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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>JOEL VAN EGDOM HAS A BUSINESS RELATIONSHIP WTIH RONALD HEEMSTRA AND ERIC JENSEN.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THIS IS A TRUST ESTABLISHED BY HARBOR GROUP, INC. AND INTERSTATES CONSTRUCTION SERVICES, INC. AND ITS AFFILIATES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUSTEES REVIEW THE FORM 990 PRIOR TO FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUST DOES NOT COMPENSATE ANY OF THE TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE NOT AVAILABLE FOR PUBLIC INSPECTION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043500001">
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          <BusinessNameLine1Txt>INTERSTATES INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>51250</ZIPCd>
        </USAddress>
        <EIN>420932098</EIN>
        <PrimaryActivitiesTxt>ELECTRICAL CONTRACTING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>HARBOR GROUP INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>51250</ZIPCd>
        </USAddress>
        <EIN>421492435</EIN>
        <PrimaryActivitiesTxt>PARENT COMPANY</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
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      <IdRelatedOrgTxblCorpTrGrp>
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          <BusinessNameLine1Txt>INTERSTATE ENGINEERING INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>51250</ZIPCd>
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        <EIN>421480811</EIN>
        <PrimaryActivitiesTxt>ELECTRICAL ENGINEERING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
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      <IdRelatedOrgTxblCorpTrGrp>
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          <BusinessNameLine1Txt>INTERSTATES CONTROL SYSTEMS INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
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        <PrimaryActivitiesTxt>INACTIVE</PrimaryActivitiesTxt>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>IEEC TRANSPORTATION &amp; LEASING CO</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>51250</ZIPCd>
        </USAddress>
        <EIN>421278091</EIN>
        <PrimaryActivitiesTxt>AUTO AND AIRPLANE LEASING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
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        <EntityTypeTxt>C</EntityTypeTxt>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>INTERFAB LLC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
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          <AddressLine1Txt>PO BOX 260 1400 7TH AVE NE</AddressLine1Txt>
          <CityNm>SIOUX CENTER</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>51250</ZIPCd>
        </USAddress>
        <EIN>262960994</EIN>
        <PrimaryActivitiesTxt>INACTIVE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</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>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>1</TransferFromOtherOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE R, PART IV</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOLLOWING CORPORATIONS BECAME INACTIVE EFFECTIVE JANUARY 1, 2020: INTERSTATES CONTROL SYSTEM, INC. INTERFAB, LLC</ExplanationTxt>
      </SupplementalInformationDetail>
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  </ReturnData>
</Return>
