We have a manhole in the middle of our back lawn. It is about 10m from the house. In the summer when it is dry, you can see down the 15" dia pipe about 6 feet. At the bottom, there are gullies coming in a different angles, but we suspect that all but one of these are closed/blocked. In the winter, the manhole fills with water, but is usually 2-3' below ground level. In really bad rain (late 2013), that corner of the garden flooded. The water in the hole is slightly brown coloured.
As far as we can tell, nothing drains from the house into this hole. So, is it likely to be part of a soak away system? Does the hole fulfil any purpose? To me, it is just a useful hole into which I can drop a submersible pump when the garden floods in heavy rain.
As far as we can tell, nothing drains from the house into this hole. So, is it likely to be part of a soak away system? Does the hole fulfil any purpose? To me, it is just a useful hole into which I can drop a submersible pump when the garden floods in heavy rain.