Dredging a lake, dredging a river, or canal dredging requires a set of specialist equipment like drag heads and suction pipes. These are used to remove organic sediment from lakes and ponds or other bodies of water that require dredging work. Litter and other debris is removed in the same process. Dredging projects improve water quality and prevent buildups of toxic gases that can occur on the bottom of ponds, canals and rivers. Dredging is not only important for maintaining waterways, lakes and ponds, but it also has eco-friendly benefits. As silt and sediment wash downstream, they can build up to levels unsafe for fish and other animals. Plants can find it difficult to thrive in water that has too high levels of sediment. The problem is made even worse if dredging has been neglected for several years, or if the sediment is contaminated or filled with pollutants. Without regular maintenance, including dredging, ecosystems can struggle. The quality of water is reduced and bacteria can spread making the area unsafe and unpleasant. Dredging is a necessary task to be carried out regularly to ensure that all who use the water can enjoy doing so with fewer risks. When deposits build up, it can become a flood hazard as well. Enough of a buildup can grow into an obstruction that will cause water to spill over its banks. During periods of heavy rainfall, this can lead to flooding which can be extremely dangerous and cause extensive property damage that is costly to repair. The action of dredging is similar to scooping. Unlike a trailing suction hopper dredger (TSHD) which works like a vacuum cleaner, most mechanical dredging involves physically scooping material deposits. Water is allowed to run off so excess fluid is not needlessly transported to the discharge site. A hopper is a container for loose material. In the case of hopper dredgers, the hopper contains the silt, litter, and plant matter removed when dredging a pond. Once the dredging is complete, the hopper is transported to an appropriate location for emptying. There might be special safety or environmental considerations to take into account when emptying a hopper. This depends on what has been dredged up during the project. Hoppers are emptied at discharge sites. Assuming the silt is uncontaminated, it can be dried and transported via lorries to farms. It can then be reused as a healthy natural fertiliser. The Canal & River Trust and other environment agencies work with contractors like The Rothen Group (TRG) to carry out dredging activities. This may include hydraulic dredging, mechanical dredging, or even land reclamation. A hopper dredger is most often used in maintenance dredging. Dredging a canal is not as simple as dragging up deposited material and placing it in a hopper to be removed. Canals are lined with a special clay called puddling clay. This is a vital part of a canal’s ability to function as it prevents leaks into the surrounding earth. If a dredger, digger, or long reach excavator were to break the puddling clay, it could cause a very expensive leak. Because of this, it is important that dredgers are operated by highly trained experts. Depending on the site, dredging equipment may be able to be placed on the river or lake bank. At other times, where access to the site is more difficult, TRG uses its fleet of workboats to transport machinery. Cities that have canals running through often need to be accessed via the water, as walkways and towpaths are not suited to transporting heavy machinery. Once in the right place, hydraulic powerpacks extend four stability legs into the riverbed or lakebed, keeping the equipment level and safe to work with. From waterways maintenance to towpath construction, it is vital to consult with experts on every type of marine engineering, including hopper dredging. TRG, for example, can provide expert guidance on equipment rental and give specialist advice on bespoke marine projects.

Sediment is a natural part of healthy waterways. It carries nutrients downstream, supporting ecosystems before eventually reaching the sea. It only becomes a problem when excessive quantities accumulate faster than they can be transported away. In rivers, canals, reservoirs, and marinas, excessive siltation can reduce depth, damage habitats, and, in the worst cases, cause navigation problems. The result isn’t just damage to the waterway. Removing accumulated sediment through dredging can also cost considerable time and money. That’s why it’s more sustainable to prevent excess sediment from entering the water than to remove it repeatedly. Doing so requires a combination of source control, targeted engineering, and regular monitoring. In this article we'll discuss: What Sediment is What Is Siltation and Why It Matters Primary Causes of Sediment Accumulation in Waterways Best Practices for Preventing Siltation How to Control Existing Sediment Build-Up Monitoring and Detecting Siltation Early A Long-Term Approach to Waterway Health with The Rothen Group What Is Sediment? Sediment consists of particles transported and deposited by water, including clay, silt, sand, gravel, and organic material. It comes from natural bank erosion, soil runoff, and decaying vegetation. Human activities, including construction, can also introduce soil, dust, and debris into waterways. Sediment isn’t exactly the same as silt. Silt specifically refers to one fine particle-size category, while sediment is the broader term for all transported material. Why Do Rivers Deposit Sediment? Moving water carries sediment according to its speed, turbulence, and volume. Fast-moving or deep water carries sediment more easily. But as the flow slows, it loses the energy needed to keep particles suspended, causing them to settle. That is often why you see erosion and sedimentation around river bends. Slower-moving water deposits sediment on the inside of a bend, while faster flow erodes the outer bank. Other sites where rivers and waterways deposit sediment include: Widened channels Backwaters Confluences Reservoirs Areas upstream of locks, weirs, and other structures What Is Siltation and Why Does It Matter? Siltation is the same as sedimentation, except it refers specifically to the gradual accumulation of fine sediment. Substantial deposits can reduce water depth, alter flow patterns, and obstruct structures. This is all a natural part of how rivers and waterways evolve over time. But if excessive, it can cause problems for human infrastructure, increasing the risk of flooding. The Environmental and Economic Impact of Sediment Build-Up Riverbeds are a critical part of aquatic ecosystems. Fish spawn there, aquatic plants take root, and the sediment provides habitat for insects and other invertebrates. If sediment increases, it can cover fish spawning grounds. Elsewhere, in slow-moving waters, the high nutrient levels can trigger algal or plant blooms that then harm other species in the waterway. Tackling high rates of sedimentation places a cost on authorities, landowners, marinas, and other waterway managers. Unless the upstream cause is dealt with, there is a recurring cost of surveying, dredging, transporting, testing, and removing deposited material. How Siltation Affects Navigation and Flood Risks Boats require a minimum depth to navigate safely. Sedimentation naturally reduces the navigable depth, creating shallow areas around bends, locks, bridge openings, and marinas. This increases the risk of grounding or striking submerged deposits. Heavy sediment deposits can reduce channel capacity and restrict flow beneath structures, increasing flood risk in some locations. That said, dredging isn’t always the answer. The Environment Agency warns that poorly planned dredging can accelerate flows, increase downstream erosion, and disturb valuable habitats. Primary Causes of Sediment Accumulation in Waterways Soil Erosion from Agriculture and Deforestation Rainfall loosens particles from bare, intensively cultivated, or compacted soil. Surface runoff then carries them through fields and drainage ditches into nearby waterways. Steep slopes, vulnerable soils, livestock poaching, damaged banks, and intense rainfall all increase the risk. Deforestation and the loss of woodland, hedges, and bankside vegetation make matters worse. Without roots to stabilise the soil and vegetation to filter runoff, more material can enter the water. Urban Runoff and Stormwater Management Failures Roads, roofs, paved surfaces, and compacted ground prevent rainwater from soaking naturally into the soil. The resulting runoff can erode banks and carry road dust, construction soil, organic waste, and other material into waterways. Natural Hydrological Factors and Low-Flow Zones Sediment naturally settles where water loses speed. Locks, weirs, dams, bridges, or simply areas where the river widens and flattens can trigger sedimentation. Floods may carry large quantities of new material, which settles as water levels and flow speeds fall. Seasonal low flows, drought, and tidal changes can further affect where sediment collects, making local hydrological assessment essential before choosing an intervention. Best Practices for Preventing Siltation 1. Riparian Buffer Zones and Vegetation Management Sedimentation can be beneficial in the right locations. Riparian buffers, such as strips of grass, shrubs, trees, or reeds, can slow runoff, trap sediment before it reaches the water, and stabilise banks. It’s crucial to use native plants, matching species to local soil, water levels, and habitats. 2. Watershed-Level Soil Conservation Techniques Dredging a single waterway section isn’t much use if sediment continues to arrive upstream. It’s more effective to take a comprehensive view of a water system, restoring wetlands, swales, and small retention features, stabilising banks, and considering flood risks. Such interventions require close collaboration between farmers, councils, developers, and waterway managers. Often, it involves tracing sediment back to its source before investing in major engineering works. 3. Installing Sediment Traps and Silt Curtains Sediment traps can intercept material at drainage outlets and tributary entrances. They must be positioned where accumulated material can be inspected and removed safely, as they will eventually fill and stop working if not maintained. Silt curtains serve a different purpose, temporarily containing suspended sediment during dredging or construction work. 4. Sustainable Agricultural Practices A lot of the sediment in rivers comes from agricultural land. Practices like no-till farming, cover crops, crop rotation, and contour cultivation can minimise runoff, preventing soil from being washed away. This doesn’t just benefit the local river. It keeps the nutrients in the soil for crops. However, each piece of farmland should be carefully evaluated based on the farm’s soil, slope, and crop system. How to Control Existing Sediment Build-Up Lower-Impact Dredging Techniques Dredging is the primary way to deal with heavy sedimentation. There are several types: Mechanical dredging uses excavators, grabs, or buckets to remove sediment from the waterway physically. Hydraulic dredging uses pumps to extract sediment as a water-based slurry for dewatering or disposal. Cutter suction dredging uses a rotating cutter to loosen compacted material before pumping it away. Water injection dredging uses low-pressure water to fluidise fine sediment so natural currents can disperse it. Plough dredging uses a submerged blade to move sediment to a collection point or deeper water. Targeted dredging focuses on removing material only where it is causing a genuine problem. It should always be accompanied by upstream prevention, or deposits can quickly return. All dredging activities must be done with the relevant permissions. Read more about Mechanical Dredging vs Hydraulic Dredging. Hydraulic Flushing and Current Deflectors Hydraulic flushing uses higher flows to remobilise deposited material. Current deflectors are a separate method used to concentrate or redirect flow through areas prone to deposition, helping carry sediment downstream. Both approaches require site-specific assessment because remobilised sediment may cause erosion or deposition elsewhere. Monitoring and Detecting Siltation Early Key Indicators of Sediment Accumulation Sediment can accumulate fast. That’s why it’s crucial to identify the signs early. These can include: Reduced water depth and more frequent boat grounding. Visible bars, shoals, or deltas near tributaries and outfalls. Slower drainage or water backing up around structures. Increased turbidity after rainfall. New plant growth in previously open water. Blocked culverts, sluices, screens, or lock approaches. Repeated deposition in the same locations after removal. Changes in bank erosion or channel direction upstream. Using Modern Technology for Bathymetric Mapping Bathymetry is the measurement and mapping of underwater depth and bed shape. It’s crucial to understanding how changes in sediment are affecting a waterway. Professionals use echo sounders or sonar alongside GPS positioning to conduct hydrographic surveys. Combined with aerial imagery, the resulting data can help identify where dredging is necessary, how interventions affect the wider system, and where problems are beginning to emerge. A Long-Term Approach to Waterway Health with The Rothen Group Effective sediment management is rarely a one-off task. It requires controlling upstream sources, stabilising banks, monitoring changes, and using targeted dredging where deposits are already causing problems. The Rothen Group provides specialist dredging, bank protection, habitat restoration, and waterway maintenance services. From preventative work to targeted sediment removal, we can help protect your waterway for the future. Contact our team to discuss your project.

