[Ord. 2011-8, 11/3/2011, § 201]
The removal of the surface of the land through the combined
action of man's activity and the natural process of a rate greater
than would occur because of the natural process alone.
Act of October 4, 1978, P.L. 864, (Act 167), 32 P.S. § 680.1
et seq., as amended, and known as the "Storm Water Management Act."
Activities associated with agriculture such as, but not limited
to, agricultural cultivation, agricultural operations 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."
Pennsylvania Stormwater Best Management Practices Manual,
as amended and updated.
The York County Conservation District, which district is
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.
A stormwater management facility designed to transmit stormwater
runoff and shall include streams, channels, swales, pipes, conduits,
culverts, storm sewers, storm water detention/retention facilities,
etc.
York County Pennsylvania.
A structure with appurtenant works, which carries a stream,
or stormwater runoff under or through an embankment or fill.
An impoundment structure regulated by the Pennsylvania DEP
regulations, 25 Pa. Code. Chapter 105.
The Pennsylvania Department of Environmental Protection.
Also known as "DEP."
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."
An agent of the Township appointed by the Board of Supervisors
for the purpose of administration, review or enforcement of any provisions
of this chapter.
A structure designed to retard stormwater discharges by temporarily
storing and releasing the runoff at a controlled 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."
Any discharge of runoff not confined to a single point, location
or channel (e.g., sheet flow or shallow concentrated flow).
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 23-A,
"Disconnected Impervious Area."
An unstabilized land area where an earth disturbance activity
is occurring or has occurred.
The DEP Erosion and Sediment Pollution Control Manual, as
amended and updated.
A 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 site specific plan consisting of drawings, calculations
and a narrative that identifies BMPs for the purpose of minimizing
the potential for accelerated erosion and sedimentation before, during
and after earth disturbance activity.
The dominant land cover during the five-year period immediately
preceding a proposed regulated activity.
Federal Emergency Management Agency.
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 during a one-percent annual chance (or larger) flood.
The channel of a stream, river or watercourse and the adjacent
land areas that must be reserved in order to discharge the one-percent
annual chance flood without cumulatively increasing the floodplain
water surface elevation. 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 50 feet landward
from the top of the bank of the stream on both sides.
Planning and activities necessary for the management of forest
land. 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.
The difference between the design flow elevation in the emergency
spillway of a basin and the top of the basin embankment; and the difference
between the design flow elevation of a swale and the top of a swale
embankment.
The Hopewell Township Board of Supervisors.
A structure which meets the following:
[Added by Ord. No. 6-2023, 8/10/2023]
Is used for the production, processing, keeping, storing, sale
or shelter of an agricultural commodity as defined in Section 2 of
the Act of December 19, 1974, (P.L. 973, No. 319), known as the "Pennsylvania
Farmland and Forest Land Assessment Act of 1974,"[1] or for the storage of agricultural equipment or supplies.
Refers to soils grouped according to their runoff-producing
characteristics. The chief consideration is the inherent capacity
of bare soil to permit infiltration of surface waters. 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).3, 4
A surface that prevents the absorption and infiltration of
surface water into the ground. Impervious surfaces include, but are
not limited to, any roof, parking lot, driveway, streets, patios and
sidewalks, whether such surfaces and areas are constructed with concrete,
asphalt, shale or crushed stone. Porous concrete and porous pavers
will not be considered impervious surface under this chapter.
The entrance of surface water into the ground, usually at
the soil-air interface.
A structure or other man-made feature designed to collect
and retain runoff allowing it to infiltrate into the ground.
The volume of runoff collected and retained in an infiltration
facility and infiltrated into the ground.
The York County Integrated Water Resources Plan, which plan
includes 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 landscapes are formed on carbonate rocks,
such as limestone or dolomite.
Includes any of the following activities:
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 build initially
or cumulatively, or a single nonresidential building on the number
of occupants or tenure.
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.
A subdivision of land.
Development in accordance with § 503(1.1) of the Pennsylvania
Municipalities Planning Code, 53 P.S. § 10503(1.1).
A qualified professional individual or firm appointed by
the Board of Supervisors of the Township for the purpose of administration,
review and enforcement of the provisions of this chapter.
