The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
DETENTION BASINA structure or facility, natural or artificial, which stores stormwater on a temporary basis and releases it at a controlled rate. A detention basin may drain completely after a storm event, or it may be a pond with a fixed minimum water elevation between runoff events.
DISCHARGEThe rate of flow of water at a given point and time, measured in cubic feet per second.
DISTURBED AREAAn area of land subjected to the removal of vegetative cover and/or earth-moving activities.
DRAINAGE SYSTEMAll facilities, measures, areas, and structures which serve to convey, catch, filter, store, and/or receive stormwater, either on a temporary or permanent basis (also see definitions for primary drainage system and secondary drainage system).
EARTH CHANGEA human-made change in the natural cover or topography of land, including cut and fill activities, which may result in or contribute to soil erosion or sedimentation of watercourses or wetlands. Earth change does not include the practice of plowing and tilling soil for the purpose of crop production.
ENGINEERED GRADING PLANA map which shows alterations of topography, alterations of watercourses, flow directions of stormwater runoff, and proposed stormwater management and erosion control measures.
FLOODA temporary rise in the level of any water body, watercourse or wetland which inundates areas not ordinarily covered by water.
FLOODPLAINThe relatively flat areas or lowlands adjoining a watercourse or a body of water which has been or may be covered by floodwater.
INFILTRATION FACILITYA structure or designated area which allows runoff to gradually seep into the ground, e.g., french drains, seepage pits, infiltration basin, dry well, or perforated pipe.
MAINTENANCE AGREEMENTA binding agreement which sets forth the terms and conditions for the maintenance of erosion control measures and stormwater facilities.
OFF-SITE FACILITYAll or part of a drainage system which is located partially or completely off of the development site which it serves.
PEAK RATE OF DISCHARGEThe maximum allowable rate of stormwater flow from a storm event, as measured at a given point and time in cubic feet per second.
PERSONAny individual, firm, partnership, association, corporation, company, or organization of any kind, including government agencies, conducting operations within the Township.
PRIMARY DRAINAGE SYSTEMFacilities, structures, and areas which convey, store, or receive runoff from storms up to a ten-year frequency.
PROPRIETORA person, public corporation or authority, or a government agency that holds an interest in land, whether recorded or not.
PUBLIC STORM SEWERA drainage system serving a platted subdivision or other development which has been designed and constructed to be operated and maintained by the County Water Resources Commissioner or the County Road Commission.
RECEIVING BODY OF WATERAny watercourse, lake, pond or wetland into which surface waters are directed, either naturally or artificially.
RETENTION BASINA holding area for stormwater, either natural or human-made, which does not have an outlet to adjoining watercourses or wetlands. Water is removed from retention basins through infiltration and/or evaporation processes, and retention basins may or may not have a permanent pool of water.
RUNOFFThe part of precipitation which flows over the land.
SECONDARY DRAINAGE SYSTEMFacilities, structures and areas which convey, store or receive runoff from storms of more than a ten-year frequency and up to a one-hundred-year frequency.
SEDIMENTMineral or organic solid particulate matter that has been removed from its site of origin by the processes of soil erosion, is in suspension in water, or is being transported.
SITEAny tract, lot or parcel of land or combination of tracts, lots or parcels of land proposed for development.
SOIL EROSIONThe wearing away of land by the action of wind, water, gravity or a combination thereof.
SOIL EROSION CONTROL MEASURESA structure, facility, barrier, berm, vegetative cover, basin, and/or other installations designed to control accelerated soil erosion. Temporary measures are installed to control soil erosion during construction or until soils in the contributing drainage area are stabilized. Permanent measures remain after the project is completed.
STORAGE FACILITYA basin, structure, or area, either natural or human-made, which is capable of holding stormwater for the purpose of reducing the rate of discharge from the site.
STORM DRAINA conduit, pipe, swale, natural channel or human-made structure which serves to transport stormwater runoff. Storm drains may be either enclosed conduits or unenclosed drains.
STORMWATER MANAGEMENT PLANMaps and written information which describe the way in which soil erosion and stormwater flows are proposed to be controlled, both during and after construction.
STORMWATER MANAGEMENT SYSTEMThe primary drainage system, the secondary drainage system, and all erosion control measures, whether temporary or permanent.
SWALELow-lying area with gradual slopes which transports stormwater.
WATERSHEDA land area which contributes runoff to a receiving body of water, otherwise known as a "drainage area."