The following words and phrases when used in this article shall
have the meaning given to them in this section unless the context
clearly indicates otherwise:
AIRCRAFT
Any contrivance, except an unpowered hang glider or parachute,
used for manned ascent into or flight through the air.
AIRPORT
Moorhead Memorial Airpark. Any area of land or water which
is used, or intended to be used, for the landing and takeoff of aircraft
and any appurtenant areas which are used, or intended to be used,
for airport buildings or air navigation facilities or rights-of-way,
together with all airport buildings and facilities thereon. As used
herein, the term "airport" includes public airports but excludes private
airports and heliports. Public and private airports are defined separately
in this section.
AIRPORT ELEVATION
Moorhead: 805 feet. The highest point of an airport's usable
landing area measured in feet above sea level.
AIRPORT HAZARD
Any structure or object, natural or man-made, or use of land
which obstructs the airspace required for flight or aircraft in landing
or taking off at an airport or is otherwise hazardous as defined by
"airport hazard" in 74 Pa.C.S.A. § 5102.
AIRPORT HAZARD AREA
Any area of land or water upon which an airport hazard might
be established if not prevented as provided for in this article and
Act 164 of 1984 (Pennsylvania laws relating to aviation).
APPROACH SURFACE
A surface longitudinally centered on the extended runway center line, extending outward and upward from the end of the primary surface and at the same slope as the approach surface zone height limitation slope set forth in §
350-76 of this article. In plan, the perimeter of the approach surface coincides with the perimeter of the approach surface zone.
CONICAL SURFACE
A surface extending outward and upward from the periphery
of the horizontal surface at a slope of 20:1 for a horizontal distance
of 4,000 feet.
DEPARTMENT
Pennsylvania Department of Transportation.
FAA
Federal Aviation Administration of the United States Department
of Transportation.
HEIGHT
For the purpose of determining the height limits in all zones
set forth in this article and shown on the Airport Zoning Map, the
datum shall be mean sea level elevation unless otherwise specified.
HORIZONTAL SURFACE
A horizontal plane 150 feet above the established airport
elevation, the perimeter of which, in plan, coincides with the perimeter
of the horizontal surface zone.
LARGER THAN UTILITY RUNWAY
A runway that is constructed for and intended to be used
by propeller-driven aircraft of greater than 12,500 pounds maximum
gross weight and jet-powered aircraft.
NONCONFORMING USE
Any preexisting structure, object of natural growth, or use
of land which is inconsistent with the provisions of this article
or an amendment thereto.
NONPRECISION INSTRUMENT RUNWAY
A runway having an existing instrument approach procedure
utilizing air navigation facilities with only horizontal guidance,
or area-type navigation equipment, for which a straight-in nonprecision
instrument approach procedure has been approved or planned.
OBSTRUCTION
Any structure, growth, or other object, including a mobile object, which exceeds a limiting height set forth in §
350-76 of this article.
PERSON
An individual, firm, partnership, corporation, company, association,
joint-stock association, or governmental entity; includes a trustee,
a receiver, an assignee, or a similar representative of any of them.
PRECISION INSTRUMENT RUNWAY
A runway having an existing instrument approach procedure
utilizing an instrument landing system (ILS) or a precision approach
radar (PAR). It also means a runway for which a precision approach
system is planned and is so indicated on an approved airport layout
plan or any other planning document.
PRIMARY SURFACE
A surface longitudinally centered on a runway. When the runway has a specially prepared hard surface, the primary surface extends 200 feet beyond each end of that runway. For military runways or when the runway has no specially prepared hard surface, or planned hard surface, the primary surface ends at each end of that runway. The width of the primary surface is set forth in §
350-76 of this article. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway center line.
PRIVATE AIRPORT
An airport which is privately owned and which is not open
or intended to be open to the public as defined in 74 Pa.C.S.A. § 5102.
PUBLIC AIRPORT
An airport which is either publicly or privately owned and
which is open to the public as defined in 74 Pa.C.S.A. § 5102.
