This article shall be known and may be cited as the "City of
Lock Haven Airport Overlay."
In order to carry out the provisions of this chapter, there
are hereby created and established certain zones within the Airport
Overlay Zone which include all of the land lying beneath the approach
surfaces, transitional surfaces, horizontal surfaces and conical surfaces
as they apply to the William T. Piper Airport. Such zones are shown
on the William T. Piper Airport Height Limitation and Zoning District
Map prepared by the Pennsylvania Department of Transportation, Bureau
of Aviation, and dated 1989, and the City of Lock Haven, Clinton County,
Pennsylvania Airport Overlay Map, which are
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. Larger-Than-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 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 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 five-thousand-foot 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. The
Conical Surface Zone commences at the periphery of the horizontal
surface and extends outward therefrom a horizontal distance of 4,000
feet.
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 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 evaluation
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 555 feet above mean
sea level. In addition to the foregoing, when an airport has a precision
instrument runway approach zone, there are established height limits
sloping seven feet outward for each foot upward beginning at the sides
of and at the same elevation as the approach surface and extending
to where they intersect the conical surface. Where the precision instrument
runway approach zone projects beyond the conical zone, there are established
height limits sloping seven feet outward for each foot upward beginning
at the sides of and at the same elevation as the approach surface
and extending a horizontal distance of 5,000 feet measured at ninety-degree
angles to the extended runway center line.
C. Horizontal Surface Zone. Established at 150 feet above the established
airport elevation or at a height of 705 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 905 feet above mean sea level.
E. Excepted height limitations. 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 50 feet above the surface of
the land.
In any case in which it is desired to remove, lower or otherwise
terminate a nonconforming structure or use, or the approach protection
necessary cannot, because of constitutional limitations, be provided
by airport zoning regulations or it appears advisable that the necessary
approach protection be provided by acquisition of property rights,
rather than by airport zoning regulations, the City may acquire by
purchase, grant or condemnation, in the manner provided by the law
under which municipalities are authorized to acquire real property
for public purposes, such air right, aviation easement or other estate
or interest in the property or nonconforming structure or use in question
as may be necessary to effectuate the purpose of this chapter. In
the case of the purchase of any property or any easement or estate,
or interest therein, or the acquisition thereof by the power of eminent
domain, the municipality making the purchase of exercising the power
shall, in addition to the damages for the taking, injury or destruction
of property, also pay the cost of the removal and relocation of any
structure or any public utility which is required to be moved to a
new location.
In the event of conflict between any airport zoning regulations
adopted under this chapter and any other regulations applicable to
the same area, whether the conflict be with respect to the height
of structures or trees and the use of land or any other matter, and
whether the other regulations were adopted by the municipality which
adopted the airport zoning regulations or be some other municipality
or otherwise, the more stringent limitation or requirement shall govern
and prevail.
Any person aggrieved or any taxpayer affected by any decision
of the Zoning Hearing Board may appeal to the Court of Common Pleas
as provided by law. In cases where applicable law does not provide
an appeal from a municipality to a Board, a person or taxpayer may
appeal from a decision of a municipality or joint airport zoning board,
as provided by law for similar zoning proceedings.
The following figures and formulas have been prepared for determining
the maximum allowable heights of objects within the airport's vicinity.
The formulas are used in conjunction with the figure; whereas a formula
is assigned a number, that formula corresponds with a point location
of the same number on the figure. By using the formula and following
the steps outlined below, the maximum allowable height at a point
location can be determined.
A. Locate the point (object) in question on the figure (sample point
locations identified by numbers are given in various coded airport
zones).
B. Apply the formula having the same number as the chosen point location
to calculate the maximum allowable height for an object at that point
[some formulas will have letter variables (A, B, C, etc.) which are
shown on the figure].
Visual and Utility Nonprecision Runway Zones
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Allowable Height Formulas
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Location Zone
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Formula
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1.
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Horizontal Surface
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Allowable height = established airport elevation (555 feet)
+ (150 feet) - (ground elevation)
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2.
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Conical Surface
|
Allowable height = (555 feet) + (150 feet) + (A ÷ 20)
- (ground elevation)
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3.
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Primary Surface
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Allowable height = (555 feet) - (ground elevation)
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4.
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Transitional Surface
|
Allowable height = (elevation of the primary surface along the
runway center line perpendicular to the location point) + (B + 7)
- (ground elevation)
|
5.
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Transitional Surface
|
Allowable height = (elevation of the approach surface along
the runway center line perpendicular to the location point) + (E ÷
7) - (ground elevation)
|
6.
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Approach Surface
|
Allowable height = (runway end elevation) + (c - 200 ÷
20) - (ground elevation)
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