##### Table of Contents





UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549





FORM 10-Q/A

xAmendment No. 1







|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended: March 31, 2011

OR



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from
            to

Commission File Number: 0-27140





NORTHWEST PIPE
COMPANY

(Exact name of registrant as specified in its charter)







|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|OREGON                                                         |  | 93-0557988                          
|(State or other jurisdiction of
incorporation or organization) |  | (I.R.S. Employer Identification No.)

5721 SE Columbia Way

Suite 200

Vancouver, Washington 98661

(Address of principal executive offices and zip code)

360-397-6250

(Registrants telephone number including area code)





Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days:    Yes  x    No   ̈

Indicate
by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter)
during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes   ̈    No   ̈

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer,
a non-accelerated filer, or a smaller reporting company. See definitions of large accelerated filer, accelerated filer, and smaller reporting company in Rule 12b-2 of the Exchange Act. (Check one):



|                        |  |   |  |                           |  |  
|----------------------- |  | - |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈ |  | Accelerated filer         |  | x
|                        |  |   | 
|Non-accelerated filer   |  |  ̈ |  | Smaller reporting company |  |  ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  x



|                                       |  |                                       
|-------------------------------------- |  | --------------------------------------
|Common Stock, par value $.01 per share |  | 9,371,111                             
|(Class)                                |  | (Shares outstanding at April 23, 2012)









---

##### Table of Contents

NORTHWEST PIPE COMPANY

FORM 10-Q/A

INDEX



|                                                                                                                                |  |      |    | 
|------------------------------------------------------------------------------------------------------------------------------- |  | ---- | -- | 
|                                                                                                                                |  | Page |   
|PART I - FINANCIAL INFORMATION                                                                                                  |  |      |    | 
|                                                                                                                                | 
|Item 1. Financial Statements:                                                                                                   |  |      |    | 
|                                                                                                                                | 
|Condensed Consolidated Balance Sheets as of March 31, 2011 (as Restated) and December 
31, 2010 (as Restated)                   |  |      | 3  | 
|                                                                                                                                | 
|Condensed Consolidated Statements of Operations for the three months ended March 
31, 2011 (as Restated) and 2010 (as Restated) |  |      | 4  | 
|                                                                                                                                | 
|Condensed Consolidated Statements of Cash Flows for the three months ended March 
31, 2011 (as Restated) and 2010 (as Restated) |  |      | 5  | 
|                                                                                                                                | 
|Notes to Condensed Consolidated Financial Statements                                                                            |  |      | 6  | 
|                                                                                                                                | 
|Item 2. Managements Discussion and Analysis of Financial Condition and Results of
Operations                                   |  |      | 21 | 
|                                                                                                                                | 
|Item 3. Quantitative and Qualitative Disclosures About Market Risk                                                              |  |      | 25 | 
|                                                                                                                                | 
|Item 4. Controls and Procedures                                                                                                 |  |      | 25 | 
|                                                                                                                                | 
|PART II - OTHER INFORMATION                                                                                                     |  |      |    | 
|                                                                                                                                | 
|Item 1. Legal Proceedings                                                                                                       |  |      | 27 | 
|                                                                                                                                | 
|Item 1A. Risk Factors                                                                                                           |  |      | 28 | 
|                                                                                                                                | 
|Item 6. Exhibits                                                                                                                |  |      | 28 | 
|                                                                                                                                | 
|Signatures                                                                                                                      |  |      | 29 | 



1



---

##### Table of Contents

EXPLANATORY NOTE

In this Quarterly Report Amendment No. 1 on Form 10-Q/A for the quarter ended March 31, 2011 (the March 2011 Form 10-Q/A), Northwest Pipe Company (the Company) is
restating its previously reported unaudited condensed consolidated financial statements as of March 31, 2011, and for the three months ended March 31, 2011 and March 31, 2010 as filed with the Securities and Exchange Commission (the
SEC) on May 10, 2011 (the Original Filing) in Part IItem 1, Financial Statements to correct material errors identified in such previously issued financial statements. In this filing, the Company is also
updating Item 2, Managements Discussion and Analysis of Financial Condition and Results of Operations to reflect the effects of the restatement as it relates to March 31, 2011, and the three months ended March 31,
2011 and March 31, 2010. Except as required to reflect the effects of the restatement, no additional modifications or updates to the consolidated financial statements or data in this Form 10-Q/A have been made to the consolidated financial
statements or data for the three months ended March 31, 2011 or March 31, 2010 as filed in the Original Filing.

For further detail
on the financial statement impacts and the adjustments made as a result of the restatement, see Note 13 of the Condensed Consolidated Financial Statements in Part IItem 1, Financial Statements.

Concurrent with the filing of this March 2011 Form 10-Q/A, the Company is filing its Annual Report on Form 10-K for the year ended December 31, 2011
(the 2011 Form 10-K), which contains restated financial statements as of and for the years ended December 31, 2010 and December 31, 2009. The December 31, 2010 condensed consolidated balance sheet included in this March
2011 Form 10-Q/A reflects the restated information included in our 2011 Form 10-K. The Company is also concurrently filing its amended Quarterly Report on Form 10-Q/A for the quarter ended June 30, 2011 and its Quarterly Report on Form 10-Q for
the quarter ended September 30, 2011, which include the restatement of financial statements as of and for the three and six months ended June 30, 2011 and 2010 and as of and for the three and nine months ended September 30, 2010,
respectively.

Ineffectiveness of Internal Control over Financial Reporting and Disclosure Controls and Procedures

The Company has determined that certain material weaknesses in its internal controls continued to exist as of March 31, 2011. For a description of
the material weaknesses in its internal control over financial reporting and its plan to remediate those material weaknesses, see Part IItem 4, Controls and Procedures of this report. In addition, as a result of the existence of
material weaknesses in our internal controls, we have also concluded that our disclosure controls and procedures were not effective as of March 31, 2011.



2



---

##### Table of Contents

NORTHWEST PIPE COMPANY

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except share and per share data)



|                                                                                                                  |  |                          |         |   |                             |   |         |  
|----------------------------------------------------------------------------------------------------------------- |  | ------------------------ | ------- | - | --------------------------- | - | ------- | -
|                                                                                                                  |  | March 31,2011As Restated |         |   | December 31,2010As
Restated |  
|Assets                                                                                                            |  |                          |         |   |                             |   |         |  
|Current assets:                                                                                                   |  |                          |         |   |                             |   |         |  
|Cash and cash equivalents                                                                                         |  | $                        | 77      |   |                             | $ | 51      |  
|Trade and other receivables, less allowance for doubtful accounts of $1,784 and $2,151                            |  |                          | 71,438  |   |                             |   | 66,474  |  
|Costs and estimated earnings in excess of billings on uncompleted contracts                                       |  |                          | 54,439  |   |                             |   | 45,533  |  
|Inventories                                                                                                       |  |                          | 93,601  |   |                             |   | 80,887  |  
|Refundable income taxes                                                                                           |  |                          | 11,182  |   |                             |   | 15,099  |  
|Deferred income taxes                                                                                             |  |                          | 5,402   |   |                             |   | 6,293   |  
|Prepaid expenses and other                                                                                        |  |                          | 1,994   |   |                             |   | 2,163   |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total current assets                                                                                              |  |                          | 238,133 |   |                             |   | 216,500 |  
|Property and equipment, net                                                                                       |  |                          | 155,867 |   |                             |   | 154,274 |  
|Goodwill                                                                                                          |  |                          | 21,451  |   |                             |   | 21,451  |  
|Other assets                                                                                                      |  |                          | 22,423  |   |                             |   | 22,658  |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total assets                                                                                                      |  | $                        | 437,874 |   |                             | $ | 414,883 |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Liabilities and Stockholders Equity                                                                              |  |                          |         |   |                             |   |         |  
|Current liabilities:                                                                                              |  |                          |         |   |                             |   |         |  
|Current portion of long-term debt                                                                                 |  | $                        | 5,714   |   |                             | $ | 5,714   |  
|Current portion of capital lease obligations                                                                      |  |                          | 3,324   |   |                             |   | 3,257   |  
|Accounts payable                                                                                                  |  |                          | 40,332  |   |                             |   | 28,463  |  
|Accrued liabilities                                                                                               |  |                          | 12,553  |   |                             |   | 11,448  |  
|Billings in excess of costs and estimated earnings on uncompleted contracts                                       |  |                          | 15,303  |   |                             |   | 14,808  |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total current liabilities                                                                                         |  |                          | 77,226  |   |                             |   | 63,690  |  
|Note payable to financial institution                                                                             |  |                          | 77,454  |   |                             |   | 68,000  |  
|Long-term debt, less current portion                                                                              |  |                          | 15,000  |   |                             |   | 17,786  |  
|Capital lease obligations, less current portion                                                                   |  |                          | 14,847  |   |                             |   | 15,705  |  
|Deferred income taxes                                                                                             |  |                          | 15,022  |   |                             |   | 14,582  |  
|Pension and other long-term liabilities                                                                           |  |                          | 8,834   |   |                             |   | 8,828   |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total liabilities                                                                                                 |  |                          | 208,383 |   |                             |   | 188,591 |  
|Commitments and contingencies (Note 5)                                                                            |  |                          |         |   |                             |   |         |  
|Stockholders equity:                                                                                             |  |                          |         |   |                             |   |         |  
|Preferred stock, $.01 par value, 10,000,000 shares authorized, none issued or outstanding                         |  |                          |        |   |                             |   |        |  
|Common stock, $.01 par value, 15,000,000 shares authorized, 9,307,422 and 9,298,156 shares issued and outstanding |  |                          | 93      |   |                             |   | 93      |  
|Additional paid-in-capital                                                                                        |  |                          | 107,782 |   |                             |   | 107,578 |  
|Retained earnings                                                                                                 |  |                          | 123,409 |   |                             |   | 120,477 |  
|Accumulated other comprehensive loss                                                                              |  |                          | (1,793  | ) |                             |   | (1,856  | )
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total stockholders equity                                                                                        |  |                          | 229,491 |   |                             |   | 226,292 |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  
|Total liabilities and stockholders equity                                                                        |  | $                        | 437,874 |   |                             | $ | 414,883 |  
|                                                                                                                  |  |                          |         |   |                             |   |         |  

The accompanying notes are an integral part of these condensed consolidated financial statements.



3



---

##### Table of Contents

NORTHWEST PIPE COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands, except per share amounts)



|                                            |  |                              |         |  |                 |   |        |  
|------------------------------------------- |  | ---------------------------- | ------- |  | --------------- | - | ------ | -
|                                            |  | Three Months Ended March 31, |        
|                                            |  | 2011As Restated              |         |  | 2010As Restated |  
|Net sales                                   |  | $                            | 111,458 |  |                 | $ | 80,382 |  
|Cost of sales                               |  |                              | 96,690  |  |                 |   | 72,193 |  
|                                            |  |                              |         |  |                 |   |        |  
|Gross profit                                |  |                              | 14,768  |  |                 |   | 8,189  |  
|Selling, general and administrative expense |  |                              | 7,289   |  |                 |   | 6,911  |  
|                                            |  |                              |         |  |                 |   |        |  
|Operating income                            |  |                              | 7,479   |  |                 |   | 1,278  |  
|Other expense (income)                      |  |                              | 113     |  |                 |   | (655   | )
|Interest income                             |  |                              |        |  |                 |   | (214   | )
|Interest expense                            |  |                              | 2,618   |  |                 |   | 1,570  |  
|                                            |  |                              |         |  |                 |   |        |  
|Income before income taxes                  |  |                              | 4,748   |  |                 |   | 577    |  
|Provision for income taxes                  |  |                              | 1,816   |  |                 |   | 89     |  
|                                            |  |                              |         |  |                 |   |        |  
|Net income                                  |  | $                            | 2,932   |  |                 | $ | 488    |  
|                                            |  |                              |         |  |                 |   |        |  
|Basic earnings per share                    |  | $                            | 0.32    |  |                 | $ | 0.05   |  
|                                            |  |                              |         |  |                 |   |        |  
|Diluted earnings per share                  |  | $                            | 0.31    |  |                 | $ | 0.05   |  
|                                            |  |                              |         |  |                 |   |        |  
|Shares used in per share calculations:      |  |                              |         |  |                 |   |        |  
|Basic                                       |  |                              | 9,304   |  |                 |   | 9,249  |  
|                                            |  |                              |         |  |                 |   |        |  
|Diluted                                     |  |                              | 9,344   |  |                 |   | 9,342  |  
|                                            |  |                              |         |  |                 |   |        |  

The accompanying notes are an integral part of these condensed consolidated financial statements



