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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 810 ft MSL · USGS ground 770 ft · Δ 40 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 ≈ 40 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
CONSTRAINEDConversion feasibility · four readings, one line each
Obstruction screen
Obstructed
Obstruction within 0.5 nm on the FAA obstacle file.
Geometry
Requires 60 feet of expansion
Recorded pad side 40 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
Constrained
Obstruction within 0.5 nm plus the required footprint expansion. Site validation required.
The recorded pad is 60 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
40 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
IL25
AIX ID
aix:hp:988R62KR
Lat / Lng
40.49673, -88.99066
Elevation
810 ft MSL
Pad dimensions
40 × 40 ft
Surface type
MATS
Activation date
2002/10
Last owner update
2023/10/26
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2011-12-22
NRAARCH-DeterminedASN 2011-AGL-6183-NRA2013-01-08
Heliport · 0 ft AGL — 7480-1 to change the approach from 080 degrees to 060 degrees.\r\nAlternate phone for Dwight Hill is 309-454-0755
Blueprint
The record vs. what we measured
64/100
DATA INTEGRITY
eVTOL footprint
The 40 ft pad is 60 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation810 ft810 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions40 ft side (filed)40 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.
CARLE BROMENN MEDICAL CENTER, NORMAL, IL (FAA IL25). AirIndex facility record aix:hp:988R62KR. Verifiable at https://www.airindex.io/verify/aix:hp:988R62KR.