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LOS Analyzer

Construction equipment · 2026

Mobile Construction Equipment

Clear Lake, IA · near Mason City Muni (0.2 mi)

Returned to proponentDetermined - No Hazard75 ft AGL

What this outcome means

The FAA sent the case back to the filer rather than issuing a determination. This is the most common non-clean outcome and usually means something has to change or be supplied before the study can finish — not that the project was refused.

The proposal, in the filer's words

"Temporary Construction Points for the Rehabilitation of Runway 18/36 at the Mason City Municipal Airport. These points are for Phase 1 construction of the Runway 18/36 and Runway 12/30 Intersection which requires a temporary displacement to the Runway 36 Threshold. Point three indicates the location and surface elevation of the displaced threshold; 1 foot is the minimum structure height allowed by the software. The location of the temporary relocated threshold is submitted with this project as a case. Runway 18/36 will be open in the displaced Runway 36 threshold condition. Runway 36 will become a visual approach. Runway 12/30 will be closed during this Phase."

Filing details

Case number (ASN)
2026-ACE-1746-NRA
Structure
Mobile Construction Equipment
Type
Construction / vehicle
Category
Construction equipment
Height above ground
75 ft
Height above sea level
1,271 ft
Site elevation
1,196 ft
Notice of
New Construction
Duration
Temporary
Marking & lighting
—

Timeline

Filed
March 19, 2026
Determined
May 21, 2026
Determination expires
November 21, 2027

A determination that lapses before the structure is built has to be re-filed. The FAA does not send a reminder.

Who filed it

Sponsor
Mason City Municipal Airport
Representative
Foth Infrastructure and Environment

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

Location

Coordinates
43.155464, -93.327683
Degrees / minutes / seconds
43°09'19.7"N 93°19'39.7"W
County
Cerro Gordo

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.