Landslide Dam - Examples

Examples

• The highest known landslide dam of historic times is the Usoi Dam in modern Tajikistan created by a landslide triggered by an earthquake on February 18, 1911. It dammed the Murghab River to the height of 301 m (987 ft) to impound Sarez Lake 932 ft (284 m) deep.
• Lake Waikaremoana in New Zealand was formed by a 250m high landslide dam believed to be 2,200 years old. Between 1935 and 1950 the landslide was tunneled and sealed to stabilise it so it could be used for hydroelectric power generation. This appears to be the first example of modification of a natural landslide dam for power generation.
• Attabad Lake in Pakistan was formed by a landslide in 2010. (100m high)
• The "Red Lake" (Romanian: Lacul Roşu) is a barrier lake in the Eastern Carpathians chain in Harghita County, Romania. The name of "Lacul Roşu" comes from the reddish alluvia deposited in the lake by the Red Creek.
• The "Gros Ventre landslide" is an example of a huge, short-lived and disastrous landslide dam (60 m high).
• Quake Lake, created in Montana in 1959. (58m high)
• The Tangjiashan Lake, a dangerous "quake lake", was created as a result of the 2008 Sichuan earthquake. It was located in the extremely rugged terrain of Tangjiashan Mountain. Chinese engineers, scientists, and soldiers were involved in the digging of a sluice to alleviate the dangers of this one of 34 landslide dams created by the magnitude 8.0 Sichuan earthquake. On June 10, 2008, the lake started to drain via the sluice, flooding the evacuated town of Beichuan. (52m high)
• The Riñihuazo begun on 22 May 1960, after a landslide caused by the Great Chilean Earthquake blocked Riñihue Lake's outflow. According to the chronicler Mariño de Lobera a similar event occurred after the 1575 Valdivia earthquake. (26m high)

• Among the most destructive landslide lake outburst floods in recorded history occurred in the Sichuan province of China on 10 June 1786 when the dam on the Dadu River burst, causing a flood that extended 1400km downstream and killed 100,000 people.

• The largest landslide dam in Britain impounds Tal-y-llyn Lake (Llyn Mwyngil) beside Cadair Idris in Snowdonia National Park, Wales. It was first recognised by E Watson in 1962. It is probably over 10,000 years old.