The Missouri Department of Transportation (MoDOT)-St. Louis District chose Hanson to design a replacement bridge for the eastbound Interstate 64 bridge over Vandeventer Avenue and MetroLink and the structural rehabilitation of the adjacent mile-long westbound bridge and four other bridges in the corridor. The eastbound bridge has reached the end of its useful life and needs to be replaced, while the mile-long westbound structure and four other bridges in the corridor are in need of rehabilitation to extend their lives.
The project is located just outside downtown St. Louis and carries over 50,000 cars per day. Detour routes in the area will require use of the city street network and extensive signal retiming efforts to move cars around the work zone during the closure of I-64.
Hanson is providing conceptual through final design for the roadway and bridge, construction cost estimates and roadway engineering system (RES) submissions for the all the milestone submittals.
The project team’s tasks include:
- a conceptual study report
- a bridge alternatives analysis
- maintenance-of-traffic alternatives analysis
- a visual inspection and deck scanning of the westbound bridge
- a bridge rehabilitation checklist for the westbound bridge
- Levels A-D subsurface utility investigations
- preliminary roadway and bridge plans
- right-of-way (ROW) plans
- final bridge plans
- RES submissions
- utility coordination
- geotechnical investigations and recommendations
- public involvement support
- ADA improvements
- a survey of MoDOT’s ROW limits
- a topographic/utility survey through the project limits
- traffic phasing/maintenance-of-traffic modeling and analysis
- signal retiming
- safety analysis
- drainage design and analysis
