Space Communications Antenna
This is a very short multi-cache, the coordinates of the first stage will place you in front of a Space Communications Antenna from the UW Space Sciences and Engineering Center. There is a sign explaining what this antenna is about, read it, and compute the final coordinates.
Final coordinates are N 43° 04.XXX W 089° 24.YYY with:
XXX = 5 x (diameter of antenna in feet) + 2 x (diameter of antenna in meters) - 2
YYY = 9 x (diameter of antenna in feet) - 1