For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
CHANNEL. A natural or artificial watercourse of perceptible extent which periodically or continuously contains moving water, or which forms a connecting line between 2 bodies of water. It has a definite bed and banks which serve to confine the water.
CITY. The City of Monticello, Piatt County, Illinois.
DETENTION STORAGE. Temporary detention or storage of stormwater in storage basins, on rooftops, in parking lots, school yards, parks, open space, or other areas under predetermined and controlled conditions, with the rate of drainage therefrom regulated by appropriately installed devices.
DISCHARGE. The rate of outflow of water from a stormwater drainage or detention facility.
DRAINAGE AREA. The area from which water is carried off by a drainage system; a watershed or catchment area above a given point.
DRAINAGE EASEMENT. Authorization by a property owner allowing use of a designated portion of his or her property by others for drainage purposes.
EXCESS STORMWATER RUNOFF. That portion of stormwater runoff which exceeds the transportation capacity of storm sewers or natural drainage channels serving a specific watershed.
FLOOD ELEVATION. The elevation of all locations delineating the maximum level of high waters for a flood of a given return period.
FLOODPLAIN. The special flood hazard lands adjoining a watercourse, the surface elevation of which is lower than the flood elevation and which are subject to periodic inundation during floods.
GRADE. The inclination or slope of a channel, canal, conduit and the like, or natural ground surface, usually expressed in terms of percentage the vertical rise (or fall) bears to the corresponding horizontal distance.
IMPERVIOUS. A term applied to material through which water cannot pass, or through which water passes with great difficulty or at a very slow rate.
IMPERMEABLE. A term applied to material through which water cannot pass.
INLET. An opening into a storm sewer system for the entrance of surface storm runoff, more completely described as a STORM SEWER INLET.
NATURAL DRAINAGE. Water flow by gravity in channels formed by the true surface topography of the earth prior to change made by the efforts of humans.
NATURAL DRAINAGE CONDITION. The situation whereby water flows by gravity in channels formed by the true surface topography of the earth prior to changes made by the efforts of humans.
OWNER. The record title holder or a beneficiary of a land trust which is the record title holder, and includes singular or plural; if the owner is other than an individual, the term includes beneficiaries, agents, shareholders, officers and directors, partnerships, associations, firms, trusts, clubs, companies, or corporations.
RECORD DRAWINGS (DOCUMENTS). A compiled set of documents which can consist of specifications and/or drawings (furnished by city contractor(s), other sources and the like) showing reported location(s) of work for the completed project.
PERSON. An individual, public or private or private corporation, government, partnership, or unincorporated association.
RECOGNIZED AGENCY. A governmental unit or agency which has statistically and consistently examined local, climatic, and geologic conditions and maintained records as they apply to stormwater runoff, e.g. U.S. Weather Bureau, University of Illinois Engineering Experiment Station, and the Illinois State Water Survey.
RETENTION BASIN. A structure or feature designed to retain stormwater over a period of time, with its release being positively controlled over a longer period of time than a typical detention storage facility.
SUPERINTENDENT OF CITY SERVICES. The individual occupying that position on the staff of the city or his or her designated representative.
STORM SEWER. A closed conduit for conveying collected stormwater.
STORMWATER DRAINAGE SYSTEM. All means, natural or manmade, used for conducting stormwater to, through, or from a drainage area to the point of final outlet, including but not limited to any of the following: conduits, storm sewers, canals, channels, ditches, streams, culverts, streets, and pumping stations.
STORMWATER RUNOFF. The water that results from precipitation which is not absorbed by soil or plant material, which does not evaporate and which flows over the surface of the ground or is collected in channels, conduits, or ponds.
STORMWATER STORAGE AREA. An area designated to temporarily accumulate excess stormwater.
STRUCTURE. Anything which is constructed or erected with a fixed location on the ground or attached to something having a fixed location on the ground. Among other things, STRUCTURES include buildings, fences, signs, mobile homes, swimming pools, and walls.
TRADITIONAL AGRICULTURAL USES. Uses commonly classed as agricultural or horticultural, including forestry, crop farming, truck gardening, wholesale nursery operations, animal husbandry, the operation of any machinery or vehicles incidental to those uses, and the construction of a single-family dwelling and other farm structures incidental to or typically associated with those uses.
WATERCOURSE. Any stream, creek, brook, branch, natural or artificial depression, slough, gulch, reservoir, lake, pond, or natural or manmade drainageway in or into which stormwater runoff and floodwaters flow either regularly or intermittently.
WET BOTTOM STORMWATER STORAGE AREA. A facility that contains a body of water and which accumulates excess stormwater during periods when the restricted stormwater runoff release rate is less than the stormwater inflow rate.