Quarry accidents in 1963 caused 61 fatal and 3,468 nonfatal injuries which occurred at respective frequency rates of 0.31 and 17.91 Per million man-hours of worktime. The fatality record in 1963 was better than in 1962 but was appreciably worse than in 1961. For nonfatal injuries, the 1963 record was slightly worse than in 1962 but was better than in 1961. The injury-severity rate of 2,913 days lost or charged per million man-hours in 1963 was better than that of 3,046 in 1962, the first year for which such data became available. The average severity of all injuries in 1963 was 160 days lost or charged per injury, 15 less than in 1962. An average of 91,960 men were at work on active days in 1963 and these men had an aggregate worktime of 193.7 million man-hours during the year.