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When sand and gravel foundation strata are available at a proposed dam site of moderate height, the dam may be of the type ________________

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in Irrigation Engineering by (75.2k points)
When sand and gravel foundation strata are available at a proposed dam site of moderate height, the dam may be of the type ________________

(a) earthen or rockfill dam

(b) masonry gravity dam

(c) concrete gravity dam

(d) double arch dam

The question was asked during an interview for a job.

This key question is from Various Types of Dams in chapter General and Particular Dams of Irrigation Engineering

1 Answer

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by (106k points)
The correct answer is (a) earthen or rockfill dam

Easy explanation: The piles of loose rocks and boulders in the river bed are nothing but rockfill. On the upstream face of the dam, a slab of reinforced concrete is often laid to make it watertight.

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