We’ve talked before about how important the UK’s waterways are to construction , and The Rothen Group is dedicated to maintaining them to the best possible standard. Thanks to our diverse fleet of vessels, we are capable of undertaking a range of different marine engineering works to help achieve this. With over 2,000 miles of canals and rivers in the UK, 11,000 miles of coastline, and thousands of private and commercial marinas, plus lakes, ponds, reservoirs and wetlands, keeping canals and rivers clear of naturally deposited sediments is a critical part of canal maintenance, and the importance of dredging activity should not be underestimated. What does dredging mean? Dredging is defined as the removal of sediments and debris from the bottom of bodies of water, including rivers, canals, and lakes. It involves managing the effects of climate change through flood and drought, coastal erosion, and the pressure of increasing urbanisation. Sediment removal is necessary due to the natural process of sand and silt washing downstream and building up along key chokepoints, such as river banks. The type of work required can vary depending on whether operators are carrying out canal dredging or river dredging. The best way to categorise dredging is to split it into the two underlying reasons: economic and environmental. Below is more information on these two dredging examples: Maintenance dredging UK dredging is often focused on maintaining or increasing the depth of navigation channels, to allow safe passage of boats. This is because vessels require a certain amount of water to float, and a buildup of sediment will prevent a boat from being able to effectively navigate a waterway. The amount of heavy goods transported on canals and rivers makes them massively important to the UK’s economy, which is why maintenance dredging projects so crucial. Environmental dredging The sediments which are found in river channels and canals can be potentially harmful to wildlife and people, especially in and around cities or industrial areas. If pollutants are introduced into waterways, such as from sewer overflows, then sediments can become contaminated and present a danger to water-dwelling life. As well as minimising the risk of pollutants, removing sediment can have a positive impact on biodiversity by allowing more light to reach the water bed. This can encourage fish spawning grounds, and generally lead to a healthier waterway. How to dredge a canal The process of dredging a canal is more technical and precise than it may appear at first. Care must be taken to not damage the bed of the canal/ river as the excavator drags along the bottom. Often, canal beds are sealed with puddling clay to prevent leakage, which must remain intact for the canal to be functional. There can also be culverts and underground services to be taken into consideration. A rough step-by-step guide is as follows: Mobilise boats/kit to site Use a digger or crane to excavate material out. These usually have special clamshell grabs or buckets on designed to let some water pass through, but retain the majority of silt/deposits in the bucket. There are usually plans to indicate the water depths, or a bathymetric survey to highlight silt deposits Place silt into a hopper or crane barge Move to the discharge site Use a discharge machine, which can be a crane on a barge or a separate digger on the bank, to dig out silt from the hopper. This silt can be placed into lorries to be taken off site. Silt can be dried on land to be used as a natural fertiliser, providing it isn’t contaminated For challenging dredging operations, the best course of action is to engage with dredging contractors such as The Rothen Group, who can bring a wealth of experience to the project. Depending on availability, The Rothen Group can mobilise within 24-28 hours. This depends on a number of factors, such as location and complexity of the project, and a team of experts are always on-hand to help manage logistics and act quickly. Canal dredging equipment A ‘dredger’ can take many forms, with different sized kits for various situations, including different levels of access to sites, or varying dredging requirements. This includes: A long reach excavator (operating from the bank) A long reach excavator (operating from a boat) An excavator on a pontoon with jack legs A crane or grab barge with a clamshell bucket An amphibious digger Effectively, anything that is able to ‘scoop’ material from the water and move it elsewhere can be used for dredging work. Dredging locations Dredging is not limited to certain locations or habitats. It needs to be done wherever there is likely to be a build-up of material in water. In cities this might be because the water is slower moving, but in rural areas there may be more vegetation, which acts as a natural silt trap. The Rothen Group’s experience Dredging is a significant part of The Rothen Group’s work. Alongside the sizeable fleet it has at its disposal, the company also has a wealth of experience to draw upon. We’ve completed work for the Environment Agency (EA) and the Canal & River Trust (C&RT), along a variety of different waterways, from the River Ouse to inner-city canals. We’ve used diggers, pontoons, and crane boats to undertake projects with a host of different goals - be it environmental, aesthetic, or practical in nature, such as canal clearance ahead of winter stoppage works. Crucially, we are able to get permits and marine licenses from the EA and C&RT, ensuring that projects are completed in a safe, efficient, and environmentally conscious way. Cost of dredging a canal The cost of canal dredging in the UK, or any other type of waterway, is dependent on a significant number of factors. The complexity of the project, site access, location, and many more contribute to the overall price, which makes it impossible to provide a definitive figure. Anyone who is looking to engage The Rothen Group’s services should get in touch to discuss individual projects’ needs, allowing us to generate a quote that is specific to their unique circumstances. If you have any further questions about dredging, or would like to know more about the services The Rothen Group can offer, please contact us on 01827 215715, or email info@therothengroup.co.uk

Dredging is the practice of removing sediments and debris from the bottom of lakes, rivers, harbours, and other water bodies. Over time, sediments like sand and silt are carried by waterways downstream. Sedimentation gradually fills up the water body, decreasing its depth, and creating challenges for navigability and increasing the risk of flooding. But removing the enormous amount of material from waterways comes with several challenges. Dredging uses specialised equipment to scoop, suction, and remove underwater sediments. There are two main techniques: mechanical dredging and hydraulic dredging. The former literally digs and excavates the sediment, while the latter relies on suction and pumps to move the sediment as slurry. But which is better? And what are the advantages and disadvantages of each? In this article we'll discuss: What is Mechanical Dredging? Advantages of Mechanical Dredging Disadvantages of Mechanical Dredging What is Hydraulic Dredging? Advantages of Hydraulic Dredging Disadvantages of Hydraulic Dredging Mechanical vs Hydraulic Dredging Choosing the Right Method for Your Project What is Mechanical Dredging? Mechanical dredging involves physically digging the sediment from the bottom of the waterway. Mechanical dredging equipment includes clamshells, backhoes, and draglines to excavate and move the material. Once it’s excavated, the sediment and other debris are loaded onto barges and workboats. It’s then transported to a truck for disposal. Mechanical dredging equipment can be based on land or fitted onto pontoons and barges. This allows teams to dredge in hard-to-reach locations. Generally, mechanical dredging is recommended for sand, gravel, and other dense, compacted materials. The diggers can easily excavate this material, and it’s readily transported via barge or truck. Advantages of Mechanical Dredging Strong enough to shift tough, compacted material like clay, rubble, and gravel without struggling. Perfect when you need control and accuracy, especially around docks, marinas, and narrow canals . Material is lifted out directly, so you can see exactly what’s being removed and where it’s going. Disadvantages of Mechanical Dredging Stirs the water up more than pumping methods, which can make the area cloudy during work. Takes longer if you’re dealing with very large volumes. Needs space for cranes, barges, and machinery, which isn’t always available on tight sites. What is Hydraulic Dredging? Hydraulic dredging relies on suction and pumps to move sediments as slurry — a mixture of solids and liquids. The slurry is pumped out via pipelines to be either distributed onto the surrounding land or removed to another location. This method is recommended for sand and silt, where the material is fine and easily mixed with water. If the material is too heavy, pumping simply won’t work. Despite its speed and effectiveness, a major downside is the amount of equipment needed: dewatering facilities, pumps, and more. This restricts its potential in low-access sites where space is minimal. Plus, it can be hard to transport the equipment. However, once it is set up, it’s by far the best option. Hydraulic dredging is primarily used for river maintenance where the volume of material is high and