This area used to contain Clutton Station, which was both a passenger and a goods station. It was here that the mining trucks from a local colliery rolled down under gravity to be loaded on to the main line for distribution across the south west.
You are looking for a standard micro cache hidden below eye level, and you will need to bring a pencil.
It is rumoured that a troll lives under this brick bridge, but you should be safe if you stay on top and don't make too much noise.