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[tunnie]

Anyone have any experience of these, been informed that there is one under the garden of my "new new" place which we are in the process of buying.

A quick Google suggests these are a way of controlling water into the surrounding soil? So if we get a major down-pour, water goes into this tank (through top soil I imagine?), can stay there then is slow let out? Rather than saturating the ground?

Anything to look out for?

It's practically brand new, houses finished Nov 2012. 

[Taxi_Driver]

Has it been built on a flood plain then?? Carnt see the reason for one otherwise 

[tunnie]

Has it been built on a flood plane then?? Carnt see the reason for one otherwise 

Nope, no flood plane as far as I know. 

House we were getting to get about mile down road had a flood report done, nothing to note

[tunnie]

That said these were designed apparently as "eco" houses, as solar panels were included from new to heat hot water. Said number of other things were done, but not listed.

[Taxi_Driver]

Has it been built on a flood plane then?? Carnt see the reason for one otherwise 

Nope, no flood plane as far as I know. 

House we were getting to get about mile down road had a flood report done, nothing to note

I dont understand it then......but i havent googled it, just going by your original post.....why do need a tank under your garden to collect the rainfall and slowly release it......if the ground doesnt flood when it rains heavily  I havent got one.....so why does this property need one 

[tunnie]

Further research suggests these also limit impact on drains, reducing the strain. Come across a blog which had for a new build the requirement for this kind of tank too, as there were many houses in the area, this was required to help protect drains from too much water.

GrandmaT lives less than a mile away, never been a flood in Camberley. 

This is from another development, again all about sustained development 

http://www.southampton.ac.uk/estatedevelopment/newsandpublications/currentnewsandarchive/2009/20090706_lsblueboxes.shtml

[albitz]

I would be finding out if I can harvest the water for watering the garden,washing the car etc. nd then having the water bill reduced accordingly.

[tunnie]

I would be finding out if I can harvest the water for watering the garden,washing the car etc. nd then having the water bill reduced accordingly.

Ooo damn good point. Already getting sun to heat the water 

Just been doing some more research on Environment Agency's site, even at "Extreme" Flood, our new house is way outside the boundary of the Blackwater River risk area

[05omegav6]

Might be a communual system especially as the road is probably unadopted... ie the residents pay to maintain the roads/ verges/ greens / lighting etc rather than the council double check if neither the solictor, vendor or estate agents mention it

[tunnie]

Might be a communual system especially as the road is probably unadopted... ie the residents pay to maintain the roads/ verges/ greens / lighting etc rather than the council double check if neither the solictor, vendor or estate agents mention it

It is 

There is a management company for the close, fee paid once a year. That goes into as you say general maintenance, this tank is listed. It's underneath next doors back garden too, the too gardens back onto each other.

My solicitor brought it to my attention, tempted to ring Estate Agents tomorrow. The vendor is a switched on chap, he is a director of the "maintenance company" so he should know about it.

[tunnie]

Found out it serves the whole road too, from the TP1 form:

"Attenuation Tank means the attenuation tank serving
all plots within the Estate and located within the
boundaries of Plots 1 and 2 within the Estate and all
pipes conduits and ancillary apparatus connecting the
Attenuation Tank to the estate road


As it's not adopted by council, guess this is it's main drainage source for drains from the very small close.

[Andy H]

In the "good old days" (TM) (when everyone grew their own vegetables and only toffs had cars) rainwater used to soak into the soil and slowly find it's way into the local watercourse.

Now everyone seems to have a patio and has paved over the front to park cars on. When it rains the water runs straight off and into the nearest watercourse (which then rushes downstream and floods places that never used to have a problem).

Surface water attenuation is intended to capture the water and then release it at a rate that the water course can cope with.

[Varche]

Might be a communual system especially as the road is probably unadopted... ie the residents pay to maintain the roads/ verges/ greens / lighting etc rather than the council double check if neither the solictor, vendor or estate agents mention it

It is 

There is a management company for the close, fee paid once a year. That goes into as you say general maintenance, this tank is listed. It's underneath next doors back garden too, the too gardens back onto each other.

My solicitor brought it to my attention, tempted to ring Estate Agents tomorrow. The vendor is a switched on chap, he is a director of the "maintenance company" so he should know about it.

Why does that set alarm bells ringing. Whatever happened to building away from flood plains and having proper drainage pipe work? 

[tunnie]

Might be a communual system especially as the road is probably unadopted... ie the residents pay to maintain the roads/ verges/ greens / lighting etc rather than the council double check if neither the solictor, vendor or estate agents mention it

It is 

There is a management company for the close, fee paid once a year. That goes into as you say general maintenance, this tank is listed. It's underneath next doors back garden too, the too gardens back onto each other.

My solicitor brought it to my attention, tempted to ring Estate Agents tomorrow. The vendor is a switched on chap, he is a director of the "maintenance company" so he should know about it.

Why does that set alarm bells ringing. Whatever happened to building away from flood plains and having proper drainage pipe work? 

Lol everyone appears to have latched onto flooding 

1) It's not a flood plain.
2) The area has never flooded.
3) It's an adopted road, it does not belong to council, so additional drainage was needed.

Also every member of the close, is a member of the management company. With several of them being directors, being retired I think he had the time

[MR MISTER]

You're not worried at all, are you Tunnie?