HomeMy WebLinkAbout1983-08-08 OrdinanceORDINANCE NO. 83-3133
AN ORDINANCE AMENDING CHAPTER 8.10, THE
ZONING ORDINANCE OF THE MUNICIPAL CODE OF
THE CITY OF IOWA CITY, IOWA, BY DELETING
SECTION 8.10.50, AIRPORT OVERLAY ZONES, AND
SUBSTITUTING IN LIEU THEREOF A NEW SECTION
8.10.50.
BE IT ORDAINED BY THE CITY OF IOWA CITY,
IOWA:
SECTION 1. PURPOSE. The purpose of this
ordinance is to implement the Iowa City
Municipal Airport Master Plan by
establishing Airport Overlay Zones
consistent with said plan and establishing a
clear overlay zone within which uses which
would be incompatible with the airport are
prohibited.
SECTION 2. AMENDMENTS. Section 8.10.50 is
hereby amended by deleting said section and
inserting the following:
8.10.50 Airport overlay zones.
8.10.50.1 Findings.
(a) The creation or establishment of
an airport hazard is a public nuisance
causing potential injury to those served by
the airport;
(b) It is necessary in the interest of
the public health, safety, and general
welfare that creation of airport hazards be
prevented and that this be accomplished, to
the extent legally possible, by proper
exercise of the police power;
(c) The prevention of the creation or
establishment of airport hazards, and the
elimination, removal, alteration,
mitigation or marking and lighting of
existing airport hazards are public purposes
for which the City may raise and expend
public funds, as an incident to the
operation of the airport, to acquire land or
property interests therein;
(d) Because of the propensity of
sanitary landfills for attracting birds,
which in turn are hazardous to aircraft in
flight, landfills are not considered
compatible with airport operations; and
(e) It is highly desirable that there
be no structures or natural objects or
traverse ways in the clear zones and that no
incompatible uses be allowed in the clear
zone.
8.10.50.2 Definitions.
The following definitions only apply in the
interpretation and enforcement of the
airnort overlay zones.
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(a) Airport. The Iowa City Municipal
Airport.
(b) Airport elevation. The highest
point of the airport s usable landing area
measured in feet above mean sea level, which
elevation is established to be 661 feet.
(c) Airport hazard. Any structure,
tree or use of land which would exceed the
Federal obstruction standards as contained
in FAR Part 77 - Subpart C of Federal
Regulations as revised March 4, 1972, and
which obstruct the airspace required for the
flight of aircraft and landing or takeoff at
the airport or is otherwise hazardous to
such landing or taking off of aircraft.
(d) Airport Layout Plan. A drawing
in the Airport Master Plan depicting
existing and future property lines and
facilities including but not limited to
runways, taxiways, aprons, buildings and
clear zones.
(e) Airport primary surface. A
surface longitudinally centered on a runway
which extends 200 feet beyond the end of a
runway. The width of the primary surface of
a runway shall be that width prescribed in
Part 77 of the Federal Aviation Regulations
(FAR) for the most precise approach existing
or planned for either end of that runway.
The elevation of any point on the primary
j surface is the same as the elevation of the
nearest point on the runway centerline.
(f) Airspace height. For the purpose
of determining the height limits in all
zones set forth herein and shown on the
Airport Height Zoning Map, the datum shall
be mean sea level elevation unless otherwise
specified.
(g) Instrument runway. A runway with
an existing instrument approach procedure or
for which an instrument approach procedure
has been approved or planned.
(h) _Airport Master Plan. A
comprehensive plan for development of the
airport over a 20 year time period. The
Master Plan includes among other things,
aviation activity forecasts, determinations
of needed airport facilities, a financial
plan and proposed time schedule for
developing facilities included in the Master
Plan, and recommendations for use of land on
and adjacent to the airport. The Airport
Layout Plan is a component part of the
Master Plan.
(i) Minimum descent altitude. The
lowest altitude, expressers in feet above
mean sea level, to :h descent: is
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authorized on final approach or during
circle -to -land maneuvering in execution of a
standard instrument approach procedure and
where no electronic glide slope is provided.
0) minimum enroute altitude i—n effect betty e. The
en radioudixes which
assures acceptable navigational signal
coverage and meets obstruction clearance
requirements between those fixes.
(k) Minimum obstruction clearance
altitude. The specified tude i effect
between radio fixes on VOR airways, off -
airway routes, or route segments which meets
obstruction clearance requirements for the
entire route segment and which assures
acceptable navigational signal coverage
within 22 miles of a VOR.
(1) Runway. A defined area on an
airport prepared for landing and takeoff of
aircraft along its length.
(m) Visual runw A runway intended
solely for the operation of aircraft using
visual approach precedures with no straight -
in instrument approach procedure and no
instrument designation indicated on a FAA
approved airport layout plan or by any
Planning document submitted to the FAA by
competent authority.
