Retrofitting Sylvenstein dam with a cut-off wall and control gallery

The Sylvenstein dam was upgraded after 50 years in operation, with the provision of a diaphragm wall (a two-phase cut-off wall) at the existing dam and subsoil, as well as a new measurement system consisting of drainage piles for seepage and a control gallery. These additional upgrades are considered as preventative measures to provide for the possible consequences of climate change, as the magnitude and frequency of recent flood events imply that larger impacts on the dam could be expected in the future.