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Section 77.11

14 CFR Ch. I (1-1-19 Edition)

3,200 ft. in actual length, excluding heliports.
(2) 50 to 1 for a horizontal distance of
10,000 ft. from the nearest point of the
nearest runway of each airport described in paragraph (d) of this section
with its longest runway no more than
3,200 ft. in actual length, excluding heliports.
(3) 25 to 1 for a horizontal distance of
5,000 ft. from the nearest point of the
nearest landing and takeoff area of
each heliport described in paragraph
(d) of this section.
(c) Any highway, railroad, or other
traverse way for mobile objects, of a
height which, if adjusted upward 17 feet
for an Interstate Highway that is part
of the National System of Military and
Interstate
Highways
where
overcrossings are designed for a minimum
of 17 feet vertical distance, 15 feet for
any other public roadway, 10 feet or
the height of the highest mobile object
that would normally traverse the road,
whichever is greater, for a private
road, 23 feet for a railroad, and for a
waterway or any other traverse way
not previously mentioned, an amount
equal to the height of the highest mobile object that would normally traverse it, would exceed a standard of
paragraph (a) or (b) of this section.
(d) Any construction or alteration on
any of the following airports and heliports:
(1) A public use airport listed in the
Airport/Facility
Directory,
Alaska
Supplement, or Pacific Chart Supplement of the U.S. Government Flight
Information Publications;
(2) A military airport under construction, or an airport under construction
that will be available for public use;
(3) An airport operated by a Federal
agency or the DOD.
(4) An airport or heliport with at
least one FAA-approved instrument approach procedure.
(e) You do not need to file notice for
construction or alteration of:
(1) Any object that will be shielded
by existing structures of a permanent
and substantial nature or by natural
terrain or topographic features of equal
or greater height, and will be located
in the congested area of a city, town,
or settlement where the shielded struc-

ture will not adversely affect safety in
air navigation;
(2) Any air navigation facility, airport visual approach or landing aid,
aircraft arresting device, or meteorological device meeting FAA-approved
siting criteria or an appropriate military service siting criteria on military
airports, the location and height of
which are fixed by its functional purpose;
(3) Any construction or alteration for
which notice is required by any other
FAA regulation.
(4) Any antenna structure of 20 feet
or less in height, except one that would
increase the height of another antenna
structure.
Section 77.11 Supplemental
ments.

notice

(a) You must file supplemental notice with the FAA when:
(1) The construction or alteration is
more than 200 feet in height AGL at its
site; or
(2) Requested by the FAA.
(b) You must file supplemental notice on a prescribed FAA form to be received within the time limits specified
in the FAA determination. If no time
limit has been specified, you must submit supplemental notice of construction to the FAA within 5 days after the
structure reaches its greatest height.
(c) If you abandon a construction or
alteration proposal that requires supplemental notice, you must submit notice to the FAA within 5 days after the
project is abandoned.
(d) If the construction or alteration
is dismantled or destroyed, you must
submit notice to the FAA within 5 days
after the construction or alteration is
dismantled or destroyed.

Subpart C - Standards for Determining Obstructions to Air
Navigation or Navigational
Aids or Facilities
Section 77.13

Applicability.

This subpart describes the standards
used for determining obstructions to
air navigation, navigational aids, or
navigational facilities. These standards
apply to the following:

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