Mine Safety and Health Administration (MSHA) - Mining Industry Accident, Injuries, Employment,and Production Statistics Historical Data - Bituminous Mining Data

Table 04. Number of HOURS WORKED at Bituminous Coal Mines in the United States,

by Primary Activity, 1978-2007

Year	Underground Mines			Surface Mines
	Underground	Surf at UG	Total	Strip	Auger	Culm Bank	Dredge	Total
1978	193,235,992	23,471,667	216,707,659	127,029,042	731,435	164,581	12,812	127,937,870
1979	229,776,510	26,448,612	256,225,122	133,785,496	598,590	182,740	48,066	134,614,892
1980	222,291,474	25,593,589	247,885,063	132,731,233	435,796	198,404	83,158	133,448,591
1981	200,143,701	23,172,963	223,316,664	128,037,354	397,004	184,400	126,287	128,745,045
1982	201,869,778	22,842,264	224,712,042	123,659,996	467,057	305,547	122,122	124,544,722
1983¹	153,945,160	17,050,754	170,995,914	107,904,645	387,067	158,357	119,209	108,560,278
1984	166,533,236	17,609,011	184,142,247	117,225,618	380,927	216,459	115,095	117,938,099
1985	160,547,476	16,985,892	177,533,368	107,858,791	482,427	129,303	98,562	108,569,083
1986	149,546,253	16,317,877	165,864,130	100,453,573	342,014	186,271	88,841	101,070,699
1987	138,492,597	14,179,369	152,671,966	95,864,788	676,046	254,723	110,455	96,906,012
1988	132,412,628	13,689,012	146,101,640	90,306,866	807,373	295,651	103,784	91,513,674
1989	128,914,189	13,287,809	142,201,998	88,888,078	694,616	301,646	145,692	90,030,032
1990	133,874,429	13,814,032	147,688,461	90,094,833	628,220	276,079	155,382	91,154,514
1991	122,070,415	12,545,740	134,616,155	81,928,100	644,767	258,789	112,277	82,943,933
1992	113,037,618	11,343,999	124,381,617	77,962,689	664,680	235,803	82,664	78,945,836
1993	94,631,858	9,578,174	104,210,032	71,246,947	602,418	205,919	49,909	72,105,193
1994	99,669,926	9,584,975	109,254,901	72,337,855	732,222	243,726	67,492	73,381,295
1995	93,800,984	8,527,004	102,327,988	65,857,836	744,622	197,632	73,945	66,874,035
1996	90,366,391	7,958,558	98,324,949	62,859,456	971,255	175,295	84,063	64,090,069
1997	88,070,192	7,695,736	95,765,928	62,349,269	1,006,837	195,347	114,785	63,666,238
1998	84,493,917	7,528,340	92,022,257	60,870,299	1,012,564	192,674	145,486	62,221,023
1999	76,863,368	6,759,450	83,622,818	57,045,315	967,434	154,290	121,905	58,288,944
2000	70,323,447	6,224,860	76,548,307	53,007,062	787,858	213,453	121,704	54,130,077
2001	74,366,243	6,311,783	80,678,026	59,284,835	857,652	273,706	141,076	60,557,269
2002	70,266,320	5,971,208	76,237,528	59,520,557	874,721	217,024	88,609	60,700,911
2003	68,630,697	5,541,309	74,172,006	56,246,544	720,531	242,163	102,255	57,311,493
2004	73,363,196	5,404,010	78,767,206	59,916,160	907,695	375,190	84,170	61,283,215
2005	80,738,151	5,632,863	86,371,014	64,806,518	1,096,766	469,252	69,462	66,441,998
2006	85,051,701	5,891,315	90,943,016	67,290,949	1,348,089	488,762	74,800	69,202,600
2007	84,334,300	6,052,305	90,386,605	65,502,976	1,265,912	523,874	54,142	67,346,904

¹Beginning in 1983, only operator data are available at this level of detail.

Table 04. Number of HOURS WORKED at Bituminous Coal Mines in the United States,

by Primary Activity, 1978-2007 – continued:

Year	Total Mining	Indp Shops/Yrds	Prep Plants	Total w/o Office	Office	Grand Total
1978	344,645,529	6,093,756	31,968,035	382,707,320	15,176,698	397,884,018
1979	390,840,014	7,528,448	39,127,465	437,495,927	17,418,305	454,914,232
1980	381,333,654	6,992,875	40,292,120	428,618,649	18,701,177	447,319,826
1981	352,061,709	5,767,038	39,574,890	397,403,637	18,961,303	416,364,940
1982	349,266,764	5,450,769	38,731,618	393,449,151	19,967,172	413,416,323
1983¹	279,556,192	4,535,316	30,554,596	314,646,104	17,790,464	332,436,568
1984	302,080,346	4,205,793	33,940,085	340,226,224	17,501,838	357,728,062
1985	286,102,451	3,705,027	32,405,332	322,212,810	16,831,993	339,044,803
1986	266,934,829	3,163,855	30,938,800	301,037,484	15,719,416	316,756,900
1987	249,577,978	2,548,608	29,550,968	281,677,554	14,635,079	296,312,633
1988	237,615,314	2,094,633	29,533,043	269,242,990	14,086,263	283,329,253
1989	232,232,030	1,806,627	29,412,739	263,451,396	13,861,911	277,313,307
1990	238,842,975	2,094,060	29,642,734	270,579,769	13,343,412	283,923,181
1991	217,560,088	2,060,562	27,561,982	247,182,632	12,407,931	259,590,563
1992	203,327,453	1,863,873	26,022,684	231,214,010	11,872,397	243,086,407
1993	176,315,225	1,579,713	22,740,240	200,635,178	11,021,443	211,656,621
1994	182,636,196	1,564,874	23,701,076	207,902,146	10,971,235	218,873,381
1995	169,202,023	1,271,805	21,776,088	192,249,916	10,121,743	202,371,659
1996	162,415,018	1,016,098	21,129,492	184,560,608	9,266,311	193,826,919
1997	159,432,166	916,011	20,238,697	180,586,874	8,746,897	189,333,771
1998	154,243,280	936,650	19,133,277	174,313,207	7,860,320	182,173,527
1999	141,911,762	932,378	17,433,532	160,277,672	6,942,610	167,220,282
2000	130,678,384	1,098,122	16,450,673	148,227,179	6,285,584	154,512,763
2001	141,235,295	1,072,686	17,330,790	159,638,771	6,523,645	166,162,416
2002	136,938,439	941,056	17,384,343	155,263,838	6,456,568	161,720,406
2003	131,483,499	922,669	16,607,646	149,013,814	6,024,906	155,038,720
2004	140,050,421	945,335	17,257,924	158,253,680	6,180,949	164,434,629
2005	152,813,012	981,410	18,666,962	172,461,384	6,782,096	179,243,480
2006	160,145,616	978,262	18,953,581	180,077,459	6,905,109	186,982,568
2007	157,733,509	988,900	18,565,671	177,288,080	7,088,668	184,376,748

¹Beginning in 1983, only operator data are available at this level of detail.

Year