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#aqueduct #water bridge #overpass #road crossing #water over road #hydraulic structure

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#stream crossing #pipe under road #water flow #road drainage #hydraulic structure

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#water level control #weir #flow regulation #dam #hydraulic structure #head difference

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#canal aqueduct #waterway crossing #water bridge #navigation crossing #level crossing #hydraulic structure

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#railway drainage #track drainage #culvert under railway #water crossing #hydraulic structure

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#weir #water level #flow regulation #hydraulic structure #dam barrier