MOSCOW (Sputnik) — The incident was reported by neighbors who heard calls for help coming from the dam, Frederick County Fire and Rescue Captain Kevin Fox said in a Facebook posting.
One person died in the fall, while eight survived it and were taken to safety by local fire, rescue and police crews.
"The boating fatality was recovered from the Lake Linganore Dam at approximately 11 p.m. (3:00 GMT)," Fox said.
Four other passengers were found on the dam's ledge, one rescued from the water by swiftwater-trained rescuers, and the rest three victims were hoisted from the spillway by a police helicopter. All eight survivors were brought to Frederick Memorial Hospital.