Shaft and adits. Park Adit Level also draSpoil heaps from mining activities extend eastward from the shaft at SJ 2785 5085. The site also includes an adit level with a well-preserved portal at SJ 2650 5508, along with the Park Adit Level at SJ 2710 5160, which was used for drainage. The mine was connected to the mineral railway for transport.

Several structural remnants are still visible today. Substantial stone walls from the engine house and processing buildings survive beneath layers of debris. A former pond bed, which supplied water to processing areas, remains at SJ 2785 5082. Machinery for crushing and processing ore was once operational on-site, and two rectangular building foundations can still be found at SJ 2785 5083.

New Minera Shaft, which operated from 1889 into the early 20th century, relied on multiple steam engines powering various equipment, including a winder, pumps, compressors, sawmill crushers, and ore dressing machinery. An innovative vanning machine, designed by company engineer George Frederick Wynne, was introduced here for separating fine ore particles from waste—a technique that later gained international use. The site contains extensive remains, including a capped shaft, buddles, jig boxes, engine bases, and structures linked to the vanning machinery. Notably, some timber structures, such as launders and processing boxes, are exceptionally well preserved.

Burton’s Shaft was excavated through Cefn-y-fedw Sandstone and Coal Measures, cutting into the underlying Carboniferous Limestone. Mining activity in the area was undertaken by the New Minera Mining Company, which briefly operated east of Nant Farm at SJ 2771 5085. The company commenced work in 1888, focusing on veins southeast of Meadow Shaft, but financial difficulties led to its liquidation in 1896.

The New Minera or Burton’s Shaft, located at SJ 2785 5085, reached a depth of 966 feet and targeted the Red Vein and Main Vein. Following the company’s collapse, it merged with the Minera Mining Company in 1897, forming the United Minera Mining Company. The last recorded operations at Burton’s Shaft took place in 1919 (Earp, 1958).

Burton’s Shaft and its surrounding industrial remains were officially scheduled for preservation by Cadw in 1997