Exhibit 99.1

EARNINGS RELEASE July 25, 2007

NORTHWEST PIPE REPORTS RECORD QUARTERLY SALES

Portland, Oregon, July 25, 2007. Northwest Pipe Company (NASDAQ: NWPX) today reported the highest quarterly sales in its history. Sales for the second quarter of 2007 were $101.9 million compared to $77.9 million in the second quarter of 2006. Net income for the second quarter of 2007 was $5.7 million, or $0.61 per diluted share, compared to $7.3 million, or $1.03 per diluted share, in the second quarter of 2006, which included a $7.7 million pretax, non-recurring gain on the sale of the Riverside property. Excluding the sale of the Riverside property, results were stronger in the second quarter of 2007 than in the second quarter of 2006.

Water Transmission

Sales in the Water Transmission Group for the second quarter of 2007 were $69.5 million compared to $51.3 million for the second quarter of 2006. Gross profit for the second quarter of 2007 was $15.1 million, or 21.7% of sales, compared to $9.8 million, or 19.1% of sales in the second quarter of 2006.

“The Water Transmission Group sales in the second quarter of this year were consistent with our expectations. Margins also improved, showing the benefits of higher plant utilization for the quarter,” said Dunham.

Tubular Products

The Tubular Products Group’s sales were $28.9 million in the second quarter of 2007 compared to $22.6 million for the second quarter of 2006. Gross profit was $3.6 million, or 12.5% of sales for the second quarter of 2007, compared to $2.7 million, or 11.7% of sales for the second quarter of 2006. This is the highest quarterly sales and gross profit for this Group since 2004.

Fabricated Products

Sales in the Fabricated Products Group were $3.5 million in the second quarter of 2007 compared to $3.9 million for the same period in 2006. Gross profit was $113,000, or 3.2% of sales in the second quarter of 2007, compared to $334,000, or 8.5% of sales for the second quarter of 2006.

Acquisition of Continental Pipe Manufacturing

The Company completed the purchase of Continental Pipe Manufacturing Company’s Pleasant Grove, Utah manufacturing plant at the beginning of July 2007. “This facility’s additional capacity will help support the Water Transmission Group’s growth in the

coming years,” said Dunham. “This facility did not have much backlog when we acquired it, so we expect a slow start. However, by the beginning of 2008, we should start seeing the benefits of this acquisition.”

Outlook

The Company reported a strong backlog of $192.2 million as of June 30, 2007. “We continue to expect the total 2007 market to exceed the 2006 market with strong bookings and sales in the second half of 2007. Due to timing issues, we expect third quarter revenues to be down somewhat from this quarter, with a stronger fourth quarter. We continue to project record results for this Group,” said Dunham.

“The Tubular Products Group should continue at approximately its current level in the third quarter and decrease in the fourth quarter, as a result of normal seasonality. We are on track to reach our near-term sales goal of $100 million in 2007,” stated Dunham. “In addition, with the improvement in gross profit as a percent of sales, we have the opportunity to record our strongest year in this Group since 2004.”

The Fabricated Products Group is expected to continue at its current level in sales and profitability through the rest of this year. “As we have stated before, the long-term opportunity in this Group is in supporting our water transmission business,” noted Dunham. “We will continue to increase production of pipe fittings at this facility in the months ahead and we have transitioned management responsibility for this Group to John Peterson, who heads up our Saginaw, Texas Division of the Water Transmission Group.”

About Northwest Pipe Company

Northwest Pipe Company manufactures welded steel pipe and other products in three business groups. Its Water Transmission Group is a leading supplier of large diameter, high-pressure steel pipe products that are used primarily for water infrastructure in North America. Its Tubular Products Group manufactures smaller diameter steel pipe for a wide range of construction, agricultural, energy, industrial and mechanical applications. Its Fabricated Products Group manufactures propane tanks and other fabricated products. The Company is headquartered in Portland, Oregon and has ten manufacturing facilities across the United States and Mexico.

