The lowering of the route was also structurally challenging. The reason for this were the foundations of the town-side retaining walls at Morzinplatz and the translation of the Alsbach river. At the Morzinplatz, the workers on the surface initially encountered the old fortification walls, which made it more difficult for the local floating sand to carry out the construction work. Another problem was the recently built right main collecting channel. It was close to the track, but in a higher position than the track, so that its existence would have been endangered at the lowest setting. As a result, neither water could be pumped out of the foundations' pits during the construction of the railway supporting wall, which was to be laid five to six meters below the ground, nor could it be piloted - also because of the vibration. Therefore, cast iron fountain wreaths with a diameter of two meters were sunk, concreted and placed on these walls.