[Ord. 2022-3, 9/12/2022]
1.
For the
purpose of this Chapter, the following rules of construction apply:
A.
Words
used in the present tense include the future tense; the singular number
includes the plural; and the plural includes the singular; words of
masculine gender include feminine gender; and words of feminine gender
include masculine gender.
B.
The
word “includes” or “including” shall not limit
the term to the specific example but is intended to extend its meaning
to all other instances of like kind and character.
C.
The
word “person” includes an individual, firm, association,
organization, partnership, trust company, corporation, or any other
similar entity.
D.
The
words “shall” and “must” are mandatory; the
words “may” and “should” are permissive.
E.
The
word “used” or “occupied” includes the words
“intended, designed, maintained or arranged to be used, occupied
or maintained.”
F.
The
words “watershed,” “sub-watershed” and “drainage
area” are synonymous and refer to the contributing area of interest.
G.
References
to codes, ordinances, resolutions, plans, maps, standards, regulations,
statutes, documents, lists, governmental bodies, commissions or agencies
or officials are to codes, ordinances, resolutions, plans, maps, standards,
regulations, statutes, documents, lists, governmental bodies, commissions
or agencies or officials of the Borough or of the Commonwealth of
Pennsylvania as in effect or office from time to time, including amendments
thereto or revisions or successors thereof, unless the text indicates
another reference is intended. It is the intent of the Borough that
this Chapter be interpreted in accordance with §1937 of the Statutory
Construction Act, 1 Pa. C.S. §1937.
[Ord. 2022-3, 9/12/2022]
For the purpose of this Chapter, certain terms and words used
herein shall be interpreted as follows:
The flood, also known as the base flood, which has a 1% chance
of being equaled or exceeded in any given year; the flood which has
been selected to serve as the basis upon which the floodplain management
provisions of this and other ordinances have been prepared.
The removal of the surface of the land through the combined
action of man’s activities and the natural process at a rate
greater than would occur because of the natural process alone.
Activities associated with agriculture such as cultivation
of soil, farming, dairying, pasturage, agriculture, horticulture,
floriculture, forestry, viticulture, and animal and poultry husbandry
and the necessary accessory uses for packing, treating, or storing
the produce and equipment. Construction of new buildings or impervious
area is not considered an agricultural activity.
As applied to land, a change in topography resulting from
the moving of soil and rock from one location or position to another;
the changing of surface conditions by causing the surface to be more
or less impervious; land disturbance.
A landowner or developer, as hereinafter defined, who has
filed an application for approval to engage in any regulated activities
at a project site within Cornwall Borough, including his heirs, successors,
and assigns.
Activities, facilities, measures, planning, or procedures
used to manage stormwater impacts from regulated activities, to meet
State water quality requirements, to promote groundwater recharge
and to otherwise meet the purposes of this Chapter. Stormwater BMPs
are commonly grouped into one of two broad categories or measures:
“nonstructural” or “structural.” “Nonstructural”
BMPs are measures referred to as operational and/or behavior-related
practices that attempt to minimize the contact of pollutants with
stormwater runoff whereas “structural” BMPs are measures
that consist of a physical device or practice that is installed to
capture and treat stormwater runoff. “Structural” BMPs
include, but are not limited to, a wide variety of practices and devices,
from large-scale wet 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.
Guides, grids, grating, earthen berms, or similar devices
placed in a pond to deflect or regulate flow and create a longer flow
path.
A water quality practice that utilizes landscaping and soils
to treat stormwater runoff by collecting it in shallow depressions
before filtering through a fabricated planting soil media.
The Pennsylvania Stormwater Best Management Practices Manual
as published by the Department of Environmental Protection, Bureau
of Watershed Management, document number: 363-0300-002, effective
date: December 30, 2006.
Cornwall Borough, Lebanon County, Pennsylvania.
Cornwall Borough Council.
A registered engineer designated by the Borough to perform
duties as required by this Chapter on behalf of Cornwall Borough.
For the purpose of this Chapter a bridge is defined as a
stormwater conveyance structure requiring an effective span or diameter
exceeding six feet.
Limestone or dolomite bedrock, also marble (within graphitic
felsic gneiss fm).
Chapter 102 of the regulation of DEP, 25 Pa. Code Chapter
102, Erosion and Sediment Control.
