The cache is not at the posted coordinates. You will however find a sign there that will help you find what you seek.
There is a 10 digit phone number on the sign. Use each of the 10 digits to calculate where the cache is located:
N51 (2nd)(3rd).(7th)(9th)(3rd+4th) W114 (1st-10th)(1st).(8th-5th)(9th-4th)(1st)
Ng gur onfr bs n L.