Blackey Coal Company
 Blackey
 Letcher
 1917-1925
 80

Consolidated Fuel Company
 Blackey
 Letcher
 1921-1930
 100

Consolidated Fuel Company
 Blackey
 Letcher
 1922-1927
 100

Elk Creek Coal Company
 Blackey
 Letcher
 1921-1924
 100

John P. Gorman Coal Company
 Blackey
 Letcher
 1925-1932
 150

Marian Coal Company
 Blackey
 Letcher
 1919-1928
 125

Rockhouse Coal Company
 Blackey
 Letcher
 1919-1929
 135

Red Star Coal Company
 Bluefield
 Letcher
 1937-1940
 40

Ulvah Coal Company
 Bluefield
 Letcher
 1917-1928
 150

Consolidation Coal Company
 Burdine
 Letcher
 1914-1930
 339

Huntington By-Product Coal Company
 Burdine
 Letcher
 1917-1923
 40

Kentucky Eagle Coal Company
 Carbon Glo
 Letcher
 1934-1937
 140

Carbon Glow Coal Company
 Carbon Glow
 Letcher
 1940-1957
 135

Carbon Glow Mines, Inc.
 Carbon Glow
 Letcher
 1928-1933
 275

Elkhorn Coal Corporation
 Cromona
 Letcher
 1935-1950
 295

Elkhorn Coal Corporation, Inc.
 Cromona
 Letcher
 1917-1955
 295

Amburgy Coal Company
 Dalna
 Letcher
 1918-1923
 50

Consolidated Coal Company
 Dalna
 Letcher
 1921-1930
 350

Consolidated Fuel Company
 Dalna
 Letcher
 1921-1930
 350

Letcher Coal Mining Company
 Dalna
 Letcher
 1923-1924
 200

Smoot Creek Coal & Coke Company
 Dalna
 Letcher
 1919-1921
 65

Stafford Coal Company, Inc.
 Dalna
 Letcher
 1924-1924
 35

Caudill Branch Coal Company
 David
 Letcher
 1919-1921
 60

Dudley Coal Company
 David
 Letcher
 1921-1928
 161

Consolidation Coal Company
 Dunham
 Letcher
 1916-1946
 547

Acorn Mining Company
 Elco
 Letcher
 1942-1942
 50

Consolidated Coal Company
 Elsie Coal
 Letcher
 1921-1930
 250

Consolidated Fuel Company
 Elsie Coal
 Letcher
 1922-1927
 250

Letcher Coal Mining Company
 Elsie Coal
 Letcher
 1923-1926
 200

Elkhorn Colleiries Corporation
 Faraday
 Letcher
 1931-1948
 210

Elkhorn Collieries Corporation
 Farraday
 Letcher
 1930-1939
 210

Acme By-Products Coal Company
 Fleming
 Letcher
 1907-1923
 50

Elkhorn By-Product Coal Company
 Fleming
 Letcher
 1917-1921
 20

Elkhorn Coal Corporation
 Fleming
 Letcher
 1935-1950
 485

Elkhorn Coal Corporation, Inc.
 Fleming
 Letcher
 1917-1955
 485

Elkhorn Mining Corporation
 Fleming
 Letcher
 1915-1917
 500

Speaks Brothers Coal Company
 Whitesburg
 Letcher
 1927-1932
 20

Smoot Creek Coal Company
 Whitesburg
 Letcher
 1917-1920
 20

Nagola Elkhorn Coal Company
 Fleming
 Letcher
 1923-1930
 75

Gorman Col Sales Company Mine
 Hot Spot
 Letcher
 1935-1939
 150

Cassell Draper West Coal Company
 Ice
 Letcher
 1917-1919
 20

Cowan Creek Coal Company
 Ice
 Letcher
 1921-1934
 50

Cumberland & Hazard Mining Company
 Ice
 Letcher
 1919-1921
 20

Elkhorn Coal Corporation
 Jackhorn
 Letcher
 1935-1950
 300

Elkhorn Coal Corporation, Inc.
 Jackhorn
 Letcher
 1917-1955
 300

Adamson Coal Company
 Jenkins
 Letcher
 1921-1925
 18

Burdine Coal Company
 Jenkins
 Letcher
 1923-1925
 18

Consolidation Coal Company
 Jenkins
 Letcher
 1912-1946
 780

Elkhorn Collieries Company
 Jenkins
 Letcher
 1917-1921
 50

Elkhorn Coal Company
 Kona
 Letcher
 1924-1925
 77

Elkhorn Coal Company
 Kona
 Letcher
 1932-1958
 177

Dixie Diamond Colliery, Inc.
 Letcher
 Letcher
 1935-1939
 150

Jeanne Francis Coal Company
 Letcher
 Letcher
 1942-1954
 75

Marian Coal Company
 Letcher
 Letcher
 Before 1903
 ?

Elkhorn Coal Company
 Mater
 Letcher
 1915-1931
 177

Cameo Coal Corporation
 Mayking
 Letcher
 1932-1933
 75

Mayking Coal Corporation
 Mayking
 Letcher
 1917-1928
 100

Consolidation Coal Company
 McRoberts
 Letcher
 1918-1946
 787

Apex Coal Company
 Millstone
 Letcher
 1923-1936
 90

South East Coal Company
 Millstone
 Letcher
 1920-1958
 128

Premium Coals, Inc.
 Premium
 Letcher
 1942-1958
 103

Nagola Elkhorn Coal Company
 Seco
 Letcher
 1923-1930
 30

South East Coal Company
 Seco
 Letcher
 1915-1958
 225

Imperial Elkhorn Coal Company
 Sergent
 Letcher
 1921-1928
 200

Puritan Elkhorn Coal Company
 Sergent
 Letcher
 1931-1932
 85

Whitley Elkhorn Coal Company
 Sergent
 Letcher
 1917-1921
 100

Elkhorn Collieries Company, Inc.
 Thornton
 Letcher
 1919-1923
 150

Elkhorn Collieries Corporation
 Thornton
 Letcher
 1924-1930
 210

John P. Gorman Coal Company
 Ulvah
 Letcher
 1925-1932
 25

Whitesburg Coal Company
 Whitco
 Letcher
 1917-1932
 80

Ace Coal Company
 Whitesburg
 Letcher
 1923-1930
 80

Elkhorn-Jellico Coal Company
 Whitesburg
 Letcher
 1922-1950
 180

Elkhorn Hazard Coal Company
 Whitesburg
 Letcher
 1919-1924
 50

Elkhorn & Jellico Coal Company
 Whitesburg
 Letcher
 1919-1958
 180

Sandlick Coal Company
 Whitesburg
 Letcher
 1927-1953
 145