1LL2
Spring Brook Airport
Spring Brook Airport (1LL2) is a general-aviation airfield serving Seneca, Illinois. The field lies at 500 ft (152 m) above sea level and has a single runway of 2,800 ft (853 m), asphalt and lit. Its nearest neighbour is Mitchell Restricted Landing Area Airport (67IL), 3 nm N.
Spring Brook Airport is a smaller field, so Alārium does not attribute movements to it directly — but aircraft flying near it appear on the live map like any other, at their real altitude and on their real track.
Location
- Elevation
- 500 ft (152 m)
- Coordinates
- 41.3006, -88.6333
- Serving
- Seneca
- Region
- Illinois
- Time zone
- America/Chicago
Runways1 · longest 2,800 ft
The diagram shows each runway’s orientation and relative length, read from its designator — runway 18 points 180° magnetic. Threshold coordinates are not published for this field, so strips are drawn about its centre rather than where they sit on the ground. It is a diagram, not a chart to navigate by.
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| 18/36 | 2,800 ft853 m | 70 ft | Asphalt | Lit |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.