Atlantic Array

Atlantic Array
Name	Atlantic Array
Location	Bristol Channel, Atlantic Ocean
Status	Cancelled
Owner	RWE npower Renewables; originally by RWE and E.ON
Planned capacity	~1,200 MW
Planned turbines	up to 240
Planned start	2013 (proposed)
Planned commission	cancelled 2013

Atlantic Array The Atlantic Array was a proposed large-scale offshore wind farm project planned for the Bristol Channel off the coasts of South Wales and South West England. It was promoted by major European energy companies and featured in policy debates involving Department of Energy and Climate Change planning, Crown Estate leasing, and environmental assessment processes led by agencies such as the Joint Nature Conservation Committee. The proposal catalysed discussions among stakeholders including regional authorities like Pembrokeshire County Council, utilities such as RWE and E.ON, and conservation organisations like RSPB and WWF.

Overview

The proposal envisaged a utility-scale array sited within waters administered following Marine and Coastal Access Act 2009 frameworks and subject to marine spatial planning linked to European Union initiatives on renewable energy targets. The scheme entered strategic appraisal stages overseen by bodies including the Planning Inspectorate and the Environment Agency and was referenced in energy policy documents influenced by commitments under the Energy Act 2008. Public consultation involved stakeholders from the National Trust, regional ports such as Swansea Docks, and academic institutions including Cardiff University.

Project History and Planning

Early project development involved licensing arrangements with the Crown Estate under rounds of offshore leasing that followed precedents set by projects like Hornsea Wind Farm and Thanet Wind Farm. Initial feasibility work involved developers RWE npower Renewables and E.ON UK who engaged maritime consultancies and engineering firms with experience from Walney Wind Farm and London Array. Consultation stages included statutory bodies such as the Marine Management Organisation and environmental consultees including Natural England and Natural Resources Wales. Planning submissions referenced grid connection coordination with National Grid and relied on offshore consenting regimes informed by case law such as disputes reviewed by the High Court of Justice.

Design and Technical Specifications

Design studies considered turbine technologies developed by manufacturers like Vestas, Siemens Wind Power, and GE Renewable Energy and mirrored design decisions used in projects such as Greater Gabbard and Walney. Proposed layouts modelled arrays of up to around 240 turbines with combined capacity in the order of 1,200 megawatts and electrical infrastructure including high-voltage subsea export cables and offshore substations similar to systems used at Beatrice Wind Farm. Engineering analyses referenced UK technical standards and certification by bodies including Det Norske Veritas and Lloyd's Register. Investigations of metocean conditions used datasets from Met Office and hydrographic surveys coordinated with British Geological Survey.

Environmental and Regulatory Assessments

Environmental impact assessment work addressed potential effects on protected sites such as Cardigan Bay Special Area of Conservation and species protected under designations like EU Birds Directive and Habitats Directive, with particular attention to cetaceans including bottlenose dolphin populations and migratory birds monitored by organisations like BirdLife International. Assessments involved acoustic modelling informed by precedents from SEA (Strategic Environmental Assessment) processes and mitigation advice from agencies including the Joint Nature Conservation Committee and the Marine Management Organisation. Regulatory scrutiny considered marine licencing, seabed lease conditions from the Crown Estate, and requirements under the Environmental Impact Assessment Directive as implemented in UK law.

Construction, Cancellation, and Costs

Despite consenting work and preparatory surveys, the project was formally cancelled by developers citing escalating capital cost estimates and shifting financial conditions influenced by market factors including wholesale prices tracked by the Office of Gas and Electricity Markets and the evolving support mechanisms under Contracts for Difference policy. Cost considerations referenced turbine capital expenditure trends observed in projects like Dogger Bank Wind Farm and cashflow models used by investment actors including Macquarie Group and insurers such as Aviva Investors. Cancellation decisions were announced amid consultation outcomes involving local authorities such as Ceredigion County Council and stakeholders including fishing associations represented by Seafish.

Legacy and Impact on UK Offshore Wind Policy

Although not built, the project influenced subsequent offshore planning practice, contributing lessons applied in later projects such as Hornsea One and policy refinements in National Policy Statements on energy infrastructure. The cancellation fed into industry analyses undertaken by trade bodies like RenewableUK and fiscal reviews at Department for Business, Energy & Industrial Strategy, informing risk allocation in offshore transmission charging models and consenting pathways for future offshore wind developments. Environmental monitoring datasets and stakeholder engagement processes generated during early stages were reused in regional marine planning exercises conducted by Welsh Government and local enterprise partnerships like Swansea Bay City Region.

Category:Proposed wind farms in England Category:Proposed wind farms in Wales