AirIndex Research · FAA LID IS46

CGH MEDICAL CENTER

STERLING, IL. Operational · Private use.

OperationalPrivate usePrivate

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Data integrity

64/100
CorroboratedData Integrity Index
Independent inspection
Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 727 ft MSL · USGS ground 673 ft · Δ 54 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 33 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

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.
100 ft · eVTOL FATO46 ft
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
OE3A archive: ASN 2020-AGL-11218-NRA determined 2022-02-28
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
IS46
AIX ID
aix:hp:R9SBA8J6
Lat / Lng
41.80286, -89.69719
Elevation
727 ft MSL
Pad dimensions
48 × 46 ft
Surface type
ROOF-TOP
Activation date
1986/08
Last owner update
2023/11/20

FAA OEAAA airspace determinations3

Airspace clearance
Airspace clearance on file is current.
Clearance posture: current (511d)
Nearby obstructions (OE/AAA-determined structures)
1 structure determined near the pad · tallest 134 ft AGL
Active construction (crane / in-progress) filed recently — obstruction environment is changing.
Filing activity
Most recent determination 2026-08-03 · 1 in the last 24 months
  • OEDET-EBO-TMPcurrent (511d)ASN 2026-AGL-12535-OE
    2026-08-17
    CRANE · 134 ft AGL — Crane for CGH Medical Center SPD Addition
  • NRAARCH-DeterminedASN 2020-AGL-11218-NRA
    2022-02-28
    Form 7480 · 0 ft AGL — LAP ASN # 2020-CSA-96-LAP\r\n\r\nDeactivate south helipad
  • NRAARCH-DeterminedASN 2007-AGL-805-NRA
    2007-11-01
    Heliport · 0 ft AGL — Alternation to existing Heliport
Blueprint
The record vs. what we measured
64/100
DATA INTEGRITY
Surface elevation
GROUND 673ftROOFTOP 706ftbldg ~33ftFAA FILED 727ft

The FAA record places this pad at 727 ft. USGS terrain plus the building put the actual rooftop at 706 ft — a -21 ft difference the federal record doesn’t carry.

eVTOL footprint
FATO 100 ft reqHTLOF 46 ft

The 46 ft pad is 54 ft short of the 100 ft an eVTOL FATO requires (measured).

SIGNALFEDERAL RECORDMEASURED
Surface elevation727 ft706 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions46 ft side (filed)46 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.
Request Ground Truth verification

Full risk assessment

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.

Request the full assessment

Building autonomous systems? See the machine-verified feed

Provenance FAA NASR 5010 · pad dims APT cycle 2026/03/19 · USGS 3DEP terrain · Overture structure · eVTOL screen conversion-feasibility-1.1 · AIX-ID aix:hp:R9SBA8J6 · Methodology →
Cite this facility

CGH MEDICAL CENTER, STERLING, IL (FAA IS46). AirIndex facility record aix:hp:R9SBA8J6. Verifiable at https://www.airindex.io/verify/aix:hp:R9SBA8J6.

Verify this record →

AIX-IDs are free to cite and reference; the registry is the source of record. The verify link resolves this record against the audit chain.

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