Windfarm jacket foundations load out complete

This is ST3 Offshore's second contract realised for the Danish energy giant Ørsted This is ST3 Offshore's second contract realised for the Danish energy giant Ørsted

Poland’s ST3 Offshore has successfully loaded two out of three windfarm jacket foundations onto a barge ready to be transported on to their next stage of construction.

This is the second contract realised for the Danish energy giant Ørsted’s offshore windfarm Borkum Riffgrund 2 in the North Sea.

“The load out proceeding is a difficult venture, both as an operational and as a logistic process,” said Adam Kowalski, the Vice-president of the Management Board of ST3 Offshore.

“The huge 120m gantry crane, which is used by the operations, is our great advantage, but in the same time it forces us to be extremely careful and to adjust works to weather requirements.”

Windfarm contract

ST3 Offshore’s full scope of works for Ørsted includes the fabrication of 20 constructions and the complete jacket assembly with electrical equipment.

The current load out started on 14 of February, with the placing of each taking around two days. The placing of the final jacket is imminent.

Following the final placing, the foundations will be transported on barges chartered from Norway to Cuxhaven, where they will be assembled with 10m high buckets (or caissons) to make them 60m high.

Then in February, the next three jackets will be allowed to transport.

The Borkum Riffgrund 2 windfarm will be located approximately 34 km North of the island Borkum in Germany, 54km off the coast of Lower Saxony, next to Borkum Riffgrund 1.

It has a target power generation capacity of 450 MW using turbines mounted on a total of 56 steel foundations where 20 foundations are jackets and the remaining 36 foundations are monopiles.

When completed, it will feature the largest wind turbines in German waters: 56 MHI Vestas 8 MW wind turbines with rotor spans of 164 metres.

By Anne-Marie Causer

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