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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 145 ft MSL · USGS ground 90 ft · Δ 55 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 39 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 60 feet of expansion
Recorded pad side 40 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 60 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
40 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
CA14
AIX ID
aix:hp:XYVAX610
Lat / Lng
37.66546, -120.99751
Elevation
145 ft MSL
Pad dimensions
40 × 40 ft
Surface type
CONC
Activation date
2020/12
Last owner update
2026/04/17
FAA OEAAA airspace determinations4
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2020-02-04
NRAARCH-DeterminedASN 2020-AWP-775-NRA2020-12-17
Form 7480 · 1 ft AGL — LAP ASN # 2020-WSA-12-LAP
NRAARCH-DeterminedASN 2010-AWP-1565-NRA2010-11-19
Heliport · 0 ft AGL — Alteration of DMC Helipad. Reduce Heliport FATO and TLOF dimensions. Proposed FATO: 65'x65'\r\nTLOF: 40'x40'\r\nIngress/Egress: 160/250 App. 250/340 Departure on a Roof top surface.
NRAARCH-DeterminedASN 2008-AWP-228-NRA2008-08-07
Heliport · 0 ft AGL — Doctors Medical Center Heliport. Existing rooftop heliport that has been in operation since 1992. Heliport Permit No. Sta-002(H). (Latest Caltrans permit is dated July 3 2001.)
NRAARCH-DeterminedASN 2006-AWP-125-NRA2006-11-24
Heliport · 0 ft AGL — Proponet requests activiation of existing site; form 5010 was never submitted.\r\nPrior case No. 79-AWE-312-NRA May 8 1980\r\n65' x 65' TLOF ADO will send file copy of prior FAA determination.
Blueprint
The record vs. what we measured
70/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 145 ft. USGS terrain plus the building put the actual rooftop at 129 ft — a -16 ft difference the federal record doesn’t carry.
eVTOL footprint
The 40 ft pad is 60 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation145 ft129 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions40 ft side (filed)40 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.
DOCTORS MEDICAL CENTER, MODESTO, CA (FAA CA14). AirIndex facility record aix:hp:XYVAX610. Verifiable at https://www.airindex.io/verify/aix:hp:XYVAX610.