[TowerTalk] going under a drive way

[Jim Lux]

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.
>
> Al
> AB2ZY
>
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 
project.