The Kane County Division of Transportation hired Cotter to provide construction engineering services for the Big Timber Road over Tyler Creek bridge reconstruction and creek relocation project. The project included relocating Tyler and Pingree Creeks, widening the narrow, two-lane roadway, and constructing a 96-foot-long bridge over the new channel.
In the relocated creek, meandering turns and deep pools were constructed to promote wildlife, increase bank stability, and reduce erosion. Native wetland and prairie plants were also restored. Demolished bridge and pavement material was reused on site or recycled as clean fill.
The project required a comprehensive understanding of bridge construction and environmental compliance for waterway work. Cotter brought the regulatory agencies and contractors together prior to construction to establish environmental standards. This early collaborative effort aided the successful delivery of the project and resulted in an engineering award from the American Society of Civil Engineers, Illinois Section.
Cotter performed regular erosion and sedimentation control inspections to maintain compliance with NPDES requirements. Cotter continues to oversee post-construction maintenance and monitoring activities as required by the US Army Corps of Engineers to ensure that native plant and animal life is successfully reestablished.