Chapter 105 of the regulation of DEP, 25 Pa. Code Chapter
105, Dam Safety and Waterway Management.
An earthen, stone or log structure, used in grass swales
to reduce water velocities, promote sediment deposition, and enhance
infiltration.
Act of June 22, 1937, P.L. 187, as amended, 35 P.S. §691.101
et seq.
The Commonwealth of Pennsylvania.
The Lebanon County Conservation District (LCCD). The Lebanon
County Conservation District has the authority under a delegation
agreement executed with the Pennsylvania Department of Environmental
Protection to administer all or a portion of the erosion and sediment
control program and construction activities within the political boundaries
of Lebanon County, Pennsylvania, including Cornwall Borough.
Includes the building, reconstruction, extension, expansion,
alteration, substantial improvement, or erection or relocation of
a building or structure, including manufactured homes, and gas or
liquid storage tanks. For floodplain purposes, “new construction”
includes structures for which the “start of construction”
commenced on or after the effective date of a floodplain management
regulation adoption by the Borough.
The ability of a pipe, culvert, swale, or other similar facility
to carry the peak flow from the design storm.
A stormwater management facility designed to convey stormwater
runoff and shall include streams, channels, swales, pipes, conduits,
culverts, storm sewers, etc.
Lebanon County, Pennsylvania.
A structure with appurtenant works that carries a stream
and/or stormwater runoff under or through an embankment or fill.
An artificial barrier, together with its appurtenant works,
constructed for the purpose of impounding or storing water or another
fluid or semi-fluid, or a refuse bank, fill or structure for highway,
railroad or other purposes which does or may impound water or another
fluid or semi-fluid.
The Pennsylvania Department of Environmental Protection or
any successor agency thereto.
The Pennsylvania Department of Transportation or any successor
agency thereto.
The magnitude and temporal distribution of precipitation
from a storm event measured in probability of occurrence (e.g., a
twenty-five-year storm) and duration (e.g., 24 hours), used in the
design and evaluation of stormwater management systems. Also see “Return
period.”
An impoundment structure designed to manage stormwater runoff
by temporarily storing the runoff and releasing it at a predetermined
rate.
A vegetated pond designed to collect water runoff for a given
storm event and release it at a predetermined rate; also known as
a “dry pond.”
A person, partnership, association, corporation, or other
entity, or any responsible person therein or agent thereof, that undertakes
any regulated activity of this Chapter.
Any manmade change to improved or unimproved real estate,
including but not limited to buildings or other structures, filling,
grading, paving, excavating, earth disturbance activity, mining, dredging,
or drilling operations, the placement of manufactured homes, streets
and other paving, utilities, and the subdivision of land.
An unstabilized land area where an earth disturbance activity
is occurring or has occurred.
That portion of the property line of the lot, tract, or parcels
of land being developed located such that overland or piped flow from
the site would be directed toward it.
A right granted by a landowner to a grantee, allowing the
use of private land for stormwater management, drainage, or conveyance
purposes.
A construction or other human activity which disturbs the
surface of the land, including, but not limited to, clearing and grubbing,
grading, excavations, embankments, land development, mineral extraction,
and the moving, depositing, stockpiling, or storing of soil, rock,
or earth materials.
A device used to slow the velocity of stormwater particularly
at points of concentrated discharge such as pipe outlets.
The natural process by which the surface of the land is worn
away by water, wind or chemical action.
A site specific plan consisting of both drawings and narrative
that identifies BMPs that minimize accelerated erosion and sediment
pollution before, during and after earth disturbance activities.
Pennsylvania Department of Environmental Protection, Technical
Guidance No. 363-2134-008, March 2012.
Any act by which earth, sand, gravel, rock, or any other
similar material is dug into, cut, quarried, uncovered, removed, displaced,
relocated, or bulldozed. It shall include the conditions resulting
therefrom.
Surface waters of high quality, which satisfies 25 Pa. Code
Chapter 93 – Water Quality Standards, §93.4b(b).
All existing pervious land cover shall be considered as “meadow”
unless the natural land cover is documented to generate lower curve
numbers or rational “C” coefficients, such as forested
lands.
A stormwater design feature that provides for the gradual
release of a volume of water in order to increase settling of pollutants
and protect downstream channels from frequent storm events.
Federal Emergency Management Agency or any agency successor
thereto.
