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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 4830 ft MSL · USGS ground 4655 ft · Δ 175 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
On a building footprint — height not tagged in the source
Building height ≈ 175 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
INFEASIBLE WITHOUT REMEDIATIONConversion feasibility · four readings, one line each
Obstruction screen
Severe
High obstacle within 0.5 nm conflicts with the expanded footprint and the 8:1 approach surface.
Geometry
Requires 54 feet of expansion
Recorded pad side 46 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
Infeasible without remediation
A high obstacle conflicts with the expanded footprint. Remediation or a different site.
The recorded pad is 54 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
46 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
29CO
AIX ID
aix:hp:WG9CHEFX
Lat / Lng
39.08987, -108.56278
Elevation
4830 ft MSL
Pad dimensions
46 × 46 ft
Surface type
MATS
Activation date
1980/10
Last owner update
2020/03/13
FAA OEAAA airspace determinations4
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2013-10-03
NRAARCH-DeterminedASN 2013-ANM-1171-NRA2013-11-27
Heliport · 0 ft AGL — Existing hospital helipad. Hospital moved their helipad a few years back and did not file for new review. Helipad was moved from ground level to roof top (top of hospital building).
NRAARCH-DeterminedASN 2009-ANM-765-NRA2010-03-26
Heliport · 0 ft AGL — This proposal was airspaced under 2007-ANM-42-NRA as a temporary helipad (2 years). The hospital has decided to make it a permanent helipad. A site inspection has already been conducted by Flight Standards. Data has not changed.
NRAARCH-DeterminedASN 2007-ANM-42-NRA2007-04-11
Heliport · 0 ft AGL — 7480-1. St. Mary's Hospital has an existing ground level heliport that has previously been airspaced. This notice will establish a temporary helipad for a period of two years until a new hospital building is constructed and then a new permanent rooftop helipad will be established.
NRAARCH-DeterminedASN 2002-ANM-1059-NRA2002-06-11
Other · 0 ft AGL — RELOCATION OF EXISTING HOSPITAL HELIPAD
Blueprint
The record vs. what we measured
59/100
DATA INTEGRITY
eVTOL footprint
The 46 ft pad is 54 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation4830 ft4830 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions46 ft side (filed)46 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.
ST MARY'S HOSPITAL & MEDICAL CENTER, GRAND JUNCTION, CO (FAA 29CO). AirIndex facility record aix:hp:WG9CHEFX. Verifiable at https://www.airindex.io/verify/aix:hp:WG9CHEFX.