Mast 1333749 — Hainesville, IL

At 20 m, structure 1333749 is about 37% of the 53 m average across the 258 structures registered in Lake County. It is about 28% of the Illinois average of 69 m across 7,110 registrations. Among the 3,482 registrations nationwide filed under the same structure-type code (MAST), the average overall height is 53 m, so this one is about 37% of that figure.

The supporting structure itself measures 18 m; antennas and other appurtenances on top bring the overall height above ground to 20 m. The site's filed ground elevation is 240 m, which puts the top of the structure 259 m above mean sea level.

The registration places the structure near Hainesville in Lake County, Illinois, at coordinates 42.34475, -88.07228, with the site address filed as "I MP 42.6, MP_42.6 Belvidere Rd.". Lake County has 258 FCC-registered antenna structures, the 3rd-largest count among the 102 Illinois counties with registrations, and 171 of them are marked constructed. Illinois as a whole has 7,110 registrations, the 6th-largest total among the 50 states and DC.

The tallest other registered structure within about 40 km is Elk Grove Village, IL · 1007548, a tower at 229 m (constructed).

Constructed means the owner has notified the FCC that construction is complete, so the registry treats the structure as standing. The FCC issued registration 1333749 on Jun 5, 2026. Nationally, 141,895 of the 197,770 registrations (71.7%) carry the constructed status, including 5,177 in Illinois.

The FCC record lists NORTHEAST ILLINOIS REGIONAL COMMUTER RAILROAD CORP of Chicago, IL as the registered owner, under FCC Registration Number 0002849818. Across the registry it holds 13 structure registrations, including 13 in Illinois. Its most common filed structure-type code is MAST (9 registrations).

The registration cites FAA aeronautical study 2025-AGL-13461-OE, the FAA review of the structure's effect on air navigation. Its marking and lighting code, 1, is listed on the FCC registration form as "None".