Chapter 17.16
AIR INSTALLATION COMPATIBLE USE ZONE (AICUZ)

Sections:

17.16.010    Purpose and intent.

17.16.020    Applicability.

17.16.030    Airspace and land use safety areas.

17.16.040    General use restrictions.

17.16.050    Height restrictions.

17.16.060    Administrative height exception.

17.16.070    Approach-departure clearance surface restrictions.

17.16.080    AICUZ accident potential zone I (APZ-I) restrictions.

17.16.090    AICUZ accident potential zone II (APZ-II) restrictions.

17.16.100    Substantial noise impact areas (LdN-65).

17.16.110    Land use requirements.

17.16.010 Purpose and intent.

The purpose and intent of the Air Force air installation compatible use zone (AICUZ) is to reduce the potential for airport hazards, and protect the health and safety of the neighboring communities based on the following findings:

A. An airport hazard endangers the lives and property of users or occupants in the vicinity of Fairchild Air Force Base (FAFB) within Spokane County.

B. An airport obstruction hazard reduces the size of the area available for the landing, takeoff, and maneuvering of aircraft, thus tending to destroy or impair the viability of an airport and the public investment.

C. The creation or establishment of an airport hazard is a safety issue and detrimental to the region served by the airport affected.

D. It is necessary to prevent the creation or establishment of airport hazards in order to protect the public health, safety, and general welfare and to promote the most appropriate use of land.

In order to carry out the purpose and intent of the AICUZ, the following development standards shall apply to the described conical areas, approach areas, accident potential zones and noise impact areas indicated on the official Airway Heights zoning map. The following sections provide additional detail concerning safe airport operations and use of surrounding properties. (Ord. C-675 § 208, 2008)

17.16.020 Applicability.

The AICUZ applies to FAFB. Chapter 17.15 AHMC, Airport Overlay Zone (AO), applies to Spokane International Airport. (Ord. C-675 § 209, 2008)

17.16.030 Airspace and land use safety areas.

In order to carry out the purpose and intent of the AICUZ and to restrict those uses which may be hazardous to the operational safety of aircraft operating to and from FAFB, the following air space and land use safety areas are established:

A. Primary Surface. This surface defines the limits of the obstruction clearance requirements in the immediate vicinity of the FAFB runway. The primary surface comprises surfaces of the runway, runway shoulders, and lateral safety zones and extends 200 feet beyond the runway end. The width of the primary surface for the FAFB runway is 2,000 feet, or 1,000 feet on each side of the runway centerline.

B. Approach-Departure Clearance Surface. An extension of the primary surface at each end of each runway, for a distance of 50,000 feet, first along an inclined plane (glide angle) and then along a horizontal plane, both flaring symmetrically about the runway centerline extended. The inclined plane (glide angle) begins in the clear zone 200 feet past the end of the runway, at the same elevation as the end of the runway. It continues upward at a slope of 50:1 (one foot vertically for each 50 feet horizontally) to an elevation of 500 feet above the established airfield elevation. At that point the plane becomes horizontal, continuing at that same uniform elevation to a point 50,000 feet longitudinally from the beginning of the inclined plane (glide angle) and ending there. The width of the surface at the beginning of the inclined plane (glide angle) is the same as the width of the primary surface. It then flares uniformly, reaching the maximum width of 16,000 feet at the end.

C. Transitional Surfaces. These surfaces connect the primary surface, clear zone surfaces, and approach-departure clearance surfaces to the outer horizontal surface, conical surface, other horizontal surface, or other transitional surfaces. The slope of the transitional surface is 7:1 outward and upward at right angles to the runway centerline. To determine the elevation for the beginning of the transitional surface slope at any point along the lateral boundary of the primary surface, including the clear zone, draw a line from this point to the runway centerline. This line will be at right angles to the runway axis. The elevation at the runway centerline is the elevation for the beginning of the 7:1 slope. This surface extends to a height of 150 feet, 2,050 feet from the runway centerline.

D. Inner Horizontal Surface. This surface is a plane oval in shape at a height of 150 feet above the established airfield elevation. The surface begins 2,050 feet beyond the runway centerline and the end of this surface is constructed by describing an arc with a radius of 7,500 feet above the centerline at the end of the runway and interconnecting these arcs with tangents.

E. Conical Surface. This is an inclined surface 150 feet above the established airfield elevation, extending outward and upward from the outer periphery of the inner horizontal surface (7,500 feet from runway centerline) for a horizontal distance of 7,000 feet to a height of 500 feet above the established airfield elevation. The slope of the conical surface is 20:1. This slope ends 14,500 feet from runway centerline.

