(A) For the purpose of this chapter, the following abbreviations shall apply.
(1) BMP. Best management practice.
(2) CWA. Clean Water Act.
(3) ERU. Equivalent residential unit.
(4) GIS. Geographical Information System.
(5) IDEM. Indiana Department of Environmental Management.
(6) MS4. Municipal separate storm sewers.
(7) NPDES. National Pollution Discharge Elimination System.
(8) NRCS. USDA-Natural Resources Conservation Service.
(9) POTW. Publicly Owned Treatment Works.
(10) SWCD. Soil and Water Conservation District.
(11) SWPPP. Stormwater pollution prevention plan.
(12) USACE. United States Army Corps of Engineers.
(13) USDA. United States Department of Agriculture.
(14) USEPA. Environmental Protection Agency.
(B) For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
(1) BEST MANAGEMENT PRACTICES. Design, construction, and maintenance practices and criteria for stormwater facilities that minimize the impact of stormwater runoff rates and volumes, prevent erosion, and capture pollutants.
(2) BOARD. The City of Vincennes Utility Services Board, if it has the authority to operate the stormwater system. The Board of Works, if there is no Utility Service Board or if the Utility Service Board does not have the authority to operate the stormwater system.
(3) BUFFER STRIP. An existing, variable width strip of vegetated land intended to protect water quality and habitat.
(4) CAPACITY OF A STORM DRAINAGE FACILITY. The maximum flow that can be conveyed or stored by a storm drainage facility without causing damage to public or private property.
(5) CATCH BASIN. A chamber usually built at the curb line of a street for the admission of surface water to a storm drain or subdrain, having at its base a sediment sump designed to retain grit and detritus below the point of overflow.
(6) CHANNEL. A natural or artificial watercourse which periodically or continuously contains moving/standing water or which forms a connecting link between two bodies of water. It has a defined bed and banks, which serve to confine the water.
(7) COMPENSATORY STORAGE. An artificial volume of storage within a floodplain used to offset loss of natural flood storage capacity when artificial fill or structures are placed within the floodplain.
(8) CONDUIT. A device to convey water runoff or drainage flow.
(9) CONTIGUOUS. Adjoining, or in actual contact with.
(10) CONSTRUCTED WETLAND. A man-made shallow pool that creates growing conditions suitable for wetland vegetation and is designed to maximize pollutant removal.
(11) CONSTRUCTION ACTIVITY. Land disturbing activities, and land disturbing activities associated with the construction of infrastructure and structures. This term does not include routine ditch or road maintenance or minor landscaping projects.
(12) CONSTRUCTION SITE ACCESS. A stabilized stone surface at all points of ingress or egress to a project site, for the purpose of capturing and detaining sediment carried by tires of vehicles or other equipment entering or exiting the project site.
(13) CONTOUR. An imaginary line on the surface of the earth connecting points of the same elevation.
(14) CONTRACTOR or SUBCONTRACTOR. An individual or company hired by the project site or individual lot owner, their agent, or the individual lot operator to perform services on the project site.
(15) CONVEYANCE. Any structural method for transferring stormwater between at least two points. The term includes piping, ditches, swales, curbs, gutters, catch basins, channels, storm drains, and roadways.
(16) CROSS SECTION. A graph or plot of ground elevation across a stream valley or a portion of it, usually along a line perpendicular to the stream or direction of flow.
(17) CULVERT. A closed conduit used for the conveyance of surface drainage water under a roadway, railroad, canal or other impediment.
(18) DE-CHLORINATED SWIMMING POOL DISCHARGE. Chlorinated water that has either sat idle for seven days following chlorination prior to discharge to the MS4 conveyance, or, by analysis, does
not contain detectable concentrations (less than five-hundredths milligram per liter) of chlorinated residual.
(19) DEPARTMENT. The Wastewater Department.
(20) DETENTION. Managing stormwater runoff by temporary holding and controlled release.
(21) DETENTION BASIN. A stormwater control facility constructed or modified to restrict the flow of stormwater to a prescribed maximum rate, and to concurrently detain the excess waters resulting from development. This facility has no permanent water pool during inter-storm periods.
(22) DETENTION STORAGE. The temporary detaining or storage of stormwater in storage basins, underground chambers, in streets, parking lots, school yards, parks, open spaces, or other areas under predetermined and controlled conditions, with the rate of drainage released therefrom regulated by appropriately installed devices.
