Wisconsin is made up of 72 counties, this cache is focused on Pierce county. Pierce County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 41,019. Its county seat is Ellsworth. Pierce County is part of the Minneapolis–St. Paul–Bloomington, MN-WI Metropolitan Statistical Area. Here are a few stats about Pierce County, courtesy of Wikipedia. You can learn more about Pierce county at: https://en.wikipedia.org/wiki/Pierce_County,_Wisconsin
This county's oldest geocache is GC424A Steel and Stone, placed by Yellow Jacket.
You will find this cache at N44 36.ABC W90 02.DEF
A: "What are the numbers on the Geodetic Bench Mark that is beside the large Steel barrel?"
B: There are 1B sq mi of water in this county.
C: This county was founded in 1C53.
D: The population density is D1/sq mi.
E: The county's oldest geocache is GC4E4A.
F: As of the 2010 census, the population was 41,F19.
SOURCE: Most of the information on this page was obtained from Wikipedia's page about this Wisconsin county.
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CHECK SUM: A+B+C=18 D+E+F=9