Corps tests aim to gauge stability of soils under Foster Dam, earthquake resistance


October 31, 2018

NATALIE EHRLICH, a geotechnical engineer with the U.S. Corps of Engineers, and Kyle Romney of Shannon and Wilson, Inc., prepare a sample of silt from below Foster Dam for shipment.

The U.S. Army Corps of Engineers drilled into and through Foster Dam last week as part of a test of underlying soils to determine how well the dam will hold up during an earthquake.

The Corps' Dam Drill Safety Team spent the week, beginning Monday, Oct. 22, conducting tests and removing samples. Corps staff anticipated completing the drilling by the end of October.

The work is part of a larger geotechnical assessment in which data from the borings will provide information on the physical properties of the dam. The dam safety team will then use the data to study how the dam will perform un...

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