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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 1000 ft MSL · USGS ground 1009 ft · Δ -8 ft
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
Site use
⚠ Event-venue landing site — may not be a standing facility
Facility name identifies an event venue (SPEEDWAY). The FAA record carries no use-frequency field; the pad may exist only for events. Confirm a standing facility before treating it as a conversion candidate.
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
UNVERIFIEDConversion feasibility · four readings, one line each
Obstruction screen
No data
No FAA obstacle data on file for this state. Clearance unverified.
Geometry
Requires 65 feet of expansion
Recorded pad side 35 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
Unverified
No obstruction data on file. The dimensional gap applies; clearance is unverified.
The recorded pad is 65 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
35 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
MI66
AIX ID
aix:hp:S3P9CRWY
Lat / Lng
42.05889, -84.23933
Elevation
1000 ft MSL
Pad dimensions
35 × 35 ft
Surface type
TURF
Activation date
2006/05
Last owner update
2020/04/01
FAA OEAAA airspace determinations1
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 1999-01-25
NRAARCH-DeterminedASN 1999-AGL-615-NRA2008-02-11
Other · 995 ft AGL — PRIVATE USE HELIPORT HARD COPY SENT BY MAIL.
Blueprint
The record vs. what we measured
62/100
DATA INTEGRITY
eVTOL footprint
The 35 ft pad is 65 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation1000 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions35 ft side (filed)35 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.
MICHIGAN INTL SPEEDWAY, BROOKLYN, MI (FAA MI66). AirIndex facility record aix:hp:S3P9CRWY. Verifiable at https://www.airindex.io/verify/aix:hp:S3P9CRWY.