4



---

##### Table of Contents

NORTHWEST PIPE COMPANY

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)



|                                                                                                    |  |                              |         |   |                 |   |         |  
|--------------------------------------------------------------------------------------------------- |  | ---------------------------- | ------- | - | --------------- | - | ------- | -
|                                                                                                    |  | Three months ended March 31, |        
|                                                                                                    |  | 2011As Restated              |         |   | 2010As Restated |  
|Cash Flows From Operating Activities:                                                               |  |                              |         |   |                 |   |         |  
|Net income                                                                                          |  | $                            | 2,932   |   |                 | $ | 488     |  
|Adjustments to reconcile net income to net cash used in operating activities:                       |  |                              |         |   |                 |   |         |  
|Depreciation and amortization                                                                       |  |                              | 3,191   |   |                 |   | 3,288   |  
|Amortization of intangible assets                                                                   |  |                              | 30      |   |                 |   | 63      |  
|Provision for doubtful accounts                                                                     |  |                              | (365    | ) |                 |   | (391    | )
|Equity in earnings of unconsolidated subsidiary, net of dividends received                          |  |                              | 113     |   |                 |   | (694    | )
|Amortization of debt issuance costs                                                                 |  |                              | 510     |   |                 |   | 225     |  
|Deferred income taxes                                                                               |  |                              | 1,331   |   |                 |   | (726    | )
|Loss on disposal of property and equipment                                                          |  |                              | 16      |   |                 |   | 7       |  
|Stock based compensation expense                                                                    |  |                              | 218     |   |                 |   | 493     |  
|Tax benefit from stock option plans                                                                 |  |                              |        |   |                 |   | (122    | )
|Unrealized loss on foreign currency forward contracts                                               |  |                              | 386     |   |                 |   | (51     | )
|Changes in operating assets and liabilities:                                                        |  |                              |         |   |                 |   |         |  
|Trade and other receivables, net                                                                    |  |                              | (4,599  | ) |                 |   | (11,415 | )
|Costs and estimated earnings in excess of billings on uncompleted contracts, net                    |  |                              | (8,411  | ) |                 |   | (8,280  | )
|Inventories                                                                                         |  |                              | (13,157 | ) |                 |   | (5,791  | )
|Refundable income taxes                                                                             |  |                              | 3,917   |   |                 |   | 995     |  
|Prepaid expenses and other assets                                                                   |  |                              | 193     |   |                 |   | 550     |  
|Accounts payable                                                                                    |  |                              | 10,553  |   |                 |   | 4,603   |  
|Accrued and other liabilities                                                                       |  |                              | 787     |   |                 |   | 1,179   |  
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Net cash used in operating activities                                                               |  |                              | (2,355  | ) |                 |   | (15,579 | )
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Cash Flows From Investing Activities:                                                               |  |                              |         |   |                 |   |         |  
|Additions to property and equipment                                                                 |  |                              | (3,555  | ) |                 |   | (6,067  | )
|Proceeds from the sale of property and equipment                                                    |  |                              | 71      |   |                 |   | 19      |  
|Other investing activities                                                                          |  |                              |        |   |                 |   | (252    | )
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Net cash used in investing activities                                                               |  |                              | (3,484  | ) |                 |   | (6,300  | )
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Cash Flows From Financing Activities:                                                               |  |                              |         |   |                 |   |         |  
|Proceeds from issuance of common stock                                                              |  |                              | 36      |   |                 |   |        |  
|Tax withholdings related to net share settlements of restricted stock awards and performance shares |  |                              | (50     | ) |                 |   | (83     | )
|Payments on long-term debt                                                                          |  |                              | (2,786  | ) |                 |   | (2,786  | )
|Borrowings under note payable to financial institution                                              |  |                              | 49,267  |   |                 |   | 56,714  |  
|Payments on note payable to financial institution                                                   |  |                              | (39,813 | ) |                 |   | (31,545 | )
|Borrowings from capital lease obligations                                                           |  |                              |        |   |                 |   | 1,561   |  
|Payments on capital lease obligations                                                               |  |                              | (789    | ) |                 |   | (607    | )
|Payments of debt amendment costs                                                                    |  |                              |        |   |                 |   | (1,388  | )
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Net cash provided by financing activities                                                           |  |                              | 5,865   |   |                 |   | 21,866  |  
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Change in cash and cash equivalents                                                                 |  |                              | 26      |   |                 |   | (13     | )
|Cash and cash equivalents, beginning of period                                                      |  |                              | 51      |   |                 |   | 31      |  
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Cash and cash equivalents, end of period                                                            |  | $                            | 77      |   |                 | $ | 18      |  
|                                                                                                    |  |                              |         |   |                 |   |         |  
|Non-cash investing activity:                                                                        |  |                              |         |   |                 |   |         |  
|Escrow account related to capital lease financing                                                   |  | $                            | 2,726   |   |                 | $ | 4,030   |  
|Accrued property and equipment purchases                                                            |  |                              | 2,284   |   |                 |   | 1,287   |  

The accompanying notes are an integral part of these condensed consolidated financial statements.



5



---

##### Table of Contents

NORTHWEST PIPE COMPANY

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)



|1. | Basis of Presentation
|-- | ---------------------

The accompanying
unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America. The Company is filing this March 2011 Form 10-Q/A concurrently with the filing of
its amended Quarterly Report on Form 10-Q/A for the quarter ended June 30, 2011, its Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, and with the Annual Report on Form 10-K for the year ended December 31, 2011
(the 2011 Form 10-K). The financial information as of December 31, 2010 is derived from the audited consolidated financial statements presented in the Northwest Pipe Company (the Company) 2011 Form 10-K. Certain
information or footnote disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted, pursuant to the rules and
regulations of the Securities and Exchange Commission. In the opinion of management, the accompanying condensed consolidated financial statements include all adjustments necessary (which are of a normal and recurring nature) for the fair statement
of the results of the interim periods presented. The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto together with managements discussion and analysis of
financial condition and results of operations contained in the Companys 2011 Form 10-K.

The Condensed Consolidated Financial Statements
include the accounts of Northwest Pipe Company and its subsidiaries in which the Company exercises control as of the financial statement date. Intercompany accounts and transactions have been eliminated.

Northwest Pipe Asia Pte. Ltd. (NWPA), in which the Company exercises significant influence but does not control, is accounted for under the
equity method of accounting. During the first three months of 2011, the Company recorded purchases of property and equipment from NWPA of $0.2 million, net of eliminations. At March 31, 2011, intercompany balances with NWPA included a
receivable of $16,000. See Note 12 of the Condensed Consolidated Financial Statements for discussion of subsequent events related to NWPA.

Operating results for the three months ended March 31, 2011 are not necessarily indicative of the results that may be expected for the entire fiscal
year ending December 31, 2011.



|2. | Inventories
|-- | -----------

Inventories are stated at
the lower of cost or market and consist of the following:



|                        |  |                |        |  |                  |   |        | 
|----------------------- |  | -------------- | ------ |  | ---------------- | - | ------ | 
|                        |  | March 31,2011  |        |  | December 31,2010 |  
|                        |  | (in thousands) |       
|Short-term inventories: |  |                |        |  |                  |   |        | 
|Raw materials           |  | $              | 70,662 |  |                  | $ | 58,610 | 
|Work-in-process         |  |                | 2,382  |  |                  |   | 2,521  | 
|Finished goods          |  |                | 18,258 |  |                  |   | 17,566 | 
|Supplies                |  |                | 2,299  |  |                  |   | 2,190  | 
|                        |  |                |        |  |                  |   |        | 
|                        |  |                | 93,601 |  |                  |   | 80,887 | 
|Long-term inventories:  |  |                |        |  |                  |   |        | 
|Finished goods          |  |                | 2,997  |  |                  |   | 2,554  | 
|                        |  |                |        |  |                  |   |        | 
|Total inventories       |  | $              | 96,598 |  |                  | $ | 83,441 | 
|                        |  |                |        |  |                  |   |        | 

Long-term inventories are recorded in other assets. The lower of cost or market adjustment was $4.0 million at
March 31, 2011 and $4.5 million at December 31, 2010.



|3. | Fair Value Measurements
|-- | -----------------------

The Company
records its financial assets and liabilities at fair value, which is defined as the price that would be received to sell an asset or paid to transfer a liability, in the principal or most advantageous market for the asset or liability, in an orderly
transaction between market participants at the measurement date.

The authoritative guidance establishes a fair value hierarchy which
prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. These levels are: Level 1 (inputs are quoted prices in active markets for identical assets or liabilities); Level 2 (inputs are other than quoted
prices that are observable, either directly or indirectly through corroboration with observable market data); and Level 3 (inputs are unobservable, with little or no market data that exists, such as internal financial forecasts). The Company is
required to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.



6



---

##### Table of Contents

The following table summarizes information regarding the Companys financial assets and financial
liabilities that are measured at fair value (in thousands):



|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|--------------------------------- |  | -------------------------- | ------ | - | ------- | - | ----- | ------- |  | - | ------- | - |  | - | - | 
|                                  |  | Balance atMarch 31,2011    |        |   | Level 1 |   |       | Level 2 |  |   | Level 3 |  
|Description                       |  |                            |        |   |         |   |       |         |  |   |         |  
|Financial Assets                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Escrow account                    |  | $                          | 2,726  |   |         | $ | 2,726 |         |  | $ |        |   |  | $ |  | 
|Deferred compensation plan assets |  |                            | 4,584  |   |         |   | 4,584 |         |  |   |        |   |  |   |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Total Assets                      |  | $                          | 7,310  |   |         | $ | 7,310 |         |  | $ |        |   |  | $ |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Financial Liabilities             |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Derivatives                       |  | $                          | (1,011 | ) |         | $ |      |         |  | $ | (1,011  | ) |  | $ |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|                                  |  |                            |        |  
|                                  |  | Balance atDecember 31,2010 |        |   | Level 1 |   |       | Level 2 |  |   | Level 3 |  
|Description                       |  |                            |        |   |         |   |       |         |  |   |         |  
|Financial Assets                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Escrow account                    |  | $                          | 2,726  |   |         | $ | 2,726 |         |  | $ |        |   |  | $ |  | 
|Deferred compensation plan assets |  |                            | 4,560  |   |         |   | 4,560 |         |  |   |        |   |  |   |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Total Assets                      |  | $                          | 7,286  |   |         | $ | 7,286 |         |  | $ |        |   |  | $ |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Financial Liabilities             |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 
|Derivatives                       |  | $                          | (622   | ) |         | $ |      |         |  | $ | (622    | ) |  | $ |  | 
|                                  |  |                            |        |   |         |   |       |         |  |   |         |   |  |   |   | 

The escrow account, consisting of a money market mutual fund, is valued using quoted market prices in active markets
classified as Level 1 within the fair value hierarchy. The deferred compensation plan assets consists of cash and several publicly traded stock and bond mutual funds, valued using quoted market prices in active markets classified as Level 1 within
the fair value hierarchy. The Companys derivatives consist of foreign currency cash flow hedges and are valued using various pricing models or discounted cash flow analyses that incorporate observable market parameters, such as interest rate
yield curves and currency rates, and are classified as Level 2 within the valuation hierarchy. Derivative valuations incorporate credit risk adjustments that are necessary to reflect the probability of default by the counterparty or the
Company.

The net carrying amounts of cash and cash equivalents, trade and other receivables, refundable income taxes, accounts payable,
accrued liabilities and note payable to financial institution approximate fair value due to the short-term nature of these instruments. Similarly, the Company believes the carrying value of its long-term debt also approximates fair value in that the
interest rates and scheduled maturities applicable of the outstanding borrowings approximate interest rates and terms available for the same or similar loans.



|4. | Derivative Instruments and Hedging Activities
|-- | ---------------------------------------------

The Company conducts business in various foreign countries, and, from time to time, settles transactions in foreign currencies. The Company has established a program that utilizes foreign currency forward
contracts to offset the risk associated with the effects of certain foreign currency exposures, typically arising from sales contracts denominated in Canadian currency. These derivative contracts are consistent with the Companys strategy for
financial risk management. The Company uses cash flow hedge accounting treatment for qualifying foreign currency forward contracts. The Company initially reports any gain or loss on the effective portion of a cash flow hedge as a component of other
comprehensive income and subsequently reclassifies any gain or loss to net sales when the hedged revenues are recorded. Instruments that do not qualify for cash flow hedge accounting treatment are re-measured at fair value on each balance sheet date
and resulting gains and losses are recognized in net income. As of March 31, 2011 and December 31, 2010, the total notional amount of the derivative contracts not designated as hedges was $1.0 million (CAD$1.0 million) and $1.3 million
(CAD$1.3 million), respectively. As of March 31, 2011 and December 31, 2010, the total notional amount of the derivative contracts designated as hedges was $16.3 million (CAD$15.8 million) and $15.1 million (CAD$15.0 million),
respectively.

For each derivative contract entered into in which the Company seeks to obtain cash flow hedge accounting treatment, the
Company formally documents all relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking the hedge transaction, the nature of the risk being hedged, how the hedging
instruments effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method of measuring ineffectiveness. This process includes linking all derivatives to specific firm
commitments or forecasted transactions and the derivatives are designated as cash flow hedges. The Company also formally assesses, both at the hedges inception and on an ongoing basis, whether the derivative contracts that are used in hedging
transactions are highly effective in offsetting changes in fair values or cash flows of hedged items. The effective portion of these hedged items is reflected in other comprehensive income (loss). If it is determined that a derivative contract is
not highly effective, or that it has ceased to be a highly effective hedge, the Company will be required to discontinue hedge accounting with respect to that derivative contract prospectively.



7



---

##### Table of Contents

Though most Canadian forward contracts have maturities not longer than 12 months at March 31, 2011, two
of the Companys contracts at that date with a total notional value of $3.6 million (CAD$3.4 million) have maturities greater than 12 months, with the greatest maturity being 18 months.

The balance sheet location and the fair values of derivative instruments are:





|                                                  |  |                |       |  |                  |   |     | 
|------------------------------------------------- |  | -------------- | ----- |  | ---------------- | - | --- | 
|                                                  |  | March 31,2011  |       |  | December 31,2010 |  
|Foreign Currency Forward Contracts                |  | (in thousands) |      
|Liabilities                                       |  |                |       |  |                  |   |     | 
|Derivatives designated as hedging instruments     |  |                |       |  |                  |   |     | 
|Accrued liabilities                               |  | $              | 320   |  |                  | $ | 317 | 
|Derivatives not designated as hedging instruments |  |                |       |  |                  |   |     | 
|Accrued liabilities                               |  |                | 691   |  |                  |   | 305 | 
|                                                  |  |                |       |  |                  |   |     | 
|Total liabilities                                 |  | $              | 1,011 |  |                  | $ | 622 | 
|                                                  |  |                |       |  |                  |   |     | 

The amounts of the gains and losses related to the Companys derivative contracts designated as hedging instruments
for the three months ended March 31, 2011 and March 31, 2010 are (in thousands):



|                                               |  |                                                                               |        |   |                                                                                                                                             |  |           |                                                                                                           |  |   |        |   |  |  |           |  |  |   |        |  
|---------------------------------------------- |  | ----------------------------------------------------------------------------- | ------ | - | ------------------------------------------------------------------------------------------------------------------------------------------- |  | --------- | --------------------------------------------------------------------------------------------------------- |  | - | ------ | - |  |  | --------- |  |  | - | ------ | -
|                                               |  | March 31, 2011                                                                |       
|                                               |  | Pretax LossRecognized in ComprehensiveIncome onEffective Portionof
Derivative |        |   | Pretax Loss Recognizedin Income on Effective Portionof 
Derivative as a Result ofReclassification fromAccumulated OtherComprehensive Income |  |           | Loss
onIneffective Portion ofDerivative andAmount Excluded fromEffectiveness Testing Recognized in Income | 
|Derivatives in Cash Flow Hedging Relationships |  |                                                                               | Amount |   |                                                                                                                                             |  | Location  |                                                                                                           |  |   | Amount |   |  |  | Location  |  |  |   | Amount |  
|                                               |  |                                                                               |        |   |                                                                                                                                             |  |           |                                                                                                           |  |   |        |   |  |  |           |  |  |   |        |  
|Foreign currency forward contracts             |  | $                                                                             | (253   | ) |                                                                                                                                             |  | Net sales |                                                                                                           |  | $ | (248   | ) |  |  | Net sales |  |  | $ | (25    | )
|                                               |  |                                                                               |        |   |                                                                                                                                             |  |           |                                                                                                           |  |   |        |   |  |  |           |  |  |   |        |  
|                                               | 
|                                               |  | March 31, 2010                                                                |       
|                                               |  | Pretax LossRecognized inComprehensiveIncome onEffective Portionof
Derivative  |        |   | Pretax Loss Recognizedin Income on Effective Portionof 
Derivative as a Result ofReclassification fromAccumulated OtherComprehensive Income |  |           | Gain
onIneffective Portion ofDerivative andAmount Excluded fromEffectiveness Testing Recognized in Income | 
|Derivatives in Cash Flow Hedging Relationships |  |                                                                               | Amount |   |                                                                                                                                             |  | Location  |                                                                                                           |  |   | Amount |   |  |  | Location  |  |  |   | Amount |  
|                                               |  |                                                                               |        |   |                                                                                                                                             |  |           |                                                                                                           |  |   |        |   |  |  |           |  |  |   |        |  
|Foreign currency forward contracts             |  | $                                                                             | (134   | ) |                                                                                                                                             |  | Net sales |                                                                                                           |  | $ | (104   | ) |  |  | Net sales |  |  | $ | 20     |  
|                                               |  |                                                                               |        |   |                                                                                                                                             |  |           |                                                                                                           |  |   |        |   |  |  |           |  |  |   |        |  

At March 31, 2011, the effective portion of our cash flow hedges was a pretax loss of $287,000, all of which is
expected to be reclassified from comprehensive income to net sales within the next 12 months.

