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The driveway is often the biggest impervious surface, so we chose
Ecostone, a pervious paving system that strongly resists weeds, but yet is
highly pervious. In addition to being pervious, there is 12" of
highly porous gravel (large crushed rock, with no fines), which can hold a very
large amount of water, allowing the water to seep into the ground over
time. Our situation isn't the best use of pervious paving because
the driveway slope forces us to have a perimeter drain down by the house and
much of our underlying soil is clay, which isn't very pervious.
Pervious surfaces also help prevent storm sewer overflows.
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