Historical clue formulations

• Superior and Victoria, for two — 2024-01-01
• Minnesota has more than 10,000 of them — 2023-06-27
• Subject of a Minnesota state nickname — 2017-10-28
• Land of 10,000 ___ (Minnesota) — 2015-07-06
• Places to go fishing — 2014-06-10
• They have large basins — 2010-04-17
• Great ___ — 2010-01-15
• Finger ___ — 2006-11-04
• Finger ___ — 2005-10-20
• Limnologists study them — 2001-09-28
• Dams make them — 2001-01-22
• Finger ___ — 1999-12-11
• Finger ___ — 1999-09-26
• Aral and Caspian Seas, really — 1997-02-18