A steamtrain with 2-10-0 fourcylinder compound Gotthard freight steamlocomotive C 5/6 # 2978 of SBB Historic is crossing the 128 meter long and 25 meter high Rümlingen viaduct on the line from Olten via Läufelfingen to Sissach (Hauenstein line), inaugurated on may 1st, 1858. The viaduct over the Häfelfinger valley was built between 1855 and 1856 with yellow jura limestone. The viaduct was designed by the German railroad engineer Karl von Etzel, who, as construction manager for the Swiss Central Railway (Schweizerische Centralbahn SCB) from 1853, was also involved in planning the first Grandfey Viaduct in 1862 between Berne and Fribourg. Between 1864 and 1867, the Austrian Brenner Railway was built under his direction. The model for the Rümlingen viaduct was probably the engineering structures of the Austrian Semmering Railway around 1854 between Vienna and Trieste.
