Corn Mill at Felin Gafnan

The Corn Mill at Felin Gafnan is a two-storey overshot watermill, accompanied by a single-storey mill store that is set at a lower level. The mill features rubble walls topped with roofs made of small slates that are partially grouted. The entrance to the mill is located on the right side of the west gable wall and consists of a boarded door with a segmentally-arched rubble voussoir head. There is a narrow window in the center of the gable on the first floor, which is a pointed arch opening made with gritstone voussoirs, re-used from a composite millstone, and includes a drip course. Additionally, a small rectangular window is set under the eaves on the left (north) wall. An old millstone serves as the threshold to the mill. The waterwheel is situated at the east gable end and is in poor condition, with a rotted wheelshaft, buckets, and sole boards. The mill operated with water flowing over the top of the wheel (overshot), but this was diverted under the wheel when not in use. The attached mill store has a doorway on the right, at the angle with the main mill building, and a single ventilation slit at the apex of the west gable.

Inside, the mill has two storeys with one pair of stones located on the first floor. The internal machinery is complete and dates from the same period, likely the 1840s. Notable local features include the carrying over of the teeth on the periphery of the spur wheel onto the upper face, allowing a layshaft to be driven to activate the hoist and ancillary machines. The downstream runner stone is of a composite structure similar to that used in the arched lintel of the west gable wall, while the upstream runner stone is a standard French burrstone, which has lost its maker's plate. The interior also includes a cobble floor and timber hayracks for storage.