Production:2693

year	DMM	operator	address	production	cumulative	opening	depth	seam	thickness	method	days	emp
1913		Chicago Retort Fire Brick Co.	Ottawa	5,591		slope		#2	2.43		100	11
1914				0
1915				0
1916				2,000			17	#2	2	strip	200	8
1917				5,330				#2	2	strip	240	7
1918				6,000							254	3
1919				5,103							108	4
1920				10,000							120	10
1921				6,400							210	6
1922				0
1923				6,500							203	6
1924				6,000							240	5
1925				6,000							220	4
1925b				0
1926				0
1927				0
1928				4,780						strip	150	3
1929				4,000						strip	100	4
1930				4,000						ug	250	5
1931				3,500						ug	200	4
1932				3,100						strip	60	2
1933				1,400						strip	175	4
1934				2,280						strip	25	2
1935				2,800						strip
1936				6,885						strip	260	5
1937	L-7			6,972						strip	95	2
1938	L-7			4,765						strip	57	9
1939	L-7			4,250						strip	325	12
1940	L-7			5,388						strip	65	11
1941	L-7			7,355						strip	260	18
1942	L-7			8,804						strip	51	17
1943	L-7			8,405						strip	278	18
1944	L-7			3,500						strip	309	11
1945	L-7			5,777						strip	305	15
1946	L-7			7,123						strip	250	15
1947	L-7			9,091						strip	272	5
1948	L-7			7,255						strip	272	5
1949	L-7			6,112						strip	261	5
1950	L-7			3,088						strip	243	5
1951	L-7			2,753	182,307					strip	254	13
1952	L-7	LaClede-Christy Coal Co.		2,388	2,388					strip	246	13
1953	L-7	Chicago Retort & Fire Brick Coal Co.		2,365						strip	257	13
1954	L-7			2,186						strip	242	10
1955	L-7			2,268	6,819					strip	255	10
1956	L-7	LaClede-Christy Co., Div #102		3,203						strip	252	10
1957	L-7			7,345						strip	218	5
1958	L-7			1,324	11,872					strip	84	3
1959	L-7	H. K. Porter Co., Inc.		1,568						strip	33	4
1960	L-7			885	2,453						11	3
					205,839