Excavation works of both retaining shafts are finished. The final depth of the mountain and lake side shafts is respectively 34 m and 38 m.

The reinforced concrete wall is now being built in the mountain side shaft. The concreting phases are 4 m high and are done using a climbing form with working platforms placed on 3 different levels.

The pipe for drainage water linking the bottom of the lake side shaft and the Paudèze river will soon be executed by directional drilling. Afterwards, a reinforced concrete wall will also be built for this shaft.

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