Ravenna Bridge

The Ravenna Bridge is a 58-metre high and 225-metre long railway viaduct on the Höllental Railway line in the Black Forest, in Breitnau, Breisgau-Hochschwarzwald, Baden-Württemberg, Germany. The bridge crosses the Ravenna Gorge that ends in the upper Höllental valley, and has a grade of 12 metres . The origin of the name most likely comes from the French ravin for gorge.
The first structure was completed in 1885 and consisted of a steel cantilever span that rested on three mortared sandstone block pillars. The bridge had a slight curve, and trains were limited to a speed of 15 kilometres per hour and an axle load of 16 tonnes . Heavier locomotives and faster speeds led to the construction in 1926–27 of the current structure, a mortared stone viaduct with nine arches and an arch span of 20 metres , which also had the effect of straightening the railway line. The old bridge was then demolished, although the old abutments are still visible.

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