often quite fine. Advantages of Hydraulic Dredging Clears large areas quickly by working continuously instead of in lifts or loads. Causes less disruption to wildlife and the surrounding water while work is underway. Can move material over long distances without needing fleets of boats or vehicles. Disadvantages of Hydraulic Dredging Not ideal for heavy or compacted ground, which can block or slow the system. You’ll need somewhere to separate water from the dredged material once it’s pumped out. More involved to set up, particularly for short or simple jobs. Mechanical vs Hydraulic Dredging Mechanical and hydraulic dredging might achieve the same result, but they’re very different techniques. The choice between them depends on the type of project and the material you’re moving. As mentioned, the primary difference is the type of material they move: Mechanical dredging is best for heavier, coarser material, where clamshell buckets and draglines can lift and remove a lot of material in one go. Hydraulic dredging is best for finer material like sand or silt that can be mixed with water and pumped out. The other big difference is price. Mechanical dredging is generally more cost-effective for smaller or complex jobs. Hydraulic dredging incurs a high setup cost but becomes economical the more material you’re removing. Here’s an overview of the two options: Area Mechanical Dredging Hydraulic Dredging How it works Material is physically lifted out using buckets, grabs, or excavators and loaded onto barges or vehicles Sediment is loosened and pumped away as a mixture of water and material through pipelines Best suited for Heavy, compacted ground, debris, clay, and gravel Sand, silt, and soft sediment in rivers, lakes, and channels Speed & scale Slower but more controlled, better for smaller or precise jobs Faster for large areas thanks to continuous pumping Accuracy Highly precise and well-suited to tight spaces like docks and marinas Less exact around edges but efficient in open water Impact on water Creates more visible disturbance and clouding Generally causes less disruption while work is underway Disposal & logistics Material is removed and transported directly Requires space for pipelines and drying or processing areas Setup complexity Quicker and simpler to mobilise Needs more planning and supporting equipment Choosing the Right Method for Your Project When deciding between mechanical and hydraulic dredging, there are a few questions to ask: What are the site conditions? Can you set up hydraulic dredging equipment, or is access limited? What kind of sediment are you removing? Fine or coarse? How big is the project? Is it worth the expense of setting up hydraulic dredgers? Days or weeks? What are the environmental restrictions? Do you need to operate with a small footprint or not? Answering these questions can help narrow down your choice. Sometimes, a hybrid approach is needed. Maybe there’s a layer of gravel in one section that needs removing before the hydraulic team can come in and pump out the rest. If you’re curious about how The Rothen Group can help, explore our dredging techniques to learn more about how we work. Contact us today to talk through your project and get a quote for a dredging operation.

As a team, The Rothen Group understands that it’s vital to maintain the cleanliness and health of our waterways. Across the UK, rivers, canals, lakes, and even small streams are the lifelines of our ecosystems, as waterways not only support a diverse range of flora and fauna, but they also play a crucial role in human health and well-being. Pollution, however, continues to be a significant threat, compromising the integrity and sustainability of these vital resources. In an effort to improve the health of our waterways, we’re sharing five easy top tips that individuals and communities can follow to contribute to their cleanliness. Don’t Litter One of the simplest, yet most effective, ways to protect our waterways is to ensure we do not litter, as littering has far-reaching effects beyond aesthetic concerns. Discarded waste, especially plastic, can be devastating to aquatic life and the broader environment. Plastic waste, for example, can take hundreds of years to decompose, during which time it can harm wildlife, block water channels, and contribute to pollution. Eventually, plastics break down into microplastics which can infiltrate the food chain, affecting not just wildlife but human health as well. To combat this, it is important that we dispose of our waste properly. This means using designated bins and recycling facilities, and where possible, participating in or even organising local clean-up efforts. Such actions, though seemingly small, can have a cumulative impact on the health and cleanliness of our waterways, and by making littering socially unacceptable we can all foster a culture of care and respect for the environment. Reduce, Reuse, Recycle Adopting the principles of reducing, reusing, and recycling can significantly impact the burden on our waterways. By reducing our consumption of single-use products, reusing items wherever possible, and recycling materials such as plastics, metals, and paper, we can drastically cut down on the amount of waste that ends up in our rivers and canals. This approach not only helps to keep our waterways clean but also contributes to the conservation of resources and the reduction of greenhouse gas emissions associated with waste production and disposal. Making conscious choices about our consumption habits is a step towards sustainable living and the protection of our aquatic environments. Integrating these practices into our daily lives does require a shift in mindset towards viewing waste as a resource rather than discarding without thought, but promoting a circular economy will benefit both the environment and our society in the future. Go Pesticide and Fertiliser Free The use of pesticides and fertilisers in agriculture and gardening has been linked to water pollution , causing harm to aquatic ecosystems, and potentially affecting human health. These chemicals can run into nearby water bodies during rainfall, leading to eutrophication, which depletes oxygen in the water and can result in dead zones where aquatic life cannot survive. By opting for organic gardening practices and natural pest control methods it reduces the risk of these harmful substances entering our waterways, and also promotes biodiversity and soil health. Through the use of compost, mulch, and environmentally friendly pest management techniques together we can significantly reduce the impact of gardening and farming on aquatic ecosystems. Be Mindful About What You Put Down the Drain What we pour down the drain can have a direct effect on the health of our waterways, as our household drains are linked to waterway systems. Harmful substances such as oils, chemicals, and non-biodegradable materials can cause pollution, blockages, and damage to water treatment processes. Being mindful about what goes down our drains means avoiding the disposal of hazardous materials such as paints, solvents, and cleaning products through household drains. Instead, these items should be disposed of at designated hazardous waste facilities. Additionally, using eco-friendly household products can further reduce the risk of polluting our waterways, these conscious decisions can help to protect our environment. Raise Awareness and Drive Change Lastly, raising awareness about the importance of clean waterways and the steps we can take to preserve them is crucial in driving change. By raising awareness about the challenges facing our waterways and the tangible steps individuals and communities can take to address them, we can inspire a grassroots movement dedicated to waterway conservation.  Education and community involvement is a great way to inspire collective action and to foster a culture of environmental stewardship. Organising or participating in educational workshops, clean-up events, and awareness campaigns can help spread the message and encourage more people to take action. By working together, communities can make a significant impact on the health of their local waterways, ensuring they remain vibrant and thriving for generations to come. The Rothen Group – Committed to Cleaner Waterways At The Rothen Group, we are deeply committed to the preservation and enhancement of the UK’s waterways. Our engineering solutions and environmental initiatives are designed to not only address the immediate needs of our clients but also to contribute to the long-term health and sustainability of our aquatic ecosystems. Through our projects, we aim to set a benchmark for responsible waterway management , incorporating sustainable practices and technologies that minimise environmental impact. Our commitment goes beyond our engineering services; we actively engage in community education and advocacy, promoting the importance of clean waterways and the role each of us plays in achieving this goal. By following these five top tips, we can all contribute to the health and cleanliness of our waterways . Whether it’s through mindful consumption, participation in clean-up efforts, or advocacy, every action counts. Together, we can ensure that our rivers, canals, and lakes remain beautiful, vibrant, and life-supporting ecosystems for all to enjoy. To learn more about our commitment to cleaner waterways and how you can get involved, please contact The Rothen Group today . Together, we can make a difference.

