At the posted coordinates you will see a large sign. The eight largest words on the sign will give you what you need to know to find the cache to sign.
3-5 is the third word, fifth letter and 8-6 is the eighth word, sixth letter.
3-5, 8-6, 4-2, 4-1, 2-2, 6-3, 8-6, 4-5, 1-4, 2-5, 6-2, 1-7, 4-4, 8-6, 8-9, 6-5, 3-4, 1-8, 7-6
NOTE: This cache is available for adoption.