For the three months ended March 31, 2011,
losses from our derivative contracts not designated as hedging instruments recognized in net sales were $0.2 million. For the three months ended March 31, 2010, losses from our derivative contracts not designated as hedging instruments
recognized in net sales were $0.4 million.



|5. | Commitments and Contingencies
|-- | -----------------------------

Securities Litigation. On November 20, 2009, a complaint against the Company, captioned Richard v. Northwest Pipe Co. et al., No.
C09-5724 RBL, was filed in the United States District Court for the Western District of Washington. The plaintiff is allegedly a purchaser of the Companys stock. In addition to the Company, Brian W. Dunham, the Companys former President
and Chief Executive Officer, and Stephanie J. Welty, the Companys former Chief Financial Officer, are named as defendants. The complaint alleges that defendants violated Section 10(b) of the Securities Exchange Act of 1934 by making false
or misleading statements between April 23, 2008 and November 11, 2009. Plaintiff seeks to represent a class of persons who purchased the Companys stock during the same period, and seeks damages for losses caused by the alleged
wrongdoing.



8



---

##### Table of Contents

A similar complaint, captioned Plumbers and Pipefitters Local Union No. 630 Pension-Annuity Trust
Fund v. Northwest Pipe Co. et al., No. C09-5791 RBL, was filed against the Company in the same court on December 22, 2009. In addition to the Company, Brian W. Dunham, Stephanie J. Welty and William R. Tagmyer, the Companys current
Chairman of the Board, are named as defendants in the Plumbers complaint. In the Plumbers complaint, as in the Richardcomplaint, the plaintiff is allegedly a purchaser of the Companys stock and asserts that defendants
violated Section 10(b) of the Securities Exchange Act of 1934 by making false or misleading statements between April 23, 2008 and November 11, 2009. Plaintiff seeks to represent a class of persons who purchased the Companys
stock during that period, and seeks damages for losses caused by the alleged wrongdoing.

The Richard action and the Plumbersaction were consolidated on February 25, 2010. Plumbers and Pipefitters Local No. 630 Pension-Annuity Trust Fund was appointed lead plaintiff in the consolidated action. Defendants and lead plaintiff subsequently agreed that defendants
did not need to respond immediately to either of the two outstanding complaints, and that a consolidated amended complaint would be filed within 45 days of us having completed the filing of our Quarterly Report on Form 10-Q for the quarter ended
September 30, 2009 and our 2009 Form 10-K with the SEC. A consolidated amended complaint was filed by the plaintiff on December 21, 2010, and our motion to dismiss was filed on February 25, 2011, as were similar motions filed by the
individual defendants. Under the scheduling order currently in effect, briefing on those motions will conclude by May 24, 2011. We intend to vigorously defend ourselves against these claims. This securities litigation is at an early stage and,
at this time, it is not possible to predict its outcome. Therefore, we have not accrued any charges related to this litigation.

On
March 3, 2010, the Company was served with a derivative complaint, captioned Ruggles v. Dunham et al., No. C10-5129 RBL, and filed in the United States District Court for the Western District of Washington. The plaintiff in this action
is allegedly a current shareholder of the Company. The Company is a nominal defendant in this litigation. Plaintiff seeks to assert, on the Companys behalf, claims against Brian W. Dunham, Stephanie J. Welty, William R. Tagmyer, Keith R.
Larson, Wayne B. Kingsley, Richard A. Roman, Michael C. Franson and Neil R. Thornton. The asserted basis of the claims is that defendants breached fiduciary duties to the Company by causing the Company to make improper statements between
April 23, 2008 and August 7, 2009. Plaintiff seeks to recover, on the Companys behalf, damages for losses caused by the alleged wrongdoing.

Neither the Company nor the defendants are required to respond to the current complaint. Pursuant to an agreement among the parties, the Court on February 15, 2011, entered an Order staying the
Rugglesaction until after the same Court has ruled on the motions to dismiss the securities class action described above. Any amended complaint in the Ruggles action would be due within 45 days after such a ruling. It should also be
noted that derivative claims by their nature do not seek to recover damages from us, but purport instead to seek to recover damages for the benefit of us. This litigation is at a very early stage and, at this time, it is not possible to predict its
outcome. Therefore, we have not accrued any charges related to this litigation.

SEC Investigation. On March 8, 2010, the
staff of the Enforcement Division of the SEC issued a formal order of investigation and a subpoena for the production of documents. The Company is cooperating with the SEC, but does not know when the inquiry and investigation will be resolved or
what, if any, actions the SEC may require as part of that resolution. Any action by the SEC or other governmental agency could result in civil or criminal sanctions against the Company and/or certain of its current or former officers, directors
and/or employees. The investigation is at an early stage and, at this time, it is not possible to predict its outcome. Therefore, the Company has not accrued any charges related to this investigation.

Environmental Litigation. On December 1, 2000, a section of the lower Willamette River known as the Portland Harbor was included on the
National Priorities List at the request of the U.S. Environmental Protection Agency (the EPA). While the Companys Portland, Oregon manufacturing facility does not border the Willamette River, an outfall from the facilitys
storm water system drains into a neighboring propertys privately owned slip. The Company and approximately 140 other parties have been notified by the EPA and the Oregon Department of Environmental Quality (the ODEQ) of potential
liability under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). As of March 2011, approximately 326 entities on and nearby the river have been asked to file information disclosure reports with the EPA.
By agreement with the EPA, the ODEQ is responsible with overseeing remedial investigation and source control activities for all upland sites to prevent future contamination to the river. A remedial investigation and feasibility study of the Portland
Harbor is currently being directed by a group of potentially responsible parties known as the Lower Willamette Group (the LWG). The Company made a payment of $175,000 to the LWG in June 2007 as part of an interim settlement, and is under
no obligation to make any further payment. A draft remedial investigation report was submitted to the EPA by the LWG in the fall of 2009; the final remediation investigation is expected to be complete in 2011. The feasibility study is underway, and
a draft is expected to be completed by the LWG in 2011.

In 2001, groundwater containing elevated organic compounds (VOCs) was
identified in one localized area of the Companys property furthest from the river. Assessment work in 2002 and 2003 to further characterize the groundwater is consistent with the initial conclusion that the source of the VOCs is located
off of Company-owned property. In February 2005, the Company entered into a Voluntary Agreement for Remedial Investigation and Source Control Measures (Agreement) with the ODEQ. The Company is one of 90 Upland Source Control Sites
working with the ODEQ on Source Control and is ranked a medium priority. The Company performed Remedial Investigation work required under the Agreement and submitted a draft Remedial Investigation/Source Control Evaluation Report on
December 30, 2005. The conclusions of the report indicated that the VOCs found in the groundwater do not present an unacceptable risk to human or ecological receptors in the Willamette River. The report also indicated there is no evidence at
this time showing a connection between detected VOCs in groundwater and Willamette River sediments. In 2009, the ODEQ requested the Company to revise its Remedial Investigation/Source Control Evaluation Report to include recent information available
related to nearby properties. ODEQ approved the Companys remediation plan in August 2010.



9



---

##### Table of Contents

Also, based on the remedial investigation and reporting required under the Portland, Oregon manufacturing
facilitys National Pollutant Discharge Elimination System permit for storm water, the Company and the ODEQ have identified small amounts of polynuclear aromatic compounds and polychlorinated biphenyls and have periodically identified trace
amounts of zinc in storm water. Storm water from the Portland, Oregon manufacturing facility site is discharged to a neighboring propertys privately owned slip, as is storm water from surrounding industrial properties. The slip was
historically used for shipbuilding and subsequently for ship breaking and metal recycling. Studies of the river sediments have revealed concentration of polynuclear aromatic compounds, polychlorinated biphenyls and zinc, which are common
constituents in urban storm water discharges. To minimize the zinc traces in its storm water, the Company painted a substantial part of the Portland facilitys roofs and made certain paving improvements at the Portland facility. In June 2009,
under the ODEQ Agreement, the Company submitted a Final Supplemental Work Plan to evaluate and assess soil and storm water, and further assess groundwater risk. The Company is working with the City of Portland and the ODEQ to facilitate further soil
and storm water source control measures. Expected expenditures in 2011 are approximately $1.9 million to address these issues.

Concurrent
with the activities of the EPA and the ODEQ, the Portland Harbor Natural Resources Trustee Council (Trustees) sent some or all of the same parties, including the Company, a notice of intent to perform a Natural Resource Damage Assessment
(NRDA) for the Portland Harbor Site to determine the nature and extent of natural resource damages under CERCLA section 107. The Trustees for the Portland Harbor Site consist of representatives from several Northwest Indian Tribes, three
federal agencies and one state agency. The Trustees act independently of the EPA and the ODEQ, but the Company expects their assessment will be coordinated with the remedial investigation and feasibility study work underway at the Portland Harbor
Site. In 2009, the Trustees completed phase one of their three-phase NRDA. Phase one of the NRDA consisted of environmental studies to fill gaps in the information available from the EPA, and development of a framework for evaluating,
quantifying and determining the extent of injuries to the natural resource and the resulting damages. Phase two of the NRDA began in 2010 and consists largely of implementing the framework developed in phase one.

The Trustees have encouraged potentially responsible parties to voluntarily participate in the funding of their injury assessments. In 2009, one of the
Tribal Trustees (the Yakima Nation) resigned and has requested funding from the same parties to support its own assessment. The Company has not assumed any payment obligation or liability related to either request. The extent of the Companys
obligation with respect to Portland Harbor matters is not known, and no further adjustment to the consolidated financial statements has been recorded as of March 31, 2011.

We operate our facilities under numerous governmental permits and licenses relating to air emissions, storm water run-off, and other environmental matters. Our operations are also governed by many other
laws and regulations, including those relating to workplace safety and worker health, principally the Occupational Safety and Health Act and regulations there under which, among other requirements, establish noise and dust standards. We believe we
are in material compliance with our permits and licenses and these laws and regulations, and we do not believe that future compliance with such laws and regulations will have a material adverse effect on our financial position, results of operations
or cash flows.

From time to time, the Company is involved in litigation relating to claims arising out of its operations in the normal course
of its business. The Company maintains insurance coverage against potential claims in amounts that are believed to be adequate. The Company believes that it is not presently a party to any other litigation, the outcome of which would have a material
adverse effect on its business, financial condition, results of operations or cash flows.

Guarantees.The Company has
entered into certain stand-by letters of credit that total $11.2 million at March 31, 2011. The stand-by letters of credit relate to workers compensation insurance and equipment financing.



10



---

##### Table of Contents

|6. | Segment Information
|-- | -------------------

The Companys
operations are organized in two reportable segments, the Water Transmission Group and the Tubular Products Group, which are based on the nature of the products and the manufacturing process. The Water Transmission Group manufactures large-diameter,
high-pressure steel pipeline systems for use in water infrastructure applications, primarily related to drinking water systems. These products are also used for hydroelectric power systems, wastewater systems and other applications. In addition, the
Water Transmission Group makes products for industrial plant piping systems and certain structural applications. The Tubular Products Group manufactures and markets smaller diameter, electric resistance welded steel pipe used in a wide range of
applications, including energy, construction, agricultural and traffic signpost systems. These two segments represent distinct business activities, which management evaluates based on segment gross profit and operating income. Transfers between
segments in the periods presented were not material.



|                         |  |                              |         |   |      |   |        |  
|------------------------ |  | ---------------------------- | ------- | - | ---- | - | ------ | -
|                         |  | Three months ended March 31, |        
|                         |  | 2011                         |         |   | 2010 |  
|                         |  | (in thousands)               |        
|Net sales:               |  |                              |         |   |      |   |        |  
|Water Transmission       |  | $                            | 58,645  |   |      | $ | 52,685 |  
|Tubular Products         |  |                              | 52,813  |   |      |   | 27,697 |  
|                         |  |                              |         |   |      |   |        |  
|Total                    |  | $                            | 111,458 |   |      | $ | 80,382 |  
|                         |  |                              |         |   |      |   |        |  
|Gross profit:            |  |                              |         |   |      |   |        |  
|Water Transmission       |  | $                            | 9,894   |   |      | $ | 6,174  |  
|Tubular Products         |  |                              | 4,874   |   |      |   | 2,015  |  
|                         |  |                              |         |   |      |   |        |  
|Total                    |  | $                            | 14,768  |   |      | $ | 8,189  |  
|                         |  |                              |         |   |      |   |        |  
|Operating income (loss): |  |                              |         |   |      |   |        |  
|Water Transmission       |  | $                            | 8,261   |   |      | $ | 3,873  |  
|Tubular Products         |  |                              | 3,849   |   |      |   | 1,445  |  
|Corporate                |  |                              | (4,631  | ) |      |   | (4,040 | )
|                         |  |                              |         |   |      |   |        |  
|Total                    |  | $                            | 7,479   |   |      | $ | 1,278  |  
|                         |  |                              |         |   |      |   |        |  



|7. | Share-based Compensation
|-- | ------------------------

The Company has
one active stock incentive plan for employees and directors, the 2007 Stock Incentive Plan, which provides for awards of stock options to purchase shares of common stock, stock appreciation rights, restricted and unrestricted shares of common stock,
restricted stock units and performance awards. In addition, the Company has two inactive stock option plans, the 1995 Stock Option Plan for Nonemployee Directors and the Amended 1995 Stock Incentive Plan, under which previously granted options
remain outstanding.

