Tried searching, and came up with a lot of hits on "mole" devices, but they all required a sizable hole dug at the beginning (and end?) of the run and the run seems to have to be straight-line and level: http://tinyurl.com/bqgbsfo
Whatever is putting in that orange stuff seems to be doing it without any holes at either end of the run. It's as if the mole can be directed down, curve under the surface, bore to the other end, and then re-surface.
Or am I missing something?
If not, can anybody hang a name on the device that does this?
I should add that his is totally-idle curiosity. I just went through the conventional process of digging a trench and laying conduit and the job's done.... but it was sooooo messy and labor-intensive that seeing installations like in the first link has me going on how it was done.