Our Services

Construction, Repair, Inspection & Maintenance

• Bathymetry survey.
• Block placing.
• Grouting (concreting) of damaged structure.
• Under water cutting & removal of piles.
• Erection of underwater structures.
• Dredging and de-silting.
• Under water videography.
• Inspection of pipe lines and cable laying.
• Data processing & preparation of reports.

• Construction and repairing of jetty's.
• Under water cutting & welding.
• Repair & rehabilitation of underwater concrete & hydraulic pipes.
• under water cutting & ships salvage.
• Under water visual inspection.
• Under water still photography.
• Non destructive testing of all under water marine structures.

Dams & Thermal Power Station

• Repair and sealing of sluice gates, emergency.
• Leakage arresting repairs using underwater epoxy treatment.
• Cleaning of gate grooves. S. Rod & plate.
• Under water cutting & welding.
• Underwater Chiping and drilling etc.

• Gates, stop lock Gates etc.
• Under water mapping, epoxy grouting, sealing of cavities cutting & welding.
• Under water rock blasting.
• Epoxy treatment for reservoir wall.
• Construction of Coffer Dam.

Pipelines & Tunnels

• Tethered diver and ROV penetrations of up to deeper depths.
• 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.
• Installation and repair of submarine cables and RCP, HDPE, welded steel, and ductile iron pipelines in rivers, bays, exposed coastal and open water environments.
• Installation of reference electrodes or sacrificial anodes with mechanical attachment at external joints or "wet-welding" externally or internally.

• Installation and pressure testing of internal mechanical seals for joint leak repairs.
• Removal of internal sedimentation, debris buildup and other blockages using hand dredging, pipe "pigging" techniques, and/or mucking of larger objects using divers.
• Structural repair and concrete restoration of lined and unlined tunnels using epoxy injection, underwater forming, concrete line pumping or tremie placement methods.
• Anchoring of existing pipelines to sea bed, placement of concrete filled mats for armor protection and ballast, remedy unsupported pipeline spans.

Concrete Restoration & Repair

• Installation and pumping of large mattresses to seal and cover damaged, broken and leaking concrete canal lining.
• Leak repairs in large basins using urethane injection techniques.
• Wood, steel and concrete piling and other structural repairs using tubular or nylon bag forms for concrete encapsulation under piers, wharves, bridges and dams.

• Structural repairs to concrete gate vaults, pipelines, concrete sheet piling, bulkheads and lined tunnels and basins using two-part epoxy injection techniques and materials.
• Repair of voids, cracks and spalls in concrete resulting from river scour, subsidence, mechanical damage, failed concrete and structural rebar corrosion on dam faces, intake/outlet structures, sea walls and other submarine structures.
• Localized quick-setting concrete patch repair and portable self contained 2-part epoxy injection underwater repair systems.

Structural Rehabilitation & Repair Mechanical & Civil Projects

• Intake structure rehabilitation including slide gate, track and seal, and manual operator and support guide repair/replacement on dams, canals and storage basins.
• Abandonment of pipelines, manhole structures, temporary and permanent plugging of pipelines and tunnels.
• Repair and maintenance to mechanical supports on sanitary outfall pipelines, water intake and discharge lines.
• Industrial and sanitary treatment plant maintenance and repair of mechanical structures in process tanks, basins, ponds, vaults and pipelines.
• Installation and maintenance of dewatering structures and portable dams in small basins, ponds, lakes, reservoirs and rivers.
• Ship husbandry, maintenance and repairs to the underbody of ships including anode installation, propeller replacement and shaft seal repairs, hull cleaning and propeller polishing, removal of bio-fouling prior to dry docking, cofferdam and plug installation for overboard discharge and intake valve service and replacement.

• Repairs, modification to and replacement of trash-rack and debris screen structures.
• Submersible pump maintenance, repair, removal and replacement.
• Submarine valve and hydraulic control system plumbing repairs and replacement.
• Repair and modifications to diffuser ports, aeration systems, and discharge pipelines.
• Repair to boat ramps, floating docks and walkways, water access platforms and steps.
• Anode installation for cathodic protection.

Underwater Welding, Cutting, Salvage & Demolition

• Structural repairs to sheet piles barriers and cellular cofferdam structures, bonding strap reinforcement repairs.
• Underwater dry habitat weld repairs for pipelines and other structural steel and support platform members; wet-weld repairs to screens and gates, sacrificial anode installations and continuity welds for impressed current protection for pipelines.
• Heavy equipment salvage, with engine preservation and "pickling", heavy lift rigging and water transport, and complete mechanical restoration of farm equipment damaged from flooding.
• Modifications to reinforce fish ladders, basin walls, and RCP submarine outfalls and outlet/intake structures.

• Ship husbandry, maintenance and repairs including repair of side and bottom shell damage, AWS D 3.6 coded "wet-welding" for patch installation, sacrificial anode installation, propeller trimming, installation/removal of rope guards and c able removal from propeller and shaft.
• Concrete demolition and removal using impact hammers and breakers, core drilling, roto-impact and rock drilling, hydraulic concrete splitters, diamond wire and circular saw cutting, and underwater explosives.
• Steel sheet and support pile oxy-arc cutting and removal, demolition and removal of steel rail track and structural steel debris.
• Demolition and removal of large concrete piers and columns, concrete dams, wharf and dock pilings, sea walls and abandoned pipeline, penstock, tunnel, and manhole concrete plugs.

Dredging, Derbis Removal & Excavation

• Pipeline cleaning and sediment removal using "sewer ball" pigging, directional jetting and suction, and pressure pump backwater / reverse nozzle flushing techniques.
• High pressure water blasting for epoxy coating removal, biofouling and corrosion or scale removal, and structural/substrate preparation of weak or damaged concrete for encasement and sealing repair.
• Debris removal for retrofit and repair to bridge piers, footings and foundations.

• Airlifting and water-lift educators for removal of biofouling debris accumulation, excavation of mud, clay and sandy bottoms to expose pipelines, cables, and structures.
• Pipeline and cable burial or exposure for protection or exposure to perform repairs.
• Sediment removal in and around intakes on dams, siphons, pump stations and low level basins, marinas and boat ramps, adjacent to sheet pile cofferdams during shoreline and/or stream bed restoration, and for any marine construction.

Equipments List

We provide all underwater & allied instrument services throughout the country with the help of latest & modern techniques available.