Subsea Construction Services LLC is a team of driven, committed and highly skilled professionals with an extensive track record of delivering successful, unique projects.

Since the company's establishment in 2007, we have laid over a 1,000 kilometres of subsea cables, surveyed hundreds of thousands of square kilometres of water areas, constructed kilometres of hydraulic structures and facilities.
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
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Company profile
Every new project is a yet another opportunity for us to put our skills and expertise into use by developing and implementing the best possible solutions to every task at hand.

We are continuously expanding and upgrading our technical resources. Our highly qualified staff and modern, forward-looking management approach have repeatedly demonstrated their efficiency in implementing set objectives, with evidence of endorsement and overwhelmingly positive feedback from our clients.
years
of successful market presence, continuous growth, development and impeccable performance of the most challenging tasks
12
km
of pipes of various diameters and applications installed by our engineers
200
s.k.
of water areas surveyed by the company's specialists
500 000
facilities
successfully commissioned
130
SCS LLC in numbers
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
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Since 2008, Subsea Construction Services LLC has been conducting diver inspections using specialised underwater equipment and capital repairs of the entire network of trunk line underwater crossings (TLUC) in the North-West Region of the Russian Federation.
What we pride ourselves on
SCS LLC has surveyed 177 TLUCs, which is equivalent to 113 km and 5650000 s. m. of the bottom part of underwater crossings. The company has performed inhouse overhauls of 54 TLUCs using its own resources.
The installation of a 4,138 km-long pipeline inside an underwater trench at harbour crossings using the socalled bottom tow method (at the Vysotsk seaport, Leningrad Region).
Conducting emergency ship raising operations to recover the wreck of a 240-ton dredger before the launching of a 54-gun fourth-rate battleship Poltava at the Hercules yacht harbour in May 2018.
The construction of a docking facility for passenger vessels at the St Petersburg sea port.
The construction of a cultural and historical centre Poltava that involved a range of hydraulic and dredging operations with the total contract value amounting to 5.5 bln rubles.
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
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Front end engineering design, construction and installation works.
Financials
Revenue dynamics within the company's area of operations over the period 2020-2022. (Rub.)
1,3
bln
2,1
bln
2,9
bln
2020
2021
2022
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
12
Work areas
Design engineering
Construction
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
12
Design engineering
Design
  • Pre-FEED works (business plans, investment feasibility studies)
  • Development of design documentation for construction
  • Technical and engineering support
Project management (ЕРСМ)
Construction works management:
  • monitoring and supervising works performed by subcontractors
  • cost management and planning
Construction supervision:
  • hydrographic and topographic-geodesic support
  • environmental monitoring
  • design appraisal
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
12
Construction
Construction of hydraulic structures
  • Dredging operations
  • Shoreline reinforcement
  • Land reclamation
  • Construction of ports, piers and dock
Underwater engineering operations
  • Construction, repair and maintenance of hydraulic structures
  • Cable and oil & gas pipeline installation and condition monitoring
  • Surveying water areas, conducting underwater search and recovery operations
  • Cleaning up water areas
  • Wreck raising and equipment removal operations
  • Rescue and emergency operations
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
12
Geography
St-Petersburg (Baltic Sea Region)
Murmansk
Kaliningrad
Leningrad Region
Tver Region
Smolensk Region
Novgorod Region
Core competencies
  • Integrated design & engineering, general contracting (ЕРС, ЕРСF, EPCM)
  • Synergy of design and construction
  • Reducing construction and operation costs through optimising design
    and engineering solutions
  • Adherence to international project management standards
  • Implementing sophisticated design & construction solutions tailored to the industry needs
  • Mobility and broad geographic coverage
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успешно работаем на рынке, постоянно развиваясь, наращивая компетенции и решая сложнейшие задачи
12
Our services
Hydraulic works
  • Dredging operations
  • Construction, repair and maintenance of hydraulic structures
  • Conducting all kinds of underwater engineering operations, including but not limited to: welding, cutting steel and reinforced concrete structures, underwater blasting
  • Land reclamation
  • Shoreline reinforcement
  • Quay infrastructure development
  • Construction of ports, piers and jetties
Repair, reconstruction and maintenance of hydraulic structures
  • Identifying the thickness of sheet piling or defects of reinforced concrete wharf walls
  • Inspecting for non-conformances and deviations from project parameters
  • Cleaning up receiving chambers, wells, feeder canals and inverted siphons from sedimentation and debris
  • Installing and dismantling various steel and reinforced concrete underwater structures
  • Underwater works and blasting operations
  • Underwater thickness gauging. Assessing the condition of the vessel's underwater body, residual sheet pile wall thickness of various underwater objects and steel structures
  • Repairing hydraulic structures
Cable and oil & gas pipeline installation and condition monitoring
  • Installation and repair of underwater utility lines of various lengths, including pipe crossings of main oil & gas pipelines, electric cables and communication cables
  • Diagnostics and diver inspections of trunk lines using specialised underwater equipment, communication line positioning
Surveying water areas, conducting underwater search and recovery operations
  • Surveying water areas for explosive objects and other technology-related objects
  • Search and removal of small sunken objects
  • Plot soundings and bathymetric surveys of specified water areas
  • Underwater photography and video recording
Water area clean-up operations
  • Cleaning up waterways and navigation channels
  • Cleaning up water reservoir beds and beaches
  • Removing bottom vegetation
  • Dismantling underwater reinforced concrete structures
Wreck and equipment removal operations
Full scope of ship raising operations from project drafting to implementation
Rescue and emergency operations
  • Repairing damage on a floating vessels' hull (welding, cutting); placing collision mats of various types
  • The excellent training level of our staff and available technical resources allow us to arrive on the site within the shortest possible time and initiate offline operations in cooperation with the Ministry of Emergency Situations experts
Crane suspended vibro hammer, total weight over 14 tons
Deployable equipment
Crawler crane with a load capacity of over 130 tons
Pipe-layers with a load capacity of over 90 tons
Excavators, including ones with extended high-lift booms
Dredgers with an output of over 300 m3/hour
Bulldozers, dump trucks and tractor units with a load carrying capacity of over 60 tons
Mobile welding stations, including machine and automatic welding stations
Diesel power plants with a capacity of over 100 kW
Excavator pontoons for riverbed operations, load carrying capacity over 90 tons
Perforation machine / Horizontal auger drilling machine, pulling force - over 19 tons
Crane trucks, load carrying capacity over 25 tons
Hydraulic jet, output – from 15 m3/hour on land
Fueling trucks, compressors, pressure testing units, blower sets, dredge pumps
Approval documents
Subsea Construction Services is committed to delivering a full scope of services relating to the design, construction and hydraulic engineering operations in accordance with applicable standards, guidelines and regulations of compliance monitoring and supervisory authorities that coordinate the provision of specialised services and operations.

Subsea Construction Services LLC has all necessary licenses, certificates, SRO (self- regulatory organisation) permits, expert asses- sment reports and other authorising documents.
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