TDG performs underwater inspection, and maintenance works for hydroelectric facilities and dam structures. Capabilities cover decompression diving to 50 metres, confined-space access, intake inspection, trash rack replacement, penstock entry, structural mapping and stoplog operations.

An onsite hyperbaric chamber is available where required, supporting safe deep-diving and decompression work. Service delivery aligns with the technical and safety expectations of utilities and engineering partners involved in critical water infrastructure.