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LOS Analyzer

Antenna tower · 2026

17438444 - SD01 STEWART SLOPE

LEAD, SD · near Black Hills-Clyde Ice Fld (10.8 mi)

Determination of no hazardDetermined - No Hazard300 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

"Updating frequencies only. Sponsor only owns existing antennas on existing structure. Please maintain current M/L config. Emissions will adhere to parameters set by collaboration between FAA and telecom companies as reflected in FAA 5G C-Band compatibility evaluation process. Questions angela.wilson@verizonwireless.com"

Filing details

Case number (ASN)
2026-AGL-5242-OE
Structure
17438444 - SD01 STEWART SLOPE
Type
Tower / antenna
Category
Antenna tower
Height above ground
300 ft
Height above sea level
7,318 ft
Site elevation
7,018 ft
Notice of
Alteration
Duration
Permanent
Marking & lighting
Dual-red and medium intensity

Timeline

Filed
April 1, 2026
Determined
June 9, 2026
Determination expires
—

Who filed it

Sponsor
* Cellco Partnership
Representative
Network Regulatory - C

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

See every 2026 filing by * Cellco Partnership →

Location

Coordinates
44.328778, -103.835639
Degrees / minutes / seconds
44°19'43.6"N 103°50'08.3"W
County
Lawrence

See every 2026 filing near Black Hills-Clyde Ice Fld →

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.