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Nearshore

Ground investigation should be considered the first step of any development process, thus enabling appropriate consideration in the design stages of a project.

Innovative Approaches

The main purpose of ground investigation is to reduce and control ground-related risks in construction. Understanding the ground enables us to mitigate those risks and establish the cost, suitability and feasibility of a project.

Our teams use innovative approaches to working in nearshore and ultra-shallow waters to conduct geotechnical surveys that will inform and support the design of the landfall methods for the cables that will carry power from offshore wind farms to the shore.These works are intrinsic in making clean energy available for all to use.

Jack up Barges
Jack-up barges

We operate our own fleet of jack-up barges, based in Europe and North America, that can easily be deployed worldwide given their modular construction. Our most versatile units are capable in working in water depths of up to 25m, and we have other solutions for working in deeper water. These spreads are the ideal solution for working in intertidal areas and are suitable for most nearshore ground investigation scopes.

  • Modular jack-up systems
  • Sonic drilling, direct push sampling, rotary coring
  • CPT: top push and wireline systems
  • Water depths up to 25m
  • Fully crewed, operated and managed by our own personnel
  • IJUBOA members
Quin Delta
Quin Delta

Ideal for ports & harbors and near bridges. Self-propelled ocean-going vessel with a shallow draft of only 5ft that allows access to smaller tributaries and tidal areas. Fast and stable anchoring using 21m long spuds reduces footprint and full galley, 8 berths & head on-board for full-time operation.

  • Equipped with marinized Mobile B-80 dril rig
  • Capable of pushing CPT with 20-ton reaction force.
  • Sampling: SPT, Cal-Mod, Shelby Tube, HQ/NQ coring, piston sampler
  • Vibracore and gravity core sampling
  • 21.3m long spuds for anchoring in water up to 18.2m deep (60ft)
  • 3 and 4-point anchoring for deeper water
  • Dimensions: 30.5m long, 9m beam, 15.2m tall
Amphibian Barge
Amphibious carrier

Equipped with drilling and cone penetration testing gear, this vessel can go from land to water up to 15 feet deep. It can smoothly transition from the surface to floating, which makes for efficient ground investigation in near-shore and shallow environments.

  • Only vehicle capable of floating in 1.5m of water
  • Traverses soft sensitive soils and operates in up to 20m of water (sheltered)
  • Ideal for environmentally sensitive wetland, lake and protected water habitats
  • Smal footprint ensures lowest possible environmental/animal impact
  • Tools and technology developed in-house to effectively work together (CPT, Seismic, sampling)

Featured Projects

Cromarty Firth

Port of Cromarty Firth


Our team was appointed by Cromarty Firth Port Authority Ltd, a busy port in northern Scotland servicing floating North Sea infrastructure, to conduct a marine ground investigation to characterize ground conditions ahead of the port's phase 5 development, including quayside extension and laydown area. The continued development of the port required information on the superficial soils and underlying bedrock to advise the design parameters of the proposed piled quay walls.

The scope of work included:

  • 37 overwater boreholes by sonic/rotary drilling
  • 11 cone penetration tests, 9 with sonic/rotary follow-on
  • Marine Scotland testing for dredge disposal
  • Works were completed off the Causeway Giant 1 (CG1) Combifloat C5 Modular Jack-up Barge
  • Factual ground investigation reporting
Ocean Wind1

Ocean Wind One


In summer 2022, team members from Seas Geosciences, including Gregg Drilling, conducted a successful geotechnical survey that supported design of the landfall methods of the cables that will carry power from offshore wind turbines to the shoreline. Our work involved two primary services: cone penetration testing, which profiles the soil up to 20 feet below the seabed, and companion drilling and sampling, which removes soil cores for analysis in a lab.

Seas Geosciences used an innovative approach to working in ultra-shallow water for this project. Teams deployed an amphibious carrier - equipped with drilling and cone penetration testing gear - to go from land to water up to 15 feet deep. This vessel can smoothly transition from the surface to floating, which makes for efficient ground investigation in a beach situation like this one. Novel solutions like this enabled us to execute our part of the project within three weeks, safely and on time.

SCAPA

Scapa Deep Water Quay


The proposed development of Hatston Pier and deep-water quay at Scapa Flow in Scotland's Orkney Islands called for investigation of the superficial soils and bedrock geology to progress the design and construction. The project's remote location and high HSQE standards required a trusted network of sub-contractors and suppliers and careful planning from inception to delivery. Work was completed on time, despite challenging weather and logistics.

The scope of work included:

  • 29 no. overwater boreholes by sonic drilling and Geobor S wireline coring
  • 10 no. wash probes by sonic sampling methods
  • 1 no. surface sediment sample by Van Veen grab sampler
  • Environmental sampling of the soft sediments for Disposal at Sea analyses
  • UXO Survey
  • Overwater works were completed out off an C5 Combi-float Self Elevating Platform supplied by OCM
  • Factual ground investigation reporting
Naver Bridge

Naver Bridge, Scottish Highlands


Our team investigated superficial soils geology to aid design and construction of a replacement bridge in this remote and challenging location. We overcame the difficulty of very dense gravels and cobble/boulders to depths of 50m bgl using our experience with sonic drilling techniques from other marine projects. By carrying a broad stock of drill bits, we were able to react to different rock types and ensure continued rock coring. Another significant challenge was the remote set up of the barge being constructed on a tidal river near an existing bridge in an area of limited space. Thanks to careful planning and a network of trusted subcontractors, the work was completed safely and ahead of schedule.

The scope of work included:

  • 4 no. overwater boreholes by sonic boring and Geobor S wireline coring
  • 5 no. boreholes by rotary drilling sampling methods
  • 9 no. boreholes by sonic drilling sampling methods (land)
  • 9 no. machine dug trial pits with infiltration tests in four pits
  • 12 no. road pavement cores
  • Indirect CBR tests at thirty-five locations
  • Pebble survey and marine geophysical surveys within the River Naver
  • Downhole televiewer surveys at three locations
  • Overwater works were completed out of an C5 Combi-float Self Elevating Platform

People Powering the Planet

Neil Haggan

Neil Haggan

MARINE CONTRACTS MANAGER

Europe's offshore wind market is a growing part of the portfolio of projects Neil oversees while working closely with clients and their consultants.

Matthew Gilbert

Matthew Gilbert

ASSOCIATE GEOLOGIST & DATA MANAGER

Matthew assists with the processing and reporting of AGS data, digital monitoring records and CPT results. Behind the scenes, he works to improve the efficiency of data acquisition and usage.

Chris Anderson

Chris Anderson

GEOTECHNICAL ENGINEER

Chris specializes in soil stabilization, a ground-improvement technique that can be used for construction, to form retention walls, to remediate failed slopes and to contain ground contamination.