Does a stormwater attenuation tank need maintenance?

Posted by Luke Quentel, on July 10, 2024.

Like any drainage, it will need maintenance. However, it is no different or more arduous than any drainage. The majority of drainage systems will require periodic flushing or some maintenance. Therefore, should form part of your regular maintenance plan.

There are two main types of branches attenuation: inspectable tanks and non-inspectable. For non-inspectable tanks, the maintenance usually involves a good silt trap before the tank.

This is so the maintenance would be emptying out the silt trap periodically and after any large storm event, which may form part of your facilities management plan. If it’s an adoptable tank, it might form part of your water board’s responsibility.

Inspectable tanks though are available for if you need that extra level of maintenance, if you expect it to be a heavy site, it is going to see a lot of silt and a lot of debris. The maintenance can be putting a jet periodically through the run of the tank and giving it a proper flush. Camera inspections are available for inspectable tanks.

Maintenance will be required for all stormwater tanks but the level of such will depend on the type of tank you have and who’s looking after it as well. Whether it is been adopted by your water board, it tends to be a bit stricter than a private company looking after it.


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