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LOS Analyzer

Antenna tower · 2026

Lemanski (310619)

Cottage Grove, WI · near Blackhawk Airfield (6.9 mi)

Determination of no hazardDetermined - No Hazard181 ft AGL

What this outcome means

The FAA studied the proposal and concluded it would not be a hazard to air navigation. A no-hazard determination is not permanent — it carries an expiration date, and if the structure is not built by then the case has to be re-filed.

The proposal, in the filer's words

"Correct AGL /Adding frequencies to existing structure. 5G C-Band transmissions from this site will comply with the operational parameters agreed to in collaboration with the FAA as part of its 5G C-band compatibility evaluation process as they may evolve over time."

Filing details

Case number (ASN)
2026-AGL-2677-OE
Structure
Lemanski (310619)
Type
Tower / antenna
Category
Antenna tower
Height above ground
181 ft
Height above sea level
1,179 ft
Site elevation
998 ft
Notice of
Existing
Duration
Permanent
Marking & lighting
—

Timeline

Filed
February 6, 2026
Determined
February 10, 2026
Determination expires
—

Who filed it

Sponsor
American Tower Corp.
Representative
FAA FCC

Names are shown as they appear in the FAA's public record. How we handle names

Location

Coordinates
43.005222, -89.177528
Degrees / minutes / seconds
43°00'18.8"N 89°10'39.1"W
County
Dane

Other filings within 5 miles

Organisation-sponsored 2026 filings whose coordinates sit near this one.

About this record

This page is a readable copy of a public record published by the FAA's Obstruction Evaluation / Airport Airspace Analysis system. It is not the official record and may lag it. For the authoritative case status, search this ASN at the FAA's OE/AAA portal. If something here is wrong, email support@idea-engine.studio and we will correct it.

Source: FAA Obstruction Evaluation / Airport Airspace Analysis (OE/AAA) public archive (oeaaa.faa.gov), data as of September 12, 2026. Compiled by LOS Analyzer (Idea Engine LLC). This is not an official FAA record or an FAA determination; the FAA's portal is authoritative. LOS Analyzer is not affiliated with or endorsed by the FAA.

Screening a structure of your own?

Check Part 77 and the tower's line of sight before you file

LOS Analyzer screens a proposed structure against FAA Part 77 surfaces and the control tower's sightline to the runway, terrain-aware, in minutes. It is a preliminary screening — not an FAA determination and not a substitute for a licensed engineering review.