Twin Bridges
Twin Bridges, Montana

FAA NFDC Information Effective 56-day cycle 08/20/2015 - 10/15/2015

Ops Comms Services Owner Runways IFR Procs Current NOTAMs Remarks


FAA Identifier:7S1 (Seven-Sierra-One)
Lat/Lng: 45.5354265556, -112.302127528
45-32-07.5356N, 112-18-07.6591W
Estimated by FAA-EST on 07/16/2015
Elevation: 4788 feet Estimated by ADO on 09/17/2013
Magnetic Variation: 17E, (1985), [13E (2015)]
Sectional: GREAT FALLS
From City: 2nm SE of Twin Bridges


Use: Open to the public
Ownership: Publicly owned
Activation: 04/1940
Attended: All year Mon-Fri 0800-1700 (local)
Control Tower: no
ARTCC: Salt Lake City Center (ZLC)
FSS: Great Falls FSS (GTF)
NOTAMs and Weather: GTF NOTAM-D service at airport
Wind Indicator: Lighted
Segmented Circle: yes
Lights: Activate MIRL Runway 17/35 and PAPI Runways 17 & 35 - CTAF.
Beacon: Sunset-Sunrise (local time)
Clear-Green (Lighted Land Airport)
Landing Fee: no


CTAF: 122.900


Fuel: Grade 100LL Gasoline (low lead blue)
Jet A - Kerosene, freeze point -40C
Airframe Repair: Major
Powerplant Repair: Major
Bottled Oxygen: High/Low pressure
Bulk Oxygen: None
Transient Storage: Hanger,Tie-Down
Other Services: Avionics

Based Aircraft

Single Engine GA: 7
Multi Engine GA: 1
Jet GA: 1
Ultralights: 1
Ultralights on & in View of Airport.
Total: 10

Annual Operations

For year ending: 05/13/2015
AirTaxi: 100
Local GA (< 20 miles): 1100
Non-local GA: 1500
Military Operations: 50
Total: 2750


Owner: Madison Co & Town of Twin Bridges
Box 278
Virginia City, Mt 59775-0278
Manager: Mike Floyd
Po Box 52
Virginia City, Mt 59755
or (406) 684-5335.


Runways: 07/25

Runway 07/25

Length: 2865 feet
by Ado on 09/17/2013
Width: 100 feet
Surface: Grass / Sod, Gravel, Fair Condition
End 07 End 25
True Alignment: 083, (070 Magnetic) 263, (250 Magnetic)
Gradient: 2.1 Up
2.1 Down
Elevation at End: 4706.0' MSL 4776.7' MSL
Elevation at Touchdown Zone: 4768.0' MSL 4778.0' MSL
Objects affecting Navigable Airspace (CFR part 77): Utility runway with a visual approach Utility runway with a visual approach
Object Clearance Slope: 20:1 20:1

Runway 17/35

Length: 6000 feet
by Ado on 09/17/2013
Width: 60 feet
Surface: Asphalt / Bituminous Concrete, Good Condition
Weight Capacity: Single Wheel aircraft: 12,000 lbs
Runway Lights Edge Intensity: Med Intensity
End 17 End 35
True Alignment: 182, (169 Magnetic) 002, (349 Magnetic)
Runway Markings: Nonprecision Instrument, Fair Condition Nonprecision Instrument, Fair Condition
Gradient: 0.4 Down 0.4 Up
Elevation at End: 4777.1' MSL 4759.9' MSL
Elevation at Touchdown Zone: 4777.0' MSL 4773.0' MSL
Threshold Crossing Glide Path Height: 25' AGL 35' AGL
Visual Glide Path Angle: 3.00° 3.00°
Visual Glide Slope Indicator: 2-light PAPI on left side of runway 2-light PAPI on left side of runway
Objects affecting Navigable Airspace (CFR part 77): Utility runway with a visual approach Utility runway with a visual approach
Object Clearance Slope: 50:1 50:1



Additional Remarks

Deer & Antelope on & in View of Airport.
195 Ft Tall Tower 1.4 NM 'NE' of Runway 17 Threshold.

This information is current as of the date at the top of the page. These pages are valid for all US airports, based on information from FAA National Flight Data Center. Weather information is provided based on AvnWx Data Sources. NOTAM information is from FAA's NAIMES data portal.

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