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PROJECT: Raw Water Facilities

LOCATION: 10350 Arrowhead Creek Lane, Wilsonville

COST:听$10,028,300

START DATE: June 2020

ANTICIPATED END DATE: July 2021

OWNER/DEVELOPER: Willamette Water Supply Program

ENGINEER: Black & Veatch Corp. (Jeff McMullen)

GENERAL CONTRACTOR: Kiewit Infrastructure West Co.

TUNNELING SUBCONTRACTOR:聽James W. Fowler Co.

SIGNIFICANCE OF PROJECT: The Willamette Water Supply System Commission’s goal is to provide a stable and seismically resilient water supply for ratepayers in Washington County. The cities of Hillsboro and Beaverton, along with the Tualatin Valley Water District, have come together to build more than 30 miles of large-diameter pipelines, expand the existing raw water facility, and modify an intake on the Willamette River near Wilsonville, a new raw water filtration facility near Sherwood and water reservoirs on Cooper Mountain.

James W. Fowler Co., serving as the trenchless subcontractor for general contractor Kiewit, is constructing a 270-foot pipe ram of 84-inch-diameter steel pipe underneath Arrowhead Creek, the 55-foot-diameter by 54-foot-deep secant pile launch shaft and 25-foot-diameter by 45-foot-deep secant pile reception shaft, 500 feet of 66-inch welded steel pipe, approximately 1,000 feet of underground utilities, tie-in to the existing pipeline, cleaning and pressure-testing of the pipelines, and other miscellaneous items to complete the pipeline installation. The pipe ram was completed below the water table in cobble- and boulder-laden ground using specialized equipment.

Construction and then operations were expected to create more than 4,000 jobs.

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