Any act by which earth, sand, gravel, rock or any other material
is placed, pushed, dumped, pulled, transported or moved to a new location
above the natural surface of the ground or on top of the stripped
surface and shall include the conditions resulting therefrom; the
difference in elevation between a point on the original ground and
a designated point of higher elevation on the final grade; the material
used to make fill.
A strip of permanent vegetation above ponds, diversions,
and other structures to retard the flow of runoff, causing deposition
of transported material, thereby reducing sedimentation.
A relatively flat or low land area which is subject to partial
or complete inundation from an adjoining or nearby stream, river,
or watercourse; and/or any area subject to the unusual and rapid accumulation
of surface waters from any natural source; and/or any land delineated
as a special flood hazard area (SFHA) on applicable FEMA maps and
studies.
 |
The channel of 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 top of
the bank to 50 feet away from the stream.
Planning and activities necessary for the management of forest
land. These include timber inventory and preparation of forest management
plans, silvicultural treatment, cutting budgets, logging road design
and construction, timber harvesting, site preparation and reforestation.
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.
The slope expressed in a percent that indicates the rate
of change of elevation in linear feet per 100 linear feet.
The act of moving earth. Changing of the earth surface by
excavation or fill.
A natural or constructed waterway, usually broad and shallow,
covered with erosion-resistant grasses, often used to conduct surface
water from cropland.
Systems and practices that use or mimic natural processes
to infiltrate, evapotranspire, or reuse stormwater in the site where
it is generated.
Replenishment of existing natural underground water supplies.
Surface waters having quality, which exceeds levels necessary
to support propagation of fish, shellfish, and wildlife and recreation
in and on the water by satisfying 25 Pa. Code Chapter 93 – Water
Quality Standards, §93.4b(a).
A graph showing the rate of flow (discharge) versus time
past a specific point in a river or other channel or conduit carrying
flow, or to a point of interest. The rate of flow is typically expressed
in cubic meters or cubic feet per second (cms or cfs).
A classification of soils by the Natural Resources Conservation
Service into 1 of 4 HSG classifications (A, B, C, and D) according
to their minimum infiltration rate, which is obtained for bare soil
after prolonged wetting. The Natural Resources Conservation Service
(NRCS) of the United States Department of Agriculture (USDA) 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 interest
may be identified from a soil survey report generated by the use of
the NRCS Web Soil Survey at http://websoilsurvey.nrcs.usda.gov. Soils become less pervious as the HSG varies from A to D.
Any surface that prevents percolation of water into the ground.
All structures, buildings, parking areas, driveways, roads, sidewalks
and any other areas concrete, asphalt, stone, or gravel shall be considered
impervious surface. In addition, all other areas as determined by
the Borough Engineer to be impervious within the meaning of this definition
shall also be considered impervious surface.
A retention or detention basin designed to retain stormwater
runoff and release it at a controlled rate.
Any structure or paving placed upon land, including the provision
of underground or above-ground utilities, as well as any physical
change to the surface of the land, including but not necessarily limited
to grading, paving, the placement of stormwater management facilities,
sidewalks, street signs, traffic control devices, and monuments. This
definition shall expressly exclude the tilling of soil.
Structural BMPs designed to direct runoff into the ground
(e.g., dry well/seepage pit, rain garden, infiltration trench, infiltration
basin, pervious pavement with infiltration bed, vegetated swale, etc.).
A surface connection to a closed drain. A structure at the
diversion of a conduit. The upstream end of any structure through
which water may flow.
A type of topography or landscape characterized by surface
depressions, sinkholes, rock pinnacles/uneven bedrock surface, steep-sided
hills, underground drainage, and caves. Karst is formed on carbonate
rocks, such as limestone, dolomites, marble and sometimes gypsum.
As defined in Chapter 13, Subdivision and Land Development.
The legal or beneficial owner or owners of land including
the holder of an option or contract to purchase (whether or not such
option or contract is subject to any condition), a lessee if he is
authorized under the lease to exercise the rights of the landowner,
or other person having a proprietary interest in land.
A level structural device providing a smooth, stable surface
such as concrete or similar nondegradable material which effectively
distributes stormwater uniformly over the ground surface as sheet
flow to prevent concentrated, erosive flows and promote infiltration.
Professional engineers, landscape architects, geologists,
and land surveyors licensed to practice within the Commonwealth of
Pennsylvania.