The UK is criss-crossed by many rivers that host a wide variety of flora and fauna. Between their constant use by vessel users and their importance to natural ecosystems, keeping them in good condition is a priority. The role of river management and river maintenance is therefore vital in England and Wales, and Scotland and Northern Ireland. Consequently, river contractors like The Rothen Group (TRG) carry out maintenance programmes to control canals and rivers and manage flood risks. While there aren’t river builders, marine civil engineering is used for river maintenance and risk management. In this article, we have identified key questions around river management, and provided answers. How do you control a river or waterway? Rivers are naturally occurring channels host to constantly moving volumes of water. As such, there are no river builders in a conventional sense. They are ‘made’ through rainfall and naturally occurring water sources eroding land over extremely long time periods. While river design is initially determined by nature, river management helps shape waterways to our needs. Indeed, river contractors have been instrumental in curbing wear and tear that can lead to natural disasters. This can include anything as minor as a riverbank collapses, to major events like river flooding. It can even mean the creation of synthetic river valleys. Especially with climate change in mind, flood management and flood defence are major motivators behind controlling rivers and waterways. This control can come in the form of large-scale projects like dams, which require ongoing maintenance. Alongside this, there is also ongoing soft engineering and hard engineering work. Such a combination of approaches is instrumental to river maintenance. When implemented properly, they help mitigate issues such as leaks, which could have a serious environmental impact if left unchecked. Controlling waterflow within rivers has been important for thousands of years, not only to avoid flooding but also to take advantage of the benefits the flood plain can provide and the supply of water. Since Ancient Roman times and the Yuan Dynasty, rivers have been used as an important resource, although in more recent years the focus of river and waterway control has shifted towards environmental concerns. As a result of global warming and the poor maintenance of many waterways, there is a growing risk of flooding, so it is more important than ever that an effective management program is followed. From the hydraulic civilisations along the Nile and Indus Rivers, humans have relied on river maintenance and control for water security, energy, transportation, housing, wildlife, and ecology, this is why river maintenance is so important. As climate change continues to impact temperatures, rainfall and water levels, water supply and flood risk management is clearly important for our economic, social, and environmental wellbeing. How can rivers be managed using hard engineering? Hard engineering is a form of river management using artificial methods to control naturally occurring processes. Piling , for example, is invaluable to river management and maintaining flood defences. It consists of driving post-like objects into the ground along the riverside to support structures like retaining walls. Specifically, these constructions support riverbanks that would otherwise erode over time due to contact with the constantly moving river channel. If these banks were to collapse or burst, the environmental impact caused by the resulting floods could be huge. Hard engineering processes like dredging ensure greater volumes of water can be held in a river channel, further reducing flood risks. Repeated dredging is necessary due to the constant build-up of sediment and debris on riverbeds over time. It involves the removal of this material via dredger boats and excavators either on land or on floating pontoons . By taking away this sediment, higher volumes of water flow through pressure points in waterways, keeping river levels low. There are many areas which need to be managed within any river or waterway, such as the following: Building hard engineering structures such as dams, embankments, and reservoirs to protect areas within a floodplain. Modifying the flow of the river through techniques such as straightening the channel or making it deeper by dredging. Restoration and protection of important wildlife areas, such as natural wetlands. Managing drainage channels within areas of low-lying, fertile ground such as the Fenlands. Restoration of winding courses and natural floodplains, so that floodwater is released gradually. The removal of obstructions from the river course, such as tree roots, rocks, gravel accumulations and plant growth, which could impede water flow. Natural flood management through the planting of trees, small wood dams and by storing water within open land. Hard engineering is often used to manage rivers, with artificial structures such as embankments and dams used to control water flow. For example, dams can be used to trap water within a reservoir, so that water can be released in a more controlled way, and it is even possible to produce electricity from the force of the water as it passes through the dam. What are the main types of river/waterway management? As previously stated, river management can be broken down into soft and hard engineering. Soft engineering is a form of river maintenance that emphasises environmentally friendly practices. It is often used to restore waterways that have become degraded over time through overgrowth or a lack of maintenance. Examples of soft engineering include using organic solutions as a form of erosion control, including coir rolls. Composed of coir made from coconut husks compacted into bales, these eco-friendly solutions make a dream home for aquatic vegetation. Coir rolls can offer a supportive bank barrier that also helps restore river-based habitats and ecosystems. This is especially true when used in front of Nicospan bank protection (a membrane strengthened by covariant structures in the material). This is due to the Nicospan coating, which is made of UV-stablised yarn, having an ‘open pocket’ structure. As such, plants can grow through the material without compromising its structural integrity, bolstering riverbanks in ecologically sensitive areas. Our rivers are a precious resource that we rely on for everything from fishing and agriculture through to tourism, ecology, wildlife, and infrastructure, so it is vital that they are managed effectively. We cannot live without water, and throughout the UK there are various organisations, businesses, charities, and volunteers involved with the management of our rivers, canals, estuaries, wetlands, and coastal areas, including the team here at The Rothen Group. Organisations such as TRG on behalf of local authorities, the Environment Agency and other river trusts. For more information, please contact our team .

