Q14
What factor caused the failure of the St. Francis Dam (California, 1928)?
A.
Poor rock quality and geological mapping
AnswerB.
Excessive rainfall
C.
Foundation scour
D.
Overloading
Answer: Option A
Solution
Answer: Option A
Solution:
The St. Francis Dam failed due to lack of understanding of the geological conditions, particularly weak schist and faulted rock under the dam. It highlighted the importance of geological surveys in dam safety.