An outline shown on the erosion and sediment pollution control
and stormwater management site plan indicating the boundary of the
total area to be disturbed during a proposed earth disturbance activity.
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 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.
A method for calculation of velocity of flow (e.g., feet
per second) and flow rate (e.g., cubic feet per second) in open channels
based upon channel shape, roughness, depth of flow and slope. “Open
channels” may include closed conduits so long as the flow is
not under pressure.
Cornwall Borough, Lebanon County, Pennsylvania.
The national system for the issuance of permits under §402
of the Federal Clean Water Act (33 USC 1342) including a state or
interstate program which has been approved in whole or in part by
the Environmental Protection Agency, including the regulations codified
in 25 Pa. Code Chapter 92a (NPDES permitting, monitoring and compliance)
and Chapter 102.
The pattern of surface and stormwater drainage from a particular
site before construction or installation of improvements or prior
to any regrading.
Precipitation-Frequency Atlas of the United States, Atlas
14, Volume 2, US Department of Commerce, National Oceanic and Atmospheric
Administration, National Weather Service, Hydrometeorological Design
Study Center, Silver Spring, Maryland (2004). NOAA’s Atlas 14
can be accessed at Internet address: http://hdsc.nws.noaa.gov/hdsc/pfds/.
Pollution that enters a water body from diffuse origins in
the watershed and does not result from discernible, confined, or discrete
conveyances.
A permit required for the discharge or potential discharge
of stormwater into waters of the Commonwealth from construction activities,
including clearing and grubbing, grading and excavation activities
involving one acre or more of earth disturbance activity or an earth
disturbance activity on any portion, part, or during any stage of
a larger common plan of development that involves one acre or more
of earth disturbance activity over the life of the project.
Natural Resources Conservation Service. Previously Soil Conservation
Service (SCS).
A drainage element in which stormwater flows with an open
surface. Open channels include, but shall not be limited to, natural
and manmade drainageways, swales, streams, ditches, canals, and pipes
flowing partly full.
Points of water disposal from a stormwater conveyance system,
stream, river, lake, tidewater, or artificial drain.
All contiguous land held in single and separate ownership,
regardless whether (A) such land is divided into one or more lots,
parcels, purports or tracts; (B) such land was acquired by the landowner
at different times or by different deeds, devise, partition or otherwise;
or (C) such land is bisected by public or private streets or right-of-way,
which was held by the landowner or his predecessor in title on December
17, 2012.
Involves the use of impervious or semi-impervious parking
areas as temporary impounds with controlled release rates during rainstorms.
The maximum rate of stormwater runoff from a specific storm
event.
The Act of July 31, 1968, P.L. 805, No. 247, as reenacted
and amended by the Act of December 21, 1988, P.L. 1329, No. 170, amended,
53 P.S. §10101 et seq.
An individual, partnership, public or private association
or corporation, or a governmental unit, public utility, or any other
legal entity whatsoever which is recognized by law as the subject
of rights and duties.
Any area not defined as impervious.
A culvert, closed conduit, or similar structure (including
appurtenances) that conveys stormwater.
A discernible, confined, and discrete conveyance, including,
but not limited to, any pipe, ditch, channel, tunnel, conduit, well,
discrete fissure, container, rolling stock, concentrated aquatic animal
production facility, concentrated animal feeding operation, landfill
leachate collection system, or vessel or other floating craft, from
which pollutants are or may be discharged, as defined in State regulations
at 25 Pa. Code §92a.2.
Any contaminant or other alteration of the physical, chemical,
biological or radiological integrity of surface water which causes
or has the potential to cause pollution as defined in the Clean Streams
Law.
Contamination of any surface waters that will create or is
likely to create a nuisance or render such waters harmful, detrimental
or injurious to public health, safety or welfare, or to domestic,
municipal, commercial, industrial, agricultural, recreational, or
other legitimate beneficial uses, or to livestock, wild animals, birds,
fish or other aquatic life, including but not limited to such contamination
by alteration of the physical, chemical or biological properties of
such waters or change in temperature, taste, color or odor thereof,
or the discharge of any liquid, gaseous, radioactive, solid or other
substances into such waters.
The specific area of land where any regulated activities
are planned, conducted, or maintained and within the jurisdiction
of this Chapter.
