1. OAN field survey, located by GPS to an accuracy of +/- 1m. Square plan brick built tower structure up to 3.5m high. It is partially ruined up to 43 courses high, and is constructed of regular red bricks. The east face of the structure has a water outlet in the form of an arched sluice channel. There is a leat/water culvert running downslope from this towards the Meadow Shaft workings. Internally the structure has a cylindrical brick opening supported by large limestone masonry blocks. Some of these blocks are displaced around the structure suggesting that there could have been a masonry upper level. 2002/10/16/OAN/PJS

2. The National Grid Reference has been moved to the correct position from the erroneous one supplied by OAN. As the structure is the chimney base for the former Zinc Smelter (nprn 416431), there was a substantial 'masonry upper level' - the chimney is shown on historic photographs of the area. The so-called 'water outlet' referred to by OAN in the east face is in fact the flue running up the hillside into the base of the chimney carrying the waste gases from the smelter. Apart from photographic evidence, the structure is shown and clearly annotated 'Chy.' on the Ordnance Survey Third Edition 25in map of 1912.
B.A.Malaws, RCAHMW, October 2007.