Mine Safety and Health Administration (MSHA) - Mining Industry Accident, Injuries, Employment, and Production Statistics - Anthracite Mining Data - Table 01. Number of Metal/Nonmetal Operations in the United States, by Primary Activity, 1978-2006

Table 01. Number of Metal/Nonmetal [1]Operations in the United States, by Primary Activity, 1978-2007

Year	Underground Mines			Surface Mines
	Underground	Surf at UG	Total	Strip	Dredge	Other	Total
1978	670	28	698	10,329	889	28	11,246
1979	679	32	711	11,127	900	21	12,048
1980[2]	777	35	812	11,036	877	13	11,926
1981	786	54	840	10,579	834	2	11,415
1982	697	52	749	8,485	712	3	9,200
1983	578	46	624	9,187	731	1	9,919
1984	669	14	683	10,862	820	1	11,683
1985	459	28	487	9,715	779	1	10,495
1986	420	34	454	9,544	831	1	10,376
1987	405	28	433	9,565	887	-	10,452
1988	399	28	427	9,760	886	-	10,646
1989	394	25	419	9,785	883	-	10,668
1990	376	18	394	9,859	908	-	10,767
1991	316	25	341	9,750	896	-	10,646
1992	290	22	312	9,457	897	-	10,354
1993	276	7	283	9,404	876	3	10,283
1994	276	12	288	9,303	882	33	10,218
1995	266	11	277	9,190	842	31	10,063
1996	248	15	263	9,177	814	23	10,014
1997	246	16	262	9,421	794	23	10,238
1998	249	15	264	9,767	786	17	10,570
1999	256	11	267	10,238	796	14	11,048
2000	248	14	262	10,627	793	16	11,436
2001	221	14	235	10,874	765	10	11,649
2002	220	8	228	10,855	761	12	11,628
2003	221	11	232	10,822	772	11	11,605
2004	234	8	242	10,825	823	13	11,661
2005	238	9	247	10,950	824	18	11,792
2006	244	12	256	11,085	825	18	11,928
2007	238	18	256	11,174	826	14	12,014

Table 01. Number of Metal/Nonmetal¹Operations in the United States, by Primary Activity, 1978-2007 – continued:

Year	Total Mining	Indp Shops/Yrds	Mills	Total w/o Office	Office	Grand Total
1978	11,944	48	865	12,857	66	12,923
1979	12,759	43	868	13,670	62	13,732
1980	12,738	36	728	13,502	64	13,566
1981	12,255	33	773	13,061	82	13,143
1982	9,949	30	770	10,749	135	10,884
1983	10,543	27	720	11,290	94	11,384
1984	12,366	25	725	13,116	30	13,146
1985	10,982	26	703	11,711	121	11,832
1986	10,830	22	650	11,502	79	11,581
1987	10,885	21	629	11,535	79	11,614
1988	11,073	23	617	11,713	95	11,808
1989	11,087	21	574	11,682	83	11,765
1990	11,161	21	576	11,758	80	11,838
1991	10,987	20	554	11,561	81	11,642
1992	10,666	18	530	11,214	80	11,294
1993	10,566	18	548	11,132	69	11,201
1994	10,506	22	488	11,016	77	11,093
1995	10,340	23	490	10,853	60	10,913
1996	10,277	22	481	10,780	63	10,843
1997	10,500	20	490	11,010	63	11,073
1998	10,834	17	486	11,337	72	11,409
1999	11,315	15	480	11,810	77	11,887
2000	11,698	13	466	12,177	112	12,289
2001	11,884	14	465	12,363	116	12,479
2002	11,856	15	456	12,327	128	12,455
2003	11,837	16	447	12,300	119	12,419
2004	11,903	18	429	12,350	117	12,467
2005	12,039	17	430	12,486	117	12,603
2006	12,184	19	429	12,632	140	12,772
2007	12,270	20	425	12,715	126	12,841

[1] Includes stone, sand and gravel operations.

[2] Beginning in 1980, independent contractors working on mine property performing mine exploration, development, production, maintenance, repair and construction work were assigned an identification number, and reported to MSHA, and are included in the count of operations. Since 1983, the contractors were separated from the mines.