How Green Practices are Shaping Canal Management The UK's canal system is a vital part of the nation's industrial heritage, but its significance has evolved over time to become much more than a historical relic. Today, canals serve as important environmental and recreational assets, playing a key role in biodiversity, water management, and community engagement. As environmental concerns become increasingly important, sustainable canal maintenance has emerged as a crucial aspect of managing these waterways. Environmentally friendly canal maintenance practices are essential to ensuring the long-term health and functionality of canals while minimising their ecological impact. In this article, we explore how green practices are shaping the future of canal management, from reducing the carbon footprint of maintenance operations to promoting biodiversity and habitat restoration along the waterway corridors. These initiatives are setting new standards for sustainable canal management, ensuring that these historic structures continue to provide ecological and social value for generations to come. The Importance of Sustainability in Canal Management Sustainable canal management focuses on minimising environmental impact while maximising the ecological benefits of maintaining and improving canal systems. These waterways are vital for supporting biodiversity, managing water resources, and providing public recreation opportunities. By incorporating sustainable practices, canal managers can protect and enhance these functions while reducing the negative consequences of traditional maintenance approaches. Sustainable canal maintenance contributes directly to climate resilience and environmental preservation. By integrating eco-friendly practices, such as renewable energy, low-impact dredging, and biodiversity-friendly vegetation management, canals can mitigate the effects of climate change, reduce carbon emissions, and support a wide range of ecosystems. One of the most significant benefits of sustainable canal management is its ability to support climate resilience. Canals serve as natural water management systems, helping to regulate water flow, prevent flooding, and support diverse ecosystems. By maintaining healthy canal systems, we can enhance their ability to adapt to changing weather patterns and rising water levels. In addition, sustainable canal management promotes biodiversity by creating and maintaining habitats that support wildlife. Enhancing natural habitats along canal towpaths, such as planting wildflowers and reeds, provides shelter and food for pollinators, birds, and other species. This not only contributes to local biodiversity but also helps strengthen ecological networks across regions. For example, in many parts of the UK, towpaths along canals have been transformed by our team into green corridors that support both wildlife and local communities. Enhancing these natural habitats not only improves biodiversity but also offers local residents and visitors a more pleasant environment to enjoy. Green Practices in Canal Maintenance In recent years, sustainable canal maintenance has evolved to include a wide range of green practices that prioritise the environment while maintaining the functionality of the waterways. From renewable energy to eco-friendly dredging techniques, these practices represent a shift toward more environmentally responsible management approaches. Renewable Energy Solutions One of the key strategies for reducing the carbon footprint of canal maintenance is the integration of renewable energy sources. Canal operators are increasingly adopting solar power and other renewable energy solutions to power boats, equipment, and canal-side facilities. Here at The Rothen Group, solar-powered electric boats are becoming more common for maintenance operations, allowing for quieter, cleaner, and more efficient maintenance work. By harnessing the power of the sun, these boats eliminate the need for fossil fuels, reducing greenhouse gas emissions and minimising pollution in the water. In addition, solar installations along the canal's infrastructure, such as solar lights and charging stations further reduce the environmental impact of ongoing operations. Eco-Friendly Dredging Techniques Dredging is an essential part of canal maintenance, ensuring that water levels remain navigable by removing silt and sediment buildup. However, traditional dredging methods can be disruptive to aquatic life and ecosystems. Eco-friendly dredging techniques offer a way to minimise this disruption while maintaining the waterway’s functionality. When dredging is carried out without careful consideration, it can disturb fish populations, uproot aquatic plants, and release harmful substances trapped in the sediment. Eco-friendly dredging methods focus on reducing these impacts by using techniques, such as precision dredging, which targets only the areas that require sediment removal. This reduces the overall disturbance to the ecosystem, preserving important aquatic habitats while still achieving the desired maintenance goals. In addition to minimising environmental impact during the dredging process, sustainable canal maintenance practices emphasise the reuse of dredged materials. Instead of simply discarding the dredged silt, it can be repurposed to benefit the environment. In many UK canal projects, dredged silt has been repurposed to create wetland habitats along the banks of canals. These wetlands provide critical habitats for a variety of wildlife, including birds, amphibians, and insects. Not only does this approach prevent the need for landfilling the dredged material, but it also enhances biodiversity and stabilises canal banks. These newly created wetland zones act as natural buffers against flooding and improve water quality by filtering pollutants. Vegetation and Biodiversity Management Sustainable canal maintenance extends to managing the vegetation that grows along the banks of the canals. Vegetation plays a crucial role in stabilising soil, preventing erosion, and supporting biodiversity. However, it must be managed carefully to avoid overgrowth that could obstruct waterways or damage canal infrastructure. Sustainable vegetation management involves selective trimming to remove invasive species or overgrown plants while leaving native species intact. By carefully controlling which plants are removed, canal managers can maintain the delicate balance between keeping the waterway navigable and promoting biodiversity. In addition, planting native species, such as wildflowers and reeds, along canal banks is a key part of sustainable canal maintenance. Native plants are better suited to the local environment, requiring less water and maintenance than non-native species. Additionally, they provide essential habitat and food sources for pollinators, birds, and other wildlife. In several of our canal management projects across the UK, we have focused on planting wildflowers and reeds to stabilise canal banks naturally, which not only provides ecological benefits but also enhances the natural beauty of the waterways. Green Towpath Initiatives Towpaths are integral parts of canal systems, providing access for both maintenance crews and recreational users. Ensuring that towpaths are maintained sustainably is key to reducing environmental impact. Towpath improvement projects are increasingly turning to eco-friendly materials, such as recycled aggregate and permeable surfaces. Permeable surfaces allow rainwater to pass through, reducing runoff and helping to prevent flooding. These materials also support better water management by allowing natural filtration, which can improve water quality in the canal. Several of our canal restoration projects have utilised recycled materials to upgrade towpaths, making them more durable, accessible, and environmentally friendly. For example, recycled aggregate has been used to resurface towpaths, reducing the need for new raw materials and helping to lower the carbon footprint of these improvement projects. Another excellent example of green towpath initiatives is the installation of more electric charging stations along popular canal routes. As electric boats become more prevalent on UK canals, the infrastructure needed to support them must expand to allow boaters to power their vessels using renewable energy sources, further reducing the carbon footprint of canal navigation. The Rothen Group – Embracing Green Practices to Transform Canal Management Sustainable canal maintenance is transforming the way the UK manages its historic waterways. By integrating eco-friendly practices, such as renewable energy solutions, eco-friendly dredging techniques, and biodiversity-focused vegetation management, we are proud to be working with canal operators to ensure that these vital waterways remain functional and environmentally sound for future generations. From solar-powered workboats to wetland habitat creation using dredged materials, the shift toward sustainable canal maintenance offers numerous environmental benefits, including enhanced biodiversity, improved water quality, and reduced carbon emissions. By continuing to adopt green practices, the UK’s canal system can remain a valuable environmental resource while promoting sustainability in waterway management. To find out more about the future of canal management and how we're passionate about embracing sustainable practices that prioritise both environmental health and human enjoyment, please contact our team today.

