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Vinony

spillway

noun

  1. structure for controlled release of flows from a dam or levee
L328258 on Wikidata ↗

Wiktionary

noun

Etymology: From spill + way.

  1. A path designed to take away overflow safely.

    “Absence of filtered undrains beneath spillways or behind walls.”

    “On February 24, 319379 crosses the wrought-iron Carr Mill Viaduct with Northern's 1515 Liverpool Lime Street-Wigan North Western service, viewed from a spillway for the reservoir.”