Severn Estuary Tidal Energy 1.Call for Proposals 2.Initial Assessment of Options 3.Next Steps 19 September 2008 – Severn Estuary Partnership, Penarth Peter Kydd Director of Planning & Environment Parsons Brinckerhoff Severn Tidal Power Feasibility Study

Severn Estuary Tidal Energy PB BV Consortium Consortium led by Parsons Brinckerhoff appointed by BERR on 28 th April 2008 to undertake the Assessment of Options and Strategic Environment Assessment The consortium is jointly managed by Parsons Brinckerhoff (PB) and Black & Veatch (B&V) and includes over 10 different specialist engineering, cost and environmental consultancies.

Severn Estuary Tidal Energy Route Map – Assessment of Options Short-List of Potential Options SDC Report Call for Proposals Strategic Locations SEA Reasonable Alternatives Assessment Framework SEA Scoping & Early Research Long-List of Potential Options Fair Basis Estimation of Costs, Programme and Energy Yield Optimised Designs, Detailed Assessment of Costs, Programme and Energy Yield Public Consultation Preferred Option SEA Research, Consultation and Assessment Environmental Report and Appropriate Assessment SEA Scoping Report Call for Information

Severn Estuary Tidal Energy Route Map – Assessment of Options SDC Report Call for Proposals Strategic Locations Assessment Framework Long-List of Potential Options Fair Basis Estimation of Costs, Programme and Energy Yield

Severn Estuary Tidal Energy Potential Options RefOption Name B1Outer Barrage from Minehead to Aberthaw B2Middle Barrage from Hinkley to Lavernock Point (As B3 but lands at Hinkley) B3Middle Barrage from Brean Down to Lavernock Point (Cardiff to Weston Barrage) B4Inner Barrage (Shoots Barrage) B5Beachley Barrage F1Tidal Fence Proposal L2Lagoon Enclosure on the Welsh Grounds (Fleming Lagoon) L3General Tidal Lagoon Proposals R1Tidal Reef Proposal U1Severn Lake Scheme

Severn Estuary Tidal Energy Initial Options – Minehead to Aberthaw RefOption Name B1Outer Barrage – 25TWh per year (conventional Barrage) F1Tidal Fence Proposal – 3.5TWh per year (an array of tidal stream turbines proposed by Pulse Tidal)) R1Tidal Reef Proposal – 20TWh per year ( a new technology – Rotating turbine modules using 2 m head) – proposed by Evans Engineering

Severn Estuary Tidal Energy Initial Options – Cardiff to Weston (and variants) RefOption Name B3Lavernock Point to Brean Down – 17TWh per year (conventional Barrage) F1Tidal Fence Proposal – 3.5TWh per year (an array of tidal stream turbines) B2Variant of B3 that runs to Hinkley Point rather tha Brean Down (improved flood defence and grid connections) – proposed by Shawater U1Variant of B3 that employs a 1km wide causeway and adds land, leisure and wave energy developments – Severn Lakes proposal

Severn Estuary Tidal Energy Initial Options – Upper Estuary Options RefOption Name B4Shoots Barrage – 2.77TWh per year (conventional Barrage) B5Beachley Barrage – smaller than B4 but avoids blocking the Wye L2Welsh Grounds – 3TWh/a Tidal Impoundment proposed by Fleming Energy L3Tidal Lagoons – various onshore and offshore locations including options proposed by Tidal Electric extending throughout the estuary.

Severn Estuary Tidal Energy Initial Options – Combinations and Modes of Operation Potential Combinations Tidal Lagoons + Smaller Barrage Multiple Tidal Lagoons Tidal Fence + Smaller Barrage Others subject to further study Modes of Operation Ebb only Ebb and Flood Pump Assisted Multiple Basins

Severn Estuary Tidal Energy Fair Basis Cost and Energy Estimates Application of same principles to all options Costs Breaks each option down into a set of Principal Quantities Applies consistent rates to principal quantities across all options Energy Yield Applies a consistent energy yield methodology across all options Construction Programme Applies the same start date to each option and common assumptions on programme length Operations Common approach to operational costs, maintenance costs and “outage” assumptions.

Severn Estuary Tidal Energy Assessment Framework for Initial Options Initial Screen Technical Feasibility Quantitative Energy Outputs and CO2 savings Levelised Costs Qualitative Environmental Effects Social / Regional and Economic Effects Sensitivity Testing Iterative Approach Review and Updating of Options during assessment

Severn Estuary Tidal Energy Next Steps To confirm short-list of options: Continued dialogue with Proposers to confirm technical data Conclusion of technical analysis Application of Assessment Framework Submission of Conclusions for review by BERR Ministerial Review and Public Consultation on Proposed Short-List