For the purposes of this article, 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, 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" imply the phrase "intended,
designed, maintained, or arranged to be used or occupied."
As used in this article the following terms
shall have the meanings indicated.
ACCELERATED EROSION
The removal of the surface of the land through the combined
action of man's activity and the natural processes at a rate greater
than would occur because of the natural process alone.
AGRICULTURAL ACTIVITIES
The work of producing crops and raising livestock including
tillage, plowing, discing, harrowing, pasturing 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; land disturbance.
APPLICANT
A landowner or developer who has filed an application for approval to engage in any regulated activities as defined in §
124-70 of this article.
CHANNEL EROSION
The widening, deepening, and upslope cutting of small channels
and waterways, due to erosion caused by moderate to large floods.
CISTERN
An underground reservoir or tank for storing rainwater.
CULVERT
A structure with appurtenant works which carries a stream
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.
DESIGNEE
The agent of the Monroe County Planning Commission and/or
agent of the municipality involved with the administration, review
or enforcement of any provisions of this article.
DESIGN STORM
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.
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 the goals of Act 167.
DEVELOPER
A person, partnership, association, corporation, or other entity, or any responsible person therein or agent thereof, that undertakes any regulated activity as identified in §
124-70 of this article.
DEVELOPMENT SITE
The specific lot, tract or parcel of land for which a regulated activity, as identified in §
124-70 of this article is proposed.
DOWNSLOPE PROPERTY LINE
That portion of the property line of the development site
located such that all or a portion of overland or pipe flow from the
site would be directed towards it.
DRAINAGE CONVEYANCE FACILITY
A stormwater management facility either existing or designed
to transmit stormwater runoff including streams, channels, swales,
pipes, conduits, culverts, storm sewers, etc.
DRAINAGE EASEMENT
A right granted by a landowner to a grantee allowing the
use of private land for stormwater management purposes.
DRAINAGE PERMIT
A permit issued by the municipal governing body after the
drainage plan has been approved.
DRAINAGE PLAN
The combined stormwater management site plan and narrative,
the erosion and sediment pollution control plan and narrative, and
the nonpoint source pollution control plan and narrative.
EARTH DISTURBANCE
Any activity involving grading, tilling, digging, or filling
of ground or stripping of vegetation or any other activity that causes
an alteration to the existing surface.
EMERGENCY SPILLWAY
An outlet of a pond or basin designed to pass peak discharge
greater than the maximum design storm(s) controlled by the pond.
EROSION
The movement of soil particles by the action of water, wind,
ice, or other natural forces.
EXISTING CONDITIONS
The initial condition of a project site prior to the proposed
construction. 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, such as forested lands.
FLOOD
A general but temporary condition of partial or complete
inundation of normally dry land areas from the overflow of streams,
rivers, and other waters of this Commonwealth.
FLOODPLAIN
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
Maps as being a special flood-hazard area. Also included are areas
that comprise Group 13 Soils, as listed in Appendix A of the Pennsylvania
Department of Environmental Protection (PADEP) Technical Manual for
Sewage Enforcement Officers (as amended or replaced from time to time
by PADEP).
FLOODWAY
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.
FOREST MANAGEMENT/TIMBER OPERATIONS
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.
FREEBOARD
The vertical distance between the elevation of the design
highwater 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
A slope, usually of a road, channel or natural ground specified
in percent and shown on plans as specified herein.
GRASSED WATERWAY
A natural or constructed waterway, usually broad and shallow,
covered with erosion-resistant grasses, used to conduct surface water
from cropland.
IMPOUNDMENT
A retention or detention basin designed to retain stormwater
runoff and release it at a controlled rate.
INFILTRATION STRUCTURES
A structure designed to direct runoff into the ground (e.g.,
french drain, seepage pit, seepage trench).
INLET
A.
A surface connection to an enclosed drain;
B.
A structure at the beginning of a conduit; or
C.
The upstream end of any structure through which
water may flow.
LAND DEVELOPMENT
A.
The improvement of one lot or two or more contiguous
lots, tracts, or parcels of land for any purpose involving:
(1)
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
(2)
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.
C.
Development in accordance with § 503(1.1)
as well as other applicable provisions of the PA Municipalities Planning
Code.
