Goldachviadukt, Railway bridge in Switzerland

The Goldachviadukt is a double-track stone arch railway bridge of the Swiss Federal Railways on the Rorschach–St. Gallen line, crossing the Goldach near Goldach SG. It was built by contractor Georg Schöttle from Stuttgart to plans by architect Karl Etzel and has five semicircular arches. The keystone was set on 11 November 1855.

The United Swiss Railways chose a double-track stone arch bridge with five semicircular vaults, unlike their single-track iron bridges over the Sitter, Glatt, Uze and Thur. Stuttgart entrepreneur Georg Schöttle built it to plans by architect Karl Etzel. An earthquake shook the site on 25 July 1855 and a flood tore away part of the scaffolding on 21 August; the keystone was set on 11 November 1855, the line opened on 25 October 1856.

The bridge is named after the Goldach, which it crosses just before the river reaches Lake Constance. Its five stone arches were built for the Vereinigten Schweizerbahnen, the private company that ran the St. Gallen–Rorschach line before the SBB took it over.

You can view the bridge from nearby roads or train stations and walk underneath the arches to see the stonework up close. The area around the bridge is easily accessible and offers good spots for visiting or taking photographs.

The construction faced unusual challenges: an earthquake struck the building site in 1855, and shortly after, a flood damaged parts of the scaffolding. Despite these setbacks, the work was completed and opened on schedule.