KC75 · Marshall County Airport

LACON, ILLINOIS · SMALL AIRPORT

568

Elevation ft

Runways

4,003

Longest ft · 13/31

41.02N

89.39W

Marshall County Airport serves Lacon, Illinois at 568 ft elevation with its longest runway, 13/31, at 4,003 by 75 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.

Open KC75 in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
13/31	4,003 × 75 ft	asphalt	lit
18/36	2,199 × 50 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 568 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)	568 ft	2,549 ft	2,170 ft	3,255 ft
Warm day (ISA +10)	1,768 ft	2,783 ft	2,297 ft	3,445 ft
Hot day (ISA +20)	2,968 ft	3,017 ft	2,423 ft	3,635 ft
35°C afternoon	3,104 ft	3,043 ft	2,437 ft	3,656 ft

Planning aid only. Even on a 35°C afternoon the longest runway (13/31, 4,003 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,656 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

Useful as alternates, as fuel stops when the price at KC75 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KVYS Illinois Valley Regional Airport Walter A Duncan Field	23 nm NE	5,999 ft
KPIA General Wayne A. Downing Peoria International Airport	25 nm SW	10,104 ft
KC15 Pekin Municipal Airport	34 nm SW	5,000 ft
KPNT Pontiac Municipal Airport	35 nm E	5,000 ft
KBMI Central Illinois Regional Airport at Bloomington-Normal	39 nm SE	8,000 ft
KSQI Whiteside County Airport - Joseph H Bittorf Field	45 nm N	6,499 ft

04Jet A prices and FBOs at KC75

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KC75, the app flags a price stale after two weeks, and the route finder ranks every field within a corridor of your route by net savings after the cost of the extra cycle. Log a price at KC75 or read what a fuel stop actually saves.

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