Lennetal bridge, Road bridge in Hagen, Germany

The Lennetal Bridge crosses the Lenne valley with a length of nearly 1,000 meters and features two parallel steel box girders with concrete roadway decks for each direction. The structure carries traffic in both directions across six lanes and is equipped with noise protection walls.

The original bridge was built in 1967 and carried traffic on the A45 motorway for many decades. As it aged and demands grew, construction of a modern replacement structure began in 2013.

The bridge carries the A45, known as the Sauerlandlinie, north of the Hagen motorway interchange, crossing the Lenne, the Ruhr-Sieg railway line, factory sidings, the L 674 and the K 1. Its 1967 prestressed-concrete deck rested on six longitudinal girders with spans of about 45 metres.

The bridge is normally open to vehicle traffic as part of the A45 motorway network and may experience delays during poor weather or accidents. Pedestrians and cyclists cannot access the bridge, as it is a motorway-only route.

On 5 March 2021, the new bridge deck was slid laterally about 20 metres to its final position in six hours, at roughly three metres per hour. The contractor was Hochtief Solutions AG; the client was the Federal Republic of Germany, represented by Autobahn GmbH. The full crossing is 979.5 metres long.