Guyed tower 100604
Mason City, Iowa · Cerro Gordo County
Overview
The FCC lists structure 100604 about 8.4 km (5.2 mi) from Mason City, IA as a guyed tower. Overall height above ground is 245 m, or 803 ft.
The median guyed tower in Iowa is 94 m tall across 646 registrations, so this one sits 160% above the typical height for its type.
The structure is registered to Vertical Bridge S3 Assets, LLC, which holds 13 registrations across Iowa.
At 245 m, the radio horizon for an antenna at the top of this structure works out to roughly 65 km (40.1 mi). That is a geometric limit for flat, unobstructed terrain — real coverage depends on transmit power, frequency, terrain and what is in the way.
Three other registered structures sit within 3.1 km (1.9 mi), the nearest 1.9 km (1.2 mi) to the W.
The site lies 8.4 km (5.2 mi) outside Mason City, which is characteristic of structures placed for terrain and line of sight rather than proximity to population.
Location
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Registration record
as filed with the FCC| FCC registration | 100604 |
|---|---|
| Structure type | Guyed tower |
| Overall height (AGL) | 245 m (803 ft) |
| Height above sea level | 603 m (1,978 ft) |
| Constructed | 1994 |
| Date on record | 1 Jan 1994 |
| Coordinates | 43.16822, -93.10108 |
| County | Cerro Gordo County |
| Registered owner | Vertical Bridge S3 Assets, LLC |
| Owner type | Tower company |
How it compares
calculated from the full national dataset| Height rank in Iowa | 34th of 3,270 taller than 99.0% |
|---|---|
| Height rank in Mason City | 1st of 23 |
| Height rank in county | 1st of 45 |
| Median guyed tower in Iowa | 94 m (309 ft) +160% vs median |
| Radio horizon (estimate) | 65 km (40 mi) theoretical maximum, flat terrain |
| Other structures within 5 km | 5 |
Nearest registered structures
north is up| Distance | Bearing | Type | Height | ASR |
|---|---|---|---|---|
| 1.9 km (1.2 mi) | W | Lattice tower | 116 m (382 ft) | 101497 |
| 3.0 km (1.9 mi) | SSW | Tower | 124 m (407 ft) | 118243 |
| 3.1 km (1.9 mi) | WSW | Tower | 122 m (400 ft) | 119877 |
| 5.0 km (3.1 mi) | W | Lattice tower | 81 m (265 ft) | 2642531 |
| 5.0 km (3.1 mi) | WSW | Tower | 56 m (185 ft) | 2652238 |
About this record
A slender mast held upright by tensioned cables anchored around it. The cheapest way to go very tall, which is why most structures above 300 m are guyed.
This page summarises FCC ASR record 100604, from the weekly file dated 2026-08-23. Rankings and comparisons on this page are calculated by Pylon Plans from the full national dataset, not supplied by the FCC.
"Owner" is the entity that registered the structure, usually a tower company such as American Tower or Crown Castle. It does not indicate which carriers operate equipment on the structure.