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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 397 ft MSL · USGS ground 357 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
CONDITIONALConversion feasibility · four readings, one line each
Obstruction screen
Clear
No obstructions within 0.5 nm on the FAA obstacle file.
Geometry
Requires 58 feet of expansion
Recorded pad side 42 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
Conditional
Obstruction screen passed. Geometry and structural capacity remain open. Site validation required.
The recorded pad is 58 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
42 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.
Observed eVTOL activity is arriving around a pad that cannot take it: 44 observed flights in the last 30 days at 2 endpoints within 15 nm (nearest KCVH, 4 nm), while this hospital pad holds an airspace determination and records a 42 ft pad, under the 50 ft eVTOL FATO floor.
Situations are rules-based inferences across the obstruction, observed-operations and record layers, re-evaluated nightly; each carries its evidence and closes when the condition no longer holds.
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2008-03-06
NRAARCH-DeterminedASN 2008-AWP-166-NRA2008-07-08
Heliport · 20 ft AGL — Establishmnet/Activation
Blueprint
The record vs. what we measured
64/100
DATA INTEGRITY
eVTOL footprint
The 42 ft pad is 58 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation397 ft397 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions42 ft side (filed)42 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.
HAZEL HAWKINS MEML HOSPITAL, HOLLISTER, CA (FAA 9CN1). AirIndex facility record aix:hp:22WEE3T8. Verifiable at https://www.airindex.io/verify/aix:hp:22WEE3T8.