Salix were brought in to help with a sensitive erosion problem on a reservoir shoreline in North London. Ecologically sensitive solutions were used which will create habitats and improve amenity value.
Salix were brought in to help with a sensitive erosion problem on a reservoir spillway in North London.
The reservoir, which has a crest length of around 2,670 m is impounded behind an earth fill embankment dam which has a puddle clay core at its centre.
Over much of the inner embankment face, the inner face is initially grassed and slopes at around 1v on 4h between the dam crest and the coping to the curved concrete wave wall. Below the concrete wave wall the embankment face slopes at around 1v 4h and is protected by a combination of concrete slabbing and concrete slabbing overlain with Open Stone Asphalt.
A combination of Rock Mattresses and VMax C350 were used to create a strong revetment whilst providing habitats for wildlife.
Embankment protection was required together with crest road enhancement.
Along the western side of the reservoir over 700m of the internal face of the embankment is unprotected and was suffering from wind wave erosion along its length.
The erosion had formed a noticeable notch at around top water level with a series of inlets and shallow beaches in a number of locations.
The solution chosen was to reprofile the inner face along this length of the embankment and then protect the surface by the placement of ready filled Rock Mattresses with Vmax C350 installed above.
We used HydraCX for the first time on a Network Rail project in Chipping Campden. We wanted to establish vegetation growth as quickly as possible on a slope with poor ground conditions without the need for importing topsoil due to possession time constraints. HydraCX provided an excellent growing medium for rapid germination.Carillion Rail
Your staff are always friendly, knowledgeable and helpful and we have always been pleased with the service and the quality of the wetland plants and planting services. Technical knowledge on erosion control is also excellent. Keep up the good work!Living Water Ecosystems Ltd
We have worked with Salix on a number of projects throughout East Anglia over the last 6 years, and we have always found them to be highly professional and competent. We have used their services as suppliers of quality wetland plants, with a traceable provenance, and as contractors to both supply and plant the wetland plants. In addition we have always relied on the technical advice and knowledge of David Holland, in particular, to help answer queries from our clients regarding wetland planting schemes we have been involved in, this is an added value part of their service, for which we are grateful.UPM Tilhill
Excellent overall performance – very approachable and offered a good sustainable solutions to rectify a significant erosion scour to the river foreshore without comprising the existing flood defence. Carried out work to agreed timescale and budget. Certainly would value their future input.Environment Agency, Leeds
HydraCX gave an immediate impression the embankment was grassed, making it more visually pleasing to our travelling customers. The rapidity of grass growth was exceptional and it added additional strength to the slope surface.Network Rail
We invited Salix to re-landscape the watercourse through a design and build project. The works to the watercourse were completed within two weeks of starting on site and, despite a number of prolonged heavy rain events both during and after the works, the pre-established coir rolls and pallets all began putting on new growth within a matter of days providing the watercourse with instant channel vegetation and protection to the toe of the banks. The VMax reinforcement used to stabilise the slopes has also prevented any erosion to the sandy soil beneath and has allowed the rapid establishment of grass which wouldn’t have otherwise been possible.South Ribble Council
Atkins has worked with Salix on a number of projects, collaborating on design concept, trialling and implementation. We have found their experience valuable in delivering cost effective and environmentally functional solutions.Atkins