Mining Facts - 2013

Overall Mining

The Mine Safety and Health Administration (MSHA) maintains data collected under the Code of Federal Regulations (30 CFR Part 50) on accidents, fatal and nonfatal injuries, illnesses, employment, and coal production. Summary data were obtained from the MSHA data files for mine operators and independent contractors working on mine property. See Statistical Methodology for further information.

Mining Operations

• In 2013, a total of 13,759 mining operations [1] reported employment to MSHA.
• Active mining operations were distributed among the coal (n=1,700; 12.4%), metal and nonmetal (n=1,231; 8.9%), and stone and sand & gravel (n=10,828; 78.7%) industry sectors. [2]
• The majority of the active mining operations were classified as surface (n=13,000; 94.5%). Underground mines accounted for the remainder of operations (n=759; 5.5%).
• Nearly half (44.6%) of the mining operations produced the primary commodity of sand & gravel, followed by crushed and broken limestone (14.1%), and bituminous coal (11.3%).
• Mines reporting to MSHA are located in all 50 states, Puerto Rico, and the Virgin Islands. Pennsylvania had the most mines (n=897; 6.5%) followed by Texas (n=716; 5.2%). Almost half (48.7%) of the active mining operations were located in the 13 topmost states. 

 

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Data for the previous chart showing the number of active mining operations and percent of total by commodity in 2013 (N=13,759) 

Commodity	Number of Mines	Percent of Total
Coal	1,700	12
Metal	349	3
Nonmetal	882	6
Stone	4,362	32
Sand & Gravel	6,466	47

 

Employees

• A total of 373,882 employees, [3] corresponding to 317,581 full-time equivalent (FTE) [4] employees, were reported to MSHA by mine operators and independent contractors. [5]
• Within the mining commodities, [6] coal mine operator employees accounted for 28.6% of all employee hours reported, followed by stone operators (19.7%), metal operators (15.0%), noncoal contractors (13.5%), sand & gravel operators (8.1%), coal contractors (7.1%), and nonmetal operators (7.9%).
• The FTE employees reported for surface [7] work locations were higher (n=254,050; 80.0%) than those at underground work locations (n=63,531; 20.0%).
• The average number of mine operator employees comprised 67.7% of the workforce compared to 32.3% for independent contractors.
• The distribution of employees by industry sector included coal operators (n=83,005; 22.2 %), metal and nonmetal operators (n=70,888; 19.0%), stone and sand & gravel operators (n=99,268; 26.6%), coal contractors (n=39,943; 10.7%), and noncoal contractors (n=80,778; 21.6%).

 

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 Data for the previous chart showing the average number of employees by industry sector in 2013

Industry Sector	Number of Employees
Coal Operator	83,005
Metal and Nonmetal Operator	70,888
Stone and Sand & Gravel Operator	99,268
Coal Contractor	39,943
Noncoal Contractor	80,778

 

Occupational Fatalities

• There were 41 occupational fatalities reported to MSHA in 2013. This compares to 35 in 2012.
• Within the industry sectors, nearly half of the fatalities occurred in the coal sector (n=20; 48.8%), followed by stone and sand & gravel (n=13; 31.7%) and metal and nonmetal (n=8; 19.5%).
• Fatalities occurred at surface work locations in 53.7% of the cases (n=22) with the remainder (n=19; 46.3%) occurring at underground work locations.
• The overall fatality rate was 14.2 [95% confidence interval (CI): 10.2, 19.2] per 100,000 FTE employees.
• The fatality rate of 29.9 [CI: 18.0, 46.7] for underground workers was higher than the surface worker rate of 9.8 [CI: 6.1, 14.8].
• The fatality rate for mine operators was 16.3 [CI: 11.5, 22.4] (n=37). Note that no rate was calculated for independent contractor fatalities when the number was less than 5 (n=4).
• The highest number of fatalities reported by accident classification was for powered haulage (n=14; 34.1%), followed by machinery (n=9; 22.0%).
• The nature of injury most frequently reported for the fatalities was multiple injuries (n=18; 43.9%), followed by crushing (n=12; 29.3%).
• Multiple body parts (n=16; 39.0%); head, not elsewhere classified (n=9; 22.0%); and body systems (n=7; 17.1%) were the parts of body most frequently reported for fatalities.