8.10.50.3 Airport zones and airspace
height limitations.
In order to carry out the provisions of
this Section, there are hereby created and
established certain zones which are depicted
on the Airport Height Zoning Map. A
structure located in more than one (1) zone
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) Horizontal Overlay (OH) Zone.
(1) Defined. The land laying under a
horizontal plane 150 feet above
the established airport
elevation, the perimeter of which
is constructed by:
a• Swinging arcs of 5,000 foot
radii from the center of each
end of the primary surface of
runways 12 and 17 and
connecting the adjacent arcs
by lines tangent to those
arcs, and
b• Swinging arcs of 10,000 foot
radii from the center of each
end of the primary surface of
runways 6, 24, 30 and 35 and
ronnecting , : adjacent arcs
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by lines tangent to those
arcs.
(NOTE: The radius of the arc specified
for each end of a runway will have the
same arithmetical value. That value
will be the highest determined for
either end of the runway. When a 5,000
foot arc is encompassed by tangents
connecting two adjacent 10,000 foot
arcs, the 5,000 foot arc shall be
disregarded on the construction of the
perimeter of the horizontal surface.)
(2) Height limitation. No structure
shall exceed 150 feet above the
established airport elevation in
the OH Zone, as depicted on the
Airport Height Zoning Map.
(3) Use limitation. Sanitary
landfills shall not be permitted
in the OH Zone.
(b) Conical Overlay (OC) Zone. j
(1) Defined. The land lying under a
surface extending outward and
upward from the periphery of the
horizontal surface at a slope of
20 to 1 for a horizontal distance
of 4,000 feet.
(2) Height limitation. No structure
shall penetrate the conical i
surface in the OC Zone, as
depicted on the Airport Height
Zoning Map.
(3) Use limitation. Sanitary
landfills shall not be permitted
in the OC Zone.
(c) Approach Overlay (OA) Zone.
(1) Defined. The land lying under a
surface longitudinally centered
on the extended runway centerline
and extending outward and upward
from each end of the primary
surface. (NOTE: An approach
surface is applied to each end of
each runway based upon the type of
approach available or planned for
that runway end.)
a. The inner edge of the
approach surface is:
1. 500 feet wide for
runways 6, 12, 17, 30
and 35.
2. 1000 feet wide for
runway 24.
b. The outer edge of the
approach surface is:
1. 1,500 feet for runways
12 id 17.
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2. 3,500 feet for runways
6, 30 and 35.
3. 4,000 feet for runway
24.
C. The approach surface zone
extends for a horizontal
distance of:
1. 5,000 feet at a slope of
20 to 1 for runways 12
and 17.
2. 10,000 feet at a slope
of 34 to 1 for runways
6, 24 and 35.
3. 780 feet at a slope of
20 to 1; thence level at
an elevation of 687
feet MSL from 780 feet
to 1326 feet; thence
from 1326 feet to
10,000 feet at a slope
of 34 to 1 for runway
30.
(2)
Height limitation. No structure
shall penetrate the approach
surface in the OA Zone, as
depicted on the Airport Height
Zoning Map.
(3)
Use limitation. Sanitary
landfills shall not be permitted
in the OA Zone.
(d) Clear Overlay (OCL) Zone.
(1)
Defined. The land longitudinally
centered on the runway centerline
or extension thereof lying under
portions of the OA Zone and
described as follows:
a. Runway 6 - 1000 feet wide
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beginning at a point 200 feet
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from the edge of the existing
runway on the extended
runway centerline for a
horizontal distance of 1000
feet; thence widening
uniformly to a width of 1425
feet at a distance of 2700
feet from the point of
beginning.
b. Runways 12 and 17 - 500 feet
wide at the inner edge of the
OA Zone and 700 feet wide a
distance of 1000 feet from
the inner edge.
C. Runway 24 - 1000 feet wide
beginning at a point 490 feet
southwesterly on the runway
centerline from the center
of the d of the existinc
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runway pavement (including
any and all paved safety
areas); thence widening
uniformly to a width of 1510
feet at a point 1700 feet
northeasterly on the
extended runway centerline
from the point of beginning.
d. Runways 30 and 35 - 500 feet
wide at the inner edge of the
OA Zone and 1010 feet wide a
distance of 1700 feet from
the inner edge.
(2)
Use limitations. No use shall be
permitted in which there is
connected therewith a building
designed according to the Uniform
Building Code (1979 Edition) with
an occupancy rating of 50 square
feet of floor area per person or
less. In addition, the following
uses shall not be permitted:
(a) Campgrounds.
(b) Fairgrounds.
(c) Hospitals and institutions.
(d) Motels and hotels.
(e) Nursing and custodial homes.
(f) Residential uses.
(g) Restaurants and similar
eating and drinking
establishments.
(h) Sanitary landfills.
(i) Schools, including
nurseries, pre -kindergartens
and kindergartens.
(j) Stadiums.
