BOWind has awarded the survey inspection and remedial works contract for the Barrow Offshore Wind Farm export cable to subsea cable specialists, Offshore Marine Management (OMM). OMM has also been awarded the cable surveys contract for Burbo Bank by developer DONG Energy.
The Barrow work will include the subsea inspection of the entire 27km export cable from Heysham to the wind farm site as well as any remedial operations involving jetting, diving and mattressing that might be required. The Burbo Bank work will include the subsea inspection of the three 8.6km export cables from the wind farm to Wallasey, Liverpool and the 500m of inter array cable.
The above work began early May and is scheduled for completion by the end of June 2010.
Both locations offer OMM a challenging environment with strong tides and currents as well as often difficult and variable local weather systems. Barrow has encountered water depths of drying heights through to 30m and Burbo Bank of drying heights to 5m. OMM will provide both BOWind and DONG Energy with sophisticated and proven shallow water solutions.
The subsea survey and inspection operations will be performed from the MCS Ailsa jumbo multicat using a seabed crawler system fitted with a suite of subsea equipment and sensors. The Vos Satisfaction (DP1 and four point mooring) will be utilised for the Barrow remedial works with the Willendeavour multicat as an anchor handling vessel. The flexibility of multicats is particularly important to this project due to the shallow water location, away from the channel and Lune Deep, at Heysham and Morecambe Flats, and also across the location at Burbo Bank and Wallasey landing approaches.
OMM will provide its own survey and cable teams, equipment and software throughout and will subcontract Seatrench AS for the jetting operations and Osiris Marine Services for the diving aspects of the remedial works.
Rob Grimmond, Managing Director of OMM said that this award confirms BOWind and DONG Energy's confidence in OMM's shallow water subsea cable and survey solutions for the renewable sector.
"It provides us with a further platform to progress our hi-tech and quality services to an expanding client base and we look forward to working with BOWind and DONG Energy on this demanding project."