Production:6794

year	DMM	operator	address	production	cumulative	opening	depth	seam	thickness	method	days	emp
1957	L-231	Big Three Coal Co., No. 3	Cambria	1,735			23	#2	4	surface
1958				2,681			20	#2	7	surface
1959		Pit 3		472	4,888		20	#2	2.75	surface