Historical clue formulations

• Sandbar — 2025-10-06
• Wet bar? — 2025-07-13
• Sandbar — 2024-11-16
• Large mass of swimming fish — 2022-05-14
• Sight at low tide — 2021-09-04
• Group of fish — 2020-10-08
• Boating hazard — 2019-10-06
• Submerged ridge — 2019-10-05
• Maritime hazard — 2019-06-20
• Riverboat hazard — 2018-06-03
• Bar that might be dangerous — 2018-04-29
• Boating hazard — 2017-09-13
• Maritime hazard — 2017-05-10
• Sandbar — 2015-05-13
• Sandbank — 2014-04-23
• Nautical hazard — 2013-04-10
• Nautical hazard — 2012-05-30
• Spit, e.g. — 2008-06-06
• Navigation hazard — 2007-10-05
• Sand bar — 2006-03-20
• Underwater sandbank — 2005-07-13
• Keel scraper — 2005-04-23
• River hazard — 2004-04-26
• School of fish — 2001-12-04
• Riverboat danger — 2001-11-11
• Sandbank site — 2001-08-17
• Sandbar — 2000-01-17
• Bar — 1999-09-11
• Sand bar — 1999-05-16
• Sand bar — 1999-04-05
• Sand bar — 1997-03-03
• Sand bar — 1997-01-13
• Sandbank — 1995-08-14
• Sand bar — 1995-03-05