Pfaffensprung Diversion Tunnel Amsteg HPP - Floor Rehabilitation
Over two winters the exisitng tunnel floor was lined with butt joined granite blocks after two test areas were already created during the winters of 2011 and 2013.
The granite blocks were manufactured to specification and were fitted according to the block plan.
The tunnel was drained from December to the end of March.
- Length of tunnel: 270 m
- Width of tunnel: 4 m
- Size of blocks: 1 x 1 x 0.4 m
Scope of services
Tendering and construction supervision