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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 640 ft MSL · USGS ground 760 ft · Δ -120 ft
Structure cross-check (Overture / OSM)
On a building footprint — height not tagged in the source
Building height ≈ 16 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
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 20 feet of expansion
Recorded pad side 80 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 20 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
80 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 determinationUNKNOWN
FAA OE/AAA airspace determination data integration pending.
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
2IS1
AIX ID
aix:hp:4YDKZJK8
Lat / Lng
40.75346, -89.59879
Elevation
640 ft MSL
Pad dimensions
250 × 80 ft
Surface type
CONC
Activation date
1983/06
Last owner update
2023/10/13
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2026-08-14 · 1 in the last 24 months
NRADET-to-PropASN 2026-AGL-13116-NRA2026-09-15
Form 7480 · 5 ft AGL — LAP ASN # 2026-CSA-548-LAP\r\nSee Case Notes.
Safety history (NTSB)1
Accident history
1 NTSB helicopter event within 3 nm since 2010 (1 accident); most recent 2012-05-27.
ACCIDENT2.6 nm2012-05-27
Robinson Helicopter Company R44 II · Peoria, 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
54/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 640 ft. USGS terrain plus the building put the actual rooftop at 775 ft — a +135 ft difference the federal record doesn’t carry.
eVTOL footprint
The 80 ft pad is 20 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation640 ft775 ft · USGS+structure
Structurenot on recordOn a building
Pad dimensions80 ft side (filed)80 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.