For the purposes of this chapter, the following terms shall have the following meanings:
ACCELERATED EROSION: Erosion caused by development activities that exceeds the natural processes by which the surface of the land is worn away by the action of water, wind, or chemical action.
APPLICANT: A property owner or agent of a property owner who has filed an application for a stormwater management permit.
BMP MANUAL: The manual titled Protecting Water Quality in Urban Areas (Best Management Practices for Minnesota), prepared by the Minnesota Pollution Control Agency, Division of Water Quality, latest edition.
BUILDING: Any structure, either temporary or permanent, having walls and a roof, designed for the shelter of any person, animal, or property, and occupying more than one hundred (100) square feet of area.
CHANNEL: A natural or artificial watercourse with a definite bed and banks that conducts continuously or periodically flowing water.
DEDICATION: The deliberate appropriation of property by its owner for general public use.
DETENTION: The temporary storage of storm runoff in a stormwater management practice with the goals of controlling peak discharge rates and providing gravity settling of pollutants.
DETENTION FACILITY: A detention basin or alternative structure designed for the purpose of temporary storage of stream flow or surface runoff and gradual release of stored water at controlled rates.
DEVELOPER: A person who undertakes land disturbance activities.
DRAINAGE EASEMENT: A legal right granted by a landowner to a grantee allowing the use of private land for stormwater management purposes.
FEE IN LIEU: A payment of money in place of meeting all or part of the stormwater performance standards required by this chapter.
GRADING, DRAINAGE, AND EROSION CONTROL PLAN: A set of plans prepared by or under the direction of a licensed professional engineer that depicts existing and proposed grading, temporary and permanent drainage facilities, and indicates the specific measures and sequencing to be used to control sediment and erosion on a development site before, during and after construction.
HOTSPOT: An area where land use or activities generate highly contaminated runoff, with concentrations of pollutants in excess of those typically found in stormwater.
HYDROLOGIC SOIL GROUP (HSG): A Natural Resource Conservation Service classification system in which soils are categorized into four (4) runoff potential groups. The groups range from A soils, with high permeability and little runoff production, to D soils, which have low permeability rates and produce much more runoff.
IMPERVIOUS COVER: Those surfaces that cannot effectively infiltrate rainfall (e.g., building rooftops, pavement, sidewalks, driveways, etc.).
INDUSTRIAL STORMWATER PERMIT: A national pollutant discharge elimination system permit issued to a commercial industry or group of industries which regulates the pollutant levels associated with industrial stormwater discharges or specifies on site pollution control strategies.
INFILTRATION: The process of percolating stormwater into the subsoil.
INFILTRATION FACILITY: Any structure or device designed to infiltrate retained water to the subsurface. These facilities may be above grade or below grade.
JURISDICTIONAL WETLAND: An area that is inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support a prevalence of vegetation typically adapted for life in saturated soil conditions, commonly known as hydrophytic vegetation.
LAND DISTURBANCE ACTIVITY: Any activity which changes the volume or peak flow discharge rate of rainfall runoff from the land surface. This may include the grading, digging, cutting, scraping, or excavating of soil, placement of fill materials, paving, construction, substantial removal of vegetation, or any activity which bares soil or rock or involves the diversion or piping of any natural or manmade watercourse.
LANDOWNER: The legal or beneficial owner of land, including those holding the right to purchase or lease the land, or any other person holding proprietary rights in the land.
MAINTENANCE AGREEMENT: A legally recorded document that acts as a property deed restriction, and which provides for long term maintenance of stormwater management practices.
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) STORMWATER DISCHARGE PERMIT: A permit issued by the EPA (or by a state under authority delegated pursuant to 33 USC section 1342(b)) that authorizes the discharge of pollutants to waters of the United States, whether the permit is applicable on an individual, group, or general areawide basis.
NONPOINT SOURCE POLLUTION: Pollution from any source other than from any discernible, confined, and discrete conveyances, and shall include, but not be limited to, pollutants from agricultural, silvicultural, mining, construction, subsurface disposal and urban runoff sources.
OFF SITE FACILITY: A stormwater management measure located outside the subject property boundary described in the permit application for land development activity.
OFFSET FEE: A monetary compensation paid to a local government for failure to meet pollutant load reduction targets.
ON SITE FACILITY: A stormwater management measure located within the subject property boundary described in the permit application for land development activity.
RECHARGE: The replenishment of underground water reserves.
REDEVELOPMENT: Any construction, alteration or improvement exceeding ten thousand (10,000) square feet in area where existing land use is high density commercial, industrial, institutional or multi-family residential.
SWPPP: The stormwater pollution prevention plan required by the NPDES permit.
SITE DEVELOPMENT PERMIT: The permit issued by the City for which the purpose is construction or alteration of ground.
STOP WORK ORDER: An order issued which requires that all construction activity on a site be stopped.
STORMWATER MANAGEMENT: The use of structural or nonstructural practices that are designed to reduce stormwater runoff pollutant loads, discharge volumes, peak flow discharge rates and detrimental changes in stream temperature that affect water quality and habitat.
STORMWATER MANAGEMENT PLAN: The hydrologic analysis report and drainage area map(s) that provides the predevelopment and postdevelopment hydrologic site conditions.
STORMWATER RETROFIT: A stormwater management practice designed for an existing development site that previously had either no stormwater management practice in place or a practice inadequate to meet the stormwater management requirements of the site.
STORMWATER RUNOFF: Flow on the surface of the ground resulting from precipitation.
STORMWATER TREATMENT PRACTICES (STPs): Measures, either structural or nonstructural, that are determined to be the most effective, practical means of preventing or reducing point source or nonpoint source pollution inputs to stormwater runoff and water bodies.
WATER QUALITY VOLUME (WQv): The storage needed to capture and treat ninety percent (90%) of the average annual stormwater runoff volume. Numerically WQv will vary as a function of long term rainfall statistical data.
WATERCOURSE: A permanent or intermittent stream or other body of water, either natural or manmade, which gathers or carries surface water. (Prior Code § 4-5-2)