The following is an A-Z overview of the public knowledge bank. I am including info that is probably most useful here so it can be seen at a glance- ie Access arrangements and suggested equipment. Other categories may be added if requested/ prove to be useful.
Full details are of course available on each sites individual listing.

Site	Access	Suggested equipment	Approx location Click for map
A
.
Aber Mine	open	none
.
Aberglaslyn Adit	open	none
.
Aberglaslyn Mine	Unknown- open	SRT
.
Afon Meirchion Cave (Lower)	Open	none
.
Afon Meirchion Cave (upper)	open	none
.
Anglesey's Sea Caves	open	none
.
B
.
Bala Mine	open	none
.
Belgrave Mine	open	none-SRT optional
.
Benglog Copper Mine	Collapsed	none
.
Betws Garmon Mine	open	none
.
Big Covert Cave	open	none
.
Brasgyll Caves	Landowner permisson	SRT/ electrons- site dependant
.
Britannia Mine (Snowdon)	Some open some not	none
.
Bryn Celyn Adit	open	none
.
Bryn Felin Mine	open	none- SRT for shaft
.
Bryn Glas Mine, Llan Ffestiniog	open	none
.
Bryn Nantllech Adits	open	none
.
Burley Hill Adit	partly blocked	none
.
Bwlch y Plwm Mine	open	None-SRT optional
.
C
.
Cabin Shaft (Minera)	open	Eletron/SRT
.
Cae Coch Sulphur Mine	open	none
.
Cae'r Defaid Mine	open	none (dingy/wetsuit for deep drainage)
.
Caerwys Caves	landowner permission	none
.
Cambrian Slate Mine (Glyn Ceiriog)	open	none
.
Castell Cawr Caves	some open some locked	none
.
Castell Garndochan Gold Mine
.
Cefn Caves	Landowner permission	none
.
Cefn Coch Gold Mine	some open some collapsed some locked	none/ SRT for some
.
Chwarel Gethin Jones	open	none
.
Chwarel llew Twrog	open	none
.
Cilcain Bridge Rising	open	diving gear
.
Cloddfa Gwanas Mine (Mid Wales)	open	none
.
Clogwyn y Fuwch Mine (Conway Valley)	open	none
.
Coed Mawr Mine	open	SRT/electron
.
Coed Mawr Pool Deep Adit	open- NRW land	none (boat)
.
Coed Nant Gain Caves	landowner permission	none
.
Conglog Mine	open	None SRT optional
.
Conwy Mine	open	none
.
Corsham Bathstone Quarries	Unknown	unknown
.
cribb ddu mine	Unknown (open)	Unknown (none)
.
Croesor Rhosydd	open	LOTS!
.
Cwm Bychan Mine	open	none
.
Cwm Cynfal Copper Mine	open	SRT
.
Cwm Mine (St. Asaph)	open	wetsuit
.
Cwmfron Mine	landowners permission	none
.
Cwmorthin Alleged Gold Trials	open	none
.
Cwmorthin Mine	combo locked- code availible	none SRT optional
.
Cwt-y-Bugail (old) Quarry	beleieved to be open	SRT in places
.
Cyffty Mine	No underground access	none
.
D
.
Denbigh Castle Cave	open	none
.
http://ucet.org.uk/~ucet9504/index.php/forum/21-knowledge-bank/745-devil-s-gorge-caves]Devil's Gorge Caves	open (one locked)	none
.
Devil's Gorge Mines	open	none
.
Dolben Mine	open	none
.
Drws y Coed Mine	open	none
.
Dylife Mine	open	none
.
Dyserth Castle Cave	open	none
.
Dyserth Waterfall Mine	permission required	none
.
E
.
F
.
Figra Gold Mine	open	none /SRT/electrons
.
Fish Mine	open	none- SRT optional
.
Foel Gron Mine	open	none
.
Foel Ispri Gold Trial	locked	none
.
Fron-boeth, slate mine	open	none- SRT optional
.
G
.
[url=http://ucet.org.uk/~ucet9504/index.php/forum/21-knowledge-bank/791-garegog- mine]Garegog Mine[/url]	open	Electron
.
Geirionydd Mine (Trefriw)	open	none
.
Geirionydd Shafts (Trefriw)	open	none (handline if desired)
.
Gerdden Isa Adit	open	none
.
Gold Mine - Name Unknown	open	none
.
Gold Mine - Name Unknown (2)	open	none
.
Gop Caves	open	none
.
Gors mine	open	none
.
Grand Turk Passage	open	SRT/Electrons
.
Great Orme Bronze Age Mines	open	none
.
Great Orme Cave (Bears Cave)	open	none
.
Great Orme Cave (Elephant's Cave)	open	none
.
Great Orme Cave (Sheep Cave)	open	none
.
Great Orme Sea Caves	open	none
.
Gwaenysgor Cave	open	None
.
Gwaenysgor Mine	open	none
.
