Answer: Drain tiles are sometimes called a French Drain. In some situations, a French drain facilitates water drainage. A French drain is a ditch-like trench, filled with rock or gravel. The rock should round the top, preventing soil from covering the drain. The trench must slope at least 1 to 3 percent, and flow to an outlet.
You basically dig a trench about 12" deep and 6-8" wide and fill it with river rock or gravel. Excess water will run into this area and help keep your lawn from being soggy wet.
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