Stone Operator Mining Facts - 2008 (HTML)
DHHS (NIOSH) Publication No. 2011-166
In 2008, a total of 4,633 stone mining operations reported employment to the Mine Safety and Health Administration (MSHA).  Stone mines comprised 31.1% of all mining operations.
- Mines producing the primary commodity of limestone (crushed and broken) comprised the largest number of operations (n=2,046; 44.2%).
- Stone mining operations were located in all states and territories except Delaware.
- Pennsylvania had the most stone mines (n=394; 8.5%), followed by Texas (n=360; 7.8%).
- Within the mining sectors,  stone mine operator employees accounted for 22.5% of all employee hours reported.
- Stone operator employee hours were reported for both underground (2.6%) and surface (97.4%) work locations. 
|Commodity and Type|
|Sand and Gravel Operator||78.9||78.1||77.0||75.3||74.8||76.6||78.4||79.6||76.7||66.7|
There were seven occupational fatalities among stone mine operator employees in 2008, compared to eight in 2007.
- The stone mine operator fatality rate was 10.6 [95% confidence interval (CI): 4.3, 21.9] fatalities per 100,000 FTE employees.
Nonfatal Lost-time Injuries
There were 1,626 nonfatal lost-time injuries (33 at underground and 1,593 at surface work locations) among stone operator employees occurring at an overall rate of 2.5 [CI: 2.4, 2.6] injuries per 100 FTE employees. A total of 75,970 days lost from work  resulted from these injuries, comprising 19.9% of days lost across all mining sectors.
- The nonfatal lost-time injury rate was 1.6 [CI: 1.1, 2.3] for underground and 2.5 [CI: 2.4, 2.6] per 100 FTE for surface work locations.
- The most frequent classification of nonfatal lost-time injuries for stone operator employees involved handling materials (n=571; 35.1%).
- Sprains and strains were the most frequently reported nature of injury (n=772; 47.5%).
- The back was the most frequently reported body part injured (n=282, 17.3%) and accounted for 11,936 days lost from work.
|Slip or fall of person||24.4|
Mining operations, 2008
|Commodity and Type of Employer||Underground Mining Operations ||Surface Mining Operations ||Total Mining Operations |
|Sand & Gravel||Not applicable||7,132||7,132|
Contracting companies, 2008
|Commodity and Type of Employer||Number of Companies|
Employment characteristics, 2008
|Commodity and Type of Employer||Underground Employees ||Surface Employees ||Total Employees ||Underground FTE Employees ||Surface FTE Employees ||Total FTE Employees |
|Sand & Gravel Operator||Not applicable||42,307||42,307||Not applicable||33,343||33,343|
Mining Occupational Fatalities (per 100,000 FTE employees), 2008
|Commodity and Type of Employer||Underground Fatalities||Underground Fatality Rate||Surface Fatalities||Surface Fatality Rate||Fatalities||Fatality Rate|
|Metal Operator||3||Not Calculated||2||Not Calculated||5||13.8|
|Nonmetal Operator||1||Not Calculated||1||Not Calculated||2||Not Calculated|
|Stone Operator||1||Not Calculated||6||9.4||7||10.6|
|Sand & Gravel Operator||Not applicable||Not applicable||3||Not Calculated||3||Not Calculated|
|Coal Contractor||3||Not Calculated||9||43.4||12||48.3|
|Noncoal Contractor||0||Not Calculated||5||13.9||5||13.2|
|Contractor Total||3||Not Calculated||14||24.7||17||27.1|
Nonfatal Lost-time Injuries (per 100 FTE employees), 2008
|Commodity and Type of Employer||Underground Injuries||Underground Injury Rate||Surface Injuries||Surface Injury Rate||Injuries||Injury Rate|
|Sand & Gravel Operator||Not applicable||Not applicable||550||1.9||550||1.9|
Not calculated when N is less than 5. 95% CI for rates reported above. Totals may not sum due to independent rounding.
Data source: Publicly released employment and accident/injury/illness data 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. Caution should be used when interpreting rates based on a small number of events.
- Mines at which only independent contractors were working did not show any employment and were not counted.
- Average number of employees working at individual mines during calendar quarters of active operations (includes office workers).
- Full-time equivalent employees computed using reported employee hours (2,000 hours = 1 FTE).
- Mining sectors include coal operators, metal operators, nonmetal operators, stone operators, sand and gravel operators, coal contractors, and noncoal contractors.
- 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.
- 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.
To receive NIOSH documents or more information about occupational safety and health topics, contact NIOSH at 1-800-CDC-INFO (1-800-232-4636), TTY: 1-888-232-6348, e-mail: firstname.lastname@example.org, or visit the NIOSH Web site.
- Page last reviewed: 3/2/2015
- Page last updated: 3/28/2014
- Content source: National Institute for Occupational Safety and Health, Mining Program