IIW balanced an endangered species habitat and bridge size and placement when replacing a bridge that had been deemed functionally obsolete, narrow, and structurally deficient along Airport Road in Grant County, Wisconsin.
To improve the geometrics of the roadway approached, IIW designed the replacement bridge on a relocated alignment over a Branch of the Platte River. The new bridge features a 45-foot long, 24-foot wide reinforced concrete flat slab bridge.
The project required environmental coordination with the Wisconsin Department of Natural Resources to minimize impact on wetlands and Northern Cricket Frog habitat, an endangered species identified in the project area. As a result of the Northern Cricket Frog, IIW provided a series of documentation needed.
IIW brought a series of expertise to the project from beginning to end, including topographic survey, hydraulic analysis for sizing of the bridge structure, permitting, utility coordination, preparation of right-of-way plats; preliminary and final structure plan submissions, design study report, final design, and submittal of PS&E documents for a WisDOT bid.