Kölner Drehbrücke (Cologne Swing Bridge), 1896
Drehbrücke, Rheinauhafen
Cologne, September 2024
“The Kölner Drehbrücke (Cologne Swing Bridge) over the Rheinauhafen on the left bank of the Rhine between the Malakoff Tower and the Imhoff Chocolate Museum is Cologne's oldest bridge over the Rhine and is a listed building. It was opened on August 5, 1896, when the branch of the Rhine was being developed into a harbor. This industrial monument was completely renovated in 1986/87 and now belongs to the Imhoff Chocolate Museum Foundation, to which it also provides access. The repair of the hydraulic system, carried out in 1984, cost almost 1 million DM. The bridge is a steel truss bridge with spans of 28.334 m for the long arm and 18.30 m for the short arm. It is 10 m wide, including 5 m for the roadway. To compensate for the unequal weights, the short arm was paved with stone, and the long arm with wooden paving. The rotating mechanism is operated by an electro-hydraulic control system with a pressure of 5 MPa in the Malakoff Tower (from 1850). Originally, the pressure came from a power plant built for the entire port, which was expanded between 1892 and 1898. Before rotating, the bridge is raised by 11.2 cm. The clearance height is 8.20 m (Cologne gauge).” (Kölner Drehbrücke, Wikipedia)
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