Jack's Keys needed a rapid response to scour and erosion problems. Our pre-filled Rock Mattresses and Rock Rolls were the answer, our Menzi Muck Spider machine was able to climb in and place them in the river bed.
Preventing erosion in a new river channel on a sensitive site
The Environment Agency have decommissioned two reservoir dams at Jack’s Key and created an engineered channel between them that feeds into the River Darwen.
The channel is spilt into 3 sections. The middle section was being heavily scoured by winter flows, which was a concern as further downstream there was a sensitive flood risk situation.
The Environment Agency asked Salix for an alternative to Reno mattresses that would be robust, easier to green up and environmentally sensitive. They required a long term solution to prevent erosion but also create opportunities for wildlife
Our pre-filled Rock Rolls and Rock Mattresses were used in the river bed, these have been shown to be highly effective in the most testing of environments whilst also providing opportunities for invertebrates and other wildlife. These will rapidly naturalise and allow vegetation to establish whilst being excellent at preventing scour.
Lindsay Ward from the Environment Agency said
Salix were very helpful from our initial enquiry through to the construction works. From a quick phone discussion and emailing some photos through we received some very good design options and sketches within a couple of days. Following a site meeting we confirmed our preferred option and received a quote very quickly afterwards.
Salix were easy to deal with and met our tight timescales throughout. The works were carried out safely and effectively on site, to programme, working well with our principal contractor. Their advice and design was very good and the constructed Rock Rolls are performing well on site.
Ian Bolt of VBA said
The 2 Salix representatives we had at Jacks Key were Rhodri Henry & Jason Alford. They were both a credit to Salix, worked meticulously in difficult conditions and nothing was too much trouble. Any issues were addressed immediately with a minimum of fuss.
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
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
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
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
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
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