The Historic Environment Officer for the Exmoor Mires Project undertook a non-intrustive walkover survey of the proposed mire restoration area on Deer Park, which included this site. Noted was a constructed causeway around 70 metres long and 5 metres wide, traversing a wet area. The context of its construction is unknown as it extends the line of the mining openwork to the south (MMO602), but could also be associated with the earlier route to Simonsbath (MMO466). [1]