 

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 Data for the previous chart showing the distribution of occupational fatalities by accident class for 2013 (N=41)

Accident Classification	Percent of Total
Powered haulage	34.1
Machinery	22.0
Fall of ground (from in place)	12.2
Explosives and breaking agents	9.8
Falling, rolling, or sliding rock or material	9.8
All other	12.2

 

Nonfatal Lost-time Injuries

• In 2013, there were 5,258 nonfatal lost-time injuries occurring at an overall rate of 1.8 [CI: 1.8, 1.9] per 100 FTE employees.
• These injuries occurred at underground (n=1,948; 37.0%) and surface (n=3,310; 63.0%) work locations.
• A total of 331,399 days were lost from work [8] as a result of these injuries.
• The nonfatal lost-time injury rate for mine operators was 2.0 [CI: 2.0, 2.1] per 100 FTE employees, and the independent contractor injury rate was 1.0 [CI: 0.9, 1.1].
• Underground workers had a higher rate of nonfatal lost-time injuries at 3.1 [CI: 2.9, 3.2]. The rate for surface workers was 1.5 [CI: 1.4, 1.5) per 100 FTE employees.
• The most frequent accident classification of nonfatal lost-time injuries involved handling materials (n=1,896; 36.1%), followed by slip or fall of person (n=1,342; 25.5%). When considering worker location, handling materials was the leading accident classification for both underground (n=665; 34.1%) and surface (n=1,231; 37.2%) locations.
• Sprains or strains was the most frequently reported nature of injury (n=2,372; 45.1%). This was followed by injuries involving fractures,  chips (n=918; 17.5%); cuts, lacerations, punctures (n=557; 10.6%); and contusions, bruises (n=470; 8.9%).
• The back was the most frequently reported body part injured (n=926; 17.6%) resulting in 59,884 days lost from work. This was followed by injuries to the finger (n=640; 12.2%; 30,791 days lost) and the knee (n=540; 10.3%; 31,765 days lost).

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Data for the previous chart showing the rate (per 100 full-time equivalent employees) of nonfatal lost-time injuries by year, 2009-2013 (excludes office employees) 

Year	Overall	Operator	Contractor
2009	2.2	2.4	1.3
2010	2.0	2.2	1.2
2011	1.9	2.1	1.2
2012	1.9	2.1	1.1
2013	1.8	2.0	1.0

Coal Mine Operator Industry Sector

Mining Operations

• In 2013, a total of 1,700 coal mining operations reported employment to MSHA. This compares to 1,871 coal mining operations in 2012.
• Bituminous mines comprised 91.3% (n=1,552) and anthracite mines 8.7% (n=148) of all coal mining operations.
• The majority of coal mines are classified as surface mines (n=1,204; 70.8%).
• Approximately 71% of all coal mines were located in three states: Kentucky (n=449; 26.4%), Pennsylvania (n=385; 22.6%), and West Virginia (n=378; 22.2%).

Employees

• A total of 83,005 employees, corresponding to 90,848 FTE employees, were reported by coal mine operators.
• Within the mining commodity sectors, coal mine operator employees accounted for 28.6% of all employee hours reported.
• The employee hours reported for underground and surface work locations were nearly equal.
• The average number of employees at underground work locations was reported as 40,830 (49.2%) and 42,175 (50.8%) employees working at surface locations.

Occupational Fatalities

• There were 18 occupational fatalities (14 occurring underground and 4 at the surface) reported among coal mine operator employees in 2013.
• The fatality rate was 20.5 [CI: 12.1, 32.4] per 100,000 FTE employees.
• The highest numbers of fatalities reported by accident classification was for powered haulage (n=7; 38.9%) and machinery (n=5; 27.8%).
• The leading nature of injury for these coal mine operator fatalities was crushing (n=10; 55.6%), followed by multiple injuries (n=6; 33.3%).

