The other contender is the South Crofty tin mine in Cornwall, England. The present mine property takes in what were formerly separate properties. It is probably true to say that mining on one or more of these properties has been almost continuous for something approaching 300 years. (See Cornwall’s Central Mines, two volumes, also by T. A. Morrison, published by and available through Alison Hodge, Bosulval, Newmill, Penzance, Cornwall, TR20 8XA, England.)
There might be other contenders in either Sweden or Hungary. Of course if Orisazawa has been in continuous operation for 1,200 years, that puts the others in the shade. Tom Morrison, P. Eng., President, Hardrock Engineering, Vancouver, B.C.
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