Danish grid operator Energinet has issued a tender for an unexploded ordnance (UXO) Box survey for one of three planned offshore wind projects.
In April 2020 Energinet will undertake the initial geophysical and geotechnical investigations prior to the procurement of a developer for the up to 1GW Thor offshore wind farm in the North Sea, west of Nissum Fjord.
To minimise the UXO risk of the investigations, Energinet is requesting a UXO Box survey, which will be performed in approximately 100 rectangular zones.
Each zone will spanning 200 metres by 150 metres or 100 metres by 50 metres.
The UXO Box survey will include the geophysical survey methods, based on magnetometers, side scan sonar and multi-beam echo-sounding.
The provider of the UXO Box survey will also need to supply offshore data processing, target interpretation and reporting as part of the work.
The contract’s key deliverables include a fast-track data package, an operational survey report, and an interpretative survey report.
The contract will last three months and interested parties have until midday local time on 9 September to apply.
As part of the Energy Agreement of 2018, Danish political parties agreed to build three new offshore wind farms before 2030.
In February 2019, the parties to the Energy Agreement decided that the first of the three offshore wind farms should be built in the North Sea, west of Nissum Fjord, at least 20km from the shore of Jutland, dubbed ‘Thor’.
As part of the Energy Agreement 2018 new Danish offshore wind tenders will also include the offshore substation and the grid connection from the wind farm to the onshore point of connection, which Energinet has previously been responsible for constructing and operating, financing the cost over the tariffs.
Pre-investigations of the selected site for Thor and the other two wind farm sites will be carried out prior to deadline for bids in order to minimise risk for developers.