- Location
- Limousin/Charentes toad land
Similar problems with some of the drains here. They used only straw backfill over some where the drain was down in the sand under a metre of clay. The clay has completely sealed over. Subsoiling / moling works to some extent but by the time you are deep enough to get through the clay you are in danger if hitting the drain. It's never really dry enough at depth anyway to crack it.
Only way for us is either a new scheme or dig up and re lay with stone backfill. It's just about doable with a mini digger, perhaps do worst bit each year.
Economically it doesn't really add up but nor does leaving it water logged.
Yes, 80 ha of this will take a while