Waterways, including rivers, lakes, streams, and canals, are integral to the UK's environment and society. They support diverse ecosystems, provide water for drinking and agriculture, offer recreational opportunities, and are crucial for transportation and commerce. Maintaining these waterways, especially during the summer months, is essential to ensure their health and sustainability. This article will explore the importance of waterways, the challenges they face in the summer, and effective strategies for their maintenance. Introduction to Waterways and Their Ecosystems Waterways encompass a variety of water bodies, each playing a unique role with rivers, lakes, streams, and canals each contributing differently to the environment and community: Rivers are large natural streams of water that flow toward seas or oceans. They are vital for transporting nutrients, supporting aquatic life, and providing habitats for various species. Rivers also play a critical role in shaping landscapes through erosion and sediment deposition. Lakes are substantial, inland bodies of standing water which can be either natural or man-made. They are important for maintaining local hydrology, supporting diverse ecosystems, and providing resources for drinking water, irrigation, and recreation. Streams are smaller watercourses that typically feed into rivers. They are crucial for biodiversity, offering habitats for a range of aquatic and terrestrial species. Streams also contribute to the hydrological cycle and groundwater recharge. Canals are man-made waterways constructed for navigation, irrigation, or drainage. They have historically played significant roles in transportation and agriculture. Modern canals also support recreational activities and wildlife habitats. Maintaining these waterways is crucial for several reasons: Biodiversity: Healthy waterways support a wide range of plant and animal species, contributing to overall biodiversity. Water Quality: Proper maintenance ensures clean water, which is essential for drinking, agriculture, and sustaining wildlife. Recreational Use: Well-maintained waterways offer recreational opportunities such as boating, fishing, and swimming, enhancing community well-being. Economic Value: Waterways support various economic activities, from tourism to fishing, contributing to local and national economies. Challenges Waterways Face in Summer Summer poses unique challenges for maintaining waterways due to various environmental and human factors. These challenges include seasonal blooms, lower water levels, increased pollution, and invasive species. Seasonal Blooms Algal Blooms: Warm temperatures and increased sunlight can lead to the proliferation of algae. While some algae are harmless, harmful algal blooms (HABs) can produce toxins that affect water quality, harm aquatic life, and pose health risks to humans and animals. Impact on Water Quality: Algal blooms reduce oxygen levels in the water, leading to hypoxic conditions that can cause fish kills and harm other aquatic organisms. Lower Water Levels Drought and Evaporation: Summer droughts and high evaporation rates can significantly lower water levels in rivers, lakes, and canals. This can concentrate pollutants, reduce habitats for aquatic life, and impair water supply for human and agricultural use. Navigation Issues: Reduced water levels can make navigation difficult, affecting recreational and commercial activities on waterways. Increased Pollution Runoff: Summer storms can lead to increased runoff from urban and agricultural areas, carrying pollutants, such as pesticides, fertilisers, and oil into waterways. This non-point source pollution can degrade water quality and harm aquatic ecosystems. Recreational Pollution: Increased recreational use of waterways can result in litter, oil spills from boats, and other forms of pollution. Invasive Species Spread of Invasive Plants and Animals: Warm temperatures can facilitate the spread of invasive species, which can outcompete native species, alter habitats, and disrupt ecosystems. Examples include the zebra mussel and the floating pennywort. Impact on Native Species: Invasive species can alter food webs and habitat structures, leading to declines in native biodiversity. Best Practices for Waterway Maintenance Maintaining waterways during the summer requires a combination of regular cleaning, managing runoff, controlling invasive species, monitoring water quality, and engaging the community. Regular Clean-Up Regular clean-up activities are crucial for maintaining the health and aesthetics of waterways: Litter Removal: Organise periodic clean-up events to remove litter and debris from waterways and their surroundings. This prevents pollution, protects wildlife, and enhances the visual appeal of the area. Debris Management: Clear fallen branches, leaves, and other natural debris that can obstruct water flow and contribute to algal growth. Proper management of organic matter helps maintain water quality and prevents blockages. Managing Runoff Effective runoff management is essential to reduce pollution and protect water quality: Buffer Zones: Establish vegetative buffer zones along waterways to filter runoff and trap sediments, nutrients, and pollutants before they enter the water. Plants in these zones absorb excess nutrients and stabilise the soil, reducing erosion. Green Infrastructure: Implement green infrastructure solutions such as rain gardens, bioswales, and permeable pavements to manage stormwater runoff. These systems allow water to infiltrate the ground, reducing surface runoff and filtering pollutants. Controlling Invasive Species Controlling the spread of invasive species is vital for preserving native biodiversity: Early Detection and Rapid Response: Regularly monitor waterways for the presence of invasive species. Early detection allows for swift action to prevent their establishment and spread. Mechanical and Biological Control: Use mechanical methods, such as hand-pulling and cutting, to remove invasive plants. Biological control involves introducing natural predators or competitors to reduce invasive species populations. Monitoring Water Quality Regular water quality monitoring helps identify and address potential issues: Routine Testing: Conduct routine water quality testing to measure parameters such as pH, temperature, dissolved oxygen, and nutrient levels. This helps track changes and identify pollution sources. Data Analysis: Analyse water quality data to detect trends and assess the effectiveness of management practices. Use this information to make informed decisions and adjust strategies as needed. Community Involvement and Education Community engagement is crucial for maintaining healthy waterways and we always encourage the following: Volunteer Programs: Encourage local communities to participate in clean-up events, monitoring programs, and conservation projects. Volunteers can play a significant role in maintaining waterways and raising awareness. Educational Workshops: Organise workshops and seminars to educate the public about the importance of waterways and how they can contribute to their protection. Provide resources and information on best practices for waterway maintenance. Collaborative Initiatives: Partner with local organisations, schools, and businesses to promote waterway stewardship, as collaborative efforts can leverage resources and expertise to achieve greater impact. The following are some excellent resources for further reading for those who are interested in being involved in waterway management: Canal & River Trust Offers a wealth of information on maintaining waterways and how individuals can get involved. The website features volunteer opportunities, educational resources, and events focused on waterway conservation. Environment Agency Provides detailed information on water quality monitoring, pollution prevention, and flood management. The agency also offers resources for educational initiatives and community involvement. Wildlife Trusts Focuses on protecting wildlife and their habitats, including waterways. The Wildlife Trusts offer programs and volunteer opportunities aimed at conserving local environments and biodiversity. Freshwater Habitats Trust Dedicated to protecting freshwater ecosystems, this organisation offers resources on monitoring and protecting ponds, rivers, and lakes. They also provide guidance on creating and maintaining healthy freshwater habitats. Preventive Measures and Maintenance Long-term strategies are essential for preventing waterway degradation and ensuring sustainability: Sustainable Landscaping: Encourage the use of native plants and sustainable landscaping practices to reduce erosion, enhance habitat quality, and minimise the need for chemical inputs. Reducing Chemical Use: Promote the reduction of chemical fertilisers, pesticides, and herbicides in agricultural and urban areas. Encourage organic farming practices and integrated pest management to protect water quality. Supporting Conservation Policies: Advocate for and support policies that protect waterways and promote sustainable water management. Engage with policymakers and stakeholders to develop and implement effective conservation strategies. The Rothen Group – Maintaining Waterways Across the UK Maintaining waterways in the summer requires a comprehensive approach that includes regular cleaning, managing runoff, controlling invasive species, monitoring water quality, and engaging the community. By implementing these best practices and preventive measures, we can protect the health and sustainability of our rivers, lakes, streams, and canals. The Rothen Group is committed to ensuring the integrity of the UK's waterways through innovative solutions and collaborative efforts. By working together, we can preserve these vital resources for future generations and support the diverse ecosystems and communities that depend on them. To find out more about our approach and the services we offer, please contact our team today.

