The man has been identified as 25-year-old Jose Luiz Hernandez-Miranda.
Shortly after 11:26 a.m., police responded to a property on Mailekea Road, which is off Kaiwiki Road in the Wainaku area of Hilo.
They learned that Hernandez-Miranda had been operating a Ford tractor on a farm when he got too close to the edge of a 12-foot cliff above a stream and fell into the stream with the tractor.
Fire/rescue personnel extricated him from the water and took him to Hilo Medical Center, where he was pronounced dead at 12:38 p.m.
Police have initiated a coroner's inquest case and have ordered an autopsy to determine the exact cause of death.
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