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.