06-11-2010, 02:07 AM
its about 18 inches between layers ... the rock flow layers thickness varies 8-12 inches thick on average.
I was able to excavate into (to square off) a "hill" to add parking space under my shop ( 8' up on stilts). I went 10 feet or so back into the hill. Up to 6 feet deep in spots. Following the natural fissures in the rock splits it nicely.
The jackhammer makes short work of two to three foot post holes too ... I can get a three foot deep by 18" wide in a half hour per post hole or so.
- 6 inches of soil. a foot of rock 18" of soil and so on
I use the rock that comes out of the holes to make garden walls, back fill with he soil that comes out. I toss in a few bags of the Ace house brand soil for good measure. Aces' version has a lot of sand - promotes drainage and comes with nutrients already added - great stuff.
I was able to excavate into (to square off) a "hill" to add parking space under my shop ( 8' up on stilts). I went 10 feet or so back into the hill. Up to 6 feet deep in spots. Following the natural fissures in the rock splits it nicely.
The jackhammer makes short work of two to three foot post holes too ... I can get a three foot deep by 18" wide in a half hour per post hole or so.
- 6 inches of soil. a foot of rock 18" of soil and so on
I use the rock that comes out of the holes to make garden walls, back fill with he soil that comes out. I toss in a few bags of the Ace house brand soil for good measure. Aces' version has a lot of sand - promotes drainage and comes with nutrients already added - great stuff.