Rajjaprabha Dam or Cheow Lan Dam is a multi-purpose dam in Ban Cheow Lan, Tambon Khao Phang, Ban Ta Khun District, Surat Thani Province. Its purpose is electricity generation, irrigation, flood control, and fishing. Construction started on 9 February 1982. It was inaugurated on 30 September 1987. King Bhumibol Adulyadej gave the dam the name "Rajjaprabha", meaning 'light of the kingdom'.