For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
ACCELERATED EROSION. The removal of the surface of the land through the combined action of human activity and the natural processes of a rate greater than would occur because of the natural process alone.
AGRICULTURAL ACTIVITY. Activities associated with agriculture, such as agricultural cultivation, agricultural operation and animal heavy use areas. This includes the work of producing crops including tillage, land clearing, plowing, disking, harrowing, planting, harvesting crops or pasturing and raising of livestock and installation of conservation measures. Construction of new buildings or impervious area is not considered an agricultural activity.
ALTERATION. As applied to land, a change in topography as a result of the moving of soil and rock from one location or position to another; also, the changing of surface conditions by causing the surface to be more or less impervious; or earth disturbance. Alteration includes removal of trees and vegetation in a manner, or to an extent, to increase the rate or volume of stormwater runoff.
APPLICANT. A landowner, developer or other person who has filed an application for approval to engage in any regulated activities as defined in § 151.005.
AS-BUILT PLAN. Plans that are maintained during construction of the project and which document the actual locations of the site improvements. An AS-BUILT PLAN must be prepared by a professional landscape architect, professional land surveyor or professional engineer licensed in the commonwealth of the state.
BANKFULL. The point where water begins to overflow the channel onto a floodplain.
BASE FLOW. The portion of stream flow that is sustained by groundwater discharge.
BEST MANAGEMENT PRACTICE (BMP). Activities, facilities, designs, measures or procedures used to manage stormwater impacts from regulated activities to meet state water quality requirements, promote groundwater recharge and otherwise meet the purposes of this chapter. Stormwater BMPs are commonly grouped into one of two broad categories or measures: “structural” or “non-structural.”
(1) In this chapter, non-structural
BMPs or measures refer to operational and/or behavior-related practices that attempt to minimize the contact of pollutants with stormwater runoff, whereas structural BMPs or measures are those that consist of a physical device or practice that is installed to capture and treat stormwater runoff.
(2) Structural
BMPs include, but are not limited to, a wide variety of practices and devices from large-scale retention ponds and constructed wetlands, to small-scale underground treatment systems, infiltration facilities, filter strips, low impact design, bioretention, wet ponds, permeable paving, grassed swales, riparian or forested buffers, sand filters, detention basins and manufactured devices. Structural stormwater BMPs are permanent appurtenances to the project site.
BMP MANUAL. The Pennsylvania Stormwater Best Management Practices Manual, December 30, 2006 edition, as amended.
CONSERVATION DISTRICT. Bucks County Conservation District.
CULVERT. A pipe, conduit or similar structure, including appurtenant works, which conveys surface water underground and/or under or through an embankment or fill.
DAM. An artificial barrier, together with its appurtenant works, constructed for the purpose of impounding or storing water or another fluid or semifluid, or a refuse bank, fill or structure for highway, railroad, or other purposes which does or may impound water or another fluid or semifluid.
DEP. Pennsylvania Department of Environmental Protection.
DESIGN PROFESSIONAL. A professional engineer, landscape architect or land surveyor licensed in the commonwealth of state and trained to develop stormwater management plans.
DESIGN STORM. The magnitude and temporal distribution of precipitation from a storm event measured in probability of occurrence (e.g. 50-year storm) and duration (e.g. 24-hours), used in the design and evaluation of stormwater management facilities. Also see the definition of RETURN PERIOD.
DESIGNEE. The agent of the Township Board of Supervisors involved with the administration, review or enforcement of any provisions of this chapter by contract or memorandum of understanding.
DETENTION BASIN. An impoundment structure designed to manage stormwater runoff by temporarily storing the runoff and releasing it at a predetermined rate.
DETENTION DISTRICT. Those subareas in which some type of detention is required to meet the plan requirements and goals of Act 167.
DEVELOPER. A person, partnership, association, corporation or other entity, or any responsible person therein or agent thereof, that undertakes a development project and/or any regulated activity.
DEVELOPMENT. Any human-made change to improved or unimproved real estate including, but not limited to, the construction or placement of buildings or other structures, mobile homes, streets and other paving, utilities, mining, dredging, filling, grading, excavation, or drilling operations and the subdivision of land.