(23) DETRITUS. Dead or decaying organic matter; generally contributed to stormwater as fallen leaves and sticks or as dead aquatic organisms.
(24) DEVELOPER. Any person financially responsible for construction activity, or an owner of property who sells or leases, or offers for sale or lease, any lots in a subdivision.
(25) DEVELOPMENT OR DEVELOPED LANDS. The activities that result in a change of land use or an area where a change to a more intensive land use has occurred or migration from a less intense to more intense land use. This activity commonly results in increased runoff and peak discharge.
(26) DISCHARGE. Usually the rate of water flow. A volume of fluid passing a point per unit time commonly expressed as cubic feet per second, cubic meters per second, gallons per minute, or millions of gallons per day.
(27) DISPOSAL. The discharge, deposit, injection, spilling, leaking, or placing of any solid waste or hazardous waste into or on any land or water so that the solid waste or hazardous waste, or any constituent of the waste, may enter the environment, be emitted into the air, or be discharged into any waters, including groundwaters.
(28) DITCH. A man-made, open drainageway in or into which excess surface water or groundwater drained from land, stormwater runoff, or floodwaters flow either continuously or intermittently.
(29) DRAIN. A buried slotted or perforated pipe or other conduit (subsurface drain) or a ditch (open drain) for carrying off surplus groundwater or surface water.
(30) DRAINAGE. The removal of excess surface water or groundwater from land by means of ditches or subsurface drains. Also see NATURAL DRAINAGE.
(31) DRAINAGE AREA. The area that contributes runoff to a point of interest, or design point, during a rainfall event; i.e., a watershed or catchment area.
(32) DRAINAGEWAY. A natural or artificial stream, closed conduit, or depression that carries surface water. This term is used as a neutral term applying to all types of drains and watercourses, whether man-made or natural.
(33) DURATION. The time period of a rainfall event.
(34) DWELLING UNIT. A building or structure, or portion thereof, that contains living facilities, including provisions for sleeping, eating, cooking and sanitation, as required by local, state and federal code, for not more than one family or congregate resident for 16 or fewer persons.
(35) ENVIRONMENT. The sum total of all the external conditions that may act upon a living organism or community to influence its development or existence.
(36) EQUIVALENT RESIDENT UNIT. One EQUIVALENT RESIDENT UNIT shall equal 2,800 square feet of impervious surface area, which shall be considered the average impervious surface area for a residential property.
(37) EROSION. The wearing away of the land by running water, waves, weather cycles, ice or wind. The following terms are used to describe different types of water EROSION:
(a) ACCELERATED EROSION. Erosion much more rapid than normal or geologic erosion, primarily as a result of the activities of man.
(b) CHANNEL EROSION. An erosion process whereby the volume and velocity of flow wears away the bed and/or banks of a well-defined channel.
(c) GULLY EROSION. An erosion process whereby runoff water accumulates in narrow channels and, over relatively short periods, removes the soil to considerable depths, ranging from one to two feet to as much as 75 to100 feet.
(d) RILL EROSION. An erosion process in which numerous small channels only several inches deep are formed; occurs mainly on recently disturbed and exposed soils.
(e) SPLASH EROSION. The spattering of small soil particles caused by the impact of raindrops on wet soils; the loosened and spattered particles may or may not be subsequently removed by surface runoff.
(f) SHEET EROSION. The gradual removal of a fairly uniform layer of soil from the land surface by runoff water.
(38) EROSION AND SEDIMENT CONTROL. A practice, or a combination of practices, to minimize sedimentation by first reducing or eliminating erosion at the source and then, as necessary, trapping sediment to prevent it from being discharged from or within a project site.
(39) FILTER STRIP. Usually a long, relatively narrow area (usually 20 to 75 feet wide) of undisturbed or planted vegetation used near disturbed or impervious surfaces to filter stormwater pollutants for the protection of watercourses, reservoirs, or adjacent properties.
(40) FLOOD (or FLOODWATERS). A general and temporary condition of partial or complete inundation of normally dry land areas from the overflow, the unusual and rapid accumulation, or the runoff of surface waters from any source.
(41) FLOOD ELEVATION. The elevation delineating the maximum level of high waters for a flood of given return period and rainfall duration.
