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81LL Otterbach Farm Airport
Mendota, Illinois, USA

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FAA INFORMATION EFFECTIVE 16 APRIL 2026

Location

FAA Identifier: 81LL
Lat/Long: 41-34-09.1180N 089-10-25.3130W
41-34.151967N 089-10.421883W
41.5691994,-89.1736981
(estimated)
Elevation: 840 ft. / 256 m (estimated)
Variation: 00E (1985)
From city: 2 miles NW of MENDOTA, IL
Time zone: UTC -5 (UTC -6 during Standard Time)
Zip code: 61342

Airport Operations

Airport use: Private use. Permission required prior to landing
Activation date: 05/1979
Control tower: no
ARTCC: CHICAGO CENTER
FSS: KANKAKEE FLIGHT SERVICE STATION
Attendance: UNATNDD
Segmented circle: no

Airport Communications

WX AWOS-3 at VYS (13 nm S): 120.025 (815-223-8442)
WX AWOS-3 at RPJ (20 nm N): 125.2 (815-562-2955)

Nearby radio navigation aids

VOR radial/distance  VOR name  Freq  Var
JOTr270/38.4JOLIET VOR/DME112.3002E

Airport Services

Runway Information

Runway NW/SE

Dimensions: 1600 x 70 ft. / 488 x 21 m
Surface: turf
RUNWAY NW  RUNWAY SE
Traffic pattern: leftleft

Airport Ownership and Management from official FAA records

Ownership: Privately-owned
Owner: DEAN L. OTTERBACH
35461 2900 NORTH AVE
MENDOTA, IL 61342
Phone 815-538-7102
Manager: DEAN L. OTTERBACH
35461 2900 NORTH AVE
MENDOTA, IL 61342
Phone 773-538-7102
KEN OTTERBACK 35461 N 2900TH RD MENDOTA, IL 61342 (815) 538-7102

Additional Remarks

- OWNER DESIRES ARPT NOT BE CHARTED.
- FOR CD CTC CHICAGO ARTCC AT 630-906-8921.

Instrument Procedures

There are no published instrument procedures at 81LL.

Some nearby airports with instrument procedures:

KVYS - Illinois Valley Regional Airport-Walter A Duncan Field (13 nm S)
KRPJ - Rochelle Municipal Airport/Koritz Field (20 nm N)
C73 - Dixon Municipal Airport-Charles R. Walgreen Field (20 nm NW)
KSQI - Whiteside County Airport/Jos H Bittorf Field (25 nm NW)
KDKB - De Kalb Taylor Municipal Airport (30 nm NE)
  
Loc | Ops | Rwys | IFR | FBO | Links
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Area around 81LL (Otterbach Farm Airport)
 
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Aerial photo
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Sectional chart

 
Airport distance calculator
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From to 81LL

Sunrise and sunset
Times for 27-Apr-2026
 Local
(UTC-5)		 Zulu
(UTC)
Morning civil twilight05:3010:30
Sunrise06:0011:00
Sunset19:4900:49
Evening civil twilight20:1901:19

Current date and time
Zulu (UTC)  27-Apr-2026 19:59:31
Local (UTC-5)  27-Apr-2026 14:59:31
 
METAR
KVYS 
13nm S 		271939Z AUTO 15019G23KT 10SM CLR 20/15 A2956 RMK AO2
KRPJ 
19nm N 		271935Z AUTO 14022G27KT 10SM CLR 17/15 A2955 RMK AO2 T01740145
KSQI 
25nm NW 		271856Z AUTO 15011G22KT 120V190 10SM CLR 19/16 A2955 RMK AO2 PK WND 15027/1844 SLP004 T01890161 $
TAF
KRFD 
38nm N 		271736Z 2718/2818 15020G30KT P6SM SCT030 BKN100 TEMPO 2718/2720 14025G40KT FM272200 17020G30KT P6SM -SHRA BKN035 PROB30 2722/2801 3SM -TSRA BR BKN015 OVC035CB FM280200 23014G24KT P6SM SCT020 BKN035 FM280500 27012G22KT P6SM SCT015 BKN020
KDPA 
46nm NE 		271736Z 2718/2818 16022G32KT P6SM SCT030 BKN100 TEMPO 2718/2721 14025G40KT FM272300 18020G30KT 6SM -SHRA BKN035 TEMPO 2723/2801 3SM -TSRA BR BKN015 OVC035CB FM280300 23014G24KT P6SM SCT020 BKN035 FM280600 26012G22KT P6SM SCT015 BKN020
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