SCHEDULE 9 Marine Licence 2: Project B Offshore Generation – Work Nos. 1B and 2T

PART 2 Conditions

Detailed offshore design parameters
6. (1) Wind turbine generator foundation structures must be of 1 or more of the following foundation options: monopole, multi-leg or gravity base.
(2) No wind turbine generator foundation structure employing a footing of driven piles may—
(a) have more than 6 driven piles;
(b) in the case of single-pile structures, have a pile diameter exceeding 12 metres or employ a hammer energy during installation exceeding 3,000 kilojoules;
(c) in the case of structures with 2 or more piles, have a pile diameter exceeding 3.5 metres or employ a hammer energy during installation exceeding 2,300 kilojoules.
(3) No wind turbine generator foundation may have—
(a) a main supporting structure exceeding 61 metres in width;
(b) a seabed footprint (excluding subsea scour protection) exceeding 2,376 square metres;
(c) a seabed footprint (including subsea scour protection) exceeding 5,675 square metres.
(4) The foundations for wind turbine generators must be in accordance with the wave reflection co-efficient values set out at Table 3.6 in Chapter 5, Appendix B (foundation characterisation study) of the environmental statement.