Historical clue formulations

• Units of concrete — 2025-09-23
• Big hunks — 2019-06-26
• Big, thick slices — 2015-01-19
• Large amounts of bacon — 2012-11-26
• Hearty helpings of meat loaf, say — 2010-07-07
• Hunks of concrete — 2008-09-01
• Hearty slices — 2007-05-29
• Thick chunks — 2006-05-08
• Chunks — 2003-12-05
• Pitchers' rubbers — 2001-10-13
• Generous helpings — 1998-05-12
• Sidewalk sections — 1995-07-22
• Road parts — 1994-11-27