Introduction - Ian Rothen (Founder of The Rothen Group) The construction challenges posed by the High-speed rail (HS2) project include the crossing of the new line over 17 historic waterways at various locations across the canal network and three rivers. In addition, the enabling works will see the canal towpaths utilised to lay the high voltage cables . As a result of the proposed HS2 route, the only way to reach some sites and to start the construction phases of the project will be to utilise the waterways. For HS2 contractors, this poses a set of specific challenges: replacing the high voltage cables along a towpath with weight restrictions, and other rules, to safeguard the various historic or protected sites from deterioration; navigating shallow, narrow, height restricted and awkward access sites to transport and take away building materials; and how lifting/construction equipment will be operated and stored. For the last 200 years the waterways have been part of the UK's travel infrastructure and the good news is that with the right marine plant equipment and expertise, the UK’s canals and waterways can be used very effectively as a means for enabling and constructing the HS2 rail network. Without the right proficiency in the field however, the risks for contractors outsourcing works is particularly acute. Breaking regulations may impose substantial fines or other penalties and cause significant delays to works. The implications of negative press should problems occur with a high-profile project like HS2 must also not be underestimated. It is in everyone’s interests to protect the waterways and use considerate construction practices to complete the HS2 works, and in-practice this means calling in specialists to undertake relevant works in order to manage the posed challenges and subsequent risks. To discuss any of the solutions mentioned in this article, or for more marine, civil and environmental engineering queries, please don’t hesitate to get in touch . Enabling works - How do you work on a towpath? To prepare for the works to start, understanding and complying with towpath rules and regulations is required. Key considerations, include: Weight restrictions Towpaths were not originally designed to bear weight in excess of a horse (one tonne max), so when constructing along the canals the use of heavy lifting machinery, like cranes and diggers , cannot always be performed from the towpath. It isn’t always possible to store or leave construction materials on a towpath either, if the weight of building products and/or debris from construction are too heavy. The towpath is also used by pedestrians, so it is often a requirement to keep access open. How do you get plant and materials to site with no land access? When working with towpath weight restrictions or when land access isn’t available, floating plant can be positioned in the water to get equipment and materials to site safely. When combined with a grab barge (same principal as a grab lorry), which come in various sizes with different attachments to carry materials and offload independently, floating plant is ideal. Not only will floating plant provide a s table platform for plant equipment to hold materials, as well as complete all aspects of construction from, but by using floating plant there is also no risk of damaging the surrounding area either. A grab barge or digger pontoon can then work from the water to dig trenches, take away materials and transport new materials in - whether that be stone, cables, or lifting cable drums into position. If only some land access is available, what then? Where towpath weight limits allow, a micro digger can be lifted onto the towpath to carryout works. This can either be carried on a grab barge or crane pontoon to site ready for lifting off. About floating plant Floating plant can be designed in various different sizes and drafts (depths) to ensure that even shallow waters can be navigated safely. Depending on the width of the canal or waterway, a narrow or wide-beam solution will be recommended. Typically, in the Midlands narrower canal routes must be accommodated for, and in the South wide-beam canals are more common. Canals in particular are often sloped at the sides and heavily silted against the bank, and therefore shallower at the edges, which is why floating plant needs to be designed so that construction equipment can get as close as possible to the side of the bank. If a shallow drafted option is required then a mini digger pontoon with a pusher tug and hopper is recommended. The pontoon can be fitted with a crane and also carry a range of diggers from 2.5 – 8 tonnes in weight, depending upon whether they are being used on a narrow or wide-beam canal. The pusher tugs literally push the floating skips, called hoppers, to/from work sites to be loaded from land or water-based plant. Typically, a narrow-beam hopper can carry up to 20 tonnes, the same carrying capacity as an eight-wheel lorry. A wide-beam hopper can carry up to 30 tonnes, the same as an arctic lorry. Phase 1 & 2 - Land Restrictions Depending on the severity of land restrictions, one of two options is usually recommended. Site Access restrictions With limited access, equipment and construction materials can be transported via the canal/river and offloaded at the site. The Rothen Group’s floating excavator pontoons, for example, float to site and then lower ramps onto the bank to track the digger/other plant off. No land access If no land access is available, as a result of either towpath weight restrictions not allowing an excavator to be placed on the land, or due to the works needing to take place between two bridges for instance, then solutions exist to enable excavation works to happen off the pontoon itself. Phase 1 & 2 - Working over waterways It is likely that construction will need to happen over the waterways - for instance if a bridge needs to be demolished, widened, or inspected before works take place. When working over the waterways, a crash deck or floating pontoon can be used to create a stable working platform in order to place scaffolding, or if demolition is required this is also a way of protecting debris from falling into the waterway. Safety first Civil engineering and construction work on the canals, rivers and water ways are different to the challenges faced on land and as a result include specific safety rules and regulations. All equipment must meet safety standards, including the Boat Safety Certification, Stability Calculations for crane boats/pontoons and Lifting Operations and Lifting Equipment ( LOLER ) regulations. Works carried out must also be completed by specialists who are qualified and trained to operate all boats and machinery safely. The core qualifications include, Construction Site Competency Scheme (CSCS), RYA Helmsman, Water Safety Training, Site Managers Safety Training Scheme etc. Failure to to prove suitability of all boats, equipment and personnel on-site could result in fines and delay project completion. Case Study: Cabling works along towpaths In the winter of 2013, The Rothen Group worked with Western Power Distribution and Morgan Sindall to replace and remove existing cables with new higher voltage cables, within canal towpaths in Birmingham. Based very close to the city centre in a busy industrial and built-up area with few access sites, the first challenge was to find a solution to get the plant and equipment to the site. To further complicate the situation, the site was located within a flight of canal locks meaning that boating ‘traffic’ was high in the area. To complete the job, The Rothen Group’s 70ft grab barge was used to load materials onto it before floating it to the construction site. Once at the site, all of the materials were off-loaded, and then the trenches for the cable dug. For speed and efficiency, a shallow drafted tug and hopper solution pushed the floating hopper skips to and from the work sites to take away debris with ease, even in low waters. To care for operatives completing the works and to also keep equipment safe from potential t heft, floating welfare facilities along with secure floating plant storage for equipment were both provided. Ian Rothen, Founder of The Rothen Group , said: “Our knowledge of the canal network, combined with the specialist boats and equipment we have designed to make construction in awkward access sites and shallow water environments possible meant that the entire project was completed on time, in five months.” Ian, continued: “Because of the minimal site access, the grab barge made life easier for everyone involved as materials could be brought to/from site with no trouble. It also meant that access could be kept open for pedestrians to walk along the towpath.” How long does mobilisation usually take? 24-hours is the usual time taken, due to the design of the equipment being movable by Hiab lorry. Will works disrupt pleasure boaters and how will this be managed? Not normally. If boats are designed to allow other boating traffic to be able to pass, as is the case with The Rothen Group’s extensive fleet, then usually a banksman is employed to communicate what is going on to boaters and to help manage the public. Occasionally, construction works can involve lowering of water levels or lock gate works and therefore a ‘stoppage’ would be put in place in advance. How environmentally-friendly is a marine hire solution? A boat will typically use three litres of diesel per hour, while a lorry will usually use around 20 litres per hour. The Rothen Group’s fleet is marine approved to lessen the impact on the environment and protect the waterways. The Rothen Group Capabilities Over 70 boats All excavators LOLER certified Over 20 years' experience in marine, civil and environmental engineering Trained operators for complete service solutions, or full training offered Full project management capability Ecological and environmental advisor Storage and welfare pods also available for hire In Conclusion The HS2 line creation is a momentous construction challenge that will make its mark on the history of UK rail and have a lasting impact on the travel infrastructure in Britain. All eyes are on the construction of the new line and as a result, contractors cannot afford to accept anything less than excellence when it comes to construction on the canals , rivers and waterways during Phase 1 and Phase 2 of HS2. Contractors must show that they have taken all reasonable precautions to complete works safely, efficiently and in line with regulation. Only through working with responsible marine, civil and environmental engineering businesses with a proven track-record of working on the waterways can this be achieved. About the Author Ian Rothen, founder of The Rothen Group – a national independent civil engineering and maintenance business servicing UK Waterways - has lived and worked Britain’s canals, rivers and lakes for the last 18 years. Having been born into a family of work boat enthusiasts, Ian was exposed to the marine and plant hire industry early on, and started learning the family business at the young age of nine. Ian purchased his first work boat, a traditional ex-canal carrying boat, at the age of 15. The work boat, which is still in use thanks to being refurbished in 2017 to include one of The Rothen Group’s specialist cranes, was the start of a lifelong passion and The Rothen Group today boasts over 70 work boats. Now, Ian has developed the business, which was founded in 2012 under the trading name Ian Rothen Ltd, and rebranded into a national operation, The Rothen Group in 2015, servicing clients ranging from the Canal and River Trust and major contractors including Kier. This success can be attributed in part to the wide range of services The Rothen Group offers, and the unique problem-solving engineering behind the marine boat and plant equipment designed by Ian.

