Unterwasser, Switzerland
Concept Study 2011, project 2013–2014, realization 2014–2015

The Chäserrugg at 2262 meters / 7420 feet is the easternmost peak of the seven mountains that make up the Churfirsten Massif. It rises up gently from the Toggenburg to the north and becomes a steep cliff to the south, plummeting almost 6250 ft down to the Lake of Walensee. The high flat plateau formed by the Hinterrugg, Rosenboden and Chäserrugg stands in great contrast to the steep, precipitous walls of the cliff. Behind this impressive topography, the backdrop of the Alps stretches all the way to the horizon. The region has been accessible since 1972 via the Unterwasser-Iltios-Chäserrugg Cable Car and can be reached in less than an hour from Zurich and St.Gallen.

Ever since the cable car went into operation, the restaurant has been provisionally located in the housing originally built for the construction workers. Now it has been torn down to make room for a new restaurant. The station, a pragmatic steel structure on a concrete foundation typical of the 1970s, has remained and been clad in a different façade. The new mountain restaurant is placed perpendicular to the station, extending horizontally along the mountain panorama towards the south. A large roofed area connects the two structures and creates an outdoor arrival hall.

The new station is constructed in solid wood on a concrete foundation. It was prefabricated by local craftspeople in the valley and assembled on top of the mountain in the course of a summer. The interior was completed the following winter. We decided to use wood because we wanted to echo local tradition. Equally important was a thoughtful exploitation of resources: except for the crane, which was transported by helicopter, all of the parts required for the building were transported by cable car in the course of its regular runs. The excavated earth was used to make the concrete and also as an ingredient of the gravel surfacing.

The restaurant is a long, flexible space, its atmosphere marked by the repetitive woodwork from locally sourced spruce trees. The low-hung roof resting on closely placed columns is the dominant element of the building with a covered terrace in front. Glazed on three sides, the restaurant offers spectacular views of the scenery. Niches with built-in benches and tables occupy the fourth side of the room. Each niche has its own window and thus its own framed view of the mountainscape.
Herzog & de Meuron, 2015



Herzog & de Meuron Team

Partners: Jacques Herzog, Pierre de Meuron, Christine Binswanger (Partner in Charge)
Project Team : Michael Fischer (Associate, Project Director), Bergstation: Beatus Kopp, Hendrik Steinigeweg (Project Managers) , Konzeptstudie: Salomé Gutscher (Project Architect)
Roman Aebi (Workshop), Michael Bär (Associate), Frederik Bo Bojesen, Leif Buchmann, Yannick Claessens, Santiago Espitia-Berndt, Alexander Franz, Alen Guberinic, Justin Hui, Maria Krasteva, Victor Lefebvre (Workshop), Severin Odermatt, Philipp Schaefle, Kaspar Stöbe, Christoph Wassmann, Freya Winkelmann

Toggenburg Bergbahnen TBB AG, Unterwasser, Switzerland

Client Representative:
Mélanie Eppenberger, President TBB AG

Construction Management: Ghisleni, Rapperswil, Switzerland
HVAC Engineering: Amstein + Walthert, St. Gallen, Switzerland
Structural Engineering: Schnetzer Puskas Ingenieure, Basel, Switzerland; Pirmin Jung, Sargans, Switzerland; Schällibaum, Herisau, Switzerland

Building Physics: Zimmermann & Leuthe, Aetigkofen, Switzerland
Catering Consultant: Gastro-Fachplanungen Ruedi Menet, Walzenhausen, Switzerland
Fire Protection: Amstein + Walthert, St. Gallen, Switzerland
Interior Consulting: Rondelli Consulting, Zürich, Switzerland

Electrical: Kolb Elektro, Oberriet, Switzerland
Elevators: AS Aufzüge, St Gallen, Switzerland
Metal Work: Tobler Metallbau, Alt St. Johann, Switzerland
Paint Work: Malerei Grob, Neu St Johann, Switzerland
Plumbing: Tobler Haustechnik, Neu St Johann, Switzerland
Scaffolding: Roth Gerüste AG, Pratteln, Switzerland
Heating: Lippuner AG, Grabs, Switzerland
Structural Work: Pozzi AG, Wattwil, Switzerland
Wood Construction: Blumer Lehmann ARGE, Gossau, Switzerland

Additional Information:
Prüfingenieur: Casutt Wyrsch Zwicky, Chur, Switzerland
Schneegutachten: WSL-Institut für Schnee - und Lawinenforschung SLF, Davos, Switzerland
Windgutachten: I.F.I. Institut für Industrieaerodynamik GmbH, Aachen, Germany

Building Data:
Site Area: 6'740sqm / 72'549sqft
Gross Floor Area: 2'500sqm / 26'910sqft
Number of Levels: 3
Footprint: 1'360sqm / 14'639sqft
Building Dimensions: Length 45m / 148ft; Width: 53m / 174ft; Height: 15m / 49ft



Luis Fernández-Galiano (Ed.):  Arquitectura Viva Monografias. Herzog & de Meuron 2013-2017.

Vol. No. 191-192, Madrid, Arquitectura Viva SL, 12.2016.