H&H provided design engineering services for the replacement of the Lafayette Bridge (M-13/M-84) over the East Channel of the Saginaw River. This project includes the complete replacement of the two-lane double-leaf rolling-lift bascule bridge and new tie-in intersections.
During Phase I, H&H performed a detailed inspection in 2012 and prepared a report that outlined the structural deficiencies and recommended that a detailed bridge replacement feasibility study be conducted. The feasibility study, completed in 2014, concluded that bridge replacement was preferred over bridge rehabilitation. During Phase II, H&H provided the preliminary and final design of the new 190-foot-long double-leaf rolling-lift bascule span per the AASHTO LRFD Bridge Design Manual and AASHTO Movable Bridge Manual. H&H was responsible for managing the entire project, including the coordination between the design of civil, structural, architectural, mechanical, and electrical components.
H&H also completed the design of the new abutments, new piers, including the structural base for an operator house on the east pier and a stair tower on the west pier, new fenders and protection cells, pier foundations, mechanical and electrical components, bridge utility and drainage components, bridge railing, and bridge lighting. The project will also provide improvements to the existing structure and approaches that include safety and operational features of the intersections at each end of the project limits and mitigation of environmental impacts that result from the new bridge and approaches.
The completed project will result in a safe, functional, maintainable, context-sensitive/aesthetic, and economical bridge that will serve the public for many decades.