When I was first starting in this industry I was working at a very large condo/townhouse division (20 acres) where we maintain all the green space around the streets and town homes. This is where I learned to work with 4" pipe. Anyways, I was doing some maintenance work on some stuck heads and I happened to step in a very soft area right by the edge of a street. I knew that about 15 years prior a 4" main had been ran through there, so I thought there might be a pinhole leak so I started digging. I dug down 24" and found our main but the water was bubbling up from beneath it. I kept digging and at about 36" I found a 6" PVC Tee with a 2" lateral coming out of it. Turns out it was the domestic water for the street. The tee had cracked just enough to be spraying water but not enough to cause a blow out. I didn't want to create a geyser by prodding the tee, so I left the hole open and we contacted the city to fix it. They were very happy that I dug it up for them.