MAIN STEM (MAIN CHANNEL)
Any stream segment or other runoff conveyance facility used
as a reach in the Tobyhanna Creek hydrologic model.
MANNING EQUATION (MANNING FORMULA)
A method for calculation of flow velocity (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 if the flow is not under pressure.
MUNICIPALITY
The Township of Tobyhanna, Monroe County, Pennsylvania.
NONPOINT SOURCE POLLUTION
Pollution that enters surface or groundwater from diffuse
origins in the watershed and does not result from discernible, confined,
or discrete conveyances.
NRCS
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 man-made drainageways, swales, streams, ditches, canals, and pipes
flowing partly full.
OUTFALL
A point at which water is discharged.
PARENT TRACTS
Tracts of land shown as whole parcels as of the date of the
Tobyhanna Creek Watershed Plan county adoption.
PARKING LOT STORAGE
The use of impervious parking areas as temporary stormwater
impoundments with controlled release rates during rainstorms.
PEAK DISCHARGE
The maximum rate of stormwater runoff from a specific storm
event.
PENN STATE RUNOFF MODEL (CALIBRATED)
The computer-based hydrologic modeling technique adapted
to the Tobyhanna Creek Watershed for the Act 167 Plan. The model has
been calibrated to reflect actual recorded flow values by adjoining
key model input parameters.
PIPE
A culvert, closed conduit, or similar structure (including
appurtenances) that conveys stormwater.
PLAN
See "stormwater management plan."
REGULATED ACTIVITIES
Actions or proposed actions that have an impact on stormwater runoff and that are specified in §
124-70 of this article.
RETENTION BASIN
An impoundment in which stormwater is stored and not released
during the storm event. Stored water may be released at a controlled
rate from the basin at some time after the end of the storm.
RETURN PERIOD
The average interval, in years, within which a storm event
of a given magnitude can be expected to recur. For example, the twenty-five-year
return period rainfall would be expected to recur on the average once
every 25 years (see "storm frequency").
RISER
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.
ROOFTOP DETENTION
Temporary ponding and gradual release of stormwater falling
directly onto flat roof surfaces by incorporating controlled-flow
roof drains into building designs.
RUNOFF
Any part of precipitation that flows over the land surface.
SEDIMENTATION
The process by which mineral or organic matter is accumulated
or deposited by the movement of water.
SEDIMENT BASIN
A barrier, dam, 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 occurring from the failure to
design, construct, implement or maintain control measures and control
facilities in accordance with the requirements of this article.
SEEPAGE PIT/SEEPAGE TRENCH
An area of excavated earth filled with loose stone or similar
coarse material into which surface water is directed for infiltration
into the ground.
SHEET FLOW
Runoff which flows over the ground surface as a thin, even
layer, not concentrated in a channel.
SOIL-COVER COMPLEX METHOD
A method of runoff computation developed by the Natural Resources
Conservation Service (NRCS) that is based on relating soil type and
land use/cover to a runoff parameter called "curve number" (CN).
SOIL GROUP, HYDROLOGIC
A classification of soils by the Natural Resources Conservation
Service (NRCS) 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.
SPILLWAY
An outlet of a pond as basin used to pass the design storms
controlled by the pond.
STORAGE INDICATION METHOD
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.
STORM FREQUENCY
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."
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
The total amount of precipitation reaching the ground surface.
STORMWATER MANAGEMENT FACILITY
Any structure, natural or man-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 capacity improvements.
STORMWATER MANAGEMENT PLAN
The plan for managing stormwater runoff in the Tobyhanna
Creek Watershed adopted by Monroe or Carbon or Wayne Counties as required
by the Act of October 4, 1978, P.L. 864, (Act 167), and known as the
"Tobyhanna Creek Watershed Action 167 Stormwater Management Plan."
STORMWATER MANAGEMENT SITE PLAN
The plan prepared by the developer or his representative
indicating how stormwater runoff will be managed as required by this
article.
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
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 as well as other applicable provisions of the Municipalities
Planning Code 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
dwellings, shall be exempt.
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.
WATERCOURSE
A stream of water; river; brook; creek; or a channel or ditch
for water, whether natural or manmade, with perennial or intermittent
flow.
WATERS OF THE COMMONWEALTH
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.
WETLAND
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, ferns, and similar areas.