Any person licensed by the Pennsylvania Department of State
or otherwise qualified by law to perform the work required by this
Chapter.
A rainfall-runoff relation used to estimate peak flow.
The portion of the water quality volume used to maintain
groundwater recharge rates at development sites.
Any earth disturbance activities or any activities that involve
the alteration or development of land in a manner that may affect
stormwater runoff and activities that may contribute nonstormwater
runoff discharges to a regulated small MS4. “Regulated activities”
include, but are not limited to, the following listed items:
Earth disturbance activities.
Land development.
Subdivision.
Construction of new or additional impervious or semi-impervious
surfaces.
Construction of new buildings or additions to existing buildings.
Diversion or piping of any natural or manmade stream channel.
Installation of new or modification of existing stormwater management
facilities or appurtenances thereto.
Installation of new or modification of existing stormwater BMPs.
Changes in soil absorption caused by compaction during development
or timber harvesting.
Redirection or concentration of runoff to adjoining properties,
as it relates to properties regulated under this Chapter.
Modification in contours, including filling and/or draining
of low areas, as it relates to properties regulated under this Chapter.
Activity involving earth disturbance subject to regulation
under 25 Pa. Code Chapters 92a and 102, or the Clean Streams Law.
The percentage, or event criteria of the predevelopment peak
rate of runoff from a site or subwatershed area to which the post-development
peak rate of runoff must be reduced to protect downstream areas.
The volume of runoff that is captured and not released directly
into the surface waters of the Commonwealth during or after a storm
event.
A pond containing a permanent pool of water designed and/or
constructed to store water runoff for a given storm event and release
it at a predetermined rate.
The average interval, in years, within which a storm event
of a given magnitude can be expected to recur. For example, the probability
of a twenty-five-year storm occurring in any one given year is 0.04
(i.e., a 4% chance).
A permanent vegetated area bordering surface waters, that
serves as a protective filter to help protect streams and wetlands
from impacts of adjacent land uses.
A vertical structure extending from the bottom of a pond
that is used to control the discharge rate from the pond for a specified
design storm.
Temporary ponding and gradual release of stormwater falling
directly onto flat roof surfaces by incorporating controlled-flow
roof drains into building designs.
Any part of precipitation that flows over the land surface.
The volume of runoff that is captured (retained) and not
released into surface waters of the Commonwealth during or after a
storm event.
Soils or other erodible materials transported by stormwater
as a product of erosion.
An impoundment being used to remove sediment from stormwater
runoff.
The placement, discharge, or any other introduction of sediment
into the waters of the Commonwealth occurring from the failure to
design, construct, implement, or maintain control measures and control
facilities in accordance with the requirements of this Chapter.
The process by which mineral or organic matter is accumulated
or deposited by the movement of air or water.
An area of excavated earth filled with loose stone or similar
course material, into which water is directed for infiltration into
the ground.
A conveyance or system of conveyances (including roads with
drainage systems, Borough streets, catch basins, curbs, gutters, ditches,
manmade channels, or storm drains) primarily used for collecting and
conveying stormwater runoff.
Runoff pattern following sheet flow, prior to open channel
flow.
Runoff flow that occurs overland in places where there are
no defined channels, the flood water spreads out over a large area
at a uniform depth. This also referred to as overland flow.
Physical additions or changes to the land that may be necessary
to provide usable and desirable lots, including, but not limited to,
utilities, streets, curbing, sidewalks, streetlights, and stormwater
facilities.
Deviation of any surface from horizontal. For engineering
purposes, slopes are usually expressed in a percentage based upon
vertical difference in feet per 100 feet of horizontal distance.
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 “curve number” (“CN”).
A depression in the embankment of a pond or basin, or other
overflow structure, that is used to pass peak discharges greater than
the maximum design storm controlled by the pond or basin.
The proper placing, grading, constructing, reinforcing, lining,
and covering of soil, rock or earth to ensure its resistance to erosion,
sliding or other movement.
The regulatory requirements to protect, maintain, reclaim,
and restore water quality under Title 25 of the Pennsylvania Code
and the Clean Streams Law – including, but not limited to:
Each stream segment in Pennsylvania has a “designated
use,” such as “cold water fishery” or “potable
water supply,” which is listed in Chapter 93. These uses must
be protected and maintained, under State regulations.
