Imagine a typical stormy day where the rain pours heavily, and you expect everything outside to be draining away nicely. But instead, you notice water pooling strangely in your garden or at your street corner. It could well be a sign of a collapsed storm drain, a common but disruptive issue that many overlook until it becomes a severe problem. This blog aims to guide you through identifying, addressing, and ultimately preventing a storm drain collapse.
Introduction
When storm drains work, they’re invisible to us. They efficiently channel rainwater and runoff away from our properties and streets, keeping our environments safe and dry. However, when they fail, the effects can be immediate and catastrophic, ranging from minor inconveniences to major flooding and property damage. One of the most severe failures occurs when a storm drain collapses. This typically happens gradually but can sometimes seem sudden due to unseen damages escalating beneath the surface.
Understanding Storm Drain Collapses
Storm drain collapses are often a result of several factors combined, including aging infrastructure, poor maintenance, natural subsidence, or increased traffic loads. The material of the pipes (often older clay or brittle concrete), constant environmental exposure, and aggressive root growth from nearby vegetation also play significant roles in the degradation and eventual collapse of these drainage systems.
Spotting the Signs Early
Early identification is key in mitigating the damage caused by a collapsed storm drain. Key signs include:
- Unexplained, persistent puddles or water pooling in new areas
- Ground subsidence near known drain lines
- Cracking in the surface of tarmac or paving, which can indicate an underground void
- Unusual sounds like gurgling or bubbling coming from the drains during rain
Investigation and Assessment
If you suspect a collapsed storm drain, a closer inspection will be necessary. For safety and effectiveness, this should begin with a visual inspection of easily accessible parts of the drain, such as grates or open channels. Professionals often use CCTV drain surveys for a more in-depth assessment. This involves sending a camera down the drain to check for collapses, blockages, or damage that isn’t visible from the surface.
Practical Measures if You Suspect a Collapse
While professional help is often necessary, there are a few steps you can safely perform:
- Regularly clear out leaves, debris, and other blockages from the surface grates
- Monitor and record any changes in water flow or new water accumulations during rain — this data can be very helpful to professionals
- Avoid heavy machinery or vehicles over known drain areas if you suspect a weakness
Calling in the Professionals
When a storm drain collapses, the repair process can be complex and should typically be handled by professionals. They will determine the best method of repair, which might involve trenchless repairs like pipe bursting or slip lining to restore functionality without extensive excavation.
Long-Term Prevention Strategies
Prevention is always better than cure, especially with storm drainage systems:
- Regular maintenance and clearing of drains to prevent build-ups
- Scheduled professional inspections and cleaning, particularly after severe weather
- Consideration of newer, more durable materials if replacements are necessary
- Thoughtful landscaping to avoid planting deep-rooted trees near drain lines
Mitigation for Property Owners
Property owners can take measures to mitigate the risk of damage from a collapsed storm drain:
- Install backwater valves to prevent sewage backflow in case of severe drain failures
- Ensure proper landscaping to facilitate good drainage away from the building foundations
- Regularly inspect the property for signs of water damage or accumulation
Conclusion
A collapsed storm drain can be a daunting problem to face, but with the right knowledge and a proactive approach, it can be managed and prevented. Keeping an eye on the signs and engaging in regular maintenance can make a significant difference. If you find yourself facing potential collapse signs, remember that early intervention by professionals can prevent a full-blown crisis. Take note of any changes in your drainage system’s behaviour, especially after heavy rainfall, and don’t hesitate to reach out for expert assessment and intervention. By staying informed and vigilant, you can ensure that your storm drainage system remains robust and reliable.
