Authorities said the two teen boys were fishing on the water when the current got hold of them and took them down river.
The 17-year-old was able to escape, but Spivey got into what officials described as an "extremely deep" portion of the river and was drawn under water and never resurfaced.
"There's a lot of varying depths in that particular waterway. The water
moves fairly rapidly and although on the surface it may appear to be moving at
a slow rate there's a definitive undertow in that area and it can easily pull
an adult good swimmer underwater," said Monroe fire chief John Centers.
The Butler County Regional Water Rescue Team located Spivey's body around 10:35 p.m. by using a rescue boat equipped with a side sonar scan system.
The coroner's office ruled Spivey's death as an accidental drowning Tuesday following an autopsy.
Butler County Sheriff Richard Jones said that he urges everyone to avoid swift moving water because they have currents and undertows that can't be seen on the surface.