F. Outer Horizontal Surface. This surface is a plane located 500 feet above the established airfield elevation. It extends for a horizontal distance of 30,000 feet from the outer periphery of the conical surface. The outermost part of this surface is 44,500 feet from runway centerline.

G. Clear Zone. The clear zone at each end of the Fairchild AFB runway is 3,000 feet wide (1,500 feet wide on each side of the runway centerline) by 3,000 feet long. Accident potential on or adjacent to the runway or within the clear zone is so high that the necessary land use restrictions would prohibit reasonable economic use of land.

H. Accident Potential Zone (APZ) I. APZ-I is 3,000 feet wide (1,500 feet wide on each side of the runway centerline) by 5,000 feet long extending to 8,000 feet from the runway threshold. Proposed uses in APZ-I shall be in accordance with the land use requirements in AHMC 17.16.110.

I. Accident Potential Zone (APZ) II. APZ-II is 3,000 feet wide (1,500 feet wide on each side of the runway centerline) by 7,000 feet long extending to 15,000 feet from the runway threshold. Proposed uses in APZ-II shall be in accordance with the land use requirements contained in AHMC 17.16.110.

J. Substantial Noise Impact Areas. Those areas where it has been determined that existing or potential noise levels exceed 65 LdN (day-night average sound level). The official Airway Heights zoning map shows where substantial noise impact areas occur or are anticipated and shall be amended when conditions change or as new information becomes available. (Ord. C-675 § 210, 2008)

17.16.040 General use restrictions.

No use shall be made of any land in the airspace and land use safety areas defined hereinabove that would cause any one of the following circumstances:

A. The use creates or causes interference with the operations of radio or electronic facilities at the airport or with radio or electronic communications between airport and aircraft.

B. The use makes it difficult for pilots to distinguish between airport lights and other lights.

C. The use results in glare in the eyes of pilots using the airports.

D. The use impairs visibility in the vicinity of the airport.

E. The use endangers the landing, taking off, or maneuvering of aircraft.

F. The use creates a bird attractant that, in the opinion of the airport, could interfere with aircraft operations.

G. The use would create a fire accelerant or secondary explosion resulting from an aircraft crash in an accident potential zone. (Ord. C-675 § 211, 2008)

17.16.050 Height restrictions.

Structures or vegetation may not be constructed, altered, maintained, or allowed to grow in any airspace area as described so as to project above the applicable surface. The following items are exempt from this provision:

A. Any structure or object that would be shielded by existing permanent structures or by natural terrain or topographic features of equal or greater height.

B. Any air navigation facility, airport visual approach or landing aid, aircraft arresting device, or meteorological device, of a type approved by the Federal Aviation Administration, or an appropriate military service at military airports, with a fixed location and height.

C. Structures necessary and incidental to airport operations.

Where an area is covered by more than one height limitation, the more restrictive limitation shall prevail. No structure shall be erected so high as to increase the Federal Aviation Administration landing and/or approach and/or departure minimums for aircraft using the runway of FAFB, unless the Installation Commander approves of such action. (Ord. C-675 § 212, 2008)

17.16.060 Administrative height exception.

The Director may administratively grant height exceptions after review of a proposal under the following procedure:

A. A request for an exception to the height restriction standards shall follow the procedures for an administrative exception as outlined in AHMC 17.03.060. (Ord. C-675 § 213, 2008)

17.16.070 Approach-departure clearance surface restrictions.

Building permits will not be issued until the final site development plans have been approved. Such approval may include requirements to mitigate impacts of the project and to ensure that the standards of the zone are upheld. (Ord. C-675 § 214, 2008)

17.16.080 AICUZ accident potential zone I (APZ-I) restrictions.

Acceptable land uses include industrial/manufacturing, transportation, communication/utilities, wholesale trade, open space and recreation. However, uses that concentrate people in small areas are not acceptable. Proposed uses in APZ-I shall be in accordance with the land use requirements in AHMC 17.16.110. (Ord. C-675 § 215, 2008)

17.16.090 AICUZ accident potential zone II (APZ-II) restrictions.

Acceptable uses include those of accident potential zone I, and those personal and business services and commercial/retail trade uses of low intensity or scale of operation. High density functions such as multistory buildings, places of assembly (theaters, churches, schools, restaurants, etc.) and high density office uses are not recommended. The optimum density recommended for residential usage (where it does not conflict with noise criteria) in accident potential zone II is one dwelling unit per acre. For most nonresidential usage, buildings shall be limited to one story and the lot coverage shall not exceed 20 percent. Proposed uses in APZ-II shall be in accordance with the land use requirements in AHMC 17.16.110. (Ord. C-675 § 216, 2008)

17.16.100 Substantial noise impact areas (LdN-65).

Proposed uses in FAFB noise zones shall be in accordance with the land use requirements contained in AHMC 17.16.110. (Ord. C-675 § 217, 2008)

17.16.110 Land use requirements.

The following are land use recommendations for the airspace and land use safety areas.

