Chapter 17.60
AIRPORT INDUSTRIAL DISTRICT

Sections:

17.60.010    Intent.

17.60.020    Permitted uses.

17.60.030    Lot size, width, bulk, height and density standards.

17.60.040    Approach overlay district.

17.60.050    Transitional overlay district.

17.60.060    Turning overlay district.

17.60.070    Height limitations – Generally.

17.60.100    Nonconforming uses.

17.60.110    Structure and use permits.

17.60.120    Conflicting regulations.

17.60.010 Intent.

The AI district is intended to ensure that land uses at and surrounding the city of Tonasket Municipal Airport and adjoining city-owned property recognizes the priority nature of aviation in the area. The district is intended to provide a basis for implementation of the comprehensive plan airport industrial designation and Federal Aviation Administration and Washington State Department of Transportation regulations and guidelines for general aviation facilities. (Ord. 778 § 2 (Exh. A), 2017).

17.60.020 Permitted uses.

In an AI district uses and their accessory uses are permitted as listed in Table 1 – District Use Chart, TMC 17.70.020. (Ord. 778 § 2 (Exh. A), 2017).

17.60.030 Lot size, width, bulk, height and density standards.

In an AI district lot size, width, bulk, height and density standards are listed in Table 2, TMC 17.70.080, and height limitations of TMC 17.60.070. (Ord. 778 § 2 (Exh. A), 2017).

17.60.040 Approach overlay district.

A noninstrument approach surface is established at each end of all noninstrument runways for aircraft landing and takeoff. The elevation of the runway at the Tonasket airport is 1,311 feet MSL. The inner width of the approach surface is 250 feet at its line of origination at the runway threshold, and it expands uniformly to a width of 1,250 feet at a horizontal distance of 5,280 feet from the runway threshold. This approach surface is at ground level for a distance of 200 feet from the runway threshold, and thereafter it extends upward at a slope of 20 to one. The elevation of the inner width of the approach surface is the same as the elevation of the primary datum. (Ord. 778 § 2 (Exh. A), 2017).

17.60.050 Transitional overlay district.

The transitional surfaces extend outward and upward for a horizontal distance of 5,280 feet at right angles to the runway centerline, and extend upward at a slope of seven to one from a line located 100 feet from, and parallel to, the runway centerline, except that where the transition surface would come within 150 feet of the ground in high terrain located east or west of the runway, the minimum height of the transition surface shall be 150 feet above the ground. The transition overlay district is bounded on either side by a turning overlay district. The elevation of the line 100 feet from the runway centerline is the same as the elevation of the primary datum. (Ord. 778 § 2 (Exh. A), 2017).

17.60.060 Turning overlay district.

The turning surfaces extend outward and upward from the runway at a point located in the center of the threshold. Each turning overlay district is bounded by the surfaces of the approach overlay district and the transitional overlay district, and an arc with radius of 5,280 feet that is subtended from a point located at the center of the runway threshold. (Ord. 778 § 2 (Exh. A), 2017).

17.60.070 Height limitations – Generally.

Except as otherwise provided in this chapter, no structure or tree shall be erected, altered, allowed to grow or be maintained so as to penetrate into any overlay district created in this chapter as described in TMC 17.60.040 through 17.60.060. Uses of the underlying lands that create dust, glare, or concentrations of birds that affect the use of the overlay district shall be considered violations of the height limitations set forth herein. (Ord. 778 § 2 (Exh. A), 2017).

17.60.100 Nonconforming uses.

A. The regulations prescribed in this chapter shall not be construed to require the removal, lowering, or other change or alteration of any structure or tree not conforming to the regulations as of adoption of this code, or otherwise interfere with the continuance of any nonconforming use.

B. Notwithstanding the provisions of subsection (A) of this section, the owner of any nonconforming structure or tree may be required to install, operate, and maintain thereon such markers and lights as are deemed necessary by the airport manager to indicate to the operators of aircraft in the vicinity of the airport the presence of airport hazards or obstructions. (Ord. 778 § 2 (Exh. A), 2017).

17.60.110 Structure and use permits.

A. Before any nonconforming structure or tree may be replaced, substantially altered, repaired, rebuilt, allowed to grow taller or replanted, a permit shall be secured from the applicable building department with the concurrence of the airport commission.

B. No permit shall be granted that would allow the establishment or creation of an airport hazard, or permit a nonconforming use to be made higher or become a greater hazard to navigation than it was on January 1, 1993, or when a permit is granted, whichever is later.

C. Requests for height variances in any airport overlay district shall be processed in the same manner as any other request for administrative variance to land use zoning regulations, with the addition of the following steps:

1. The application for variance shall be referred to the airport commission for written review and comment prior to action by any other administrative body. The airport commission shall complete its review within 15 days of receiving the application. The airport commission’s failure to provide written comments within that period shall be interpreted as approval of the requested variance.

2. Any permit or variance issued for any structure or use in any airport height limitation overlay district may be conditioned on the installation, operation and maintenance of markers and lights to indicate the presence of an airport hazard. Required markers and lights shall be purchased, installed and maintained at the expense of the owner of the obstruction. (Ord. 778 § 2 (Exh. A), 2017).

17.60.120 Conflicting regulations.

Where there exists a conflict between any of the regulations or limitations prescribed in this chapter and any other regulations applicable to the same areas, whether the conflict is with respect to the height of structures or trees, the use of land or any other matter, the more stringent limitations or requirements shall prevail. (Ord. 778 § 2 (Exh. A), 2017).