Hopewell Township, York County, Pennsylvania.
National Pollution Discharge Elimination System.
USDA Natural Resources Conservation Service (previously SCS).
Operation and maintenance.
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 and canals.
Post-construction stormwater management plan.
The maximum rate of stormwater runoff occurring at a specified
location during a specified storm event.
See "infiltration."
An individual, partnership, public or private association
or corporation, limited liability company, firm, trust, estate, municipality,
governmental unit, public utility or any other legal entity whatsoever
which is recognized by law as the subject of rights and duties. Whenever
used in any section prescribing or imposing a penalty, the term "person"
shall include the members of a partnership, the officers, members,
managers, servants and agents of an association or limited liability
company, officers, agents and servants of a corporation, and the officers
of a municipality or county, but shall exclude any department, board,
bureau or agency of the Commonwealth of Pennsylvania.
Any area not defined as impervious or semi-pervious.
A culvert, closed conduit or similar structure (including
appurtenances) that conveys stormwater.
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.
A rainfall-runoff relation used to estimate peak flow.
Activities that may affect stormwater runoff and that are defined in § 23-105, "Applicability."
Activity involving earth disturbance subject to regulation
under 25 Pa. Code, Chapter 92, 25 Pa. Code, Chapter 102, or the Clean
Streams Law, 35 P.S. § 691.1 et seq.
The rate at which runoff is released from a site or subarea
measured in cubic feet per second.
A reservoir, formed from soil or other material, which is
designed to permanently retain a certain amount of stormwater which
also may be designed to temporarily detain surface runoff for a period
of time sufficient to reduce the velocity and rate of surface flows
leaving a site.
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 he expected to occur. For example, the twenty-five-year
return period rainfall would be expected to occur on average once
every 25 years; i.e., the annual probability of a twenty-five-year
storm is 0.04 (four-percent annual chance).
A best management practice that is an area of permanent vegetation
along surface waters. (Such areas serve as natural vegetative filters
between upland landscapes and waterways).
A vertical pipe or inlet structure extending from the bottom
of a pond that is used to control the discharge rate from the pond
for specified design storm.
Any part of atmospheric precipitation, or snow or ice melt,
that is not absorbed or infiltrated into the ground and flows over
the land.
Soils or other materials transported by surface water as
a product of erosion.
Any non-vegetated surface that impedes the absorption and
infiltration of surface water into the ground. Semi-pervious surfaces
do not include engineered, non-vegetated surfaces including, but not
limited to, porous concrete and porous pavers, which are considered
pervious.
Water flow with a relatively thin and uniform depth.
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 which is
used to pass peak discharge greater than the maximum design storm
controlled by the principal outlet of the facility.
The regulatory requirements to protect, maintain, reclaim
and restore water quality under Title 25, Pa. Code, and the Clean
Streams Law, 35 P.S. § 691.1 et seq.
The number of times that a given storm event occurs on average
in a stated period of years.
A pipe or a system of pipes and appurtenances, which intercepts
and conveys stormwater runoff, but excludes sewage, industrial wastes
and similar discharges.
Water generated from any form of atmospheric precipitation.
Is abbreviated as "BMPs" or "SWM BMPs" throughout this chapter.
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 facilities and all SWM BMPs. Stormwater
management facilities are abbreviated "SWM facilities" throughout
this chapter.
Parts and/or elements of the York County Integrated Water
Resources Plan which incorporate the requirements of the Act of October
4, 1978, P.L. 864, (Act 167), 32 P.S. § 680.1 et seq., 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. Stormwater management site plan
will be designated as "SWM site plan" throughout this chapter. For
all NPDES permitted sites, the stormwater management site plan shall
include, and be consistent with, the erosion and sediment control
plan as submitted to the York County Conservation District and/or
DEP.
The smallest drainage unit of a watershed for which stormwater
management criteria have been established in the Stormwater Management
Plan.
As defined in the Pennsylvania Municipalities Planning Code,
Act of July 31, 1968, P.L. 805, No. 247, 53 P.S. § 10101
et seq.
Stormwater management.
United States Department of Agriculture.
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, fens and similar areas.
York County Conservation District.
[1]
Editor's Note: See 72 P.S. § 5490.2.
