[Ord. 5/26/1987, § 1400]
This Part is adopted pursuant to the authority conferred by
the Airport Zoning Act of 1984, P.L. 164, 74 Pa.C.S. § 5911
et seq., as amended and the Municipalities Planning Code of 1968,
P.L. 805, 53 P.S. § 10101 et seq., as amended. It is hereby
found that an obstruction has the potential for endangering the lives
and property of users of the Pennridge Airport, located in East Rockhill
Township, and property or occupants of land in its vicinity; that
an obstruction may reduce the size of areas valuable for the landing,
takeoff and maneuvering of aircraft; thus, tending to destroy or impair
the utility of Pennridge Airport and the public investment therein.
Accordingly, it is declared:
a. The creation or establishment of an obstruction has the potential
of being a public nuisance and may injure the region served by Pennridge
Airport.
b. It is necessary in the interest of the public health, public safety
and general welfare of persons using Pennridge Airport that the creation
or establishment of obstructions that are a hazard to air navigation
be prevented.
It is further declared that the prevention of the creation or
establishment of hazards to air navigation, elimination, removal,
alteration or mitigation of hazards to air navigation, or making and
lighting of obstructions are public purposes for which a political
subdivision may raise and expend public funds and acquire land or
interests in land.
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[Ord. 5/26/1987, § 1401; as amended by Ord. 240,
6/17/2008]
AIRPORT ELEVATION
The highest point of the airport's useable landing area,
measured in feet from sea level, which is 567 feet above mean sea
level.
AIRPORT HAZARD
Any structure or object, natural or manmade, or use of land
which obstructs the airspace required for flight of aircraft in landing
or taking off at an airport or is otherwise hazardous to the landing
or taking off of aircraft.
AIRPORT HAZARD AREA
An area of land or water upon which an airport hazard might
be established if not prevented as provided in this chapter.
APPROACH SURFACE
A surface longitudinally centered on the extended runway centerline extending outward and upward from the end of the primary surface and at the same slope as the approach height limitation slope set forth in §
27-1603. In plan, the perimeter of the approach surface coincides with the perimeter of the approach zone.
CONICAL SURFACE
A surface extending outward and upward from the periphery
of the horizontal surface at a slope of 20 to one for a horizontal
distance of 4,000 feet.
HAZARD TO AIR NAVIGATION
An obstruction determined to have a substantial adverse effect
on the safe and efficient utilization of the navigable airspace.
HEIGHT
For the purpose of determining the height limits in all zones
set forth in this Part and shown on the airport zone 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 zone.
LARGER THAN UTILITY RUNWAY
A runway that is constructed or and intended to be used by
propeller driven aircraft of greater than 12,500 pounds maximum gross
weight and jet powered aircraft.
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 §
27-1603.
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 §
27-1602. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline.
RUNWAY
A defined area on an airport prepared for landing and takeoff
of aircraft along its length.
STRUCTURE
For the purpose of this Part, 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 in addition to those objects defined in §
27-252.
TRANSITIONAL SURFACES
These surfaces extend outward at 90° angles to the runway
centerline and the runway centerline 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 surface 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° to the extended
runway centerline.
TREE
Any object of natural growth.
[Ord. 5/26/1987, § 1402]
In order to carry out the provisions of this chapter, 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 Pennridge Airport. Such zones are shown on the Pennridge Airport Zoning Map which is
attached to this chapter and made a part hereof. 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. Runway Larger than Utility Visual Approach Zone. The inner edge of
this approach zone coincides with the width of the primary surface
and is 500 feet wide. The approach zone expands outward uniformly
to a width of 1,500 feet at a horizontal distance of 5,000 feet from
the primary surface. Its centerline is the continuation of the centerline
of the runway.
b. Transitional Zones. The transitional zones are the areas beneath
the transitional surfaces.
c. Horizontal Zone. The horizontal zone is established by swinging arcs
of 5,000 feet radii for all runways designated utility or visual and
10,000 feet for all others 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 zone does not include
the approach and transitional zones.
d. Conical Zone. The conical zone is established as the area that commences
at the periphery of the horizontal zone and extends outward therefrom
a horizontal distance of 4,000 feet.
[Ord. 5/26/1987, § 1403; as amended by Ord. 240,
6/17/2008]
Except as otherwise provided in this chapter, no structure shall
be erected, altered, or maintained and no tree shall be allowed to
grow in any zone created by this chapter to a height in excess of
the applicable height herein established for such zone. Such applicable
height limitations are hereby established for each of the zones in
question as follows:
a. Runway Larger than Utility Visual Approach Zone. Slopes 34 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 Zones. Slope 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 567 feet above mean sea
level. In addition to the foregoing, there are established height
limits sloping seven feet outward for each foot upward beginning at
the sides of and the same elevation as the approach surface and extending
to where they intersect the conical surface.
c. Horizontal Zone. Established at 150 feet above the airport elevation,
or at a height of 717 feet above mean sea level.
d. Conical Zone. Slopes 20 feet outward for each foot upward beginning
at the periphery of the horizontal zone and at 150 feet above the
airport elevation and extending to a height of 350 feet above the
airport elevation.
e. Excepted Height Limitations. Except for the limitations set forth
in this section, nothing in this chapter shall be construed as prohibiting
the construction or maintenance of any structure or growth of any
tree to a height up to 35 feet above the surface of the land.
[Ord. 5/26/1987, § 1404]
Notwithstanding any other provisions of this chapter, no use
may be made of land or water within any zone established by this chapter
in such a manner as to create electrical interference with navigational
signals or radio communication between the airport and aircraft, make
it difficult for pilots to distinguish between airport lights and
others, result in glare in the eyes of the pilots using the airport,
impair visibility in the vicinity of the airport, create bird strike
hazards, or otherwise in any way endanger or interfere with the landing,
takeoff or maneuvering of aircraft intending to use the airport.