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Top 20 Public Construction Projects of 1998


Top 20 Public Construction Projects of 1998
January 21, 1999

Project 6 - Tolt Pipeline No. 2, Phase II and Phase III, Western Segment

Journal staff

Tolt Pipeline
Aerial view of Tolt Pipeline project.
Photo by Helicam

Project description: The Tolt Pipeline is a project that will provide water for more citizens from the Snoqualmie River. The Western Segment involves furnishing and installing a steel pipeline varying in diameter from 60 to 81 inches, and the pipeline length is six miles.

The project includes construction of two line valve stations, air valve stations, blowoff stations, a cathodic protection system, crossings, landscaping, wetland restoration, several road crossings, numerous sections of local utility replacements and extensions, and a patrol/maintenance road with detention facilities.

The city considers giving the community affected by

Workman on the Tolt pipeline project
Workman on the Tolt pipeline project
the pipeline a pro-active role as important as the actual construction. Much of the pipeline will run through Redmond, the Puget Power right-of-way and through people's backyards. Representatives from the city held meetings with citizens, trail associations, biking groups, and the neighbors of the new pipeline to ensure the community that the construction would infringeas little as possible on the surrounding natural environment.

When the project has been completed, the areas under construction will be totally reconstructed, which will involve replanting the construction zone and restoring horse and bike trails.

Address: From the West Snoqualmie Valley Road to 160th Avenue Northeast and Northeast 104th Street, Redmond.
Original contract amount: $26,722,834.
Start of construction: July 1998.
Expected completion date: Fall 1999.
Contractor: Frank Coluccio Construction Co., 9600 Martin Luther King Jr. Way S., Seattle, WA 98118, (206)-722-5306.
Engineer: CH2M Hill, 777 108th Ave. NE, Bellevue, WA 98009-2050, (425)-453-5000.
Owner: City of Seattle Public Works.

Project participants:

  • Ashford Electric
  • Engineering Graphic Services
  • Gonzales Boring
  • Herrera Environmental Consultants
  • Horton Dennis & Associates
  • Infrastructure Consulting Corp.
  • Hot Mix Pavers
  • Magnolia Contractors
  • Northwest Erosion Control Services
  • Northwest Pipe Inc.
  • Pat Roome Landscape Design
  • Reed Logging and Construction
  • Shapiro & Associates
  • Stowe Construction
  • Terra Dynamics Inc.
  • V & J Inc.
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