[Ord. 2011-09, 9/7/2011, § 201]
Act of October 4, 1978, P.L. 864, (Act 167), as amended,
and known as the "Stormwater 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.
Pennsylvania Stormwater Best Management Practices Manual,
as amended and updated.
The Federal Water Pollution Control Act, 33 U.S.C. § 1251
et seq., and any subsequent amendments thereto.
A conservation district, as defined in § 3(c) of
the Conservation District Law [3 P.S. § 851(c)] that 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.
Activities subject to NPDES construction permits. Such activities
include, but are not limited to, clearing and grubbing, grading, excavating
and demolition.
York County, Pennsylvania.
A structure which carries surface water through an obstruction.
An impoundment structure regulated by the Pennsylvania DEP
25 Pa.Code, Chapter 105 regulations.
The Pennsylvania Department of Environmental Protection.
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 structure designed to retard stormwater runoff by temporarily
storing and releasing runoff at a predetermined rate.
The volume of runoff that is captured and released into the
waters of this Commonwealth at a controlled rate.
Any person, partnership, association, corporation or other
entity, or any responsible person therein or agent thereof, that undertakes
any regulated activity.
See "project site."
An impervious or impermeable surface that is disconnected
from any stormwater drainage or conveyance system and is redirected
or directed to a pervious area, which allows for infiltration, filtration,
and increased time of concentration as specified in Appendix 25-B,
"Disconnected Impervious Area."
An unstabilized land area where an earth disturbance activity
is occurring or has occurred.
That portion of a property line of a lot or parcel of land
being developed located such that overland or pipe flow from the development
site would be directed toward it.
A stormwater management facility designed to transmit stormwater
runoff, including but not limited to, streams, channels, swales, pipes,
conduits, culverts and storm sewers.
A limited right of use granted in private land, allowing
the use of private land for stormwater management purposes, where
in no structure may be constructed.
Erosion and Sedimentation Control Manual, as amended or updated.
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.
The natural process by which the surface of the land is worn
away by water, wind, or chemical action.
A plan designed to minimize accelerated erosion and sedimentation
associated with earth disturbance activity.
The dominant land cover during the five-year period immediately
preceding a proposed regulated activity.
Federal Emergency Management Agency.
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 one-hundred-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 one-hundred-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.
Replenishment of existing natural underground water supplies.
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).
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, streets, driveways, access drives, parking
areas and sidewalks. Any areas designed to be covered by loose surfacing
materials such as gravel, stone and/or crushed stone, and intended
for storage of and/or travel by motorized or non-motorized vehicles,
or travel by pedestrians shall be considered impervious. Surfaces
or areas designed, constructed and maintained to permit infiltration
as specified herein may be considered pervious. For the purposes of
this Chapter, a surface or area shall not be considered impervious
if such surface or area does not diminish the capacity for infiltration
of stormwater for storms up to, and including, a two-year twenty-four-hour
storm event.
Water flowing downward though the ground surface.
A structure designed to direct runoff into the ground (e.g.,
french drains, seepage pits, seepage trench).
The York County Integrated Water Resources Plan, which plan
includes the Act 167 Plan elements and requirements.
A type of topography or landscape characterized by surface
depressions, sinkholes, rock pinnacles/uneven bedrock surface, underground
drainage, and caves. Karst is formed on carbonate rocks, such as limestone
or dolomite.
Inclusive of any or all of the following meanings:
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 buildings or (2) the division or allocation of land or space
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.
Any subdivision of land.
Development in accordance with § 503(1.1) of the Pennsylvania
Municipalities Planning Code.
Municipal Separate Storm Sewer System.
Shrewsbury Township, York County, Pennsylvania.
National Pollution Discharge Elimination System.
USDA Natural Resources Conservation Service (previously SCS).
Operation and Maintenance.
Operation and Maintenance Plan.
Post-Construction Stormwater Management Plan.
The maximum rate of stormwater runoff from a specific storm
event.
Movement of water through the ground.