Nonfatal Lost-time Injuries

• There were 2,128 nonfatal lost-time injuries (1,577 at underground and 551 at surface work locations) among coal mine operators occurring at a rate of 2.4 [CI: 2.3, 2.5] per 100 FTE employees. A total of 171,560 days lost from work resulted from these injuries.
• The most frequent accident classification of nonfatal lost-time injuries for coal mine operator employees involved handling materials (n=718; 33.7%), followed by slip or fall of person (n=512; 24.1%).
• Sprains or strains was the most frequently reported nature of injury (n=1,025; 48.2%). This was followed by fractures or chips (n=385; 18.1%).
• The back was the most frequently reported body part injured (n=393; 18.5%) and accounted for 36,395 days lost from work. This was followed by injuries to the knee (n=255; 12.0%), shoulder (n=206; 9.7%), and fingers (n=205; 9.6%). 

 

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Data for the previous chart showing the number and rate (per 100 full-time equivalent employees) of coal mine operator nonfatal lost-time injuries by work location and year, 2009-2013 (excludes office employees)

Year	Underground Number	Underground Rate	Surface Number	Surface Rate
2009	1,943	4.3	757	1.6
2010	1,818	3.8	670	1.4
2011	1,896	3.6	691	1.3
2012	1,717	3.4	596	1.3
2013	1,577	3.4	551	1.3

Metal and Nonmetal Mine Operator Industry Sector

Mining Operations

• A total of 1,231 metal and nonmetal mining operations reported employment to MSHA in 2013. This compares to 992 mines reported in 2012. Note that this increase may be attributed to a new Standard Industrial Classification (SIC) added by MSHA for “Sand, industrial; ground silica/quartz” (SIC 14460) with a canvass class of nonmetal. Prior to 2013, these mines were assigned SIC 14410 with a canvass class of sand & gravel.
• The new SIC for sand, industrial, ground silica/quartz comprised the largest number of metal and nonmetal mining operations (n=261; 21.2%). This was followed by gold (n=193; 15.7%) and common clay (n=135; 11.0%).
• The leading SIC at metal mining operations was gold (n=193; 55.3%). Nonmetal mining operations reported sand, industrial, ground silica/quartz as the primary commodity mined (n=261; 29.6%).
• Active metal and nonmetal mining operations are found through 48 states and Puerto Rico.
• The majority of metal and nonmetal mining operations are classified as surface mines (n=1,079; 87.7%).
• Nevada had the largest number of metal and nonmetal mines (n=112; 9.1%), followed by California (n=82; 6.7%), and Texas (n=77; 6.3%).

Employees

• Metal and nonmetal mine operators reported a total of 70,888 employees, corresponding to 72,562 FTE employees.
• Within the mining commodity sectors, metal and nonmetal mine operator employees accounted for 22.8% of all employee hours reported.
• Metal and nonmetal employees were reported for both underground (13.6%) and surface (86.4%) work locations.

Occupational Fatalities

• There were seven occupational fatalities (five occurring underground and two at a surface work location) reported among metal and nonmetal mine operator employees in 2013. This compares to three fatalities reported in 2012.
• The fatality rate was 11.0 [CI: 4.4, 22.7] per 100,000 FTE employees.
• The fatalities had accident classifications of powered haulage (n=3); falling, rolling, or sliding rock or material (n=2); and explosives and breaking agents (n=2).
• The nature of injury with the highest frequency was multiple injuries (n=4). 

Nonfatal Lost-time Injuries

• There were 1,152 nonfatal lost-time injuries (204 at underground and 948 at surface work locations) among metal and nonmetal operators occurring at a rate of 1.8 [CI: 1.7, 1.9] per 100 FTE employees. A total of 52,419 days lost from work resulted from these injuries.
• The most frequent accident classification of nonfatal lost-time injuries for metal and nonmetal mine operator employees in­volved handling materials (n=428; 37.2%) followed by slip or fall of person (n=302; 26.2%).
• Sprains or strains was the most frequently reported nature of injury (n=542; 47.0%).
• The back was the most frequently reported body part injured (n=196; 17.0%) and accounted for 7,248 days lost from work. This was followed by injuries to fingers (n=148; 12.8%), shoulders (n=113; 9.8%), and knees (n=110; 9.5%).

