Airfield Safety MCA Subzone A (CZ)
Subzone A includes all land outside the installation boundary within the CZs. Within the
CZ, most land uses are incompatible with aircraft operations. It is recommended that no
development be located within CZs.
Airfield Safety MCA Subzone B (APZ)
Subzone B includes all land outside the installation boundary within the APZs.
Compatibility guidelines recommend land uses that concentrate large numbers of people
(such as residences, apartments, churches, and schools) not be constructed within the
APZs. While the likelihood of an accident is remote, the military recommends low density
land uses within the APZs to ensure the maximum protection of public health and
property.
Airfield Obstructions MCA (Figure 20)
The Picacho Peak Stagefield Airfield Obstructions MCA includes all land outside the
installation boundaries within the existing and potential imaginary surfaces associated
existing and potential future helicopter landing lanes. The purpose of the Airfield
Obstructions MCA is to manage the height of all structures and buildings within the area
defined by Federal Aviation Administration (FAA) and DoD guidance known as imaginary
surfaces. The imaginary surfaces are 3-D geographic areas comprising
approach‐departure airspace corridors and safety buffers. Vertical obstruction heights
are a major concern for flight operations and training due to the potential for a structure
to extend into navigable airspace, which could impede safe flight operations and put both
pilots and citizens on the ground at risk of an aircraft accident. Vertical obstructions that
can affect flight safety include, but are not limited to, cell towers, power lines, wind
turbines, buildings, and trees. Although the AZARNG has expressed interest in
constructing additional landing lanes at Picacho Peak Stagefield, no decisions have been
made for a location or orientation. This MCA illustrates a potential layout for the landing
lanes, but would need to be updated if they are eventually constructed to ensure
accuracy. This MCA has two subzones.
Airfield Obstructions MCA Subzone A
Subzone A is composed of the existing and potential approach‐departure clearance
surfaces for the landing lanes. Subzone A begins as inclined planes at the end of the
primary surface and extend for 1,200 feet. The slope of the approach‐departure
clearance surface is 8:1. The width of this surface at the primary surface is 300 feet,
widening uniformly to a width of 600 feet at the end point.
Airfield Obstructions MCA Subzone B
Subzone B is composed of the existing and potential transitional surfaces for the landing
lanes. The transitional surface extends outward and upward at right angles to the
primary surface and extended landing lane at a slope of 2:1. The transitional surface
Pinal County Joint Land Use Study
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