37N Garrison Dam Recreational Airpark

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. No weather observation available.

certainty: — evidence: NONE no tower now

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11 50% 3195 ft · right traffic

29 50% 3195 ft

Why — evidence behind this answer

Sources consulted

source	status	note
D_ATIS	UNAVAILABLE	No D-ATIS at this field
METAR	UNAVAILABLE	No weather observation found
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?

37N field & runways

Garrison Dam Recreational Airpark, Riverdale, North Dakota. Field elevation 1723 ft. Non-towered (NON-ATCT). Magnetic variation 10.0°E on record, 5.9°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 0.069°/year west — about 1° every 14 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
11	122.2°	116.3°	runway 12 by the rule today · 6.3° past	3,195 ft	TURF-GRVL	right
29	302.2°	296.3°	runway 30 by the rule today · 6.3° past	3,195 ft	TURF-GRVL

Generated 10:21:54Z · auto-refreshes · JSON