IA24 · Green Castle Airport

OXFORD, IOWA · SMALL AIRPORT

750

Elevation ft

Runway

4,000

Longest ft · SE/NW

41.76N

91.73W

Green Castle Airport serves Oxford, Iowa at 750 ft elevation with its longest runway, SE/NW, at 4,000 by 60 ft. The figures below are computed from FAA NASR runway data (via OurAirports) and the same rules of thumb JetDesk uses on the airport page in the app; the POH and current NOTAMs are the authority.

Private-use airfield. The FAA file marks this field private use. It is listed here for reference. Landing needs the owner's prior permission, and there may be no fuel or services. Do not plan it as a fuel stop or a routine alternate.

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01Runways

Runway	Length × width	Surface	Lighting
SE/NW	4,000 × 60 ft	asphalt and turf	lit

02Density altitude and turboprop runway margins

Standard temperature at 750 ft is about 14°C. Every 1,000 ft of density altitude adds roughly 8 percent to a turboprop's takeoff distance and 5 percent to its landing distance. The table uses Piper Meridian book numbers (2,438 ft takeoff and 2,110 ft landing over a 50 ft obstacle at sea level, ISA, max weight) as a reference airplane; heavier turboprops and light jets scale the same way from their own POH figures.

Conditions	Density altitude	Takeoff est.	Landing est.	Landing × 1.5
Standard day (ISA, 14°C)	750 ft	2,584 ft	2,189 ft	3,284 ft
Warm day (ISA +10)	1,950 ft	2,818 ft	2,316 ft	3,474 ft
Hot day (ISA +20)	3,150 ft	3,052 ft	2,442 ft	3,663 ft
35°C afternoon	3,330 ft	3,087 ft	2,461 ft	3,692 ft

Planning aid only. Even on a 35°C afternoon the longest runway (SE/NW, 4,000 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,692 ft needed). The percentages are a generic rule of thumb applied to one reference airplane, not certified performance data for any specific aircraft, and the runway size categories describe the runway, not your airplane's suitability. Verify with the approved flight manual before every flight.

03Nearby fields with 5,000 ft or more

Listed for reference only: IA24 is not a field to divert to or buy fuel at.

Airport	Distance	Longest runway
KIOW Iowa City Municipal Airport	11 nm SE	5,002 ft
KMUT Muscatine Municipal Airport	35 nm SE	5,500 ft
KIIB Independence Municipal Airport	43 nm N	5,500 ft
KFFL Fairfield Municipal Airport	44 nm S	5,503 ft
KGGI Grinnell Regional Airport	45 nm W	5,200 ft
KOTM Ottumwa Regional Airport	51 nm SW	6,001 ft

04Fuel and services at IA24

There is no public FBO fuel to log at IA24. JetDesk collects Jet A prices that pilots actually paid, at civil fields, and its route finder leaves military and private-use fields out of every ranking. Read what a fuel stop actually saves.

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