This is cross-posted from the other forum, here...

I'm digging a trench for an electrical conduit in my back yard. And by "I", I mean a couple of hired hands. My guys went pretty deep and hit this thing, breaking it:

http://i111.photobucket.com/albums/n151/tedfeeney/broken%20pipe/BrokenPipe005.jpg

http://i111.photobucket.com/albums/n151/tedfeeney/broken%20pipe/BrokenPipe002.jpg

http://i111.photobucket.com/albums/n151/tedfeeney/broken%20pipe/BrokenPipe001.jpg

What is it? Digalert didn't flag any power or gas lines in my backyard. I think the broken pipe is connected to the black "quick cap" thing on the surface, the end of this pipe in the ground is capped off also, and there's a black plastic bulge still in the ground that appears to be in the middle of whatever this is.

I don't know if it's running into the house or under my foundation. On the wall behind the trench is my master electrical panel, and behind that wall is the laundry room.

I don't know what it's connected to, or what it's supposed to be draining out, or if it's even a going concern. It's buried deep enough that someone put it there for a reason. I've uncovered some odd things while grading the backyard of this house (like a laundry pole being held into the ground with 350 pounds of concrete... that was seriously wild). The house was built in 1918 (it's in Los Angeles, not some perma-frost prone northern clime, if that helps with the ID).

Thanks for any guesses -

Jeff