Question

Which of the following statement is correct with reference to earthen dams?

(a) These dams are very costly as compared to other types

(b) Gravity dams are less susceptible to failure as compared to rigid dams

(c) These dams are suitable for construction on almost every type of foundation

(d) Highly skilled labor is generally not required

This question was posed to me in examination.

My doubt is from Types of Earthen Dams in section Earthen and Rock Fill Dams of Irrigation Engineering

Answer 1

Correct choice is (c) These dams are suitable for construction on almost every type of foundation

Best explanation: Earthen dams are suitable for any type of foundation but there has to be a separate provision for the spillway location. The mode of failure is sudden and requires high maintenance and the overall life is not so long. It requires low to moderately skilled labors and moderate capital cost.