RUNWAY
A defined area on an airport prepared for landing and takeoff
of aircraft along its length.
STRUCTURE
An object, including a mobile object, constructed or installed
by man, including, but without limitation, buildings, towers, cranes,
smokestacks, earth formation and overhead transmission lines.
TRANSITIONAL SURFACES
These surfaces extend outward at 90° angles to the runway
center line and the runway center line extended at a slope of seven
feet horizontally for each foot vertically from the sides of the primary
and approach surfaces to where they intersect the horizontal and conical
surfaces. Transitional surfaces for those portions of the precision
approach surfaces, which project through and beyond the limits of
the conical surface, extend a distance of 5,000 feet measured horizontally
from the edge of the approach surface and at 90° angles to the
extended runway center line.
TREE
Any object of natural growth.
UTILITY RUNWAY
A runway that is constructed for and intended to be used
by propeller-driven aircraft of 12,500 pounds maximum gross weight
or less.
VISUAL RUNWAY
A runway intended solely for the operation of aircraft using
visual approach procedures.
In order to carry out the provisions of this article, there
are hereby created and established certain zones which include all
of the land lying beneath the approach surfaces, transitional surfaces,
horizontal surfaces and conical surfaces as they apply to the Moorhead
Memorial Airpark. Such zones are shown on the Moorhead Memorial Airpark
Height Limitation and Zoning District Map prepared by the Pennsylvania
Department of Transportation, Bureau of Aviation, and dated Spring
1989, which is incorporated herein. An area located in more than one
of the following zones is considered to be only in the zone with the
more restrictive height limitation. The various zones are hereby established
and defined as follows:
A. Utility runway visual approach surface zone. Established beneath
the visual approach surface. The inner edge of this zone coincides
with the width of the primary surface and is 250 feet wide. The zone
expands outward uniformly to a width of 1,250 feet at a horizontal
distance of 5,000 feet from the primary surface. Its center line is
the continuation of the center line of the runway.
B. Transitional surface zones. Established beneath the transitional
surfaces adjacent to each runway and approach surface as indicated
on the Height Limitation and Zoning District Map.
C. Horizontal surface zone. Established beneath the horizontal surface,
150 feet above the established airport elevation, the perimeter of
which is constructed by swinging arcs of 5,000 feet radii from the
center of each end of the primary surface of each runway and connecting
the adjacent arcs by drawing lines tangent to those arcs. The horizontal
surface zone does not include the approach surface and transitional
surface zones.
D. Conical surface zone. Established beneath the conical surface. This
zone commences at the periphery of the horizontal surface and extends
outward there from a horizontal distance of 4,000 feet.
Except as otherwise provided in this article, no structure shall
be erected, altered, or maintained, and no tree shall be allowed to
grow, in any zone created by this article to a height in excess of
the applicable height limit herein established for such zone. Such
applicable height limitations are hereby established for each of the
zones in question as follows:
A. Utility runway visual approach surface zone. Slopes 20 feet outward
for each foot upward beginning at the end of and at the same elevation
as the primary surface and extending to a horizontal distance of 5,000
feet along the extended runway center line.
B. Transitional surface zones. Slopes seven feet outward for each foot
upward beginning at the sides of and at the same elevation as the
primary surface and the approach surface, and extending to a height
of 150 feet above the airport elevation, which is 805 feet above mean
sea level.
C. Horizontal surface zone. Established at 150 feet above the established
airport elevation or at a height of 955 feet above mean sea level.
D. Conical surface zone. Slopes 20 feet outward for each foot upward
beginning at the periphery of the horizontal surface and at 150 feet
above the established airport elevation and extending to a height
of 350 feet above the established airport elevation or at a height
of 1,155 feet above mean sea level.
E. Excepted height limitations. Nothing in this article shall be construed
as prohibiting the construction or maintenance of any structure or
growth of any tree to a height up to 75 feet above the surface of
the land.