 

 

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Data for the previous chart showing the number and rate (per 100 full-time equivalent employees) of metal and nonmetal mine operator nonfatal lost-time injuries by work location and year, 2009-2013 (excludes office employees) 

Year	Underground Number	Underground Rate	Surface Number	Surface Rate
2009	192	2.7	750	1.9
2010	235	3.0	703	1.6
2011	223	2.5	733	1.6
2012	259	2.7	741	1.5
2013	204	2.1	948	1.8

Stone and Sand & Gravel Mine Operator Industry Sector

Mining Operations

• A total of 10,828 stone and sand & gravel mining operations reported employee hours to MSHA in 2013 compared to 11,230 in 2012. Note that changes MSHA made to SICs in 2013 resulted in 261 mines that were formally classified as sand & gravel mines being moved to the nonmetal canvass class.
• Stone and sand & gravel mines were found throughout all 50 states, the Virgin Islands, and Puerto Rico.
• In stone mining, crushed and broken limestone was the primary commodity for the largest number of mining operations (n=1,943; 44.5%).
• Pennsylvania had the most stone mines (n=406; 9.3%), followed by Texas (n=376; 8.6%).
• Sand & gravel is the primary commodity mined at sand & gravel mines (n=6,140; 95.0%). The other primary commodity mined had the new SIC for construction sand & gravel and common sand (n=325; 5.0%).
• The states with the leading number of sand & gravel mines were Minnesota (n=488; 7.5%), New York (n=399; 6.2%), Wisconsin (n=398; 6.2%), and Michigan (n=356; 5.5%). 

Employees

• There were 99,268 employees, corresponding to 88,502 FTE employees, reported by stone and sand & gravel mine operators.
• Within the mining commodity sectors, stone and sand & gravel mine operator employees accounted for 27.9% of all employee hours reported.
• All sand & gravel operator hours reported were for surface work locations. Stone operator hours were reported for both underground (3.1%) and surface (96.9%) work locations.

Occupational Fatalities

• In 2013, there were 12 occupational fatalities reported among stone and sand & gravel mine operators, compared to 10 in 2012.
• All of these fatalities occurred at surface work areas of the mine.
• The fatality rate was 15.8 [CI: 8.1, 27.5] per 100,000 FTE employees.
• Powered haulage was the accident classification with the most fatalities (n=4; 33.3%).
• The leading nature of injury for these fatalities was multiple injuries (n=6; 50.0%).

Nonfatal Lost-time Injuries

• There were 1,363 nonfatal lost-time injuries (36 at underground and 1,327 at surface work locations) among stone and sand & gravel operators occurring at a rate of 1.8 [CI: 1.7, 1.9] per 100 FTE employees. A total of 76,476 days lost from work resulted from these injuries.
• The leading accident classification of nonfatal lost-time injuries for stone and sand & gravel operator employees involved handling materials (n=536; 39.3%), followed by slip or fall of person (n=366; 25.9%) and hand tools (n=152; 11.2%).
• Sprains or strains was the most frequently reported nature of injury (n=604; 44.3%).
• The back was the most frequently reported body part injured (n=245; 18.0%) and accounted for 12,660 days lost from work. This was followed by injuries to fingers (n=194; 14.2%) with 7.837 days lost. 

  

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Data for the previous chart showing the number and rate (per 100 full-time equivalent employees) of stone and sand & gravel mine operator nonfatal lost-time injuries by work location and year, 2009-2013 (excludes office employees)

Year	Underground Number	Underground Rate	Surface Number	Surface Rate
2009	37	2.0	1,607	2.1
2010	41	2.2	1,542	2.1
2011	35	1.8	1,451	1.9
2012	42	2.2	1,478	1.9
2013	36	1.9	1,327	1.8

Coal and Noncoal Independent Contractors

An independent contractor is defined by MSHA as “any person, partnership, corporation, subsidiary of a corporation, firm, association or other organization that contracts to perform services or construction at a mine.” Contractors that perform specific types of work are required to report the number of employees who work at coal mines and noncoal mines.

