I have a place like that that my wife and I have been hitting about once or twice a week,, most hits are coins,, all new of course,, but the clad adds up,, finding a lot of clad quarters,, probably missing a lot of nickles,, jsut cant seem to get the tone down right for them,, but if I had to guess,, I know we have taken prob 400 plus coins out of this place,, its getting to be slim pickings,, but we still go ot for a hour or two afer work and pick up a few,, prob will go today,, the rain softened up the ground a bit,, last couple of weeks its been like digging in concrete,,