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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 639 ft MSL · USGS ground 615 ft · Δ 24 ft
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 49 ft — measured independently of the FAA record
Cross-source consensus
Single independent source — no corroboration available
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
CONDITIONALConversion feasibility · four readings, one line each
Obstruction screen
Clear
No obstructions within 0.5 nm on the FAA obstacle file.
Geometry
Requires 55 feet of expansion
Recorded pad side 45 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
Conditional
Obstruction screen passed. Geometry and structural capacity remain open. Site validation required.
The recorded pad is 55 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
45 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.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationON_FILE
OE/AAA ASN 2024-AGL-16665-NRA: DET-to-Prop
Q3 · State enforcementLIMITED
State has limited enforcement of FAA standards.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.
FAA facility data
FAA LID
IS29
AIX ID
aix:hp:6RC5Q0V2
Lat / Lng
41.11337, -88.83522
Elevation
639 ft MSL
Pad dimensions
45 × 45 ft
Surface type
MATS
Activation date
1980/07
Last owner update
2020/07/27
FAA OEAAA airspace determinations2
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2024-12-17 · 1 in the last 24 months
Form 7480 · 18 ft AGL — LAP ASN # 2024-CSA-478-LAP\r\nAlteration of existing private-owned/private-use hospital heliport -- changing inbound approach to H1 from 40 to 360.
NRAARCH-DeterminedASN 2003-AGL-627-NRA2003-12-16
Other · 210 ft AGL — Proposed hospital rooftop heliport. Awaiting airport location diagram and heliport layout diagram from proponent. - FAA FORM 7480-1 RETURNED TO PROPONENT FOR SUBMISSION TO IDOT IDA.
Safety history (NTSB)1
Accident history
1 NTSB helicopter event within 3 nm since 2010 (1 accident); most recent 2013-07-29.
ACCIDENT0.0 nm2013-07-29
TEXAS HELICOPTER CORP OH-13H/M74A · Streator, IL — 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
59/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 639 ft. USGS terrain plus the building put the actual rooftop at 665 ft — a +26 ft difference the federal record doesn’t carry.
eVTOL footprint
The 45 ft pad is 55 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation639 ft665 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions45 ft side (filed)45 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.
OSF CENTER FOR HEALTH - STREATOR, STREATOR, IL (FAA IS29). AirIndex facility record aix:hp:6RC5Q0V2. Verifiable at https://www.airindex.io/verify/aix:hp:6RC5Q0V2.