17.16 Table 1 

Land Use		Accident Potential Zones			Noise Zones
No.	Name	Clear Zone	APZ-I	APZ-II	65 – 69 Db	70 – 74 Db	75 – 79 Db	80+ Db
10	Residential
11	Household units
11.11	Single units; detached	N	N	Y1	A11	B11	N	N
11.12	Single units; semidetached	N	N	N	A11	B11	N	N
11.13	Single units; attached row	N	N	N	A11	B11	N	N
11.21	Two units; side-by-side	N	N	N	A11	B11	N	N
11.22	Two units; one above other	N	N	N	A11	B11	N	N
11.31	Apartment; walk-up	N	N	N	A11	B11	N	N
11.32	Apartment; elevator	N	N	N	A11	B11	N	N
12	Group quarters	N	N	N	A11	B11	N	N
13	Residential hotels	N	N	N	A11	B11	N	N
14	Mobile home parks	N	N	N	N	N	N	N
15	Transient lodgings	N	N	N	A11	B11	C11	N
16	Other residential	N	N	N1	A11	B11	N	N
17	Mfg.
21	Food products; Mfg	N	N2	Y	Y	Y12	Y13	Y14
22	Textile mill products; Mfg	N	N2	Y	Y	Y12	Y13	Y14
23	Mfg using fabric, leather, and similar materials	N	N	N2	Y	Y12	Y13	Y14
24	Mfg wood products (except furniture)	N	Y2	Y	Y	Y12	Y13	Y14
25	Mfg furniture and fixtures	N	Y2	Y	Y	Y12	Y13	Y14
26	Mfg paper products	N	Y2	Y	Y	Y12	Y13	Y14
27	Printing, publishing industries	N	Y2	Y	Y	Y12	Y13	Y14
28	Chemical Mfg	N	N	N2	Y	Y12	Y13	Y14
29	Petroleum refining, related industries	N	N	N	Y	Y12	Y13	Y14
31	Mfg rubber and plastic products	N	N2	N2	Y	Y12	Y13	Y14
32	Mfg stone, clay and glass products	N	N2	Y	Y	Y12	Y13	Y14
33	Primary metal industries	N	N2	Y	Y	Y12	Y13	Y14
34	Fabricated metal products	N	N2	Y	Y	Y12	Y13	Y14
35	Mfg prof., scientific, and controlling instruments; photographic and optical goods; watches and clocks	N	N	N2	Y	A	B	N
39	Misc. Mfg	N	Y2	Y2	Y	Y12	Y13	Y14
40	Transport, communications, and utilities
41	Rail-related transport	N3	Y4	Y	Y	Y12	Y13	Y14
42	Motor vehicle transport	N3	Y	Y	Y	Y12	Y13	Y14
43	Aircraft transport	N3	Y4	Y	Y	Y12	Y13	Y14
44	Marine craft transport	N3	Y4	Y	Y	Y12	Y13	Y14
45	Hwy and street right-of-way	N3	Y	Y	Y	Y12	Y13	Y14
46	Auto parking	N3	Y4	Y	Y	Y12	Y13	Y14
47	Communications	N3	Y4	Y	Y	A15	B15	N
48	Utilities	N3	Y4	Y	Y	Y	Y12	Y13
49	Other transport communications and utilities	N3	Y4	Y	Y	A15	B15	N
50	Trade
51	Wholesale trade	N	Y2	Y	Y	Y12	Y13	Y14
52	Retail – building materials, hardware, and farm equipment	N	Y2	Y	Y	Y12	Y13	Y14
53	Retail – general merchandise	N	N2	Y2	Y	A	B	N
54	Retail – food	N	N2	Y2	Y	A	B	N
55	Retail – auto, marine, aircraft, and accessories	N	Y2	Y2	Y	A	B	N
56	Retail trade – apparel and accessories	N	N2	Y2	Y	A	B	N
57	Retail – furniture and equipment	N	N2	Y2	Y	A	B	N
58	Restaurants, bars, taverns	N	N	N2	Y	A	B	N
59	Misc. retail	N	N2	Y2	Y	A	B	N
60	Services
62	Personal services	N	N	Y6	Y	A	B	N
62.4	Cemeteries	N	Y7	Y7	Y	Y12	Y13	Y14, 21
63	Business services	N	Y8	Y8	Y	A	B	N
64	Repair services	N	Y2	Y	Y	Y12	Y13	Y14
65	Professional services	N	N	Y6	Y	A	B	N
65.1	Hospitals, nursing homes	N	N	N	A*	B*	N	N
65.1	Other medical facilities	N	N	N	Y	A	B	N
66	Contractor services	N	Y6	Y	Y	A	B	N
67	Governmental services	N	N	Y6	Y*	A*	B*	N
68	Educational services	N	N	N	A*	B*	N	N
69	Misc. services	N	N2	Y2	Y	A	B	N
70	Cultural, entertainment and recreation
71	Cultural activities (including churches)	N	N	N2	A*	B*	N	N
71.2	Nature exhibits	N	Y2	Y	Y*	N	N	N
72	Public assembly	N	N	N	Y	N	N	N
72.1	Auditoriums, concert halls	N	N	N	A	B	N	N
72.11	Outdoor music shell, amphitheaters	N	N	N	N	N	N	N
72.2	Outdoor sports arenas, spectator sports	N	N	N	Y17	Y17	N	N
73	Amusements	N	N	Y8	Y	Y	N	N

