Mark,
Precise dates are always a problem (first sod cut, seam cut, first coal cut,
mine opened, last coal cut, abandonment), but the following might help:-
Gascoigne Wood Driving began in 1977 - not a production unit.
Wistow Sinking began in 1977 and production began 27/06/1983, but
the mine opened on 04/07/1983.
Whitemoor Sinking began in 1977 and production began Jan 1988.
Riccall Sinking began in 1978 and production began Jan 1988.
Stillingfleet Sinking began in 1978 and production began Jan 1988.
North Selby Sinking began in 1978 and merged with Stillingfleet
in 1999.
On my previous list I did not mention Thorne - which although having been in
'mothballs' since it closed in December 1956 is only just being prepared for
abandonment.
Mike
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