K. Singh & Associates, Inc. (KSingh) was selected by Racine County to design the reconstruction of the CTH D Bridge over the Fox River in the Town of Rochester.
The new bridge will replace the existing three-span structure with a two-span, 160-foot long, 38-foot wide concrete structure with extended parallel wings for retaining walls. KSingh is also leading the hydraulic study for the project that is surrounded by dams both up and down stream.
The Fox River presents several challenges to the project including continuous bank erosion and recreational activities. KSingh’s design incorporates measures to reduce erosion around the structure and nearby park while also providing recreational access.
One of the challenges was creating construction documents that allowed for demolition of the existing structure. This required close coordination with WisDOT Local Programs, area contractors, and the WDNR to ensure the Special Provisions were written in such a way that WDNR requirements were satisfied while also allowing for a constructable demolition of the existing structure.
KSingh is also working with the County and Town to prepare an aesthetically pleasing structure that still meets their funding capacity. As it is the main gateway in the Town of Rochester, a key issue on the project is to provide access to the businesses and emergency vehicles during construction.
The PS&E was completed in May of 2015. KSingh’s estimate was within 5% of the letting amount. The project is currently in construction.