If the tower owner has followed the FCC regulations, somewhere visible near the base of the tower they should have the owner's name and a 24 hour emergency contact number
There also should be a Tower registration Number
posted as well. You can search the FCC database for the owner with that.
IF those are NOT
visible and you know the approximate Lat/Lon of the tower, you can also search the FCC database for towers in the area of the Lat/Lon....
They "should" look something like in the pictures below.....