Flood protection of the Sarneraa valley
Sarnen (CH)
Canton of Obwalden, CH-6061 Sarnen
Department of Building and Spatial Development
Office for Forest and Landscape
Department Natural Hazards
of the consortium:
  • Gruner AG, CH-4020 Basel
  • ewp bucher dillier AG, CH-6005 Luzern
Time of Completion
09.2018 – 06.2022
Contract Sum
CHF 79 Mio.
Execution of the Work
ARGE HWS Marti (turnkey project)
Consortium Partners
Marti Tunnel AG, CH-3302 Moosseedorf
Marti Bauunternehmung AG Lucerne, CH-6002 Lucerne
Lead Company – Technical and Commercial Lead
Marti Tunnel AG, CH-3302 Moosseedorf
Marti Tunnelbau AG
Seedorffeldstrasse 21
CH-3302 Moosseedorf
Tel. +41 31 388 75 10
Marti Tunnel AG
Seedorffeldstrasse 21
CH-3302 Moosseedorf
+41 31 388 75 10