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Windtech International May June 2024 issue






TDI-Brooks conducted a site investigation program in two offshore wind blocks in state and federal US waters. The projects involved surveying over 20,000 line-kilometres of analogue and either single or multi-channel seismic in lease blocks and cable routes along the coasts of New York and New Jersey.
Various tasks were carried out, including offshore geophysical surveys, UHRS detailed surveys, archaeological identification surveys, light geotechnical coring, and benthic sampling.
TDI-Brooks utilised three survey vessels: the R/V Brooks McCall, R/V Miss Emma McCall, and M/V Marcelle Bordelon. The geotechnical survey involved over 150 pneumatic vibracores (pVCs) and over 150 Neptune 5K cone penetration tests (CPTs) gathered from both lease areas and along the offshore cable route (OCR). Along with multiple export cable route surveys, a reconnaissance survey covering the entirety of the lease area with 150-metre spaced survey lines was conducted, followed by a more detailed archaeological survey with 30-metre spaced lines.

The goals, determined by the collected data, were to assess the conditions of the seabed and sub-seabed, including potential risks such as geohazards or man-made hazards, which could impact the installation of wind turbines and subsea cables in the future.
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