Client: MeyGen Limited


In 2010, as part of the Pentland Firth and Orkney Waters leasing round, The Crown Estate awarded an agreement for lease (AfL) to MeyGen Limited, granting the option to develop a tidal stream project of up to 398 MW at an offshore site between Scotland’s northernmost coast and the island of Stroma. The 3.5km2 site covers some of the fastest flowing waters in the UK, just 2km from Scotland’s north-east tip. This site was originally identified by Atlantis in 2007, following a global review of tidal resource which concluded that the high flows, medium water depths and proximity to the mainland rendered it a prime location for development. The MeyGen project is currently the largest planned tidal stream project in the world, and is the only commercial multi-turbine array to have commenced construction.

Xodus was appointed EIA Coordinator for the 86 MW Phase 1 project in 2011. This was the beginning of a strong working relationship with the MeyGen project development team, which is still ongoing. During our time supporting the MeyGen project Xodus has:

• Successfully consented Phase 1 of the project
• Support to the project development team, including project management and risk identification and management
• Assisted in the discharge of consent conditions and provision of Ecological Clerk of Works role for Phase 1a
• Assistance in the justification for deployment of Phase 1b

The detailed scope of all work completed is presented below.

  • EIA Co-Ordinator (onshore and offshore), subcontractor appointment and management and ES and HRA preparation for the MeyGen Phase 1 (86 MW)
  • Definition of the Rochdale (Design) Envelope for the EIA
  • Consultation and agreement on EIA study scopes with the regulator and other key stakeholders
  • Benthic survey scope, procurement and management
  • In house Xodus EIA studies: physical environment & sediment dynamics; benthic habitats and ecology; marine mammals; fish ecology; commercial fisheries; terrestrial habitats and ecology; onshore transportation and access; onshore noise and dust; accidental events
  • Development (alongside subcontractors and the regulator and their advisors) of collision risk modelling to predict potential impacts on marine mammals
  • Fish collision risk modelling to support fish ecology impact assessment
  • Regulator, statutory advisor and other stakeholder and public consultation
  • Preparation of planning applications and Marine License application
  • Discharge of consent conditions, including Ecological Clerk of Works (ECoW)
  • Construction method statement, operational management plan (OMP), project environmental monitoring plan (PEMP) and construction environment management plan (CEMP)
  • Cable stability study
  • Project management support including risk register and analysis
  • Personnel secondment into project development team
  • Justification to allow deployment of Phase 1b under Condition 2 of the s36 consent
  • Geographical Information System (GIS) support
Value Added
  • Integrated multidisciplinary support to the project development and consenting process
  • Continuity of support for over 5 years, for a small and evolving tidal technology development company
  • Technology neutral approach to the EIA to allow flexibility in the tidal turbine technology deployed
  • Incorporation of local content in the delivery of the EIA through use of local subcontractors wherever possible
  • Development of novel approach to prediction of impacts on marine wildlife, the first time for a tidal array