Someone posted on this before with good findings. I believe this person had a few acres. I live in a home that was built in the 70's I think and there have been 2 owners before us. The yards front and back are small with grass and was doing some reading on how to properly tear the grass without ruining it. There are also bits of dirt. I do have a few questions. 1) Do you think I will find something of value? at least some wheats, indianheads, or buffalo nickels? 2) How do I go about discriminating or avoiding underground pipes and things like that? its funny because i was thinking about doing this before and my wife just suggested it to me. Today would be a good day to start this since it is raining on and off and there is nowhere to go. NO MATTER WHAT IT WILL BE A FUN PROJECT. ANY INFO ON THIS WOULD BE GREATLY APPRECIATED.