Stone Operator Mining Facts - 2007 (HTML)
DHHS (NIOSH) Publication No. 2009–162
In 2007, a total of 4,639 stone mining operations reported employment data to the Mine Safety and Health Administration (MSHA).  Stone mines comprised 31.2% of all mining operations.
- Mines producing the primary commodity of limestone (crushed and broken) comprised the largest number of operations (n=2,051; 44.2%).
- Stone mining operations were located in all states and territories except Delaware and North Dakota.
- Pennsylvania had the most stone mines (n=373; 8.0%), followed by Texas (n=352; 7.6%).
- Within the mining sectors,  stone mine operator emloyees accounted for 24.7% of all employee hours reported.
- Stone operator employee hours were reported for both underground (2.5%) and surface (97.5%) work locations. 
|Commodity and Type|
|Sand and Gravel Operator||75.0||78.9||78.1||77.0||75.3||74.8||76.6||78.4||79.6||76.7|
There were eight work-related fatalities among stone mine operator employees in 2007. These fatalities all occurred at surface work locations.
- The stone mine operator fatality rate for surface work locations was 11.4 fatalities per 100,000 FTE employees.
Nonfatal Lost-time Injuries
There were 1,880 nonfatal lost-time injuries (36 at underground and 1,844 at surface work locations) among stone operator employees occurring at an overall rate of 2.6 injuries per 100 FTE employees. A total of 85,639 days lost from work  resulted from these injuries, comprising 20.1% of days lost across all mining sectors.
- The nonfatal lost-time injury rate was 1.7 for underground and 2.6 for surface work locations.
- The most frequent classification of nonfatal lost-time injuries for stone operator employees involved handling materials (n=689; 36.6%).
- Sprains and strains were the most frequently reported nature of injury (n=843; 44.8%).
- The back was the most frequently reported body part injured (n=378; 20.1%) and accounted for 15,317 days lost from work.
|Slip or fall of person||470||25.0|
|Fall of ground||210||11.2|
Mining operations, 2007
|Commodity and Type of Employer||Underground Mining Operations ||Surface Mining Operations ||Total Mining Operations |
|Sand & Gravel Operator||Not applicable||7,199||7,199|
Contracting Companies, 2007
|Commodity and Type of Employer||Number of Companies|
Employment characteristics, 2007
|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||45,761||45,761||Not applicable||38,340||38,340|
Mining Occupational Fatalities (per 100,000 FTE employees), 2007
|Commodity and Type of Employer||Underground Fatalities||Underground Fatality Rate||Surface Fatalities||Surface Fatality Rate||Fatalities||Fatality Rate|
|Sand & Gravel Operator||Not applicable||Not applicable||5||15.0||5||15.0|
Nonfatal Lost-time Injuries (per 100 FTE employees), 2007
|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||657||2.0||657||2.0|
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. Data in the above tables may not add to totals shown because of independent rounding. 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 website.