A pontoon with four people went over the power dam at Lake Zumbro Saturday evening.
The boaters were near the edge of the dam when the driver realized and failed to maneuver away, according to the Wabasha County Sheriff's Office.
One passenger jumped off and was able to gain the attention of other boaters.
Three other passengers rode the pontoon over the dam where they safely landed upright.
One person was taken to a hospital with what appeared to be non-life threatening injuries.
The incident is still under investigation.