Dave: That is my fear. Mark is fortunate to have such a strong spring. I wouldn't worry if mine flowed that well, but mine is more of a seep from a wide area. Ric's point about clay serving as a much better barrier than good topsoil is spot on. I guess the logical thing to do is dig the topsoil out more and see what it looks like then... I have plenty of clay to pack back into it if necessary. Thanks! Jeff

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