Montgomery County Engineer Paul W. Gruner is announcing that the replacement of the Harshman Road Bridge over the Mad River, between Springfield Street and State Route 4 in Dayton, is expected to begin on November 16, 2015. Bids were opened on October 21. Eagle Bridge Company of Sidney, Ohio, is the low bidder at $7,328,661.12. The completion date is September 1, 2017.
Harshman Road will remain open to traffic during construction. The new bridge will be built one half at a time. The first operation by the contractor will be to install temporary pavement and to structurally prepare the existing bridge for maintaining traffic during construction. This operation will take two to three weeks. During this time, there will be one lane open for traffic in each direction on Harshman Road. After the initial two to three week period, there will be two lanes open for southbound traffic and one lane open for northbound traffic for the life of the project.
The new bridge, when finished, will carry two lanes of traffic in each direction plus a center left-turn lane to accommodate left turns into the northern entrance of Eastwood Metro Park. The new bridge will also carry a dedicated bicycle lane on the west side that will connect the two entrances of Eastwood Metro Park. The road work associated with this project will extend from Springfield Street to SR 4.
The Mad River Trail bikeway will be closed within the construction zone under the bridge, which will occur toward the end of November. The bikeway will have a posted detour directing cyclists and pedestrians onto the Eastwood Metro Park Drive, crossing Harshman Road at the traffic signal, and along the Well Field drive back to the bikeway.
Harshman Road is one of the busiest roads in Montgomery County. Drivers should expect delays and some congestion, particularly in the northbound direction where only one lane will be open to traffic. Drivers may want to find alternate routes during this time, if possible.
A large project like this is impossible for the County Engineer to build without grants and funding assistance. Federal Highway funds will pay for $5,607,063 (76.5%) of the project. The Ohio Public Works Commission will pay for $1,099,299 (15%), and the remaining $622,298 (8.5%) is from Montgomery County Engineer’s funds.
The existing bridge was built in 1958 and is at the end of its service life. Within the last several years, the Montgomery County Engineer’s Office has performed emergency repair work to keep the bridge in service. Rock protection was added at the piers to prevent further scour, the southbound deck was repaired and resurfaced to keep it open to traffic, and sheeting was added under the bridge to prevent deteriorated concrete from falling on the bikeway below.
The Montgomery County Engineer’s Office greatly appreciates the patience and cooperation of motorists during the construction period.