Owner self-reported — never independently field-inspected
Location confidence
⚠ Location-suspect — recorded coordinates may be mislocated
Terrain cross-check (USGS 3DEP)
FAA 271 ft MSL · USGS ground 171 ft · Δ 100 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
Cross-source consensus
⚠ Sources conflict — FAA elevation sits above terrain, but no building is at the coordinate
Either a freestanding / tower pad or a mislocated coordinate — independent verification recommended.
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 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.
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.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationON_FILE
OE/AAA ASN 2024-AEA-40-NRA: DET-to-Prop
Q3 · State enforcementMODERATE
State has partial enforcement framework.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
5DC3
AIX ID
aix:hp:ZTAAYXFX
Lat / Lng
38.85111, -76.99500
Elevation
271 ft MSL
Pad dimensions
55 × 55 ft
Surface type
ROOF-TOP
Activation date
2025/04
FAA OEAAA airspace determinations3
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2024-01-05
NRAARCH-DeterminedASN 2024-AEA-40-NRA2024-03-20
Form 7480 · 101 ft AGL — LAP ASN # 2024-ESA-4-LAP; Activate a new Elevated Helipad.
NRAARCH-DeterminedASN 2022-AEA-1300-NRA2022-04-21
Heliport · 85 ft AGL — LAP ASN # 2022-ESA-55-LAP; Establish a new Private Hospital Helipad.
NRAARCH-DeterminedASN 2018-AEA-1771-NRA2019-03-05
Heliport · 0 ft AGL — Establish/Construct a private-use helipad.
Safety history (NTSB)1
Fatal event history
1 NTSB helicopter event within 3 nm since 2010 (1 accident, 1 fatal); most recent 2025-01-30.
NTSB helicopter accidents & incidents geocoded within 3 nm of this pad and attributed to the nearest facility — proximity, not a determination that an event occurred at this site. Source: NTSB aviation accident database.
Blueprint
The record vs. what we measured
72/100
DATA INTEGRITY
eVTOL footprint
The 55 ft pad is 45 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation271 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions55 ft side (filed)55 ft side · measured
Coordinate integrityas filed⚠ location-suspect
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.
CEDAR HILL RGNL MEDICAL CENTER, WASHINGTON, DC (FAA 5DC3). AirIndex facility record aix:hp:ZTAAYXFX. Verifiable at https://www.airindex.io/verify/aix:hp:ZTAAYXFX.