Independent Contracting Companies

• A total of 10,285 independent contracting companies reported employee hours to MSHA.
• Coal contractors accounted for 3,215 of the companies (31.3%), and 7,070 (68.7%) were noncoal (metal, nonmetal, stone, and sand & gravel) contracting companies.

Employees

• Independent contractors reported a total of 120,721 employees, corresponding to 65,670 FTE employees.
• Coal contractor employees comprised 33.1% (n=39,943) of the contractor employment, and noncoal contractor employees represented 66.9% with 80,778 employees reported.
• The distribution of employee hours for coal contractors was 15.8% for underground work locations and 84.2% for surface locations.
• Noncoal contractor employee hours were reported at underground locations 5.2% of the time with 94.8% of the hours being worked at surface locations.

Occupational Fatalities

• A total of four occupational fatalities occurred among independent contractor employees. Note: No fatality rates are calculated when the number of fatalities is less than five.
• Two of these fatalities were attributed to coal contractors and two fatalities were for noncoal contractors.
• All these fatalities occurred at surface areas of the mine.
• Of the contractor fatalities, two had an accident classification of machinery, one was electrical, and one fatality was classified as falling, rolling, or sliding rock or material.

Nonfatal Lost-time Injuries

• There were 615 nonfatal lost-time injuries among contractor employees (131 at underground and 484 at surface work locations) with an overall rate of 1.0 [CI: 0.9, 1.1] injuries per 100 FTE employees.
• The underground nonfatal lost-time injury rate of 2.3 [CI: 1.9, 2.6] was greater than the surface injury rate of 0.9 [CI: 0.8, 0.9] per 100 FTE workers.
• Of the total injuries, 271 were attributed to coal contractors and 344 were for noncoal contractors.
• The leading contractor classification of nonfatal lost-time injuries involved handling materials (n=214; 34.8%) followed by slip or fall of person (n=162; 26.3%).
• The back was the most frequently reported part of body injured for coal contractors (n=47; 17.3%), resulting in 2,298 days lost from work. The leading parts of body injured for noncoal contractors were fingers (n=60; 17.4%; 3,636 days lost) and back (n=45; 13.1%; 52; 1,283 days lost).
• Sprains and strains was the most frequently reported nature of injury for coal contractors (n=105; 38.7%) and for noncoal contractors (n=96; 27.9%). 

  

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Data for the previous chart showing the number and rate (per 100 full-time equivalent employees) of coal and noncoal contractor lost-time injuries by year, 2009-2013 (excludes office employees)

Year	Coal Number	Coal Rate	Noncoal Number	Noncoal Rate
2009	410	1.8	249	0.9
2010	361	1.5	253	0.9
2011	403	1.6	345	1.0
2012	345	1.4	384	1.0
2013	271	1.3	344	0.9

Notes

Publicly released employment and accident/injury/illness data were collected by the Mine Safety and Health Administration (MSHA) under the Code of Federal Regulations (30 CFR 50). All analyses of accident data exclude office employees. Occupational fatalities exclude all cases under 17 years of age. Caution should be used when interpreting rates based on a small number of events.

   [1] Both mine operator and independent contractor employees work at mining operations. Active mines are those that report any mine operator employment. Mines at which only independent contractors were working and did not show any operator employment were not counted.

   [2] Mining industry sectors include: (1) coal, (2) metal and nonmetal, and (3) stone and sand & gravel.

   [3] Average number of employees working at individual mines during calendar quarters of active operations (includes office workers).

   [4] Full-time equivalent employees computed using reported employee hours (2,000 hours = 1 FTE; includes office workers).

