Amenity Water Management Ltd

Dredging and Revetments
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Restoration of an Eroded River Channel
Dredging Half a Moat Using Portadams
Gabion Stone Revetment with Bio-Engineering on Chalk Spring Brook
Creating Sand Martin and Kingfisher Nesting Habitat
River Habitat Improvement at Blenheim Palace
Oak dipping platform for school children
Piling for a boathouse and jetty on the Thames
Dredging a lake
Re-lining a large pond
Retaining topsoil on steep slopes
'Green' Steel Sheet Piling on the Thames
Restoring Islands in an Urban Lake
Geotextile soft revetments for eroded banks
Water Quality Improvement - Weed and Algae Management
Design and Construction
Dredging and Revetments

Dredging

Dredging to remove accumulated sediment is carried out using land based or floating plant and by either mechanical excavtion or hydraulic suction depending on the conditions.

Brilliant old Hi Mac Digger
A now retired HyMac excavator

Partial and complete dredging campaigns to remove accumulated sedimentation are often combined with the creation of new reveted wetland areas using the sediment. Although reducing the size of the lake or pond there is a considerable saving to be made by not transporting the silt off site.

For most dredging works long-reach tracked excavators provide the most cost effective method dredging in either wet or drained conditions.
 
Where this is not possible however floating plant is used. The floating plant will load the silt into barges for transport to the shore unless suction dredging is being carried out when it will be piped ashore.
 

For Further information contact us:
(0044) 0 1483 890666
 

Revetments

edgeware-revetment2.jpg
Reinforced fill with rock roll facing

Revetment works are carried out to embankments and aquatic margins to protect and retain them from erosion. Revetment packages are described as hard using materials such as steel and concrete or soft using indigenous plants and materials such as jute and coir.
 

Amersham Volta Cell Revetment
Volta Cell to hold topsoil on steep chalk slope

AWM offers a wide range of revetment packages to suit the varied requirements of our customers and the environment.
Where possible and practical we always aim to use bio-engineering incorporating indigenous plants into the design for improved aesthetics and longevity.
Hard Revetment Types include:
o Steel sheet piles typically for marinas, moorings and retaining high banks.
o Concrete block systems for heavy traffic use of a shoreline, fast flows or heavy wave action.
o Wooden structures such as cam sheeting or sleepers for more formal environments such as parks.

Soft Revetment Types include:
o The use of indigenous marginal plants to stabilise a bank and prevent erosion. These are often  pre-grown in coir rolls of various sizes or flat pallets to provide an instant green solution.
o Reinforced earth wrapped in geotextile to enable a steeper slope finish.
Geotextile fencing: man made woven fabric to retain solids such as silt in creating wetland areas.
o Bundles of sticks ( faggot bundles) to retain eroding banks, often used with pre planted coir rolls above.

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Hullbrook Farm Hullbrook Lane Shamley Green Surrey GU5 0TF. +44(0)1483 890666