The PL5 Decommissioning Programme has now been approved by the UK regulator BEIS-OPRED to decommission the 34 km Dunlin Alpha to Cormorant Alpha PL5 pipeline and its associated infrastructure.
The decommissioning plans are for the surface laid ends of the pipeline to be cut and removed for recycling, leaving the remaining pipeline largely trenched below the seabed. To protect against potential snagging hazards, rock will be applied to cover the cut locations of the exposed pipeline ends and any identified areas of spanning. Partially-buried concrete mattresses will be removed, together with the anode skids and pipeline connection spools. Buried grout bags and mattresses that continue to provide pipeline stability and protect against movement and spans will remain in place and rock cover applied where needed to prevent snagging hazards. Any oilfield debris adjacent to the pipeline will be recovered and a seabed clearance survey conducted. The survey results will be used as the basis for developing a monitoring regime for the decommissioned pipeline with the regulator and its consultees.
- Dunlin Alpha to Cormorant Alpha Pipeline (PL5) Final Decommissioning Programme - Approved
- Dunlin Alpha to Cormorant Alpha Pipeline (PL5) Decommissioning Comparative Assessment Report
- Dunlin Alpha to Cormorant Alpha Pipeline (PL5) Decommissioning Environmental Appraisal Report
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