For the purposes of this chapter, certain terms
and words used herein shall be interpreted as follows:
A.
Words used in the present tense include the future
tense; the singular number includes the plural, and the plural number
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, unit of government,
or any other similar entity.
D.
The words "shall" and "must" are mandatory; the words
"may" and "should" are permissive.
E.
The words "used or occupied" include the words "intended,
designed, maintained, or arranged to be used, occupied or maintained."
As used in this chapter, the following terms
shall have the meanings indicated:
The removal of the surface of the land through the combined
action of man's activity and the natural processes of a rate greater
than would occur because of the natural process alone.
The work of producing crops and raising livestock including
tillage, plowing, disking, harrowing, pasturing and installation of
conservation measures. For purposes of regulation by this chapter,
construction of new buildings or impervious area is not considered
an agricultural activity.
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; land disturbance.
A person who has filed an application for approval to engage in any regulated activities as defined in § 92-4 of this chapter.
Those maintained by the contractor as he constructs the project
and upon which he documents the actual locations of the building components
and changes to the original contract documents. These, or a copy of
same, are turned over to the engineer at the completion of the project.
The channel at the top-of-bank or point where water begins
to overflow onto a floodplain.
The portion of stream flow that is sustained by groundwater
discharge.
A stormwater retention area which utilizes woody and herbaceous
plants and soils to remove pollutants before infiltration occurs.
Stormwater structures, facilities and techniques to control,
maintain or improve the quantity and quality of surface runoff and
groundwater recharge.
The area of land immediately adjacent to any wetland, lake,
pond, vernal pond, or stream, measured perpendicular to and horizontally
from the delineated edge of the wetland, lake, pond, or vernal pond,
or the top-of-bank on both sides of a stream.
The widening, deepening, and headward cutting of small channels
and waterways caused by stormwater runoff or bankfull flows.
An underground reservoir or tank for storing rainwater.
The Monroe County Conservation District.
That part of water removed from the immediate water environment
not available for other purposes such as water supply, maintenance
of stream flows, water quality, fisheries and recreation, as opposed
to water that is used non-consumptively, which is returned to surface
water, where practicable, and groundwater.
A structure with appurtenant works which carries water 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 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.
The Pennsylvania Department of Environmental Protection.
The agent of the Monroe County Planning Commission, Monroe
County Conservation District and/or agent of the governing body involved
with the administration, review or enforcement of any provisions of
this chapter by contract or memorandum of understanding.
A Pennsylvania registered professional engineer, registered
landscape architect or a registered professional land surveyor trained
to develop stormwater management plans.
The magnitude and temporal distribution of precipitation
from a storm event measured in probability of occurrence (e.g., a
five-year storm) and duration (e.g., 24 hours), used in the design
and evaluation of stormwater management systems.
An impoundment structure designed to manage stormwater runoff
by temporarily storing the runoff and releasing it at a predetermined
rate.
Those subareas in which some type of detention is required
to meet the plan requirements and the goals of Act 167.
The specific tract of land for which a regulated activity
is proposed.
Drainage discharge not confined to a single point location
or channel, such as sheet flow or shallow concentrated flow.
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 pipe flow from
the site would be directed towards it.
A stormwater management facility designed to transmit stormwater
runoff and shall include channels, swales, pipes, conduits, culverts,
storm sewers, etc.
A right granted by a grantor to a grantee, allowing the use
of private land for stormwater management purposes.
A permit issued by the Municipal governing body after the
drainage plan has been approved.
The documentation of the stormwater management system, if any, to be used for a given development site, the contents of which are established in § 92-19.
A construction or other human activity which disturbs the
surface of land, including, but not limited to, clearing and grubbing,
grading, excavations, embankments, agricultural plowing or tilling,
timber harvesting activities, road maintenance activities, mineral
extraction, and the moving, depositing, stockpiling, or storing of
soil, rock or earth materials.
A conveyance area that is used to pass peak discharge greater
than the maximum design storm controlled by the stormwater facility.
A structure or activity that changes, expands or diminishes
the course, current or cross-section of a watercourse, floodway or
body of water.
The movement of soil particles by the action of water, wind,
ice, or other natural forces.
A site-specific plan that is designed to minimize accelerated
erosion and sedimentation during construction.
Surface waters of high quality which satisfy Pennsylvania
Code Title 25, Environmental Protection, Chapter 93, Water Quality
Standards, Section 93.4b(b) (relating to anti-degradation).
The initial condition of a project site prior to the proposed
alteration. If the initial condition of the site is undeveloped land,
the land use shall be considered as "meadow" unless the natural land
cover is proven to generate lower curve numbers or Rational "C" value.
A temporary condition of partial or complete inundation of
land areas from the overflow of streams, rivers, and other waters
of this Commonwealth.
Any land area susceptible to inundation by water from any
natural source or delineated by applicable Department of Housing and
Urban Development, Federal Insurance Administration Flood Hazard Boundary
mapped as being a special flood hazard area.