Marine construction requires a specialised skill set, and that's precisely where marine contractors come into play. These knowledgeable professionals are experienced in a range of tasks, from constructing and repairing marine structures to maintaining docks, piers, and bridges. In this article, we delve into the role of a marine contractor, exploring their responsibilities, skills, and the pivotal role they play in the development and maintenance of maritime infrastructure. The Construction, Repair, and Maintenance of Marine Structures A marine contractor is a professional with expertise in the construction, repair, and maintenance of various marine structures. These structures encompass a broad spectrum, ranging from docks and piers to bridges and other waterfront facilities.  Construction: Successful construction projects require a comprehensive understanding of marine engineering, coupled with consideration for environmental factors and adherence to local regulations. The ability to navigate the complexities of designing structures that can withstand the dynamic forces of the sea is paramount, and these contractors are at the forefront of both the planning and the execution of various marine projects. Tasks often include the construction of docks, piers, breakwaters, alongside other waterfront facilities. Repair: When existing marine structures face damage or deterioration, marine contractors play a pivotal role in assessing the extent of the issues and devising effective repair strategies. This may involve reinforcing structures, replacing damaged components, or implementing improvements to enhance overall resilience. This requires a thorough understanding of structural integrity and the impact of environmental variables on the longevity of these structures. Maintenance: Ongoing maintenance is critical for ensuring the longevity of marine structures, and contractors oversee routine inspections, promptly addressing any issues to prevent minor concerns from escalating. Regular maintenance is essential for structures to withstand the constant exposure to water, weather, and vessel traffic. This aspect of the job requires a proactive approach, anticipating potential issues and implementing preventive measures to extend the life of the structures. The Maintenance of Docks, Piers, and Bridges The responsibilities of marine contractors extend to the vital components of waterfront infrastructure, particularly docks, piers, and bridges. These elements, vital for maritime activities, endure relentless forces from the marine environment. Docks and Piers: Maintaining the structural integrity of docks and piers is a key responsibility of marine contractors. These structures are integral components of waterfront infrastructure, and it is the responsibility of marine contractors to conduct thorough inspections and to implement repairs and reinforcement measures as necessary. Additionally, they may be involved in the installation of new dock and pier systems to accommodate evolving needs, requiring a balance between innovation and adherence to established engineering principles. Bridges: Marine contractors are tasked with the maintenance of marine bridges , which are critical components of maritime environments. This involves inspecting bridge components, addressing issues such as corrosion, and ensuring that the bridge remains structurally sound. Marine contractors may also be involved in the construction of new bridges to facilitate maritime transportation. The unique challenges presented by marine bridges, including exposure to saltwater and dynamic tidal forces, demand a specialised skill set. The Maintenance of Marine Structures and Vessels The responsibilities of marine contractors also extend to marine structures, such as seawalls, jetties, and offshore platforms, alongside essential vessel maintenance. With such a diverse range of tasks, contractors require an excellent understanding of marine engineering principles and the challenges faced within the dynamic marine environment. Marine Structures: Beyond docks, piers, and bridges, marine contractors are responsible for maintaining various other marine structures, such as seawalls, jetties, and offshore platforms. The goal is to ensure these structures remain resilient against the corrosive effects of saltwater, wave action, and other environmental factors. Maintenance strategies include protective coatings, monitoring erosion, and implementing erosion control measures to preserve the structural integrity of these vital components of coastal infrastructure. Vessels: In some cases, marine contractors are involved in vessel maintenance, ranging from small boats to larger vessels used in marine construction projects. Tasks may include hull repairs, engine maintenance, and other necessary work to keep vessels in operational condition. This aspect of the job requires a comprehensive understanding of marine engineering principles and the ability to address the unique challenges posed by maintaining vessels in a marine environment. The Rothen Group: Leaders in Marine Contracting The work of a marine contractor is indispensable in creating, upkeeping, and preserving the intricate web of marine structures that support coastal communities and maritime activities. From construction and repairs to ongoing maintenance, marine contractors navigate the complexities of environmental variables and engineering principles, ensuring the resilience and functionality of maritime infrastructure. Here at The Rothen Group, we are proud to be leaders within the dynamic industry of marine contracting . With a rich history rooted in a passion for the UK's canals and rivers, our experienced team brings decades of expertise to every project. Our proficiency in marine construction is evident in our ability to undertake projects of varying complexities.  Whether constructing new docks, reinforcing seawalls, or developing innovative erosion control solutions, we approach each task with precision and dedication. From routine inspections to prompt repairs, our team ensures that waterfront facilities remain resilient in the face of changing environmental conditions. With a commitment to sustainability, safety, and innovation, we navigate the world of marine construction with precision and dedication. To find out more about our marine contracting services or to explore how we can contribute to the success of your project, please contact our experienced team .

