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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 84 ft MSL · USGS ground 94 ft · Δ -10 ft
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
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
INFEASIBLE WITHOUT REMEDIATIONConversion feasibility · four readings, one line each
Obstruction screen
Severe
High obstacle within 0.5 nm conflicts with the expanded footprint and the 8:1 approach surface.
Geometry
Requires 52 feet of expansion
Recorded pad side 48 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
Infeasible without remediation
A high obstacle conflicts with the expanded footprint. Remediation or a different site.
The recorded pad is 52 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
48 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.
Heliport · 0 ft AGL — LAP ASN # 2017-WSA-12-LAP\r\n\r\nRooftop Helideck designed under AC 150/5390-2B to accommodate Huey sized aircraft. Hospital Building currently under construction. Construction scheduled for completion for 2017.
NRAARCH-DeterminedASN 2014-AWP-401-NRA2014-11-14
Other · 0 ft AGL — Deactivation of heliport.
NRAARCH-DeterminedASN 2014-AWP-398-NRA2014-11-14
Heliport · 153 ft AGL — Construction of Heliport. Proposed metal rooftop helipad. FATO is 86 ft x 86 ft TLOF is 48 ft x 48 ft. Magnetic directions of ingress are 125 degrees and 345 degress. Magnetic directions of egress are 305 degrees and 165 degress.
NRAARCH-DeterminedASN 2012-AWP-1660-NRA2012-11-16
Other · 0 ft AGL — Activation of Temporary Helistop at Stanford University Medical Center in Palo Alto CA.\r\n\r\nTemporary surface is metal FATO is 76'x76' TLOF is 42'x42' magnetic direction of ingress is 306 degrees and magnetic direction of egress is 126 degrees.
Blueprint
The record vs. what we measured
67/100
DATA INTEGRITY
eVTOL footprint
The 48 ft pad is 52 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation84 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions48 ft side (filed)48 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.
STANFORD HEALTH CARE EAST, PALO ALTO, CA (FAA 15CA). AirIndex facility record aix:hp:DVW4HDGH. Verifiable at https://www.airindex.io/verify/aix:hp:DVW4HDGH.