| 2025-09-30 | Underground waterway |
| 2025-05-31 | Underline? |
| 2024-05-28 | Waste conduit |
| 2024-03-07 | Waste's way away |
| 2023-08-27 | Pipe down? |
| 2023-06-15 | Frequent setting for the Ninja Turtles |
| 2023-06-03 | Part of an underground system |
| 2023-04-22 | "The sea is the universal ___": Jacques Cousteau |
| 2022-11-20 | Ninja Turtles' abode |
| 2022-06-21 | Ninja turtle hangout |
| 2022-04-14 | Waste line |
| 2021-10-05 | Home for the Teenage Mutant Ninja Turtles |
| 2021-04-14 | What may raise a big stink? |
| 2020-02-09 | Underground channel |
| 2016-10-24 | Waste conduit |
| 2016-05-29 | Part of a city network |
| 2014-08-20 | Runoff conduit |
| 2013-10-05 | Something beyond the grate divide? |
| 2013-09-23 | Waste carrier |
| 2012-03-08 | "Ratatouille" setting |
| 2011-10-04 | Drainage system |
| 2010-01-17 | Waste line |
| 2008-07-21 | Stinky stream |
| 2008-02-13 | Storm drain, e.g. |
| 2007-08-25 | Place of refuse |
| 2007-03-25 | It may be found under a grate |
| 2006-11-22 | Ratty place |
| 2006-10-10 | Rats' milieu |
| 2006-08-26 | "Les Misérables" locale |
| 2006-08-22 | Stinky locale to work |
| 2006-08-15 | Waste conduit |
| 2004-12-13 | Waste conduit |
| 2004-01-26 | System utilizing grates |
| 2003-10-11 | Valjean's hideout |
| 2003-01-13 | Job title (giving a hint to this puzzle's theme) |
| 2003-01-01 | Setting for a famous "Les Misérables" scene |
| 2002-11-04 | Underground conduit |
| 2002-02-05 | Ed Norton's workplace |
| 2001-10-18 | One who'll put you in stitches? |
| 2001-06-27 | Rats' hangout |
| 2001-01-21 | Ratty place |
| 1999-04-04 | Urban alligator's home, they say |
| 1998-07-30 | Drainage system |
| 1997-01-19 | "Les Miz" setting |
| 1996-12-31 | Drain |
| 1996-11-18 | Underground passage |
| 1995-06-02 | Drain |
| 1995-01-17 | Underground way |
| 1994-12-02 | "Les Miz" setting |
| 1994-04-26 | Betsy Ross, e.g. |
| 1994-03-12 | Culvert |
| 1994-01-07 | Norton's workplace |