The New Hampshire Department of Transportation plans bridge repairs to the Route 4 bridge over the Blackwater River in Andover that will require the full closure of the bridge to traffic for approximately six weeks beginning on Monday, October 13. The bridge is located about a third of a mile from the Andover/Salisbury town line.

While the bridge is closed, a signed detour will be in place using Plains Roads and Route 11.  Oversize loads should seek alternate routes if possible.

The repairs to the 70-foot long bridge will involve structural steel repairs. Built in 1933, the Route 4 bridge was added to New Hampshire’s “Red List” of bridges that need repair in May of 2014. A bridge inspection turned up extensive deterioration of portions of the steel plate girders, leading to the decision to close the bridge and begin repairs.

Approximately 2,400 vehicles cross the bridge daily.