The Flemington-Raritan First Aid and Rescue Squad responded to Toad Lane in East Amwell Township just after 9:15 a.m., the squad said.
Initial reports described a man pinned under a machine at 33 Toad Lane. The address appears on Google as the location for Rowe Electric.
Upon arrival, crews found that the man was no longer trapped but still required a medical helicopter due to serious injuries, FRFARS said.
The Amwell Valley Fire Company then set up a landing zone in a nearby field as crews began on-scene care.
The man was ultimately airlifted via NJSP NorthSTAR to the trauma center at Capital Health Regional Medical Center - Helene Fuld in Trenton for further treatment.
The scene was clear in about an hour, the squad said.
Assisting agencies include the Hunterdon Medical Center mobile intensive care unit EMS-3 and the Amwell Valley Fire Company.
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