Gwyrch Castle Adit	Unknown permission may be required	none
.
H
.
[url=http://ucet.org.uk/~ucet9504/index.php/forum/21-knowledge-bank/1568-hafod-boeth-lead- mine]Hafod Boeth Lead Mine[/url]	Open	none
.
Hafod Y Llan Mine	Unknown (open)	unkown (none)
.
Hafod Y Porth Mine	open	none
.
Hendre Ddu Mine	open	none
.
Henfwlch Mixed Mine	open	none SRT optional
.
Holme Bank Chert Mine	Landowner permission BCA insurance + donation	none
.
Holy Island Caves	open	none
.
Holywell Shafts (1)	Unknown- may be accessible	electron/SRT
.
Holywell Shafts (2)	open	none
.
I
.
J
.
K
.
Klondyke Lead Mine	open	none
.
L
.
Lady Bagot's Cave	open	none
.
Lady Bagot's Mine	open	none
.
Little Orme Caves	open	none
.
Llanelltyd / Foel Ispri Mine	some open some locked	none
.
Llanfair TH Mine	open	none
.
Llanfairfechan Mine	open	none
.
Llanfwrog Woods Mine	open	none
.
Llanrwst Mine	open	none
.
Llanymynech Cave & Roman Mine	open	none
.
Lliwedd Mine	open	none SRT optional
.
Llyn y Pandy Adit	open	none
.
Llynau Gamallt Mine	open	none
.
M
.
Menai Straits Adit	open	none
.
Millenium Pot	open	none
.
Minera Mountain Shakeholes	open	SRT/electron
.
Minllyd Mine	open	none- SRT optionsl
.
Moel Fferna Mine	open	SRT/Electron
.
Moel Hebog Mine	open	none
.
Moel Mochowgryn Mine	open	none
.
Moelwyn Zinc Mine	Some sealed,some open	none/ SRT optional
.
Murphy's Pot	Locked- contact UCET	none
.
N
.
.
Nadolig Mine #1 (Cilcain)	open	none
.
Nadolig Shaft #1 (Cilcain)	open	SRT
.
Nadolig Shaft #2 (Cilcain)	open	SRT
.
Nant Manganese Mine	open	none
.
O
.
Ochr y Craig Mine	open	none
.
Ogof Hen Ffynnonau (Poachers Cave)	open	electron
.
Ogof Hesp Alyn	open	Electrons and SRT
.
Ogof Nadolig (Christmas Cave)	open	none (electron optional)
.
Old Man Mine / Moss Head Slate Quarry	open	none SRT optional
.
Orange Leete Level	open	unknown
.
P
.
Penarth Mine	open	none
.
Pengwern Mine	open	none (some parts inaccessible)
.
Penyffridd Slate Mine	open	none
.
Porth Nannerch Quarry Mine	open	none for one electron for other
.
Portmeirion Caves	open	none
.
Prince Edward Gold Mine	open	none
.
Prince of Wales Gold Mine	Open some sealed	none
.
[url=http://ucet.org.uk/~ucet9504/index.php/forum/21-knowledge-bank/920-pwll-glas- mine]Pwll Glas Mine[/url]	open	none
.
Q
.
R
.
Red Dragon Mine	open	none
.
Rhewl Cave (Prion)	open	none
.
Rhiw Bach Mine	Landowner permission	None
.
Rhiw Crown Manganese Mine	open (shaft)	SRT
.
Rhiwbach New Vein quarry adit	open	waders
.
Rhosydd Mine	open	none
.
Rhuallt Mine #1	open	SRT
.
Rhuallt Mine #2	collapsed	JCB
.
Rhuallt Mine #3	open	SRT/Electron
.
Rhydymain Adit	open	dingy/wetsuit for lower workings/drainage
.
S
.
Siamber Wen (Sink)	Unknown- private land	none
.
Smallclough Lead mine
.
Soot Shaft	Landowner permission	SRT, multiple electrons
.
Spar Mine (Hendre)	landowner permission	None (SRT optional)
.
Sygun Copper Mine (Show Mine)	entry fee (show mine)	none
.
Sygun Mines	open	none
.
T
.
Tal y bont Mines (1)	open	none (SRT optional)
.
Tal y bont Mines (2)	open	unknown
.
Tal y bont Mines (3)	open	SRT
.
Tal y bont Mines (4)	unknown	unknown
.
Tan y Ogof Caves	open	none
.
Trecastell Mine	open	wetsuit
.
Trevor Hall cave	open	none
.
Tyllau Mwn Mine	open	none
.
Ty'n-y-ffridd Slate Mine	open	none
.
U
.
V
.
W
.
Wedding Cave Mine	open	none
.
West Mine (Alderley Edge)	Access via DCC	none SRT optional
.
White Quarry Caves	open	none
.
Wood, Copper Mine	Access via DCC	none
.
Wrysgan Mine	open	none (SRT/cowstails optional)
.
X
.
Y
.
Z

Access
Open:- Entrances may be gated but are unlocked or passible It is assumed that no specific permissions are required for access.


Suggested equiptment
None:- indicates no equiptment other than basic caving gear required.

Thats all folks!