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This is a decon container and is well-hidden. The whole point of this cache is to bring you here to share the history.
The cache is hidden nearby. The length of the bridge is "abc" feet. Add "a" and "b" together and add that number and the zero to the north coordinates to get the final for the north.
Example: The length of the bridge is 160 feet. Add the 1 and the 6 together to get 7. Add 70 to the 871 at the end of the north coords to get 941 and go get the cache that is hidden nearby.
The final west coordinates are 110 40.029
Thanks "Big E" for helping me with the cache placement.
(No hints available.)