Maplewood Ave Bridge

This project is the replacement of the Maplewood Avenue Bridge at the North Mill Pond. Previous planning for this project as an out-year has been expedited due to the critical need for replacement identified in the Bridge Master Plan. The City is working to obtain the 80% NHDOT State Bridge Aid Program funds. If the funds are not available, general obligation bonding will be needed to complete this project. Improvements will include new sea walls, replacement of the existing water main and gravity sewer.

This project is currently in design and is identified in the FY 22 Capital Improvements Plan for funding in FY22.  The current anticipated schedule would be complete design in the fall of 2021 with construction to start the spring of 2022 to replace and repair the existing structure including new sidewalks. This is not a "Complete Streets" plan.

This project is being completed as part of the City’s Bridge Capital Improvement Program. Evaluation was included in the 2018 Citywide Bridge Evaluation. This assessment determined that a rehabilitation of the arch with an adhered lining system would allow the City to extend the lifespan of the bridge without the cost of a full replacement. The work will include resurfacing of the roadway, resetting the curb and reconstruction of the sidewalks, but will not address the sea walls or utilities.

Extending the timeframe for full replacement has improved the City’s chance of obtaining the 80% NHDOT State Bridge Aid Program funds for this work. When the bridge is replaced, work will include the sea walls and reconstruction of the water, sewer, and aerial utilities.

The Department of Public Works directed geotechnical investigations of the Maplewood Avenue Bridge over the North Mill Pond in July and August 2020. This work included the following:

  • Geophysical Survey using metal detectors, ground-penetrating radar, and precision locating equipment to identify underground utility infrastructure and other obstructions below the Maplewood Ave. Bridge over North Mill Pond bridge. 
  • Test borings using truck-mounted vacuum-excavation and drilling equipment to collect samples of the soil and bedrock below the bridge at six locations.

 

Project Manager: Dave Desfosses, Construction Project Manager 766-1411

Start Date: Construction: 

Estimated Time of Completion: 

Estimated Cost: 

Funding Source: 

Designer/Contractor: