Thanks folks. Got to digging there yesterday and found no whole bottles but more good sign. This isn't a park per say but it is Crown land. The trails are managed and maintained by a local off road bike club. This dig site I will be able to restore once I'm done - that's my defense should the need arise. lol
I got a good start on a burn site but the surface is frozen about 4 inches thick right over the deepest part - I under mined about 2 feet but can't get deeper till this thaws. At about 2.5 feet down I hit a big hole in 2 different spots under this frozen layer. I've a coupla photos of my progress.
This first photo shows something that feels real familiar but I just can't place it....any guesses?