Forward Looking Statements

Statements in this press release by Brian Dunham and statements in the “Outlook” section of this press release are “forward-looking” statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as expects, anticipates, intends, plans, believes, sees, estimates and variations of such words and similar expressions are intended to identify such forward-looking statements. Such statements reflect management’s current views and estimates of future economic and market circumstances, industry conditions, Company performance and financial results. Actual results could vary materially from the description contained herein due to many factors, including project delays, changes in bidding activity, market demand, operating efficiencies, availability and price of raw materials, availability and market acceptance of new products, product pricing, competitive environment, and other risks described from time to time in the Company’s reports to the Securities and Exchange

Commission. The forward-looking statements we make today speak only as of today and we do not undertake any obligation to update any such statements to reflect events or circumstances occurring after today.

CONTACT:	Brian Dunham
	Chief Executive Officer
	503-946-1200

NORTHWEST PIPE COMPANY

STATEMENTS OF OPERATIONS

(Dollar and share amounts in thousands, except per share amounts)

	Three Months Ended June 30					Six Months Ended June 30
	2007		2006			2007		2006
Net Sales:
Water Transmission	$	69,477	$	51,343		$	134,057	$	107,290
Tubular Products		28,918		22,593			51,901		41,493
Fabricated Products		3,502		3,920			6,675		7,891
Net Sales		101,897		77,856			192,633		156,674
Cost of Sales:
Water Transmission		54,426		41,527			105,270		87,301
Tubular Products		25,290		19,939			45,963		36,931
Fabricated Products		3,389		3,586			6,504		7,174
Total Cost of Sales		83,105		65,052			157,737		131,406
Gross Profit:
Water Transmission		15,051		9,816			28,787		19,989
Tubular Products		3,628		2,654			5,938		4,562
Fabricated Products		113		334			171		717
Gross Profit		18,792		12,804			34,896		25,268
Selling, General and Administrative		7,973		6,894			15,275		13,310
Gain on Sale of Asset		—		(7,674	)		—		(7,674	)
Operating Income		10,819		13,584			19,621		19,632
Interest Expense		1,833		1,729			3,437		3,487
Income Before Income Taxes		8,986		11,855			16,184		16,145
Provision for Income Taxes		3,324		4,532			5,988		6,184
Net Income	$	5,662	$	7,323		$	10,196	$	9,961
Basic Earnings per Share	$	0.63	$	1.07		$	1.14	$	1.45
Diluted Earnings per Share	$	0.61	$	1.03		$	1.11	$	1.40
Shares Used in Per Share Calculation:
Basic		8,940		6,854			8,932		6,848
Diluted		9,221		7,131			9,217		7,128

NORTHWEST PIPE COMPANY

SELECTED BALANCE SHEET AND OTHER DATA

(Dollar amounts in thousands)

	June 30, 2007			December 31, 2006
Assets:
Cash and Cash Equivalents	$	250		$	4,259
Trade and Other Receivables, Net		65,657			68,425
Cost and Estimated Earnings in Excess of Billings on Uncompleted Contracts		79,821			74,353
Inventories		63,638			79,300
Other Current Assets		9,876			11,177
Total Current Assets		219,242			237,514
Property and Equipment, Net		168,456			160,776
Other Assets		26,755			26,161
Total Assets	$	414,453		$	424,451
Liabilities:
Current Maturities of Long-Term Debt	$	4,402		$	9,663
Accounts Payable		29,717			50,865
Accrued Liabilities		13,740			10,243
Total Current Liabilities		47,859			70,771
Long-Term Note Payable to Financial Institution		49,001			43,000
Other Long-Term Debt, Less Current Maturities		40,710			47,915
Other Liabilities		33,879			31,939
Total Liabilities		171,449			193,625
Stockholders’ Equity		243,004			230,826
Total Liabilities and Stockholders’ Equity	$	414,453		$	424,451
Other Data:
Working Capital	$	171,383		$	166,743
Capital Expenditures		8,832			58,428
Depreciation and Amortization		2,518			3,782
Debt as a Percent of Capitalization		26.9	%		29.5	%