UNITED STATES
DEPARTMENT OF LABOR
DEPARTMENT OF LABOR
Historical Data 1931 - 1977 Bituminous Mines in the United States |
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TABLE 10B. - Man-hours, by general work location, at bituminous mines in the United States, 1931-77 Underground mines Total Year underground Underground Surface mines 1931 589,257,418 76,512,456 665,769,874 1932 466,914,899 66,412,880 533,327,779 1933 547,825,683 81,012,012 628,837,695 1934 582,493,398 85,274,568 667,767,966 1935 571,877,405 81,726,086 653,603,491 1936 659,651,911 95,033,145 754,685,056 1937 666,083,451 92,969,503 759,052,954 1938 491,776,427 71,661,952 563,438,379 1939 539,808,782 78,337,437 618,146,219 1940 608,341,495 87,500,068 695,841,563 1941 663,615,116 98,101,373 761,716,489 1942 732,161,751 116,368,785 848,530,536 1943 716,572,814 126,429,168 843,001,982 1944 719,457,567 140,317,699 859,775,266 1945 631,295,355 127,571,775 758,867,130 1946 557,241,688 112,579,199 669,820,887 1947 614,710,221 121,861,355 736,571,576 1948 563,268,925 114,409,403 677,678,328 1949 398,295,255 82,063,558 480,358,813 1950 442,339,238 92,719,057 535,058,295 1951 443,311,604 91,919,348 535,230,952 1952 370,370,004 77,577,247 447,947,251 1953 327,796,823 70,270,114 398,066,937 1954 241,975,814 55,550,372 297,526,186 1955 267,060,347 61,747,193 328,807,540 1956 271,412,129 62,543,534 333,955,663 1957 256,698,850 59,482,636 316,181,486 1958 195,439,958 47,150,086 242,590,044 1959 178,671,053 44,833,005 223,504,058 1960 170,859,073 42,808,275 213,667,348 1961 153,838,760 38,808,078 192,646,838 1962 148,871,378 37,811,779 186,683,157 1963 150,815,086 38,027,261 188,842,347 1964 152,751,716 36,501,134 189,252,850 1965 153,021,285 35,731,720 188,753,005 1966 149,452,245 23,544,419 172,996,664 1967 149,881,259 21,635,323 171,516,582 1968 145,926,919 19,628,536 165,555,455 1969 149,681,005 18,440,872 168,121,877 1970 162,406,909 18,676,034 181,082,943 1971 152,237,035 18,677,741 170,914,776 1972 169,723,048 16,839,961 186,563,009 1973 171,029,899 16,662,926 187,692,825 1974 172,876,081 17,859,676 190,735,757 1975 209,808,919 23,385,926 233,194,845 1976 217,251,697 23,815,467 241,067,164 1977 205,726,540 24,143,419 229,869,959 NA Not available. Total Year Strip Auger Culm Dredges surface Total banks mining mining 1931 9,100,630 NA NA NA 9,100,630 674,870,504 1932 8,852,759 NA NA NA 8,852,759 542,180,538 1933 9,286,475 NA NA NA 9,286,475 638,124,170 1934 9,346,915 NA NA NA 9,346,915 677,114,881 1935 11,443,618 NA NA NA 11,443,618 665,047,109 1936 15,133,873 NA NA - 15,133,873 769,818,929 1937 17,527,962 NA NA - 17,527,962 776,580,916 1938 16,309,101 NA NA - 16,309,101 579,747,480 1939 18,681,956 NA NA - 18,681,956 636,828,175 1940 22,127,885 NA NA - 22,127,885 717,969,448 1941 29,712,028 NA NA - 29,712,028 791,428,517 1942 34,987,830 NA NA - 34,987,830 883,518,366 1943 40,707,026 NA - - 40,707,026 883,709,008 1944 55,150,024 NA - - 55,150,024 914,925,290 1945 58,449,068 NA - - 58,449,068 817,316,198 