Droughts are becoming a normal part of British summers. As of August 2026, almost three-quarters of England is in an official drought due to a combination of very low rainfall and higher temperatures. Much of the news focuses on hosepipe bans, wildfire concerns, and the impacts on agriculture. However, in early August, the Environment Agency reported 26 canal navigation closures and 19 restrictions caused by water shortages. The previous year points to a recurring problem. At the peak of the 2025 drought, around 20% of the canal network temporarily closed, and seven in ten surveyed boaters said they could not navigate as planned. In this article we'll explore: How Drought Impacts the UK’s Canal Network How Drought Affects Boating and Canal Holidays Ecological and Environmental Consequences Structural Risks to 200-Year-Old Infrastructure The Economic Ripple Effect on Tourism and Local Businesses How Canals Can Support National Water Resources Protecting the Canal Network Through Hotter, Drier Summers Frequently Asked Questions How Drought Impacts the UK’s Canal Network Canals continuously lose water, even when few boats are moving. Rainfall is needed throughout the year to replenish the reservoirs, streams, and other sources feeding the network. When rainfall stops or slows, the canal network starts to drain. Dropping Water Levels and Reservoir Supplies Prolonged periods of low rainfall reduce the amount of water entering canal-feeding reservoirs. Unlike rivers, water isn’t constantly moving in a canal. But it does move downhill via locks; heavily locked routes require especially large and reliable supplies. Usually, canal managers can replace lost water by releasing it from reservoirs, but when reservoir levels fall critically low, they have few options. In summer 2026, England’s reservoir storage fell by 16% during July, the largest July reduction in raw water storage for at least 30 years. How Evaporation on Hot Summer Days Contributes It’s not just water lost to locks. Continually hot days cause direct evaporation from the water surface alongside transpiration from bankside plants. The Canal & River Trust estimates that canals can lose as much as one inch of water through these processes on a hot summer day. Considering that by mid-July 2026, the UK had already experienced more days above 30°C than during the whole of 1976, it’s not hard to see how it can exacerbate an already fierce drought. How Drought Affects Boating and Canal Holidays Reduced Lock Hours and Water-Saving Measures Lock usage is one of the most common sources of water loss in canals. Authorities may, therefore, limit lock operation to certain hours, group boats together, or introduce supervised passages to minimise overall water loss throughout the system. Other measures can include pumping water back uphill, lowering canal pounds to their minimum navigable level, and suspending non-essential movements. Canal Closures and Shallow-Water Hazards If water levels get critically low, authorities may close locks, flights, or entire canal sections. Shallow water increases the likelihood of boats grounding, striking submerged objects, or becoming trapped in pounds between locks. Ecological and Environmental Consequences Threats to Aquatic Life Canals are home to fish, insects, and aquatic plants. Warmer water holds less dissolved oxygen, while shallow water heats more quickly. Together, these factors can stress fish and other species. In the worst cases, nutrient-rich, slow-moving water creates favourable conditions for algal blooms, which block sunlight and cause oxygen levels to fall further when algae die and decompose. In severe cases, this can kill fish and other aquatic life across a section of the canal. Canals as Refuges for Wildlife Canals thread their way through cities, farmland, and fragmented habitats, often functioning as wildlife corridors. During a drought, they can be one of the last remaining aquatic habitats when ponds, ditches, and smaller streams have dried out. That means canal managers must balance human needs with wildlife concerns. Even so, the concentration of wildlife in shrinking areas of water can increase competition, disease risk, and vulnerability to low oxygen. Structural Risks to 200-Year-Old Infrastructure Many British canals were built more than two centuries ago using clay-lined beds, earth banks, masonry locks, and other materials that were never intended for a warming world. All of these structures come under immense stress and respond badly to repeated drying and rewetting. Drying Canal Beds, Bank Cracking, and Seepage Leaks Clay-lined canals aren’t watertight even at the best of times. Excessive drying can shrink and crack the clay. When water returns, it may escape through newly formed gaps. Falling levels may also reveal erosion, voids, damaged bank protection, or leakage around locks and other structures. For The Rothen Group, it means professionally inspecting canals, performing targeted repairs, installing piles, and strengthening the existing canal banks. The Economic Ripple Effect on Tourism and Local Businesses Like any thoroughfare, canals support numerous businesses: pubs, cafes, marinas, boat-hire companies, and waterside accommodation, to name a few. Route closures can lead to cancellations, refunds, reduced bookings, and additional costs for repositioning boats. Entire hubs can struggle, and some businesses will not survive. How Canals Can Support National Water Resources Canals are not simply recreational waterways. They serve a vital purpose, supplying water to third parties and acting as established routes for moving raw water between regions. There are even options to expand this role. The Grand Union Canal Transfer would use sections of the canal network to help move raw water towards areas facing future supply shortages. It could be a major drought mitigation strategy. Protecting the Canal Network Through Hotter, Drier Summers Droughts place immense stress on the canal network. Reduced supply and greater evaporation can lead to disrupted navigation, ecological stress, and even closures of stretches of a canal. With England experiencing drought in both 2025 and 2026, investing in regular maintenance and long-term climate resilience has never been more important. The Rothen Group provides specialist canal maintenance, bank protection, piling, grouting, dredging, and habitat restoration services. Whether you need to repair an existing problem or make a waterway more resilient to future extremes, contact our team to discuss the right solution. Frequently Asked Questions Why do canals lose so much water during dry weather? Most water is lost through seepage from ageing canal beds and banks. Evaporation, transpiration, lock use, and leaking gates also contribute. How do authorities manage canal water during a drought? Authorities monitor reservoir levels, restrict lock hours, group boats together, pump water between sections, and repair major leaks. Severely affected stretches may be temporarily closed. Does drought harm wildlife in UK waterways? Yes. Shallow water warms quickly and holds less oxygen, placing fish and other aquatic life under stress. Drought can also encourage harmful algal blooms. How do canals avoid running out of water? Canals are replenished from reservoirs, rivers, streams, groundwater, and pumped transfers. Water levels are carefully managed, although severe drought can still cause shortages. Do canals ever dry up? Yes. Individual sections can become extremely shallow or partially dry during severe drought. Authorities try to retain enough water to protect wildlife and prevent damage to canal beds and locks. Where does the water come from to fill canals? Canal water comes from rainfall-fed reservoirs, rivers, streams, springs, boreholes, and surface runoff. Pumps and transfer systems are also used to move water around the network.

Wier booms and trash screens Trash screens play a crucial role in maintaining the health and functionality of waterways. As simple yet effective devices, they are designed to capture debris and prevent it from entering or clogging waterway systems, such as rivers, streams, stormwater drains, and culverts. By keeping waterways clear of trash, these screens help prevent flooding, reduce pollution, and protect aquatic ecosystems. In this comprehensive post, we take a closer look at the mechanics of trash screens, the various types available, their benefits, and key considerations for selecting the right trash screen for a specific application. How Trash Screens Work Trash screens, also known as debris screens or grates, are physical barriers installed in waterways to intercept and remove debris. These screens are essential for preventing the accumulation of trash, leaves, branches, and other forms of debris that can obstruct water flow and lead to a range of problems, from localised flooding to extensive environmental damage. Waterways are dynamic systems that carry not only water but also everything that enters them, intentionally or unintentionally. This includes natural debris, such as leaves and branches, as well as human-made waste such as plastic bottles, packaging materials, and other pollutants. When this debris is not managed effectively, it can cause significant issues. Problems Caused by Debris in Waterways Flooding: Debris can accumulate and block the flow of water in storm drains, culverts, and rivers, leading to localised flooding. This can damage property, disrupt transportation, and pose a risk to public safety. Pollution: Trash and debris in waterways contribute to pollution, harming water quality and leading to the degradation of aquatic ecosystems. Pollutants such as plastic and chemicals can have long-lasting effects on wildlife and plant life. Damage to Aquatic Ecosystems: Debris can smother aquatic habitats, block sunlight, and disrupt the natural flow of water, which is vital for the health of fish and other aquatic species. Over time, this can lead to a decline in biodiversity and the loss of important ecological functions. Given these potential consequences, trash screens are a critical component of waterway management. They provide a first line of defence against debris, helping to maintain the integrity of water systems and protect the environment. Trash screens are typically installed at the entry or exit points of waterways, such as the mouths of culverts, drainage ditches, or stormwater outlets. As water flows through the screen, debris is captured by the screen’s bars, mesh, or other filtering materials, while the water continues on its course. The choice of materials for trash screens depends on the specific application and the type of debris expected. Common materials include: Metal Grates: Often made from stainless steel or galvanised iron, metal grates are durable and resistant to corrosion. They are typically used in environments where the screen will be exposed to harsh conditions or heavy debris loads. Mesh Screens: Made from fine wire mesh or synthetic materials, mesh screens are designed to capture smaller particles. They are often used in areas where fine debris or sediment is a concern. Plastic or Composite Materials: In some cases, screens may be made from plastic or composite materials, particularly in environments where corrosion is a concern or where the screen needs to be lightweight. The effectiveness of a trash screen is influenced not only by its material but also by its design. Different types of screens are used for different applications, each offering specific benefits depending on the nature of the waterway and the debris it encounters. Types of Waterway Trash Screens There are several types of trash screens, each designed to address specific challenges in debris management. 