Coastline Surveys Completes Geotechnical Investigation for Navitus Bay

SeaDiscovery.com
Monday, May 13, 2013
Photo: Coastline Surveys Ltd.

Coastline Surveys completed a geotechnical investigation of the seabed cable route at the proposed Navitus Bay offshore wind park, off the south coast of England.

Coastline Surveys, the Falmouth-based marine data consultancy, was chosen to extend previous phases of work as the main contractor. The team has provided geotechnical expertise to examine the viability of the proposed cable route that will transport energy from the wind park to shore.

Utilizing its 24-meter survey vessel, MV Flatholm, along with their C-COREHP vibrocorer, Coastline Surveys successfully completed sampling at 22 locations along the planned route for the cable. The route runs from the shoreline to approximately 12 miles off shore.

A key requirement for Navitus Bay was the acquisition of high quality samples for environmental and potential archaeological analysis.

On investigating the ocean floor, the team expected to find marine sands overlaying bedrock, with a range of depths throughout the area. It soon became clear that the site was made up of a variety of soil conditions ranging from soft silts to dense sand and clays.

Navitus Bay required undisturbed quality samples where possible, but particularly around the palaeochannels, where fine grained material and peat deposits were also expected.

Coastline Survey’s C-COREHP unit has a real-time Penetrometer fitted to it, to monitor the rate of penetration during sampling. This was especially invaluable in areas of softer loose sediments as it allowed the geotechnical team to recover high quality samples with reduced disturbance. 

The stiff clays and dense sands that the team encountered presented a different kind of challenge. The class leading power and weight of the C-COREHP unit meant the team was able to achieve good depths in these conditions, penetrating the ground up to one meter into the underlying stiff clay in some locations.  The penetrometer was particularly useful in these difficult conditions allowing the team to realize when they wouldn’t be able to recover any more sediment. As a result, the team was able to terminate their tests when appropriate, saving time and costs whilst preserving sample integrity.

Lab testing and reporting was completed at Coastline’s facility in Lowestoft. The Geotechnical logs, soil descriptions and core photography provided to Navitus Bay were of sufficient quality and standard to assist with identification of archaeological features.

www.navitusbaywindpark.co.uk

 

Maritime Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Wind Power

CWind Launches New Vessel

CWind, a provider of integrated services to the offshore wind industry, has launched its new vessel CWind Fulmar in a naming ceremony in Brightlingsea. The CWind Fulmar, built by CTruk Ltd.

Policy Uncertainty Threatens to Slow Renewable Energy Momentum

IEA forecast sees renewable power as a cost-competitive option in an increasing number of cases, but facing growing risks to deployment over the medium term. The

CWind Wins 3-year O&M Services Contract

CWind, a provider of services to the offshore wind industry, have signed a three-year contract to provide crew and equipment transfer for DONG Energy and Scottish

Ocean Observation

BMT WBM to Showcase TUFLOW at World Bank Seminar

BMT WBM ( (BMT), a subsidiary of BMT Group Ltd, a leading international engineering and risk management consultancy, is delighted to announce that it will be presenting

Rosneft Restores Meteorological Observations System in Kara Sea

As part of a large-scale summer Arctic research expedition "Kara-Summer - 2014" a meteorological station was installed that meets the latest modern requirements for such equipment,

Schlumberger Launches First Photorealistic Reservoir Geology Service

Schlumberger today launched the Quanta Geo* photorealistic reservoir geology service at the Offshore Northern Seas Annual Conference and Exhibition. The new

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Maritime Standards Naval Architecture Ship Repair Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1695 sec (6 req/sec)