A male rider of an all-terrain vehicle was found dead this morning on the Big Island after falling 8 to 10 feet onto a rocky stream bed, Big Island firefighters said.

The rider, identified by Hilo police as Bill Maclean, 48, of Ninole, was found about three-quarters of a mile off Piha-Kahuku Road on 1 Lane Road near Laupahoehoe.

Firefighters were called after 8 a.m.

He apparently drove off a concrete bridge with no railing, and was discovered with his head under 2 feet of water, with one leg pinned under the ATV, firefighters said.

A woman told firefighters that she had been expecting the victim to pick her up last night but he had never shown up. She discovered his body this morning.