Examveda

What failure occurred in the St. Francis Dam in 1928 due to overlooked geology?

A. Overburden collapse

B. Weak metamorphic rock at abutment

C. Fault movement

D. Sediment clogging

Answer: Option B

Solution (By Examveda Team)

The dam failed catastrophically due to a weak schist layer at the dam abutment, which was not properly identified or supported.

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