(42) FLOODPLAIN. The channel proper and the areas adjoining the channel which have been or hereafter may be covered by the regulatory or 100-year flood. Any normally dry land area that is susceptible to being inundated by water from any natural source. The FLOODPLAIN includes both the floodway and the floodway fringe districts.
(43) FLOODWAY. The channel of a river or stream and those portions of the floodplains adjoining the channel which are reasonably required to efficiently carry and discharge the peak flow of the regulatory flood of any river or stream.
(44) FLOODWAY FRINGE. That portion of the floodplain lying outside the floodway, which is inundated by the regulatory flood.
(45) FOOTING DRAIN. A drain pipe installed around the exterior of a basement wall foundation to relieve water pressure caused by high groundwater elevation.
(46) GARBAGE. All putrescible animal solid, vegetable solid, and semisolid wastes resulting from the processing, handling, preparation, cooking, serving, or consumption of food or food materials.
(47) GASOLINE OUTLET. An operating gasoline or diesel fueling facility whose primary function is the resale of fuels. The term applies to facilities that create 5,000 or more square feet of impervious surfaces, or generate an average daily traffic count of 100 vehicles per 1,000 square feet of land area.
(48) GRADE.
(a) The inclination or slope of a channel, canal, conduit, or the like, or natural ground surface, usually expressed in terms of the percentage the vertical rise (or fall) bears to the corresponding horizontal distance.
(b) The finished surface of a canal bed, roadbed, top of embankment, or bottom of excavation; any surface prepared to a design elevation for the support of construction, such as paving or the laying of a conduit.
(c) To finish the surface of a canal bed, roadbed, top of embankment, or bottom of excavation, or other land area to a smooth, even condition.
(49) GRADING. The cutting and filling of the land surface to a desired slope or elevation.
(50) GRASS. A member of the botanical family Graminae, characterized by blade-like leaves that originate as a sheath wrapped around the stem.
(51) GROUNDWATER. Accumulation of underground water, natural or artificial. The term does not include man-made underground storage or conveyance structures.
(52) HABITAT. The environment in which the life needs of a plant or animal are supplied.
(53) HYDROLOGIC UNIT CODE. A numeric United States Geologic Survey code that corresponds to a watershed area. Each area also has a text description associated with the numeric ordinance.
(54) HYDROLOGY. The science of the behavior of water in the atmosphere, on the surface of the earth, and underground. A typical hydrologic study is undertaken to compute flow rates associated with specified flood events.
(55) ILLICIT DISCHARGE. Any discharge to a conveyance that is not composed entirely of stormwater except naturally occurring floatables, such as leaves or tree limbs.
(56) IMPACT AREAS. Areas defined, listed and/or mapped by the Board which are unlikely to be easily drained because of one or more factors including but not limited to any of the following: soil type, topography, land with no adequate drainage outlet, a floodway or floodplain, land within 75 feet of the top of each bank of any regulated drain or within 75 feet from the centerline of any regulated storm sewer or tile drain.
(57) IMPAIRED WATERS. Waters that do not or are not expected to meet applicable water quality standards, as included on IDEM's CWA Section 303(d) List of Impaired Waters.
(58) IMPERVIOUS SURFACE. Surfaces, such as pavement and rooftops, which prevent the infiltration of stormwater into the soil.
(59) INDIVIDUAL BUILDING LOT. A single parcel of land within a multi-parcel development.
(60) INDIVIDUAL LOT OPERATOR. A contractor or subcontractor working on an individual lot.
(61) INDIVIDUAL LOT OWNER. A person who has financial control of construction activities for an individual lot.
(62) INFILTRATION. Passage or movement of water into the soil. INFILTRATION practices include any structural BMP designed to facilitate the percolation of runoff through the soil to groundwater. Examples include infiltration basins or trenches, dry wells, and porous pavement.
(63) INLET. An opening into a storm drain system for the entrance of surface stormwater runoff, more completely described as a storm drain inlet.
(64) LAND SURVEYOR. A person licensed under the laws of the State of Indiana to practice land surveying.
(65) LARGER COMMON PLAN OF DEVELOPMENT OR SALE. A plan, undertaken by a single project site owner or a group of project site owners acting in concert, to offer lots for sale or lease; where such land is contiguous, or is known, designated, purchased or advertised as a common unit or by a common name, such land shall be presumed as being offered for sale or lease as part of a LARGER COMMON PLAN. The term also includes phased or other construction activity by a single entity for its own use.
