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19 :. <br /> Impervious surface calculations for an individual <br /> development shall be cumulative for original <br /> construction and any subsequent additions and <br /> calculations of impervious surface coverage for <br /> individual lots shall include that portion of a <br /> right-of-way between the center line of the street <br /> and the abutting property line of the lot. <br /> ********************************************* <br /> 6. 24 . 6 Impervious Surface Regulated in Protected Watersheds <br /> Amended <br /> 11-19-85 An impervious surface is a surface composed of any <br /> material which impedes or prevents the natural <br /> infiltration of water into the soil. Such surfaces <br /> shall include, but not be limited to, streets and <br /> parking areas, sidewalks, patios and structures <br /> which cover the land. As a watershed becomes <br /> developed the amount of impervious surface <br /> increases causing a decrease in soil absorption of <br /> stormwater runoff and an increase in direct runoff <br /> to streams and other water bodies resulting in an <br /> increase in potential water pollution. <br /> In order to promote infiltration of stormwater <br /> runoff into the soil and to minimize direct and <br /> immediate runoff into streams and water supply <br /> impoundments, impervious surface ratios shall be <br /> required as provided in the Table of Impervious <br /> Surface Ratios Section 6. 23 . 4 . Modifications of <br /> the Impervious Surface Ratios may be requested, <br /> however, in accordance with the provisions of <br /> Section 6.23.4. <br /> Impervious surface calculations for an individual <br /> development shall be cumulative for original <br /> construction and any subsequent additions and <br /> calculations of impervious surface coverage for <br /> individual lots shall include that portion of a <br /> right-of-way between the centerline of the street <br /> and the edge the abutting property line of the lot. <br /> ********************************************* <br /> *6. 25.4 Impervious Surface Regulated <br /> *Amended An impervious surface is a surface composed of any <br /> 4-2-90 material which impedes or prevents the natural <br /> infiltration of water into the soil. Impervious <br /> surfaces shall include both paved and unpaved <br /> surfaces, including, but not limited to, streets <br /> and parking areas, driveways, sidewalks, patios, <br /> and structures which cover the land. <br />