ülevooluavadega pais (vesi võib voolata ka üle kogu paisuharja) ... Ülevooluavasid saab kasutada ka palkide, jääpankade, uhtmete (madala läve korral) ja laevade läbilaskmiseks (lubatud voolukiiruse ning ava sobivate mõõtmete korral).
a notch in a levee, dam, embankment, or other barrier across or bordering a stream, through which the flow of water is regulated; e.g. a "wasteweir"
an overflow structure which may be used for controlling upstream surface level or for measuring discharge, or for both
Barrages or weirs (works constructed across the bed of a river to maintain sufficient depth of water for navigation and to reduce the speed of flow by creating pounds or reaches), associated structures (fish ladders, relief channels) ...
