Page 53 - 00 Volume 5 The Mine
P. 53

When Kimihia was first mined, between 1890 and 1900, the coal was won by digging underground beneath the
    bed of the Lake. During the Second World War when it was decided to opencast, the Kimihia Lake was drained
    exposing  the  old  underground  mining  caverns  approximately  30  meters  below  what  had  once  been  the  lake
    surface.
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