Otterbach Farm Airport

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Location

Latitude: 
 41-34-09.1180N (41.569199)
Longitude: 
 089-10-25.3130W (-89.173698)
Elevation: 
 840.0 feet MSL (256 m MSL)
Magnetic Variation: 
 3 W (as of December 2025 from WMM2020 model)
Time Zone: 
 UTC -6.0 (Standard Time)
UTC -5.0 (Daylight Savings Time)
From City: 
 02 N.M. NW of Mendota, Illinois
Found On: 
 Chicago Chart
FAA Region: 
 AGL

Contacts

Manager: 
Privately owned: 
DEAN L. OTTERBACH
RR 1
MENDOTA, IL 61342
815-538-7102		 DEAN L. OTTERBACH
RR 1
MENDOTA, IL 61342
815-538-7102

Operations

Airport Status: 
 Operational
Facility Use: 
 Private
Type: 
 Airport
Activation Date: 
 05/1979
Control tower: 
 No
Attendance (Months/Days/Hours): 
 Months/Days/Hours
Unattended
Boundary ARTCC: 
 ZAU (Chicago)
Responsible ARTCC: 
 ZAU (Chicago)
Segmented Circle Indicator: 
 No
Traffic Pattern Altitude (MSL): 
 1840 feet (561 m)
NOTAM-D Service: 
 No

Based Aircraft

Annual Operations (as of )

Communications

       

    Fixed Based Operators (FBOs) & Fuel

    (Click on a business for detail)
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    Area Code: 815
    Business Name Frequency Phone Fuel Grade
    To add, modify, or delete a business
    .

    Flight Service Stations

    Primary Alternate
    FSS on Field:  N
    FSS Name (ID):  Kankakee(IKK)
    Frequency: 
    Toll Free Phone:  1-800-WX-BRIEF

    Instrument Procedures / Charts

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    Navigation Aids (Navaids) near 81LL

    Navigational Aid (NAVAID) distances from the airport are listed in Nautical Miles (NM).

    Nearby Airports with Fuel

    Dist (NM) Name (Airport IDs) True Hdg Mag Hdg Fuel Grade
    12.0 Bresson Airport
    (C82)    		 15 18 100LL
    13.2 Illinois Valley Regional-Walter A Duncan Field Airport
    (VYS KVYS VYS)    		 175 178 100LL, Jet A+
    19.9 Rochelle Municipal/Koritz Field Airport
    (KRPJ RPJ)    		 12 15 100LL, Jet A
    19.9 Skydive Chicago Airport
    (8N2)    		 120 123 100LL, Jet A
    20.0 Dixon Municipal-Charles R Walgreen Field Airport
    (C73)    		 322 325 100LL
    24.3 Hinckley Airport
    (0C2)    		 59 62 80
    24.8 Whiteside County/Jos H Bittorf Field Airport
    (KSQI SQI)    		 294 297 100LL, Jet A
    25.7 Cushing Field Ltd Airport
    (0C8)    		 96 99 100LL, Mogas
    30.3 De Kalb Taylor Municipal Airport
    (KDKB DKB)    		 43 46 100LL, Jet A-1+
    33.6 Aurora Municipal Airport
    (AUZ KARR ARR)    		 68 72 100, Jet A-1
    34.4 Marshall County Airport
    (C75)    		 196 199 100LL, UL94
    35.0 Morris Municipal/James R Washburn Field Airport
    (C09)    		 104 108 100LL, Jet A, Jet A+
    37.7 Chicago/Rockford International Airport
    (RFD KRFD RFD)    		 5 8 100LL, Jet A, Jet A-1+
    41.7 Kewanee Municipal Airport
    (KEZI EZI)    		 238 240 100LL
    42.2 Dwight Airport
    (KDTG DTG)    		 128 132 100LL
    44.5 Albertus Airport
    (FEP KFEP FEP)    		 335 338 100LL, Jet A
    44.9 Joliet Regional Airport
    (JOT KJOT JOT)    		 93 97 100LL, Jet A, MOGAS
    46.0 Pontiac Municipal Airport
    (KPNT PNT)    		 147 150 100LL, Jet A
    46.1 Dupage Airport
    (DPA KDPA DPA)    		 63 67 100LL, Jet A
    47.4 Bolingbrook's Clow International Airport
    (1C5)    		 80 84 100LL, Jet A

    Notices to Airmen (NOTAMS)

    NOTAMs

    List ALL 81LL NOTAMs
    View 81LL NOTAMs

    NOTAM Radius Search

    NOTAMS within

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    This field is required
    NM of 81LL

    NOTAM Flight Path Search (Enter from two to five locations below)

    NOTAMS within

    Enter NOTAM radius search distance

    This field is required
    NM of 81LL

    Remarks

    A110-1 OWNER DESIRES ARPT NOT BE CHARTED.
    A110-2 FOR CD CTC CHICAGO ARTCC AT 630-906-8921.
    A14 KEN OTTERBACK 35461 N 2900TH RD MENDOTA, IL 61342 (815) 538-7102
    E111 E111:PROVIDED ALL TRAFFIC PATTERN OPERATIONS ARE CONDUCTED NORTH OF THE RWY.

    Runways

    Runway Summary

    Runways: NW/SE
    Longest Runway: NW/SE is 1600 ft (488 m) long
    Runways with an Instrument Approach:

    81LL Airport Runway Details

    Runway NW/SE  1600 ft x 70 ft (488 m x 21 m)
    Surface:  Turf - No special surface treatment

    Runway NW

    Runway SE
    Glide Path Angle: 
    		 0.0 degrees 0.0 degrees

    Services

    Airframe Repair: 
    		 Major
    Powerplant Repair: 
    		 Major
    Bottled Oxygen: 
    		 None
    Bulk Oxygen: 
    		 None
    Fuel Available: 
    		 100LL, Jet A
    Landing Fees: 
    		 No
    Parking: 
    		 Hangars and tiedowns available

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    Maps & Diagrams

    81LL Sectional

    Flight Planning
    at skyvector.com

    81LL Diagram


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