DEVELOPMENT PLAN. The provisions for development including a planned residential development, a plat of subdivision, all covenants relating to use, location and bulk of buildings and other structures, intensity of use or density of development, streets, ways and parking facilities, common open space and public facilities. The phrase PROVISIONS OF DEVELOPMENT PLAN when used in this chapter shall mean the written and graphic materials referred to in this definition.
DEVELOPMENT SITE. See the definition of PROJECT SITE.
DISCONNECTED IMPERVIOUS AREA (DIA). Rooftop or other impervious surface, the drainage of which is directed to a pervious area that allows for infiltration, filtration and increased time of concentration.
DISTURBED AREA. Unstabilized land area where an earth disturbance activity is occurring or has occurred.
DOWNSLOPE PROPERTY BOUNDARY. That portion of the property line of the site which is located such that overland or pipe flow from the site would be directed toward it.
DRAINAGE CONVEYANCE FACILITY. A stormwater management facility designed to transmit stormwater runoff, including streams, channels, swales, pipes, conduits, culverts, storm sewers and the like.
DRAINAGE EASEMENT. A right granted by a landowner to a grantee, allowing the use of private land for stormwater management purposes.
DRAINAGEWAY. Any natural or artificial watercourse, trench, ditch, swale, channel or similar depression into which surface water flows.
E&S MANUAL. Pennsylvania Department of Environmental Protection Erosion and Sediment Pollution Control Program Manual, No. 363-2134-008 (March 31, 2012), as amended and updated.
EARTH DISTURBANCE ACTIVITY. Construction or other human activity which disturbs and destabilizes the surface of the land, including, but not limited to, clearing and grubbing, grading, excavations, embankments, development, road maintenance and the moving, depositing, stockpiling or storing of soil, rock or earth materials.
EMERGENCY SPILLWAY. A conveyance area that is used to pass peak discharge greater than the maximum design storm controlled by the stormwater management facility.
ENGINEER. A licensed professional civil engineer registered by the commonwealth of the state.
EROSION. The natural process by which the surface of the land, including channels, is worn away by water, wind or chemical action.
EROSION AND SEDIMENT CONTROL PLAN. A site-specific plan identifying the BMPs to minimize accelerated erosion and sedimentation, pursuant to 25 Pa. Code Chapter 102.
EXCEPTIONAL VALUE WATERS. Surface waters of high quality which satisfy the requirements currently set forth in Pa. Code Title 25, Environmental Protection, Chapter 93, Water Quality Standards, § 93.4b(b) (relating to antidegredation), as amended or replaced from time to time by the DEP.
EXISTING CONDITIONS. The dominant land cover during the five-year period immediately preceding a proposed regulated activity. Farm field, disturbed earth or undeveloped cover conditions of a site or portions of a site used for modeling purposes shall be considered as “meadow,” unless the natural groundcover generates lower curve numbers or Rational “C” value, such as forested land. Existing human-made impervious surfaces shall be considered as meadow when developing cover complex calculations.
FEMA. Federal Emergency Management Agency.
FLOOD. A temporary condition of partial or complete inundation of normally dry land areas from the overflow of streams, rivers, watercourses and other waters of the commonwealth.
FLOODPLAIN. Any land area susceptible to inundation by water from any natural source or delineated by applicable FEMA maps and studies as being a special flood hazard area. This term also includes areas that comprise Group 13 Soils, as listed in Appendix A of the Pennsylvania DEP Technical Manual for Sewage Enforcement Officers (as amended or replaced from time to time by the DEP).
FLOODWAY. The channel of the watercourse and those portions of the adjoining floodplains that are reasonably required to carry and discharge the 100-year frequency flood. Unless otherwise specified, the boundary of the floodway is as indicated on maps and flood insurance studies provided by FEMA. In an area where no FEMA maps or studies have defined the boundary of the 100-year frequency floodway, it is assumed absent evidence to the contrary, that the FLOODWAY extends from the streambank to 50 feet from the top of the bank of the stream.
FOREST MANAGEMENT. Planning and activities necessary for the management of forestland. These include conducting a timber inventory, preparation of forest management plans, silvicultural treatment, cutting budgets, logging road design and construction, timber harvesting, site preparation and reforestation.
FREEBOARD. A vertical distance between the elevation of the design high-water and the top of a dam, levee, tank, basin or diversion ridge. The space is required as a safety margin in a pond or basin.
