The Boyne Bridge carrys the Northern Motorway (M1) across the Boyne River, approximately 3km west of Drogheda and some 45km north of Dublin.

The River Boyne is approximately 150m wide and consists of two channels separated by Yellow Island. The river is tidal at the crossing.

The Boyne Valley is one of the most historically significant sites in Ireland. The ancient monuments of Newgrange, Knowth and Dowth lie within 3-5km of the crossing. The three main Williamite crossings of the river at the Battle of the Boyne in 1690 took place adjacent to the bridge location.

Facts and Figures

Bridge was built in 2002
Total length 353.5 m
Main span 170 m
Back span 43.5 m
Structural Concrete 19000 cubic meters
Reinforcement 2500 tonnes
Structural Steel 2200 tonnes
15.7mm diameter strand in stays 333 tonnes (283,000m total length)
Height of motorway above water level is 20 m
The pylon is an inverted ‘Y’ and is 93m high
The bridge is fitted with wind shields to protect vehicles when crossing
The estimated cost of the works at the time of the tender was €24.4m