KBTM Bert Mooney

UNKNOWN

Unknown — not enough evidence to call a runway

We don't know, and saying so beats guessing. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available.

certainty: — evidence: NONE no tower now Class E

Wind 160° true at 3 kt · VFR · 47 min old

▶ Listen live — ATIS/CTAF on LiveATC opens LiveATC’s own player · verify the broadcast yourself

15 31% 9000 ft · 3 kt head, 0 kt x-left · right traffic

12 28% 5100 ft · 3 kt head, 2 kt x-right

33 21% 9000 ft · 3 kt TAIL, 0 kt x-right

30 20% 5100 ft · 3 kt TAIL, 2 kt x-left

Active NOTAMs affecting runways

SURFACE until 10-09 12:00Z

AD AP SFC COND NOT REP

Why — evidence behind this answer

Runway 15

WIND 3 kt headwind, 0 kt left crosswind 47 min ago +0.10
PRIOR runway length 9000 ft +0.06

Runway 12

WIND 3 kt headwind, 2 kt right crosswind 47 min ago +0.08
PRIOR runway length 5100 ft -0.06

Runway 33

WIND 3 kt TAILWIND, 0 kt right crosswind 47 min ago -0.29
PRIOR runway length 9000 ft +0.06

Runway 30

WIND 3 kt TAILWIND, 2 kt left crosswind 47 min ago -0.24
PRIOR runway length 5100 ft -0.06

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	47 min
ADSB	UNAVAILABLE		No ADS-B track history here yet
NOTAM	OK
CIFP	NOT_CONFIGURED		Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (No ADS-B track history here yet)

Was this right?

KBTM field & runways

Bert Mooney, Butte, Montana. Field elevation 5550 ft. Class E airspace. Non-towered (NON-ATCT). Magnetic variation 12.0°E on record, 11.8°E today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.099°/year west — about 1° every 10 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against *today's* declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
Runway	True	Magnetic	Number	Length	Surface	Pattern	Notes
12	129.2°	117.5°	matches	5,100 ft	ASPH	left
15	166.9°	155.2°	runway 16 by the rule today · 5.2° past	9,000 ft	ASPH	right	ILS
30	309.2°	297.5°	matches	5,100 ft	ASPH	left
33	346.9°	335.2°	runway 34 by the rule today · 5.2° past	9,000 ft	ASPH	left

Generated 08:39:49Z · auto-refreshes · JSON

KBTM ☆ Bert Mooney