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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 684 ft MSL · USGS ground 667 ft · Δ 17 ft
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
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 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
Conditional
Obstruction screen passed. Geometry and structural capacity remain open. Site validation required.
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.
FAA compliance
Q1 · FAA registrationPASS
Active FAA NASR 5010 record.
Q2 · Airspace determinationON_FILE
OE/AAA ASN 2024-AGL-15880-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
45IL
AIX ID
aix:hp:690E1NH7
Lat / Lng
42.25470, -87.86441
Elevation
684 ft MSL
Pad dimensions
46 × 46 ft
Surface type
CONC
Activation date
1989/02
Last owner update
2020/05/19
FAA OEAAA airspace determinations2
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2024-11-19 · 1 in the last 24 months
Form 7480 · 0 ft AGL — LAP ASN # 2024-CSA-415-LAP\r\nProposed Alteration to Existing Heliport - Helipad H1 is being relocated within same hospital campus.
NRAARCH-DeterminedASN 2016-AGL-5473-NRA2016-09-02
Other · 0 ft AGL — 7480-1 TO ALTER THE APPROACH PATH AT THE HELIPORT FROM 140 DEGREES TO 150 DEGREES DUE TO NEW BUILDING CONSTRUCTION. THE OTHER APPROACH WILL REMAIN 350 DEGREES
Blueprint
The record vs. what we measured
72/100
DATA INTEGRITY
eVTOL footprint
The 46 ft pad is 54 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation684 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions46 ft side (filed)46 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.
NORTHWESTERN LAKE FOREST HOSPITAL, LAKE FOREST, IL (FAA 45IL). AirIndex facility record aix:hp:690E1NH7. Verifiable at https://www.airindex.io/verify/aix:hp:690E1NH7.