Via Facebook: I understand it from some locals, the man was fishing below the dam (which has a several breaches in it) and fell out of the boat into the rapid below the dam at one of the breach points. The boat and man were not actually caught in the dam backwash.From News Story : https://wcfcourier.com/news/local/authorities-recover-body-believed-to-that-of-missing-boater/article_72a5a566-1f6d-5f81-8af2-bb3e34f10317.htmlMOUNT VERNON (AP) — Authorities have recovered a body in eastern Iowa believed to be that of a missing boater. The Linn County Sheriff’s Office says the body was found Tuesday in the Cedar River about 2 miles (3.2 kilometers) south of the boat ramp at Palisades-Kepler State Park. An autopsy was ordered and the search was called off. The sheriff’s office says the body likely is that of 59-year-old Ricky Veenstra, who lived in Cedar Rapids. Veenstra either jumped or fell from a boat on the river Sunday morning.The Gazette – Cedar Rapids, IA The body of the boater who went missing in the Cedar River on Sunday near Mount Vernon has been found, officials believe. On Tuesday, a body was found in the river about 2 miles south of the Palisades Kepler State Park boat ramp, the Linn County Sheriff’s Office said in a news release.Positive identification of the body has not been made, but authorities believe it is Ricky Veenstra, 59, of Cedar Rapids.Veenstra was in a boat just below the spillway when he went into the river and did not resurface, witnesses told officials. The body was taken to the Iowa Medical Examiner’s Office in Ankeny for an autopsy, according to the news release.It is not clear whether Veenstra fell or jumped into the water. Witnesses told officials they saw the man jump from his rocking fishing boat into the turbulent water below the dam Sunday morning. However, information from the sheriff’s office indicates the man fell from the boat.