Excellent water management is essential to ensure canals, rivers and other watercourses are preserved and functional. If this management falters, a ripple effect of issues can quickly unfold which could impact both the environment and surrounding infrastructure. In this article, we delve into the repercussions of poor water management on the network of canals and rivers in the UK, examining how neglect can lead to erosion, decay, ecological imbalance, and more.  Banks erode One of the most visible consequences of poor water management is the erosion of canals and riverbanks. As water levels fluctuate unpredictably due to inadequate management, the banks are subjected to continuous stress. The destabilisation of these banks not only compromises the structural integrity of the waterway, but also poses a threat to adjacent lands and infrastructure. To safeguard against potential erosion and to ensure the stability of banks, innovative bank protection strategies are required. 2. Lock gates rot Lock gates are essential components of canal systems, and unfortunately, they are particularly susceptible to deterioration when water management is poor. Inadequate water levels and irregular maintenance contribute to the rotting of lock gates, compromising their functionality. This not only disrupts water navigation but also adds an additional layer of costly repairs to the overall infrastructure. To combat this potential issue proactive maintenance is required with approaches tailored to the specific challenges of each canal system. 3. Overgrown pathways Pathways alongside canals and rivers were once bustling with activity, however in today’s world they can succumb to neglect and poor water management. The lack of regulation in water levels and inadequate vegetation management allows greenery to flourish, gradually overtaking these pathways as nature encroaches. This not only diminishes their functionality but also poses safety concerns for pedestrians and cyclists. 4. Unstable wall banks Wall banks are integral to the structure of canals and rivers; however, they can become vulnerable in areas of poor water management. The often-fluctuating water levels and inadequate wall bank maintenance contribute to the instability of these structures, leading to potential collapses. The consequences extend beyond immediate structural damage, impacting adjacent properties and the overall safety of the waterway. 5. Buildup of litter and trash Poor water management not only affects the physical structure of canals and rivers but also gives rise to environmental issues. Neglected waterways become magnets for litter, compromising water quality, harming aquatic life, and detracting from the aesthetic appeal of these natural corridors. Careful management of litter with wier booms and litter screens is required to maintain water quality and ecosystem health, and initiatives should be designed to align with the environmental regulations that ensure responsible waste management. Ecological imbalances Perhaps the most significant impact of poor water management is the disruption of ecosystems. Fluctuating water levels, pollution, and habitat degradation upset the delicate balance of flora and fauna in and around canals and rivers. Biodiversity dwindles, and once-thriving ecosystems transform into ecological deserts. A strong commitment to environmental sustainability can help to both restore and maintain the delicate balance, and we are committed to preserving the unique biodiversity of our waterways. The Rothen Group – Navigating towards responsible water management The consequences of poor water management within canals and rivers are far-reaching, affecting both the infrastructure and the environment. Through a proactive and holistic approach, here at The Rothen Group we strive to mitigate these issues, offering solutions that not only address immediate concerns but also contribute to the long-term health and sustainability of these vital waterways. To find out more about how we aim to create a resilient and thriving aquatic landscape for generations to come, please contact our team today.

Urban vs. Rural: Canal Maintenance Challenges Across the UK Here in the UK, we are very lucky to have an extensive network of canals, many of which have played a crucial role in shaping the nation’s industrial heritage. Today, these waterways serve not only as vital environmental and recreational assets but also as key pieces of infrastructure that require consistent maintenance to remain functional. Canal maintenance is a complex task, particularly as the challenges vary significantly between urban and rural environments.  For example, urban canals are often subjected to high levels of pollution, heavy foot traffic, and aging infrastructure, while rural canals face issues related to vegetation overgrowth, difficult access, and water management. Understanding these distinct challenges is crucial for the effective maintenance of canals, ensuring they remain navigable, safe, and ecologically healthy. Urban Canal Maintenance Challenges Urban canals, which weave through cities such as Birmingham , London , and Manchester , face a different set of challenges compared to their rural counterparts. The proximity to large populations and industrial activity brings specific issues that need to be addressed through consistent maintenance. Pollution and Waste Management One of the most pressing challenges for urban canals is the high level of pollution and waste that accumulates in these waterways. With dense populations comes the frequent issue of littering and fly-tipping which can negatively impact water quality and the surrounding environment. Items such as shopping trolleys, tyres, and even furniture can often be found obstructing urban canals.  The canals in Birmingham and Manchester are often cited for their high levels of litter and pollution. Household items and industrial waste frequently end up in these canals, necessitating frequent use of trash screens and debris removal services to prevent blockages and maintain water quality. In addition, industrial activity in urban areas can lead to chemical spills, oil runoff, and other pollutants entering canals, degrading water quality and harming wildlife. The maintenance of canals in these settings often revolves around waste management, requiring both preventive measures and regular clean-up operations. Structural Ageing in Built Environments Urban canals often have ageing infrastructure, including lock gates, brick retaining walls, and footbridges, which require constant monitoring and repair. Many urban canals feature centuries-old structures that were built during the industrial revolution. These ageing components are prone to degradation over time and require regular repair or replacement to prevent hazards. The impact of foot traffic, vibrations from nearby roads, and urban construction activities exacerbates wear and tear on these structures, making structural maintenance a critical part of the upkeep. In addition, the footpaths that run alongside urban canals also face significant stress from pedestrians, cyclists, and nearby construction activities.  Bank erosion and footpath subsidence are common issues that must be addressed to maintain safe access for both visitors and maintenance teams. The need for bank maintenance and footpath upkeep is constant, given the often-heavy use by both commuters and recreational users. High Traffic and Vandalism Urban canals are highly popular for recreational activities, including walking, cycling, and boating. However, this increased usage also leads to more wear and tear on the canal infrastructure such as lock gates and paths. In addition, urban areas are more prone to incidents of vandalism with the increase in boat traffic also resulting in more frequent lock operation, leading to faster deterioration and a regular maintenance burden. For example, The Grand Union Canal in London frequently experiences vandalism, including graffiti on bridges and damage to lock mechanisms. This requires regular cleaning and repairs to keep the canal operational and safe for both boaters and pedestrians. Rural Canal Maintenance Challenges While rural canals benefit from less foot traffic and pollution, they come with their own set of maintenance challenges. These range from the natural encroachment of vegetation to issues with water management in remote, often hard-to-reach areas. Vegetation Management Rural canals are surrounded by natural landscapes, making vegetation management a key aspect of their upkeep. Overgrowth from nearby trees, reed beds, and aquatic plants can obstruct waterways, increasing the risk of bank erosion and impeding navigation, especially if it is left to grow unchecked if not properly managed. Vegetation can either stabilise or destabilise canal banks. While some plant roots help prevent erosion, the growth of larger trees and invasive species can weaken banks, leading to collapse and requiring urgent repair. This means that canals in rural regions often require routine dredging and vegetation clearance to ensure that navigation routes remain open and safe, especially during the peak growing season in spring and summer, with autumn maintenance efforts necessary to prepare for winter. Access Difficulties One of the major challenges in rural canal maintenance is access. Many rural canals are located in remote areas, far from major roads or infrastructure, making it difficult to transport maintenance equipment and materials to the site. The lack of nearby facilities and roads adds logistical complexity to maintenance operations, with the transportation of heavy equipment, such as dredgers or excavators, more complicated and time-consuming. In some cases, maintenance crews must rely on workboats to transport materials or set up temporary roadways to reach secluded sections of the canal. These measures require careful planning and coordination. In the remote sections of canals, our maintenance teams often use workboats to transport equipment to areas that are inaccessible by road. The Rothen Group’s experience in navigating these access challenges ensures that even the most remote canals can receive the necessary maintenance. Water Management and Flooding Rural canals are often more dependent on natural water sources, such as rivers, streams, and rainfall, which makes them more susceptible to fluctuations in water levels. Managing these water levels is critical to preventing both flooding and drought conditions, which can damage canal infrastructure and disrupt navigation. Heavy rains in rural areas can quickly lead to flooding, particularly in low-lying areas or where canals are fed by natural water sources. Without proper water management, banks can overflow, causing erosion and damage to surrounding land. However, rural canals are also susceptible to low water levels during dry spells, which can make navigation difficult and strain aquatic ecosystems. Monitoring and managing water levels in these areas require careful planning and regular maintenance. Many rural canals face fluctuating water levels, especially during the transition from autumn to winter. These canals require regular monitoring of water sources and flood management strategies to prevent bank erosion and maintain safe navigation levels. The Rothen Group – Experienced Rural and Urban Canal Engineers Both urban and rural canals across the UK present unique maintenance challenges, requiring tailored strategies to ensure their longevity, safety, and functionality. Urban canals face high levels of pollution, structural wear from heavy usage, and frequent vandalism, necessitating frequent waste management, structural inspections, and repairs. Meanwhile, rural canals contend with vegetation overgrowth, difficult access, and water management challenges, requiring careful planning and the use of specialised equipment such as workboats and dredgers. The Rothen Group’s expertise in both urban and rural canal maintenance ensures that these challenges are met with precision, efficiency, and a deep understanding of the unique characteristics of each environment. If you’re facing canal maintenance challenges, contact The Rothen Group today to learn how we can support your project, no matter the location or complexity.