An individual, partnership, public or private association
or corporation, firm, trust, estate, municipality, governmental unit,
public utility or any other legal entity whatsoever. Whenever used
in any section prescribing or imposing a penalty, the term "person"
shall include the members of a partnership, the officers, agents and
servants of a corporation and the officers of a municipality.
Any area not defined as impervious.
The specific area of land where any regulated activities
in the Township are planned, conducted, or maintained.
Any person licensed by the State of Pennsylvania or otherwise
qualified by 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. This term shall also include activites that directly
alter or affect the characteristics of runoff (stormwater, groundwater,
potable water, etc.) over and/or discharging from a site.
Activity involving earth disturbance subject to regulation
under 25 Pa.Code, Chapter 92, 25 Pa.Code, Chapter 102, or the Clean
Streams Law.
An impoundment in which stormwater is stored and not released
during a storm event. Stored water may be released from the basin
at some time after the end of the 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 natural vegetative filter located between an upland landscape
and a waterway.
A vertical pipe extending from the bottom of a pond or other
water impoundment that is used to control the discharge rate from
the pound or impoundment for a specified design storm.
Temporary ponding and gradual release of stormwater falling
directly onto roof surface by incorporating control-flow roof drains
into building design.
Any part of precipitation that flows over the land.
The surface components on any watershed which either individually
or in any combination thereof, directly affect the rate, amount and
direction of stormwater runoff. These may include, but are not limited
to, vegetation, soils, slopes and any type of man-made landscape alterations.
Soils or other materials transported by surface water as
a product of erosion.
A barrier, dam, retention or detention basin designed to
retain sediment.
An area of excavate earth filled with loose stone or similar
materials into which surface water is directed for infiltration into
the ground.
A surface which permits a limited amount of vertical transmission
of water.
Water flow across the land surface with a relatively thin
and uniform depth.
A method of runoff computation in NRCS publication "Urban
Hydrology for Small Watersheds," Technical Release No. 55.
A depression in the embankment of a pond or basin which is
used to pass peak discharge greater than the maximum design storm
controlled by the pond or basin.
The regulatory requirements to protect, maintain, reclaim,
and restore water quality under Title 25 of the Pennsylvania Code
and the Clean Streams Law.
Publicly or privately owned faculties by which stormwater
is collected and/or conveyed including, but not limited to, any roads
with drainage systems, municipal streets, gutters, curbs, inlets,
piped storm drains, pumping facilities, retention and detention basins,
natural and human- made or altered drainage channels, reservoirs,
and other drainage structures.
The number of times that a given storm event occurs on average
in a stated period of years.
A pipe or conduit, or a system of pipes or conduits, which
intercepts and carries surface stormwater runoff, but excludes sewage,
industrial wastes and similar discharges.
Drainage runoff from the surface of the land resulting from
precipitation or snow or ice melt.
Is abbreviated as BMPs or SWM BMPs throughout this Chapter.
For all NPDES permitted sites, the stormwater management site plan
shall include, and be consistent with, the erosion and sedimentation
and pollution control plan as submitted to the York County Conservation
District (YCCD) and/or DEP.
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.
A permit issued by the Township after a stormwater management
site plan has been approved.
The York County Integrated Water Resource Plan, which plan
incorporates the requirements of the Act of October 4, 1978, P.L.
864, (Act 167), as amended, and known as the "Storm Water Management
Act."
The plan prepared by the developer or his representative
indicating how stormwater runoff will be managed at the development
site in accordance with this Chapter. This term shall include any
plans, reports, studies and other supplemental information. Stormwater
management site plan will be designated as SWM site plan throughout
this Chapter.
The division or re-division of a lot, tract or parcel of
land by any means into two or more lots, tracts or parcels or other
divisions or land including changes in existing lot lines for the
purpose, whether immediate or future, or lease, partition by the court
for distribution to heirs or devises, transfer or 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 and/or carries
surface water runoff.
Stormwater Management, Shrewsbury Township, York County,
Pennsylvania.
United States Department of Agriculture.
A stream of water; river, brook, creek, or a channel or ditch
for water, whether natural or man-made.
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.
Region or area drained by a river, watercourse, or other
surface water of this Commonwealth.
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.
York County Conservation District.