    SLUCM – Standard Land Use Coding Manual, U.S. Department of Transportation.

    Y – (Yes) – Land uses and related structures are compatible without restriction.

    N – (No) – Land use and related structures are not compatible and should be prohibited.

    Yx – (Yes with restrictions) – Land use and related structures generally compatible; see notes indicated by the superscript.

    Nx – (No with exceptions) – See notes indicated by the superscript.

    NLR – Noise level reduction (NLR) (outdoor to indoor) to be achieved through incorporation of noise attenuation measures into the design and construction of the structures.

    A, B, or C – Land use and related structures generally compatible; measures to achieve NLR for A (DNL 65 – 69 dB), B (DNL 70 – 74 dB), and C (DNL 75 – 79 dB) need to be incorporated into the design and construction of structures.

    A*, B*, and C* – Land use generally compatible with NLR; however, measures to achieve an overall noise level reduction do not necessarily solve noise difficulties and additional evaluation is warranted. See appropriate notes below.

•     The designation of these uses as “compatible” in this zone reflects individual federal agency and program considerations of general cost and feasibility factors, as well as past community experiences and program objectives. Localities, when evaluating the application of these guidelines to specific situations, may have different concerns or goals to consider.

1 Suggested maximum density of one to two dwelling units per acre, possibly increased under a planned unit development (PUD) where maximum lot coverage is less than 20 percent.

2 Within each land use category, uses exist where further definition may be needed due to the variation of densities in people and structures (see Vol II, Appendix F).

3 The placing of structures, buildings or above-ground utility lines in the clear zone is subject to severe restrictions. In a majority of the clear zones, these items are prohibited (see AFR 86-14 and AFI 32-7063 for specific guidance).

4 No passenger terminals and no major above-ground transmission lines in APZ I.

5 Factors to be considered: Labor intensity, structural coverage, explosive characteristics, and air pollution.

6 Low-intensity office use only. Meeting places, auditoriums, etc., are not recommended.

7 Excludes chapels.

8 Facilities must be low intensity.

9 Clubhouse not recommended.

10 Areas for gatherings of people not recommended.

11a. Although local conditions may require residential use, it is discouraged in DNL 65-69 dB and strongly discouraged in DNL 70-74. An evaluation should be conducted prior to approvals, indicating that a demonstrated community need for residential use would not be met if development were prohibited in these zones, and that there are no viable alternative locations.

    b. Where the community determines the residential uses must not be allowed, measures to achieve outdoor to indoor noise level reduction (NLR) for DNL 65-69 dB and DNL 70-74 dB should be incorporated into building codes and considered in individual approvals (see Appendix E, 1995 AICUZ Study, Volume II, Appendices, for a reference to updated NLR procedures).

    c. NLR criteria will not eliminate outdoor noise problems. However, building location and site planning, and design and use of berms and barriers can help mitigate outdoor exposure, particularly from near ground level sources. Measures that reduce outdoor noise should be used whenever practical in preference to measures which only protect interior spaces.

12Measures to achieve the same NLR as required for facilities in the DNL 65-69 dB range must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.

13Measures to achieve the same NLR as required for facilities in the DNL 70-74 dB range must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.

14Measures to achieve the same NLR as required for facilities in the DNL 74-79 dB range must be incorporated into the design and construction of portions of these buildings where the public is received, office areas, noise-sensitive areas, or where the normal noise level is low.

15If noise sensitive, use compatible NLR; if not, the use is compatible.

16No buildings.

17Land use is compatible provided special sound reinforcement systems are installed.

18Residential buildings require the same NLR required for facilities in the DNL 65-69 dB range.

19Residential buildings require the same NLR required for facilities in the DNL 70-74 dB range.

20Residential buildings are not permitted.

21Land use is not recommended. If the community decides the use is necessary, hearing protection devices should be worn by personnel.

(Ord. C-675 § 218, 2008)