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Air Rail Highway Bike/Ped Public Transit


For Immediate Release
August 26, 2014
Mark W. Richardson
Bridge Design Bureau
(603) 271-2731
Public Information Office
(603) 271-6495
Lane Restriction for Andover Bridge
US Route 4 Bridge Over the Blackwater River

The New Hampshire Department of Transportation announces the immediate implementation of lane restrictions on the US Route 4 Bridge (Br. No. 143/077) over the Blackwater River in the Town of Andover, New Hampshire. The bridge is located approximately 1/3 of a mile from the Andover/Salisbury town line.

Information evaluated from the results of a recent bridge inspection of the single-span, 70-foot long, steel through-plate-girder bridge determined the necessity of restricting all traffic to a single lane in the center of the roadway while on the bridge. This action is necessary due to extensive deterioration of portions of the steel plate girders.

This US Route 4 bridge will be restricted to alternating one-way traffic controlled by temporary signals. The lane restriction will be implemented over the next few days and will remain in place indefinitely. Options are being evaluated to determine the resources and time needed for, and the feasibility of bridge repair alternatives. A load posting/weight limit reduction is possible in the future.

Built in 1933, the US Route 4 Bridge was added to New Hampshire's "Red List" in May of 2014. Approximately 2,400 vehicles cross the bridge daily.

New Hampshire Department of Transportation
PO Box 483 | 7 Hazen Drive | Concord, NH | 03302-0483
Tel: 603.271-3734 | Fax: 603.271.3914

copyright 2015. State of New Hampshire