Can I build a retaining wall on top of a timber crib retaining wall?

[mattgriff]

Hello

I have recently moved in to a house and the garden needs some work.

Garden is around 10m wide by 10m long and it slopes from the house to the bottom by around 2 or 3 feet.
I'm hoping to level the garden off by building a retaining wall.

my problem is the garden sits around 15ft higher than the land behind and it's retained by a timber crib retaining wall. Not sure why the wall wasn't built higher to level the garden off in the first place but now I'm wondering can I build on top of the timber crib system so I can level the garden off?

 

[Bonni]

Well, it's knowing if the original retaining wall was designed and built to the spec required for it's location etc.. Then if it is, how does the spec change by adding onto the wall? Will it go under it's spec or not matter?

So that's impossible to know or to find out. So it's one of two choices. Completely redesign, replace, and build a retaining wall, or build on top of the existing one and see what happens.