DEPARTMENT OF HEALTH AND HUMAN SERVICES

Centers for Disease Control and Prevention

National Institute for Occupational Safety and Health

September 2008

COAL CONTRACTOR

MINING FACTS – 2006

The Mine Safety and Health Administration 

(MSHA) defines an independent contractor 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.

Companies

In 2006, a total of 2,724 contracting companies

reported employment at coal mines to MSHA, or 

36.8% of all independent contracting companies.

Employees

A total of 37,282 employees,

1

corresponding to 

23,078 full-time equivalent (FTE)2employees, were 

reported by coal contractors to MSHA.

Within the mining sectors,3coal contractor 

employees comprised 7.0% of all employee 

hours reported to MSHA.

Coal contractor employee hours were reported 

for both underground (12.6%) and surface 

(87.4%) work locations.4

0

50

100

150

200

1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 Number of Employee Hours (millions) Coal Operator Metal Operator Nonmetal Operator Stone Operator Sand & Gravel Oper Coal Contractor Noncoal Contractor

Note: Beginning with the 2006 Mining Fact Sheets, hours reported to MSHA for office 

employees are included in number of employee hours.

Fatalities

Five occupational fatalities occurred among coal 

contractor employees in 2006. These coal fatalities 

accounted for 41.7% of all contractor fatalities.

The coal contractor fatality rate was 22.7 fatalities 

per 100,000 FTE employees. The underground 

fatality rate was 34.4 (n=1) compared to a rate of 

20.9 (n=4) for surface work locations.

0

1

2

3

4

5

6

2002 2003 2004 2005 2006 Number of Fatalities

0

45

90

135

180

225

270 Fatality Rate (per 100,000 Full-time Equivalent Employees)

Underground Surface

UG Rate Surf Rate

Nonfatal Lost-time Injuries

There were 557 nonfatal lost-time injuries among 

coal contractor employees (215 at underground and 

342 at surface work locations) occurring at a rate of 

2.5 injuries per 100 FTE employees. These injuries 

resulted in 27,332 days lost5from work.

The underground nonfatal lost-time injury rate 

was greater than the surface injury rate (7.4 vs. 

1.8 per 100 FTE workers). 

The most frequent classification of nonfatal losttime injuries for coal contractor employees 

involved handling materials (n=166; 29.8%), 

followed by slip or fall of person (n=122; 

21.9%).

Sprains and strains were the most frequently 

reported nature of injury (n=187; 33.6%).

The back was the most frequently reported body 

part injured (n=74; 13.3%) and accounted for 

3,716 days lost from work.

Distribution of Nonfatal Lost-time Injuries by Accident Class, 2002-2006

31%

12% 8% 6% 7%

23%

13%

Handling materials Slip or fall of person Powered haulage Machinery Hand tools

Fall of ground All other

Note: "Fall of ground" includes MSHA's Accident/Injury/Illness classification for fall of face, rib, pillar, 

side, or highwall (from in place); fall of roof, back, or brow (from in place); and underground machinery 

cases when the source of injury was caving rock, coal, ore, or waste.
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occupational safety and health topics, contact NIOSH at

1–800–CDC–INFO (1–800–232–4636)

1–888–232–6348 (TTY)

e-mail: cdcinfo@cdc.gov

or visit the NIOSH Web site at http://www.cdc.gov/niosh

DHHS (NIOSH) Publication No. 2008-164

Commodity and 

Type of Employer Surface Total Surface Total Surface Total 

Coal Operator 675 1,438 2,113 38,253 47,440 85,693 42,598 51,897 94,495

Metal Operator 92 188 280 4,539 28,335 32,874 4,575 29,397 33,972

Nonmetal Operator 46 695 741 2,374 20,677 23,051 2,415 20,806 23,221

Stone Operator 122 4,451 4,573 1,877 80,706 82,583 2,154 83,247 85,402

Sand and Gravel Operator NA 7,178 7,178 NA 46,069 46,069 NA 39,796 39,796

Operator Total 935 13,950 14,885 47,043 223,227 270,270 51,742 225,144 276,886

Coal Contractor NA NA 2,724 4,762 32,520 37,282 2,903 20,175 23,078

Noncoal Contractor NA NA 4,686 1,815 54,130 55,945 1,401 29,893 31,294

Contractor Total NA NA 7,410 6,577 86,650 93,227 4,304 50,068 54,372

TOTAL 53,620 309,877 363,497 56,046 275,212 331,258

Number of Mining Operations Number of Employees1 Number of FTE Employees2

Mine and Employment Characteristics, 2006

Number of Companies

Underground Underground Underground Commodity and 

Type of Employer

Coal Operator 36 84.5 6 12.4 42 46.2 2,218 5.2 803 1.7 3,021 3.3

Metal Operator 0 0.0 3 11.9 3 10.1 141 3.1 524 2.1 665 2.2

Nonmetal Operator 0 0.0 0 0.0 0 0.0 73 3.0 344 2.0 417 2.1

Stone Operator 0 0.0 10 13.8 10 13.4 43 2.0 2,038 2.8 2,081 2.8

Sand and Gravel Operator NA NA 6 17.2 6 17.2 NA NA 795 2.3 795 2.3

Operator Total 36 69.6 25 12.6 61 24.4 2,475 4.8 4,504 2.3 6,979 2.8

Coal Contractor 1 34.4 4 20.9 5 22.7 215 7.4 342 1.8 557 2.5

Noncoal Contractor 0 0.0 7 24.8 7 23.6 49 3.5 403 1.4 452 1.5

Contractor Total 1 23.2 11 23.2 12 23.2 264 6.1 745 1.6 1,009 2.0

TOTAL 37 66.0 36 14.6 73 24.2 2,739 4.9 5,249 2.1 7,988 2.6

Rate

Mining Occupational Fatalities and Injuries, 2006

Total Underground Surface Total

Nonfatal Lost-time Injuries (per 100 FTE employees)

 No. Rate No. No. Rate Rate 

Occupational Fatalities (per 100,000 FTE employees)

Underground Surface

Rate Rate No. No. No.

NA Not applicable.

Data source: Publicly released data files of employment and accident/injury/illness collected by MSHA under 30 CFR 50.

Notes: All analyses of accident data exclude office employees. Occupational fatalities exclude all cases under 17 years of age. Further 

statistical methodology is available on the NIOSH Internet [http://www.cdc.gov/niosh/mining/statistics/method.htm].

1Number of employees is the average number of employees working at individual mines during calendar quarters of active operations.

2 Full-time equivalent employees computed using reported employee hours (2,000 hours = 1 FTE).

3Mining sectors: coal operators, metal operators, nonmetal operators, stone operators, sand and gravel operators, coal contractors, and

noncoal contractors.

4

Surface work locations include surface operations at underground mines, surface operations (strip or open pit), auger, culm banks, 

dredge, other surface operations, independent shops and yards, and mills or preparation plants.

5

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.