Welcome!
Not sure about being safe....Perhaps you keep trying and find out! L.o.l...
I lived in G.R. about a year. Tis a city. Not my cup of tea. No offence.
In the Michigan sub forum here you might locate the Michigan detectorist that hits areas in G.R.. I of course don't remember the name(s).
Parks were a topic if that helps in a search.
Where your X's are I don't want to know or see published for privacy's sake.
G.R. has many areas razed and bulldozed over time.
A yard I worked for someone was almost as much rubble as dirt for example.
Each park should likely be considered unique in what is below the surface.
You get stuck too long some where looking for a G.R. detectorist let me know.
www.treasurenet.com
