Elkhart County Highway
Maintenance  
Engineering

 

  Scope :

 

The project will involve the replacement of the northbound (eastern most) Johnson Street bridge structure in the City of Elkhart.  This structure was built in 1918 and was widened in 1954.  The design shall include, but is not limited to:  bridge size and type analysis, survey, geotechnical analysis and foundation design, drainage design and erosion control plans, maintenance of traffic plans, all required state and federal permits including coordination with and approval of American Electric Power regarding their adjacent dam structure, and preparation of contract plans and specifications. 

 

Currently there are two structures present at the bridge site.  The northbound structure, constructed in 1918 and the southbound structure constructed in 1992.  The new structure will be constructed to the west of the structure constructed in 1992. The new structure would be designed to carry the southbound traffic while the 1992 structure would be converted to carry the northbound traffic.  The new southbound structure would have a typical section matching the existing southbound structure. 

 

In order to accommodate this proposed structure configuration, the existing alignment of Johnson Street will need to be shifted to the west approximately 50 feet.  The alignment shift would be accomplished by extending the tangent sections in the north and south approaches toward the structure and placing horizontal curves at each end of the structure. 

 

The project is to be completed in five phases, starting in 2008, with completion in 2010.