, 77002</ferc:AddressOfPrincipalOfficeAtEndOfPeriod>
  <ferc:NameOfContactPerson id="Tag220" contextRef="C1">Douglas Pearson</ferc:NameOfContactPerson>
  <ferc:TitleOfContactPerson id="Tag221" contextRef="C1">Manager of Joint Venture Accounting</ferc:TitleOfContactPerson>
  <ferc:AddressOfContactPerson id="Tag222" contextRef="C1">333 Clay Street, Suite 1600, Houston, Texas, 77002</ferc:AddressOfContactPerson>
  <ferc:TelephoneOfContactPerson id="Tag223" contextRef="C1">713-993-5275</ferc:TelephoneOfContactPerson>
  <ferc:SubmissionType id="Tag224" contextRef="C1">O</ferc:SubmissionType>
  <ferc:ReportDate id="Tag225" contextRef="C1">2025-06-02</ferc:ReportDate>
  <ferc:VendorName id="Tag226" contextRef="C1">IRIS Carbon</ferc:VendorName>
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        <xhtml:p>Current year distributions were $73,574,000, which exceeded the positive balance in unappropriated retained income by $26,059,729 as of March 31, 2025. Such excess was recorded against additional paid-in capital.</xhtml:p>
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        <xhtml:p>Current year distributions were $73,574,000, which exceeded the positive balance in unappropriated retained income by $26,059,729 as of March 31, 2025. Such excess was recorded against additional paid-in capital.</xhtml:p>
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