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Owner self-reported — never independently field-inspected
Location confidence
No coordinate anomaly detected
Terrain cross-check (USGS 3DEP)
FAA 252 ft MSL · USGS ground 196 ft · Δ 56 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Rooftop pad — the coordinate falls on a building footprint
Building height ≈ 48 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
UNVERIFIEDConversion feasibility · four readings, one line each
Obstruction screen
No data
No FAA obstacle data on file for this state. Clearance unverified.
Geometry
Requires 56 feet of expansion
Recorded pad side 44 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 56 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
44 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
18NH
AIX ID
aix:hp:7A504DN6
Lat / Lng
42.99170, -71.47411
Elevation
252 ft MSL
Pad dimensions
44 × 44 ft
Surface type
ASPH
Surface condition
GOOD
Activation date
2010/03
Last owner update
2022/03/17
FAA OEAAA airspace determinations2
Airspace clearance
On file as archived / procedural records — no standing clearance to track.
Filing activity
Most recent determination 2007-09-18
NRAARCH-DeterminedASN 2007-ANE-103-NRA2008-02-26
Heliport · 0 ft AGL — This was studied under 2002-ANE-6053-NRA however the proponent never completed the 5010 to have the site entered into NASO. We are restudying this to make sure there are no changes to the facility.
NRAARCH-DeterminedASN 2002-ANE-6053-NRA2002-09-19
Other · 0 ft AGL — Proposed to build a heliport on the rooftop of the hospital. Final approach to be 100'x200' Touchdown and Lift-off area to be 50'x50' magnetic direction is to be 190/330. Surface will be Rooftop elevated steel platform.\r\n***Plans on file in ANE-600 if needed***
Blueprint
The record vs. what we measured
64/100
DATA INTEGRITY
Surface elevation
The FAA record places this pad at 252 ft. USGS terrain plus the building put the actual rooftop at 244 ft — a -8 ft difference the federal record doesn’t carry.
eVTOL footprint
The 44 ft pad is 56 ft short of the 100 ft an eVTOL FATO requires (measured).
SIGNALFEDERAL RECORDMEASURED
Surface elevation252 ft244 ft · USGS+structure
Structurenot on recordRooftop pad
Pad dimensions44 ft side (filed)44 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.
CATHOLIC MEDICAL CENTER, MANCHESTER, NH (FAA 18NH). AirIndex facility record aix:hp:7A504DN6. Verifiable at https://www.airindex.io/verify/aix:hp:7A504DN6.