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 2022
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 |
| Aberllyn No. 6 Level | SH795578 | 3 | April 2022 | On request/ change | New venue pending access agreement |
| 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 2023 | Apr 2024 | 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 Withdrawn | |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 2023 | Apr 2024 | Access managed by Go-Below. Some areas limited to Go-Below groups only |
| Cwmorthin Floor 4 (slate) | SH680640 | 2 | April 2022 | April 2024 | 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| Cwt-y-Bugail (slate) | SH734470 | 3 | Dec 1995 | Unsuitable | Withdrawn from use |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 | 4 adits one with bats |
| “Fish Caves” (lead) | SJ068813 | 3 | Apr 2023 | Apr 2025 | Vertical trip |
| Gaewern (slate) | SH745086 | 3 | Apr 2018 | Needed | No access agreement |
| Henddol (slate) | SH619122 | 3 | Apr 2022 | Apr 2024 | Access arrangement with Pro-Active |
| Klondyke (trial) | SH765622 | 2 | Dec 1995 | Gated. No Access | |
| Geironydd Adits (Bryn Cenhadon) | Various | 2 | Apr 2020 | On request/ change | Re-inspection on request |
| Llanymynech Ogof (copper) | SJ266288 | 2 | Apr 2021 | On request/ change | Re-inspection on request |
| Minllyn (slate) | SH852139 | 3 | Apr 2023 | Apr 2025 | 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 | ||
| 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 2023 | Apr 24 | Permit needed (click here) |
| Rhosydd Adit 9 (slate) | SH665462 | 2 | May 2009 | No record of use | |
| Talargoch (Meliden) | SH059805 | 3 | Apr 2015 | No updated report due to access | |
| Wedding Cave | SJ 266540 | 2 | April 21 | On request/ change | Re-inspection on request |
| Waunfawr Tunnel | SH555604 | 4 | Sept 2003 | Unsuitable | |
| Wynne (slate) | SJ199379 | 2 | Jan 1997 | Withdrawn 2012 | |
| Wrysgan (slate) | SH675469 | 3 | Apr 2023 | Apr 2024 | Annual inspection |