Impervious surface definition

Impervious surface means a surface that has been covered with a layer of material so that it is highly resistant to infiltration by water.

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Impervious surface means an area that releases as runoff all or a large portion of the precipitation that falls on it, except for frozen soil. Rooftops, sidewalks, driveways, gravel or paved parking lots and streets are examples of areas that typically are impervious.

Impervious surface means a constructed hard surface that either prevents or retards the entry of water into the soil and causes water to run off the surface in greater quantities and at an increased rate of flow than prior to development. Examples include rooftops, sidewalks, patios, driveways, parking lots, storage areas, and concrete, asphalt, or gravel roads.

Examples of Impervious surface in a sentence

• Permitted principal uses allowable on the Subject Property: <<LIST USES HERE>> Prohibited principal uses, if any: <<LIST USES HERE>> Proposed minimum density (in number of dwelling units per acre) or minimum intensity (measured in floor area ratio): Proposed maximum density (in number of dwelling units per acre) or maximum intensity (measured in floor area ratio), if any: Impervious surface ratio is not to exceed 70% of the gross square footage for the Subject Property.

• Impervious surface is defined as any material which covers land and inhibits the percolation of water directly into the soil, including, but not limited to, buildings, roofing, the area covered by permanent or nonpermanent structures, macadam and pavement, concrete, paved and stone driveways, roads, and parking areas, including proposed structures that are either permanent or temporary.

• Impervious surface: A surface composed of any material that impedes or prevents natural infiltration of water into the soil.

• Impervious surface limits are a 6% maximum in the critical area and 12% maximum in the non-critical area for all uses as currently required in Water Supply Watersheds classified as WS-II.

• Impervious surface ratio (ISR) – the ratio of impervious surfaces like asphalt, or buildings to pervious surfaces like grass on a specific parcel.

More Definitions of Impervious surface

Impervious surface means those manmade surfaces, including paved and unpaved roads, parking areas, roofs, driveways, and walkways, from which precipitation runs off rather than infiltrates.

Impervious surface means a surface composed of any material that significantly impedes or prevents the natural infiltration of water the soil.

Impervious surface means a hard surface area that either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development, a hard surface area which causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to, roof tops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. Open, uncovered retention/detention facilities shall not be considered as 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.

Impervious surface means a surface that has been covered with a layer of material so

Impervious surface means a non-vegetated surface area which either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development. A non-vegetated surface area which causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to, roof tops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater.

Impervious surface means those hard surface areas either which prevent or retard the entry of water into the soil in the manner that such water entered the soil under natural conditions pre-existent to development, or which cause water to run off the surface in greater quantities or at an increase rate of flow than that present under natural conditions pre-existent to development, including, without limitations, such surfaces as roof tops, compacted gravel, asphalt or concrete paving, driveways and parking lots, walkways, patio areas, storage areas, or other surfaces which similarly affect the natural infiltration or runoff patterns existing prior to development.

Impervious surface means a surface which is compacted or covered with material that is resistant to infiltration by water, including, but not limited to, most conventionally surfaced streets, roofs, sidewalks, patios, driveways, parking lots, and any other oiled, graveled, graded, compacted, or any other surface which impedes the natural infiltration of surface water.