   [5] Independent contractors do not report mine-specific information for employment. The data they provide are summaries for all coal and all noncoal (metal, nonmetal, stone, and sand & gravel) mining operations. For this reason, contractors cannot be included when computing fatality and injury rates for either the metal and nonmetal or the stone and sand & gravel industry sectors.

   [6] Mining commodity and type of employer classes include coal operators, metal operators, nonmetal operators, stone operators, sand & gravel operators, coal contractors, and noncoal (metal, nonmetal, stone, and sand & gravel) contractors.

   [7] Surface work locations include surface operations at underground mines, surface operations (strip or open pit), dredge, other surface operations, independent shops and yards, and mills or preparation plants.

   [8] Total days lost includes actual days away from work and/or days of restricted work activity. For permanently disabling injuries only, statutory days charged by MSHA were used if they exceeded the total lost workdays.

 

Data Tables

Active Mining Operations, 2013

Commodity and Industry Sector	Underground	Surface	Total
Coal	496	1,204	1,700
Coal Sector	496	1,204	1,700
Metal	108	241	349
Nonmetal	44	838	882
Metal and Nonmetal Sector	152	1,079	1,231
Stone	111	4,251	4,362
Sand & Gravel	0	6,466	6,466
Stone and Sand & Gravel Sector	111	10,717	10,828
TOTAL	759	13,000	13,759

Independent Contracting Companies, 2013

Commodity	Companies
Coal	3,215
Noncoal	7,070
Total	10,285

Employment Characteristics, 2013

Commodity, Type of Employer, Industry Sector	Underground  Employees	Surface Employees	Total Employees	Underground FTE Employees	Surface FTE Employees	Total FTE Employees
Coal Operator Sector	40,830	42,175	83,005	45,978	44,870	90,848
Metal Operator	6,948	38,777	45,725	6,999	40,492	47,491
Nonmetal Operator	2,698	22,465	25,163	2,819	22,251	25,070
Metal and Nonmetal Operator Sector	9,646	61,242	70,888	9,818	62,743	72,562
Stone Operator	1,788	63,373	65,161	1,926	60,733	62,659
Sand & Gravel Operator	0	34,107	34,107	0	25,843	25,843
Stone and Sand & Gravel Operator Sector	1,788	97,480	99,268	1,926	86,576	88,502
Operator Total	52,264	200,897	253,161	57,722	194,189	251,911
Coal Contractor	5,490	34,453	39,943	3,571	19,067	22,638
Noncoal Contractor	3,240	77,538	80,778	2,238	40,794	43,032
Contractor Total	8,730	111,991	120,721	5,809	59,861	65,670
TOTAL	60,994	312,888	373,882	63,531	254,050	317,581
Note: Components may not sum to totals due to rounding

Occupational Fatalities, 2013

Rate per 100,000 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Total Number	Total Rate	Total Lower CI	Total Upper CI
Coal Operator Sector	18	20.5	12.1	32.4
Metal Operator	4	NC	NC	NC
Nonmetal Operator	3	NC	NC	NC
Metal and Nonmetal Operator Sector	7	11.0	4.4	22.7
Stone Operator	11	20.5	10.2	36.7
Sand & Gravel Operator	1	NC	NC	NC
Stone and Sand & Gravel Operator Sector	12	15.8	8.1	27.5
Operator Total	37	16.3	11.5	22.4
Coal Contractor	2	NC	NC	NC
Noncoal Contractor	2	NC	NC	NC
Contractor Total	4	NC	NC	NC
TOTAL	41	14.2	10.2	19.2
Note: NC–Not calculated when N is less than 5

Occupational Fatalities (Underground), 2013

Rate per 100,000 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Underground Number	Underground Rate	Underground Lower CI	Underground Upper CI
Coal Operator Sector	14	30.4	16.6	51.1
Metal Operator	4	NC	NC	NC
Nonmetal Operator	1	NC	NC	NC
Metal and Nonmetal Operator Sector	5	50.9	16.5	118.8
Stone Operator	0	NC	NC	NC
Sand & Gravel Operator	NA	NA	NA	NA
Stone and Sand & Gravel Operator Sector	0	NC	NC	NC
Operator Total	19	32.9	19.8	51.4
Coal Contractor	0	NC	NC	NC
Noncoal Contractor	0	NC	NC	NC
Contractor Total	0	NC	NC	NC
TOTAL	19	29.9	18.0	46.7
Notes: NA–Not applicable; NC–Not calculated when N is less than 5