1. Bar Screens Description: Bar screens are made up of rigid, parallel bars spaced at intervals that allow water to pass through while capturing larger debris. These screens are typically installed at the intake points of drainage systems, culverts, and industrial outflows. Common Uses: Urban Drainage Systems: Bar screens are often used in urban stormwater systems to prevent large debris from entering drains and causing blockages. Industrial Outflows: They are also used in industrial settings where large solid waste may be present in wastewater, preventing it from entering natural waterways. Benefits: Effective for Large Debris: Bar screens are highly effective at capturing large objects, such as branches, rocks, and trash, making them ideal for areas with significant debris loads. Low Maintenance: Due to their simple design and robust construction, bar screens generally require minimal maintenance. They can often operate for extended periods without needing to be cleared. 2. Mesh Screens Description: Mesh screens are made from fine wire mesh or synthetic materials, designed to capture smaller particles that bar screens might miss. These screens are used in situations where finer debris, such as leaves, small plastic particles, or sediment, poses a risk. Common Uses: Stormwater Systems: Mesh screens are commonly installed in stormwater systems to capture fine debris that could otherwise enter and clog the system. Natural Waterways: In natural waterways, mesh screens help protect aquatic ecosystems by preventing small pollutants from entering rivers, streams, and lakes. Benefits: Effective for Smaller Debris: Mesh screens can capture finer particles that might pass through bar screens, providing an additional layer of protection for waterway systems. Prevents Blockages: By capturing small debris before it enters the drainage system, mesh screens help to prevent blockages and maintain the flow of water. 3. Self-Cleaning Screens Description: Self-cleaning screens are equipped with mechanical or automated systems that remove collected debris from the screen’s surface. These systems typically involve rotating brushes, rakes, or other mechanisms that continuously clear the screen, ensuring that it remains unobstructed. Common Uses: High Debris Areas: Self-cleaning screens are ideal for locations where debris accumulation is frequent and heavy, such as in urban waterways or near industrial discharges. Unattended Operations: These screens are particularly useful in remote or unattended sites where regular manual cleaning would be impractical or costly. Benefits: Reduced Manual Maintenance: Self-cleaning screens significantly reduce the need for manual cleaning, saving time and labour costs. Continuous Operation: By automatically clearing debris, these screens ensure that water continues to flow without interruption, reducing the risk of flooding or blockage. 4. Inclined Screens Description: Inclined screens are installed at an angle, allowing gravity to assist in the removal of debris. As water flows over the screen, debris is captured and slides down the incline to be collected or washed away. These screens are often used in river intakes and stormwater outlets. Common Uses: River Intakes: Inclined screens are used to protect pumps and other intake structures from being damaged by debris. Stormwater Outlets: These screens help prevent debris from entering stormwater systems and causing blockages during heavy rainfall. Benefits: Effective Debris Removal: The inclined design of these screens allows for efficient debris removal with minimal energy use, relying on the natural flow of water and gravity. Low Energy Consumption: Inclined screens require little to no external power, making them an energy-efficient solution for debris management. Benefits of Using Trash Screens Trash screens provide a range of benefits, from environmental protection to cost savings. By preventing debris from entering and clogging waterways, they help maintain the health and functionality of these systems. Environmental Protection Trash screens play a crucial role in protecting the environment by reducing pollution in waterways. By intercepting trash and debris before it enters rivers, streams, and lakes, these screens help maintain water quality and protect aquatic habitats. Prevention of Pollution: Trash screens capture harmful pollutants, such as plastics and chemicals, that would otherwise contaminate water bodies. This helps maintain cleaner waterways and reduces the impact of human activity on the environment. Protection of Aquatic Habitats: By preventing debris from entering aquatic habitats, trash screens help preserve the natural environment, ensuring that fish, plants, and other wildlife can thrive. Flood Prevention One of the most significant benefits of trash screens is their ability to prevent flooding by reducing blockages in waterway systems. Reduction in Blockages: Trash screens prevent debris from entering drainage systems, culverts, and rivers, where it can accumulate and cause blockages. By keeping these systems clear, trash screens help ensure that water can flow freely, reducing the risk of flooding. Improved Flow Management: During periods of heavy rainfall, trash screens help manage the flow of water by preventing debris from obstructing critical pathways. This helps protect property and infrastructure from flood damage. Maintenance and Cost Efficiency Trash screens offer significant cost savings by reducing the need for manual debris removal and minimising maintenance requirements. Reduced Manual Debris Removal: By capturing debris before it enters the waterway system, trash screens reduce the need for labour-intensive manual cleaning. This can result in significant cost savings, particularly in areas with high debris loads. Lower Maintenance Costs: Trash screens help extend the life of waterway infrastructure by preventing damage caused by debris. This can lead to lower maintenance and repair costs over time, as well as reduced downtime for maintenance operations. Infrastructure Protection Trash screens also play a vital role in protecting waterway infrastructure, such as pipes, pumps, and culverts, from damage caused by debris. Prevention of Damage: Debris can cause significant damage to waterway infrastructure, leading to costly repairs and system downtime. Trash screens help protect these systems by intercepting debris before it can cause harm. Prolonged Lifespan of Systems: By reducing the wear and tear on waterway infrastructure, trash screens help extend the lifespan of these systems, ensuring they remain functional and efficient for longer periods. Considerations for Selecting Trash Screens When selecting a trash screen for a waterway project, several factors need to be considered to ensure the screen is effective and suitable for the specific application. Assessing the Type and Volume of Debris The type and volume of debris in the waterway will determine the most appropriate trash screen design. For example, areas with large debris loads may require robust bar screens, while locations with fine sediment or smaller particles may benefit from mesh screens. Considering the Flow Rate and Water Volume The flow rate and volume of water in the system are critical factors in determining the size and design of the trash screen. High-flow areas may require larger screens or multiple screens to handle the volume of water without causing obstruction. Evaluating Site-Specific Requirements and Constraints Each site has unique requirements and constraints, such as available space, accessibility, and environmental conditions. These factors should be carefully evaluated when selecting a trash screen to ensure it can be installed and maintained effectively. Understanding Maintenance Needs and Capabilities The maintenance needs of the trash screen, including how frequently it needs to be cleaned and whether it can be cleaned manually or requires automation, should also be considered. Self-cleaning screens may be more appropriate in areas where regular maintenance is challenging. Conclusion Trash screens are an essential component of waterway management, providing critical protection against the harmful effects of debris in waterways. By preventing pollution, reducing the risk of flooding, protecting aquatic habitats, and safeguarding infrastructure, trash screens play a vital role in maintaining the health and functionality of water systems. Whether used in urban drainage systems, industrial outflows, or natural waterways, trash screens offer a range of benefits that make them a valuable tool for any waterway management project. By carefully selecting the appropriate type of trash screen for the specific needs of the site, project managers can ensure that their waterways remain clear, functional, and environmentally sustainable. Here at The Rothen Group, we understand that waterway management continues to evolve, yet trash screens will remain a fundamental element of effective and efficient water systems, helping to protect our natural environment and support the infrastructure that communities rely on. To find out more about our capabilities within trash screen supply, maintenance and installation, please contact us today.

Like canals and rivers, ponds require regular dredging to remove buildups of litter and organic sediment. Whether manmade or natural, bodies of water like ponds and lakes can suffer from lack of oxygenated water, overgrowths of bacteria and weeds, and deposits of silt. All of this can have negative environmental impacts and worsen the water quality. If the pond is fed by river channels, these inlets can become choked by debris. Maintenance dredging to remove unwanted organic matter can help restore the organic balance in the water and improve the general environment. It is important that there should be regular dredging of rivers, canals, and lakes. Dredging a pond should be completed with similar regularity. But just like canal dredging or most other types of maintenance, it can be possible to extend the amount of time between necessary dredging work which could help a pond owner make valuable savings. Is dredging a pond important? Water that feeds into ponds tends to carry with it mud, sediments and man-made litter. Parts of ponds, like water egress points, can be more susceptible to debris buildups. When this happens, water flow becomes restricted and the pond begins to deteriorate. For dredging activity to be carried out on a pond, contractors like The Rothen Group (TRG) use specialist dredging equipment. This can include suction dredges, suction pipes, hoppers and diggers. Depending on the size of the pond and the area that needs maintenance, TRG may place certain heavy equipment, like a digger, on the bank of the pond, similar to how they might dredge a river from the river banks. If the pond is too large for this approach, TRG can use a hopper dredger to carry out work without relying on the pond bank. For much bigger dredging projects such as very large lakes, a trailing suction hopper dredger might be used. Once dredge material is in the hopper, it can be transported and disposed of at an appropriate site, in line with UK Environment Agency guidelines. Dredging Prevention To reduce the need for this type of maintenance, it is necessary to try to keep the water clean. Weeds, plant debris and leaves floating on the surface can prevent sunlight from penetrating through to the pond bed, which can hamper the growth of undesirable plants and impact oxygen levels and animal life. Clearing the surface of a pond will help keep the pond’s ecosystem healthy. It will also encourage the faster breaking down of organic matter by animals and microscopic organisms. Another way of putting off the need to dredge a pond is to ensure that the water is well aerated. Aeration is the process of exposing water to air so that elements like oxygen can be absorbed or dissolved into the water. Water can be aerated naturally as streams and rivers flow, but if a pond (or an area of a pond) becomes stagnant, artificial aeration can be a solution. Aeration can be achieved either with a pump moving water or by pumping air into the water. With more oxygen in the water, the risk of an overproduction of phosphates is lessened. Too much phosphate in the water can cause a pond to look and smell unpleasant due to stimulating the growth of unwanted plants and bacteria. While capital dredging is used to expand navigational channels, most dredging performed by TRG is for maintenance purposes. TRG works with the Canal & River Trust to improve UK waterways. For any pond maintenance project, it is best to consult with the experts and you can contact The Rothen Group.

