You can approach and should approach from the west on Old 40 Highway. The cache is an easy find, please place it back in its original location as this area does flood.
Many years ago, before Interstate 35W or what is now Interstate 135 came through, this road was US 40 highway. You are looking for a cheap imitation of a real life ammocan. Originally stocked with a couple of pencils, a notebook, and some Hot Wheels for the kids to scrounge through.