I-90 construction: Why asphalt and not concrete - Spokane, North Idaho News & Weather KHQ.com

I-90 construction: Why asphalt and not concrete

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SPOKANE, Wash. - With the snow gone and temperatures rising, construction crews are out in full swing working on many road projects throughout the Inland Northwest. One the more anticipated projects in the area is the rut repair and ramp paving on I-90 from Division Street to the Hamilton Interchange. As part of this project, some of the existing concrete will be resurfaced with an asphalt overlay.

The practice of laying asphalt over concrete is common. Replacing concrete is cost prohibitive and laying asphalt over the existing concrete provides a cheaper solution.

The stretch of I-90 that is being repaved with asphalt is where the north/south Freeway will one day connect with the interstate. Authorties have chosen to repave with asphalt rather than replace the concrete because when the north/south freeway project nears completion that stretch of road will have to be replaced anyway.

As for when the north/south freeway will actually meet up with I-90, Al Gilson from the department of transprotation, said that answer is completely up to legislators who will have to find funding.

The asphalt from Havana to Hamilton will run taxpayers about $8 million versus nearly double that amount for concrete.

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