In the UK, the responsibility for maintaining rivers falls to the owner. An individual can own a stretch of river if it runs on or underneath their land. If a river overlaps the boundary of a property, the land owner may be responsible for that too. For a lot of public rivers, it is the Canal & River Trust and the Environment Agency that have the responsibility for their maintenance. There is no single organisation that is responsible for the management of every river, canal, and watercourse across the UK, instead the management falls to several organisations, businesses, charities, contractors, and the landowners themselves. This group approach helps to ensure a cohesive and comprehensive system is in operation throughout the UK. River Maintenance River maintenance is necessary in order to manage flood risks, working with local authorities to keep people and property safe. At different times of year, the risk of flooding may increase, so flood defences must be put in place at canals and rivers. River contractors work with the Environment Agency and the Canal & River Trust. They ensure that river management and maintaining flood safety standards are kept a high priority. The Canal & River Trust is a charity that works with companies like The Rothen Group (TRG) to make sure UK rivers are safe. TRG provides specialist river equipment, competent contractors and river builders who can create and implement an appropriate river maintenance programme. Responsibility for UK rivers involves reporting to the Environment Agency if there is any flooding, blockages, pollution, or badly damaged banks. It is important that river owners do not obstruct the flow of water. They may have to remove fallen trees or debris in order to keep the flow on its natural course. Flooding Using the natural environment to reduce flooding is called soft engineering. It is one of the most important aspects of maintaining a river. Along with soft engineering, embankments are designed specifically with flood prevention in mind. Flood gates and pump stations are also a vital resource against flooding and TRG maintains and repairs these when necessary. It is up to the river owner and the local authority to prevent pollution to rivers. In some cases, studies must be carried out to better understand how pollution is impacting the environment. Local authorities have to work with river owners to prevent further pollution. This great work is vital to the ongoing health and usability of UK rivers. The following are examples of those who are responsible for maintaining and managing rivers across the UK: Riparian owners – Those who own land which has a watercourse or ditch either flowing through or adjacent to the land are responsible for ensuring that water is able to flow freely, and that steps are in place to prevent flooding. County councils – The local county councils are responsible for the management of flood risk from surface water and for managing ordinary watercourses. Although, councils are not always responsible for maintenance or repairs, they are able to advise on potential solutions and points of contact. Town councils – The various town and parish councils and communities throughout the UK play an important role in managing rivers at a local level, especially when it comes to reporting potential issues and flood risks. Local feedback allows effective maintenance and management plans to be created and helps to ensure that the area receives the funding it requires. The Environment Agency – There are many responsibilities which fall to The Environment Agency, especially when maintenance relates to regulating river water flow, reservoirs, and flooding along main rivers. The agency is able to undertake and organise a vast amount of the maintenance which rivers require, but the cost is covered by the Riparian owner if the land is privately owned. In Wales, the equivalent responsibilities fall to Natural Resources Wales. The Canal and River Trust – The trust is responsible for the management of 2,000 miles of canals and waterways across the UK, and they are tasked with water management, preservation of the historic canal system and the restoration of lost waterways. External contractors – Across the UK there are external contractors, such as The Rothen Group, that are tasked with the completion of projects and maintenance plans produced by the various organisations listed above. Through specialist equipment, machinery and an in-depth knowledge of the UK’s waterways, contractors are able to complete many of the tasks which the various authorities above do not have the in-house resources for. While responsibility for UK rivers lies with the owners, The Rothen Group can support with maintaining and repairing their river. The Rothen Group uses a fleet of specialist waterways equipment and highly trained experts to provide the best marine engineering services possible. If you have a river on your property your first port of call should be The Rothen Group. Maintenance It is important that all rivers and watercourses follow an effective maintenance programme, with most waterways requiring at least annual maintenance to ensure water is able to flow freely and that flood risks are managed. However, resources are often limited and so efforts and activities are often focused on areas which would suffer economically or environmentally without the required maintenance. The following are just some of the reasons why river maintenance is so important: Wildlife – If a river is maintained effectively, it creates an excellent habitat for important wildlife, including protected species such as the water vole. By carefully trimming banks, and removing obstructions, the environment surrounding rivers can be enhanced. Flood risk – If water levels are not managed efficiently, land, property and infrastructure is at risk of flooding, so it is important to maintain ditches and culverts and to ensure flood defences are installed when required. Transportation and recreation – Although traffic along rivers is largely recreational, being able to navigate rivers easily is often an important part of supporting the local tourism industry. By removing silt and vegetation build-up and ensuring there are plenty of safe access and mooring points, rivers can help to support the local economy. Agriculture – Many farmers rely on fertile flood plains when growing crops, so it is important that water can be effectively carried from drainage ditches to nearby rivers and streams without any obstacles, especially during periods of high rainfall. Energy – Although the rivers are rarely used to power mills and factories, there are still steep rivers which are used to power important hydroelectric plants. Who to contact if you spot a damaged or dangerous river If you spot a flood, blockage, pollution, a change in the flow of water, damaged riverbanks, or potential dangers along a stretch of river, you should call the 24-hour Environment Agency Incident hotline on: 0800 80 70 60. The team at the Environmental agency will them prioritise their response based on the seriousness of the issue and the risk. Due to budget constraints, the agency may not be able to respond to low-risk incidents immediately, but the information you provide will help to shape a river maintenance plan. The Rothen Group – Maintaining rivers and waterways across the UK Our experienced team are proud to be responsible for the maintenance of many rivers and waterways across the UK, so whether you are a landowner looking to improve water flow, a local council seeking support with flood and surface water management or another important agency, our team are here to help. We undertake projects of every scale, from the removal of obstructions within rivers and the control of aquatic weeds through to the installation and repair of embankments and other flood defence structures. To find out more about our UK wide services, please contact our experienced team today. You benefit from the best guidance drawn from years of experience by contacting The Rothen Group.

Looking after canal locks keeps these vital waterways open to the public. Since the canals were first built, locks have been used to navigate from higher to lower sections of the network. With their strong gates and heavy-duty mechanisms, canal locks are one of the most complicated features of the UK waterways. Canal lock closures aren’t just a nuisance, they can shut down an entire section of waterways. Because they’re constantly exposed to water, without the right lock maintenance, these gates can become stuck. The Rothen Group helps private landowners and waterway bodies repair, renovate, and replace canal locks up and down the country. Here’s what you need to know: What are Canal Locks and Why Maintenance Matters Who Is Responsible for Maintaining Canal Locks Essential Canal Lock Maintenance Tools Hydraulic Tools Used in Canal Lock Maintenance Tools Used for Cleaning and Debris Removal Safety Equipment Required for Canal Lock Maintenance When to Use Canal Lock Maintenance Tools vs Calling a Professional Common Canal Lock Maintenance Mistakes to Avoid How Often Canal Locks Should Be Maintained Canal Lock Maintenance Prevent Major Repairs What are Canal Locks? And Why Maintenance Matters? Canal locks raise or lower the water level in a closed-off section of canal so that boats can go up and down hills. Unlike rivers, canals do not flow naturally downhill. Because they’re intended solely for travel, canals must allow the passage of boats up steep gradients. A lock uses the changing water level to bring the boat up or down to the next section of the canal. Water causes gradual erosion (even in freshwater). If left unmaintained, locks can succumb to rust or rot. Canal gates and their mechanism must be routinely repaired to ensure the waterway remains open and usable. If a single lock becomes damaged, it can cause traffic problems for many miles around. Find out more about why canal locks are so important. Who Is Responsible for Maintaining Canal Locks? Canal locks are maintained by whoever owns the section of canal. Often, that’s a particular waterway authority. They may hire contractors and restoration teams (such as The Rothen Group) to maintain a section of a canal, including any locks. Lock maintenance requires trained professionals experienced in using the right tools. Otherwise, it can lead to further problems and impact the long-term durability of lock systems. Essential Canal Lock Maintenance Tools Canal lock maintenance relies on a mix of traditional tools and specialist equipment to prevent costly canal lock closures and ensure reliable operation. The right tools not only keep locks operating but also extend their lifespan, reducing the risk of costly closures. Hand Tools for Routine Canal Lock Maintenance A lot of maintenance work for locks is done by hand. That means spanners, wrenches, and sockets are used to tighten fittings and perform minor adjustments. Scrapers and wire brushes can also remove rust and debris. Grease Guns and Lubrication Equipment Iron and steel mechanisms can become stiff. Grease guns lubricate moving parts such as hinges and paddle gears to prevent stiffness, corrosion, and mechanical failure. It’s essential to ensure the lock opens whenever a boat comes by. Canal Lock Gate Inspection Tools Locks are built with relative precision. Measuring tools are used to check alignment and wear, noting if any adjustments are needed. Inspection mirrors and torches might also be used for hard-to-see areas, helping identify early signs of rot, damage, or corrosion. Lifting and Handling Equipment for Lock Components Hoists, winches, and lifting frames are employed for heavy gates and parts. The Rothen Group installs new gates made by our team, relying on this equipment for the safe removal and installation of components. Are Hydraulic Tools Used in Canal Lock Maintenance? Hydraulic systems are commonly found in canal lock maintenance. They’re used for heavy lifting and pressing, helpful for large-scale repairs or replacements. These tools can be on-shore or mounted onto a boat. For example, The Rothen Group relies on a fleet of hydraulic dredgers, cranes, and breakers, as part of maintenance operations. They help speed up the repair process, improving efficiency when dealing with heavy gate structures. What Tools are Used for Cleaning and Debris Removal? Dredging equipment for silt and sediment removal is necessary if a lock has begun to fill up. Rakes, nets, and grabs might be used for clearing vegetation and waste. Pressure washers can also clean surfaces and components. However, when it comes to large-scale dredging, a mechanical dredger is required (either a digger or a digger pontoon). What Safety Equipment is Required for Canal Lock Maintenance? Safety equipment isn’t optional. PPE, like gloves, helmets, and high-visibility clothing, is necessary to prevent accidents and injuries. Teams must wear life jackets for working near or over water, especially when manning a digger pontoon. Fall protection and safe access equipment might be required depending on the site location. When to Use Canal Lock Maintenance Tools vs Calling a Professional The real question is, how big is the task? Small maintenance tasks like tightening fittings, clearing debris, or basic lubrication can usually be handled with standard tools. But once you’re dealing with structural damage, heavy components, or waterlogged systems, it quickly becomes more complex. Incorrect repairs can worsen the problem and lead to costly closures. In these cases, professional teams have the equipment and experience to carry out the work safely and ensure the lock remains fully operational. Modern Technology in Canal Lock Maintenance Modern canal lock maintenance is becoming more data-driven. Conditions monitoring and digital inspection records mean waterway authorities can track wear over time rather than relying on reactive repairs. Sensors, for example, can monitor gate movement, stress, and early signs of failure. Maintenance teams can then spot issues before they escalate, scheduling repairs and preventing unexpected canal lock closures. Common Canal Lock Maintenance Mistakes to Avoid One of the most common mistakes is relying on reactive maintenance instead of routine checks. Small issues like minor corrosion or stiffness in mechanisms are often ignored until they become serious faults. Common mistakes include: Skipping routine inspections and maintenance schedules Ignoring early signs of wear, corrosion, or misalignment Using incorrect or inadequate tools for the job Attempting complex repairs without the right expertise Failing to remove debris and sediment build-up Overlooking the lubrication of moving parts Find out how you can report lock damage when you see it. How Often Should Canal Locks Be Maintained? Canal locks should be inspected every 6 months to 1 year, depending on usage. It’s far better and cheaper to schedule routine inspections rather than waiting until something goes wrong. Often, there are issues after the autumn and winter months due to leaves, fallen branches, and frost affecting the lock. Summer months, however, see higher traffic rates, which can increase wear and tear. Read next: Canal Bridge Maintenance: What’s Involved in Preserving Waterway Heritage? Can Canal Lock Maintenance Prevent Major Repairs Yes, in most cases, proper maintenance prevents major repairs altogether. Canal locks rarely fail without warning. Early signs like stiffness, misalignment, or minor corrosion can usually be addressed if picked up during routine inspections. Otherwise, those small repairs can escalate into structural damage, gate failure, or full canal lock closures. If you’re responsible for a lock or section of canal, The Rothen Group can help. From routine inspections to full repairs and replacements, our team provides practical, compliant solutions to keep your waterways operational. Get in touch today to discuss your project.