GRADE. The slope of a street, other public way, land area, drainage facility or pipe specified in percent.
GRASSED SWALE. A natural or constructed swale, usually broad and shallow, covered with erosionresistant grasses, used to conduct surface water.
GREEN INFRASTRUCTURE. Systems and practices that use or mimic natural processes to infiltrate, evapotranspire or reuse stormwater on the site where it is generated.
GROUNDWATER RECHARGE. Replenishment of natural underground water supplies.
HEC-HMS. The United States Army Corps of Engineers, Hydrologic Engineering Center (HEC)-Hydrologic Modeling System (HMS).
HIGH QUALITY WATERS. Surface waters having quality which exceeds levels necessary to support propagation of fish, shellfish and wildlife and support recreation in and on the water as defined by the requirements currently set forth in 25 Pa. Code, Environmental Protection, Chapter 93, Water Quality Standards, § 93.4b(a), as amended or replaced from time to time by DEP.
HYDRIC SOIL. A soil that is saturated, flooded or ponded long enough during the growing season to develop an anaerobic condition in the upper part.
HYDROLOGIC REGIME (NATURAL). The hydrologic cycle or balance that sustains quality and quantity of stormwater, stream baseflow, stormwater storage and groundwater supplies under the natural conditions.
HYDROLOGIC SOIL GROUP (HSG). Infiltration rates of soils vary widely and are affected by subsurface permeability, as well as surface intake rates. Soils are classified into four HSGs (A, B, C and D) according to their minimum infiltration rate, which is obtained for bare soil after prolonged wetting. The NRCS defines the four groups and provides a list of most of the soils in the United States and their group classification. The soils in the area of the development site may be identified from a soil survey report that can be obtained from local NRCS offices or onservation district offices. Soils become less pervious as the HSG varies from A to D. (NRCS1, 2)
IMPERVIOUS SURFACE (IMPERVIOUS AREA). A surface that prevents the infiltration of water into the ground. IMPERVIOUS SURFACES (or areas) shall include, but not be limited to, roofs, additional indoor living spaces, patios, garages, storage sheds, pools, any similar structures and any new streets or sidewalks. Decks, parking areas and driveway areas are not counted as IMPERVIOUS AREAS if they are designed and constructed as a BMP so that they promote infiltration.
IMPOUNDMENT. A retention or detention basin designed to retain and/or infiltrate stormwater runoff and release it at a controlled rate.
INFILTRATION. The passing of stormwater through the soil from the surface.
INFILTRATION STRUCTURE. A structure designed to direct runoff into the ground (e.g. French drains, seepage pits, seepage trench, biofiltration swale, infiltration basins and the like).
INLET. A surface connection to a closed drain; a structure at the diversion end of a conduit; the upstream end of any structure through which water may flow.
INVERT. The inside bottom of a culvert or other conduit.
LAND DEVELOPMENT. Inclusive of any or all of the following meanings:
(1) The improvement of one or two or more contiguous lots, tracts or parcels of land for any purpose involving:
(a) A group of two or more residential or nonresidential buildings, whether purposed initially or cumulatively, or a single nonresidential building on a lot or lots regardless of the number of occupants or tenure; or
(b) The division or allocation of land or space, whether initially or cumulatively, between or among two or more existing or prospective occupants by means of, or for the purpose of streets, common areas, leaseholds, condominiums, building groups or other features.
(2) A subdivision of land;
(3) Development in accordance with the Pennsylvania Municipalities Planning Code § 503(1.1); and
(4) LAND DEVELOPMENT does not include development which involves the following:
(a) The conversion of an existing single-family detached dwelling or single-family semi-detached dwelling into not more than three residential units, unless such units are intended to be a condominium;
(b) The addition of a residential accessory building, including farm building, on a lot or lots subordinate to an existing principal building; or
(c) The addition or conversion of buildings or rides within the confines of an enterprise which would be considered an amusement park. For the purposes of this definition, an “amusement park” is defined as a tract or area used principally as a location for permanent amusement structures or rides. This exclusion shall not apply to newly acquired acreage by an amusement park until initial plans for the expanded area have been approved by the proper authorities.
