I poured water on my driveway and it disappeared. Is it really impervious?
Not all gravel driveways are created and maintained equally. While some driveways may hold water to some degree there are others that are poorly drained and have a high amount of runoff. Over time gravel driveways collect debris/dirt and compact into an impervious layer, which is what makes them effective, hard surfaces for vehicles.

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1. Why are gravel driveways considered impervious?
2. Who else classifies gravel as impervious?
3. I poured water on my driveway and it disappeared. Is it really impervious?
4. Can I get credit for my gravel driveway?
5. Are there permeable driveway surfaces?