The Cache is not at the listed coordinates.
The cache is in a little park not too far away. This park has had a number of caches that have since gone while bgmat has been caching. It is currently empty, so it was time to try placing another cache in this park and see how long it lasts.
The following numbers will help you to find this cache and the lovely little park that it is located in.
918 and 58
Putting the correcct coordinates into the solution checker will update the coordinates.
Enjoy the puzzle, the park and have fun finding the cache.