Iowa Counties in a day Challenge Mystery Cache

This is a challenge cache. To log the find you must have found caches in at least 16 counties in Iowa in one day.  Any type of cache qualifies but please include only those that you found the cache and signed log or completed virtual or earth cache requirements (no throw downs).

Document in any way you see fit, GSAK screen shot is great , or if it is already in your profile page, just direct me to look there for proof.

Final is a bison tube - rated a 1.5/2.0. 

Our example from GSAK

Most Counties in a day:16 (Tama : Iowa, Grundy : Iowa, Butler : Iowa, Black Hawk : Iowa, Bremer : Iowa, Chickasaw : Iowa, Floyd : Iowa, Mitchell : Iowa, Howard : Iowa, Winneshiek : Iowa, Clayton : Iowa, Allamakee : Iowa, Fayette : Iowa, Buchanan : Iowa, Delaware : Iowa, Dubuque : Iowa) on 07/21/2012 Note: includes locationless caches.