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Home My WebLink About1983-06-13 Ordinance1-. ORDINANCE NO. 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 (OCL) 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 considered airport hazards; and (e) It is highly desirable that there be no structures or natural objects or traverse ways within the clear zones. 8.10.50.2 Definitions. The following definitions only apply in the interpretation and enforcement of the airport overlay zones. (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. (i { MICROFILMED BY �I 1JORM MICRO! y CEDAR RAPIDS•DES*MOINES r _ 1 --1 .a - Ordinance No. Page 2 (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 Lavout Plan. A drawing(s) depicting existing and future property lines and facilities including but not limited to runways, taxiways, aprons, buildings and clear zones. (e) Airport griTmary 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 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. (9) Instrument A runway with an existing FAA approved straight - in instrument approach procedure, or a runway for which planning for i such procedure is included on a current FAA approved Airport Layout Plan. I (h) Minimum descent altitude. The lowest altitude, expressed in feet above mean sea level, to which descent is 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. (i) Minimum enroute altitude. The altitude in effect between radio flies which assures acceptable navigational signal coverage and meets obstruction clearance requirements between those fixes. (j) Minimum obstruction clearance altitude. The specified altitude in 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. (k) Runway. A defined area on an airport prepared for landing and takeoff of aircraft along its length. (1) Visua _ 1_ ruwav, 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. MICROFILMED BY 'JORM NNCROLAB CEDAR RAPIDS•DES-MOINES r A - I i Ordinance No. Page 3 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, 17 and 30 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 and 35 and i connecting the adjacent arcs by lines tangent to those arcs. I (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. Landfills shall not be permitted in the OH Zone. i (b) Conical Overlay (OC) Zone. (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 surface in the OC Zone, as depicted on the Airport Height Zoning Map. (3) Use limitation. Landfills shall not be permitted in the OC Zone. IM MICROFILMED V `.JORM MICROLAB i CEDAR RAPIDS -DES 14MES r --- ? J 1 n Ordinance No. Page 4 (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 12, 17, 30 and 35. 2. 1000 feet wide for runways 6 and 24. b. The outer edge of the approach surface is: 1. 1,500 feet for runways 12, 17 and 30. 2. 3,500 feet for runways 6 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, 17 and 30. 2. 10,000 feet at a slope of 34 to 1 for runways 6, 24 and 35. (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. Landfills shall not be permitted in the OH Zone. (d) Clear Overlay (OCL) Zone. (1) Defined. The land lying under portions of the OA Zone and described as follows: a. Runway 6 - 1000 feet wide at the inner edge of the OA Zone and 1425 feet wide a distance of 1700 feet from the inner edge. b. Runways 12, 17 and 30 - 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 at the inner edge of the OA Zone and 1510 feet wide a distance of 1700 feet from the inner edge. MICROFILMED BY fJORM MICROLAB ;CEDAR RAPT DS -DES MOINES 1 I Ordinance No. Page 5 d. Runways 6 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 limitation. The following uses shall not be permitted in the OCL Zone: a. Dwellings. b. Hospitals and institutions. C. Motels and hotels. d. Nursing and custodial homes. e. Restaurants and similar eating and drinking establishments. f. Schools. g• Theaters. h. Stadiums. i. Fairgrounds. j. Storage of fuel or other hazardous materials. k. Landfills. (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 Sur ace 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. Landfills shall not be permitted in the OT Zone. 8.10.50.4 Use restrictions. No use shall be made of land or water in such a manner as to interfere with the operation of any airborne aircraft. The following special requirements shall apply to each use: (a) All proponents of structures defined under FAR 77, Subpart 8 shall file notice as required with the FAA. ,-. --� ri^ [I G MICROFILMED BY t± iJORM MICROLAB I T-'LEOAR RAPIDS•OEs MOINES' J.. 1 ■ Ordinance No. Page 6 (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- 7460-1F 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 interference with navigation signals or radio communication between the airport and aircraft. 8.10.50.5 Variances and Special exceptions. The Board of Adjustment may not grant variances from the provisions of the Airport Overlay Zones. The Board may grant a special exception under the provisions of Sec. 8.10.28, to permit (a) any structure or tree to exceed the height limitations herein; or (b) any use of land prohibited herein. No such special exception shall be granted, however, unless the Federal Aviation Administration and the Aeronautics Division of the Iowa Department of Transportation shall have indicated, in request pursuant to subsection (a) hereof, that such structure, tree or use of land would not 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 or, in request pursuant to subsection (b) hereof, that such use would not be incompatible with airport operations. SECTION 3. REPEALER. All ordinances and parts of ordinances 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 publication as required by law. i� MICROFILMED BY fJORM MICROLAB CEDAR RAPIDS DES MOINES i J_ Ordinance No. Page 7 Passed and approved this ATTEST: MAYOR CITY CLERK Received R APprcved far Tb legal p_partment j Ir ti j I i i I i MICROFILMED BY j IJOk4 MICROLAB . jf CEDAR �RAP16s•DES MOlNff' r - ----`--- ----'� J. �i Ordinance No. Page 7 Passed and approved this ATTEST: MAYOR CITY CLERK Received R APprcved far Tb legal p_partment j Ir ti j I i i I i MICROFILMED BY j IJOk4 MICROLAB . jf CEDAR �RAP16s•DES MOlNff' r - ----`--- ----'� J. P MICROFILMEO BY JORM MICROLAB CEDAR RAPI05.OES MOIRES 'IN