runwayinuse

51IL Roca Grande Rla

27
PROBABLE 67%

Runway 27 — wind slightly favors it, low confidence

Based mostly on wind; no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available.

certainty: 67% evidence: NONE no tower now

N 27 9

Wind 210° true at 5 kt · VFR · 31 min old · from KDPA (17.2 nm away)

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27 65% 2721 ft · 3 kt head, 4 kt x-left
9 35% 2721 ft · 3 kt TAIL, 4 kt x-right
Why — evidence behind this answer

Runway 27

Runway 9

Sources consulted

sourcestatus agenote
D_ATISUNAVAILABLE No D-ATIS at this field
METAROK 31 min Nearest station KDPA (17.2 nm away)
ADSBUNAVAILABLE No ADS-B track history here yet
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

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

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51IL field & runways

Roca Grande Rla, Big Rock, Illinois. Field elevation 762 ft. Non-towered (NON-ATCT). Private use.

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 0.035°/year west — about 1° every 29 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.
RunwayTrueMagnetic Number LengthSurfacePattern Notes
27 268.7° 272.2° matches 2,721 ft TURF left
9 88.7° 92.2° matches 2,721 ft TURF left

Generated 12:23:05Z · auto-refreshes · JSON