(66) LATERAL STORM SEWER. A sewer that has inlets connected to it but has no other upstream storm sewer connected. LATERAL STORM SEWERS connect to a main storm sewer outlet.
(67) MANHOLE. Storm sewer junction and maintenance structure through which a person or equipment may enter to gain access to an underground storm sewer or enclosed structure.
(68) MEASURABLE STORM EVENT. A precipitation event that results in a total measured precipitation accumulation equal to, or greater than, one-half inch of rainfall.
(69) MS4 OPERATOR. The person tasked with managing the MS4 area activities covered by 327 IAC 15-13.
(70) MULCH. A natural or artificial layer of plant residue or other materials covering the land surface which conserves moisture, holds soil in place, aids in establishing plant cover, and minimizes temperature fluctuations.
(71) MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4). An MS4 meets all the following criteria: (a) is a conveyance or system of conveyances owned by the state, county, city, town, or other public entity; (b) discharges to waters of the U.S.; (c) is designed or used for collecting or conveying stormwater; (d) is not a combined sewer; and (e) is not part of a Publicly Owned Treatment Works (POTW).
(72) NATIONAL POLLUTION DISCHARGE ELIMINATION SYSTEM. A permit developed by the USEPA through the Clean Water Act. In Indiana, the permitting process has been delegated to IDEM. This permit covers aspects of municipal stormwater quality.
(73) NATURAL DRAINAGE. The flow patterns of stormwater runoff over the land in its pre-development state.
(74) NON-RESIDENTIAL PROPERTY. A parcel or property that is not a residential property.
(75) NUTRIENT(S).
(a) A substance necessary for the growth and reproduction of organisms.
(b) In water, those substances (chiefly nitrates and phosphates) that promote growth of algae and bacteria.
(76) OFF-SITE. Considered to be not on-site. Typically not under the direct control or influence of the developer.
(77) ON-SITE. Located within the controlled area of development.
(78) OPEN DRAIN. A natural watercourse or constructed open channel that conveys drainage water.
(79) OPEN SPACE. Any land area devoid of any disturbed or impervious surfaces created by industrial, commercial, residential, agricultural, or other man-made activities.
(80) OUTFALL. The point or location where storm runoff discharges from a storm sewer or drain; also applies to the outfall sewer or channel which carries the storm runoff to its point of OUTFALL.
(81) OUTLET. The point of water disposal from a stream, river, lake, tidewater, or artificial drain.
(82) PEAK FLOW. The maximum rate of flow of stormwater at a given point in a channel or conduit resulting from a particular storm or flood, commonly recorded in cubic feet per second.
(83) PERMANENT STABILIZATION. The establishment, at a uniform density of 70% across the disturbed area, of vegetative cover or permanent non-erosive material that will ensure the resistance of the soil to erosion, sliding, or other movement.
(84) PERVIOUS. Allowing movement of water.
(85) POINT SOURCE. Any discernible, confined, and discrete conveyance including but not limited to any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, or container from which pollutants are or may be discharged (P.L. 92-500, Section 502[14]).
(86) PROFESSIONAL ENGINEER. A person licensed under the laws of the State of Indiana to practice professional engineering.
(87) PROJECT SITE. The entire area on which construction activity is to be performed.
(88) PROJECT SITE OWNER. The person required to submit a stormwater permit application, and required to comply with the terms of this chapter, including a developer or a person who has financial and operational control of construction activities, and project plans and specifications, including the ability to make modifications to those plans and specifications.
(89) RADIUS OF CURVATURE. Length of radius of circle used to define a curve.
(90) RAINFALL INTENSITY. The cumulative depth of rainfall occurring over a given time period, normally expressed in inches per hour.
(91) REACH. Any selected length of river, channel or storm sewer.
(92) RECREATIONAL WATERS. Most recreational activities within the MS4 area revolve around the Wabash River.
(93) REDEVELOPMENT. Alterations of a property that change a site or building in such a way that there is disturbance of one acre or more of land. The term does not include such activities as exterior remodeling.
(94) REFUELING AREA. An operating gasoline or diesel fueling area whose primary function is to provide fuel to equipment or vehicles.
