Gates/Aeronautical Study� 17,1
13' 0 1 (WED) 15: 0 8 AIRPORTS DIST OFFICE TEL:111) 0 44 () i , � oij!
U. S. Department AIRPORTS DISTRICT OFFICE
of Transportation 2725 Skyway Drive, Suits 2
Helena, IVIT 50602
Federal Aviation
Administration
OPTIONAL FORM 99 (7-9D)
January 27, 2000 FAX TRANSMITTAL ;?of poet 1x
TO, From
Mr. Chris A- Fax Kukulski, City Manager F0 1 Fax 9
City of KalispeU NSN 75413-6--317-736B 5I99-101 -4
P.O. Box 1997
Kalispell, MT 59903-1997
The Federal Aviation Administration (FAA) has conducted an aeronautical study - -asp (C
ort S
No. 99-ELN-0023-NRA) for proposed improvements at Kalispell City Airp ; 27)),
with mspect to the surrounding environs including Glacier Park Int'l Airport (FCA) an
the adjacent radio broadcast towers immediately south of the existing city airport. The
results of this study have determined that the existing radio towers in their current
configuration and height are an obstruction to air navigation as defined by Federal
Aviation Re I - - - -
7r,
_21: :;d:1111
Airport Improvement Program flunds, without the City removing the radio tower
obstructions. This determination is based on the following conclusions:
1. Realigning the runway heading so as to clear the towers from the Part 77 approach
surfaces will not eliminate the towers as an obstruction to navigable airspace. The
towns will still penetrate FAR Part 77, horizontal surfaces.
2. A reduction in the height of the towers in their current location and configuration
will not significantly lessen their impact as a potential hazard to air navigation.
3. Future instrument operations are feasible provided the radio towers are removed
and instrument procedures and operations are developed to prohibit conflicts with
existing operations at FCA.
These conclusions were reached after consideration and review from various divisions
within the FAA- Comments from the FAA Flight Standards District Office, are attached
which summarize specific concerns regarding the proposal.
This determination does not mean FAA approval or disapproval of the physical
development involved in the proposal. It is a determination with respect to the safe and
efficient use of airspace by aircraft and with respect to the safety of persons and property
on the ground. Additionally this determination has considered matters such as the effect
the proposal would have on existing or planned traffic patterns of neighboring airports.
No evaluation of ffie environmental aspects of the propose was made in reaching thiz,
determination. Therefore, this determination is not to be construed as approval of the
proposal from an environmental standpoint under Public Law 91-190 (National
Environmental Policy Act of 1969).
and heliports which should be maintained clear of obstructions. Of prime importance ari.
the approaches that should be kept clear of all obstructions below a 20:1 surface (out 20
and up 1) to the runway surface. These swfaces should clear roadways and railroads by
15 ft and 23 ft respectively (17 ft for interstate highways). The horizontal surface as
fefined by Part 77, lies 150' above the airport elevation.
interested parties as a result of this determination. If you have any questions, please
contact this office at (406) 449-5230.
Sincerely,
1 Enclosure
cc- (w/copy of enclosure)
Flight Standards District Office
Montana Aeronautics Division
Morrison Maeirle Inc, Helena, Kalispell