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The Problem:
A disused sluice on the Sharpness Canal was recently re-commissioned and modernised to release excess water into the adjacent Severn Estuary.
When the new sluice was first activated during the summer floods of 2007, the force of the discharge eroded the adjacent SSSI foreshore and exposed the original Victorian spillway.
In addition to deteriorating stonework from the original structure, saturation of the cliffing face resulted in bank collapse and the loss
of designated land following each tidal exchange. The rapid rate of bank retreat meant that the works had to be designed and implemented within a very tight time frame.
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The Solution:
Cain Bio-Engineering Ltd (CBE) was contracted as principle designer to repair and protect the Victorian spillway and surrounding environment.
CBE was then sub-contracted by British Waterways May Gurney to install the bio-engineering elements of the repair including a Coirnet terraced revetment and brushwood sediment trap.
A rock ramp attenuator was also installed at the Apron ‘toe’ to prevent further loss of material from the spillway.
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