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81LL Otterbach Farm Airport
Mendota, Illinois, USA

GOING TO MENDOTA?

FAA INFORMATION EFFECTIVE 11 JUNE 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)
  
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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 24-Jun-2026
 Local
(UTC-5)		 Zulu
(UTC)
Morning civil twilight04:5009:50
Sunrise05:2410:24
Sunset20:3401:34
Evening civil twilight21:0802:08

Current date and time
Zulu (UTC)  25-Jun-2026 04:36:07
Local (UTC-5)  24-Jun-2026 23:36:07
 
METAR
KVYS 
13nm S 		250403Z AUTO 18003KT 10SM SCT017 SCT021 BKN060 19/18 A2995 RMK AO2
KRPJ 
19nm N 		250415Z AUTO 17003KT 10SM BKN055 BKN070 BKN080 18/17 A2994 RMK AO2 T01760167
KSQI 
25nm NW 		250356Z AUTO 13004KT 10SM CLR 19/18 A2994 RMK AO2 SLP135 T01890183 $
TAF
KRFD 
38nm N 		250234Z 2503/2524 16004KT P6SM SCT040 BKN080 FM250500 24003KT P6SM FEW050 SCT150 FM251300 30009KT P6SM SCT050 BKN150
KDPA 
46nm NE 		250228Z 2502/2524 12008KT P6SM -SHRA SCT035 BKN060 OVC100 TEMPO 2502/2503 3SM -TSRA BKN035CB FM250430 15005KT P6SM SCT050 BKN100 FM250530 22005KT P6SM SCT050 BKN150 FM251300 28010KT P6SM SCT050
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