Hydro Maintenance Service–HMS - provides mechanical engineering, on-site services and on-site project management services to the hydropower industry. HMS’s core competence is sedimentation management and design of special PONTOONS and ROVs that are the final weapons of this challenge . Our innovative technologies consider the significantly variable size of sediment or other particles you can find on the seabed of a basin. One can find clay (0.001mm) with large boulders (400mm) or sunken trees (2'000mm); this large variation is the real challenge. HMS offers specialized hydropower related training courses.