Over the past 5 weeks, all tree clearing has been completed. The cofferdam for pier 2 of the new bridge has begun, and footing excavation should begin in about 2 weeks. The relocated Route 4/4A (west side) earth cut began last week and is expected to be ready in approximately 6 weeks. Once done, Liberty Utilities will begin setting new poles.
A cofferdam is a watertight enclosure from which water is pumped to expose the bottom of a body of water to permit construction (such as a pier)
Please direct questions about the Route 4/4A Bridge Project to:
Peter M. Kehoe
NHDOT Contract Administrator
Public Works Department > Engineering > Construction Projects > Route 4/4A Bridge > Updates >