Williams & Works provided professional survey, design and construction engineering for the replacement of the Michigan Avenue Bridge over the Thornapple River in the City of Hastings, Michigan. As part of this project, Williams & Works completed a hydraulic/scour analysis, an MDEQ Joint Permit application and a geotechnical investigation with foundation recommendations for the replacement structure.
The approach work for this project consisted of reconstructing Michigan Avenue to revise the vertical alignment in order to improve drainage across the proposed structure and raising an existing sanitary sewer to meet minimum hydraulic clearances with the Thornapple River. In addition, the approach work included the replacement and upgrade of two traffic signals with new pedestrian crossing actuators, storm sewer improvements, pavement markings and restoration.
Part width construction was not feasible so traffic had to be maintained utilizing a detour. The City of Hastings only had one other crossing of the Thornapple River, M-43 (Broadway Street); therefore, any detour would require use of the MDOT trunkline. Williams & Works coordinated with MDOT on the use of M-43 and with the City of Hastings Fire Department to provide access and route for emergency vehicles during construction.
In addition to vehicular traffic Williams & Works paid close attention to recreational kayak and canoe traffic on the Thornapple River. Advanced signs were placed upstream and downstream of the crossing to inform river traffic of the bridge work ahead.