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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 308 ft MSL · USGS ground 156 ft · Δ 152 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 135 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 45 feet of expansion
Recorded pad side 55 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 45 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
55 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
91MD
AIX ID
aix:hp:B9ETVCS2
Lat / Lng
38.90228, -76.84469
Elevation
308 ft MSL
Pad dimensions
55 × 55 ft
Surface type
CONC
Activation date
2021/05
FAA OEAAA airspace determinations3
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2021-05-11
NRAARCH-DeterminedASN 2021-AEA-1229-NRA2021-05-11
Heliport · 226 ft AGL — LAP ASN # 2021-ESA-68-LAP:This LAP was created in order to be able to generate a new NRA Case/Site ID with an associated new Temp ID 9152. Once the landing area is constructed it will be Submitted to NFDC. Note that this new NRA case will not actually be studied since the original case 2017-AEA-1520-NRA was studied resulting in a favorable Determination.
NRAARCH-DeterminedASN 2017-AEA-1520-NRA2017-07-17
Heliport · 226 ft AGL — One of two heliports being constructed on top of same building approximately 100 feet distance from center of each landing pad. Two separate cases being entered for separate study but the same 7480 form is being used with supporting documentation for both pads/cases. Refer to 2017-AEA-1521-NRA.
NRAARCH-DeterminedASN 2017-AEA-1521-NRA2017-07-17
Heliport · 226 ft AGL — One of two heliports being constructed on top of same building approximately 100 feet distance from center of each landing pad. Two separate cases being entered for separate study but the same 7480 form is being used with supporting documentation for both pads/cases. Refer to 2017-AEA-1520-NRA.
Blueprint
The record vs. what we measured
70/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 308 ft. USGS terrain plus the building put the actual rooftop at 291 ft — a -17 ft difference the federal record doesn’t carry.
eVTOL footprint
The 55 ft pad is 45 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation308 ft291 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions55 ft side (filed)55 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.
UM CAPITAL REGION MEDICAL CENTER, LARGO, MD (FAA 91MD). AirIndex facility record aix:hp:B9ETVCS2. Verifiable at https://www.airindex.io/verify/aix:hp:B9ETVCS2.