Injury experience at coal mines and mechanical-cleaning plants (excluding officeworkers) in 1967 was 222 fatal and 10,115 nonfatal disabling work injuries during an exposure time of 241.8 million man- hours. These injuries occurred at a frequency rate of 42.75 Per million man-hours worked; the severity rate was 7,699 days lost or charged per million man-hours. Each of these general measures of injury experience was lower than similar data recorded for 1966. Employment at 6,885 coal mines and 569 mechanical- cleaning plants, excluding officeworkers, averaged 139,312 men in 1967. The average number of days worked was 220. Coal production totaled 560.8 million short tons, at rates of 2.32 Tons per man-hour and 18.32 Tons per man-day. A total of 2,779 onsite officeworkers at coal mines and mechanical-cleaning plants worked 5.2 million man- hours in 1967 without a disabling work injury.