This Letterbox IS located at the posted coordinates. The container was taken from GCAVGEX - Letterbox seed cache with the intention to help bring the Letterbox Hybrid type of cache back into style in this area. I hope the transplant of this ready-made container helps that cause. Remember to leave the stamp/inkpad for others to enjoy this type of hide.
This area can be a muggle-active (hence, the difficulty rating), so use discretion when you seek it. Permission for the hide location is approved by Cedar Rapids Parks and Recreation.