Occupational Fatalities (Surface), 2013

Rate per 100,000 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Surface Number	Surface Rate	Surface Lower CI	Surface Upper CI
Coal Operator Sector	4	NC	NC	NC
Metal Operator	0	NC	NC	NC
Nonmetal Operator	2	NC	NC	NC
Metal and Nonmetal Operator Sector	2	NC	NC	NC
Stone Operator	11	21.3	10.6	38.1
Sand & Gravel Operator	1	NC	NC	NC
Stone and Sand & Gravel Operator Sector	12	16.2	8.4	28.2
Operator Total	18	10.6	6.3	16.8
Coal Contractor	2	NC	NC	NC
Noncoal Contractor	2	NC	NC	NC
Contractor Total	4	NC	NC	NC
TOTAL	22	9.8	6.1	14.8
Note: NC–Not calculated when N is less than 5

Nonfatal Lost-time Injuries, 2013

Rate per 100 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Total Number	Total Rate	Total Lower CI	Total Upper CI
Coal Operator Sector	2,128	2.4	2.3	2.5
Metal Operator	796	1.9	1.8	2.0
Nonmetal Operator	356	1.7	1.5	1.8
Metal and Nonmetal Operator Sector	1,152	1.8	1.7	1.9
Stone Operator	1,039	1.9	1.8	2.1
Sand & Gravel Operator	324	1.4	1.3	1.6
Stone and Sand & Gravel Operator Sector	1,363	1.8	1.7	1.9
Operator Total	4,643	2.0	2.0	2.1
Coal Contractor	271	1.3	1.1	1.4
Noncoal Contractor	344	0.9	0.8	0.9
Contractor Total	615	1.0	0.9	1.1
TOTAL	5,258	1.8	1.8	1.9

Nonfatal Lost-time Injuries (Underground), 2013

Rate per 100 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Underground Number	Underground Rate	Underground Lower CI	Underground Upper CI
Coal Operator Sector	1,577	3.4	3.3	3.6
Metal Operator	166	2.4	2.0	2.7
Nonmetal Operator	38	1.3	1.0	1.8
Metal and Nonmetal Operator Sector	204	2.1	1.8	2.4
Stone Operator	36	1.9	1.3	2.6
Sand & Gravel Operator	NA	NA	NA	NA
Stone and Sand & Gravel Operator Sector	36	1.9	1.3	2.6
Operator Total	1,817	3.1	3.0	3.3
Coal Contractor	105	2.9	2.4	3.5
Noncoal Contractor	26	1.2	0.8	1.7
Contractor Total	131	2.3	1.9	2.6
TOTAL	1,948	3.1	2.9	3.2
Note: NA–Not applicable

Nonfatal Lost-time Injuries (Surface), 2013

Rate per 100 full-time equivalent employees; 95% confidence interval

Commodity, Type of Employer, Industry Sector	Surface Number	Surface Rate	Surface Lower CI	Surface Upper CI
Coal Operator Sector	551	1.3	1.2	1.4
Metal Operator	630	1.8	1.6	1.9
Nonmetal Operator	318	1.7	1.5	1.9
Metal and Nonmetal Operator Sector	948	1.8	1.7	1.9
Stone Operator	1,003	1.9	1.8	2.1
Sand & Gravel Operator	324	1.4	1.3	1.6
Stone and Sand & Gravel Operator Sector	1,327	1.8	1.7	1.9
Operator Total	2,826	1.7	1.6	1.7
Coal Contractor	166	0.9	0.8	1.1
Noncoal Contractor	318	0.8	0.7	0.9
Contractor Total	484	0.9	0.8	0.9
TOTAL	3,310	1.5	1.4	1.5

  

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