[Ord. No. 678, 11/28/2018]
As used in this chapter, the following terms shall have the
meanings indicated unless the context clearly indicates a different
meaning:
Same as "Storm Water Management Act."
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.
A landowner, developer, or other person who has filed an
application to the Township for approval to engage in any regulated
activity at a project site in the Township.
Activities, facilities, designs, measures, 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:
"structural" or "nonstructural." In this chapter, nonstructural 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. 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 and are considered stormwater management facilities
for purposes of this chapter.
The DEP's Stormwater Best Management Practices Manual, December
2006, as amended.
The Board of Supervisors of the Township.
The Pennsylvania Clean Streams Law, 35 P.S. § 691.1
et seq., as amended.
That individual duly appointed and/or designated by the Township
Manager, or the Board of Supervisors, who shall be responsible for
administering and enforcing this chapter.
The Allegheny County Conservation District (ACCD) or successor
agency. The Conservation District has the authority under a delegation
agreement executed with DEP to administer and enforce all or a portion
of the regulations promulgated under 25 Pa. Code Chapter 102.
Allegheny County, Pennsylvania.
The Allegheny County Department of Real Estate, or any agency
successor thereto.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
The Department of Environmental Protection of the Commonwealth
of Pennsylvania, or any agency successor thereto.
The Department of Transportation of the Commonwealth of Pennsylvania,
or any agency successor thereto.
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. Also see "return
period."
A qualified professional as defined herein, or organization
such as the Conservation District, that has been designated by the
Township Manager, or the Board of Supervisors, to be the reviewer
of SWM site plans for the Township, and shall be understood to be
the reviewer where indicated as the Township within this chapter.
An impoundment designed to collect and retard stormwater
runoff by temporarily storing the runoff and releasing it at a predetermined
rate. Detention basins are designed to drain completely in a designed
period after a rainfall event, and to become dry until the next rainfall
event.
The volume of runoff that is captured and released into the
waters of the commonwealth at a controlled rate.
As defined in the Subdivision and Land Development Ordinance (Chapter 22). Any reference to "developer" in this chapter shall include the landowner.
See "land development."
See "project site."
An unstabilized land area where an earth disturbance activity
is occurring or has occurred.
Interception and removal of excess surface water or groundwater
from land by artificial or natural means.
The DEP's Erosion and Sediment Pollution Control Program
Manual (March 2012, as amended).
A construction or other human activity which disturbs the
surface of the land, including, but not limited to: clearing and grubbing;
grading; excavations; embankments; road maintenance; building construction;
and the moving, depositing, stockpiling, or storing of soil, rock,
or earth materials.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
The natural process by which the surface of the land is worn
away by water, wind, or chemical action.
Any act by which soil or rock is cut into, dug, quarried,
uncovered, removed, displaced or relocated, and shall include the
conditions resulting therefrom.
The dominant land cover during the five-year period immediately
preceding a proposed regulated activity.
The Federal Emergency Management Agency of the United States
Department of Homeland Security or any agency successor thereto.
To increase the height of the ground surface.
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; 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 DEP).
The channel of the watercourse and those portions of the
adjoining floodplains that are reasonably required to carry and discharge
the 100-year 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 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 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.
A vertical distance between the elevation of the design high-water
level and the top of a dam, levee, tank, basin, or diversion ridge.
The space is required as a safety margin to prevent over-topping due
to wind or other causes.
Systems and practices that use or mimic natural processes
to infiltrate, evapotranspire, or reuse stormwater on the site where
it is generated.
Water beneath the earth's surface that supplies wells and
springs and is within the saturated zone of soil and rock.
The replenishment of existing natural underground water supplies
from precipitation or overland flow.
The branch of science concerned with the mechanics of fluids,
especially liquids; as applied in stormwater management, the study
of the characteristics of water flowing in conveyance channels, and
from control facilities.
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 Conservation District offices. Soils become less pervious as the
HSG varies from A to D (NRCS[2]).
The science dealing with waters of the earth and their distribution
and circulation through the atmosphere.
Same as "impervious surface."
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 and similar structures; and any new streets or sidewalks. Decks,
parking areas, and driveway areas are counted as impervious areas
if they directly prevent infiltration. Any surface areas designed
to initially be gravel or crushed stone shall be assumed to be impervious
surfaces. In addition, any surface designed to be constructed of permeable,
pervious or porous concrete, asphalt, or pavers shall be considered
an impervious surface.
An excavation or depression in the ground surface (e.g.,
basin or rain garden) designed to retain stormwater runoff and release
it at a controlled rate.
Movement of surface water into the soil, where it is absorbed
by plant roots, evaporated into the atmosphere, or percolated downward
to recharge groundwater.
DCNR defines invasive plants as those species that are not
native to the state, grow aggressively, and spread and displace native
vegetation. See the following internet address for a list of invasive
species: http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr
010314.pdf.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
Any activity involving the changing, grading or transportation
of fill from or onto land or any other activity which causes an increase
in the exposure of land to the danger of erosion.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
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.
The upkeep necessary for the efficient operation of physical
properties.
The Pennsylvania Municipalities Planning Code, 53 P.S. § 10101
et seq., as amended.
The federal government's system for issuance of permits under
the Clean Water Act,[3] which is delegated to DEP in Pennsylvania.
Plant species that have historically grown in Pennsylvania
and are not invasive species as defined herein.