LIMITING ZONE. A soil horizon or condition in the soil profile or underlying strata which includes one of the following:
(1) A seasonal high-water table, whether perched or regional, determined by direct observation of the water table or indicated by soil mottling;
(2) A rock with open joints, fracture or solution channels or masses of loose rock fragments,
including gravel, with insufficient fine soil to fill the voids between the fragments; and/or
(3) A rock formation, other than stratum or soil condition which is so slowly permeable that it effectively limits downward passage of effluent.
LOW IMPACT DEVELOPMENT (LID). Site design approaches and small-scale stormwater management practices that promote the use of natural systems for infiltration, evapotranspiration and reuse of rainwater. LID can be applied to new development, urban and suburban retrofits and revitalization projects. LID utilizes design techniques that infiltrate, filter, evaporate and store runoff close to its source. Rather than rely on costly large-scale conveyance and treatment systems, LID addresses stormwater through a variety of small, cost-effective landscape features located on-site.
MANNING EQUATION (MANNING FORMULA). A method for calculation of velocity of flow (feet per second) and flow rate (cubic feet per second) in open channels based upon channel shape, roughness, depth of flow and slope. Open channels may include closed conduits when the flow is not under pressure.
MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4). A system of conveyances owned by a state, city, town or other public entity that include catch basins, curbs, gutters, ditches, human-made channels, pipes, tunnels or storm drains that discharge into waters of the United States.
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES). A provision of the Clean Water Act, 33 U.S.C. §§ 1251 et seq., that prohibits discharge of pollutants into waters of the United States unless a special permit is issued by the United States Environmental Protection Agency (EPA), or a state or a tribal government.
NONPOINT SOURCE POLLUTION. Pollution that enters a body of water from diffuse origins in the watershed and does not result from discernible, confined or discrete conveyances.
NRCS. USDA Natural Resource Conservation Service (previously SCS).
OPEN CHANNEL. A drainage element in which stormwater flows with an open surface. OPEN CHANNELS include, but shall not be limited to, natural and human-made drainageways, swales, streams, ditches, canals and pipes flowing partly full.
OUTFALL. An outfall is defined as any point where a separate storm sewer system discharges to either waters of the United States or to another MS4. OUTFALLS include discharges from pipes, ditches, swales and other points of concentrated flow.
PARENT TRACT. The parcel of land from which a land development or subdivision originates as of the date of adoption of this chapter.
PEAK DISCHARGE. The maximum rate of stormwater runoff from a specific storm event.
PENNDOT. The Pennsylvania Department of Transportation.
PERSON. An individual, partnership, association, corporation or other entity.
PERVIOUS AREA. Any area not defined as impervious.
PIPE. A culvert, closed conduit or similar structure (including appurtenances) that conveys stormwater.
POINT SOURCE. Any discernible, confined and discrete conveyance, including, but not limited to, any pipe, ditch, channel, tunnel or conduit from which stormwater is or may be discharged, as defined in state regulations at 25 Pa. Code § 92.1.
PRETREATMENT. Techniques employed in stormwater BMPs to provide storage or filtering to trap coarse materials and other pollutants before they enter the stormwater management system.
PROJECT SITE. The specific tract of land where any regulated activity in the township is planned, conducted or maintained.
QUALIFIED PROFESSIONAL. Any person licensed by the Pennsylvania Department of State or otherwise qualified by law to perform the work required by this chapter.
RATIONAL FORMULA. A rainfall-runoff relation used to estimate peak flow.
RECHARGE AREA. Undisturbed surface area or depression where stormwater collects, a portion of which infiltrates and replenishes groundwater.
REGULATED ACTIVITY. Any activity to which this chapter is applicable pursuant to § 151.005.
REGULATED EARTH DISTURBANCE ACTIVITY. Activity subject to regulation under 25 Pa. Code § 92, 25 Pa. Code § 102, or the State Clean Streams Law, 35 P.S. § 691.1 et seq.
RECHARGE VOLUME. A calculated volume of stormwater runoff from impervious areas which is required to be infiltrated at a site and may be achieved through use of structural or non-structural BMPs.
RELEASE RATE. The percentage of predevelopment peak rate of runoff from a site or subarea to which the post development peak rate of runoff must be reduced to protect downstream areas.
REMOVED RUNOFF. The volume of runoff that is captured and not released directly into the surface waters of the commonwealth during or after a storm event.
RETENTION BASIN. A basin designed to collect and hold and/or infiltrate stormwater runoff so that a permanent pool is established.