The channel of the watercourse and those portions of the
adjoining floodplains, which are reasonably required to carry and
discharge the one-hundred-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 one-hundred-year frequency floodway,
it is assumed, absent evidence to the contrary, that the floodway
extends from the stream to 50 feet from the top of the bank of the
stream.
Planning and activities necessary for the management of forest
land with no change of land use proposed. These include timber inventory
and preparation of forest management plans, silvicultural treatment,
cutting budgets, logging road design and construction, timber harvesting
and reforestation.
A vertical distance between the elevation of the design high-water
and the top of a dam, levee, tank, basin, swale, or diversion berm.
The space is required as a safety margin in a pond or basin.
A slope, usually of a road, channel or natural ground specified
in percent and shown on plans as specified herein. (To) grade: to
finish the surface of a roadbed, top of embankment or bottom of excavation.
A natural or constructed waterway, usually broad and shallow,
covered with erosion-resistant grasses, used to convey surface water.
Replenishment of existing natural underground water supplies
without degrading groundwater quality.
The U.S. Army Corps of Engineers, Hydrologic Engineering
Center (HEC) - Hydrologic Modeling System (HMS) computer program.
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 Pennsylvania Code Title 25, Environmental
Protection, Chapter 93, Water Quality Standards, Section 93.4b(a).
The hydrologic cycle or balance that sustains quality and
quantity of stormwater, baseflow, storage, and groundwater supplies
under natural conditions.
A classification of soils by the Natural Resources Conservation
Service, formerly the Soil Conservation Service, into four runoff
potential groups. The groups range from A soils, which are very permeable
and produce little runoff, to D soils, which are not very permeable
and produce much more runoff.
A surface that prevents the percolation of water into the
ground such as rooftops, pavement, sidewalks, driveways, gravel drives,
roads and parking, and compacted fill, earth or turf to be used as
such.
A retention or detention basin designed to retain stormwater
runoff and release it at a controlled rate.
Development that occurs on smaller parcels that remain undeveloped
but are within or very close proximity to urban areas. The development
relies on existing infrastructure and does not require an extension
of water, sewer or other public utilities.
For stormwater to pass through the soil from the surface.
A structure designed to direct runoff into the underground
water (e.g., French drains, seepage pits, seepage trench).
The upstream end of any structure through which water may
flow.
The improvement of one lot or two or more contiguous
lots, tracts, or parcels of land for any purpose involving a group
of two or more residential or nonresidential buildings, whether proposed
initially or cumulatively, or a single nonresidential building on
a lot or lots, regardless of the number of occupants or tenure; or
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;
A subdivision of land;
Development in accordance with Section 503(1.1)
of the PA Municipalities Planning Code.
A soil horizon or condition in the soil profile or underlying
strata which includes one of the following:
A seasonal high water table, whether perched
or regional, determined by direct observation of the water table or
indicated by soil mottling.
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.
A rock formation, other stratum or soil condition
which is so slowly permeable that it effectively limits downward passage
of water.
A part of a subdivision or a parcel of land used as a building
site or intended to be used for building purposes, whether immediate
or future, which would not be further subdivided. Whenever a lot is
used for a multiple-family dwelling or for commercial, institutional
or industrial purposes, the lot shall be deemed to have been subdivided
into an equivalent number of single-family residential lots as determined
by estimated sewage flows.
Any stream segment or other runoff conveyance facility used
as a reach in the Brodhead/McMichaels hydrologic model.
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.
Chestnuthill Township, Monroe County, Pennsylvania.
See "hydrologic regime."
Pollution that enters a water body from diffuse origins in
the watershed and does not result from discernible, confined, or discrete
conveyances.
Methods of controlling stormwater runoff quantity and quality,
such as innovative site planning, impervious area and grading reduction,
protection of natural depression areas, temporary ponding on site
and other techniques.
Natural Resource Conservation Service (previously SCS).
A drainage element in which stormwater flows within an open
surface. Open channels include, but shall not be limited to, natural
and man-made drainage ways, swales, streams, ditches, canals, and
pipes flowing partly full.
Point where water flows from a conduit, stream, or drain.
Points of water disposal from a stream, river, lake, tidewater
or artificial drain.
The parcel of land from which a land development or subdivision
originates existing as of the date of municipal adoption of the original
Brodhead or McMichaels Creek ordinance.
Involves the use of parking areas as temporary impoundments
with controlled release rates during rainstorms.
The maximum rate of stormwater runoff from a specific storm
event.
The computer-based hydrologic modeling technique adapted
to the Brodhead/McMichaels watershed for the Act 167 Plan. The model
has been "calibrated" to reflect actual recorded flow values by adjoining
key model input parameters.
A culvert, closed conduit, or similar structure (including
appurtenances) that conveys stormwater.
The Planning Commission of Chestnuthill Township.
The flood that may be expected from the most severe combination
of critical meteorological and hydrologic conditions that are reasonably
possible in any area. The PMF is derived from the probable maximum
precipitation (PMP) as determined based on data obtained from the
National Oceanographic and Atmospheric Administration (NOAA).