Bridges are critical pieces of infrastructure. In the UK, many bridges have existed for so long we’ve forgotten how impassable rivers or even streams can be. Only when they deteriorate and fail is their value suddenly appreciated. The consequences of bridge failure can affect transport, waterways, flood management, and public safety. Traffic alone might have to be routed tens of miles. Yet, bridge failure is inevitable. Even well-built bridges deteriorate over time due to traffic loads, weather exposure, corrosion, and water damage. That’s why timely bridge repairs and maintenance services are essential. Below, we explore common types of bridge repairs, typical repair times, factors affecting duration and costs, and what to do when repair is no longer enough. In this article we'll discuss: What Bridge Repair is and Why it's Important Common Types of Bridge Repairs Emergency Bridge Repairs vs Scheduled Maintenance Factors That Affect How Long Bridge Repairs Take How Long Different Bridge Repairs Typically Take How to Minimise Bridge Repair Time and Costs When Bridge Replacement is Better Than Repair What is Bridge Repair? And Why Is It Important? Bridges experience a lot of everyday stress. It’s not just cars or pedestrians that use them; they often have to handle heavy loads from vans, lorries, or even trains. Bridge repair and maintenance aim to extend the operational lifespan and structural safety of the infrastructure. Plus, it puts off the expensive costs of full replacements. But they’re not quite the same. Here’s the difference: Bridge repair involves fixing specific structural or surface issues on a bridge, such as cracks, corrosion, damaged joints, or weakened concrete, to restore safety, stability, and functionality. Bridge maintenance refers to the ongoing inspection, cleaning, servicing, and preventative work carried out to keep a bridge in good condition and reduce the risk of major structural failures or costly repairs. Find out more about canal bridge maintenance. Common Types of Bridge Repairs Structural Crack Repair Structural cracks appear due to thermal expansion (freezing and thawing cycles), overloading, settlement, and water ingress. They’re most commonly found in stone or concrete bridges. Cracks are a major risk. If left unrepaired, the crack will continue to grow. The repair usually involves either an epoxy injection or resin sealing to fill the gap. Carbon fibre reinforcement is also common. The typical repair duration for small cracks is just a few days, whereas it can take several weeks for larger structural repairs. Concrete Spalling and Surface Repairs Spalling occurs when the concrete begins to crumble or flake. It’s caused by freeze-thaw cycles, corrosion, and salt exposure. Eventually, the concrete is completely eroded, exposing reinforcement. The repair requires the concrete to be removed and the damaged section recast. However, protective coatings can be applied if the problem is caught early. It’s a frequent problem on ageing waterway bridges. Bridge Deck Repair and Replacement The bridge deck is the part that vehicles drive on. It can be a tarmac road, rails, or a pedestrian footpath. While some bridge decks are primarily surface layers, damage can still affect safety, waterproofing, and long-term structural performance. Common issues include potholes, waterproofing failure, or surface wear. If the damage is minor, only a partial deck repair is needed, e.g., filling potholes. However, eventually, a full deck replacement is necessary, which can take weeks or months and cause significant traffic disruption. Steel Girder and Beam Repair Steel is at the heart of many bridges. It’s the rigid frame that keeps everything standing, especially in modern bridges. However, while steel is strong and long-lasting, it can succumb to corrosion, fatigue cracking, or impact damage. The treatment involves welding, plate bonding, or, in the most extreme cases, section replacement. Due to the load-bearing nature, steel girder and beam repair is rarely quick, ranging from a few days to months. Expansion Joint Repair Expansion joints hold the various parts of the bridge together. They’re a natural point of weakness but are designed to allow the materials to expand and contract safely when conditions change. However, water leaks, noise (think creaking and groaning), or uneven surfaces are all signs of failure. The typical repair timeframe ranges from days to 1-2 weeks. Bearing Replacement Bridge bearings are structural components placed between a bridge’s superstructure (deck, girders) and substructure (piers, abutments). Their role is to transfer loads while allowing controlled movement and rotation. They fail due to corrosion, age, and excessive movement. But replacing them isn’t easy. It can require lifting sections of the bridge, and takes several days to weeks, depending on the bridge size. Emergency Bridge Repairs vs Scheduled Maintenance The main difference between emergency repairs and scheduled maintenance is the urgency and goal. One is reactive; the other is preventative. Emergency repairs are common after storm damage, vehicle strikes, and sudden structural defects, whereas scheduled maintenance involves planned inspections and routine improvements. If possible, maintenance is preferred: it costs less and causes less disruption. Factors That Affect How Long Bridge Repairs Take Bridge repairs must always be completed as quickly as possible. But certain problems cannot be rushed. The speed of repairs depends on: Bridge size and complexity. Larger or more complex bridges typically require longer repair times. Extent of structural damage. Minor surface issues can be repaired quickly, while major structural problems may take weeks or months. Weather and site access. Poor weather or difficult access over roads and waterways can delay repair work. Traffic management requirements. Lane closures, diversions, and safety measures can slow down repair schedules. Specialist equipment and inspections. Some projects require temporary supports, heavy lifting equipment, and structural testing before reopening. How Long Do Different Bridge Repairs Typically Take? How long different types of bridge repairs takes depends on a the type of repair, typically: Repair Type Typical Duration Crack repair 1 day–3 weeks Concrete spalling repair Several days–weeks Expansion joint repair 2 days–2 weeks Steel beam repair Several days–months Bridge deck resurfacing Days–weeks Full deck replacement Several months Bearing replacement Several days–weeks How to Minimise Bridge Repair Time and Costs Routine maintenance and inspections are the best way to speed up repair times. It means when damage occurs, it’s usually mild-to-moderate and thus can be fixed quickly. The other factor is working with experienced bridge maintenance service providers. They understand the complexity of the situation, using modern repair techniques to restore bridges safely and efficiently. When Is Bridge Replacement Better Than Repair? Bridge repair isn’t always possible. If the bridge has experienced repeated failures or severe structural deterioration, then repair might cost more, take longer, and be more disruptive than a total replacement. Most bridges have a lifespan built in. Even with excellent maintenance, key structural components will eventually begin to fail. Engineers will assess the safety, remaining lifespan, and long-term maintenance costs to determine if a replacement is worth it. For more complex bridge repair and maintenance work, it’s important to work with an experienced contractor. The Rothen Group supports bridge and waterway infrastructure projects across the UK. Learn more about our Bridge Repair, Inspection and Maintenance services or explore our Design and Build capabilities for larger infrastructure projects.

