Went on a service call to a long time customer, for a leak in their front lawn. Walk over to a depression in the lawn, and my foot goes down a ways. The turf is basically holding me up. I hold out my long shovel horizontally ready to fall in, back away and ask the home owner if this is where the cesspool is located. It is not, but I'm still cautious. Turn on the zone and the turf bubbles with water after a full minute or more. I reach thru the turf to find the leak. My hand keeps going down down down. I'm up to my armpit when I find the poly leaking. I can feel a cut on the dead bottom of the poly. OK, time to dig... and dig.... Not very clear in the picture, but that 3/4" poly line is over 24 inches below the sod level. I doubt a machine pulled it THAT low. But no idea WHY anyone would dig that low to run sprinkler line. Homeowner has lived there more than 40 years. Doesnt remember when exactly the system was first installed, probably about 30 years ago he says. He does remember a big tree used to be in that general area. Maybe someone dug under some roots? Why not go around? Maybe when that tree was removed there was a big hole, and the line drooped in or had to be repaired and it was allowed to lay that low before the hole was backfilled. Still boggled why someone would run sprinkler line that deep. It's all beach sand down there after the 5" of top soil. Long Island is a huge sandbar after all. It's not likely that the lawn was built up after the poly was run. I patched the break with two 3/4 x 1" poly couplers and some 1" poly (company doesn't stock 3/4" stuff except the adapter couplers). Basically had my head and shoulders in the hole to slip the couplers into the pipe. Musta looked like Winnie The Pooh with my lower body sticking up out of the ground.