Examveda

The cause of the St. Francis Dam disaster in California (1928) was:

A. Foundation weakness in schist

B. Fault movement

C. Rainfall-triggered overtopping

D. Seepage under the dam

Answer: Option A

Solution (By Examveda Team)

The dam failed due to a geological misinterpretation of weak schist and faulted conglomerate in the foundation, causing a massive collapse.

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