The Company recognizes compensation cost as service is rendered based on the fair value of the awards. The following
summarizes share-based compensation expense recorded:



|                                             |  |                              |     |  |      |   |     | 
|-------------------------------------------- |  | ---------------------------- | --- |  | ---- | - | --- | 
|                                             |  | Three months ended March 31, |    
|                                             |  | 2011                         |     |  | 2010 |  
|                                             |  | (in thousands)               |    
|Cost of sales                                |  | $                            | 5   |  |      | $ | 27  | 
|Selling, general and administrative expenses |  |                              | 213 |  |      |   | 466 | 
|                                             |  |                              |     |  |      |   |     | 
|Total                                        |  | $                            | 218 |  |      | $ | 493 | 
|                                             |  |                              |     |  |      |   |     | 

As of March 31, 2011, unrecognized compensation expense related to the unvested portion of the Companys
restricted stock units and performance awards was $321,000, which is expected to be recognized over a weighted average period of 1.2 years.



11



---

##### Table of Contents

Stock Option Awards

A summary of the status of the Companys stock options as of March 31, 2011 and changes during the three months then ended is presented below:



|                               |  |                    |         |   |                                       |   |       |                                         |  |  |                          |  |  |   |     | 
|------------------------------ |  | ------------------ | ------- | - | ------------------------------------- | - | ----- | --------------------------------------- |  |  | ------------------------ |  |  | - | --- | 
|                               |  | OptionsOutstanding |         |   | WeightedAverageExercisePrice perShare |   |       | WeightedAverageRemainingContractualLife |  |  | AggregateIntrinsic Value | 
|                               |  |                    |         |   |                                       |   |       |                                         |  |  | (In thousands)           | 
|Balance, January 1, 2011       |  |                    | 145,209 |   |                                       | $ | 17.64 |                                         |  |  |                          |  |  |   |     | 
|Options granted                |  |                    |        |   |                                       |   |      |                                         |  |  |                          |  |  |   |     | 
|Options exercised or exchanged |  |                    | (2,215  | ) |                                       |   | 15.97 |                                         |  |  |                          |  |  |   |     | 
|Options canceled               |  |                    |        |   |                                       |   |      |                                         |  |  |                          |  |  |   |     | 
|                               |  |                    |         |   |                                       |   |       |                                         |  |  |                          |  |  |   |     | 
|Balance, March 31, 2011        |  |                    | 142,994 |   |                                       |   | 17.67 |                                         |  |  | 2.48                     |  |  | $ | 875 | 
|                               |  |                    |         |   |                                       |   |       |                                         |  |  |                          |  |  |   |     | 
|Exercisable, March 31, 2011    |  |                    | 142,994 |   |                                       |   | 17.67 |                                         |  |  | 2.48                     |  |  | $ | 875 | 
|                               |  |                    |         |   |                                       |   |       |                                         |  |  |                          |  |  |   |     | 

The total intrinsic value, defined as the difference between the current market value and the grant price, of options
exercised or exchanged during the three months ended March 31, 2011 was $17,000.

Restricted Stock Units and Performance Awards

A summary of the status of the Companys restricted stock units and performance awards as of March 31, 2011 and changes
during the three months then ended is presented below:



|                                                                          |  |                                                     |         |   |                                      |   |       | 
|------------------------------------------------------------------------- |  | --------------------------------------------------- | ------- | - | ------------------------------------ | - | ----- | 
|                                                                          |  | Number ofRestricted StockUnits andPerformanceAwards |         |   | WeightedAverage GrantDate Fair Value |  
|Unvested restricted stock units and performance awards at January 1, 2011 |  |                                                     | 55,843  |   |                                      | $ | 37.00 | 
|Restricted stock units and performance awards granted                     |  |                                                     | 18,000  |   |                                      |   | 23.79 | 
|Restricted stock units and performance awards vested                      |  |                                                     | (14,980 | ) |                                      |   | 37.66 | 
|Restricted stock units and performance awards canceled                    |  |                                                     | (8,254  | ) |                                      |   | 37.97 | 
|                                                                          |  |                                                     |         |   |                                      |   |       | 
|Unvested restricted stock units and performance awards at March 31, 2011  |  |                                                     | 50,609  |   |                                      |   | 31.95 | 
|                                                                          |  |                                                     |         |   |                                      |   |       | 

Restricted stock units (RSUs) and performance stock awards (PSAs) are measured at market value on the date of
grant. RSUs are service-based awards and generally vest equally over a three-year period. PSAs are performance and service-based awards. PSAs are awarded at the end of a three-year performance period, if certain performance
objectives are met, and vest equally over a two-year period. The Company recognizes compensation expense related to the performance awards based on the probable outcome of the performance conditions.



|8. | Income Taxes
|-- | ------------

The Company files income
tax returns in the United States Federal jurisdiction, in a limited number of foreign jurisdictions, and in many state jurisdictions. With few exceptions, the Company is no longer subject to U.S. Federal, state or foreign income tax examinations for
years before 2007.

The Company had $125,000 of unrecognized tax benefits at March 31, 2011 and December 31, 2010. The Company does
not believe it is reasonably possible that the total amounts of unrecognized tax benefits will change significantly in the following twelve months; however, actual results could differ from those currently expected.

The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. The Company provided for income taxes at
estimated effective tax rates of 38.3% and 15.4% for the three month periods ended March 31, 2011 and March 31, 2010, respectively.



12



---

##### Table of Contents

|9. | Comprehensive Income
|-- | --------------------

Comprehensive
income is reconciled to net income and includes all changes in stockholders equity for the three months ended March 31, 2011 and 2010 except those resulting from investment by and distribution to stockholders as follows:



|                                                                       |  |                              |       |  |      |   |     |  
|---------------------------------------------------------------------- |  | ---------------------------- | ----- |  | ---- | - | --- | -
|                                                                       |  | Three Months Ended March 31, |      
|                                                                       |  | 2011                         |       |  | 2010 |  
|                                                                       |  | (In thousands)               |      
|Net income                                                             |  | $                            | 2,932 |  |      | $ | 488 |  
|Pension liability adjustment, net of tax                               |  |                              | 44    |  |      |   | 44  |  
|Unrealized gain (loss) on derivative financial instruments, net of tax |  |                              | 19    |  |      |   | (30 | )
|                                                                       |  |                              |       |  |      |   |     |  
|Total comprehensive income                                             |  | $                            | 2,995 |  |      | $ | 502 |  
|                                                                       |  |                              |       |  |      |   |     |  



|10. | Earnings per Share
|--- | ------------------

Earnings per basic
and diluted weighted average common share outstanding was calculated as follows for the three months ended March 31, 2011 and 2010:



|                                                                     |  |                              |           |  |      |   |           | 
|-------------------------------------------------------------------- |  | ---------------------------- | --------- |  | ---- | - | --------- | 
|                                                                     |  | Three Months Ended March 31, |          
|                                                                     |  | 2011                         |           |  | 2010 |  
|Net income (in thousands)                                            |  | $                            | 2,932     |  |      | $ | 488       | 
|                                                                     |  |                              |           |  |      |   |           | 
|Basic weighted-average common shares outstanding                     |  |                              | 9,304,481 |  |      |   | 9,249,240 | 
|Effect of potentially dilutive common shares(1)                      |  |                              | 39,339    |  |      |   | 92,772    | 
|                                                                     |  |                              |           |  |      |   |           | 
|Diluted weighted-average common shares outstanding                   |  |                              | 9,343,820 |  |      |   | 9,342,012 | 
|                                                                     |  |                              |           |  |      |   |           | 
|Earnings per common share:                                           |  |                              |           |  |      |   |           | 
|Earnings per basic common share                                      |  | $                            | 0.32      |  |      | $ | 0.05      | 
|Earnings per diluted common share                                    |  | $                            | 0.31      |  |      | $ | 0.05      | 
|Antidilutive shares not included in diluted common share calculation |  |                              | 45,600    |  |      |   | 13,117    | 



|(1) | Represents the effect of the assumed exercise of stock options and the vesting of restricted stock units and performance stock awards, based on the treasury stock
method.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|11. | Recent Accounting and Reporting Developments
|--- | --------------------------------------------

In December 2010, the FASB issued amendments that modify Step 1 of the goodwill impairment test for reporting units with zero or negative carrying amounts. For those reporting units, an entity is required
to perform Step 2 of the goodwill impairment test if it is more likely than not that a goodwill impairment exists. In determining whether it is more likely than not that a goodwill impairment exists, an entity should consider whether there are any
adverse qualitative factors indicating that an impairment may exist. The qualitative factors are consistent with the existing guidance, which requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs
or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. These amendments were effective January 1, 2011. The adoption of this guidance did not have a material impact on the
Companys consolidated financial position, results of operations or cash flows.



|12. | Subsequent Events
|--- | -----------------

Northwest Pipe Asia

On April 1, 2011, the Company sold its interest in NWPA for $0.8 million. Under the terms of the sales agreement, $0.3 million was
due at signing, $0.3 million is due on or before June 30, 2011 and $0.2 million is due on or before August 18, 2011.

Commitments
and Contingencies

On August 26, 2011 the Court denied all defendants motions to dismiss in the consolidated Richard action and the
Plumbers action, and the Company filed its answer to the consolidated amended complaint on October 24, 2011. The parties have conducted limited discovery and participated in an initial settlement mediation on January 30, 2012, with
additional sessions anticipated in the future. By agreement of the parties, no further discovery will take place until after the mediation process is exhausted. The Company intends to vigorously defend itself against these claims.



13



---

##### Table of Contents

On September 23, 2011, the Company was served with a derivative complaint, captioned Grivich v.
Dunham, et al., No. 11-2-03678-6 (Grivich), and filed in the Superior Court of Washington for Clark County. The plaintiff in this action is allegedly a current shareholder of the Company. The Company is a nominal defendant in
this litigation. Plaintiff seeks to assert, on the Companys behalf, claims against Brian W. Dunham, Stephanie J. Welty, William R. Tagmyer, Keith R. Larson, Wayne B. Kingsley, Richard A. Roman, Michael C. Franson and Neil R. Thornton. The
asserted basis of the claims is that defendants breached fiduciary duties to the Company between April 2, 2007 and the date of the Complaint. Plaintiff seeks to recover, on the Companys behalf, damages for losses caused by the alleged
wrongdoing.

On October 14, 2011, another derivative complaint, captioned Richard v. Dunham, et al., No. 11-2-04080-5
(Richard Deriv.), was filed in the Superior Court of Washington for Clark County. The plaintiff in this action is allegedly a current shareholder of the Company. The Company is a nominal defendant in this litigation. Plaintiff seeks to
assert, on the Companys behalf, claims against Brian W. Dunham, Stephanie J. Welty, William R. Tagmyer, Keith R. Larson, Wayne B. Kingsley, Richard A. Roman, Michael C. Franson and Neil R. Thornton. The asserted basis of the claims is that
defendants breached fiduciary duties to the Company between April 2, 2007 and the date of the Complaint. Plaintiff seeks to recover, on the Companys behalf, damages for losses caused by the alleged wrongdoing.

An amended complaint in the Ruggles action was filed on November 10, 2011, and the defendant responded to the complaint by filing a motion to
dismiss, which motion is still pending. The derivative parties participated in the initial settlement mediation described above and will participate in any follow up sessions. It should also be noted that derivative claims by their nature do not
seek to recover damages from the Company, but purport instead to seek to recover damages for the benefit of the Company. These cases are at a very early stage and, at this time, it is not possible to predict their outcome. Therefore, the Company has
not accrued any charges related to them.

Amended and Restated Credit Agreement

On March 29, 2012 the Company entered into an amendment to the Companys current Amended and Restated Credit Agreement which is recorded as
Note payable to financial institution on the balance sheet. A summary of the amendments is as follows:



| |  |  | Extended the expiration date to April 30, 2013;
| | - |  | -----------------------------------------------



| |  |  | Set aggregate commitments of the lenders at $115 million; and
| | - |  | -------------------------------------------------------------



| |  |  | Waived compliance with certain covenants and made certain changes in the definition, method of calculation and amounts of certain covenants.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



|13. | Restatement of Previously Issued Financial Statements
|--- | -----------------------------------------------------

Subsequent to the issuance of our unaudited condensed consolidated financial statements for the quarter ended June 30, 2011, the Company determined that there were errors included in the previously
issued condensed consolidated financial statements as described below. As a result, we have restated our condensed consolidated financial statements as of March 31, 2011 and December 31, 2010 and for the three months ended March 31,
2011 and 2010 to correct errors described below.

