A Morristown teenager has drowned on Boone Lake. The victim has been identified as 16 year old Marco Antonio Delgado. According to the Sullivan County Sheriff's Department he drowned around 1:30 Saturday afternoon at a public swimming area. Delgado and a relative were together when he swam beyond the boundary markers and went under. He was airlifted by Wellmont One to Holston Valley Hospital where he was pronounced dead. (jb)