Driveway Surfaces That Would Not Be Considered "Impervious"

Long Pine · 11-03-2008, 12:00 AM

As you know, the impervious surface rules of the Comprehensive Shoreland Protection Act limit the percentage of a lot that can consist of "impervious surfaces" to 20-30% of the size of the lot (assuming the lot is in the protected shoreland). The "impervious surface" definition from the act is below.

VII-b. "Impervious surface'' means any modified surface that cannot effectively absorb or infiltrate water. Examples of impervious surfaces include, but are not limited to, roofs, decks, patios, and paved, gravel, or crushed stone driveways, parking areas, and walkways unless designed to effectively absorb or infiltrate water.

Depending on the shape of the lot, a driveway can take up a lot of impervious square footage. My question is whether permeable pavers (examples can be found in a google search) would fall into the definition of being "designed to effectively absorb or infiltrate water" and therefore would not count toward the impervious surface rules. Are there examples of other driveway surfaces that would also not count as impervious?

11-03-2008, 12:00 AM	#1
Long Pine Senior Member Join Date: Apr 2007 Posts: 93 Thanks: 12 Thanked 33 Times in 12 Posts	Driveway Surfaces That Would Not Be Considered "Impervious" As you know, the impervious surface rules of the Comprehensive Shoreland Protection Act limit the percentage of a lot that can consist of "impervious surfaces" to 20-30% of the size of the lot (assuming the lot is in the protected shoreland). The "impervious surface" definition from the act is below. VII-b. "Impervious surface'' means any modified surface that cannot effectively absorb or infiltrate water. Examples of impervious surfaces include, but are not limited to, roofs, decks, patios, and paved, gravel, or crushed stone driveways, parking areas, and walkways unless designed to effectively absorb or infiltrate water. Depending on the shape of the lot, a driveway can take up a lot of impervious square footage. My question is whether permeable pavers (examples can be found in a google search) would fall into the definition of being "designed to effectively absorb or infiltrate water" and therefore would not count toward the impervious surface rules. Are there examples of other driveway surfaces that would also not count as impervious?