Transparency data

Summary of Hinkley Point C: Application to vary the marine licence ref L/2013/00178/6

Published 12 February 2021

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Case Details

In 2013 Hinkley Point C Nuclear Power Station was granted a Development Consent Order (DCO) by the Secretary of State for Department of Energy and Climate Change. Subsequently, the Marine Management Organisation (MMO) granted a marine licence (ref L/2013/00178/6) on 7 June 2013 for activities within the DCO for which the MMO are the regulatory and enforcement body. These are those activities which fall below Mean High Water Springs.

Between 2013 and 2020 there have been five variations to this marine licence. On 11 December 2020, MMO received a new variation request from the licence holder ‘EDF Energy PLC’. This request seeks to vary the construction methodology of activities below MHWS following confirmation of the detailed design. This includes;

  • maintenance dredge volumes at the intake and outfall locations located approximately 1km-3km from HPC in Bridgewater Bay to be increased to 185,000m3;
  • drilling of vertical shafts methodology updated;
  • disposal of drill arisings methodology updated;
  • installation of offshore intake/outfall heads methodology updated
  • the inclusion of new temporary structures to support the construction of the cooling water infrastructure, including Handling Alignment Frames and Jack up Vessels; and
  • an option for dredged material to be disposed of at the existing Portishead disposal site in the Bristol Channel
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