Horizon Geosciences

Survey and geotechnical services

CASE STUDY, USA

Client: Vineyard Wind LLC
Year: 2018

Horizon Geosciences has recently performed a combined geophysical and geotechnical investigation of the Vineyard Wind Offshore Windfarm, Offshore Massachusetts, USA for Vineyard Wind LLC (a joint venture company formed by Copenhagen Infrastructure Partners and Avengrid Renewables). The objective of the survey was to collect hydrographic, geophysical and geotechnical data to provide sufficient information to support studies and preparation for the Construction and Operations Plan and Facilities Design Report for the wind farm.

The works were performed by Horizon’s DP2 vessel Horizon Geobay and the Kommandor Iona.

A number of deep geotechnical boreholes were drilled at the specific locations on the site to provide soil data for foundation engineering and installation assessment. Work included sampling and coring in down hole mode together with PCPT testing and P-S logging. A complex and demanding lab testing programme was undertaken to provide interim results throughout the deliverables phase.

Approximately 2,300km of geophysical survey lines were run by the Kommandor Iona acquiring bathymetric, sidescan sonar, sub-bottom data and magnetometer in order to provide data for seabed clearance, inter array cable routing, and lateral variability assessment.

Both vessels worked closely with Vineyard Wind and BOEM to ensure that the stringent environmental procedures and project specifications were achieved.

“The future opportunities in US offshore wind are developing quickly so being involved in this prestigious project to undertake one of the earliest ground investigations was a great achievement for Horizon’’.

Lance Hanson, Projects Director