Igzer Oftis Dam or Derkine Dam is a concrete dam with a height of 30 meters. It was built between 1945 and 1950 in Dergina municipality, Bejaia state. Its importance is to provide irrigation and drinking water; As well as operating the power plant by hydroelectric power, and the dam is characterized by a charming landscape, and attracts large numbers of visitors wishing to swim, dive, picnic, recreation, sail boats and walk along its banks.