The restatement corrects the following errors:

Depreciation



| |  |  | The Companys historical method of systematically and rationally allocating equipment depreciation using the units of production depreciation
methodology (the Units of Production Method) requires an estimate of future tons of production over the remaining useful lives of equipment. The estimates of future tons of production over the remaining useful lives of equipment were not
properly re-evaluated subsequent to the initial assumptions utilized in the adoption, in 2006, of the Units of Production Method. To appropriately apply the Units of Production Method, the Company should have periodically re-evaluated the
assumptions underlying its application of the Units of Production Method and changed the assumptions underlying the accounting estimate beginning January 1, 2009. The effects of correcting this error are a net increase in depreciation expense
and a net decrease in loss on disposal, both of which are included in cost of sales, and a net increase in accumulated depreciation.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



14



---

##### Table of Contents

| |  |  | The Company also corrected its estimate of the remaining lives of non-operating equipment depreciated using the straight-line method of depreciation.
The effects of correcting this error are a net decrease in depreciation expense, which is primarily reflected in selling, general and administrative expense, and a net decrease in accumulated depreciation.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Historical salvage value estimates used to systematically and rationally allocate property and equipment depreciation were incorrect as they did not
sufficiently consider the estimated disposal value at the end of the property and equipments useful life. The effects of correcting this error are an increase in depreciation expense, which is reflected in cost of sales and selling, general
and administrative expense, and an increase in accumulated depreciation.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Other Errors



| |  |  | A contractual arrangement entered into with Lucid Energy LLC (Lucid Energy) during 2008 was incorrectly accounted for as notes receivable
within Other Assets. The contractual arrangement with Lucid Energy represented an interest in a variable interest entity which should have resulted in the entity being consolidated during 2009 and subsequently deconsolidated following the
retrospective adoption of the FASB authoritative guidance which changed the method of identifying the primary beneficiary. The adoption of this guidance did not have a material impact on the Companys consolidated financial statements. Upon
deconsolidation, the Companys investment in the entity should have been recorded as research and development expense within selling, general and administrative expense. The adjustments required to correct these errors have resulted in an
increase in selling, general, and administrative expense, a decrease in interest income, and a decrease in other assets.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Certain equipment leases historically accounted for as operating leases should have been recorded as capital leases. The correction of this error
increases depreciation expense and decreases rental expense, both of which are included in cost of sales, and increases interest expense in each period. The correction of this error also increased property and equipment, net, and capital lease
obligations.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Certain costs capitalized upon the relocation of machinery and equipment to our Bossier City facility in 2008 and 2009 should have been expensed. The
effects of correcting these errors were a reduction in machinery and equipment of $2.8 million as of March 31, 2011, and the related tax effects.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Certain previously identified immaterial errors were corrected as part of the restatement.
| | - |  | ------------------------------------------------------------------------------------------



15



---

##### Table of Contents

The impact on the Companys previously reported condensed consolidated statement of operations for the
three months ended March 31, 2011 and March 31, 2010 are shown in the following tables (in thousands, except per share data):



|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|----------------------------------- |  | --------------------- | ------- | - | ----------------------- | - | ---- | ----- |  | - | ----------- | - |  | - | ------- | 
|                                    |  |                       |         |   | Restatement Adjustments |   |      |       | 
|Three Months Ended March 31, 2011   |  | As PreviouslyReported |         |   | Depreciation            |   |      | Other |  |   | As Restated |  
|Net sales                           |  | $                     | 111,458 |   |                         | $ |     |       |  | $ |            |   |  | $ | 111,458 | 
|Cost of sales                       |  |                       | 95,874  |   |                         |   | 982  |       |  |   | (166        | ) |  |   | 96,690  | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Gross profit                        |  |                       | 15,584  |   |                         |   | (982 | )     |  |   | 166         |   |  |   | 14,768  | 
|Selling, general and administrative |  |                       | 7,315   |   |                         |   | (26  | )     |  |   |            |   |  |   | 7,289   | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Operating income                    |  |                       | 8,269   |   |                         |   | (956 | )     |  |   | 166         |   |  |   | 7,479   | 
|Other expense                       |  |                       | 113     |   |                         |   |     |       |  |   |            |   |  |   | 113     | 
|Interest income                     |  |                       | (33     | ) |                         |   |     |       |  |   | 33          |   |  |   |        | 
|Interest expense                    |  |                       | 2,374   |   |                         |   |     |       |  |   | 244         |   |  |   | 2,618   | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Income before income taxes          |  |                       | 5,815   |   |                         |   | (956 | )     |  |   | (111        | ) |  |   | 4,748   | 
|Provision for income taxes          |  |                       | 2,249   |   |                         |   | (388 | )     |  |   | (45         | ) |  |   | 1,816   | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Net income                          |  | $                     | 3,566   |   |                         | $ | (568 | )     |  | $ | (66         | ) |  | $ | 2,932   | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Basic earnings per share            |  | $                     | 0.38    |   |                         |   |      |       |  |   |             |   |  | $ | 0.32    | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 
|Diluted earnings per share          |  | $                     | 0.38    |   |                         |   |      |       |  |   |             |   |  | $ | 0.31    | 
|                                    |  |                       |         |   |                         |   |      |       |  |   |             |   |  |   |         | 



|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|----------------------------------- |  | --------------------- | ------ | - | ----------------------- | - | ------ | ----- |  | - | ----------- | - |  | - | ------ | -
|                                    |  |                       |        |   | Restatement Adjustments |   |        |       | 
|Three Months Ended March 31, 2010   |  | As PreviouslyReported |        |   | Depreciation            |   |        | Other |  |   | As Restated |  
|Net sales                           |  | $                     | 80,382 |   |                         | $ |       |       |  | $ |            |   |  | $ | 80,382 |  
|Cost of sales                       |  |                       | 71,285 |   |                         |   | 1,034  |       |  |   | (126        | ) |  |   | 72,193 |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Gross profit                        |  |                       | 9,097  |   |                         |   | (1,034 | )     |  |   | 126         |   |  |   | 8,189  |  
|Selling, general and administrative |  |                       | 6,645  |   |                         |   | (19    | )     |  |   | 285         |   |  |   | 6,911  |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Operating income                    |  |                       | 2,452  |   |                         |   | (1,015 | )     |  |   | (159        | ) |  |   | 1,278  |  
|Other income                        |  |                       | (655   | ) |                         |   |       |       |  |   |            |   |  |   | (655   | )
|Interest income                     |  |                       | (231   | ) |                         |   |       |       |  |   | 17          |   |  |   | (214   | )
|Interest expense                    |  |                       | 1,342  |   |                         |   |       |       |  |   | 228         |   |  |   | 1,570  |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Income before income taxes          |  |                       | 1,996  |   |                         |   | (1,015 | )     |  |   | (404        | ) |  |   | 577    |  
|Provision for income taxes          |  |                       | 940    |   |                         |   | (608   | )     |  |   | (243        | ) |  |   | 89     |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Net income                          |  | $                     | 1,056  |   |                         | $ | (407   | )     |  | $ | (161        | ) |  | $ | 488    |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Basic earnings per share            |  | $                     | 0.11   |   |                         |   |        |       |  |   |             |   |  | $ | 0.05   |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  
|Diluted earnings per share          |  | $                     | 0.11   |   |                         |   |        |       |  |   |             |   |  | $ | 0.05   |  
|                                    |  |                       |        |   |                         |   |        |       |  |   |             |   |  |   |        |  



16



---

##### Table of Contents

The following tables present the impact of the restatement adjustments on the Companys previously
reported consolidated balance sheet at March 31, 2011 and December 31, 2010 (in thousands):



|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|--------------------------------------------------------------------------- |  | --------------------- | ------- | - | ---------------------- | - | ------- | ----- |  | - | ----------- | - |  | - | ------- | -
|                                                                            |  |                       |         |   | RestatementAdjustments |   |         |       | 
|As of March 31, 2011                                                        |  | As PreviouslyReported |         |   | Depreciation           |   |         | Other |  |   | As Restated |  
|Assets                                                                      |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current assets:                                                             |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Cash and cash equivalents                                                   |  | $                     | 77      |   |                        | $ |        |       |  | $ |            |   |  | $ | 77      |  
|Trade and other receivables, net                                            |  |                       | 71,438  |   |                        |   |        |       |  |   |            |   |  |   | 71,438  |  
|Costs and estimated earnings in excess of billings on uncompleted contracts |  |                       | 54,439  |   |                        |   |        |       |  |   |            |   |  |   | 54,439  |  
|Inventories                                                                 |  |                       | 93,601  |   |                        |   |        |       |  |   |            |   |  |   | 93,601  |  
|Refundable income taxes                                                     |  |                       | 11,382  |   |                        |   |        |       |  |   | (200        | ) |  |   | 11,182  |  
|Deferred income taxes                                                       |  |                       | 5,402   |   |                        |   |        |       |  |   |            |   |  |   | 5,402   |  
|Prepaid expenses and other                                                  |  |                       | 1,994   |   |                        |   |        |       |  |   |            |   |  |   | 1,994   |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total current assets                                                        |  |                       | 238,333 |   |                        |   |        |       |  |   | (200        | ) |  |   | 238,133 |  
|Property and equipment, net                                                 |  |                       | 174,895 |   |                        |   | (25,187 | )     |  |   | 6,159       |   |  |   | 155,867 |  
|Goodwill                                                                    |  |                       | 21,451  |   |                        |   |        |       |  |   |            |   |  |   | 21,451  |  
|Other assets                                                                |  |                       | 25,110  |   |                        |   | (228    | )     |  |   | (2,459      | ) |  |   | 22,423  |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total assets                                                                |  | $                     | 459,789 |   |                        | $ | (25,415 | )     |  | $ | 3,500       |   |  | $ | 437,874 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Liabilities and Stockholders Equity                                        |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current liabilities:                                                        |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current portion of long-term debt                                           |  | $                     | 5,714   |   |                        | $ |        |       |  | $ |            |   |  | $ | 5,714   |  
|Current portion of capital lease obligations                                |  |                       | 1,102   |   |                        |   |        |       |  |   | 2,222       |   |  |   | 3,324   |  
|Accounts payable                                                            |  |                       | 40,332  |   |                        |   |        |       |  |   |            |   |  |   | 40,332  |  
|Accrued liabilities                                                         |  |                       | 12,553  |   |                        |   |        |       |  |   |            |   |  |   | 12,553  |  
|Billings in excess of costs and estimated earnings on uncompleted contracts |  |                       | 15,303  |   |                        |   |        |       |  |   |            |   |  |   | 15,303  |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total current liabilities                                                   |  |                       | 75,004  |   |                        |   |        |       |  |   | 2,222       |   |  |   | 77,226  |  
|Note payable to financial institution                                       |  |                       | 77,454  |   |                        |   |        |       |  |   |            |   |  |   | 77,454  |  
|Long-term debt, less current portion                                        |  |                       | 15,000  |   |                        |   |        |       |  |   |            |   |  |   | 15,000  |  
|Capital lease obligations, less current portion                             |  |                       | 7,450   |   |                        |   |        |       |  |   | 7,397       |   |  |   | 14,847  |  
|Deferred income taxes                                                       |  |                       | 26,568  |   |                        |   | (9,721  | )     |  |   | (1,825      | ) |  |   | 15,022  |  
|Pension and other long-term liabilities                                     |  |                       | 8,834   |   |                        |   |        |       |  |   |            |   |  |   | 8,834   |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total liabilities                                                           |  |                       | 210,310 |   |                        |   | (9,721  | )     |  |   | 7,794       |   |  |   | 208,383 |  
|Commitments and contingencies                                               |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Stockholders equity:                                                       |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Preferred stock                                                             |  |                       |        |   |                        |   |        |       |  |   |            |   |  |   |        |  
|Common stock                                                                |  |                       | 93      |   |                        |   |        |       |  |   |            |   |  |   | 93      |  
|Additional paid-in-capital                                                  |  |                       | 107,782 |   |                        |   |        |       |  |   |            |   |  |   | 107,782 |  
|Retained earnings                                                           |  |                       | 144,060 |   |                        |   | (15,694 | )     |  |   | (4,957      | ) |  |   | 123,409 |  
|Accumulated other comprehensive loss                                        |  |                       | (2,456  | ) |                        |   |        |       |  |   | 663         |   |  |   | (1,793  | )
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total stockholders equity                                                  |  |                       | 249,479 |   |                        |   | (15,694 | )     |  |   | (4,294      | ) |  |   | 229,491 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total liabilities and stockholders equity                                  |  | $                     | 459,789 |   |                        | $ | (25,415 | )     |  | $ | 3,500       |   |  | $ | 437,874 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  



17



---

##### Table of Contents

|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|--------------------------------------------------------------------------- |  | --------------------- | ------- | - | ---------------------- | - | ------- | ----- |  | - | ----------- | - |  | - | ------- | -
|                                                                            |  |                       |         |   | RestatementAdjustments |   |         |       | 
|As of December 31, 2010                                                     |  | As PreviouslyReported |         |   | Depreciation           |   |         | Other |  |   | As Restated |  
|Assets                                                                      |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current assets:                                                             |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Cash and cash equivalents                                                   |  | $                     | 51      |   |                        | $ |        |       |  | $ |            |   |  | $ | 51      |  
|Trade and other receivables, net                                            |  |                       | 66,474  |   |                        |   |        |       |  |   |            |   |  |   | 66,474  |  
|Costs and estimated earnings in excess of billings on uncompleted contracts |  |                       | 45,533  |   |                        |   |        |       |  |   |            |   |  |   | 45,533  |  
|Inventories                                                                 |  |                       | 80,887  |   |                        |   |        |       |  |   |            |   |  |   | 80,887  |  
|Refundable income taxes                                                     |  |                       | 15,299  |   |                        |   |        |       |  |   | (200        | ) |  |   | 15,099  |  
|Deferred income taxes                                                       |  |                       | 6,293   |   |                        |   |        |       |  |   |            |   |  |   | 6,293   |  
|Prepaid expenses and other                                                  |  |                       | 2,163   |   |                        |   |        |       |  |   |            |   |  |   | 2,163   |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total current assets                                                        |  |                       | 216,700 |   |                        |   |        |       |  |   | (200        | ) |  |   | 216,500 |  
|Property and equipment, net                                                 |  |                       | 171,766 |   |                        |   | (24,214 | )     |  |   | 6,722       |   |  |   | 154,274 |  
|Goodwill                                                                    |  |                       | 21,451  |   |                        |   |        |       |  |   |            |   |  |   | 21,451  |  
|Other assets                                                                |  |                       | 25,288  |   |                        |   | (243    | )     |  |   | (2,387      | ) |  |   | 22,658  |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total assets                                                                |  | $                     | 435,205 |   |                        | $ | (24,457 | )     |  | $ | 4,135       |   |  | $ | 414,883 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Liabilities and Stockholders Equity                                        |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current liabilities:                                                        |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Current portion of long-term debt                                           |  | $                     | 5,714   |   |                        | $ |        |       |  | $ |            |   |  | $ | 5,714   |  
|Current portion of capital lease obligations                                |  |                       | 1,087   |   |                        |   |        |       |  |   | 2,170       |   |  |   | 3,257   |  
|Accounts payable                                                            |  |                       | 28,463  |   |                        |   |        |       |  |   |            |   |  |   | 28,463  |  
|Accrued liabilities                                                         |  |                       | 11,448  |   |                        |   |        |       |  |   |            |   |  |   | 11,448  |  
|Billings in excess of costs and estimated earnings on uncompleted contracts |  |                       | 14,808  |   |                        |   |        |       |  |   |            |   |  |   | 14,808  |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total current liabilities                                                   |  |                       | 61,520  |   |                        |   |        |       |  |   | 2,170       |   |  |   | 63,690  |  
|Note payable to financial institution                                       |  |                       | 68,000  |   |                        |   |        |       |  |   |            |   |  |   | 68,000  |  
|Long-term debt, less current portion                                        |  |                       | 17,786  |   |                        |   |        |       |  |   |            |   |  |   | 17,786  |  
|Capital lease obligations, less current portion                             |  |                       | 7,731   |   |                        |   |        |       |  |   | 7,974       |   |  |   | 15,705  |  
|Deferred income taxes                                                       |  |                       | 25,694  |   |                        |   | (9,331  | )     |  |   | (1,781      | ) |  |   | 14,582  |  
|Pension and other long-term liabilities                                     |  |                       | 8,828   |   |                        |   |        |       |  |   |            |   |  |   | 8,828   |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total liabilities                                                           |  |                       | 189,559 |   |                        |   | (9,331  | )     |  |   | 8,363       |   |  |   | 188,591 |  
|Stockholders equity:                                                       |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Preferred stock                                                             |  |                       |        |   |                        |   |        |       |  |   |            |   |  |   |        |  
|Common stock                                                                |  |                       | 93      |   |                        |   |        |       |  |   |            |   |  |   | 93      |  
|Additional paid-in-capital                                                  |  |                       | 107,578 |   |                        |   |        |       |  |   |            |   |  |   | 107,578 |  
|Retained earnings                                                           |  |                       | 140,494 |   |                        |   | (15,126 | )     |  |   | (4,891      | ) |  |   | 120,477 |  
|Accumulated other comprehensive loss                                        |  |                       | (2,519  | ) |                        |   |        |       |  |   | 663         |   |  |   | (1,856  | )
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total stockholders equity                                                  |  |                       | 245,646 |   |                        |   | (15,126 | )     |  |   | (4,228      | ) |  |   | 226,292 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  
|Total liabilities and stockholders equity                                  |  | $                     | 435,205 |   |                        | $ | (24,457 | )     |  | $ | 4,135       |   |  | $ | 414,883 |  
|                                                                            |  |                       |         |   |                        |   |         |       |  |   |             |   |  |   |         |  



