Near this spot used to be a cache named "The Craig Tunnel" by the Cully Crew. Sadly it was deactivated.
Living in the area I think this is a spot a cache has to be. However, due to a rockslide at the original hide it is impossible to reactive the cache exactly at the orignial spot. When you will arrive in the area you will easy see the rock slide.
The coords can jump in this section of the Speyside way, so here some hints to find it. When you see the rockslide next to the left side of the tunnel, turn back to the bridge, can you see the "505"? The cache is behind this number, you may lean over a old wall between the "505" and the rock. The cache can be reached without any risk. It is a small white container, covered with 3 rocks from the rockslide. See spoiler pictures.
Happy Caching.