Project Description
The Greatham Managed Realignment Scheme was part of the Environment Agency’s wider “Tees Tidal Flood Risk Management Strategy” which imposed a legal requirement upon the Environment Agency to deliver intertidal habitats as compensation for the impact(s) of flood management projects. The scheme essentially involved the raising, improving and remodelling of existing flood embankments and the construction of a new flood embankment along the West side of the A178.
The Challenge
The challenge for the overall scheme was to combine a flood defence strategy with habitat improvements. As part of this, the challenge for the works was to construct embankments 2.5m high and with 1 in 3.5 to 1 in 4 side slopes composed of predominantly site won material (from borrow pit).
The size, scale and nature of the works dictated that a tight time scale was maintained and that readily available high specification and high performance materials were utilised to ensure a rapid return to the previous natural state.
The Solution
The original design incorporated a biodegradable mat but it was decided that a permanent reinforcing product was required. ABG’s Erosamat Type 3 turf reinforcement mat was chosen by the consulting engineer. Comprising a three-dimensional structure of entangled filaments, the Erosamat erosion control geosynthetic was selected to form a permanent composite to support a robust sward of grass.
Erosamat Type 3 Erosion Control Matting
The ABG Service
ABG Provided full specification and design support to aid the approval process.
