Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 82 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 →
The recorded pad is 50 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
50 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.
Obstruction clearance
High obstacle within 0.5 nm — conflicts with the expanded footprint and 8:1 approach
Measured against FAA pad geometry and federal FATO sizing (EB-105). A dimensional pre-screen — site-level validation required, and independent of the underwriting risk score.
IBC references NFPA 418 for rooftop facilities. Standalone fire code reference not confirmed.
FAA facility data
FAA LID
9NC0
AIX ID
aix:hp:XD71DGAV
Lat / Lng
35.21207, -80.82363
Elevation
820 ft MSL
Pad dimensions
50 × 50 ft
Surface type
MATS
Activation date
2013/09
Last inspection
2012/01/19
Last owner update
2020/04/17
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2010-06-02
NRAARCH-DeterminedASN 2010-ASO-739-NRA2010-10-20
Heliport · 0 ft AGL — This study is for a private use rooftop helipad at Presbyterian Hospital Charlotte NC. VFR use only. FAA Form 7480-1 map and sketch attached. Documents emailed to CLT-FSDO (Lewis Sain) on June 2 2010.
Blueprint
The record vs. what we measured
81/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 820 ft. USGS terrain plus the building put the actual rooftop at 813 ft — a -7 ft difference the federal record doesn’t carry.
eVTOL footprint
The 50 ft pad is 50 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation820 ft813 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions50 ft side (filed)50 ft side · measured
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.