Cache is not at posted coordinates, you will need to use information obtained from a plaque at stage one. Bring your own calculator.
Coordinates will end up in as AB CD.EFG for north, and HIJ KL.MNO for south.
A) Last number in the year this bridge was built
B) Third number after the second word.
C) First number after the second word
D) Number of letters in the first word minus one
E) Last number after the second word plus one
F) First number in the year
G) Number of letters in the second word
H) First number after the second word
I) Number of letters in the first word
J) Last digit in the year minus one
K) How many words are on the top line?
L) Number of letters in the second word plus one
M) Number of letters in that same second word
N) If you were to subtract the two strings of numbers on this sign, what would the last digit be? Add two to that.
O) Second (and third) number in year.
Because some have had issues with my multi's in the past, I am including a checker although it's very much unneeded.
You can validate your puzzle solution with certitude.