Zoning Dictionary

Category: Environmental

Hazard Lands

Lands which are or may be inappropriate for urban development by reason of having inherent or natural environmental hazards such as susceptibility to flood or erosion, poor drainage, organic soils, steep slopes or any physical condition or limitation and which, if developed, may lead to the deterioration or degradation of the environment or cause property […]

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Impervious Area

Impervious area An area with a surface which prevents or significantly retards the soakage of water into the ground. Includes: roofs; paved areas including driveways and sealed/compacted metal parking areas, patios; sealed and compacted metal roads; and layers engineered to be impervious such as compacted clay. Excludes: grass and bush areas; gardens and other vegetated […]

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Impervious Ground Cover

Any building, pavement, or other material that substantially bars the natural infiltration of surface water into the soil. Manufactured materials that meet the City’s design standards shall not be considered impervious ground cover.

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In-Vessel Composting

A process in which compostable material is enclosed in a drum, silo or similar structure where the environmental conditions are controlled and the compostable material is aerated and mechanically agitated to allow for accelerated decomposition.

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Isolated Wetlands

Either (1) non-tidal rivers, streams and their lakes and impoundment, including adjacent wetlands, that are located above the headwaters; or (2) other non-tidal waters of the United States, including wetlands, that are not part of a surface tributary system to interstate waters or navigable waters of the United States.

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Microclimate

The climate of a small, distinct area, such as a city street or a building’s courtyard; can be altered through functional landscaping, architecture, or other design features.

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Natural Area

Areas of land or water representing distinctive elements of an area’s geological, ecological or species diversity and including natural landscapes or features of value for natural heritage protection.

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Naturalization

Establishment or re-establishment of vegetation with the potential to reinstate wildlife habitat.

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Nature Conservation Area

An area set apart for the purpose of the conservation or preservation of natural and/or cultural values.

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Permeable Paving

A pavement system designed to allow movement of stormwater through the pavement surface and into an aggregate base.  Concrete bases and mortar are prohibited.  Materials include but are not limited to pervious concrete and asphalt, aggregate if stabilized with a grid-system that prevents compaction and washout; and permeable pavement, such as open-jointed blocks, pavers, or […]

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