RETENTION VOLUME/REMOVED RUNOFF. The volume of runoff that is captured and not released directly into the surface waters of the commonwealth during or after a storm event.
RETURN PERIOD. The average interval, in years, within which a storm event of a given magnitude can be expected to recur. For example, the 25-year RETURN PERIOD rainfall would be expected to recur on the average once every 25 years; or, stated another way, the probability of a 25-year storm occurring in any one year is 0.04 (being a 4% chance).
RIPARIAN BUFFER. A permanent area of trees and shrubs located adjacent to intermittent and perennial streams, lakes, ponds or wetlands.
RIPARIAN CORRIDOR. A vegetated ecosystem along a waterbody that serves to buffer the waterbody from the effects of runoff by providing water quality filtering, bank stability, recharge, rate attenuation and volume reduction and shading of the waterbody by vegetation. Riparian corridors also provide habitat and may include streambanks, riparian buffers, wetlands, floodplains and transitional areas.
RISER. A vertical pipe extending from the bottom of a pond or basin that is used to control the discharge rate from the pond or basin for a specified design storm.
RUNOFF. Any part of precipitation that flows over the land.
SEDIMENT. Soils or other materials transported by surface water as a product of erosion.
SEDIMENT BASIN. A barrier, dam or retention or detention basin located and designed to retain rock, sand, gravel, silt or other material transported by water.
SEDIMENT POLLUTION. The placement, discharge or any other introduction of sediment into the waters of the commonwealth.
SEDIMENTATION. The process by which mineral or organic matter is accumulated or deposited by the movement of water.
SEPARATE STORM SEWER SYSTEM. A system of pipes, open channels, streets and other conveyances intended to carry stormwater runoff.
SHEET FLOW. Runoff that flows over the ground surface as a thin, even layer, not concentrated in a channel.
SITE. The specific tract(s) of land where any regulated activity is planned, proposed, conducted or maintained.
SOIL-COVER COMPLEX METHOD. A method of runoff computation developed by the NRCS that is based on relating soil type and land use/cover to a runoff parameter called a curve number (CN).
STATE WATER QUALITY REQUIREMENTS. The regulatory requirements to protect, maintain, reclaim and restore water quality under 25 Pa. Code and the State Clean Streams Law.
STORM FREQUENCY. The number of times that a given storm event occurs or is exceeded on the average in a stated period of years. Refer the definition of RETURN PERIOD.
STORM SEWER. A system of pipes and/or open channels that convey intercepted runoff and stormwater from other sources, but excludes domestic sewage and industrial wastes.
STORMWATER. Drainage runoff from the surface of the land resulting from precipitation or snow or ice melt.
STORMWATER MANAGEMENT FACILITY. Any structure, natural or human-made, that, due to its condition, design, or construction, conveys, stores or otherwise affects stormwater runoff. Typical stormwater management facilities include, but are not limited to, detention and retention basins, open channels, storm sewers, pipes, infiltration structures and other BMPs.
STORMWATER MANAGEMENT PERMIT. A permit issued by the township after the SWM site plan has been approved. Said permit is issued prior to or with the final township approval of the proposed development activity.
STORMWATER MANAGEMENT PLAN. The plan for managing stormwater runoff within the township adopted as required by the Act of October 4, 1978, Pub. L. No. 864, (Act 167), as amended and known as the “Stormwater Management Act.”
STORMWATER MANAGEMENT SITE PLAN (SWM SITE PLAN). The plan prepared by a developer or its engineer indicating how stormwater runoff will be managed at the development site in accordance with this chapter. The STORMWATER MANAGEMENT SITE PLAN will be designated as SWM SITE PLAN throughout this chapter.
STREAM OR WATERCOURSE. Rivers, creeks, springs and other perennial or intermittent watercourses containing water at least on a seasonal basis during an average water year. The term STREAM shall include all of the following:
(1) SPRINGS OR SEEPS. The point where groundwater discharges to become surface water.
(2) STREAM, EPHEMERAL. A reach of stream that flows only during and for short periods following precipitation, and flows in low areas that may or may not be a well-defined channel. EPHEMERAL STREAM beds are located above the water table year-round. Groundwater is not a source of water for the STREAM. Some commonly used names for EPHEMERAL STREAMS include stormwater channel, drain, swale, gully, dry stream channel, hollow or saddle.
