Secondary steel installation completed at 257 MW Arcadis Ost 1 OWF

Wednesday, November 2 2022

Wind Energy – Arcadis Ost 1

Parkwind and DEME Offshore have completed the secondary steel installation work at the 257 MW Arcadis Ost 1 offshore wind farm in Germany.

DEME Offshore successfully installed the 28 XXL monopiles last summer and now they are being prepared for the wind turbine generators, with work set to start next month.

Secondary steel includes boat landings, platforms and corrosion protection systems, and represents a total of 3,700 tonnes of steel and 30 km of electrical cables.

DEME is responsible for the EPCI scope for the foundations of Arcadis Ost 1. Due to challenging soil conditions, which means jack-up operations cannot be carried out in the area, DEME’s expert team engineered a floating installation methodology for the secondary steel structures deploying specialised, project-specific tools.

The huge 2,000-tonne, 110 m-long, TP-less foundations were installed by DEME’s newest DP3 vessel, Orion.

For this ground-breaking offshore wind farm, DEME Offshore selected Energomontaż-Północ Gdynia Poland (EPG) for the fabrication of all the secondary steel components and the transition piece of the offshore substation.

Mathieu Holvoet, Project Director DEME Offshore, says: “We are thrilled to see another project successfully being completed, allowing our client Parkwind to continue within the anticipated timeframe, which will soon see the turbines placed on top of our foundations. This project has been a real technical and engineering challenge given the unusual soil conditions, amongst other reasons. With this latest installation completed, we can demonstrate that we are masters of offshore foundation installation utilising jack-ups, but also with pioneering floating installation methods. DEME is always ready to take up a new challenge!”