The cache is not at the posted coordinates, but the information you will need to locate the cache is.
Welcome to Veterans Memorial Park in Falls City Texas. It's a nice park that has access to the San Antonio river. Now it also has a cache. The posted coordinates will take you to a large electrical pole that has a vertical tag with a 7 digit number. Plug that number into the Certitude link below to obtain the final coordinates.
You can validate your puzzle solution with
certitude.