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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 836.3 ft MSL · USGS ground 796 ft · Δ 40 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
On a building footprint — height not tagged in the source
Building height ≈ 40 ft — measured independently of the FAA record
Cross-source consensus
Corroborated — terrain and structure agree (2/2 sources)
Cross-checked against independent public data — USGS 3DEP terrain, Overture/OSM building footprints, the federal hospital registry, and measured dimensions. The State of the U.S. Heliport Record →
eVTOL readiness
UNVERIFIEDConversion feasibility · four readings, one line each
Obstruction screen
No data
No FAA obstacle data on file for this state. Clearance unverified.
Geometry
Requires 54 feet of expansion
Recorded pad side 46 ft against a 100 ft eVTOL FATO.
Structural FATO
Unverified
The full 100 × 100 ft FATO must be load-bearing. The FAA does not record structural capacity, so no record can confirm it.
Overall
Unverified
No obstruction data on file. The dimensional gap applies; clearance is unverified.
The recorded pad is 54 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
46 ft
eVTOL FATO required
100 ft
FAA EB-105 vertiport pattern — 2× a ~50 ft eVTOL controlling dimension, plus a 125 ft safety-area side.
Load-bearing FATO
100 × 100 ft must be structural
No heliport precedent — typically the binding gate for rooftop and hospital pads.
Measured against FAA pad geometry and federal FATO sizing (EB-105). The obstruction screen is the only reading the engine verdict rests on; geometry and structural capacity are stated separately and never folded into it. A dimensional pre-screen — site-level validation required, and independent of the underwriting risk score.
Form 7480 · 35 ft AGL — LAP ASN # 2023-CSA-186-LAP\r\nPEP submittal correcting location of H1.
NRAARCH-DeterminedASN 2011-AGL-5315-NRA2012-11-16
Heliport · 0 ft AGL — Establish a privately-owned private use back-up hospital helipad (H3)in parking lot to be used when rooftop pad is not available. TLOF 64' x 64'. FATO 100' 100'. This is a third helipad related to the Luther Midelfort Hospital (WS38).
NRAARCH-DeterminedASN 2008-AGL-459-NRA2011-02-12
Heliport · 0 ft AGL — Construct roof-top helipad with 46' x 46' TLOF. This helipad will be in addition to existing ground level helipad.
Blueprint
The record vs. what we measured
76/100
DATA INTEGRITY
eVTOL footprint
The 46 ft pad is 54 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation836.3 ft836 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions46 ft side (filed)46 ft side · measured
Coordinate integrityas filedterrain cross-checked
Independent inspectionowner self-reportednone on record
✓Federal record
→
✓Cross-checkedUSGS · Overture · dimensions
→
3Physically verifiedGround Truth capture
Obstructions, exact FATO geometry, surface condition, and downwash exposure require a physical Ground Truth capture — not shown above as measured. A field verification completes the record and writes the measured truth to this facility’s authority.
This page is the public data-integrity record. The full RiskIndex assessment — Q1–Q5 compliance, dimensional / FATO analysis, an underwriting-grade risk score, peer benchmark, and a sealed Site Intelligence Report — is available on request.
MAYO CLINIC HEALTH SYSTEM/EAU CLAIRE, EAU CLAIRE, WI (FAA WS38). AirIndex facility record aix:hp:SE3WNER7. Verifiable at https://www.airindex.io/verify/aix:hp:SE3WNER7.