“Existing uses” are those attained as of November
1975, regardless of whether they have been designated in Chapter 93.
Earth disturbance activities 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.
Water quality involves the chemical, biological, and physical
characteristics of surface water bodies. After earth disturbance activities
are complete, these characteristics can be impacted by addition of
pollutants such as sediment, and changes in habitat through increased
flow volumes and/or rates as a result of changes in land surface area
from those activities. Therefore, permanent discharges to surface
waters must be managed to protect the stream bank, stream bed, and
structural integrity of the waterway, to prevent these impacts.
Protection and maintenance of water quality in special protection
streams pursuant to 25 Pa. Code Chapter 93.
A reservoir routing procedure based on solution of the continuity
equation (inflow minus outflow equals the change in storage) with
outflow defined as a function of storage volume and depth.
The number of times that a given storm “event”
occurs or is exceeded on the average in a stated period of years.
A system of pipes and/or open channels that convey intercepted
runoff and stormwater from other sources but excludes domestic sewage
and industrial wastes.
Drainage runoff from the surface of the land resulting from
precipitation or snow or ice melt.
Any storm drainage technique that retards or detains runoff,
such as detention or retention basins, parking lot storage, rooftop
detention, porous pavement, dry wells, or any combination thereof.
A vegetated pond designed to drain completely after storing
runoff only for a given storm event and release it at a predetermined
rate; also known as a “dry pond.”
A program of controls and measures designed to regulate the
quantity and quality of stormwater runoff from a development while
promoting the protection and conservation of groundwater and groundwater
recharge.
The Act of October 4, 1978, P.L. 864, No. 167, as amended,
32 P.S. §680.1 et seq.
A watershed or subwatershed area for which separate stormwater
management regulations or criteria have been established.
A system designed to handle stormwater runoff, and where
required, delay the peak discharge long enough to minimize the potential
for downstream flooding. Any structure, natural or manmade, 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 basins, wet ponds,
open channels, storm sewers, pipes and infiltration facilities.
A plan for managing stormwater runoff on a watershed-wide
basis, as required by the Stormwater Management Act.
The plan prepared by a qualified professional indicating
how stormwater runoff will be managed at the project site according
to this Chapter.
A watercourse. A channel or conveyance of surface water having
defined bed and banks, whether natural or artificial, with perennial
or intermittent flow.
The smallest drainage unit of a watershed for which stormwater
management criteria has been established.
As defined in Chapter 13, Subdivision and Land Development.
Perennial and intermittent streams, rivers, lakes, reservoirs,
ponds, wetlands, springs, natural seeps, and estuaries, excluding
water in facilities approved for wastewater treatment such as wastewater
treatment impoundments, cooling water ponds and constructed wetlands
used as part of a wastewater treatment process.
A low-lying stretch of land that gathers or carries surface
water runoff. A watercourse without defined bed and bank.
The time for surface water 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.
A general term that includes the characteristics of the ground
surface such as hills, plains, mountains, degree of relief, steepness
of slope and physiographic features. The configuration of a surface
area showing relative elevations.
Acceptable friable loam that is free of subsoil, clay lumps,
brush, roots, weeds, other objectionable vegetation, stones, other
foreign material larger than two inches in any dimension, litter,
and/or other material unsuitable or harmful to plant growth.
The United States Department of Agriculture or any agency
successor thereto.
Such cover shall consist of trees, shrubs, flowers, grass,
or similar natural cover.
A channel or conveyance of surface water, having defined
bed and banks, whether natural or artificial, with perennial or intermittent
flow.
The addition of pollutants to waters of the Commonwealth
in concentrations or quantities sufficient to result in measurable
degradation of water quality.
The total volume of water runoff that is required to be collected
and treated for water quality control by direction to BMP facilities.
The upper surface of groundwater, or that level below which
the soil is seasonally saturated with water.
Rivers, streams, creeks, rivulets, impoundments, ditches,
watercourses, storm sewers, lakes, dammed water, wetlands, ponds,
springs and other bodies or channels of conveyance of surface and
underground water, or parts thereof, whether natural or artificial,
within or on the boundaries of the Commonwealth of Pennsylvania.
Region or area drained by a river, watercourse, or other
surface water, whether natural or artificial. Also synonymous with
“sub-watershed” and “drainage area” referring
to local drainage area of interest for site specific calculations.
Those 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, and similar areas.
