| 2026-07-13 | Structure for hydroelectric power |
| 2026-04-13 | Fish ladder locale |
| 2026-02-18 | Reservoir producer |
| 2026-02-15 | Renewable energy structure |
| 2025-04-18 | Leave it to beaver? |
| 2024-12-27 | Prevent from running |
| 2024-08-03 | Block |
| 2024-07-17 | Reservoir creator |
| 2024-06-05 | It holds a lot back |
| 2024-05-29 | Structure that's subject to hydrostatic pressure |
| 2024-04-21 | Block (up) |
| 2023-12-21 | Irrigation structure |
| 2023-11-15 | Bad thing to burst |
| 2023-05-16 | Reservoir producer |
| 2023-03-20 | What the fish said when it swam into a concrete wall, per an old joke |
| 2023-01-08 | Power project |
| 2022-12-03 | Block |
| 2022-10-30 | Hoover, for one |
| 2022-09-22 | The tallest one in the U.S. is California's Oroville |
| 2022-05-01 | Leave it to beavers |
| 2021-07-30 | Army Corps of Engineers project |
| 2021-07-11 | Something to leave to beavers? |
| 2021-06-17 | Locale for a salmon ladder |
| 2021-06-16 | Stop up |
| 2021-02-11 | It holds water |
| 2020-05-25 | Hoover ___ |
| 2020-04-04 | Moat feature |
| 2020-02-02 | Horse's female parent |
| 2019-12-30 | Beavers' construction |
| 2019-09-27 | The world's largest one is in Hubei, China |
| 2019-05-31 | Put a stop to? |
| 2019-04-07 | Obstacle for a fish |
| 2019-01-27 | Hydro plant locale |
| 2018-12-18 | Stop (up) |
| 2018-10-01 | Beaver's construction |
| 2018-08-04 | Feature of a moat |
| 2018-07-09 | Beaver's project |
| 2018-05-06 | Feature of a millpond |
| 2018-04-05 | Arizona's Glen Canyon, for one |
| 2018-03-08 | Stop the flow of |
| 2017-12-27 | Challenge for salmon |
| 2017-12-09 | Channel changer? |
| 2017-08-24 | Flow stopper |
| 2017-07-06 | Fish ladder site |
| 2017-05-03 | Hydroelectric project |
| 2017-02-04 | Fish ladder site |
| 2016-12-12 | Reservoir creator |
| 2016-08-29 | Nevada/Arizona's Hoover ___ |
| 2016-07-14 | Montana's Hungry Horse ___ |
| 2016-03-17 | China's Three Gorges ___ |
| 2015-10-28 | Stop for water |
| 2015-10-20 | Beaver's construction |
| 2015-06-08 | Beaver's construction |
| 2015-05-07 | Alabama's Wilson ___ |
| 2015-03-02 | Beaver's construction |
| 2014-08-26 | Hoover ___ |
| 2014-05-04 | Water checker? |
| 2013-11-30 | Weir |
| 2013-01-04 | Corps of Engineers project |
| 2012-11-25 | Part of a horse's pedigree |
| 2011-12-07 | Hydroelectricity structure |
| 2010-12-19 | Glen Canyon ___ |
| 2010-12-04 | Stop from running |
| 2010-11-16 | Beaver's work |
| 2010-09-05 | Roosevelt or Hoover |
| 2010-07-26 | China's Three Gorges project |
| 2010-07-06 | Obstruction for salmon |
| 2010-06-28 | Beaver's construction |
| 2010-06-07 | Hoover ___ |
| 2010-05-04 | Hydroelectric project |
| 2010-04-30 | Clog |
| 2009-12-10 | It goes against the flow |
| 2009-09-15 | Hydroelectric facility |
| 2009-09-08 | Lake former, perhaps |
| 2009-05-26 | Beaver's project |
| 2009-04-26 | Reservoir's edge |
| 2008-03-08 | Flow checker |
| 2007-12-31 | Grand Coulee, e.g. |
| 2007-12-10 | River blocker |
| 2007-11-14 | Dental device |
| 2007-01-28 | Water holder |
| 2006-11-22 | Water holder |
| 2006-06-05 | Beaver's work |
| 2006-01-08 | It may get into deep water |
| 2005-09-13 | Hoover, e.g. |
| 2005-08-31 | Public works project |
| 2005-01-30 | Farm mother |
| 2005-01-10 | Hoover ___ |
| 2004-12-25 | Farm female |
| 2004-10-22 | Gatehouse site |
| 2004-10-02 | Fort Peck ___, in Montana |
| 2004-09-13 | Hoover ___ |
| 2004-05-07 | It's water resistant |
| 2004-04-30 | Coolidge or Roosevelt |
| 2004-01-13 | River regulator |
| 2003-11-09 | Public works project |
| 2002-12-01 | Obstruction |
| 2001-11-19 | Beaver's work |
| 2001-10-25 | Obstruct |
| 2001-08-19 | One that's holding back? |
| 2001-07-08 | Electricity source |
| 2001-04-20 | Three Gorges project |
| 2001-01-08 | Grand Coulee, e.g. |
| 2000-01-04 | Beaver's work |
| 1999-12-13 | Beaver's project |
| 1999-11-21 | Fort Peck, for one |
| 1999-07-14 | Hydroelectric project |
| 1999-05-27 | Horse's mother |
| 1999-02-26 | Water gate |
| 1998-12-28 | Hydroelectric project |
| 1998-07-29 | Hydroelectric project |
| 1998-06-01 | Beavers' project |
| 1997-10-14 | Beaver's work |
| 1997-05-11 | Weir |
| 1997-02-16 | Broodmare |
| 1997-02-12 | Hydroelectric project |
| 1996-09-02 | Beavers' project |
| 1996-07-12 | Stop up |
| 1996-06-28 | Glen Canyon___ |
| 1996-04-17 | Block |
| 1996-03-18 | Hoover, e.g. |
| 1995-10-27 | See 1-Down |
| 1995-09-24 | Equine mother |
| 1995-09-15 | Block |
| 1995-08-18 | Flood control |
| 1995-01-08 | Hoover, e.g. |
| 1994-09-18 | Equine mother |
| 1994-05-19 | Leave it to beavers |
| 1994-04-26 | Hoover, for one |
| 1994-03-17 | Sire's mate |
| 1993-12-09 | Hoover, e.g. |