§ 27-548.54. Requirements for Height.

(a)

For purposes of the Military Installation Overlay Zone, heights are measured from the base of a structure to the highest point of any part of the structure, including, but not limited to, antennae, towers, poles, monopoles, or satellite dishes.

(b)

No development, structure, or alteration of the land shall exceed the height established by the Impact Map for Height.

(c)

At the time of building permit, a licensed Engineer or qualified professional of competent expertise shall certify that structures do not exceed the height established by the Impact Map for Height, utilizing the formulae and methodology set forth in this Section.

(d)

Areas of Prince George's County defined by the 2009 Joint Base Andrews Naval Air Facility Washington Joint Land Use Study as Imaginary Surfaces "C" (part of the Approach-Departure Clearance Surface) and "F" (Outer Horizontal Surface) are not subject to the Provisions of this Part.

(e)

The Planning Board shall verify certification of height using the formulae proscribed in this Section as described below:

(1)

Military Installation Overlay Zone height formulae are based upon the highest elevation of the subject property in relation to the elevation of the runways at Joint Base Andrews, which are 274 feet above sea level.

(2)

The figures calculated through the measurements in this Section should add the difference in elevation between the runways at Joint Base Andrews and the highest elevation on the subject property: properties lower than 274 feet in elevation should add this difference in elevation; properties higher than 274 feet in elevation should subtract this difference in elevation to determine the maximum height:

(A)

Surface A (Primary Surface): No structures permitted.

(B)

Surface B (Approach-Departure Clearance Surface): Structures shall not exceed a height (in feet) equivalent to the distance between Surface A and nearest boundary of the subject property, divided by 50.

(C)

Surface D (Inner Horizontal Surface): Structures shall not exceed a height (in feet) equivalent to 150 feet.

(D)

Surface E (Conical Surface): Structures shall not exceed a height (in feet) equivalent to the total of the following equation:

(i)

Subtotal: The distance between Surface A and nearest boundary of the subject property, less the distance between the subject property and the border of Surfaces D and E.

(ii)

Total: Divide subtotal by 20, then add 150.

(E)

Surface G: Transitional Surface 7:1: Structures shall not exceed a height (in feet) equivalent to the total of the following equation:

(i)

Subtotal 1: The distance between the nearest edge of Surface A to a point on Surface B approximately horizontal (east-to-west) from the nearest edge of the property, divided by 50.

(ii)

Subtotal 2: The distance between the imaginary point on Surface B horizontal to the property and the nearest edge of the subject property, less the distance between this imaginary point and the edge of Surface G.

(iii)

Subtotal 3: Divide Subtotal 2 by 7.

(iv)

Add Subtotals 1 and 3.

(CB-42-2015)