Hydrokarst specializes in rehabilitation of Hydraulic Structures and difficult access works : underwater up to -200m ; rope access ; confined area. HYDROKARST GROUP includes the following : - Hydrokarst France inland (Sassenage 38 - Head Quarters, Marseille, Ardèche, Toulouse), - SDEM HYDRO (Sassenage 38), - SAM HYDRO (Toulouse 31) formerly known as SAM PENDULE, - Hydrokarst Swiss (Sugiez / TSM PERROTTET), - Hydrokarst Indian Ocean (Reunion Island), - Hydrokarst South east Asia (Hong Kong), - Hydrokarst Tunisie, - Hydrokarst Gabon, - Hydrokarst Mozambique, - Hydrokarst Zambia, and more to come...