Here is a list of the mines that form the North Wales Mines Inspections Scheme for the LCMLA. Please report any changes to access or concerns with venues so this list can be kept current. All sites in bold are currently used with the scheme, greyed out sites are historic and listed here for reference only.
Category Description
Last Updated: May 2019
For a full description see the accompanying notes by clicking here
Category 1: Simple, structurally sound site that would normally only need one inspection. Re-inspection on request
Category 2: Relatively simple/structurally sound site that may contain some mine hazards. Re-inspection by arrangement. Requires monitoring by users.
Category 3: Complex site. Requires periodic inspection by a mining engineer, typically once a year or every other year. Constant monitoring by centre staff. Any changes to be reported through the mine’s inspection scheme either through this website (click here) or if registered with the scheme by email to minereports@googlegroups.com
Category 4: Unsuitable for group use
| SITE | NGR | CAT. | LAST INSPECTED | NEXT INSPECTION | REMARKS |
| Aberllefenni (Crane Adit) | 3 | Apr 2018 | Pending access | New ownership (2018) No access | |
| Aberllyn (lead) | SH795581 | 4 | May 2008 | On request/ change | Staff training only. |
| Bishop Goodman Quarry Tunnel | SH 56776 60364 | 2 | Apr 2017 | On request/ change | Slate quarry tunnels. (Quarries not inspected) |
| Brynglas (slate) | SH732423 | 3 | Sept 2003 | Needed prior to use | No record of use. |
| Bwlch-y-Plwm (lead) | SH624412 | 3 | Apr 2019 | Apr 2020 | Annual Inspection |
| Cambrian (slate) | SJ189378 | 3 | May 2008 | – | Staff training only |
| Cefn Coch Adit | SH719233 | 2 | April 2010 | – | Access unknown. National Trust use |
| Conlog (slate) | SH670467 | 4 | May 2009 | Deteriorating. Withdrawn | |
| Croesor Adit (slate) | SH657457 | 2 | March 1996 | On request/ change | No record of use |
| Cwmbychan/ Aberglaslyn Gorge (copper) | SH602472 | 2 | April 2014 | On request/ change | Re-inspection on request |
| Cwmorthin (slate) | SH683464 | 3 | Apr 2019 | Apr 2020 | Access managed by Go-Below. Some areas limited to Go-Below groups only |
| Cwmorthin Floor 4 (slate) | SH680640 | 2 | April 2016 | On request/ change | Access arrangement through Go Below. |
| Cwt-y-Bugail (slate) | SH734470 | 3 | Dec 1995 | Unsuitable | Withdrawn from use |
| Dinorwic Tunnels | Various (see report) | 2 | Apr 2016 | On request/ change | |
| Dolgoch Adit (slate) | SH654043 | 2 | Apr 2010 | On request/ change | 2 accessible adits (2 gated for bats) |
| “Fish Caves” (lead) | SJ068813 | 3 | Apr 2019 | Apr 2021 | Vertical trip |
| Gaewern (slate) | SH745086 | 3 | Apr 2018 | Apr 2019 | Withdrawn due to no access (2019) |
| Henddol (slate) | SH619122 | 3 | Apr 2018 | Apr 2020 | Access arrangement with Pro-Active |
| Klondyke (trial) | SH765622 | 2 | Dec 1995 | Gated. No Access | |
| Geironydd Adits (Bryn Cenhadon) | Various | 2 | Apr 2017 | Apr 2020 | 3 year inspection |
| Llanymynech Ogof (copper) | SJ266288 | 2 | Apr 2016 | On request/ change | Re-inspection on request |
| Minllyn (slate) | SH852139 | 3 | Apr 2019 | Apr 2021 | 2 yearly inspection |
| Moelferna (slate) | SJ125399 | 4 | March 1999 | Staff training only | |
| Pandora (lead) | SH767601 | 3 | April 2011 | No access agreement | |
| Parc (lead)
Level 3 |
SH787603 | 3 | May 2008 | Needed prior to use | No up to date report due to collapsed entrance |
| Parc (lead)
Level 2 |
SH 78770 60150 | April 2016 | Staff training only. Access via CAL | ||
| Penrhyngwyn (slate) | SH704419 | 3 | April 2014 | Access issue, no valid inspection | |
| Penarth (slate) | SJ107424 | 4 | May 2008 | Staff training only | |
| Rhiwbach (slate) | SH746476 | 3 | Apr 2019 | Apr 2020 | Annual inspection. Access through CAL |
| Rhosydd Adit 9 (slate) | SH665462 | 2 | May 2009 | No record of use | |
| Talargoch (Meliden) | SH059805 | 3 | Apr 2015 | No updated report due to access | |
| Waunfawr Tunnel | SH555604 | 4 | Sept 2003 | Unsuitable | |
| Wynne (slate) | SJ199379 | 2 | Jan 1997 | Withdrawn 2012 | |
| Wrysgan (slate) | SH675469 | 3 | Apr 2019 | Apr 2020 | Annual inspection |
