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Leach Rock - Drainage

A functional retaining wall requires drainage of water behind it. Pressure builds over the years that can eventually break the wall. So to meet code a 4" leach pipe is placed at the base, and leach rock is placed on top of the pipe. Landscape paper is placed between the rock and earth to act as a filter. Here's this step in the retaining wall process.

This photo sequence contains 5 frames (so far). Each frame in LANDSCAPE mode is a finite 1024 pixels wide and those in PORTRAIT mode are a fixed 768 pixels wide. The other dimention was left to its own based on the crop. I based the picture size on an email program's display window asuming that the picture would not be automatically resized to fit. This technique kept the file size down, the largest being just less than 400k making it easy to send and receive through email. All photos were taken with a Nikon D80.

Here's the gap behind the wall.

The landscape fabric is placed, overlapping.
That's what filters the dirt from flowing into the leach rock.

The pipe is placed. This is a leach line pipe
with holes on the bottom sides.
The pipe is slightly higher on the far side
as shown here, so the water will flow out.

The rock is placed on top of the pipe. A wood panel is used to hold up the rock
while dirt is placed on the other side. Eventually the panel is removed.
The panel is moved over to the next area and the filling continues.

The ends needed some support. Both sides get the posts
and eventually, brick will be placed to hold it in.

Here's the completed drainage/leach rock placement.
I used some old 4x6 boards in the wood pile to seperate the dirt
from the leach rock at the top. Not bad at all, huh?

Different angle.

Now, here you can see the area behind the wall isn't level.
Once leveled back about 15 feet, a concrete pad will be poured.
On it will be a 500 gallon propane tank. The rented 250 gallon tank
will be returned. Then I'll dig out the area starting directly
behind the truck and pour a concrete pad for a 12 x 24 shed.

Leftovers!
Maybe I'll pour them beside the outside shower pad.

LeachRock.zip - 3106059 bytes.