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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 1020 ft MSL · USGS ground 876 ft · Δ 144 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 ≈ 144 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
Meets the FATO footprint
Recorded pad side 100 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.
This pad already covers the eVTOL landing footprint as it stands.
recorded pad eVTOL FATO
Recorded pad (limiting side)
100 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.
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
WS27
AIX ID
aix:hp:H9YF6SXY
Lat / Lng
43.07617, -89.43171
Elevation
1020 ft MSL
Pad dimensions
100 × 100 ft
Surface type
CONC
Activation date
1986/06
Last owner update
2025/07/29
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2004-03-15
NRAARCH-DeterminedASN 2004-AGL-290-NRA2004-06-14
Other · 1 ft AGL — UW Hospital Heliport Relocation. MSP-ADO has no objection to proposal.
Blueprint
The record vs. what we measured
64/100
DATA INTEGRITY
eVTOL footprint
Footprint assessment available.
SIGNALFEDERAL RECORDMEASURED
Surface elevation1020 ft1020 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions100 ft side (filed)100 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.