SLUICE
| Date | Clue |
|---|---|
| 2023-04-13 | Water gate |
| 2022-07-15 | Streaming channel? |
| 2020-01-04 | Waterway |
| 2016-12-20 | Sloping water trough |
| 2016-03-23 | Gated water channel |
| 2001-01-10 | Water channel |
| 2000-06-18 | Floodgate |
| 1999-05-12 | Floodgate |
| 1998-03-17 | Floodgate |
| 1997-05-25 | Floodgate |
| 1996-10-19 | Artificial channel |