[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR77.21]

[Page 161-162]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 77_OBJECTS AFFECTING NAVIGABLE AIRSPACE--Table of Contents
 
                     Subpart C_Obstruction Standards
 
Sec.  77.21  Scope.


    (a) This subpart establishes standards for determining obstructions 
to air navigation. It applies to existing and proposed manmade objects, 
objects of natural growth, and terrain. The standards apply to the use 
of navigable

[[Page 162]]

airspace by aircraft and to existing air navigation facilities, such as 
an air navigation aid, airport, Federal airway, instrument approach or 
departure procedure, or approved off-airway route. Additionally, they 
apply to a planned facility or use, or a change in an existing facility 
or use, if a proposal therefor is on file with the Federal Aviation 
Administration or an appropriate military service on the date the notice 
required by Sec.  77.13(a) is filed.
    (b) At those airports having defined runways with specially prepared 
hard surfaces, the primary surface for each such runway extends 200 feet 
beyond each end of the runway. At those airports having defined strips 
or pathways that are used regularly for the taking off and landing of 
aircraft and have been designated by appropriate authority as runways, 
but do not have specially prepared hard surfaces, each end of the 
primary surface for each such runway shall coincide with the 
corresponding end of the runway. At those airports, excluding seaplane 
bases, having a defined landing and takeoff area with no defined 
pathways for the landing and taking off of aircraft, a determination 
shall be made as to which portions of the landing and takeoff area are 
regularly used as landing and takeoff pathways. Those pathways so 
determined shall be considered runways and an appropriate primary 
surface as defined in Sec.  77.25(c) will be considered as being 
longitudinally centered on each runway so determined, and each end of 
that primary surface shall coincide with the corresponding end of that 
runway.
    (c) The standards in this subpart apply to the effect of 
construction or alteration proposals upon an airport if, at the time of 
filing of the notice required by Sec.  77.13(a), that airport is--
    (1) 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; or
    (2) A planned or proposed airport or 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 that airport will be available for public use; 
or,
    (3) An airport that is operated by an armed force of the United 
States.

[Doc. No. 1882, 30 FR 1839, Feb. 10, 1965, as amended by Amdt. 77-5, 33 
FR 5257, Apr. 2, 1968; Amdt. 77-9, 36 FR 5970, Apr. 1, 1971]