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Try digging a trench as suggested and lining the walls and bottom with a firm slurry of fines and portland cement at a ratio of 5 : 1, then before it is dry if youlike fill the trench with fines. Howver you would only do limited lengths like this so that you can allow for drainage, I put in a "well" every so often filled with aggregate to act as a drain. It works in the tropics so maybe it will work where you are. We have had 120 mm (6") rain in the last three days and it has held up all right. <br /> <br /> <br />Rgds Ian
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