MIL-HDBK-1003/7
a) One hundred to one for a horizontal distance of 20,000 feet from
the nearest point of the nearest runway of each airport which has at least one runway
more than 3,200 feet in actual length excluding heliports.
b) Fifty to one for a horizontal distance of 10,000 feet from the
nearest point of the nearest runway of each airport which has at least one runway more
than 3,200 feet in actual length excluding heliports.
c) Twenty-five to one for a horizontal distance of 5,000 feet from
the nearest point of the nearest landing and takeoff area of each heliport.
18.5.7.1 Forms. The FAA is notified by filing four copies of FAA Form 7460-1, "Notice
of Proposed Construction or Alteration." This notice should be forwarded to the
appropriate FAA Regional Office. The notification form must be submitted not later than
30 days prior to the date the proposed construction is to begin.
The FAA will acknowledge in writing the receipt of each notice. If the
construction or alteration proposed is one for which marking standards are prescribed in
the FAA Advisory Circular AC 70/7460-1, the acknowledgment will contain a statement that
the structure must be marked and lighted in accordance with the circular. The
acknowledgment will also state that an aeronautical study has reached one of the
following conclusions concerning the construction or alteration.
a) It would not exceed an obstruction standard and would not be a
hazard to air navigation.
b)
It would exceed an obstruction standard but would not be a hazard
to air navigation.
c) It would exceed an obstruction
standard and further aeronautical
study is necessary to determine whether it would be
a hazard to air navigation. In such
cases, the sponsor must request within 30 days that
the FAA complete its studies.
Pending completion of these studies, it is presumed
the construction or alteration would
be a hazard.
An existing or future structure is considered to be an obstruction to
air navigation if it is of greater height than 500 feet above ground level at the site
of the object, or greater than certain lesser heights within 6 nautical miles of an
airport.
18.5.7.2 Supplemental Notice. A supplemental notice filed on FAA Form 117-1, "Notice
of Progress of Construction or Alteration," must be filed with the Chief of the Air
Traffic Division having jurisdiction over the FAA Region 5 days after the construction
reaches its greatest height in the following instances.
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