Fugro Surveys Viking Link

Deployment of a 2 m scientific beam trawl used for the collection of mobile epibenthic species. (Photo: Fugro)

Posted by Eric Haun

Fugro said it completed a seabed survey for the Viking Link, one
of the longest DC electricity interconnectors that will link the
U.K. and Danish electricity supplies.

The Viking Link, a joint venture between the U.K.'s National Grid
and Denmark's Energinet, is a proposed 1,400-megawatt high
voltage direct current electricity link, which passes under the
North Sea, from Revsing in Denmark, to Bicker Fenn in the U.K.
The interconnector will enable more effective use of renewable
energy, access to sustainable electricity generation and improved
security of electricity supplies.

Awarded in February 2016, the contract to survey the
630-kilometer marine section of the interconnector's route
involved many of Fugro's specialist disciplines. The survey
started in March 2016 in Danish waters, and crossed the southern
North Sea through German and Dutch territorial waters, before
ending in the U.K.

"With a vast workscope, this project demonstrates how we manage
an array of specialist survey disciplines," said Amy Bergman,
Fugro's Senior Project Manager. "Onshore, our work encompassed
topographical and geophysical surveys at proposed landfalls in
the U.K. and Denmark while offshore, we used 10 different survey
vessels to perform inshore, nearshore and offshore geophysical
surveys and geotechnical investigations."

Water depth and sediment data were collected using multibeam
echosounder, side scan sonar, magnetometer, pinger and sparker
over the full corridor length of the link. Offshore and nearshore
geotechnical investigations included vibrocore and cone
penetration testing.

A remotely operated vehicle (ROV) was deployed to identify and
locate subsea assets, such as cables and pipelines that cross the
proposed Viking Link route, and measure the burial depth of the
assets. The ROV also recorded video and multibeam echosounder
data. To identify the ecological environment, Fugro carried out
benthic investigations including grab samples and photography.

The survey was completed in six months, and the data gathered by
Fugro will inform further feasibility assessments of the route's
viability. Construction on the Viking Link project is planned to
start in 2018 and is planned to be operational by 2022.

Mar 9, 2017

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