| Historical Data 1931 - 1977 All Coal Mines in the United States |
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TABLE 12. - Count of operations, by general work location, at all coal
mines in the United States, 1931-77
Underground mines Total
Year underground
Underground Surface mining
1931 NA NA NA
1932 NA NA NA
1933 NA NA NA
1934 NA NA NA
1935 NA NA NA
1936 NA NA NA
1937 NA NA NA
1938 NA NA NA
1939 NA NA NA
1940 NA NA NA
1941 NA NA NA
1942 NA NA NA
1943 NA NA NA
1944 NA NA NA
1945 NA NA NA
1946 NA NA NA
1947 NA NA NA
1948 8,044 - 8,044
1949 7,322 - 7,322
1950 7,269 - 7,269
1951 8,168 - 8,168
1952 7,549 - 7,549
1953 7,126 - 7,126
1954 6,559 - 6,559
1955 8,181 - 8,181
1956 8,547 - 8,547
1957 8,337 - 8,337
1958 8,561 - 8,561
1959 8,214 - 8,214
1960 8,447 - 8,447
1961 7,854 - 7,854
1962 7,848 - 7,848
1963 7,916 - 7,916
1964 7,135 - 7,135
1965 6,866 - 6,866
1966 5,675 - 5,675
1967 4,734 - 4,734
1968 4,100 - 4,100
1969 3,647 - 3,647
1970 3,256 - 3,256
1971 2,435 - 2,435
1972 1,606 - 1,606
1973 1,394 - 1,394
1974 1,448 - 1,448
1975 1,702 - 1,702
1976 1,992 - 1,992
1977 2,144 - 2,144
1/ Always associated with underground for count.
NA Not available.
Total
Year Strip Auger Culm Dredges surface Total
banks mining mining
1931 NA NA NA NA NA NA
1932 NA NA NA NA NA NA
1933 NA NA NA NA NA NA
1934 NA NA NA NA NA NA
1935 NA NA NA NA NA NA
1936 NA NA NA NA NA NA
1937 NA NA NA NA NA NA
1938 NA NA NA NA NA NA
1939 NA NA NA NA NA NA
1940 NA NA NA NA NA NA
1941 NA NA NA NA NA NA
1942 NA NA NA NA NA NA
1943 NA NA NA NA NA NA
1944 NA NA NA NA NA NA
1945 NA NA NA NA NA NA
1946 NA NA NA NA NA NA
1947 NA NA NA NA NA NA
1948 1,951 NA 72 42 2,065 10,109
1949 1,915 NA 61 33 2,009 9,331
1950 2,060 NA 32 11 2,103 9,372
1951 2,060 NA 30 15 2,105 10,273
1952 1,973 NA 27 15 2,015 9,564
1953 1,986 NA 36 11 2,033 9,159
1954 1,792 NA 28 6 1,826 8,385
1955 1,848 120 25 8 2,001 10,182
1956 1,897 213 74 23 2,207 10,754
1957 1,943 274 87 18 2,322 10,659
1958 1,968 299 131 21 2,419 10,980
1959 1,851 308 132 25 2,316 10,530
1960 1,782 347 110 26 2,265 10,712
1961 1,744 327 114 21 2,206 10,060
1962 1,725 366 111 20 2,222 10,070
1963 1,715 379 112 15 2,221 10,137
1964 1,728 408 110 12 2,258 9,393
1965 1,770 397 104 14 2,285 9,151
1966 1,684 445 104 10 2,243 7,918
1967 1,591 440 114 6 2,151 6,885
1968 1,642 444 129 7 2,222 6,322
1969 1,715 495 93 5 2,308 5,955
1970 2,292 650 113 5 3,060 6,316
1971 2,456 588 81 5 3,130 5,565
1972 1,367 317 44 2 1,730 3,336
1973 1,184 238 36 2 1,460 2,854
1974 1,482 246 42 3 1,773 3,221
1975 2,074 228 60 5 2,367 4,069
1976 2,444 249 72 2 2,767 4,759
1977 2,847 265 62 2 3,176 5,320
1/ Always associated with underground for count.
NA Not available.
IndependentMechanical
Year shops and cleaning Grand
yards plants total
1931 NA NA 5,652
1932 NA NA 5,473
1933 NA NA 5,629
1934 NA NA 6,290
1935 NA NA 6,332
1936 NA NA 6,572
1937 NA NA 6,537
1938 NA NA 6,531
1939 NA NA 7,274
1940 NA NA 7,192
1941 NA NA 7,401
1942 NA NA 6,940
1943 NA NA 6,490
1944 NA NA 7,021
1945 NA NA 6,992
1946 NA NA 7,607
1947 NA NA 9,852
1948 NA NA 10,109
1949 NA NA 9,331
1950 NA NA 9,372
1951 NA NA 10,273
1952 NA NA 9,564
1953 NA NA 9,159
1954 NA NA 8,385
1955 NA NA 10,182
1956 NA NA 10,754
1957 NA NA 10,659
1958 NA NA 10,980
1959 NA NA 10,530
1960 NA NA 10,712
1961 NA NA 10,060
1962 NA NA 10,070
1963 NA NA 10,137
1964 NA NA 9,393
1965 NA NA 9,151
1966 NA 603 8,521
1967 NA 569 7,454
1968 NA 565 6,887
1969 NA 550 6,505
1970 NA 544 6,860
1971 NA 567 6,132
1972 37 872 4,245
1973 71 736 3,661
1974 94 767 4,082
1975 100 836 5,005
1976 116 976 5,851
1977 142 1,155 6,617
1/ Always associated with underground for count.
NA Not available.
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