Sec. 17.7  Antenna structures requiring notification to the FAA.

    A notification to the Federal Aviation Administration is required, 
except as set forth in Sec. 17.14, for any of the following construction 
or alteration:
    (a) Any construction or alteration of more than 60.96 meters (200 
feet) in height above ground level at its site.
    (b) Any construction or alteration of greater height than an 
imaginary surface extending outward and upward at one of the following 
slopes:
    (1) 100 to 1 for a horizontal distance of 6.10 kilometers (20,000 
feet) from the nearest point of the nearest runway of each airport 
specified in paragraph (d) of this section with at least one runway more 
than 0.98 kilometers (3,200 feet) in actual length, excluding heliports.
    (2) 50 to 1 for a horizontal distance of 3.05 kilometers (10,000 
feet) from the nearest point of the nearest runway of each airport 
specified in paragraph (d) of this section with its longest runway no 
more than 0.98 kilometers (3,200 feet) in actual length, excluding 
heliports.
    (3) 25 to 1 for a horizontal distance of 1.52 kilometers (5,000 
feet) from the nearest point of the nearest landing and takeoff area of 
each heliport specified in paragraph (d) of this section.
    (c) When requested by the FAA, any construction or alteration that 
would be in an instrument approach area (defined in the FAA standards 
governing instrument approach procedures) and available information 
indicates it might exceed an obstruction standard of the FAA.
    (d) Any construction or alteration on any of the following airports 
(including heliports):
    (1) An airport that is available for public use and is listed in the 
Airport Directory of the current Airman's Information Manual or in 
either the Alaska or Pacific Airman's Guide and Chart Supplement.
    (2) An airport under construction, that is the subject of a notice 
or proposal on file with the Federal Aviation Administration, and except 
for military airports, it is clearly indicated that the airport will be 
available for public use.
    (3) An airport that is operated by an armed force of the United 
States.

    Note: Consideration to aeronautical facilities not in existence at 
the time of the filing of the application for radio facilities will be 
given only when proposed airport construction or improvement plans are 
on file with the Federal Aviation Administration as of the filing date 
of the application for such radio facilities.

[ 39 FR 7581 , Feb. 27, 1974, as amended at  39 FR 26157 , July 17, 1974;  42 FR 54823 , Oct. 11, 1977;  42 FR 57127 , Nov. 1, 1977]