Isca Road Flood Alleviation & Ebbw Slip

Ebbw Slip

• The works involves the protection of 200m of the riverbank, which had slipped and was in danger of breaching the flood defence embankment.
• Prior to commencing the river bank works a 100m length of the flood defence embankment was realigned away from the riverbank. A 2m high block-stone wall was constructed as a retaining structure, to support the embankment adjacent to a reen
• All works were completed 3 weeks ahead of programme and within target cost.
• The access road went through a SSSI and crossed several watercourses, mitigation measures such as silt fences were constructed to prevent silt run off.

ISCA Road

• A tidal area of the river Usk where erosion was threatening the stability of housing and infrastructure.
• Re-grading and erosion protection to 800m of river bank. A 200m sheet piled flood defence wall and 300m of flood defence bund.
• The river bank was re-graded to a 1:3.5 slope and covered with geo-textile and rip-rap stone which was typically 150mm to 600mm stone from the bed level to the mean high water spring level. All work on the riverbank was dictated by the tides.

Making tomorrow a better place

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