We have had a number of articles published about our work and are proud to be growing the business with our clients and colleagues. Here is a round up of coverage in 2018 so far! ​ Dredging Today: The Rothen Group Raises The Bar The Rothen Group Introduces New Boat To Its Fleet ​ Towpath Talk - Page 63 ​ Midlands Business News: Unprecedented Growth For The Rothen Group ​ ​

One of The Rothen Group's historic workboats returning back along the Ashby canal having completed piling works on an embankment that was leaking into a farmers field for Kier and Canal & River Trust . Can you guess what the classic engine is? #lifesbetterbywater #waterwayswednesday

Our last blog focused on the topic of crane barges. What they are, why you might need one, and the various sizes and attachments you might come across in this type of marine construction. The next step, once you’ve decided that a floating crane barge would benefit your project, is to go ahead and rent one. This may sound daunting, particularly if you haven’t done it before, but as long as you are aware of the key considerations, the barge crane rental process doesn’t have to be too complicated.   This guide is designed to help you through the process, and provide insight into the key factors that influence crane barge rental rates. It will also cover some of the logistics involved, both in terms of the process, as well as actually getting the equipment to your site. Key considerations of barge crane rental The logistics of renting a crane barge varies drastically depending on a number of different factors. This is why The Rothen Group provides bespoke quotes, tailored to the unique circumstances of each individual project. This takes into account the length of time the barge will be hired for, the accessibility of the location, and a wide range of other, site-specific considerations that are listed as follows: Size of the crane, which effectively dictates the barge crane lifting capacity Attachments that are needed to do the works, including piling hammers, clamshells, post drivers etc Width of the waterway Depth of the waterway Reach of the crane required Whether the crane needs to be mounted on the front, middle, or back of the barge deck, depending on the type of works being done Whether remote operation is required on the crane Whether there is lock-gate changing involved Clearly, there are a wide array of factors that can influence crane barge rental rates. This is why The Rothen Group has such a large and varied fleet, allowing us to provide for many different number of projects and locations. If clients are able to provide us with as much of the above information as possible, we can usually provide an accurate quote within 48 hours. We’ll also talk through any unique requirements you may have, such as whether you need us to operate the crane barge for you. The most important thing to do is to get in touch, give us as much information as you can, and the process of hiring a work boat can move along swiftly. Logistics of hiring a crane barge Depending on availability, we can often mobilise within 24 hrs - 48 hrs. Again, this largely depends on factors such as location and complexity of the project, but we have a team of experts who know where our kit is, and can manage the logistics of getting our equipment to your site. In this regard, there are further issues surrounding the delivery of the crane barge to site that it is important to be aware of. For instance, the time of year can have an effect, given that there may be navigational restrictions in place along waterways. This is especially true during the winter months, when the Canal River Trust is often conducting works which close the canal. In cases where the crane barge cannot be floated to the site, we are able to move the equipment by land before lifting it onto the water. Ideally, there will be a suitable lift site to facilitate this, but we understand that this will not be possible for all projects. In which case, we will visit the site to analyse the best course of action, considering factors such as location, or if it is a heavy lift. The type of vessel required for a project varies drastically from location to location, which is why The Rothen Group has such a diverse fleet. With crane barges ranging from 40ft to 70ft, the geographical parameters of a project can usually be negotiated with relative ease. It is during the initial conversation that we establish which boat is most appropriate, ensuring that works can begin as quickly as possible, with minimal fuss and expenditure. As mentioned in our last blog, there are numerous attachments that can be fitted to, to crane barges, depending on what application is required. From air hammers to hydraulic post hammers, The Rothen Group offers various solutions to equip contractors with the tools to do the job . Part of the initial conversation with someone who has approached us would be to explore which attachments would be useful for their project, ultimately providing a complete marine construction solution. Naturally, given the huge range of influencing factors, it is impossible to provide a definitive figure for crane barge rental rates. That’s why we assess it on a case-by case basis, providing a quote specifically tailored to each project’s needs. Our large fleet and network of highly experienced hauliers, allow us to deliver equipment to a wide range of locations, efficiently and effectively. If you have any further questions about crane barge vessels or would like to know more about the services The Rothen Group can offer, please contact us on 01827 215715, or email info@therothengroup.co.uk

Do you need a floating crane barge vessel, but don’t know where to start? As the largest supplier of floating cranes and owner of the largest fleet of narrow beam crane barges, The Rothen Group can help. We have put together a list of common questions about floating barge cranes, so you can know the difference between your crane vessels, grab cranes and propelled barges. Read on, and find out more about marine construction. What is a floating crane barge? For certain water-side construction projects, it might not be possible to get a normal, land-based crane installation to site. Where this is not possible, mobile cranes on barges let you carry out your tasks on water, so you can save site space. These solutions come in different sizes depending on the application and your barge crane lifting capacity requirements. So whether you need a small crane barge or a heavy lift crane barge, there are a number of options for your specific application. Why would I need a floating crane barge? A crane barge vessel can be used for a number of tasks, as listed below. Constructing piling – piling is used to stabilise canal and river banks. It involves driving sheets of material with interlocking edges, otherwise known as piles, into the earth between the waterway and its bank, enabling better bank retention. Depending on site constraints, it may be more practical to use a floating crane barge to carry out this activity. Installing nicospan – nicospan is an environmentally sensitive bank protection material. It is suited for smaller watercourses or sites with less use and wear. It may be difficult to carry out land works on these sites, meaning small crane barges with mounted cranes offer a potential solution. Carrying and lifting materials to sites – where no other access is possible, a heavy lift crane barge could transport large quantities of material to construction sites. Carrying plant to sites – transporting diggers, dumpers and chippers to river or canal-side sites can be tricky. Depending on barge crane lifting capacity, a floating crane barge can make transporting plant easier. Carrying out towpath works – creating new towpaths or resurfacing existing towpaths with resin, towpaths with