The viaduct is located on the Rhaetian Railway's metre gauge line from Chur to the holiday and recreation resort of Arosa (the Chur-Arosa line), between Peist and Langwies, at a place known as Matten-Gründji.
Leaders of the communities of Klosters, Davos, Castels, Schiers, St. Peter (part of Schanfigg), Langwies, Churwalden, Belfort, Maienfeld and Malans (which was under the jurisdiction of Neu-Aspermont) met and agreed to protect their rights, to only collectively enter other pacts and treaties, to appoint judges from each community and to re-swear the pact every twelve years.