Type of infrastructure:
Location:
Country:
USA
Implementation period:
2023-ongoing
Implemented by:
ECOncrete and Prysmian
TRL:
9
Funding:
Vineyard Wind

Knowledge sharing

ECOncrete fosters the open exchange of knowledge by collaborating with universities and research institutes for both testing and monitoring activities. ECOncrete also presents their findings at scientific and industry-focused conferences and webinars, e.g. the OCEaN NID webinar series (2023) and the OCEaN best practice fair (2024). The project is also referenced in the Rich North Sea NID Toolbox (see HERE).

Database Project

Cable Protection & Stabilisation with ECOncrete Marine Mattresses

Objectives

To protect and stabilise subsea power cables while creating habitats that support marine biodiversity within offshore wind infrastructure.


Short description

In 2023, ECOncrete supplied marine mattresses at the Vineyard Wind 1 offshore wind farmFirst large-scale offshore wind energy facility in the United States, located off the coast of the state of Massachusetts. It comprises of 62 wind turbines and has a total capacity of 806 megawatts (MW), producing enough clean energy for over 400 000 homes. . This Nature Inclusive Design (NID) solution protects and stabilises subsea power cables in an area where mitigation measures are needed while creating diverse habitats to enhance marine biodiversity.

Before deployment, the hydraulic stability of the ECOncrete marine mattresses as a cable protection solution was assessed under different boundary and metocean conditions during an extensive physical model test campaign at the Environment Coast and Ocean Research Laboratory in the Polytechnic University of Madrid (Spain).

The marine mattresses were locally manufactured and installed, based on standard industry dimensions, equipment and installation methods. They feature a nature-inclusive design for cable protection which incorporates ECOncrete’s patented technology. This includes a bio-enhancing concrete admixture, and a three-dimensional complex surface optimised to create macro and micro habitats and enable the settlement and growth of marine flora and fauna. Their design creates various niche areas where fish can spawn, shelter, or feed, and features surfaces that encourage algae growth. As a result, the marine mattresses support the establishment of marine communities that thrive in more natural environments, enhancing the surrounding marine food web. These ecological benefits provide opportunities for nature that would otherwise be absent in traditional, heavily engineered cable protection technologies.

At the same time, by increasing the variety of available niches and promoting the growth of local species, marine mattresses can reduce the prevalence of invasive and opportunistic species.

Ecological monitoring is ongoing. Marine mattresses have the potential to deliver significant benefits to the offshore wind supply chain by providing validated, ecologically-engineered technology which support marine biodiversity within offshore wind and grid infrastructure while adhering to engineering and offshore installation standards, regulatory environmental requirements, and relevant permitting processes.

ECOncrete NID Marine Mattresses are currently manufactured at scale for deployment in future offshore wind projects.