Hornsea Project Two will consist of 165 wind turbine generators (WTGs). These WTGs are connected via inter array cables to an Offshore Substation (OSS) from which export cables lead to a Reactive Compensation Station (RCS) before reaching the landfall near to Horseshoe Point. The wind farm array will be located approximately 89km at its closest point from the Yorkshire coast, covering an area of approximately 462km2.
This Decommissioning Programme is being submitted to the Department of Business, Energy and Industrial Strategy (BEIS) for approval in accordance with Section 105 of the Energy Act 2004. Pursuant to the notice issued on behalf of the Secretary of State (SOS) for the Department of BEIS issued to Hornsea Project Two on 21st December 2018. This document will provide preliminary information on methods and approaches to decommissioning Hornsea Project Two’s offshore installations (as required by the Energy Act 2004).
1.1 Purpose of this document
The expected operational lifetime of the wind farm is at least 25 years, although this number may vary depending on specific conditions arising during operation. In the last 5 to 10 years of wind farm operation it will be decided whether repowering (replacing wind turbine generators and other infrastructure) will be pursued which could consequently postpone the decommissioning phase by up to 25 years. At the end of its lifetime, the wind farm will be decommissioned to restore the site as far back to its original conditions as far as reasonably practicable.
This Decommissioning Programme is prepared to discharge DCO, Schedule 1, Part 3 Requirement 10:
No part of the authorised development below the mean low water mark (as amended 2016) is to commence until a written decommissioning programme in compliance with any notice served upon the undertaker by the Secretary of State pursuant to section 105(2) of the 2004 Act has been submitted to the Secretary of State for approval in relation to that part. In accordance with this, the Hornsea Project Two Undertakers received notice under Section 105(2) of the Energy Act 2004 requiring a Decommissioning Programme to be prepared and approved before construction of the wind farm.
The wind farm will be decommissioned according to the lease conditions set out in The Crown Estate (TCE) lease. The Decommissioning Programme is informed and supported by the Environmental Statement (SMart Wind, 2015). The document may be subject to review and amendment throughout the lifecycle of the project to reflect changing circumstances and regulatory requirements, and to incorporate improvements in knowledge and understanding of the marine environment and advancements in technology and working practice. Cost and financial security information is confidential and therefore not included in Decommissioning Programme documents. Cost and financial security information is provided separately to BEIS.