1946 58,174,057 NA - - 58,174,057 727,994,944 1947 66,444,762 NA - - 66,444,762 803,016,338 1948 70,007,405 NA - - 70,007,405 747,685,733 1949 52,806,709 NA - - 52,806,709 533,165,522 1950 59,777,580 NA - - 59,777,580 594,835,875 1951 55,175,441 NA - - 55,175,441 590,406,393 1952 49,966,814 NA - - 49,966,814 497,914,065 1953 46,251,902 NA - - 46,251,902 444,318,839 1954 40,201,033 NA - - 40,201,033 337,727,219 1955 43,074,229 1,502,084 - - 44,576,313 373,383,853 1956 46,800,890 2,685,664 - - 49,486,554 383,442,217 1957 45,355,642 2,358,783 - - 47,714,425 363,895,911 1958 42,123,086 2,044,676 - - 44,167,762 286,757,806 1959 41,222,298 1,933,575 - - 43,155,873 266,659,931 1960 41,243,919 2,164,178 - - 43,408,097 257,075,445 1961 38,345,073 1,879,406 - - 40,224,479 232,871,317 1962 39,264,604 2,318,852 - - 41,583,456 228,266,613 1963 40,495,726 2,798,202 - - 43,293,928 232,136,275 1964 40,323,661 2,460,342 - - 42,784,003 232,036,853 1965 41,480,190 2,379,825 - - 43,860,015 232,613,020 1966 38,384,042 2,879,369 - - 41,263,411 214,260,075 1967 39,132,387 2,735,248 - - 41,867,635 213,384,217 1968 38,988,793 3,003,954 - - 41,992,747 207,548,202 1969 40,963,633 3,050,098 - - 44,013,731 212,135,608 1970 48,816,087 3,690,955 - - 52,507,042 233,589,985 1971 55,324,453 3,776,796 - - 59,101,249 230,016,025 1972 49,892,914 1,945,157 7,764 - 51,845,835 238,408,844 1973 55,396,261 1,732,973 - 9,156 57,138,390 244,831,215 1974 70,957,562 1,884,108 15,873 9,019 72,866,562 263,602,319 1975 94,611,096 1,453,643 174,192 41,116 96,280,047 329,474,892 1976 101,203,129 1,147,389 205,049 - 102,555,567 343,622,731 1977 116,567,940 1,122,651 197,905 - 117,888,496 347,758,455 NA Not available. Independent Mechanical Year shops and cleaning Grand yards plants total 1931 NA NA 674,870,504 1932 NA NA 542,180,538 1933 NA NA 638,124,170 1934 NA NA 677,114,881 1935 NA NA 665,047,109 1936 NA NA 769,818,929 1937 NA NA 776,580,916 1938 NA NA 579,747,480 1939 NA NA 636,828,175 1940 NA NA 717,969,448 1941 NA NA 791,428,517 1942 NA NA 883,518,366 1943 NA NA 883,709,008 1944 NA NA 914,925,290 1945 NA NA 817,316,198 1946 NA NA 727,994,944 1947 NA NA 803,016,338 1948 NA NA 747,685,733 1949 NA NA 533,165,522 1950 NA NA 594,835,875 1951 NA NA 590,406,393 1952 NA NA 497,914,065 1953 NA NA 444,318,839 1954 NA NA 337,727,219 1955 NA NA 373,383,853 1956 NA NA 383,442,217 1957 NA NA 363,895,911 1958 NA NA 286,757,806 1959 NA NA 266,659,931 1960 NA NA 257,075,445 1961 NA NA 232,871,317 1962 NA NA 228,266,613 1963 NA NA 232,136,275 1964 NA NA 232,036,853 1965 NA NA 232,613,020 1966 NA 15,827,064 230,087,139 1967 NA 16,030,924 229,415,141 1968 NA 15,857,479 223,405,681 1969 NA 15,275,800 227,411,408 1970 NA 16,355,411 249,945,396 1971 NA 14,803,806 244,819,831 1972 3,325,592 19,603,772 261,338,208 1973 5,118,858 21,625,415 271,575,488 1974 5,349,888 22,719,830 291,672,037 1975 6,375,549 27,399,552 363,249,993 1976 6,711,797 27,650,596 377,985,124 1977 6,642,312 31,032,738 385,433,505 NA Not available. |