UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING	OMB APPROVAL
	OMB Number:             3235-0058 Expires:                   May 31, 2012 Estimated average burden hours per response ………….……2.50
	SEC FILE NUMBER 0-27140
	CUSIP NUMBER 667746101

(Check One)	x  Form 10-K    ¨  Form 20-F    ¨   Form 11-K    ¨  Form 10-Q ¨  Form 10-D    ¨  Form N-SAR    ¨  Form N-CSR
	For Period Ended: December 31, 2009
	¨  Transition Report on Form 10-K
	¨  Transition Report on Form 20-F
	¨  Transition Report on Form 11-K
	¨  Transition Report on Form 10-Q
	¨  Transition Report on Form N-SAR
	For the Transition Period Ended:

Read Instruction (on back page) Before Preparing Form. Please Print or Type.

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:             

PART I – REGISTRANT INFORMATION

Northwest Pipe Company

Full Name of Registrant

Former Name if Applicable

5721 SE Columbia Way, Suite 200

Address of Principal Executive Office (Street and Number)

Vancouver, WA 98661

City, State and Zip Code

PART II – RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

¨	(a)	The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense.
	(b)	The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filled on or before the fifth calendar day following the prescribed due date; and
	(c)	The accountant’s statement or other exhibit is required by Rule 12b-25(c) has been attached if applicable.

PART III – NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period. (Attach Extra Sheets if Needed)

As previously disclosed, the Audit Committee of the Board of Directors of Northwest Pipe Company (the “Company”), with the assistance of independent professionals, is conducting an ongoing internal investigation of certain accounting matters, including certain revenue recognition practices. Pending the completion of the Audit Committee’s investigation, the Company is unable to complete the preparation of its Annual Report on Form 10-K for the year ended December 31, 2009 (the “Form 10-K”), including the consolidated financial statements required to be presented in the Form 10-K. The Company plans to file the Form 10-K as soon as practicable after the completion of the Audit Committee’s investigation, the completion of any additional accounting work required as a result of the Audit Committee’s investigation, the completion of the Company’s consolidated financial statements for the year ended December 31, 2009 and the completion of the audit of such consolidated financial statements by the Company’s independent registered public accountants. The Company does not expect that the Form 10-K will be filed before the fifteenth calendar day following its original due date as prescribed by Rule 12b-25.

PART IV – OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification

Stephanie J. Welty	(360)	397-6323
(Name)	(Area Code)	(Telephone Number)

(2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, identify report(s).    Yes  ¨    No  x

As previously disclosed, the Company has not yet filed its Quarterly Report on Form 10-Q for the quarter ended September 30, 2009

(3) Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?    Yes  ¨    No  ¨ * See footnote

If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

* Pending completion of the Audit Committee’s internal investigation described above, the completion of any additional accounting work required as a result of the Audit Committee’s investigation, the completion of the Company’s consolidated financial statements for the year ended December 31, 2009, and the completion of the audit of such consolidated financial statements by the Company’s independent registered public accountants, the Company is unable to provide a reasonable estimate of its results of operations for the year ended December 31, 2009.

Northwest Pipe Company

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

Date:	March 16, 2010	By:	/s/    Stephanie J. Welty
			Stephanie J. Welty, Senior Vice President and Chief Financial Officer

INSTRUCTION: The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other that an executive officer), evidence of the representative’s authority to sign on behalf of the registrant shall be filed with the form.

	ATTENTION
Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).

GENERAL INSTRUCTIONS

1. This form is required by Rule 12b-25 (17 CFR 240.12b-25) of the General Rules and Regulations under the Securities Exchange Act of 1934.

2. One signed original and four conformed copies of this form and amendments thereto must be completed and filed with the Securities and Exchange Commission, Washington, D.C. 20549, in accordance with Rule 0-3 of the General Rules and Regulations under the Act. The information contained in or filed with the form will be made a matter of public record in the Commission files.

3. A manually signed copy of the form and amendments thereto shall be filed with each national securities exchange on which any class of securities of the registrant is registered.

4. Amendments to the notifications must also be filed on Form 12b-25 but need not restate information that has been correctly furnished. The form shall be clearly identified as an amended notification.

5. Electronic Filers: This form shall not be used by electronic filers unable to timely file a report solely due to electronic difficulties. Filers unable to submit reports within the time period prescribed due to difficulties in electronic filing should comply with either Rule 201 or Rule 202 of Regulations S-T (§232.201 or §232.202 of this chapter) or apply for an adjustment in filing date pursuant to Rule 13(b) of Regulations S-T (§232.13(b) of this chapter).

6. Interactive data submissions. This form shall not be used by electronic filers with respect to the submission or posting of an Interactive Data File (§232.11 of this chapter). Electronic filers unable to submit or post an Interactive Data File within the time period prescribed should comply with either Rule 201 or 202 of Regulation S-T (§232.201 and §232.202 of this chapter).

SEC 1344 (04-09) Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

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