content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001445525</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001001385</issuerCik>
        <issuerName>NORTHWEST PIPE CO</issuerName>
        <secFileNumber>000-27140</secFileNumber>
        <issuerAddress>
          <com:street1>201 NE PARK PLAZA DRIVE</com:street1>
          <com:street2>SUITE 100</com:street2>
          <com:city>VANCOUVER</com:city>
          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98684</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>3603976250</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kendrick Megan A.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Ameriprise Financial Services Inc</name>
          <address>
            <com:street1>2865 Ameriprise Financial Center</com:street1>
            <com:city>Minneapolis</com:city>
            <com:stateOrCountry>MN</com:stateOrCountry>
            <com:zipCode>55403</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>1000</noOfUnitsSold>
        <aggregateMarketValue>42370.00</aggregateMarketValue>
        <noOfUnitsOutstanding>9918711</noOfUnitsOutstanding>
        <approxSaleDate>09/16/2024</approxSaleDate>
        <securitiesExchangeName>Nasdaq</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/15/2015</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>68</amountOfSecuritiesAcquired>
        <paymentDate>01/15/2015</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/15/2016</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>67</amountOfSecuritiesAcquired>
        <paymentDate>01/15/2016</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>01/15/2017</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>31</amountOfSecuritiesAcquired>
        <paymentDate>01/15/2017</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/31/2020</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>447</amountOfSecuritiesAcquired>
        <paymentDate>03/31/2020</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/31/2022</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>387</amountOfSecuritiesAcquired>
        <paymentDate>03/31/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>Shares that were sold were sold pursuant to a Rule 10B5-1 trading plan</remarks>
      <noticeSignature>
        <noticeDate>09/16/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>09/16/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Alexander Meginnes as a duly authorized representative of Ameriprise Financial Services Inc, as attorney-in-fact for Megan Kendrick</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 5104}]
text: 144
  0001445525
  XXXXXXXX
  LIVE
  0001001385
  NORTHWEST PIPE CO
  000-27140
  201 NE PARK PLAZA DRIVE
  SUITE 100
  VANCOUVER
  WA
  98684
  3603976250
  Kendrick Megan A.
  Officer
  Common
  Ameriprise Financial Services Inc
  2865 Ameriprise Financial Center
  Minneapolis
  MN
  55403
  1000
  42370.00
  9918711
  09/16/2024
  Nasdaq
  Common
  01/15/2015
  LTIP
  Issuer
  N
  68
  01/15/2015
  N/A
  Common
  01/15/2016
  LTIP
  Issuer
  N
  67
  01/15/2016
  N/A
  Common
  01/15/2017
  LTIP
  Issuer
  N
  31
  01/15/2017
  N/A
  Common
  03/31/2020
  LTIP
  Issuer
  N
  447
  03/31/2020
  N/A
  Common
  03/31/2022
  LTIP
  Issuer
  N
  387
  03/31/2022
  N/A
  Y
  Shares that were sold were sold pursuant to a Rule 10B5-1 trading plan
  09/16/2024
  09/16/2024
  /s/ Alexander Meginnes as a duly authorized representative of Ameriprise Financial Services Inc, as attorney-in-fact for Megan Kendrick