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Owner self-reported — never independently field-inspected
Location confidence
⚠ Location-suspect — recorded coordinates may be mislocated
Terrain cross-check (USGS 3DEP)
FAA 720 ft MSL · USGS ground 589 ft · Δ 131 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 →
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 56 feet of expansion
Recorded pad side 44 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 56 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
44 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
LL37
AIX ID
aix:hp:F4Z1W9RK
Lat / Lng
40.70276, -89.59213
Elevation
720 ft MSL
Pad dimensions
44 × 44 ft
Surface type
ROOF-TOP
Activation date
1968/07
Last owner update
2022/04/28
FAA OEAAA airspace determinations3
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2009-05-26
NRAARCH-DeterminedASN 2009-AGL-1210-NRA2010-10-26
Heliport · 147 ft AGL — Establish new rooftop heliport 427' NE (014�)of existing heliport. Rooftop heliport will become primary. No simultaneous operations. All operations in contact with Med Comm.
NRAARCH-DeterminedASN 2007-AGL-201-NRA2007-04-19
Heliport · 0 ft AGL — Abandon elevated heliport on top of parking garage h1. New elevated heliport (case 2006-AGL-340-NRA) to remain as the active heliport.
NRAARCH-DeterminedASN 2006-AGL-340-NRA2007-01-18
Heliport · 0 ft AGL — Relocate existing surface heliport (H2) approximately 236' SSE & change inbound approaches to 010° & 140°. Elevated H1 heliport to remain active.
Blueprint
The record vs. what we measured
60/100
DATA INTEGRITY
eVTOL footprint
The 44 ft pad is 56 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation720 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions44 ft side (filed)44 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.
OSF ST FRANCIS MEDICAL CENTER, PEORIA, IL (FAA LL37). AirIndex facility record aix:hp:F4Z1W9RK. Verifiable at https://www.airindex.io/verify/aix:hp:F4Z1W9RK.