AirIndex Research · FAA LID 3NH4

PORTSMOUTH RGNL HOSPITAL

PORTSMOUTH, NH. Operational · Private use.

OperationalPrivate usePrivate

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Data integrity

60/100
CorroboratedData Integrity Index
Independent inspection
Owner self-reported — never independently field-inspected
Location confidence
⚠ Location-suspect — recorded coordinates may be mislocated
Terrain cross-check (USGS 3DEP)
FAA 62 ft MSL · USGS ground 26 ft · Δ 36 ft
Differential consistent with an elevated / rooftop pad
Structure cross-check (Overture / OSM)
Ground-level — no building footprint at the coordinate
Cross-source consensus
⚠ Sources conflict — FAA elevation sits above terrain, but no building is at the coordinate
Either a freestanding / tower pad or a mislocated coordinate — independent verification recommended.

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 50 feet of expansion
Recorded pad side 50 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.
100 ft · eVTOL FATO50 ft
The recorded pad is 50 ft short of the 100 ft footprint an eVTOL would need — shown to scale.
recorded pad eVTOL FATO
Recorded pad (limiting side)
50 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 2014-ANE-683-NRA determined 2014-08-27
Q3 · State enforcementUNKNOWN
State enforcement posture not yet assessed.
Q4 · NFPA 418UNKNOWN
NFPA 418 adoption status not yet assessed for this jurisdiction.

FAA facility data

FAA LID
3NH4
AIX ID
aix:hp:P1GQP2YR
Lat / Lng
43.06461, -70.79151
Elevation
62 ft MSL
Pad dimensions
50 × 50 ft
Surface type
CONC
Activation date
2015/12
Last owner update
2020/07/30

FAA OEAAA airspace determinations3

Airspace clearance
Airspace clearance on file is current.
Clearance posture: current (531d)
Nearby obstructions (OE/AAA-determined structures)
1 structure determined near the pad · tallest 120 ft AGL
Active construction (crane / in-progress) filed recently — obstruction environment is changing.
Filing activity
Most recent determination 2026-08-19 · 1 in the last 24 months
  • OEDET-DNE-TMPcurrent (531d)ASN 2026-ANE-1951-OE
    2026-09-08
    CRANE$FIXED · 120 ft AGL — Mobile Truck Crane
  • NRAARCH-DeterminedASN 2014-ANE-683-NRA
    2014-08-27
    Heliport · 0 ft AGL — This was studied in 2012 however funding fell through so they are looking to construct now. Nothing has changed since the original filing. We are looking to extend the determination as construction is going to start next month.
  • NRAARCH-DeterminedASN 2012-ANE-125-NRA
    2012-05-09
    Heliport · 0 ft AGL — Consturction of a medical heliport. The concrete heliport will have a FATO of 79'x79' and a TLOF of 44'x44' with a NW/SE Ingress and Egress. The heliport will have lighting that is activated via PCL.
Blueprint
The record vs. what we measured
60/100
DATA INTEGRITY
eVTOL footprint
FATO 100 ft reqHTLOF 50 ft

The 50 ft pad is 50 ft short of the 100 ft an eVTOL FATO requires (measured).

SIGNALFEDERAL RECORDMEASURED
Surface elevation62 ftnot cross-checked
Structurenot on recordGround-level
Pad dimensions50 ft side (filed)50 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.
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:P1GQP2YR · Methodology →
Cite this facility

PORTSMOUTH RGNL HOSPITAL, PORTSMOUTH, NH (FAA 3NH4). AirIndex facility record aix:hp:P1GQP2YR. Verifiable at https://www.airindex.io/verify/aix:hp:P1GQP2YR.

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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