Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 657 ft MSL · USGS ground 619 ft · Δ 38 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 35 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 58 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
42 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
Obstruction within 0.5 nm on the FAA obstacle file
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
3XA6
AIX ID
aix:hp:BBC161AT
Lat / Lng
30.30440, -97.70773
Elevation
657 ft MSL
Pad dimensions
42 × 42 ft
Surface type
CONC
Activation date
2007/11
Last owner update
2021/03/30
FAA OEAAA airspace determinations3
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2007-05-04
NRAARCH-DeterminedASN 2007-ASW-426-NRA2007-06-27
Heliport · 0 ft AGL — Establish (existing) private-use hospital heliport. Two pads.
NRAARCH-DeterminedASN 2005-ASW-117-NRA2005-03-14
Heliport · 0 ft AGL — Proponent abandoned existing heliport determined by Aeronautical Study No. 2004-ASW-163-NRA due construction layout problems. Proposed heliport (42 ft. X 42 Ft.; concrete) will replace existing heliport. LOC ID: 007L is temporary for tracking purposes.
NRAARCH-DeterminedASN 2004-ASW-163-NRA2004-04-27
Other · 0 ft AGL — Construct private-use heliport (84 ft. diameter; concrete surface).
Blueprint
The record vs. what we measured
70/100
DATA INTEGRITY
eVTOL footprint
The 42 ft pad is 58 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation657 ft655 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions42 ft side (filed)42 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.
DELL CHILDREN'S MEDICAL CENTER, AUSTIN, TX (FAA 3XA6). AirIndex facility record aix:hp:BBC161AT. Verifiable at https://www.airindex.io/verify/aix:hp:BBC161AT.