18



---

##### Table of Contents

The following tables present the impact of the restatement adjustments on the Companys previously
reported condensed consolidated statement of cash flows for the three months ended March 31, 2011 and March 31, 2010. Unrealized gain on foreign currency forward contracts in the amount of $0.4 million and $0.1 million, respectively, has
been reclassified within net cash used in operating activities to conform to the current period presentation. This reclassification is presented in the Restatement Adjustments column and had no impact on cash flows from operations, income from
operations, net income, or total assets.



|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|--------------------------------------------------------------------------------------------------- |  | --------------------------------- | ------- | - | ---------------------- | - | ----- | ----------- |  | - | ------- | -
|                                                                                                    |  | Three Months Ended March 31, 2011 |        
|                                                                                                    |  | As PreviouslyReported             |         |   | RestatementAdjustments |   |       | As Restated | 
|Cash flows from operating activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net income                                                                                          |  | $                                 | 3,566   |   |                        | $ | (634  | )           |  | $ | 2,932   |  
|Adjustments to reconcile net income to net cash used in operating activities:                       |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Depreciation and amortization                                                                       |  |                                   | 1,602   |   |                        |   | 1,589 |             |  |   | 3,191   |  
|Amortization of intangible assets                                                                   |  |                                   | 30      |   |                        |   |      |             |  |   | 30      |  
|Provision for doubtful accounts                                                                     |  |                                   | (365    | ) |                        |   |      |             |  |   | (365    | )
|Equity in earnings of unconsolidated subsidiary, net of dividends received                          |  |                                   | 113     |   |                        |   |      |             |  |   | 113     |  
|Amortization of debt issuance costs                                                                 |  |                                   | 510     |   |                        |   |      |             |  |   | 510     |  
|Deferred income taxes                                                                               |  |                                   | 1,765   |   |                        |   | (434  | )           |  |   | 1,331   |  
|Loss on disposal of property and equipment                                                          |  |                                   | 70      |   |                        |   | (54   | )           |  |   | 16      |  
|Stock-based compensation expense                                                                    |  |                                   | 218     |   |                        |   |      |             |  |   | 218     |  
|Loss on foreign currency forward contracts                                                          |  |                                   |        |   |                        |   | 386   |             |  |   | 386     |  
|Changes in operating assets and liabilities:                                                        |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Trade and other receivables, net                                                                    |  |                                   | (4,599  | ) |                        |   |      |             |  |   | (4,599  | )
|Costs and estimated earnings in excess of billings on uncompleted contracts, net                    |  |                                   | (8,411  | ) |                        |   |      |             |  |   | (8,411  | )
|Inventories                                                                                         |  |                                   | (13,157 | ) |                        |   |      |             |  |   | (13,157 | )
|Refundable income taxes                                                                             |  |                                   | 3,917   |   |                        |   |      |             |  |   | 3,917   |  
|Prepaid expenses and other assets                                                                   |  |                                   | 137     |   |                        |   | 56    |             |  |   | 193     |  
|Accounts payable                                                                                    |  |                                   | 10,553  |   |                        |   |      |             |  |   | 10,553  |  
|Accrued and other liabilities                                                                       |  |                                   | 1,173   |   |                        |   | (386  | )           |  |   | 787     |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash used in operating activities                                                               |  |                                   | (2,878  | ) |                        |   | 523   |             |  |   | (2,355  | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash flows from investing activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Additions to property and equipment                                                                 |  |                                   | (3,555  | ) |                        |   |      |             |  |   | (3,555  | )
|Proceeds from sale of property and equipment                                                        |  |                                   | 71      |   |                        |   |      |             |  |   | 71      |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash used in investing activities                                                               |  |                                   | (3,484  | ) |                        |   |      |             |  |   | (3,484  | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash flows from financing activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Proceeds from issuance of common stock                                                              |  |                                   | 36      |   |                        |   |      |             |  |   | 36      |  
|Tax withholdings related to net share settlements of restricted share awards and performance shares |  |                                   | (50     | ) |                        |   |      |             |  |   | (50     | )
|Payments on long-term debt                                                                          |  |                                   | (2,786  | ) |                        |   |      |             |  |   | (2,786  | )
|Borrowings under note payable to financial institutions                                             |  |                                   | 49,267  |   |                        |   |      |             |  |   | 49,267  |  
|Payments on note payable to financial institutions                                                  |  |                                   | (39,813 | ) |                        |   |      |             |  |   | (39,813 | )
|Payments on capital lease obligations                                                               |  |                                   | (266    | ) |                        |   | (523  | )           |  |   | (789    | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash provided by financing activities                                                           |  |                                   | 6,388   |   |                        |   | (523  | )           |  |   | 5,865   |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Change in cash and cash equivalents                                                                 |  |                                   | 26      |   |                        |   |      |             |  |   | 26      |  
|Cash and cash equivalents, beginning of period                                                      |  |                                   | 51      |   |                        |   |      |             |  |   | 51      |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash and cash equivalents, end of period                                                            |  | $                                 | 77      |   |                        | $ |      |             |  | $ | 77      |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Non-cash investing and financing activities:                                                        |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Escrow account related to capital lease financing                                                   |  | $                                 | 2,726   |   |                        | $ |      |             |  | $ | 2,726   |  
|Accrued property and equipment purchases                                                            |  |                                   | 2,284   |   |                        |   |      |             |  |   | 2,284   |  



19



---

##### Table of Contents

|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|--------------------------------------------------------------------------------------------------- |  | --------------------------------- | ------- | - | ---------------------- | - | ----- | ----------- |  | - | ------- | -
|                                                                                                    |  | Three Months Ended March 31, 2010 |        
|                                                                                                    |  | As PreviouslyReported             |         |   | RestatementAdjustments |   |       | As Restated | 
|Cash flows from operating activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net income                                                                                          |  | $                                 | 1,056   |   |                        | $ | (568  | )           |  | $ | 488     |  
|Adjustments to reconcile net income to net cash used in operating activities:                       |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Depreciation and amortization                                                                       |  |                                   | 1,762   |   |                        |   | 1,526 |             |  |   | 3,288   |  
|Amortization of intangible assets                                                                   |  |                                   | 30      |   |                        |   | 33    |             |  |   | 63      |  
|Provision for doubtful accounts                                                                     |  |                                   | (391    | ) |                        |   |      |             |  |   | (391    | )
|Equity in earnings of unconsolidated subsidiary, net of dividends received                          |  |                                   | (694    | ) |                        |   |      |             |  |   | (694    | )
|Amortization of debt issuance costs                                                                 |  |                                   | 225     |   |                        |   |      |             |  |   | 225     |  
|Deferred income taxes                                                                               |  |                                   | 125     |   |                        |   | (851  | )           |  |   | (726    | )
|Loss on disposal of property and equipment                                                          |  |                                   | 10      |   |                        |   | (3    | )           |  |   | 7       |  
|Stock-based compensation expense                                                                    |  |                                   | 493     |   |                        |   |      |             |  |   | 493     |  
|Tax benefit from stock option plans                                                                 |  |                                   | (122    | ) |                        |   |      |             |  |   | (122    | )
|Unrealized gain on foreign currency forward contracts                                               |  |                                   |        |   |                        |   | (51   | )           |  |   | (51     | )
|Changes in operating assets and liabilities:                                                        |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Trade and other receivables, net                                                                    |  |                                   | (11,415 | ) |                        |   |      |             |  |   | (11,415 | )
|Costs and estimated earnings in excess of billings on uncompleted contracts, net                    |  |                                   | (8,280  | ) |                        |   |      |             |  |   | (8,280  | )
|Inventories                                                                                         |  |                                   | (5,791  | ) |                        |   |      |             |  |   | (5,791  | )
|Refundable income taxes                                                                             |  |                                   | 995     |   |                        |   |      |             |  |   | 995     |  
|Prepaid expenses and other assets                                                                   |  |                                   | 464     |   |                        |   | 86    |             |  |   | 550     |  
|Accounts payable                                                                                    |  |                                   | 4,603   |   |                        |   |      |             |  |   | 4,603   |  
|Accrued and other liabilities                                                                       |  |                                   | 1,128   |   |                        |   | 51    |             |  |   | 1,179   |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash used in operating activities                                                               |  |                                   | (15,802 | ) |                        |   | 223   |             |  |   | (15,579 | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash flows from investing activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Additions to property and equipment                                                                 |  |                                   | (6,067  | ) |                        |   |      |             |  |   | (6,067  | )
|Proceeds from sale of property and equipment                                                        |  |                                   | 19      |   |                        |   |      |             |  |   | 19      |  
|Other investing activities                                                                          |  |                                   | (537    | ) |                        |   | 285   |             |  |   | (252    | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash used in investing activities                                                               |  |                                   | (6,585  | ) |                        |   | 285   |             |  |   | (6,300  | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash flows from financing activities:                                                               |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Tax withholdings related to net share settlements of restricted share awards and performance shares |  |                                   | (83     | ) |                        |   |      |             |  |   | (83     | )
|Payments on long-term debt                                                                          |  |                                   | (2,786  | ) |                        |   |      |             |  |   | (2,786  | )
|Borrowings under note payable to financial institutions                                             |  |                                   | 56,714  |   |                        |   |      |             |  |   | 56,714  |  
|Payments on note payable to financial institutions                                                  |  |                                   | (31,545 | ) |                        |   |      |             |  |   | (31,545 | )
|Borrowings from capital lease obligation                                                            |  |                                   | 1,561   |   |                        |   |      |             |  |   | 1,561   |  
|Payments on capital lease obligations                                                               |  |                                   | (99     | ) |                        |   | (508  | )           |  |   | (607    | )
|Payments of debt issuance costs                                                                     |  |                                   | (1,388  | ) |                        |   |      |             |  |   | (1,388  | )
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Net cash provided by financing activities                                                           |  |                                   | 22,374  |   |                        |   | (508  | )           |  |   | 21,866  |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Change in cash and cash equivalents                                                                 |  |                                   | (13     | ) |                        |   |      |             |  |   | (13     | )
|Cash and cash equivalents, beginning of period                                                      |  |                                   | 31      |   |                        |   |      |             |  |   | 31      |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Cash and cash equivalents, end of period                                                            |  | $                                 | 18      |   |                        | $ |      |             |  | $ | 18      |  
|                                                                                                    |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Non-cash investing and financing activities:                                                        |  |                                   |         |   |                        |   |       |             |  |   |         |  
|Escrow account related to capital lease financing                                                   |  | $                                 | 4,030   |   |                        | $ |      |             |  | $ | 4,030   |  
|Accrued property and equipment purchases                                                            |  |                                   | 1,287   |   |                        |   |      |             |  |   | 1,287   |  



20



---

##### Table of Contents

Item 2. Managements Discussion and Analysis of Financial Condition
and Results of Operations

Forward Looking Statements

This Managements Discussion and Analysis of Financial Condition and Results of Operations and other sections of this Report contain forward-looking statements within the meaning of the Securities
Litigation Reform Act of 1995 and Section 21E of the Exchange Act that are based on current expectations, estimates and projections about our business, managements beliefs, and assumptions made by management. Words such as
expects, anticipates, intends, plans, believes, seeks, estimates, forecasts, should, could, and variations of such words and
similar expressions are intended to identify such forward-looking statements. These statements are not guarantees of future performance and involve risks and uncertainties that are difficult to predict. Therefore, actual outcomes and results may
differ materially from what is expressed or forecasted in such forward-looking statements as a result of a variety of important factors. While it is impossible to identify all such factors, those that could cause actual results to differ materially
from those estimated by us include changes in demand and market prices for our products, product mix, bidding activity, the timing of customer orders and deliveries, production schedules, the price and availability of raw materials, excess or
shortage of production capacity, international trade policy and regulations and other risks discussed in our 2011 Form 10-K and from time to time in our other Securities and Exchange Commission filings and reports. Such forward-looking statements
speak only as of the date on which they are made and we do not undertake any obligation to update any forward-looking statement to reflect events or circumstances after the date of this Report. If we do update or correct one or more forward-looking
statements, investors and others should not conclude that we will make additional updates or corrections with respect thereto or with respect to other forward-looking statements.