An alternative that is available and capable of being done
after taking into consideration cost, existing technology and logistics
in light of overall project purposes.
Undeveloped/natural condition.
Techniques employed in structural and nonstructural stormwater BMPs to provide storage or filtering to help trap coarse materials and other pollutants before they enter the system, but not necessarily meet the water quality volume requirements of § 92-10.
A rainfall-runoff relation used to estimate peak flow.
Surface area or depression where stormwater collects, and
a portion of which infiltrates and replenishes the underground and
groundwater.
Original documents revised to suit the as-built conditions
and subsequently provided by the engineer to the client. The engineer
takes the contractor's as-builts, reviews them in detail with his/her
own records for completeness, then either turns these over to the
client or transfers the information to a set of reproducibles, in
both cases for the client's permanent records.
Any construction, alteration, or improvement exceeding 5,000
square feet of impervious surface on sites where existing land use
is commercial, industrial, institutional, or multifamily residential.
Actions or proposed actions that have an impact on stormwater runoff quality and quantity and that are specified in § 92-4 of this chapter.
The percentage of existing conditions peak rate of runoff
from a site or subarea to which the postdevelopment peak rate of runoff
must be reduced to protect downstream areas.
A structure in which stormwater is stored and not released
during the storm event. Retention basins do not have an outlet other
than recharge and must infiltrate stored water in no more than four
days.
The average interval, in years, within which a storm event
of a given magnitude can be expected to recur.
A vertical pipe 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.
Subdivision and Land Development Ordinance.[1]
A barrier, dam, retention or detention basin located and
designed to retain rock, sand, gravel, silt, or other material transported
by water during construction.
The process by which mineral or organic matter is accumulated
or deposited by the movement of water or air.
The placement, discharge or any other introduction of sediment
into the waters of the Commonwealth.
An area of excavated earth filled with loose stone or similar
coarse material, into which surface water is directed for infiltration
into the underground water.
Runoff that flows over the ground surface as a thin, even
layer.
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).
The zone through which contaminants, if present, are likely
to migrate and reach a public drinking water well or public surface
water intake.
Watersheds for which the receiving waters are exceptional
value (EV) or high-quality (HQ) waters.
A conveyance that is used to pass the peak discharge of the
maximum design storm controlled by the stormwater facility.
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. See "return
period."
A system of pipes and/or open channels that convey intercepted
runoff and stormwater from other sources, but excludes domestic sewage
and industrial wastes.
The surface runoff generated by precipitation reaching the
ground surface.
Any structure, natural or man-made, that, due to its condition,
design, or construction, conveys, stores, or otherwise affects stormwater
runoff quality and quantity. Typical stormwater management facilities
include, but are not limited to, detention and retention basins, open
channels, storm sewers, pipes, and infiltration structures.
The plan for managing those land use activities that will
influence stormwater runoff quality and quantity and that would impact
the Brodhead/McMichaels Watershed adopted by Monroe County and Pike
County as required by the Act of October 4, 1978, P.L. 864, (Act 167),
and known as the "Brodhead/McMichaels Watershed Act 167 stormwater
management plan."
The plan prepared by the applicant or his representative
indicating how stormwater runoff will be managed at the particular
site of interest according to this chapter.
A natural watercourse.
A bridge, culvert or other structure in excess of 100 feet
in length upstream to downstream which encloses a regulated water
of this Commonwealth.
The smallest drainage unit of a watershed for which stormwater
management criteria have been established in the stormwater management
plan.
The division or redivision of a lot, tract, or parcel of
land by any means into two or more lots, tracts, parcels or other
divisions of land, including changes in existing lot lines for the
purpose, whether immediate or future, of lease, partition by the court
for distribution to heirs or devisees, transfer of ownership, or building
or lot development; provided, however, that the subdivision by lease
of land for agricultural purposes into parcels of more than 10 acres,
not involving any new street or easement of access or any residential
dwelling, shall be exempted.
A low-lying stretch of land which gathers or carries surface
water runoff.
See "forest management."
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.
Upland areas that are wet only for periods of two or three
months in the spring or summer and are typically identified during
dry months by the thin film of soil sediment that usually exists on
the upper side of the leaf litter covering the forest floor. These
very shallow depressions constitute critical habitat for a range of
woodland amphibians and related species and provide important storage
for stormwater and snowmelt that would otherwise contribute to downstream
flooding.
A channel or conveyance of surface water having defined bed
and banks, whether natural or artificial, with perennial or intermittent
flow.
A specific land area that drains water into a river system
or other body of water.
Any and all rivers, streams, creeks, rivulets, 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.
The point at which a groundwater well bore hole meets the
surface of the ground.
The surface and subsurface area surrounding a water supply
well, well field, spring or infiltration gallery supplying a public
water system, through which contaminants are reasonably likely to
move toward and reach the water source.
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, fens, and similar areas.
