| Historical Data 1931 - 1977 Bituminous Coal Mines in the United States |
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TABLE 6B. - Nonfatal disabling injury-frequency rates per million man-hours,
by general work location, by general work location, at bituminous
coal mines in the United States, 1931-77
Underground mines Total
Year underground
Underground Surface mining
1931 85.34 40.45 80.18
1932 76.94 40.10 72.35
1933 73.11 37.50 68.52
1934 73.56 40.00 69.27
1935 76.36 38.27 71.59
1936 70.34 30.56 65.33
1937 72.47 35.54 67.94
1938 68.51 28.83 63.46
1939 64.51 33.05 60.52
1940 65.25 33.82 61.30
1941 63.62 30.26 59.32
1942 65.92 29.78 60.97
1943 62.85 35.60 58.76
1944 61.48 35.46 57.23
1945 62.52 35.24 57.93
1946 65.36 38.70 60.88
1947 63.71 36.67 59.24
1948 62.56 37.64 58.35
1949 58.26 32.76 53.90
1950 53.83 30.20 49.73
1951 53.19 29.65 49.15
1952 54.08 29.91 49.89
1953 51.59 26.70 47.20
1954 50.05 26.16 45.59
1955 49.75 27.19 45.52
1956 50.27 26.54 45.83
1957 51.00 27.57 46.59
1958 50.09 26.32 45.47
1959 47.43 23.89 42.71
1960 48.84 26.72 44.41
1961 51.19 28.47 46.61
1962 52.45 27.56 47.41
1963 51.39 28.51 46.78
1964 50.52 27.29 46.04
1965 51.96 28.24 47.47
1966 49.98 31.73 47.50
1967 49.49 30.27 47.07
1968 48.82 30.92 46.70
1969 51.06 26.90 48.41
1970 53.80 32.66 51.62
1971 57.51 41.44 55.75
1972 57.45 32.48 55.20
1973 51.13 23.17 48.65
1974 36.25 21.05 34.82
1975 38.78 22.11 37.11
1976 48.89 30.65 47.09
1977 53.14 30.32 50.75
NA Not available.
Total
Year Strip Auger Culm Dredges surface Total
banks mining mining
1931 65.27 NA NA NA 65.27 79.98
1932 86.53 NA NA NA 86.53 72.58
1933 92.18 NA NA NA 92.18 68.87
1934 77.57 NA NA NA 77.57 69.39
1935 64.23 NA NA NA 64.23 71.47
1936 79.82 NA NA - 79.82 65.62
1937 72.74 NA NA - 72.74 68.05
1938 63.52 NA NA - 63.52 63.47
1939 60.65 NA NA - 60.65 60.52
1940 60.51 NA NA - 60.51 61.28
1941 48.80 NA NA - 48.80 58.93
1942 41.73 NA NA - 41.73 60.21
1943 37.61 NA - - 37.61 57.79
1944 37.06 NA - - 37.06 56.02
1945 38.17 NA - - 38.17 56.52
1946 35.00 NA - - 35.00 58.81
1947 36.03 NA - - 36.03 57.32
1948 36.21 NA - - 36.21 56.28
1949 31.34 NA - - 31.34 51.67
1950 29.76 NA - - 29.76 47.73
1951 32.21 NA - - 32.21 47.56
1952 27.42 NA - - 27.42 47.64
1953 28.65 NA - - 28.65 45.26
1954 29.40 NA - - 29.40 43.66
1955 22.47 21.30 - - 22.43 42.76
1956 23.14 36.49 - - 23.87 42.99
1957 24.41 32.22 - - 24.79 43.74
1958 22.48 28.37 - - 22.75 41.97
1959 20.69 21.20 - - 20.72 39.15
1960 22.84 32.81 - - 23.34 40.85
1961 22.64 28.73 - - 22.92 42.52
1962 22.21 26.31 - - 22.44 42.86
1963 22.74 29.66 - - 23.19 42.38
1964 23.53 26.83 - - 23.72 41.92
1965 24.88 33.20 - - 25.33 43.30
1966 23.89 31.26 - - 24.40 43.05
1967 21.24 34.37 - - 22.09 42.17
1968 23.44 31.29 - - 24.00 42.11
1969 20.77 29.84 - - 21.40 42.81
1970 24.73 26.82 - - 24.87 45.61
1971 25.56 29.39 - - 25.80 48.06
1972 23.61 25.19 - - 23.67 48.34
1973 19.69 25.97 - - 19.88 41.94
1974 16.16 14.86 - - 16.13 29.65
1975 17.05 24.77 5.74 - 17.14 31.27
1976 19.22 27.02 - - 19.27 38.78
1977 18.38 21.38 - - 18.37 39.77
NA Not available.
Independent Mechanical
Year shops and cleaning Grand
yards plants total
1931 NA NA 79.98
1932 NA NA 72.58
1933 NA NA 68.87
1934 NA NA 69.39
1935 NA NA 71.47
1936 NA NA 65.62
1937 NA NA 68.05
1938 NA NA 63.47
1939 NA NA 60.52
1940 NA NA 61.28
1941 NA NA 58.93
1942 NA NA 60.21
1943 NA NA 57.79
1944 NA NA 56.02
1945 NA NA 56.52
1946 NA NA 58.81
1947 NA NA 57.32
1948 NA NA 56.28
1949 NA NA 51.67
1950 NA NA 47.73
1951 NA NA 47.56
1952 NA NA 47.64
1953 NA NA 45.26
1954 NA NA 43.66
1955 NA NA 42.76
1956 NA NA 42.99
1957 NA NA 43.74
1958 NA NA 41.97
1959 NA NA 39.15
1960 NA NA 40.85
1961 NA NA 42.52
1962 NA NA 42.86
1963 NA NA 42.38
1964 NA NA 41.92
1965 NA NA 43.30
1966 NA 24.83 41.80
1967 NA 31.69 41.44
1968 NA 24.97 40.89
1969 NA 22.52 41.44
1970 NA 24.15 44.21
1971 NA 20.87 46.41
1972 12.93 22.65 45.96
1973 12.89 25.29 40.06
1974 13.27 18.05 28.45
1975 12.39 17.26 29.89
1976 15.50 24.05 37.29
1977 16.86 24.39 38.14
NA Not available.
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