(3) STREAM, HEADWATER. The beginning reach of a stream, which collects water from springs and seeps and provides a hydrologic connection to a perennial stream. These channels may be ill-defined and may move from year to year depending upon groundwater input, snowmelt and runoff, but are typified by hydric soils and hydric vegetation.
(4) STREAM, INTERMITTENT. A reach of stream that flows only during wet periods of the year and flows in a continuous well-defined channel. During dry periods, when the water table is depressed by seasonal aridity or drought, INTERMITTENT STREAMS may go down to a trickle of water and appear dry, when in fact there is water flowing within the stream bottom or substrate.
(5) STREAM, PERENNIAL. A body of water in a channel that flows throughout a majority of the year in a defined channel and is capable, in the absence of pollution, drought or human-made stream disturbances, of supporting a benthic macroinvertebrate community that is composed of two or more recognizable taxonomic groups of organisms, large enough to be seen by the unaided eye and can be retained by a United States Standard No. 30 sieve (28 meshes per inch, 0.595 millimeter openings) and live at least part of their life cycles within or upon available substrates in a body of water or water transport system. A PERENNIAL STREAM can have Q7-10 flow of zero. For the purposes of this chapter, a PERENNIAL STREAM includes rivers, lakes, ponds and other permanent surface water bodies.
STREAM ENCLOSURE. A bridge, culvert or other structure in excess of 100 feet in length upstream to downstream which encloses a regulated water of this commonwealth.
SUBAREA. The smallest drainage unit of a watershed for which stormwater management criteria have been established in the stormwater management plan.
SUBDIVISION. As defined in the Pennsylvania Municipalities Planning Code, Act of July 31, 1968, Pub. L. 805, No. 247.
SURVEYOR. A licensed professional land surveyor registered by the commonwealth of the state.
SWALE. A low-lying stretch of land which gathers or carries surface water runoff.
TIME OF CONCENTRATION (Tc). The time for surface runoff to travel from the hydraulically most distant point of the watershed to a point of interest within the watershed. This time is the combined total of overland flow time and flow time in pipes or channels, if any.
TOWNSHIP. Bedminster Township, Bucks County, Pennsylvania.
TOWNSHIP ENGINEER. A professional engineer licensed in the commonwealth of the state and appointed by the township pursuant to the Pennsylvania Second Class Township Code Article V, 53 P.S. §§ 65101 et seq.
TRIBUTARY AREA. The portion of a watershed that contributes runoff to a particular point in that watershed.
USDA. United States Department of Agriculture.
VOLUMETRIC RUNOFF COEFFICIENT. A variable indicative of stormwater runoff volume and dependent on the impervious coverage for a site.
WATER QUALITY REQUIREMENTS. As defined under state regulations, protection of designated and existing uses (Refer 25 Pa. Code Chapters 93 and 96):
(1) Each stream segment in state has a designated use, such as cold water fishery or potable water supply, which are listed in 25 Pa. Code Chapter 93. These uses must be protected and maintained under state regulations;
(2) Existing uses are those attained as of November 1975, regardless whether they have been designated in 25 Pa. Code Chapter 93. Land development must be designed to protect and maintain existing uses and maintain the level of water quality necessary to protect those uses in all streams, and to protect and maintain water quality in special protection streams; and
(3) Water quality involves the chemical, biological and physical characteristics of surface water bodies. After land development, these characteristics can be impacted by addition of pollutants such as sediment, and changes in habitat through increased flow volumes and/or rates. Therefore, discharge to surface waters must be designed and managed to protect the streambank, streambed and structural integrity of the waterway to prevent these impacts.
WATERS OF THE COMMONWEALTH. Any and all rivers, streams, creeks, rivulets, impoundments, ditches, watercourses, storm sewers, lakes, dammed water, wetlands, ponds, springs and all other bodies or channels of conveyance of surface and underground water, or parts thereof, whether natural or artificial, within or on the boundaries of this commonwealth.
WATERSHED. Region or area bounded peripherally by water parting and draining to a particular watercourse or body of water.
WETLAND. Areas that are inundated or saturated by surface 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, including swamps, marshes, bogs, fens and similar areas.
(Ord. 239, passed 10-14-2020)