OHIOPYLE, Pa.—Rescue crews have been searching for a man who disappeared while rafting on a western Pennsylvania river.

Officials in Fayette County say the 22-year-old man went missing shortly after noon Saturday while whitewater rafting on the Youghiogheny (yawk-a-GEN'-nee) River near Dimple Rock.

Jim Greenbaum, river operations manager for White Water Adventurers, told the Pittsburgh Post-Gazette that he was told that the man's raft flipped at Dimple Rock.

Greenbaum said the victim was swept about 200 yards downstream and disappeared near an area known as "Swimmer's Rapid."

Dimple Rock, a boulder in the whitewater of the lower Yough, and Swimmers Rapid have been the site of at least 10 deaths over the last three decades.