Restatement of Previously Issued Financial Statements

Managements Discussion and
Analysis of Financial Condition and Results of Operations in both tabular and textual form as it relates to the three months ended March 31, 2011 and March 31, 2010 has been updated to reflect the effects of the restatement described in
Note 13 of the Condensed Consolidated Financial Statements in Part I  Item 1, Financial Statements.

Overview

We are a leading North American manufacturer of large-diameter, high-pressure steel pipeline systems for use in water infrastructure
applications, primarily related to drinking water systems, and we also manufacture other welded steel pipe products for use in a wide range of applications, including energy, construction, agriculture, industrial and traffic signpost systems. Our
pipeline systems are also used for hydroelectric power systems, wastewater systems and other applications, and we also make products for industrial plant piping systems and certain structural applications. These pipeline systems are produced by our
Water Transmission Group from seven manufacturing facilities located in Portland, Oregon; Denver, Colorado; Adelanto, California; Parkersburg, West Virginia; Saginaw, Texas; Pleasant Grove, Utah; and Monterrey, Mexico. Our Water Transmission Group
accounted for approximately 53% of net sales in the first three months of 2011.

Our water infrastructure products are generally sold to
installation contractors, who include our products in their bids to municipal agencies or privately-owned water companies for specific projects. Within the total pipeline, our products best fit the larger-diameter, higher-pressure applications. We
believe our sales are substantially driven by spending on new water infrastructure with additional spending on water infrastructure upgrades, replacements, and repairs. Pricing of our water infrastructure products is largely determined by the
competitive environment in each regional market, and the regional markets generally operate independently of each other. We operate our Water Transmission business with a long-term time horizon. Projects are often planned for many years in advance,
and are sometimes part of fifty-year build out plans. However, in the near-term, we expect strained municipal budgets will impact the Water Transmission Group.

Our Tubular Products Group manufactures other welded steel products in three facilities: Atchison, Kansas; Houston, Texas; and Bossier City, Louisiana. We produce a range of products used in several
different markets. We currently make pipe for a wide variety of uses, including energy, industrial, construction, agricultural, and traffic signpost systems, which are sold to distributors and used in many different applications. Our Tubular
Products Groups sales volume is typically driven by energy spending, non-residential construction spending, highway spending and general economic conditions. We believe the greatest potential for significant sales growth in our Tubular
Products Group is through our energy products. Our Tubular Products Group generated approximately 47% of net sales in the first three months of 2011.

Purchased steel represents a substantial portion of our cost of sales, and changes in our selling prices often correlate directly to changes in steel costs. This correlation is the greatest in our Tubular
Products Group. Tubular Products margins are highly sensitive to changes in steel costs, although the amounts of margins are also influenced by the current level of demand in the marketplace.



21



---

##### Table of Contents

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles
generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent
assets and liabilities. We evaluate our estimates on an on-going basis. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ from these
estimates under different assumptions or conditions. A description of our critical accounting policies and related judgments and estimates that affect the preparation of our consolidated financial statements is set forth in our Annual Report on Form
10-K for the year ended December 31, 2011, filed concurrently with this report.

Recent Accounting Pronouncements

See Note 11 of the Condensed Consolidated Financial Statements in Part IItem I, Financial Statements for a description of recent
accounting pronouncements, including the dates of adoption and estimated effects on financial position, results of operations and cash flows.

Results of Operations

The following
table sets forth, for the period indicated, certain financial information regarding costs and expenses expressed as a percentage of total net sales and net sales of our business segments.



|                                                   |  |                              |       |   |      |  |       |  
|-------------------------------------------------- |  | ---------------------------- | ----- | - | ---- |  | ----- | -
|                                                   |  | Three months ended March 31, |      
|                                                   |  | 2011                         |       |   | 2010 | 
|Net sales                                          |  |                              |       |   |      |  |       |  
|Water Transmission                                 |  |                              | 52.6  | % |      |  | 65.5  | %
|Tubular Products                                   |  |                              | 47.4  |   |      |  | 34.5  |  
|                                                   |  |                              |       |   |      |  |       |  
|Total net sales                                    |  |                              | 100.0 |   |      |  | 100.0 |  
|Cost of sales                                      |  |                              | 86.8  |   |      |  | 89.8  |  
|                                                   |  |                              |       |   |      |  |       |  
|Gross profit                                       |  |                              | 13.2  |   |      |  | 10.2  |  
|Selling, general and administrative expense        |  |                              | 6.5   |   |      |  | 8.6   |  
|                                                   |  |                              |       |   |      |  |       |  
|Operating income                                   |  |                              | 6.7   |   |      |  | 1.6   |  
|Other (income) expense                             |  |                              | 0.1   |   |      |  | (0.8  | )
|Interest income                                    |  |                              |      |   |      |  | (0.3  | )
|Interest expense                                   |  |                              | 2.3   |   |      |  | 2.0   |  
|                                                   |  |                              |       |   |      |  |       |  
|Income before income taxes                         |  |                              | 4.3   |   |      |  | 0.7   |  
|Provision for income taxes                         |  |                              | 1.7   |   |      |  | 0.1   |  
|                                                   |  |                              |       |   |      |  |       |  
|Net income                                         |  |                              | 2.6   | % |      |  | 0.6   | %
|                                                   |  |                              |       |   |      |  |       |  
|Gross profit as a percentage of segment net sales: |  |                              |       |   |      |  |       |  
|Water Transmission                                 |  |                              | 16.9  | % |      |  | 11.7  | %
|Tubular Products                                   |  |                              | 9.2   |   |      |  | 7.3   |  

Three Months Ended March 31, 2011 Compared to Three Months Ended March 31, 2010

Net sales. Net sales increased 38.7% to $111.5 million for the first quarter of 2011 compared to $80.4 million for the first quarter of
2010. One customer in the Tubular Products segment accounted for 10.9% of total net sales in the first quarter of 2011. No single customer accounted for 10% of net sales in the first quarter of 2010.

Water Transmission sales increased by 11.3% to $58.6 million in the first quarter of 2011 from $52.7 million in the first quarter of 2010. The increase
in sales in the first quarter of 2011 compared to the first quarter of 2010 was due to a 23% increase in selling prices per ton partially offset by a 10% decrease in volume. The increase in selling prices per ton in the first three months of 2011
was due to an increase in steel costs over 2010 and our mix of contracts produced during the quarter. Higher steel costs generally lead to higher contract values. Steel prices are discussed further in the gross margin analysis. The decrease in
volume resulted from continued weakness of municipal markets. Bidding activity, backlog and production levels may vary significantly from period to period affecting sales volumes.

Tubular Products sales increased 90.7% to $52.8 million in the first quarter of 2011 from $27.7 million in the first quarter of 2010. The sales increase in the first quarter of 2011 as compared to the
first quarter of 2010 was due to a 65% increase in tons sold and a 16% increase in selling price per ton. The most significant increase in demand was the result of increases in natural gas and oil drilling operations, with energy pipe representing
94% of the total Tubular Product volume increase in the first quarter of 2011 compared to the first quarter of 2010. In the first quarter of 2010, there were large amounts of imported energy pipe in the U.S. As import duties imposed by the U.S.
Government took effect in the second quarter of 2010, volumes of energy pipe imported in the U.S. declined, leading to the higher volumes and profits in the first quarter of 2011. With the increase in demand, we installed manufacturing equipment in
our Bossier City, Louisiana facility in 2010, increasing our capacity for energy pipe. Energy pipe volume increased 117% and energy pipe selling prices per ton increased 20% in the first quarter of 2011 compared to the first quarter of 2010.



22



---

##### Table of Contents

Gross profit. Gross profit increased 80.3% to $14.8 million (13.2% of total net sales) in the
first quarter of 2011 from $8.2 million (10.2% of total net sales) in the first quarter of 2010.

Water Transmission gross profit increased
$3.7 million, or 60.3%, to $9.9 million (16.9% of segment net sales) in the first quarter of 2011 from $6.2 million (11.7% of segment net sales) in the first quarter of 2010. Our gross margin was impacted by the higher sales discussed above and
higher materials cost per ton, including steel. Our Water Transmission materials cost per ton increased by 22% in the first quarter of 2011 compared to the first quarter of 2010 as a result of higher steel costs. Gross profit was positively impacted
as lower margin projects awarded in 2009 which flowed through the 2010 income statement had less impact in 2011.

Gross profit from Tubular
Products increased $2.9 million, or 141.9%, to $4.9 million (9.2% of segment net sales) in the first quarter of 2011 from $2.0 million (7.3% of segment net sales) in the first quarter of 2010. As noted above, demand for our Tubular Products
increased significantly, particularly for our energy products, which had sales revenue of $13.2 million in the first quarter of 2010 and increased 161% to $34.5 million in the first quarter of 2011. The significant increase in volume contributed to
the increase in gross profit in 2011, as the market conditions led to higher production which allowed us to recover more of our fixed costs than in the same period in 2010. The increased margins were partially offset by higher steel costs per ton of
10% in the first quarter of 2011 compared to the first quarter of 2010 and by our inventory lower of cost or market adjustment, which decreased by $678,000 in the first quarter of 2010 compared to no change in the first quarter of 2011.

Selling, general and administrative expenses. Selling, general and administrative expenses increased to $7.3 million (6.5% of total net
sales) in the first quarter of 2011 from $6.9 million (8.6% of total net sales) in the first quarter of 2010. In the first quarter of 2011 as compared to the first quarter of 2010, bonus expense of $0.4 million was recorded as a result of improved
financial outlook, Tubular Product sales commission expense increased $0.3 million with the increase in our Tubular Products sales volume, and severance costs increased $0.4 million related to the departure of our former Chief Financial Officer in
January, 2011. These were partially offset by reduced accounting investigation costs of $0.6 million.

Interest expense.
Interest expense was $2.6 million in the first quarter of 2011 and $1.6 million in the first quarter of 2010. Higher average borrowings and higher average interest rates increased interest expense in the first quarter of 2011 compared to the first
quarter of 2010.

Income Taxes. The tax provision was $1.8 million in the first quarter of 2011 (an effective tax rate of 38.3%)
while the tax provision for the first quarter of 2010 was $0.1 million (an effective tax rate of 15.4%). Our effective tax rate of 38.3% exceeds our federal statutory rate of 35% due primarily to state taxes and the relationship of permanent income
tax deductions and tax credits to estimated pre-tax income for the year 2011. When pre-tax earnings are minimal or move between loss and income positions, such as during 2010, the effective income tax rate can change significantly depending on the
relationship of permanent income tax deductions and tax credits to estimated pre-tax income or loss. Accordingly, the comparison of effective rates between periods is not meaningful.

Liquidity and Capital Resources

Sources and Uses of Cash

Our principal sources of liquidity generally include operating cash flow and our bank credit agreement. Our principal uses of liquidity generally include
capital expenditures, working capital and debt service. Information regarding our cash flows for the three months ended March 31, 2011 is presented in our condensed consolidated statements of cash flows contained in this Form 10-Q/A, and is
further discussed below.

As of March 31, 2011, our working capital (current assets minus current liabilities) was $160.9 million as
compared to $152.8 million as of December 31, 2010.

Net cash used in operating activities in the first three months of 2011 was $2.4
million. This was primarily the result of fluctuations in our working capital accounts, which result from timing differences between production, shipment and invoicing of our products, as well as changes in levels of production and costs of
materials. We typically have a relatively large investment in working capital, as we are generally obligated to pay for goods and services early in the life cycle of a Water Transmission segment project while cash is not received until much later in
the project. Our revenues in the Water Transmission segment are recognized on a percentage-of-completion method; therefore, there is little correlation between revenue and cash receipts and the elapsed time can be significant. As such, our payment
cycle is a significantly shorter interval than our collection cycle, although the effect of this difference in the cycles may vary from period to period.



23



---

##### Table of Contents

Net cash used in investing activities in the first three months of 2011 was $3.5 million, primarily for
capital expenditures for capacity expansion in our Tubular Products plants. Capital expenditures in 2011 are expected to be approximately $16 million to $18 million for standard capital replacement and recently announced strategic investment
projects. These include an expansion at our Atchison, Kansas facility that will increase its production capacity by more than 50%, improve productivity and enable the facility to produce product up to 0.375 inch wall. In addition, we are upgrading
our Houston, Texas mill to facilitate production of 2-3/8 and 2-7/8 inch tubing with physical properties suitable for heat treating.

Net cash
provided by financing activities in the first three months of 2011 was $5.9 million, which resulted primarily from net borrowings of $9.5 million under our Amended and Restated Credit Agreement (Credit Agreement), partially offset by
long-term debt payments of $2.8 million.

We anticipate that our existing cash and cash equivalents, cash flows expected to be generated by
operations, and amounts available under our credit agreements will be adequate to fund our working capital and capital requirements for at least the next twelve months. We also expect to continue to rely on cash generated from operations and other
sources of available funds to make required principal payments under our long term debt during 2011. To the extent necessary, we may also satisfy capital requirements through additional bank borrowings, senior notes, term notes, subordinated debt,
and capital and operating leases, if such resources are available on satisfactory terms. See the discussion below under Line of Credit and Long-Term Debt for a discussion of recent developments regarding compliance with the terms of our
line of credit and long-term debt agreements. We have from time to time evaluated and continue to evaluate opportunities for acquisitions and expansion. Any such transactions, if consummated, may use a portion of our working capital or necessitate
additional bank borrowings or other sources of funding.

Line of Credit and Long-Term Debt

We had the following significant components of debt at March 31, 2011: a $125.0 million Credit Agreement, under which $77.5 million was outstanding;
$6.4 million of Series A Term Note, $6.0 million of Series B Term Notes, $5.7 million of Series C Term Notes and $2.6 million of Series D Term Notes.

The Credit Agreement expires on April 30, 2012, and bears interest at rates related to LIBOR plus 2.50% to 4.50%, or the lending institutions prime rate, plus 1.50% to 3.50%. Borrowings under
the Credit Agreement are collateralized by substantially all of our personal property.