(95) REGULATORY FLOOD. The discharge or elevation associated with the 100-year flood as calculated by a method and procedure which is acceptable to and approved by the Indiana Department of Natural Resources and the Federal Emergency Management Agency. The REGULATORY FLOOD is also known as the BASE FLOOD.
(96) REGULATORY FLOODWAY. See FLOODWAY.
(97) RELEASE RATE. The amount of stormwater released from a stormwater control facility (typically a detention basin or retention pond) per unit of time. This term is normally expressed in cubic feet per second.
(98) RESERVOIR. A natural or artificially created pond, lake or other space used for storage, regulation or control of water. May be either permanent or temporary. The term is also used in the hydrologic modeling of storage facilities.
(99) RESIDENTIAL PROPERTY. A parcel or property containing a single building or structure intended for sleeping purposes and containing not more than one dwelling unit.
(100) RETENTION. The storage of stormwater to prevent it from leaving the development site. May be temporary or permanent.
(101) RETENTION BASIN OR POND. A stormwater control facility designed to retain a permanent pool of water after having provided its planned detention of runoff during a storm event, or one that has no outlet and discharges into the soil with time.
(102) RETURN PERIOD. The average interval of time within which a given rainfall event will be equaled or exceeded once. A flood having a RETURN PERIOD of 100 years has a 1% probability of being equaled or exceeded in any one year.
(103) RIPARIAN HABITAT. A land area adjacent to a waterbody that supports animal and plant life associated with that waterbody.
(104) RIPARIAN ZONE. Areas on and adjacent to the banks of a stream, river, or pond, through which surface and subsurface hydrology connect waterbodies with their adjacent uplands.
(105) RUNOFF. That portion of precipitation that flows from a drainage area on the land surface, in open channels, or in stormwater conveyance systems.
(106) RUNOFF CO-EFFICIENT. A decimal fraction relating the amount of rain which appears as runoff and reaches the storm drain system to the total amount of rain falling. A co-efficient of 0.5 implies that 50% of the rain falling on a given surface appears as stormwater runoff.
(107) SEDIMENT. Solid material (both mineral and organic) that is in suspension, is being transported, or has been moved from its site of origin by air, water, gravity, or ice and has come to rest on the earth's surface. Material of soil and rock origin, transported, carried and deposited by water.
(108) SEDIMENTATION. The process that deposits soils, debris and other unconsolidated materials either on the ground surfaces or in bodies of water or watercourses.
(109) SITE. The entire area included in the legal description of the land on which land disturbing activity is to be performed.
(110) SLOPE. Degree of deviation of a surface from the horizontal, measured as a numerical ratio or percent. Expressed as a ratio, the first number is commonly the horizontal distance (run) and the second is the vertical distance (rise) e.g., 2:1. However, the preferred method for designation of slopes is to clearly identify the horizontal (H) and vertical (V) components (length (L) and width (W) components for horizontal angles). Also note that according to international standards (Metric), the slopes are presented as the vertical or width component shown on the numerator (e.g., 1V:2H). Slope expressions in this chapter follow the common presentation of slopes (e.g., 2:1) with the metric presentation shown in parenthesis (e.g., (1V:2H)). SLOPES can also be expressed in percents. SLOPES given in percents are always expressed as (100*V/H) (e.g., a 2:1 (1V:2H) slope is a 50% slope).
(111) SOIL. The unconsolidated mineral and organic material on the immediate surface of the earth that serves as a natural medium for the growth of land plants.
(112) SOIL AND WATER CONSERVATION DISTRICT. A public organization created under state law as a special-purpose district to develop and carry out a program of soil, water, and related resource conservation, use, and development within its boundaries. A subdivision of state government with a local governing body, established under I.C. 14-32.
(113) SOLID WASTE. Any garbage, refuse, debris, or other discarded material.
(114) SPILL. The unexpected, unintended, abnormal, or unapproved dumping, leakage, drainage, seepage, discharge, or other loss of petroleum, hazardous substances, extremely hazardous substances, or objectionable substances. The term does not include releases to impervious surfaces when the substance does not migrate off the surface or penetrate the surface and enter the soil.
(115) SPILLWAY. A waterway in or about a hydraulic structure, for the passage or flow of water. A portion of a stormwater control facility designed for the passage or flow of water.
(116) STILLING BASIN. A water-filled basin used to dissipate energy of flowing water.
