"dutchman" wrote in message
...
Your right on that, as its in a new housing estate. Whereby both banks
come with the property.

Ones of the problems is that the stream was diverted, so they could
built moew houses. But my bets are the stream is trying to get back
to its original course.

It looks like as the most cost effective option is to use wooden
stakes every 750mm and then board up at he back, and rock infill
behind it and the bank. I am told that heavy vaccum tanalised timbers
will last over 10 years.




I would use the pointed angle iron fencing posts, backed by good chain link
fencing, then back filled with rocks. For this, you might find a demolition
taking place where large manageable chucks of concrete could be obtained.
They would last longer with regards to erosion and the limited power even a
torrent would have in trying to dislodge them.

Wooden stakes and boarding will as you realise rot and then the backfill
would be exposed and again washed away

Just a few thoughts. Water is funny stuff AND powerful