Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 4234 ft MSL · USGS ground 4237 ft · Δ -3 ft
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
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 →
This pad already covers the eVTOL landing footprint as it stands.
recorded pad eVTOL FATO
Recorded pad (limiting side)
150 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.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationON_FILE
OE/AAA ASN 2024-ANM-4339-NRA: DET-to-Prop
Q3 · State enforcementUNKNOWN
State enforcement posture not yet assessed.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
UT39
AIX ID
aix:hp:GRTY0H0W
Lat / Lng
40.86620, -111.92693
Elevation
4234 ft MSL
Pad dimensions
200 × 150 ft
Surface type
TURF
Surface condition
POOR
Activation date
1980/01
Last owner update
1980/09/22
FAA OEAAA airspace determinations2
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2026-06-03 · 2 in the last 24 months
NRAARCH-Work In ProgressASN 2026-ANM-1645-NRA
Form 7480 · 53 ft AGL — LAP ASN # 2026-WSA-128-LAP
NRAARCH-DeterminedASN 2024-ANM-4339-NRA2024-09-25
Form 7480 · 0 ft AGL — LAP ASN # 2024-WSA-195-LAP-Proponent requests a change in the flight traffic pattern to 1000 feet to reduce noise on recently built homes. BTF is located within 5 miles of SLC.
Safety history (NTSB)3
Fatal event history
3 NTSB helicopter events within 3 nm since 2010 (3 accidents, 1 fatal); most recent 2025-06-13.
ROBINSON HELICOPTER COMPANY R44 · Bountiful, UT — NTSB CAROL
ACCIDENT1.5 nm2012-07-16
ROBINSON HELICOPTER COMPANY R22 · Bountiful, UT — NTSB CAROL
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
79/100
DATA INTEGRITY
eVTOL footprint
Footprint assessment available.
SIGNALFEDERAL RECORDMEASURED
Surface elevation4234 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions150 ft side (filed)150 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.
A A HELICOPTERS INC, NORTH SALT LAKE, UT (FAA UT39). AirIndex facility record aix:hp:GRTY0H0W. Verifiable at https://www.airindex.io/verify/aix:hp:GRTY0H0W.