(117) STORAGE DURATION. The length of time that water may be stored in any stormwater control facility, computed from the time water first begins to be stored.
(118) STORM EVENT. An estimate of the expected amount of precipitation within a given period of time. For example, a ten-year frequency, 24-hour duration storm event is a storm that has a 10% probability of occurring in any one year. Precipitation is measured over a 24-hour period.
(119) STORM SEWER. A closed conduit for conveying collected stormwater, while excluding sewage and industrial wastes. Also called a STORM DRAIN.
(120) STORMWATER. Water resulting from rain, melting or melted snow, hail, or sleet.
(121) STORMWATER DRAINAGE SYSTEM. All means, natural or man-made, used for conducting stormwater to, through or from a drainage area to any of the following: conduits and appurtenant features, canals, channels, ditches, storage facilities, swales, streams, culverts, streets and pumping stations.
(122) STORMWATER POLLUTION PREVENTION PLAN. A plan developed to minimize the impact of stormwater pollutants resulting from construction activities.
(123) STORMWATER QUALITY MANAGEMENT PLAN. A comprehensive written document that addresses stormwater runoff quality.
(124) STORMWATER QUALITY MEASURE. A practice, or a combination of practices, to control or minimize pollutants associated with stormwater runoff.
(125) STORMWATER RUNOFF. The water derived from rains falling within a tributary basin, flowing over the surface of the ground or collected in channels or conduits.
(127) STRIP DEVELOPMENT. A multi-lot project where building lots front on an existing road.
(128) SUBDIVISION. The division of a parcel of land into two or more lots, parcels, tracts, sites, units, plats, or interests for the purpose of offer, sale, lease, transfer or development; either on an installment plan or upon any and all other plans, terms, and conditions, including re-subdivision. SUBDIVISION includes the division of land in any zoning district, whether by deed, metes and bounds description, devise, intestate, lease, map, plat, survey or other recorded instrument.
(129) SUBSURFACE DRAIN. A pervious backfield trench, usually containing stone and perforated pipe, for intercepting groundwater or seepage.
(130) SURFACE RUNOFF. Precipitation that flows onto the surfaces of roofs, streets, the ground, and the like, and is not absorbed or retained by that surface but collects and runs off.
(131) SWALE. An elongated depression in the land surface that is at least seasonally wet, is usually heavily vegetated, and is normally without flowing water. SWALES conduct stormwater into primary drainage channels and may provide some groundwater recharge.
(132) TEMPORARY STABILIZATION. The covering of soil to ensure its resistance to erosion, sliding, or other movement. The term includes vegetative cover, anchored mulch, or other non-erosive material applied at a uniform density of 70% across the disturbed area.
(133) TOPOGRAPHIC MAP. Graphical portrayal of the topographic features of a land area, showing both the horizontal distances between the features and their elevations above a given datum.
(134) TOPOGRAPHY. The representation of a portion of the earth's surface showing natural and man-made features of a given locality such as rivers, streams, ditches, lakes, roads, buildings, and most importantly, variations in ground elevations for the terrain of the area.
(135) TRIBUTARY. Contributing stormwater from upstream land areas.
(136) URBANIZATION. The development, re-development, change or improvement of any parcel of land consisting of one or more lots for residential, commercial, industrial, institutional, recreational, municipal, or public utility purposes.
(137) VINCENNES LEVEE SYSTEM. All flood control works that provide flood protection to the city. Includes the Brevoort Levee Project as determined by the USACE.
(138) WATER QUALITY. A term used to describe the chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose.
(139) WATER RESOURCES. The supply of groundwater and surface water in a given area.
(140) WATERBODY. Any accumulation of water, surface, or underground, natural or artificial, excluding water features designed and designated as water pollution control facilities.
(141) WATERCOURSE. Any river, stream, creek, brook, branch, natural or man-made drainageway in or into which stormwater runoff or floodwaters flow either regularly or intermittently.
(142) WATERSHED. The region drained by or contributing water to a specific point that could be along a stream, lake or other stormwater facilities. WATERSHEDS are often broken down into subareas for the purpose of hydrologic modeling.
(143) WATERSHED AREA. All land and water within the confines of a drainage divide. See also WATERSHED and DRAINAGE AREA.
(144) WETLANDS. Areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions.
(Ord. 7-2006, passed 6-12-06; Am. Ord. 4-2010, passed 5-24-10)