[Shop-talk] Tunneling drain pipe down a hill?

[Eric J Russell]

Perhaps you could compromise and dig a series of holes (say 10' apart) and 
try 'drilling' from one to the next. That might help keep the 'drill' 
aligned in both the vertical & horizontal planes.

When we had some septic tank work done at our former residence in 
Massachusetts, the contractor did use a 'water drill' to run a 4" pipe under 
the driveway. He dug a hole on either side of the driveway and shoved the 
pipe under the driveway (~ 10'). I confess I didn't study what he did (plus 
it was 12-13 years ago...) but I do recall he used a garden hose and sort of 
forced the pipe through letting the water wash the dirt/mud back through the 
pipe. So, I would think you might want to start at the bottom of the hill 
and work upwards?

Eric Russell
Mebane, NC
http://home.mebtel.net/~ejrussell