You will be glad to know that this cache is not hidden at the posted coordinates, since those coordinates are in the Mississippi River. DO NOT go on private land when searching for this cache.
Find bison bug on post, shady trees.
Beautiful park (zero) boundary. Fun says I.
Below is for checking your answer, not for solving the puzzle.
N AA BB.CCC W DD EE.FFF.
AA + DD = 139.
BB + EE = 40.
CCC + FFF = 796.