They used thermal imaging to confirm that on Wednesday.
The fire was first reported around 8:20 a.m. Tuesday.
Chopper 6 over barge fire on Delaware River in New Castle, Delaware
It sent massive plumes of black smoke into the air as crews from Pennsylvania, New Jersey, Delaware and the Coast Guard battled the flames.
A salvage plan is being finalized as the barge transits to port in Camden.
No one was hurt in the fire.
RELATED: Massive fire erupts on scrap metal barge in Delaware Bay