KSQI · Whiteside County Airport - Joseph H Bittorf Field

ROCK FALLS, ILLINOIS · SMALL AIRPORT

648

Elevation ft

Runways

6,499

Longest ft · 07/25

41.74N

89.67W

Whiteside County Airport - Joseph H Bittorf Field serves Rock Falls, Illinois at 648 ft elevation with its longest runway, 07/25, at 6,499 by 150 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 KSQI in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
07/25	6,499 × 150 ft	asphalt	lit
18/36	3,900 × 100 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 648 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)	648 ft	2,564 ft	2,178 ft	3,268 ft
Warm day (ISA +10)	1,848 ft	2,798 ft	2,305 ft	3,457 ft
Hot day (ISA +20)	3,048 ft	3,032 ft	2,432 ft	3,647 ft
35°C afternoon	3,204 ft	3,063 ft	2,448 ft	3,672 ft

Planning aid only. Even on a 35°C afternoon the longest runway (07/25, 6,499 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,672 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 KSQI is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KRPJ Rochelle Municipal Airport - Koritz Field	28 nm E	5,001 ft
KCWI Clinton Municipal Airport	30 nm W	5,204 ft
KFEP Albertus Airport	31 nm N	5,504 ft
KVYS Illinois Valley Regional Airport Walter A Duncan Field	33 nm SE	5,999 ft
KRFD Chicago Rockford International Airport	37 nm NE	10,002 ft
KMLI Quad City International Airport	41 nm SW	10,002 ft

04Jet A prices and FBOs at KSQI

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KSQI, 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 KSQI or read what a fuel stop actually saves.

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