Hydro excavation of watermain replacement, Just Three of us trying to Install a 6" tee with Valve into the existing main to connect to a new main on the right we directional bored in earlier in the week. The leaking Lead Line / Corporation was an old blowoff installed from maybe 60 - 80 years ago that was unknown and was dripping when we found it, and once got disturbed by our digging started to let loose. Also a gas main was between the Clay Storm sewer pipe and the watermain hindering us digging recklessly. It was pretty cold, probably 20 degrees out.