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Kentucky Transportation Cabinet District 5
October 14, 2005
MAC Construction selected a CON/SPAN® bridge system for a stream crossing to carry Fegenbush Lane over Fern Creek. The Kentucky Transportation Cabinet allowed contractors to select between a conventional single span bridge and a CON/SPAN bridge system on this project. The new structure replaced an older, deteriorating concrete box bridge.
The precast concrete arch units were placed on pedestal walls for an 18-foot clear rise. Use of the CON/SPAN® precast system also provided a clear span across the creek meeting the hydraulic requirements at the site.
“For this structure, we had to raise the existing roadway 10 to 12 feet,” said Mohamad Abdol, Design Engineer for the Kentucky Transportation Cabinet. “We looked at using a cast-in-place structure, but the overall cost of higher abutments was a huge difference. A CON/SPAN bridge and use of pedestal walls came out as a much more cost-effecitve bridge for this situation.”
By selecting the CON/SPAN bridge system, MAC Construction was able to save the Kentucky Transportation Cabinet more than 30% as compared to the lowest bid for the conventional single span bridge alternative. Installation time was also reduced; therefore minimizing the impact that construction would have on Fern Creek.
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