Q129
What failure occurred in the St. Francis Dam in 1928 due to overlooked geology?
A.
Overburden collapse
B.
Weak metamorphic rock at abutment
AnswerC.
Fault movement
D.
Sediment clogging
Answer: Option B
Solution
Answer: Option B
Solution:
The dam failed catastrophically due to a weak schist layer at the dam abutment, which was not properly identified or supported.