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IL38 J Maddock Airport
Big Rock, Illinois, USA

GOING TO BIG ROCK?

FAA INFORMATION EFFECTIVE 11 JUNE 2026

Location

FAA Identifier: IL38
Lat/Long: 41-46-01.1040N 088-31-55.2780W
41-46.018400N 088-31.921300W
41.7669733,-88.5320217
(estimated)
Elevation: 705 ft. / 215 m (estimated)
Variation: 00W (1985)
From city: 1 mile SE of BIG ROCK, IL
(3 NM 260 DEG FROM AURORA MUNI ARPT.)
Time zone: UTC -5 (UTC -6 during Standard Time)
Zip code: 60511

Airport Operations

Airport use: Private use. Permission required prior to landing
Activation date: 03/1973
Control tower: no
ARTCC: CHICAGO CENTER
FSS: KANKAKEE FLIGHT SERVICE STATION
Attendance: UNATNDD
Wind indicator: yes
Segmented circle: no

Airport Communications

WX ASOS at ARR (2.5 nm E): PHONE 630-466-5649
WX AWOS-3 at DKB (13 nm NW): 119.075 (815-748-2350)
WX ASOS at DPA (15 nm NE): PHONE 630-587-3668

Nearby radio navigation aids

VOR radial/distance  VOR name  Freq  Var
DPAr226/11.0DUPAGE VOR/DME114.5502E
JOTr322/16.3JOLIET VOR/DME112.3002E
OBKr226/37.6NORTHBROOK VOR/DME113.0002W

Airport Services

Runway Information

Runway E/W

Dimensions: 2600 x 70 ft. / 792 x 21 m
Surface: turf, in good condition
RUNWAY E  RUNWAY W
Traffic pattern: leftright

Airport Ownership and Management from official FAA records

Ownership: Privately-owned
Owner: JAY B. MADDOCK
PO BOX 585
SUGAR GROVE, IL 60554-0232
Phone 630-466-7523
Manager: JAY B. MADDOCK
PO BOX 585
SUGAR GROVE, IL 60554-0232
Phone 630-466-7523

Additional Remarks

- FOR CD CTC CHICAGO APCH AT 847-289-0926.

Instrument Procedures

There are no published instrument procedures at IL38.

Some nearby airports with instrument procedures:

KARR - Aurora Municipal Airport (3 nm E)
KDKB - De Kalb Taylor Municipal Airport (13 nm NW)
KDPA - DuPage Airport (15 nm NE)
1C5 - Bolingbrook's Clow International Airport (19 nm E)
C09 - Morris Municipal Airport/James R Washburn Field (21 nm S)
  
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Area around IL38 (J Maddock Airport)
 
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Airport distance calculator
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From to IL38

Sunrise and sunset
Times for 23-Jun-2026
 Local
(UTC-5)		 Zulu
(UTC)
Morning civil twilight04:4709:47
Sunrise05:2110:21
Sunset20:3201:32
Evening civil twilight21:0602:06

Current date and time
Zulu (UTC)  23-Jun-2026 21:33:58
Local (UTC-5)  23-Jun-2026 16:33:58
 
METAR
KARR 
2nm E 		232052Z 34005KT 10SM FEW055 SCT080 24/12 A3017 RMK AO2 SLP214 T02440122 58013
KDKB 
12nm NW 		232115Z AUTO 00000KT 10SM SCT055 SCT080 25/13 A3018 RMK AO2 T02450129
KDPA 
15nm NE 		232052Z 10003KT 10SM BKN055 BKN080 23/12 A3017 RMK AO2 SLP214 T02330122 58013 $
TAF
KDPA 
15nm NE 		231720Z 2318/2418 06008KT P6SM FEW050 SCT250 FM240100 VRB03KT P6SM FEW050 BKN250 FM241000 20008KT P6SM SCT050 BKN250 FM241500 22011G17KT P6SM VCSH BKN050
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