‘The Santa Clara Valley Water District has received preliminary findings from an ongoing seismic stability evaluation for Anderson Dam that detail part of the dam could experience “significant slumping” if a 7.25 magnitude earthquake were to occur on the Calaveras Fault within about a mile of the dam.’ [Source: MorganHillTimes.com via Association of State Dam Safety Officials]
Failures
Coal Mining Company Ordered to pay $21M for Causing Crack in Pennsylvania Dam
In July of 2005, cracks began forming in the concrete dam that created Duke Lake in Ryerson Station State Park in Pennsylvania that required officials to drain the 62-acre lake. The state’s Department of Environmental […]
Project Related
Drawdown landslides in muddy sediments at the Condit Dam
Dr. Dave has a nice post about rapid drawdown slope failures and he ties it in to a neat video (below) of the removal of the Condit Dam in Washington state. The video shows some […]
Failures
$180 Million Settlement in Reservoir Failure
On December 14, 2005, the upper reservoir of the Taum Sauk pumped storage plant, a hydroelectric power plant in the Missouri Ozarks, suffered a catastrophic failure. The resulting flood severely damaged the Jonhson’s Shut-Ins State Park and swept away the park superintendent and his family. Fortunately all of them survived. (Photos by Federal Energy Regulatory Commission and USGS)
Last week, the Missouri Attorney General’s office announced a settlement of $180 million between the facility’s owner, Ameren Corp. The failure reportedly was a result of negligence on the part of the company. More details after the break.
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There are two issues here :
(1) Why this prophecy now, what credible seismic event/EQ was considered while designing the project layout, if presence of Calaveras Fault in vicinity as close as ~1.6km was known?
(2) Now with this info, what stabilisation strategy is being adopted/conceived to tackle this scenario?
thnks