575 Unknown (possibly neglect) 1802 608 deaths, 1800 houses and 40000 trees destroyed[1] 1864 Defective construction, small leak in wall grew until dam failed. 1889 Blamed locally on poor maintenance by owners; court deemed it an "Act of God". Followed exceptionally heavy rainfall. Caused Johnstown flood. Walnut Grove Dam 1890 Heavy snow and rain following public calls by the dam's chief engineer to strengthen the earthen structure. 1900 Extreme current caused failure. 1911 Poor design, use of dynamite to remedy structural problems. Desná Dam 1916 Construction flaws caused the dam failure Lake Toxaway Dam 1916 Heavy rains caused the dam to give way. Dam was later rebuilt in the 1960s 1916 Over-topped from flooding 1916 Over-topped from flooding; 40 deaths 1923 Poor construction and design Llyn Eigiau dam and the outflow also destroyed Coedty reservoirdam. 1925 Contractor blamed cost-cutting in construction but 25" of rain had fallen in preceding 5 days. This was the last dam failure to cause death in the UK to date (2010). 1928 Geological instability of canyon wall that could not have been detected with available technology of the time, combined with human error that assessed developing cracks as "normal" for a dam of that type. Nanty Gro Reservoir in Wales 1942 Nanty Gro Valley, Wales Destroyed during preparation for Operation Chastise in World War II. Eder, Möhne Dams 1943 Destroyed by bombing during Operation Chastise in World War II. Vega de Tera 1959 1959 Geological fault possibly enhanced by explosives work during construction; initial geo-study was not thorough. 1963 Subsidence caused by over-exploitation of local oil field Spaulding Pond Dam (Mohegan Park) 1963 6 deaths, more than $6 million estimated damages 1963 Strictly not a dam failure, since the dam structure did not collapse and is still standing. Filling the reservoir caused geological failure in valley wall, leading to 110 km/h landslide into the lake; water escaped in a seiche over the top of dam. Valley had been incorrectly assessed stable. 1966 A tailings dam at Plakalnitsa copper mine near the city of Vratsa failed. A total 450,000 cu m of mud and water inundated Vratsa and the nearby village of Zgorigrad, which suffered widespread damage. The official death toll is 107, but the unofficial estimate is around 500 killed. [4] 1972 Unstable loose constructed dam created by local coal mining company, collapsed in heavy rain 1972 Flooding, dam outlets flooded with debris. 1975 Extreme rainfall beyond the planned design capability of the dam 1976 Water leakage through earthen wall, leading to dam failure. 1977 Heavy rainfall and flooding that over-topped the dam. 1977 Unknown, possibly design error as dam was raised several times by owners to improve power generation. 1979 Heavy rain and flooding beyond spillway capacity. 1979 Flooding beyond discharge and storage capacity damaged the main dam and destroyed the secondary dam in the scheme. 1982 Outlet pipe erosion; dam under-maintained due to location 1982 1985 Poor maintenance and low margin for error in design; outlet pipes failed leading to pressure on dam. Peruća Dam detonation 1993 Not strictly a dam failure as there was a detonation of pre-positioned explosives by retreating Serb Forces. 1996 Problems started after two weeks of constant rain, which severely engorged soils, rivers and reservoirs. Post-flood enquiries discovered that the network of dikes and dams protecting the city was poorly maintained. 1996 Design and construction deficiencies resulted in failure in heavy icing conditions 1997 Heavy rain during construction caused failure, dam was later completed Vodní nádrž Soběnov 2002 Extreme rainfall during the 2002 European floods Ringdijk Groot-Mijdrecht 2003 Peat dam became lighter than water during droughts and floated away 2003 Heavy rains caused earthen dam and bank to wash away 2004 A small hole in the dam, grew bigger and eventually led to failure. 2004 2005 Sudden and extreme flooding caused by abnormally severe rain, 70 deaths 2005 Computer/operator error; gauges intended to mark dam full were not respected; dam continued to fill. Minor leakages had also weakened the wall through piping. 2006 Tunnel collapse 2006 Heavy flooding 2006 Heavy rain and flooding. Several possible specific factors to include poor maintenance, lack of inspection and illegal modifications. June 9th, 2008 Failure due to June 2008 Midwest floods. 2008 Heavy rain. Situ Gintung Dam 2009 Poor maintenance and heavy monsoon rain 2010 Heavy rain and snowmelt 2010 Sinkhole caused dam failure 2010 Heavy rain, flooding. October 4, 2010 Failure of concrete impound wall on alumina plant tailings dam. Kenmare Resources tailings dam October 8, 2010 Failure of tailings dam at titanium mine. March 11, 2011 Failed after 2011 Tōhoku earthquake. MullaPeriyar*** Coming soon India, Kerala Failed due to irresponsibility of central & state govt. and stubbornness of Tamil Nadu, (nearby state)
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