Isle of Wight Management Scheme

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  • Created by: Fran99
  • Created on: 17-12-15 11:24

Seagrove Bay and Seaview

Seagrove Bay

  • Crumbling sea wall and unstable slope.
  • Chose to 'hold the line'.
  • Scheme cost just under £1 million and was completed in 2000.
  • New concrete sea wall, wiht 200m of rock revetment placed in front of the wall to dissipate wave energy.
  • Rock Gryones.
  • Land Drainage, significantly reduced mass movement of soft clay.


  • Scheme cost £4.7 million and was completed in 2004.
  • Consists of 550m stone faced conrete sea wall and rock revement. 
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Wheeler's Bay

  • Ageing sea wall, in danager of collapse which would reactivate landslides.
  • Property on the cliff was becoming unstable.
  • Scheme completed in 2000 costing £1.6 million.
  • Rock Revement - 15000 tones of Norwegian granite placed seawards.
  • Coastal slopes were regraded to make a shallower profile before installing land drainage.
  •  Lead to a recovery in property values.
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Monk's Bay

  • Cliff failure resulting froma combinatation of high energy destructive waves and high rainfall.
  • Scheme costed £1.4 million, however the value of property exceeded this.
  • The scheme was completed in1992 but sedimentation of the rock gryones has been a problem.
  • offshore breakwater has been put in.
  • 6 rock gryones and a rock revement to reinforce the exisiting sea wall using 25000 tonnes of Norwegian granite.
  • Beach nourishment using 40,000m^3 of sand and gravel, re-profiling the slope and installing land drainage.
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East of Freshwater

  • Where the A3055 passes over a chalk ridge at Afton Down it is now within 11m of the cliff edge.
  • Sea defences would be econonmically unjustified and environmentally unacceptable.
  • Stabilises the cliff top by anchoring the tope of the cliff face costing £750 000. 
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  • Coast protection and Slope Inprovement schem cost £6.2 million and was completed in 2004.
  • Included 500m rock revement, extension system of drainage pipes and syphon drains reducing surface and groundwater levels, reducing landslides.  
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Castle Cove

  • Existing wooden revetment were becoming progressively ineffective as the clay cliffs retreated.
  • Property value in excess of £10 million was increasingly at risk as coastal processes activated ancient landslides.
  • Land drainage was installed.
  • Stabilising the slopes with thousands of tones of chalk.
  • Rock revetment of Somersel limestone, aconrete walkway and a gabion wall.
  • Scheme costed £2.3 million and was completed in 1996. 
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Western Cliffs

  • High energy waves were removing chalk blocks which protectedan acient landslide complex upoon which houses had been built.
  • There was danger of landslides being reactivated.
  • 31.2 million of Carboniferous limestone was brought in to construct 1 700m long rock revetment along the base of the cliffs using blocks weighing 6-8 tones.
  • Limestone rock gryones were also constructed at 100m intervals at the base of the cliff. 
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