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If the path of an irrigation canal is below the bed level of a natural stream, the type of cross-drainage structure provided is:

  • A.Sluice gate
  • B.Aqueduct
  • C.Super Passage
  • D.Level Crossing

Answer: C

The structure is a Super Passage.

Where the canal bed is below the bed of the natural stream, the stream is carried over the canal in a flume or trough, and the canal passes beneath. This is a super passage.

An aqueduct is the reverse case, carrying the canal over the drainage when the canal is above the stream. A level crossing is used when both are at about the same level, and a sluice gate is a regulating device, not a cross-drainage work.

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