Environment Agency raises Severn Barrage concerns

28 February 2013
By Edward Gent
Mobile version
Share |
A computer generated image of Hafren Power's proposals for a Severn Barrage

A computer generated image of Hafren Power's proposals for a Severn Barrage

Environment agency representatives have raised concerns about the ecological impact of a Severn Barrage.

The Energy and Climate Change Select Committee held an evidence session in Westminister this morning to investigate proposals for an 11 mile tidal power station across the Severn Estuary, submitted by Hafren Power last December.

But representatives for the Environment Agency giving evidence raised concerns about the impact on flooding and also on fish species reliant on the Severn.

In their submission to the committee Haffren Power claimed the barrage will defend an estimated 50,000 hectares of land from flooding and protect 90,000 existing properties for at least 120 years.

But Ed Mitchell's, director of environment and business, said the Environment Agency already has a £1 billion plan in place for the next 100 years and the added benefits of the barrage were unclear.

“The barrage across the Severn has potentially big positive and negative impacts on flood defences. It might provide additional defence for instance against storm surges but it may prove difficult in terms of flood risk higher upstream than the barrage,” he said.

“In broad terms we think it is probably sort of cost neutral in terms of flood defences.”

The primary concern for the Environment Agency is the predicted constriction of the tidal range caused by the barrage.

Richard Creswell, Director for the South West of England, said: “If you constrain the tide from between 0m and 14m to 3m and 12m then the tidal action is acting on the coast line in a much narrower band, so we would therefore want to look to see if it would erode the defences quicker than it does now.”

The fate of local fish species was also a concern for the agency with five species potentially under threat including salmon, lamprey and the migratory shad, which has only four breeding grounds in the UK three of which could be upstream of the barrage.

With the turbines Haffren proposes to use in the barrage spinning at 9m/s at the tips, there are serious concerns about the danger of significant numbers of fish being killed as migratory species such as salmon can spend up to four months in the estuary.

Mike Evans, from Environment Agency Wales, said most studies to date have demonstrated high fish mortality rates of up to three per cent and to make the proposal feasible in the eyes of animal protection legislation the figure would have to be reduced to under one per cent.

“We are looking at a quantum shift in mortality rates,” he said. “It’s a very, very big challenge.”

But speaking before a previous evidence hearing in January Tony Pryor, Hafren Power’s chief executive, said he was confident of the plans.

He said: “We will deliver green, safe, secure and ultimately the cheapest electricity for Britain into the next century. The barrage will create 20,000 construction jobs and protect tens of thousands of properties from rising sea levels and storm surges.

“We believe this is a project whose time has come but it will not be at the expense of upstream port jobs, fish or birds. We are committed to working with everyone in the months and years ahead to show how new technology and planning can mitigate risks. We are determined to get it right.”

Latest Issue

E&T cover image 1607

"As the dust settles after the referendum result, we consider what happens next. We also look forward to an international summer of sport."

E&T jobs

  • Chair in Integrated Sensor Technology

    The University of Edinburgh
    • Edinburgh, City of Edinburgh

    The University of Edinburgh is one of the world’s top 20 institutions of higher education.....

    • Recruiter: The University of Edinburgh

    Apply for this job

  • Principal Electrical Engineer - Power

    BAE Systems
    • Bristol, England / Cumbria, Barrow-In-Furness, England
    • Negotiable

    Principal Electrical Engineer - Power Join our Electrical Power team and help design the self-contained generation and distribution system for the Successor submarine - a new generation of submarine designed to carry the UK's independent nuclear deterrent

    • Recruiter: BAE Systems

    Apply for this job

  • Operations Supervisor (Mechanical/Electrical/Instrumentation)

    National Grid
    • England, Cambridgeshire
    • £33000 - £39000 per annum

    Operations Supervisor - (Mechanical/Electrical/Instrumentation) Salary: Circa £33k - 39k dependant on experience + vehicle and great additional benefits (share scheme, pension, potential bonus).Location: Wisbech - Cambridgeshire We currently have an excit

    • Recruiter: National Grid

    Apply for this job

  • Lead NDT Trainer

    BAE Systems
    • England, Lancashire
    • Competitive package

    Would you like to be involved with training UK and international teams in Non Destructive Inspection (NDI) to support the in service fleet (Typhoon Tornado, and Hawk)?

    • Recruiter: BAE Systems

    Apply for this job

  • Systems Design - Emerging Portfolio

    MBDA
    • Bristol
    • Competitive Salary & Benefits

    What?s the opportunity?   There are fantastic opportunities in Systems Design for engineers to work within Future Systems. These are highly visible, fast paced roles, in...

    • Recruiter: MBDA

    Apply for this job

  • Metering Engineer

    Department for Business, Innovation and Skills
    • Teddington, United Kingdom
    • £24,109 - £27,961 plus EO Electronics PE of £8,090.00

    We are now looking for a Metering Engineer to deliver RD’s In-Service Testing (IST) scheme for gas and electricity meters.

    • Recruiter: Department for Business, Innovation and Skills

    Apply for this job

  • Head of Operational Estates

    Premium job

    The Shrewsbury and Telford Hospital NHS Trust
    • Shrewsbury, Shropshire
    • £46,625 to £57,640 per annum

    As an experienced Estates Manager, you will play a key role in helping to shape the future of the Estates service.

    • Recruiter: The Shrewsbury and Telford Hospital NHS Trust

    Apply for this job

  • Engineering Project Manager - Electrical & Automation

    Nestle
    • York, North Yorkshire
    • c£45,000 + Car Allowance + Bonus + Excellent Benefits

    Nestlé Product Technology Centre in York currently has an excellent opportunity for an Engineering Project Manager

    • Recruiter: Nestle

    Apply for this job

  • Assistant Professor (Tenure Track) of Smart Building Solutions

    Premium job

    ETH Zurich
    • Zurich, Canton of Zürich (CH)

    The successful candidate is expected to develop a strong and visible research programme in the area of control and diagnostics of building systems

    • Recruiter: ETH Zurich

    Apply for this job

  • Process Controls Leader

    Premium job

    Phillips 66
    • Humber Refinery, South Killingholme, North Lincolnshire DN40 3DW
    • £60k - 75k plus extensive Compensation and benefits package, dependent upon experience

    Experienced Process Control Leader providing leadership and technical support for Oil Refinery. Extensive Compensation and benefits package.

    • Recruiter: Phillips 66

    Apply for this job

More jobs ▶

Subscribe

Choose the way you would like to access the latest news and developments in your field.

Subscribe to E&T