For the purposes of this chapter, certain terms and words used herein shall be interpreted as follows:
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.
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.
The word "person" includes an individual, firm, association, organization, partnership, trust, company, corporation, or any other similar entity.
The words "shall" and "must" are mandatory; the words "may" and "should" are permissive.
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:
- ACCELERATED EROSION
- The removal of the surface of the land through the combined action of man's activities and natural processes at a rate greater than would occur because of the natural processes alone.
- The person or persons submitting a stormwater management plan to the Township for consideration.
- BMP (BEST MANAGEMENT PRACTICE)
- Stormwater structures, facilities, and techniques designed or used to maintain or improve the quality of water and surface runoff while acting to neutralize increased runoff volume caused by development activity. BMPs may be structural (basins, infiltration structures), nonstructural (vegetated filter strips, buffers) or managerial techniques (maintenance practices) that may be used singly or in combination intending to improve water quality.
- BOARD OF SUPERVISORS
- The Board of Supervisors of East Manchester Township.
- An underground reservoir or tank for storing rainwater.
- CONSERVATION DISTRICT
- The York County Conservation District or any successor agency thereto.
- A structure with appurtenant works which carries surface water through an obstruction.
- The Pennsylvania Department of Environmental Protection or any successor agency thereto.
- DESIGN STORM
- The magnitude of precipitation from a storm event measured in probability of occurrence (e.g., fifty-year storm) and duration (e.g., twenty-four-hour), and used in computing stormwater management control systems.
- DETENTION BASIN
- A basin designed to retard stormwater runoff by temporarily storing the runoff and releasing it at a predetermined rate. A detention basin can be designed to drain completely after a storm event, or it can be designed to contain a permanent pool of water.
- A person, or any combination of persons, or agent thereof, that undertakes, owns, maintains or has responsibility for any proposed or existing regulated activity. "Developer" as used herein shall include also the owner who shall have joint and several responsibility for adherence to the provisions of this chapter.
- Any man-made change to improved or unimproved real estate, including but not limited to building or other structures, the subdivision of land, the placement of mobile or prefabricated structures, streets and other paving, utilities, filling, grading, excavation, mining, dredging or the like.
- DOWNSLOPE PROPERTY LINE
- That portion of the property line of the lot, tract, or parcels of land being developed located such that a portion or all stormwater runoff from the development site would be directed towards it.
- DRAINAGE CONVEYANCE FACILITY
- A stormwater management facility designed to transmit stormwater runoff and shall include streams, channels, swales, pipes, conduits, culverts, storm sewers, etc.
- DRAINAGE EASEMENT
- A right of limited use granted by the owner of real property, as grantor, to a person, as grantee, allowing the use of grantor's property by the grantee for the purpose of stormwater management.
- The removal of soil particles by the action of water, wind, ice, snow or other natural forces.
- EROSION AND SEDIMENTATION CONTROL PLAN
- A plan that is designed to minimize accelerated erosion and sedimentation associated with construction activity.
- 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.
- 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 Map as being a special flood hazard area. Also included are areas that comprise Group 13 soils, as listed in Appendix A of the 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 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 50 feet from the top of the bank of the stream.
- GROUNDWATER RECHARGE
- Replenishment of existing natural underground water supplies.
- Any surface or material other than vegetative cover which prevents the percolation of water into the ground. Impervious surfaces and materials shall include, but not be limited to, any roof, parking or driveway, new streets and sidewalks.
- INFILTRATION STRUCTURES
- A designed improvement which directs runoff into the ground, (e.g., French drains, seepage pits, seepage trench).
- JOINT PERMIT APPLICATION
- The joint application for Pennsylvania water obstruction and encroachment permit and U.S. Army Corps of Engineers Section 404 permit, or any successor permit or permits thereto.
- LAND DISTURBANCE
- Any activity involving alteration, construction, mining, timber, harvesting, grubbing, grading, filling, digging or filling of ground, or stripping of vegetation, or any other activity which causes land to be exposed to the danger of erosion.
- The Natural Resource Conservation Service of the United Stated Department of Agriculture or any successor agency thereto.
- The East Manchester Stormwater Management Ordinance, as amended or reenacted.
- The fee simple or equitable titleholder to a lot or tract of land. "Owner" for the purposes of this chapter shall be determined at the relevant time at which the provisions of this chapter are applied or enforced.
- PEAK DISCHARGE
- The maximum rate of flow of water at a given point and time resulting from a specified storm event.
- The Pennsylvania Department of Transportation or any successor agency thereto.
- An individual, partnership, public or private association, limited liability company, corporation, firm, trust, estate, municipality, governmental unit, public utility or any other legal entity. "Person" when used herein shall also include the successors, heirs and assigns of such person, the members of a partnership, the officers, agents and servants of a corporation or limited liability company and the officers of a municipality or other governmental unit.
- The use and all improvements proposed in a land use permit application, building permit application and/or subdivision and land development plan or in any other plan for development.
- PROJECT SITE
- The specific tract of land for which a project or development is proposed.
- RETENTION BASIN
- An impoundment in which stormwater is stored and not released during the storm event. Stored water may be released at a predetermined 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.
- 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.
- That part of precipitation which flows over the land.
- Soil Conservation Service of the United States Department of Agriculture or any successor agency thereto.
- Solid material, both mineral and organic, that is in suspension, is being transported, or has been moved from its site of origin by water.
- SEDIMENT BASIN
- A barrier, dam, retention or detention basin designed to retain sediment.
- SEEPAGE PIT/SEEPAGE TRENCH
- An area of excavated earth filled with loose stone or similar materials and into which surface water is directed for infiltration into the ground.
- A surface or material such as stone, rock concrete or other materials which permits some vertical transmission of water.
- SHEET FLOW
- Runoff that 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 SCS, and found in its publication "Urban Hydrology for Small watersheds," Technical Release No. 55, SCS, January 1975.
- SOIL GROUP, HYDROLOGIC
- A classification of soils by the NRCS which divides soils 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 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.
- STORM FREQUENCY
- The number of times that a given storm event occurs or is exceeded on average in a stated period of years. See also the definition of "return period."
- STORM SEWER
- A system of pipes, conduits, swales or other similar structures which carry intercepted runoff and other drainage, but excludes domestic sewage and industrial wastes.
- Water which surfaces, slows or collects during and subsequent to a rain, ice or snowfall event.
- 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, and infiltration structures.
- STORMWATER MANAGEMENT PLAN
- The documentation of the stormwater management system, if any, to be used for a given development site, the contents of which are established in § 199-9.
- 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.
- 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, transfer of ownership or building or lot development; provided, however, that the division of land for agricultural purposes into parcels of more than 10 acres, not involving any new street or easement of access, shall be excluded from the definition.
- SUBDIVISION ORDINANCE
- The East Manchester Township Subdivision and Land Development Ordinance, as amended or reenacted.
- A shallow ditch intended to gather or carry 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.
- East Manchester Township, a Second Class Township located in York County, Pennsylvania.
- TOWNSHIP CODE
- The Code of East Manchester Township, as amended or reenacted.
- TOWNSHIP ENGINEER
- The Engineer of the Township appointed pursuant to authority granted by the Second Class Township Code.
- Any natural or artificial stream, river, creek, ditch, channel, canal, conduit, culvert, drain, waterway, gully, ravine or wash in which water flows in a definite direction or course, either continuously or intermittently, and has a definite channel, bed and banking and includes any area adjacent thereto subject to the inundation by reason of overflow of floodwater.
- All the land from which water drains into a particular watercourse.
- 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.
- Those areas that are inundated or saturated by surface water 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.