| Historical Data 1931 - 1977 Bituminous Mines in the United States |
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TABLE 12B. - Count of operations, by general work location,
at bituminous 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 7,633 - 7,633
1949 6,968 - 6,968
1950 6,923 - 6,923
1951 7,792 - 7,792
1952 7,178 - 7,178
1953 6,783 - 6,783
1954 6,270 - 6,270
1955 6,845 - 6,845
1956 7,293 - 7,293
1957 7,078 - 7,078
1958 7,381 - 7,381
1959 7,101 - 7,101
1960 7,392 - 7,392
1961 6,796 - 6,796
1962 6,899 - 6,899
1963 7,082 - 7,082
1964 6,410 - 6,410
1965 6,229 - 6,229
1966 5,243 - 5,243
1967 4,449 - 4,449
1968 3,850 - 3,850
1969 3,450 - 3,450
1970 3,053 - 3,053
1971 2,281 - 2,281
1972 1,534 - 1,534
1973 1,342 - 1,342
1974 1,402 - 1,402
1975 1,633 - 1,633
1976 1,908 - 1,908
1977 2,067 - 2,067
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 1,786 NA - - 1,786 9,419
1949 1,771 NA - - 1,771 8,739
1950 1,894 NA - - 1,894 8,817
1951 1,887 NA - - 1,887 9,679
1952 1,816 NA - - 1,816 8,994
1953 1,827 NA - - 1,827 8,610
1954 1,664 NA - - 1,664 7,934
1955 1,711 120 - - 1,831 8,676
1956 1,740 213 - - 1,953 9,246
1957 1,765 274 - - 2,039 9,117
1958 1,779 299 - - 2,078 9,459
1959 1,676 308 - - 1,984 9,085
1960 1,608 347 - - 1,955 9,347
1961 1,568 327 - - 1,895 8,691
1962 1,540 366 - - 1,906 8,805
1963 1,515 379 - - 1,894 8,976
1964 1,523 408 - - 1,931 8,341
1965 1,582 397 - - 1,979 8,208
1966 1,528 445 - - 1,973 7,216
1967 1,439 440 - - 1,879 6,328
1968 1,490 444 - - 1,934 5,784
1969 1,591 495 - - 2,086 5,536
1970 2,151 650 - - 2,801 5,854
1971 2,278 588 - - 2,866 5,147
1972 1,269 317 1 - 1,587 3,121
1973 1,112 238 - 1 1,351 2,693
1974 1,412 246 - 2 1,660 3,062
1975 1,995 228 7 3 2,233 3,866
1976 2,349 249 9 - 2,607 4,515
1977 2,757 265 12 - 3,034 5,101
1/ Always associated with underground for count.
NA Not available.
Independent Mechanical
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 6,435
1945 NA NA 6,358
1946 NA NA 6,942
1947 NA NA 9,105
1948 NA NA 9,419
1949 NA NA 8,739
1950 NA NA 8,817
1951 NA NA 9,679
1952 NA NA 8,994
1953 NA NA 8,610
1954 NA NA 7,934
1955 NA NA 8,676
1956 NA NA 9,246
1957 NA NA 9,117
1958 NA NA 9,459
1959 NA NA 9,085
1960 NA NA 9,347
1961 NA NA 8,691
1962 NA NA 8,805
1963 NA NA 8,976
1964 NA NA 8,341
1965 NA NA 8,208
1966 NA 458 7,674
1967 NA 434 6,762
1968 NA 439 6,223
1969 NA 439 5,975
1970 NA 442 6,296
1971 NA 491 5,638
1972 35 785 3,941
1973 65 669 3,427
1974 86 697 3,845
1975 94 772 4,732
1976 111 900 5,526
1977 137 1,072 6,310
1/ Always associated with underground for count.
NA Not available.
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