Tim Nugget and Hollowpoinred, thank you for your words of wisdom. The advice of "dig everything" does not work for every type hunt site. There are hunt sites that, quite frankly, would not be worth a person's time to strip-mine. Example: they tore down some humongous 1920s grandstands in my town, that had had hardpan dirt below them. For 70+ yrs, trash and coins rained down from the slats above. When they tore out the stands to make-way for new stands, the naked dirt stood for 1 glorious week 8) Each day after the workers cut out, we went there and harvested silver (and even a $5 gold was found, but those read higher than round tab). There was simply no way a person was going to be a hero and look for gold rings or nickels, d/t it was an ocean of pulltabs. You'd have averaged 100 tabs for each nickel. It was only possible to go for mid and high conductors, since the window of time before fill-dirt was added, would end the hunt. Did we miss nickels? Sure. But did we dig hundreds of silver coins that we would otherwise have not been able to? Sure. Time did not allow for strip-mining. You were either going to dig silver, or see the site covered forever, while you gathered a nice pulltab collection.