Existing Barrages with Roads and Electricity Generation

La Rance Tidal Power Station, France

Photo: Yves Jalabert (CC BY-SA 2.0)
  • Opened in 1966
  • 0.75km in length
  • Generates 523,000MWh per annum (as of 2010)

The Sihwa Embankment, South Korea
– enclosing a man-made coastal lake 

  • Opened in 2011
  • 12.7km in length
  • Generates 553,000MWh per annum (as of 2016)

Strategic Outline Business Case

Morecambe Bay and Duddon Estuary Barrages:

Travel Routes:

  • Heysham – Rampside: 17km
  • Askam-in-Furness – Haverigg: 6km
  • New/updated routes from the M6 to Heysham, Rampside to Askham-in-Furness and Haverigg to the A595

Energy Production:

  • *Between 7 million and 8 million MWh per annum
  • *2 million homes supplied
  • *2% of UK requirement or 7% of NW requirement
Construction Cost Estimates
(excluding finance)
Estimated CostsContingencyPer Mott MacDonald
Total£8,410.0021%£10,193.00
£m%£m
Green electricity generation£7,270.0020%£8,724.00
Causeway£1,140.0029%£1,469.00
Development cost estimates
(excluding finance)
Timescale Current Estimates
Corporate costs12£0.57
Months£m
Development phase66£99.50