Report 603
Identifying the possible impacts of rock dump from oil and gas decommissioning on Annex I mobile sandbanks
(2017)
Pidduck, E., Jones, R., Daglish, P., Farley, A., Morley, N., Page, A. & Soubies, H.
The aim of this report is to provide evidence of the impacts associated with rock dumping during the decommissioning of oil and gas infrastructure on mobile Annex I sandbanks which are slightly covered by seawater all the time.
 

Introduction

 

This project was commissioned to provide an improved understanding of the impacts of rock dump from oil and gas decommissioning on Annex I mobile sandbanks, using the North Norfolk Sandbanks and Saturn Reef (NNSSR) candidate Special Area of Conservation (cSAC)/Site of Community Importance (SCI) as a case study. This work aimed to provide an evidence base to support management advice for similar Marine Protected Areas, identify evidence gaps where appropriate and the areas of future work that could be undertaken.

Over the next three decades, the UK will be subject to a significant decommissioning programme of oil and gas (O&G) infrastructure, with over 800 platforms and wells requiring removal or burial. Where the infrastructure cannot be removed (such as pipelines), protection by rock dump has previously been used to stabilise and remove the risk of snagging by fishing vessels operating trawl nets once the infrastructure is decommissioned. Rock dump is also used as a means of stabilising rigs and jack-up barges used during decommissioning operations. The impacts of decommissioning on Marine Protected Areas designated under the Habitats Directive (92/43/EEC) have the potential to affect the sites conservation objectives and integrity. This report is a review of existing literature, publicly available data, and a qualitative evaluation of the impacts of rock dump on Annex I habitats in the NNSSR cSAC/SCI.

 
Download 

 

You will need the free Adobe Acrobat Reader to view this document.
 
ISSN 0963-8901
 
Please cite as: Pidduck, E., Jones, R., Daglish, P., Farley, A., Morley, N., Page, A. & Soubies, H., (2017), Identifying the possible impacts of rock dump from oil and gas decommissioning on Annex I mobile sandbanks, JNCC Report 603, ISSN 0963-8901