696 

14 CFR Ch. I (1–1–19 Edition) 

§ 77.11 

3,200 ft. in actual length, excluding hel-
iports. 

(2) 50 to 1 for a horizontal distance of 

10,000 ft. from the nearest point of the 
nearest runway of each airport de-
scribed in paragraph (d) of this section 
with its longest runway no more than 
3,200 ft. in actual length, excluding hel-
iports. 

(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 over-
crossings 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 mo-
bile object that would normally tra-
verse 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 heli-
ports: 

(1) A public use airport listed in the 

Airport/Facility Directory, Alaska 
Supplement, or Pacific Chart Supple-
ment of the U.S. Government Flight 
Information Publications; 

(2) A military airport under construc-

tion, 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 ap-
proach 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, air-

port visual approach or landing aid, 
aircraft arresting device, or meteoro-
logical device meeting FAA-approved 
siting criteria or an appropriate mili-
tary service siting criteria on military 
airports, the location and height of 
which are fixed by its functional pur-
pose; 

(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. 

§ 77.11

Supplemental notice require-

ments. 

(a) You must file supplemental no-

tice 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 no-

tice on a prescribed FAA form to be re-
ceived within the time limits specified 
in the FAA determination. If no time 
limit has been specified, you must sub-
mit supplemental notice of construc-
tion to the FAA within 5 days after the 
structure reaches its greatest height. 

(c) If you abandon a construction or 

alteration proposal that requires sup-
plemental notice, you must submit no-
tice 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 Deter-

mining Obstructions to Air 
Navigation or Navigational 
Aids or Facilities 

§ 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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