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>55474</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>1000</noOfUnitsSold>
        <aggregateMarketValue>44220.00</aggregateMarketValue>
        <noOfUnitsOutstanding>9918711</noOfUnitsOutstanding>
        <approxSaleDate>10/15/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/31/2020</acquiredDate>
        <natureOfAcquisitionTransaction>LTIP</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1000</amountOfSecuritiesAcquired>
        <paymentDate>03/31/2020</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Megan Kendrick</name>
          <address>
            <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>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/16/2024</saleDate>
        <amountOfSecuritiesSold>1000</amountOfSecuritiesSold>
        <grossProceeds>42370.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>Shares that were sold were sold pursuant to a Rule 10B5-1 trading plan</remarks>
      <noticeSignature>
        <noticeDate>10/15/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>06/10/2024</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": 3713}]
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
  55474
  1000
  44220.00
  9918711
  10/15/2024
  NASDAQ
  Common
  03/31/2020
  LTIP
  Issuer
  N
  1000
  03/31/2020
  N/A
  N
  Megan Kendrick
  201 NE Park Plaza Drive
  Suite 100
  Vancouver
  WA
  98684
  Common
  09/16/2024
  1000
  42370.00
  Shares that were sold were sold pursuant to a Rule 10B5-1 trading plan
  10/15/2024
  06/10/2024
  /s/ Alexander Meginnes as a duly authorized representative of Ameriprise Financial Services Inc, as attorney-in-fact for Megan Kendrick