(k) Storage of fuel or other
hazardous materials.
(1) Theaters.
(e) Transitional
Overlay (OT) Zone.
(1)
Defined. The land lying under
those surfaces extending outward
and upward at right angles to the
runway centerline and the runway
centerline extended at a slope of
7 to 1 from the sides of the
primary surface and from the sides
of the approach surfaces.
(2)
Height limitation. No structure
shall penetrate the transitional
surface in the OT Zone, as
depicted on the Airport Height
Zoning Map.
(3)
Use limitation. Sanitary
landfills shall not be permitted
in the OT Zone.
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8.10.50.4 Use restrictions.
In addition to the above restrictions
on land, the following special requirements
shall apply.
(a) Any person who proposes any development
of greater height than an imaginary
surface extending outward and upward at
the slope of 100 to 1 for a horizontal
distance of 20,000 feet from the
nearest point of the nearest runway
shall notify the Federal Aviation
Administration (FAA). One executed
form set (four copies) of FAA Form
7460-1, Notice of Proposed
Construction or Alteration shall be
sent to the Cheif, Air Traffic
Division, of the FAA Regional Office in
Kansas City, Missouri, and one copy to
the Iowa City Airport Commission.
(Copies of FAA Form 7460-1 may be
obtained form the FAA.)
(b) No structure shall be erected that
raises the published minimum descent
altitude for an instrument approach to
any runway, nor shall any structure be
erected that causes the minimum
obstruction clearance altitude or
minimum enroute altitude to be
increased.
(c) Lighting.
(1) All lighting or illumination used
in conjunction with street,
parking, signs or use of land and
structures shall be arranged and
operated in such a manner that it
is not misleading or dangerous to
aircraft operating from the
airport or in the vicinity
thereof.
(2) The owner of any structure over
200 feet above ground level shall
install on the structure lighting
in accordance with Federal
Aviation Administration (FAA),
Advisory Circular 70-7460 and
amendments.
(3) Any permit or variance granted may
be so conditioned as to require
the owner of the structure or
growth in question to permit the
City to install, operate and
maintain thereto such markers or
lights as may be necessary to
indicate to pilots the presence of
an airspace hazard.
(d) No operations from any use shall
produce electronic terference with
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navigation signals or radio
communication between the airport and
aircraft.
8.10.50.5. Special exceptions.
(a) The height and use limitations
contained in the Airport Overlay Zones
may be modified by special exception
granted by the Board of Adjustment (the
"Board"). However, no such special
exception shall be granted unless the
Board finds, based upon written reports
from the Federal Aviation
Administration, and the Aeronautics
Division of the Iowa Department of
Transportation, that -
(1) In an application to permit any
structure, tree, or use of land to
exceed the height limitations of
the Airport Overlay Zones, that
such structure, tree, or use of
land, would not obstruct either
the airspace required for the
flight of aircraft, or landing and
take -off of aircraft at the
Airport, and is otherwise not
hazardous to such landing or take-
off of aircraft.
(2) In an application to permit a use
of land otherwise prohibited
herein, that such use would not be
incompatible with airport
operations.
(b) An applicant for a special exception
hereunder shall, as part of the
application submitted to the Board,
file the required written reports of
the Federal Aviation Adminstration,
and the Aeronautics Division of the
Iowa Department of Transportation. No
application for a special exception
hereunder shall be set for hearing by
the Board until such reports have been
filed.
SECTION 3. REPEALER. All ordinances and
parts of ord nances in conflict with the
provision of this ordinance are hereby
repealed.
SECTION 4. SEVERABILITY. If any section,
provision or part of the Ordinance shall be
adjudged to be invalid or unconstitutional,
such ajudication shall not affect the
validity of the Ordinance as a whole or any
section, provision or part thereof not
adjudged invalid or unconstitutional.
SECTION 5. EFFECTIVE DATE. This Ordinance
shall be in effect after its final passage,
approval and pub Y tion as required by law.
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Passed and approved this 8th day of August,
1983.
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MAYOR
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CITY CLERK SAA
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Received 8 Approved
BY The Legal Depaff
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Ordinance No. 83-3133
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It was moved by McDonald and seconded by Erdahl
that the Ordinance as read be adopted and upon roll call there were:
AYES: NAYS: ABSENT:
X BALMER
x DICKSON
X ERDAHL
x LYNCH
X MCDONALD
X NEUHAUSER
X FERRET
First consideration 8/5/83 (4:30 p.m.)
Vote for passage:
AYES: Dickson, Erdahl, Lynch, McDonald.
NAYS: None. ABSTAINING: Balmer. ABSENT: Neuhauser,
Second consideration 8/6/83 Perret.
Vote for passage:
AYES: Dickson, Erdahl, Lynch, McDonald.
NAYS: None. ABSTAINING: Balmer. ABSENT: Neuhauser,
Perret.
Date published 8/11/83
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