06-12-2002 Council Agenda - Laserfiche WebLink

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3.020 Filter Strips A vegetated section of land designed to treat runoff as overland sheet flow. They may be designed in any natural vegetated form from a grassy meadow to a small forest. Their dense vegetated cover facilitates pollutant removal and infiltration. 3.021 Final Stabilization Means that all soil disturbing activities at the site have been completed, and that a uniform perennial vegetative cover with a density of seventy -five (75) percent of the cover for unpaved areas and areas not covered by permanent structures has been established, or equivalent permanent stabilization measures have been employed. Simply sowing grass seed is not considered final stabilization. (Examples of vegetative cover practices can be found in the current version of the Minnesota Department of Transportation's publication, "Supplemental Specifications to the (year of the latest update) Standard Specifications for Construction. ") 3.022 Hydric Soils Soils that are saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions in the upper part. 3.023 Hydrophytic Vegetation Macrophytic (large enough to be observed by the naked eye) plant life growing in water, soil or on a substrate that is at least periodically deficient in oxygen as a result of excessive water content. 3.024 Impervious Surface 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 existed prior to development. Examples include rooftops, sidewalks, patios, driveways, parking lots, storage areas, and concrete, asphalt, or gravel roads. (Commentary: The movement of heavy equipment compacts soil and can significantly increase imperviousness. This problem is not corrected by covering the compacted soil with a lawn. Such compaction problems can cause an under estimate of a development's impervious nature.) 3.025 Land Disturbance Activity Any land change that may result in soil erosion from water or wind and the movement of sediments into or upon waters or lands within this government's jurisdiction, including clearing & grubbing, grading, excavating, transporting and filling of land. Within the context of this rule, land disturbance activity does not mean: A.) Minor land disturbance activities such as home gardens and an individual's home landscaping, repairs, and maintenance work. B.) Construction, installation, and maintenance of fences, signs, posts, poles, and electric, telephone, cable television, utility lines or individual service connections to these utilities, which result in creating under five thousand (5,000) square feet of exposed soil. C.) Tilling, planting, or harvesting of agricultural, horticultural, or silvicultural (forestry) crops. D.) Emergency work to protect life, limb, or property and emergency repairs, unless the land disturbing activity would have otherwise required an approved erosion and sediment