New impervious surface definition

New impervious surface means the creation of a hard or compacted surface such as roofs, pavement, gravel or dirt or the addition of a more compacted surface such as the paving of existing dirt or gravel.

New impervious surface means a surface that is: changed from a pervious surface to an

New impervious surface means the creation of a hard or compacted surface such as roofs, pavement, gravel or dirt or the addition of a more compacted surface such as the paving of existing dirt or gravel. Permeable pavement and vegetated roofs are considered new impervious surface for purposes of determining whether the thresholds for application of minimum requirements are exceeded, as are lawns, landscaping, sports fields, golf courses, and other areas that have modified runoff characteristics resulting from the addition of underdrains designed to collect stormwater runoff. Open, uncovered retention/detention facilities shall not be considered impervious surfaces for purposes of determining whether the thresholds for application of minimum requirements are exceeded. Open, uncovered retention/detention facilities shall be considered impervious surfaces for purposes of runoff modeling. (Ord. O2011‐304 § 1 (Att. A))

Examples of New impervious surface in a sentence

• New impervious surface (NIS) area will be more than 1 acre, which will also require implementing treatment BMPs. The trash generation rating within the job site varies from low (L), to moderate (M), to very high-high (V-H-H).

• New impervious surface areas would be minimized to the extent practicable.

• New impervious surface (if greater than 1,000 SF) shall comply with the Maine Chapter 500 General Standard by providing treatment of no less than 95% of the impervious area and 80% of the developed area.

• New impervious surface is proposed over the locations of former impervious surface, and the total impervious surface of the site will be reduced by almost half from 20,982 SF existing to 10,900 SF in the proposed condition.

• New impervious surface areas for each project site would range from approximately 4 to 40 square feet, with most sites creating less than 20 square feet of new impervious surfaces.

More Definitions of New impervious surface

New impervious surface means an impervious surface created after the effective date of this Rule.

New impervious surface means the creation of impervious surface or the addition of a more compacted surface such as the paving of existing dirt or gravel.

New impervious surface means a surface that is:

New impervious surface means any of the following, alone or in combination:

New impervious surface means a surface that is: changed from a pervious surface to an impervious surface (e.g., resurfacing by upgrading from dirt to gravel, a bituminous surface treatment (“chip seal”), asphalt, concrete or an impervious structure); or upgraded from gravel to chip seal, asphalt, concrete, or an impervious structure; or from a impervious surface to an impervious structure. Note that if asphalt or concrete has been overlaid by a chip seal, the existing condition should be considered as asphalt or concrete.

New impervious surface means any impervious surface proposed by a project that will increase the runoff curve number of that surface for existing site conditions (e.g. gravel to asphalt). See "Impervious Areas."

New impervious surface means the creation of a hard or compacted surface