Archive for Tuesday, November 25, 2008

Johnson County, De Soto to repave 83rd Street next summer

November 25, 2008

Last Thursday, the De Soto City Council approved an agreement with Johnson County to repave 83rd Street from the Kill Creek Road intersection east to the city limits.

The agreement will make the project part of the county’s 2009 County Assisted Road System list, which shares the county’s fuel taxes with its cities. Under the agreement, the county will pay $417,000 of the project’s $819,000 cost.

The city last received CARS money for the 2004 repaving of Lexington Avenue.

City engineer Mike Brungardt said it was more than a decade since the four-mile stretch of road was last paved but didn’t know the exact date.

The summer project will first grind away the current 2-inches of asphalt on the road and replace it with a layer of new paving, Brungardt said. Although it will depend on next summer’s asphalt cost, enough money was put in the project to put down a 3-inch asphalt cap, he said.

“We hope to go back with three,” he said. “At today’s prices, we can do three.”

The asphalt sits atop a concrete road base, which has joints every 40 to 40 feet, Brungardt said. In addition, there are joints running the length of the road about 2 foot from its edge from when it was widened.

Inevitably, those cracks in the underlying concrete will reappear in the new surface, Brungardt said. The general rule is it takes a year for the cracks to appear on the surface for every inch of asphalt paving placed above the concrete, he said.

There have been a number of methods developed to prevent the the problem, but Brungardt said they weren’t effective.

The city will need to be prepared to seal the cracks when they appear to prevent deterioration, Brungardt said.

It is known some of the concrete will have to be replaced, and there could be other sections of bad concrete found when the existing asphalt cap is removed, Brungardt said.

The work will also include drainage improvements along the street, both to the shoulder and to curbs, Brungardt said.

The city engineer said project would be different in most the city undertakes in that it will require traffic control. One lane of the busy street would have to be kept open during construction, and that made him hesitant to estimate how long the work could tak

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