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The size of a french drain depends on how well you soil drains. The soil where I live is heavy orange-tan clay, and you cannot dig a big enough french drain to carry away even a small amount of water.

A civil engineer should be of some help, although you will likely pay for her advice.

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βˆ™ 13y ago
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βˆ™ 4mo ago

French drains are typically dug to a depth of about 18-24 inches. This depth is sufficient to capture excess water and direct it away from the desired area. It's important to ensure the drain is sloped correctly so water can flow away efficiently.

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Q: How deep do you dig for french drain?
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What is a French drain?

A French drain is a trench filled with gravel or rock that redirects water away from an area to prevent water damage or flooding. It typically has a perforated pipe in the middle to facilitate water drainage. French drains are commonly used in landscaping and drainage systems.


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