3TA0 · Four Square Ranch Airport

ROCKSPRINGS, TEXAS · SMALL AIRPORT

2,250

Elevation ft

Runway

4,093

Longest ft · 18/36

30.10N

100.41W

Four Square Ranch Airport serves Rocksprings, Texas at 2,250 ft elevation with its longest runway, 18/36, at 4,093 by 30 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
18/36	4,093 × 30 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 2,250 ft is about 10°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, 10°C)	2,250 ft	2,877 ft	2,347 ft	3,521 ft
Warm day (ISA +10)	3,450 ft	3,111 ft	2,474 ft	3,711 ft
Hot day (ISA +20)	4,650 ft	3,345 ft	2,601 ft	3,901 ft
35°C afternoon	5,190 ft	3,450 ft	2,658 ft	3,986 ft

Planning aid only. Even on a 35°C afternoon the longest runway (18/36, 4,093 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,986 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: 3TA0 is not a field to divert to or buy fuel at.

Airport	Distance	Longest runway
KJCT Kimble County Airport	42 nm NE	5,004 ft

04Fuel and services at 3TA0

There is no public FBO fuel to log at 3TA0. 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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