The government did not support these projects because of high construction costs and the low revenues expected. The 1914 proposal for an extension to Altenberg failed at the beginning of the First World War, but was then started as an emergency project in 1919. Within four years the 5.5 km-long roundabout line from Geising via the Geisingberg to Altenberg was opened on 10 November 1923. Large sections of the railway line were destroyed during a devastating flood on 8 July 1927.