resin, tarmac or gravel may require a floating barge crane solution. Lifting bridges into place – where there is no land access, a heavy lift crane barge, or mobile cranes on barges, can be used to help construct waterway bridges. Carrying out dredging – barge mounted cranes can be used to dredge inland waterways. After the river or canal bed is dredged, mobile cranes on barges can be used to transport materials to deposit sites. This material can then be re-used as topsoil or compost. Undertaking marina repairs/maintenance – a crane barge vessel can dredge a marina, and crane vessels with a higher barge crane lifting capacity can help install or refurbish pontoons and jetties. Installing pipework and cables along towpaths – floating crane barge vessels can be used to transport materials required for towpath cabling and piping, and to dig trenches to help with installation. Aiding demolition works – floating barge cranes and mobile cranes on barges can help carry materials away from sites where demolition works are taking place. Changing lock gates – canal lock gates raise and lower ships and barges, allowing them to navigate different levels of river and canal. The average lock gate lasts for 25 years before they need to be replaced. If they are located at sites that may be difficult to navigate, mobile cranes on barges and heavy lifting crane barges may be needed. Who operates floating crane barges? We offer cranes barges that are powered with an engine, and others that are unpowered. Therefore, you may need a crane operator in some instances. Any crane operator must have Construction Plant Competence Scheme (CPCS) or National Plant Operators Registration Scheme (NPORS) certification. For sites requiring a powered crane barge, the operator must also have a RYA Helmsman Certificate of Competence. This industry-recognised qualification is well-known, highly-respected and proves the operator’s experience and competence as a boat skipper. They will also be Hiab trained, meaning they can use lorry-mounted cranes to transfer vessels from the vehicle to the water. For smaller lifts, the operator will sit in the machine, aboard the crane vessel. However, if a heavy lift crane barge is required, remote controls can be used to operate the crane. This means the operator can be clear of the vessel during the lift. ​ What are the important parts of a floating crane barge? When considering a floating crane barge, it is important look at a number of factors. This includes the stability of the boat, which is created using stabiliser legs and large feet pads. Depending on the depth of the waterway, your crane barge vessel may need to be fitted with longer stabiliser legs to ensure a stable working platform. Boat dimensions are also important when considering hiring a floating crane barge. The beam, or width, of a crane barge vessel will determine whether it can work on narrow or wide waterways. The draft of the boat – the vertical distance between the waterline and the bottom of the hull – also needs addressing, as it determines the minimum depth the crane barge vessel can work in and safely navigate. As such, a boat with a larger draft may not be suitable for work in shallow water. The barge crane, and the barge crane lifting capacity, should also be kept in mind. Depending upon the size of waterway and weight of lift, The Rothen Group offers four types of crane barge. All these barges have been fitted with the latest Lifting Operations and Lifting Equipment Regulations (LOLER) technology (including drop control valves), are marine-approved, and run on bio-oil. The Rothen Group’s barge crane options include: 40ft Crane Boat – able to be moved by hiab lorry to keep mobilisation costs down, this small crane barge is self-propelled and highly manoeuvrable. Its twin vertical stablisers at the front and two rear frog feet stabliser legs keep the boat stable while the front-mounted Atlas crane is in operation. The crane has seat-mounted controls to optimise visibility and usability. 50ft Crane Boat – ideal for piling, dredging bank stablisation works and transporting up to five tonnes of materials to awkward access sites, the 50ft crane barge vessel has a 1.5 tonne lifting capacity, with hydraulic stabiliser legs that go down to a depth of two metres. 70ft Grab Barge – this 70ft propelled barge is fitted with a Fassi F40 hiab with a range of 6.3m. It is self-loading and self-discharging, with two removable watertight skips to store dredgings or concrete. Its 20-tonne carrying capacity makes the 70ft floating crane barge ideal for carrying out spot dredging and piling. This vessel can also be used as a pusher tug or hopper . 70ft Crane Boat – purpose-built for lifting and replacing narrow beam lock gates, this heavy lift crane barge features a remote-controlled Atlas crane with a maximum lift of 3.5 tonnes at 4.5 metres. Its large hold space can house 20 tonnes of materials, including lock gates, enabling materials to be easily removed and delivered from sites with poor access. Wide Beam Crane Barge – our new wide beam crane barge has a carrying capacity of 25 tonnes, and a 7m internal load space with sealed internal tank, allowing it to carry solid and liquid materials. Its front-mounted crane allows for a 360-degree working space, and has a capacity for 3.5 tonnes at a 4.5m reach, and 870kg at 14m reach. Narrow beam Crane Pontoon – with a one-tonne barge crane lifting capacity and a reach of 6.3m, the pontoon’s four stabiliser legs create a very stable platform which go to a depth of 1.7m with a 1m extension available. When transporting a machine, the side stability tanks can be swung around to the rear of the crane vessel to enable it to pass through locks or narrow bridges. Wide Beam Crane Pontoon – a specialist, purpose-built vessel with a six-tonne maximum lift, it has a maximum outward reach of 8m and an upward reach of 10m. It is ideal for lock gate changing operations where the pontoon can transport and lift in the new gates all in one operation, and then load the old gates and transport off site. What attachments can be fitted onto a floating crane barge, and why would you fit these attachments? Different attachments can be fitted depending what application the barge mounted crane is being used for. The Rothen Group have a range of attachments adapted to suit your requirements, including: Vibro piling hammers – compact, robust, reliable and able to be quickly attached to mobile cranes on barges, these vibratory hammers work in place of an excavator bucket. They are available in multiple sizes depending on crane size, and drive and extract piles in a productive and cost-effective fashion. Air hammers – air hammers are ideal for trench sheeting, as well as driving light pile sections, H-section columns, carrier posts, steel tubes, plastic and timber piling, and mooring or jetty scaffolding. Hydraulic piling hammers – used in hard ground conditions, free-hanging hydraulic impact piling hammers are easy to operate and maintain at low cost. The Rothen Group offer hydraulic piling hammers in three sizes floating cranes sized 2.5 tonnes and over. Hydraulic post hammers – especially suited to driving posts for the installation of nicospan and ocir rolls, The Rothen Group offer a range of hydraulic post drivers to suit barge mounted cranes from 1.5 to 5 tonnes. Clamshell buckets – clamshell buckets are mounted on floating barge cranes of varying sizes and can be used for dredging or clearing debris from water. Chain slings – heavy duty chain slings can be attached to heavy lift crane barges to enable equipment to be lifted onto the barge or water-side construction site. If you have any further questions about crane barge vessels or would like to know more about the services The Rothen Group can offer, please contact us on 01827 215715, or email info@therothengroup.co.uk.