During 2010, we entered into several amendments to our
Credit Agreement and our Amended and Restated Note Purchase and Private Shelf Agreement (Note Purchase Agreement). The amendments, among other things, reduced the aggregate availability of our Credit Agreement, increased interest rates
charged on outstanding balances and waived compliance with certain covenants in the Agreements for the year ended December 31, 2009 and the quarters ended March 31, 2010 and June 30, 2010. Upon delivery to the lenders of the
Companys financial statements and Compliance Certificate for the period ended September 30, 2010, the availability under the Credit Agreement was increased to $117.5 million. Upon delivery of the March 31, 2011 Compliance
Certificate, amounts available under our Credit Agreement will increase to $125 million. In addition, the amendments changed the definitions, method of application and amounts of certain covenants. At March 31, 2011, we had $77.5 million
outstanding under the Credit Agreement bearing interest at a weighted average rate of 4.64%. At March 31, 2011, we had an additional net borrowing capacity under the credit facility of $26.5 million.

On March 29, 2012, the Company entered into an amendment to the Companys Credit Agreement which extended the expiration date to April 30,
2013, set aggregate commitments of the lenders at $115 million, waived compliance with certain covenants, and made certain changes in the definition, method of calculation and amounts of certain covenants.

The Series A Term Note in the principal amount of $6.4 million matures on February 25, 2014 and requires annual payments in the amount of $2.1
million plus interest of 10.75% paid quarterly on February 25, May 25, August 25 and November 25. The Series B Term Notes in the principal amount of $6.0 million mature on June 21, 2014 and require annual payments
in the amount of $1.5 million plus interest of 10.47% paid quarterly on March 21, June 21, September 21 and December 21. The Series C Term Notes in the principal amount of $5.7 million mature on October 26, 2014
and require annual payments of $1.4 million plus interest of 9.36% paid quarterly on January 26, April 26, July 26 and October 26. The Series D Term Notes in the principal amount of $2.6 million mature on
January 24, 2015 and require annual payments in the amount of $645,000 plus interest of 9.32% paid quarterly on January 24, April 24, July 24 and October 24. The Series A Term Note, the Series B Term Notes, the
Series C Term Notes, and the Series D Term Notes (together, the Term Notes) are collateralized by accounts receivable, inventory and certain equipment.

We had $18.2 million of capital leases outstanding at March 31, 2011, under which certain equipment used in the manufacturing process is leased. The average interest rate on capital leases is 7.86%.



24



---

##### Table of Contents

Our capital leases outstanding as of March 31, 2011 include an agreement entered into as of September
2009 to finance our Bossier City, Louisiana facility (the Financing Arrangement). As part of the Financing Arrangement, a $10 million escrow account was provided for the Company by a local government entity through a financial
institution and funds are released upon qualifying purchase requisitions. As we purchase equipment for the facility, we enter into a sale-leaseback transaction with the governmental entity as part of the Financing Arrangement. As of March 31,
2011, $2.7 million was held in the escrow account, which is included in other assets, as a result of proceeds from the Financing Arrangement. The Financing Arrangement requires us to meet certain loan covenants, measured at the end of each fiscal
quarter. These loan covenants follow the covenants required by our Credit Agreement.

The Credit Agreement, the Note Purchase Agreement and
certain of our leases place various restrictions on our ability to, among other things, incur certain additional indebtedness, create liens or other encumbrances on assets, and incur additional capital expenditures. The Credit Agreement, Note
Purchase Agreement, and certain of our leases require us to be in compliance with certain financial covenants. The results of our financial covenants as of March 31, 2011 are below.



| |  |  | The Consolidated Senior Leverage Ratio must not be greater than 6.25:1.0. Our ratio as of March 31, 2011 is 4.19:1.0.
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | The Consolidated Total Leverage Ratio must not be greater than 6.25:1.0. Our ratio as of March 31, 2011 is 4.19:1.0.
| | - |  | --------------------------------------------------------------------------------------------------------------------



| |  |  | The Consolidated Tangible Net Worth must be greater than $195.8 million. Our tangible net worth as of March 31, 2011 is 207.8 million.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The Asset Coverage Ratio cannot be less than 1.0:1.0. Our ratio as of March 31, 2011 is 1.60:1.0.
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | The Minimum Consolidated EBITDA cannot be less than $18.5 million. Our consolidated EBITDA as of March 31, 2011 is $25.2 million.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------



| |  |  | The Consolidated Rental and Operating Lease Expense to Consolidated Revenue Ratio must not be greater than 6.0%. Our ratio as of March 31, 2011 is
0.8%.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------

As of March 31, 2011, we are in compliance with all financial covenants. In accordance with the requirements,
the Consolidated Fixed Charge Coverage Ratio will next be calculated as of June 30, 2011.

Based on our business plan and forecasts of
operations, we believe we will remain in compliance with our amended covenants for the next 12 months.

Off Balance Sheet Arrangements

We do not have any off balance sheet arrangements that are reasonably likely to have a current or future material effect on our financial
position, results of operations or cash flows.

Item  3. Quantitative and Qualitative Disclosure About
Market Risk

For a discussion of the Companys market risk associated with foreign currencies and interest rates, see
Item 7A, Quantitative and Qualitative Disclosures about Market Risk in Part II of the Companys Annual Report on Form 10-K for the year ended December 31, 2011, filed concurrently with this report.

Item 4. Controls and Procedures

Restatement of Previously Issued Financial Statements

In this Quarterly Report on Form
10-Q/A for the quarterly period ended March 31, 2011 (the March 2011 Form 10-Q/A), Northwest Pipe Company (the Company) is restating to reflect the effects of material errors identified in the previously issued unaudited
condensed consolidated financial statements as of March 31, 2011 and December 31, 2010, and for the three months ended March 31, 2011 and March 31, 2010 as filed with the Securities and Exchange Commission (the SEC)
on May 10, 2011 (the Original Filing) in Part IItem 1, Financial Statements. In this filing, the Company is also updating Item 2, Managements Discussion and Analysis of Financial Condition and
Results of Operations to reflect the effects of the restatement as it relates to March 31, 2011 and December 31, 2010, and the three months ended March 31, 2011 and March 31, 2010.

For further detail on the financial statement impacts and the adjustments made as a result of the restatement, see Note 13 of the Condensed Consolidated
Financial Statements in Part IItem 1, Financial Statements.

Evaluation of Disclosure Controls and Procedures

Disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) are designed to provide reasonable
assurance that information required to be disclosed in reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and that such information is
accumulated and communicated to our management, including the Chief Executive Officer (CEO) and Chief Financial Officer (CFO), as appropriate to allow timely decisions regarding required disclosures.



25



---

##### Table of Contents

After discovering errors in our consolidated financial statements as of and for the years ended
December 31, 2010 and 2009, opening retained earnings at December 31, 2008, and the unaudited condensed consolidated financial statements for each of the quarters in the years then ended and the quarters ended March 31, 2011 and
June 30, 2011, that required restatement, our management, with the participation of our CEO and CFO have concluded that errors resulting in the restatement of our consolidated financial statements were the result of previously disclosed and
additionally identified material weaknesses in internal controls over financial reporting as described below. As a result of these material weaknesses in internal controls over financial reporting, our CEO and CFO have concluded that, as of
March 31, 2011, our disclosure controls and procedures were not effective.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended March 31, 2011 that materially
affected or are reasonably likely to materially affect our internal control over financial reporting. However, as described below under Plans for Remediation of Material Weaknesses, we are dedicating significant resources to support our
efforts to improve the control environment and to remedy the control weaknesses described herein.

Material Weaknesses in Internal Control
over Financial Reporting

In connection with managements previous assessment of our internal control over financial reporting as of
December 31, 2010, management has identified the following deficiencies that constituted individually, or in the aggregate, material weaknesses in our internal control over financial reporting as of December 31, 2010:



| |  |  | We did not maintain an effective control environment, which is necessary for effective internal control over financial reporting, as evidenced by:
(i) an insufficient number of personnel with an appropriate level of generally accepted accounting principles (GAAP) knowledge and experience or ongoing training in the application of GAAP commensurate with the Companys
financial reporting requirements, and (ii) insufficient number of personnel appropriately qualified to perform an appropriately detailed review of the accounting for nonroutine transactions, which resulted in prior periods in erroneous or
unsupported judgments regarding the proper application of GAAP. This control environment weakness also contributed to the additional material weaknesses described below.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We did not have effective controls to ensure regular validation of management assumptions used in certain of our accounting estimates.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We did not have effective controls over certain spreadsheets. Specifically, the Company did not have sufficient review procedures in place to ensure an
accurate preparation of spreadsheets used to support the preparation of financial information.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We did not maintain effective controls to ensure timely internal notification of business transactions and decisions requiring accounting entries.
Specifically, our sales and human resources teams and plant personnel did not communicate to our accounting staff all of the information necessary to make accurate accounting determinations for certain property and equipment and accrued liability
balances.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In connection with the restatement described in Note 13 of the Condensed Consolidated Financial Statements in
Part IItem 1, Financial Statements, we identified the following additional material weakness that existed as of December 31, 2010:



| |  |  | Control activities related to reviews to periodically assess accounting estimates of useful lives, units of production and salvage values used to
systematically and rationally allocate depreciation expense and the existence of our property and equipment were not appropriately designed or operating effectively.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The material weaknesses described above resulted in material misstatements in our annual and interim consolidated financial statements. Because of these material weaknesses, management concluded that we
did not maintain effective internal control over financial reporting as of March 31, 2011.

Plans for Remediation of Material
Weaknesses

Our Board, the Audit Committee and management are adding resources and developing and implementing new processes, procedures
and internal controls to remediate, among other things, the material weaknesses that existed in our internal control over financial reporting, and our disclosure controls and procedures, as of March 31, 2011.



26



---

##### Table of Contents

We have developed a remediation plan (the Remediation Plan) to address the material weaknesses
for each of the affected areas presented above. The Remediation Plan ensures that each area affected by a material control weakness is put through a comprehensive remediation process. The Remediation Plan entails a thorough analysis which
includes the following phases:



| |  |  | Define and assess each control deficiency: ensure a thorough understanding of the as is state, process owners, and procedural or
technological gaps causing the deficiency. This work is underway for all identified areas;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Design and evaluate a remediation action for each control deficiency for each affected area: validate or improve the related policy and procedures;
evaluate skills of the process owners with regard to the policy and adjust as required. The Remediation Plan will require an assessment of all control failures; we expect that many of the recent improvements will provide an appropriate starting
point for the specific action plans;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Implement specific remediation actions: train process owners, allow time for process adoption and adequate transaction volume for next steps;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Test and measure the design and effectiveness of the remediation actions; test and provide feedback on the design and operating effectiveness of the
controls, and;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Review and acceptance of completion of the remediation effort by management and the Audit Committee.
| | - |  | ----------------------------------------------------------------------------------------------------

Additionally, we are evaluating and enhancing our entity level controls as part of our Remediation Plan. The following are steps we have taken in this
process:



| |  |  | In March 2010, our Board of Directors appointed a new CEO;
| | - |  | ----------------------------------------------------------



| |  |  | In August 2010, we hired a Director of Compliance and Controls to direct our remediation efforts;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | In August 2010, our Board of Directors elected a new, independent member to the Board of Directors;
| | - |  | ---------------------------------------------------------------------------------------------------



| |  |  | In the third quarter of 2010, we implemented a new sub-certification process with our management group in order to demonstrate a clear commitment to
corporate integrity and compliance and a duty to report financial irregularities;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In the third quarter of 2010, we undertook an effort to enhance existing and adopt new, written policies and procedures; specifically, we have focused
on our cost-to-cost percentage-of-completion revenue recognition method to describe more clearly our guiding principles related to the accounting for our Water Transmission segment contracts;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In December of 2010, our employees acknowledged, by way of signature, compliance with and understanding of our Code of Conduct;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------



| |  |  | In January of 2011, our Board of Directors appointed a new CFO;
| | - |  | ---------------------------------------------------------------



| |  |  | In the first four months of 2011, the accounting and finance department was reorganized and additional personnel were hired for critical accounting
positions.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------

The Remediation Plan is being administered by our Director of Compliance and Controls and involves key leaders
from across the organization, including the CEO and CFO. Each specific area of action within the Remediation Plan has been assigned an owner who coordinates the resources required for timely completion of the remediation activities. The Director of
Compliance and Controls reports quarterly and as needed to the Audit Committee of our Board of Directors on the progress made toward completion of the Remediation Plan.

We believe the steps taken to date have improved the effectiveness of our internal control over financial reporting; however, we have not completed the corrective processes and procedures identified
herein. Accordingly, as we continue to monitor the effectiveness of our internal control over financial reporting in the areas affected by the material weaknesses described above, we will perform additional procedures prescribed by management
including the use of manual mitigating control procedures and employ any additional tools and resources deemed necessary to ensure that our financial statements are fairly stated in all material respects.

Part II  Other Information

Item 1. Legal Proceedings

Information required by this Item 1 is contained in Note 5 to the Condensed Consolidated Financial Statements, Part IItem 1, Financial Statements of this report, under the
caption Commitments and Contingencies. The text under such caption is incorporated by reference into this Item 1.



27



---

##### Table of Contents

Item 1A. Risk Factors

In addition to the other information set forth in this report, the factors discussed in Part IItem 1ARisk Factors in our
Annual Report on Form 10-K for the fiscal year ended December 31, 2011, filed concurrently with this report, could materially affect our business, financial condition or operating results. The risks described in our Annual Report on Form 10-K
are not the only risks facing us. There are additional risks and uncertainties not currently known to us or that we currently deem to be immaterial, that may also materially adversely affect our business, financial condition, or operating results.

Item 6. Exhibits

(a) The exhibits filed as part of this Report are listed below:



|               |  |                                                                                                                                                                                                                                                                                         
|-------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit
Number |  | Description                                                                                                                                                                                                                                                                             
|               | 
|31.1           |  | Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                                                                                                                                  
|               | 
|31.2           |  | Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                                                                                                                                  
|               | 
|32.1           |  | Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                                                                                                                                                  
|               | 
|32.2           |  | Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                                                                                                                                                  
|               | 
|10.1           |  | Separation Agreement and Release between Northwest Pipe Company and Stephanie J. Welty, dated as of January 20, 2011, incorporated by reference to the Companys Current
Report on Form 8-K, as filed with the Securities and Exchange Commission on January 24, 2011 (previously filed)



28



---

##### Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

Dated: April 27, 2012



NORTHWEST PIPE COMPANYBy:

/S/ RICHARD A. ROMANRichard A. RomanPresident and Chief Executive OfficerBy:

/s/ ROBIN GANTTRobin GanttVice President, Chief Financial Officer(Principal Financial Officer)




29