Borkum Riffgrund 2 Offshore Wind Farm

25 Feb 2022: Ørsted Wind Power A/S is undertaking Structural Inspection Below Water (SIBW) on annual basis and repairs on demand on  Borkum Riffgrund 02. The Services comprises the following: General visual inspection ▪ Transition piece (TP) ▪ Monopile ▪ Jacket structures ▪ Support structures, including appurtenances Close visual inspections of cable protection and route system Performed on each cable route, with the following criterion: • Cable positioning in cable protection system • Cable exposure including inspection of cable protection system • Horizontal and/or vertical cable free span from cable exit in cable protection system to seabed. Anode cage design (only) ▪ Cleaning, check and maintenance of critical connections Marine growth inspection ▪ Thickness readings covering soft and hard marine growth measurements taken from pre-determined cardinal points vertically and circumferentially. Cathodic protection system (CPS) readings ▪ Cleaning of selected anodes to estimate anode depletion. ▪ Potential contact readings taken externally on the jacket/transmission piece (TP) and monopile (MP) at pre-determined points both vertically and circumferentially Note: It is only expected that the Supplier cleans as much as is required to get a reliable anode depletion estimate or a minimum of 1m linear meter of each face. Grouted connection designs (only) ▪ Close visual inspection of grout seal ▪ Cleaning (if needed) of grout seal followed by a close visual inspection Cleaning of surface is requested for e.g. for close visual inspections as well as removal of ropes, etc. entangled at ladder of foundation. Removal of debris Repairs Repair of CPS and second steel structures e.g. bolted connections to be done on demand. Diving (scratch samples) Investigation of growth and demersal megafauna on underwater structures: Recovery of lost objects Investigations R&D projects
Fully Commissioned
450 MW
4C Offshore | Location Map: Lat(53.952) Lon(6.487)

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Power & Turbines
Windfarm Capacity
450 MW
Turbine Model
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Other Turbine(s) Used
Min. Turbine Capacity (MW)
Max. Turbine Capacity (MW)
Min. Number of Turbines
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Total Turbine Height
Hub Height
Rotor Diameter
Foundation Type
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Foundations on Wind Farm
Foundation Comments

Location & Environment
Sea Name
North Sea
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Depth Range (Chart Datum)
Depth Range (Stated by Developer)
Distance from Shore (Developer)
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Distance from Shore (Computed)

Installation Base
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Ops and Maintenance
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Number of Offshore Platform(s)
Shared Platform Type
Grid Connection Point
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Cable Landing Point

Export Cables (AC & DC)
Number of Export Cables (AC)
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Average Length per Cable (AC)
Additional Requirements (AC)
Nominal Voltage (AC)
Number of Export Cables (DC)
Average Length per Cable (DC)
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Additional Requirements (DC)
Nominal Voltage (DC)

Nominal Voltage

Onshore Cables
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Average Length per Cable
Expected Life