Staustufe Klingenberg, Lock and barrage on the Main in Klingenberg am Main, Germany

The Staustufe Klingenberg is a lock and barrage system on the Main River that controls water levels for vessel passage. The facility comprises multiple structures that work together to maintain navigable conditions along this stretch of the waterway.

The Klingenberg barrage belongs to the third construction phase of the Main's canalisation, carried out between 1926 and 1941. The structure was completed in 1930 and entered service in 1931. Excavated material from the works was used to raise a flood embankment protecting the old town of Klingenberg from later flooding.

The lock is a stop on the Route der Industriekultur Rhein-Main, which marks industrial monuments of the Rhine-Main region. Its buildings follow the functional forms of the Bauhaus, and the weir's three steel roller gates, each about 35 m wide, are raised out of the river during floods. A footbridge above the weir serves maintenance.

Visitors can view the facility from surrounding pathways and understand how it operates. The best vantage points are found by walking along the Main riverbanks in the area.

The lock chamber was drained in April 2012 and its original riveted gates replaced with welded ones 6.70 m high; shipping on the Main was halted for several weeks for the installation. The boat lock beside the chamber, 2.50 m wide and 11.60 m long, is out of service.