UNITED STATES
DEPARTMENT OF LABOR
DEPARTMENT OF LABOR
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. |