Lake Nasser
The Aswan High Dam, constructed in Egypt in 1964–1968, created Lake Nasser, with a maximum water level of above sea level. In 1978 Egypt began building the Sadat Canal NW from Lake Nasser through Wadi Toshka to allow water levels higher than to be drained off into a hollow at the south end of the Eocene limestone plateau. In the late 1990s, water began flowing through the Sadat Canal into the Western Desert. This feeder canal from Lake Nasser is concrete-lined, to reduce seepage losses.