On 6/29/12 8:54 PM, Al Kozakiewicz wrote:
> That is really tempting, but you have to be careful. Since you can't tell
> how much soil is being washed out relative to the pipe diameter, you could
> end up with a sinkhole. Not some car swallowing monstrosity, but enough to
> cause a pothole and ruined driveway.
Yes indeed.. that's why digging a big hole next to the driveway so you
can see what size crater you are excavating/washing out under the
driveway is important.
What about some sort of horizontal boring scheme. A big hammer drill
and something that looks like a spade bit or auger for wood, and some
extensions. I can't say I've ever seen this, but at least you might be
able to control the size of the hole, and it's a "do it yourself" scale
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