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Project Evaluation: US 97, Tonasket South Paving

Okanogan County
This project paved approximately 13 miles of US 97 south of Tonasket in Okanogan County.  The previous roadway surface, Bituminous Surface Treatment or "Chip Seal",  was converted to a stronger hot mix asphalt. The asphalt pavement improves the traffic-load carrying capacity of the highway, reduces future maintenance repair costs, and improves the ride.

In addtion, continuous centerline rumble strips were added throughout the entire project to reduce crossover head-on collisions.  Guardrail was also added in specific locations to reduce run-off-the-road accidents. The existing drainage system was retrofitted to improve highway runoff and reduce maintenance.

Design:  Contract Administration: Schedule:  Cost: Engineer’s Estimate: $3,758,610   Contractor's Bid: $3,488,938   Anticipated final payment to contractor: $3,210,893

Construction Summary
We constructed the project according to the original design with only minor changes during construction.  These were changes that would not have been possible to determine during the design phase.

Our working relationship with the contractor was good. Problems were addressed in a timely manner, which minimized impacts to the schedule and cost. Work began on June 6th and was complete on September 29^th.  The project was completed on-time and within budget.

The project's traffic control plan and the work zone safety plans were successful.  There were no personnel injuries reported during construction.

Contractor
Basin Asphalt Co.

P.O. Box 1628

Wenatchee, WA 98807

WSDOT Contact
Kevin Waligorski

Acting Project Engineer

PO Box 98

Wenatchee, WA  98807

(509) 667-2860

Visit the US 97 Tonasket South Web page for more information, photos and maps.

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