The UK’s waterways are growing in popularity. Their link with healthier living, whether through mental wellbeing or exercising along the banks, has meant that more and more people are spending time by rivers and canals. They also continue to be used for construction and industry, often transporting goods to places that are largely inaccessible by road. However, canals and rivers are susceptible to a build-up of weeds, which can have damaging effects on the health of the water, and make navigation extremely challenging for canal boats. This guide will outline the main problems associated with weeds, and what the solutions are for those tasked with keeping our beautiful waterways clear. The problem with aquatic weeds Some aquatic weeds are an invasive species, and need removing to reduce spreading. This is important for several reasons: Large areas of weeds will reduce effective drainage They can cause rubbish to get stuck at key chokepoints, such as under bridges They can block out light that stops other, native species of weed from growing Weeds can smell (particularly in hot weather) Restrict navigational traffic trying to move through waterway as weeds get stuck around propellers The balance between invasive species of weed and native species is currently tipped in favour of the invasives, and aquatic vegetation management helps to retain that balance. Weeds or reeds? It is important to emphasise the distinction between weeds and reed, which can often be confused. Reeds tend to be upright (5-6ft tall), and found along waterway banks, whereas weeds are a mix of floating/growing vegetation that float on the surface of the water or grow upwards from the water bed. Weeds such as duckweed tend to be much more aggressive, removing oxygen from the water which can lead to a reduction in biodiversity. This is why duckweed control is essential to maintaining healthy waterways. Find out more about common reed plant species. How are weeds removed? Different types of weeds grow in different ways, from floating on top of the water to form a blanket-like appearance, or growing up from the water bed. This requires a varied approach to canal maintenance, with different equipment and methods available for specific applications: Underwater weeds – underwater weed cutters are used to cut the strands of the weeds growing up from the water bed, which then allows it to be scooped up by weed baskets. These are then disposed either on to the bank for removal, or into hoppers (a container for loose material, which essentially acts as a floating skip). Floating weeds – aquatic weed cutters are used to remove floating weeds. There is a large range of aquatic cutters available – from amphibious models to boats that sit on the surface of the water. Owing to the flexibility offered by being able to attach different cutting heads and baskets, and depending on the type of weed removal, floating aquatic vegetation cutters are most commonly used along UK waterways. They are especially effective for duckweed removal. Reed bed maintenance – reed beds are usually created as part of a drainage scheme, or a habitat creation project. Amphibious boats are best suited to this form of waterways maintenance. Reeds – removing reeds requires the use of a specialist reed cutting machine. However, great care must be taken when cutting reeds, as between March and September, birds and water voles will often create nests in this habitat. While it is still important to periodically clear reeds, this should be done during the autumn/winter months, when there will be minimal disruption to wildlife. It is important to note that aquatic weed cutters need to be delicately and carefully operated, and must therefore be operated by an experienced RYA Helmsman. When is the best time for weed removal? Maintenance of the canal system & inland waterways in the UK can be challenging, especially when it comes to weed removal. Waterways are at their busiest during the summer months, but this is also the time when weeds flourish. As such, weed removal requires a careful approach, liaising with the Canal & River Trust or Environment Agency to ensure minimum disruption. The amount of time it takes to clear weeds varies drastically, and can take anything from one day to several months. For example, clearing a 2 kilometre stretch may take one week in a year, but a hot spring and early summer will make the weed growth bloom, doubling the amount of time it takes in the following year. Further factors that affect how often canal maintenance is required include: Heat – This isn’t just related to air temperature, but can be affected by warm waste water entering the waterways from industry. Location – Nearby agricultural/commercial industry can often leech nutrients into waterways, thus stimulating greater weed growth. It is also important to note that, while the majority of weed clearance takes place along the UK canal network, there are other bodies of water than require such work. Anywhere that weeds can flourish, such as lakes or ponds, rivers, and drainage ditches, will require some form of maintenance. Final considerations The historic nature of the UK’s canal system means that there are various restrictions in how machinery can be deployed. For example, weight restrictions prohibit heavy machinery from being used on towpaths, and transporting waste material from site can often prove a logistical challenge. To ensure that maintenance is carried out effectively, it is important to engage with experts, such as The Rothen Group, who can call on a wealth of experience, with a diverse fleet that can be mobilised across the UK. Information on our weed cutting capabilities can be found on our website.

Canals and locks are vital components of the UK's waterway network, serving as key routes for transportation, leisure, and tourism. They have played a pivotal role in the nation's history, facilitating trade, and connecting communities and to ensure their continued functionality and safety, it's crucial to promptly report any damage or issues that may arise. In this comprehensive guide, we'll explore the process of reporting canal and lock damage in the UK, identifying responsible authorities, common types of canal and lock damage, their implications, and the role of The Rothen Group team in providing solutions. Who to report to canal and lock damage to and who is responsible? Canal & River Trust The Canal & River Trust is a large charity responsible for maintaining over 2,000 miles of waterways in England and Wales. They are the primary authority to contact for reporting canal and lock damage within their jurisdiction, and the Trust has a user-friendly online reporting system that allows individuals to submit details of damage, including photographs and location information. The Canal & River Trust is responsible for maintaining and managing many of the UK's historic canals, including the Grand Union Canal, Leeds and Liverpool Canal, and many others. They ensure that these waterways remain navigable, safe, and accessible for boaters, walkers, cyclists, and anglers. Environment Agency The Environment Agency oversees navigable rivers in England and Wales, which may include canals connected to these rivers. For canals and locks falling under the jurisdiction of the Environment Agency, such as those on major rivers like the Thames, Severn, or Trent, reporting any damage should be directed to them. The Environment Agency is also responsible for flood risk management, navigation, and environmental protection along these waterways. Scottish Canals In Scotland, Scottish Canals manages the country's network of canals and locks. The scenic canal network includes the Caledonian Canal, the Forth & Clyde Canal, and the Union Canal. Their mission is to ensure these waterways are operational, attractive, and sustainable, so if you encounter damage on the Scottish canal system, contact Scottish Canals for reporting and assistance. Waterways Ireland For canals and locks in Northern Ireland, Waterways Ireland is the authority responsible for their maintenance and management. If you come across damage in this region such as the Shannon-Erne Waterway and the Lower Bann Navigation, it is important to report it to Waterways Ireland promptly. Common types of damage and their implications 1. Lock gate damage Lock gates are critical components of canal systems, allowing boats to navigate water level changes. Damage to lock gates, such as cracks, leaks, or malfunctioning mechanisms, can disrupt navigation and pose safety hazards, so immediate repair is essential to prevent accidents and minimise water loss. Read more about the tools used for canal lock maintenance. 2. Bank erosion Bank erosion is a common issue along canals. It can result from heavy rainfall, increased boat traffic, or natural processes. Erosion can also lead to path collapse, compromising the stability of towpaths and endangering users. Timely repairs and erosion control measures are necessary to maintain towpath integrity. 3. Water leakage Water leakage from canals can deplete water levels, disrupt navigation, and harm aquatic ecosystems. Leaks may occur due to deteriorating infrastructure, cracks in canal walls, or damaged valves. Detecting and repairing leaks promptly is vital for conserving water resources and ensuring safe navigation. 4. Vegetation overgrowth Excessive vegetation growth within canals can impede boat movement and impact water quality. Invasive species like floating pennywort can spread rapidly, causing blockages. Reporting overgrown vegetation helps authorities implement control measures to preserve waterway health. 5. Structural damage Structural damage to canal banks, retaining walls, or bridges can jeopardise the safety of users and disrupt navigation. Cracks, subsidence, or material degradation must be reported for prompt evaluation and repair. Find out more about canal bridge maintenance. The implications of delayed reporting Failure to report canal and lock damage promptly can lead to a range of negative consequences: 1. Safety risks Damaged locks, towpaths, or structures pose safety risks to canal users, with accidents resulting from unreported damage potentially causing injury or even loss of life. 2. Environmental impact Water leakage, erosion, and vegetation overgrowth can harm local ecosystems, and delayed reporting may lead to more extensive environmental damage and increased restoration costs. 3. Navigational disruptions Navigation through damaged locks or waterways becomes challenging and eventually impossible. Delays in reporting affect boaters, impacting leisure activities and commercial transport. 4. Increased costs The longer damage remains unreported, the more extensive and costly repairs become. Early reporting can help minimise repair expenses. The Rothen Group – Maintaining, repairing, and restoring canals across the UK The Rothen Group plays a vital role in repairing canal and lock damage. As a trusted contractor specialising in waterway maintenance and restoration, we offer a range of services to address damage and ensure the longevity of the UK's canals and locks. Our service begins with a comprehensive assessment the of canal and lock damage, which ensures our team identify the extent of the issue to formulate an effective repair strategy. Our skilled teams are equipped to undertake a wide range of restoration and repair projects. Whether it's repairing lock gates, stabilising eroded banks, or controlling vegetation overgrowth, we provide the expert solutions needed. As canal repair specialists, we always emphasise the importance of preventive maintenance to identify and address potential issues before they escalate. Regular inspections and maintenance by our team can help prolong the lifespan of waterway infrastructure, and we collaborate closely with waterway authorities, local communities, and conservation groups to ensure our waterways can be used and enjoyed by everyone. Through the expertise and commitment of our team the solutions needed to address canal and lock damage are readily available, to find out more contact our experienced team today.