Lafayette Bascule Bridge Tender

ScopeThe Lafayette Bascule Bridge was constructed in 1938 and carries traffic on M-13M-84 Lafayette Avenue over the east channel of the Saginaw River in Bay City. The 456-foot structure is comprised of two approach spans and a 185-foot rolling lift span allowing for navigation of maritime traffic. More than 8 million vehicles travel across this structure every year with an average of 443 bridge openings per year during the navigational season.At nearly 80 years old the Lafayette Bascule Bridge is considered to be in poor condition according to the superstructure rating. A comprehensive feasibility study was performed in 2013 to evaluate superstructure repair versus replacing the structure. Replacement was recommended due to the scour criticality of the existing structure the age of the existing substructure and constructability issues requiring specialized and highly complex repairs.The proposed cross section of the new structure will consist of two 12-foot driving lanes. Pedestrians will use standard 5-foot-wide sidewalk on the bridges north side on the south side an 8-foot-wide sidewalk will be provided. A full detour will be required while the existing bridge is demolished and the new bridge is constructed. It is estimated that this detour will be in effect for 24 months.This project has been selected to use the construction managergeneral contractor CMGC delivery method. MDOT has selected a contractor with nationwide bascule bridge construction experience. This type of contract will also give designers more certainty in determining which construction methods will be most advantageous balancing economy with schedule concerns. Additionally there is opportunity to develop a shared-risk approach for work items that carry the most uncertainty. The total investment on this project is estimated to be 65 million.Shared-Use Pathway Safety Project - I-496 Waverly Road Lansing Road Ingham CountyThe construction of a 10-foot-wide shared-use pathway along Waverly Road is an excellent example of a complex interagency safety project that addresses safety challenges for several different user groups including pedestrians bicyclists and motor vehicle drivers. The unique location of this project requires coordination between Lansing Township Delta Township Ingham County Road Department Eaton County Road Commission and MDOT. The proposed cross section of the new structure will consist of two 12-foot driving lanes. Pedestrians will use standard 5-foot-wide sidewalk on the bridges north side on the south side an 8-foot-wide sidewalk will be provided. A full detour will be required while the existing bridge is demolished and the new bridge is constructed. It is estimated that this detour will be in effect for 24 months