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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 639 ft MSL · USGS ground 615 ft · Δ 24 ft
Structure cross-check (Overture / OSM)
On a building footprint — height not tagged in the source
Building height ≈ 14 ft — measured independently of the FAA record
Cross-source consensus
Single independent source — no corroboration available
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 57 feet of expansion
Recorded pad side 43 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 57 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
43 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.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationON_FILE
OE/AAA ASN 2024-AWP-5705-NRA: DET-to-Prop
Q3 · State enforcementSTRONG
State has adopted FAA AC as enforceable.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
39CN
AIX ID
aix:hp:GAR4Y0T3
Lat / Lng
39.15303, -123.20215
Elevation
639 ft MSL
Pad dimensions
43 × 43 ft
Surface type
DECK
Activation date
2010/03
Last owner update
2023/11/28
FAA OEAAA airspace determinations5
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2024-06-14
NRAARCH-DeterminedASN 2024-AWP-5705-NRA2024-07-15
Form 7480 · 30 ft AGL — LAP ASN # 2024-WSA-133-LAP-Update pad coordinates as well as elevation in preparation for Instrument Flight Procedures. Previous case was determined in \r\n2015-AWP-106-NRA
NRAARCH-DeterminedASN 2015-AWP-106-NRA2015-03-30
Heliport · 26 ft AGL — Establish a new helistop on the rooftop of the expanded hospital facility at Ukiah Valley Medical Center. Surface type is aluminum. TLOF is 43 feet in diameter FATO is 71 feet in diameter. Routes of ingress/egress are 332 and 17 degrees.
NRAARCH-DeterminedASN 2012-AWP-600-NRA2012-08-31
Other · 16 ft AGL — Relocate ground based helipad to rooftop of new one story emergency department addition.\r\n\r\nSurface is concrete FATO is 98' x 98' TLOF is 54' x 54' and magnetic direction of ingress is 335 degrees egress is 290 degrees.
NRAARCH-DeterminedASN 2012-AWP-734-NRA2012-08-31
Heliport · 0 ft AGL — Establishment of a temporary heliport. To be used for approximately 2 years while new hospital building is constructed. Proposed heliport is concrete FATO is 75 feet TLOF is 40 feet magnetic direction of ingress is 251.2 degrees and magnetic direction of egress is 71.2 degrees. Lighting is 8 green marking TLOF 5 yellow landing direction lights.
NRAARCH-DeterminedASN 2009-AWP-420-NRA2010-01-08
Heliport · 0 ft AGL — ESTABLISHMENT - Ukiah Valley Medical Center Heliport. Heliport exists but 5010-1 not in FAA Database.
Blueprint
The record vs. what we measured
76/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 639 ft. USGS terrain plus the building put the actual rooftop at 628 ft — a -11 ft difference the federal record doesn’t carry.
eVTOL footprint
The 43 ft pad is 57 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation639 ft628 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions43 ft side (filed)43 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.
ADVENTIST HEALTH UKIAH VALLEY, UKIAH, CA (FAA 39CN). AirIndex facility record aix:hp:GAR4Y0T3. Verifiable at https://www.airindex.io/verify/aix:hp:GAR4Y0T3.