June 2007 – June 2008
Lynn and Inner Dowsing are two adjacent wind farms which are situated 5km off the Lincolnshire coast, east of Skegness. They are each 90 MW wind farms which together are expected to provide power to 130,000 local homes.
Each of the two wind farms consist of 27 turbines. Power from the turbines is transmitted ashore via three subsea buried cables per wind farm.
MPI Resolution was chartered to install the 54 foundations and turbines over a two-year period. During 2007 all the foundations and during 2008 all the turbines were installed, both wind farms are now operational.
The foundations were manufactured in Belgium and transported by barge down river to the port of Vlissingen. At the port, MPI Resolution loaded the monopiles and transition pieces from the transport barge utilising her at that time 300t crane. For the load out, MPI Resolution “jacked” clear of the water to aid crane operations. Five sets of foundation components were loaded per cycle, a total of eleven cycles were used to complete the foundation installation.
Onboard MPI Resolution, construction crews were provided to carry out all the installation activities associated with the foundations working round the clock for continuous offshore operations. To load the monopiles into the pile guide, the piles were “tailed” vertically by means of MPI Resolution’s crane and SPMT multi-axle low loaders. On occasions when the monopiles “refused” before being driven to final depth, drilling techniques were used to allow the pile to be driven to final depth.
During early 2008 installation of the turbines commenced for which a deck load plan for MPI Resolution was developed accommodating six complete turbine units. The 3.6MW turbines were supplied by Siemens Power Generation based in Denmark. Each turbine tower installed is approximately 80 metres above mean sea level and has a rotor diameter of 107 metres, giving a total height to blade tip of 134 metres.