The Natural Resources Conservation Service of the United
States Department of Agriculture, or its successor agency. The NRCS
was formerly known as the "Soil Conservation Service (SCS)."
Operation and maintenance.
Same as "operation and maintenance agreement."
Same as "operation and maintenance plan."
An agreement with the Township executed by the developer
and/or landowner which contains provisions to guarantee and secure
the proper operation and maintenance of all stormwater management
facilities and BMPs shown on a Township-approved SWM site plan.
The portion of the SWM site plan which describes the future
operation and maintenance responsibilities for the stormwater management
facilities shown on the SWM site plan.
The maximum rate of stormwater runoff from a specific storm
event.
Maximum flow.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
The rate at which water will move through a saturated soil.
Any area not defined as impervious.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
The specific area of land where any regulated activities
in the Township are planned, conducted, or maintained.
Any person licensed by the Pennsylvania Department of State
or otherwise qualified under Pennsylvania law to perform the work
required by this chapter.
Any earth disturbance activities or any activities that involve
the alteration or development of land in a manner that may affect
stormwater runoff.
The percentage of existing conditions' peak rate of runoff
from a site or subarea to which the proposed conditions' peak rate
of runoff must be reduced to protect downstream areas.
A watershed or portion of a watershed for which a release
rate has been established by an adopted Act 167 Stormwater Management
Plan.
Same as "release rate district."
Same as "release rate maps."
The official maps delineating the release rate districts
in the Township which are attached hereto and incorporated herein
at Appendix 23-A.
Same as "retention facility."
A stormwater management facility which provides for storage
of stormwater runoff and controlled release of this runoff during
and after a storm.
The volume of runoff that is captured and not released directly
into the surface waters of this commonwealth during or after a storm
event.
The average interval, in years, within which a storm event
of a given magnitude can be expected to occur one time. For example,
the twenty-five-year return period rainfall would be expected to occur
on average once every 25 years; or stated in another way, the probability
of a twenty-five-year storm occurring in any one year is 0.04 (i.e.,
a 4% chance).
A permanent vegetated area of trees and shrubs located adjacent
to streams, lakes, ponds and wetlands.
Same as "street."
Any part of precipitation that flows over the land.
Soils or other materials transported by surface water as
a product of erosion.
The process by which mineral or organic matter is accumulated
or deposited by moving wind, water, ice or gravity.
The degree of deviation of a surface from the horizontal,
usually expressed in percent or degrees.
See § 23-302 and Appendix 23-B of this chapter.
The upper layer of earth which may be dug or plowed; the
loose surface material of the earth in which vegetation normally grows.
See "Township Standard Details."
The regulatory requirements to protect, maintain, reclaim,
and restore water quality under Title 25 of the Pennsylvania Code
and the Clean Streams Law.
A conduit that carries intercepted surface runoff, street
water and other wash waters or drainage, but excludes domestic sewage
and industrial wastes.
The Pennsylvania Stormwater Management Act, 32 P.S. § 680.1
et seq., as amended.
This chapter, as amended, which is identified as Chapter 23 of the Moon Township Code of Ordinances, Stormwater Management, as amended.
Drainage runoff from the surface of the land resulting from
precipitation or snow or ice melt.
A finite area of the Township, as designated by its boundaries
on the maps attached hereto and incorporated herein at Appendix 23-A.
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; and infiltration facilities.
The plan prepared by the developer or the developer's representative
indicating how stormwater runoff will be managed at the development
site in accordance with this chapter. "Stormwater management site
plan" will be designated as "SWM site plan" throughout this chapter.
A channel or conveyance of surface water having a defined
bed and banks, whether natural or artificial, with perennial or intermittent
flow.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
Any man-made object having an ascertainable stationary location
on or in land or water, whether or not it is affixed to the land.
As defined in the Subdivision and Land Development Ordinance (Chapter 22).
Chapter 22 of the Moon Township Code of Ordinances, Subdivision and Land Development, as amended.
A low-lying stretch of land which gathers or carries surface
water runoff.
Stormwater management.
Same as "stormwater management site plan."
Same as "forest management."
The Township of Moon located in Allegheny County, Pennsylvania.
Same as "Comprehensive Plan," as defined in the Subdivision and Land Development Ordinance (Chapter 22).
The Engineer of the Township duly appointed by the Board
of Supervisors pursuant to the requirements of Article XII of the
Second Class Township Code, 53 P.S. §§ 66201 through
66203, as amended, and/or his authorized designee.
The Manager of the Township of Moon, or his designee, or
the designee of the Township Board of Supervisors.
The Township's accepted methods, materials, designs, details,
and practices for construction, repair, and replacement of certain
private improvements and public improvements prepared by the Township
Engineer and approved by the Board of Supervisors by resolution, as
may be amended from time to time. Copies of the current Township Standard
Details are on file in the office of the Township Manager.
United States Department of Agriculture, or its successor
agency.
The grant of a deviation or modification to the requirements
of one or more provisions of this chapter which complies with the
standards of this chapter.
See "stream."
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.
A region or land area drained by a river, watercourse, or
other surface water of this commonwealth to a downstream point.
The official map(s) delineating the stormwater management
districts of the Township, which are attached hereto and incorporated
herein at Appendix 23-A.
As defined by the Subdivision and Land Development Ordinance (Chapter 22).
Chapter 27 of the Moon Township Code of Ordinances, Zoning, as amended.
