| Answer | Crossword Clue |
|---|---|
| WEIR | Dam for diverting water |
| spillways | A passage for surplus water from a dam |
| spillway | A passage for surplus water from a dam |
| flashboards | A board used for increasing the depth of water behind a dam |
| flashboard | A board used for increasing the depth of water behind a dam |
| wasteweir | a sluiceway or passage for superfluous water in a reservoir, to prevent too great pressure on the dam, aka a spillway |
| wasteweirs | WASTEWEIR, a sluiceway or passage for superfluous water in a reservoir, to prevent too great pressure on the dam, aka a spillway |
