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STATE ROUTE 18 -- SE 312TH WAY TO SE 304TH STREET

Project description: Widen existing two-lane roadway to a four-lane divided highway and construct a new modified-diamond interchange. Work includes clearing and grubbing, grading, draining, constructing storm sewers and detention basins, constructing six prestressed concrete girder bridges and one steel plate girder bridge, constructing two walls, surfacing, paving with asphalt concrete, erosion control, roadside planting, wetland mitigation, stream restoration, installing beam guardrail, curb, cast-in-place concrete barrier, pavement marking, permanent signing, illumination systems, traffic signal system, fencing and other work.

Address: M.P. 7.91-9.53 of SR-18
Original contract amount: $25,737,305
Start of construction: March 5, 1996
Expected completion date: June 1998
Contractor: M.A. Segale Inc., P.O. Box 88050, Tukwila, WA 98138, 206-575-3200
Engineer: Amir Rasaie, WSDOT, 26157 Maple Valley/Black Diamond Road, Maple Valley, WA 98038, 206-872-2956
Owner: Washington State Department of Transportation
Project participants: David A. Mowat Co.; Apply-A-Line Inc.; Colvico Inc.; Concrete Paving Inc.; Gonzales Boring & Tunneling Inc.; Marshbank Construction; Davison Ranch Inc.; Petersen Brothers Inc.; SeaWest Construction Inc.; Security Barricade Inc.; Sharp Line Industries Inc.; Terra Dynamics Inc.; John-Wayne Construction Co.; Tacoma Pump & Drilling Inc.; Northwest Abatement Inc.; Rainier Steel; Kulchin-Condon & Assoc. Inc.; Northstar Steel Minnesota; Harris Rebar Inc.; Lone Star Northwest Inc.; D.S. Brown Inc.; and Concrete Technology Inc.

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