Top Projects of 2002 -- Seattle DJC.COM

#7. Cedar River Water
Treatment Plant

Project cost: $109 million
($40 million construction cost)

Buildings that are part of the Cedar River Water Treatment Plant are designed “green” to minimize environmental impact.
Rendering courtesy of CH2M Hill

Project address:
16207 S.E. Old Petrovitsky Road, Renton

Start of construction: May 28, 2002

Expected completion date:
June 2004

Owner:
Seattle Public Utilities

Type of contract:
Design-build-operate

Description The Cedar River Water Treatment Plant serves 70 percent of the Seattle metro area’s drinking water which now is only treated with chlorine, corrosion control chemicals and fluoride. The addition of ozonization and ultraviolet technology to the facility’s original capacity of 180 million gallons a day will make it the largest UV water treatment facility in the world.

The total cost to design-build-operate the facility for 25 years is $109 million. M.A. Mortenson Co. is a major partner in the construction phase of the project, with an $11 million structures package. The project includes a new intake structure and pump station, ozone injection and contact facilities, a UV disinfection facility, and two pre-stressed concrete clearwells to store up to 20 million gallons of potable water.

The site is environmentally sensitive and is interlaced with wetlands. Mortenson and CH2M Hill are working with the city of Seattle to design green/sustainable buildings that will minimize impact on the environment.

PROJECT PARTICIPANTS

Contractor:
CH2M Hill Constructors, 777 108th Ave. N.E., Suite 800, Bellevue, WA 98004-5118, (425) 453-5000

Designer/engineer:
CH2M Hill Constructors

Other Participants

M.A. Mortenson Co. (structures)

University Mechanical (mechanical)

Plateau Electrical (electrical)

Skaar Construction (concrete clearwell tanks)

General Construction (intake raw water pump station)

TSI (instrumentation and controls)