Guernsey-Jersey and North Sea Link interconnector subsea cables

DATE

June 2015

Location

Between Guernsey and Jersey

services

LaboratoryData solutionsEnvironmental Baseline SurveysHabitat AssessmentsSite Characterisation

In 2015, we acted as lead ecological consultants, working alongside Partrac, during a benthic survey programme in support of a wider Environmental Impact Assessment (EIA) for a proposed High Voltage Alternating Current (HVAC) interconnector cable between Guernsey and Jersey (GJ3)

Our work included the design of the proposed benthic sampling array and acquisition of ground-truthing seabed imagery, grab samples and undertaking of walk-over intertidal surveys to inform biotope and Annex I habitat mapping along the cable route corridor.

This was followed by all of the associated macrobenthic, particle size distribution and seabed imagery analysis.

Picture of two crew members sieving seabed samples

Project outcomes

This work fed into the final technical report submitted to Guernsey Electricity.

More recently, we’ve worked with Partrac to complete a detailed Annex I habitat assessment in support of the planned North Sea Link High Voltage Direct Current interconnector between Norway and the United Kingdom.

This involved assimilating and interpreting a large volume of seabed imagery and geophysical survey data to map the extent and quality of Annex I stony reef habitat along the proposed cable route.

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