Preliminary and final design for the rehabilitation works of Beauregard dam in Valgrisenche, AO.
The oroginary structure is of arch-gravity type with a double curvature, 132 m of height, 394 m of crest length.
The downstream left bank, near the dam, is affected by a deep gravitative deformation of the slope. The interventions settled with an “Administrator delegated for urgent interventions regarding Beauregard dam” concern the removal of a risk situation with new water levels of the reservoir.
Studies, analysis and numerical models have defined the efficiency of an altimetric reduction of 52 m of the existent structure. This reduction coincides to 150.000 m3 of concrete volume to be demolished.
The works have covered:
The works were completed in compliance with the contractual times and in 2018 they were tested in accordance with Art. 14 of the Dams Regulation.
Compagnia Valdostana delle Acque S.p.A.
Preliminary, final and detailed design; works management