wxdecoder
81LL

Otterbach Farm Airport

Mendota, IllinoisElevation 840 ftSmall airport

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RUNWAYS

Runway detail & declared distances

1 runway · longest 1,600 ft

NW/SE
Dimensions
1,600 x 70 ft
Surface
Turf
RWY NW
RWY SE

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

AIRPORT INFORMATION

Facility & services

Otterbach Farm Airport is in Mendota, Illinois. Field elevation 840 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerDEAN L. OTTERBACH
Manager phone773-538-7102
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA81LL
SectionalCHICAGO
Center (ARTCC)CHICAGO
Flight service (AFSS)KANKAKEE
RegionIllinois
CountryUnited States
Coordinates41.5723, -89.1714
Distance from city2 NM NW
SERVICES & LIGHTING
Control towerNon-towered
AIRPORT REMARKS

Operational remarks

›OWNER DESIRES ARPT NOT BE CHARTED.
›E111:PROVIDED ALL TRAFFIC PATTERN OPERATIONS ARE CONDUCTED NORTH OF THE RWY.
›KEN OTTERBACK 35461 N 2900TH RD MENDOTA, IL 61342 (815) 538-7102
›FOR CD CTC CHICAGO ARTCC AT 630-906-8921.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗81LL on OurAirports
FREQUENTLY ASKED
Does 81LL have a METAR?
No on-field METAR is issued for 81LL. This page uses the nearest reporting station as a reference.
Does 81LL have a TAF?
No TAF is issued directly for 81LL. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 81LL?
81LL sits at 840 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 81LL?
No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.
This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.