Tethered diver and ROV penetrations of up to deeper depths.
Installation and pressure testing of internal mechanical seals for joint leak repairs.
Pipeline and outfall retrofit of diffuser ports, manhole trunks and "hot taps" for branch pipe installation and extensions, repair and/or replacement of damaged pipe sections.
Removal of internal sedimentation, debris buildup and other blockages using hand dredging, pipe "pigging" techniques, and/or mucking of larger objects using divers.
Installation and repair of submarine cables and RCP, HDPE, welded steel, and ductile iron pipelines in rivers, bays, exposed coastal and open water environments.
Structural repair and concrete restoration of lined and unlined tunnels using epoxy injection, underwater forming, concrete line-pumping or tremie placement methods.
Installation of reference electrodes or sacrificial anodes with mechanical attachment at external joints or "wet-welding" externally or internally .
Anchoring of existing pipelines to sea bed, placement of concrete filled mats for armor protection and ballast, remedy unsupported pipeline spans .