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655 

Federal Aviation Administration, DOT 

§ 77.9 

at FAA regional offices and on the 
Internet. 

(b) You must submit this form at 

least 45 days before the start date of 
the proposed construction or alteration 
or the date an application for a con-
struction permit is filed, whichever is 
earliest. 

(c) If you propose construction or al-

teration that is also subject to the li-
censing requirements of the Federal 
Communications Commission (FCC), 
you must submit notice to the FAA on 
or before the date that the application 
is filed with the FCC. 

(d) If you propose construction or al-

teration to an existing structure that 
exceeds 2,000 ft. in height above ground 
level (AGL), the FAA presumes it to be 
a hazard to air navigation that results 
in an inefficient use of airspace. You 
must include details explaining both 
why the proposal would not constitute 
a hazard to air navigation and why it 
would not cause an inefficient use of 
airspace. 

(e) The 45-day advance notice re-

quirement is waived if immediate con-
struction or alteration is required be-
cause of an emergency involving essen-
tial public services, public health, or 
public safety. You may provide notice 
to the FAA by any available, expedi-
tious means. You must file a completed 
FAA Form 7460–1 within 5 days of the 
initial notice to the FAA. Outside nor-
mal business hours, the nearest flight 
service station will accept emergency 
notices. 

§ 77.9

Construction or alteration re-

quiring notice. 

If requested by the FAA, or if you 

propose any of the following types of 
construction or alteration, you must 
file notice with the FAA of: 

(a) Any construction or alteration 

that is more than 200 ft. AGL at its 
site. 

(b) Any construction or alteration 

that exceeds an imaginary surface ex-
tending outward and upward at any of 
the following slopes: 

(1) 100 to 1 for a horizontal distance 

of 20,000 ft. from the nearest point of 
the nearest runway of each airport de-
scribed in paragraph (d) of this section 
with its longest runway more than 

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, 

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656 

14 CFR Ch. I (1–1–24 Edition) 

§ 77.11 

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: 

(a) Any object of natural growth, ter-

rain, or permanent or temporary con-
struction or alteration, including 
equipment or materials used and any 
permanent or temporary apparatus. 

(b) The alteration of any permanent 

or temporary existing structure by a 
change in its height, including appur-
tenances, or lateral dimensions, includ-
ing equipment or material used there-
in. 

§ 77.15

Scope. 

(a) This subpart describes standards 

used to determine obstructions to air 
navigation that may affect the safe and 
efficient use of navigable airspace and 
the operation of planned or existing air 
navigation and communication facili-
ties. Such facilities include air naviga-
tion aids, communication equipment, 
airports, Federal airways, instrument 
approach or departure procedures, and 
approved off-airway routes. 

(b) Objects that are considered ob-

structions under the standards de-
scribed in this subpart are presumed 
hazards to air navigation unless fur-
ther aeronautical study concludes that 
the object is not a hazard. Once further 
aeronautical study has been initiated, 
the FAA will use the standards in this 
subpart, along with FAA policy and 
guidance material, to determine if the 
object is a hazard to air navigation. 

(c) The FAA will apply these stand-

ards with reference to an existing air-
port facility, and airport proposals re-
ceived by the FAA, or the appropriate 
military service, before it issues a final 
determination. 

(d) For airports having defined run-

ways with specially prepared hard sur-
faces, the primary surface for each run-
way extends 200 feet beyond each end of 
the runway. For airports having de-
fined strips or pathways used regularly 
for aircraft takeoffs and landings, and 
designated runways, without specially 
prepared hard surfaces, each end of the 
primary surface for each such runway 
shall coincide with the corresponding 
end of the runway. At airports, exclud-
ing seaplane bases, having a defined 
landing and takeoff area with no de-
fined pathways for aircraft takeoffs 
and landings, a determination must be 
made as to which portions of the land-
ing and takeoff area are regularly used 

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