Given the extensive later mining operations, any surviving structural remains are minimal, with the main Pen-y-bryn Shaft now encompassed within Wimpey Quarry. The specific features of the Vron Mining Company’s workings in Coed-y-fron Woods remain largely undocumented, though evidence may exist in the form of old shafts and spoil heaps within the woodland. The broader area retains geological significance due to its association with the Milwr Vein and its related cross-courses.

Early 18th-century mining in this area was operated by the Quaker Company. The Vron Mining Company later worked in conjunction with the Pen-y-bryn sett, with recorded activity between 1871 and 1886. The larger Pen-y-bryn Mine, which operated during the 19th century and submitted returns at the same NGR as recorded in Burt et al. (1992), was later worked by the New North Halkyn Mining Company. The Pen-y-bryn Shaft of this company, along with later workings by the Halkyn District United Mines Company, is now located within the Wimpey Quarry at SJ 2030 7070. The Holywell Pen-y-bryn Mine focused on the Caleb Bell cross-course of the Milwr Vein as it traversed the limestone hill of Pen-y-Bryn. The Vron Mining Company likely worked the area around Coed-y-fron Woods. Later 19th-century mining activity has largely obliterated evidence of these earlier workings. The sett was drained by the Deep Level Tunnel.