APPENDIX B

Data pertaining to serious hazards in coal mines, fiscal year ended June 30, 1951

TABLE 1.-Number of fatal and nonfatal injuries and injuries per million man-hours exposure, portal to portal, in coal mines of the United States

APPENDIX D

Number of coal mines operated in the United States, fiscal year ended June 30, 1951

TABLE 1.—Number of regular Federal inspections, surveys, and investigations of fatal coal mine accidents completed since 1941

1 Includes those surveys that personnel of the branch made or assisted in making. : Covers fiscal years 1942-45, inclusive.

TABLE 2.-Average number of times coal mines were inspected, fiscal year ended

TABLE 3.-Average actual time required to inspect coal mines and prepare the inspection reports, fiscal year ended June 30, 1951

Phoenix, Ariz..

1.4 1.0 2.8 1.2 3.9 1.1 5.5 1.4 8.2 1.2 1.7
1.2.5 2.9 .6 2.8 .7 4.4 1.0 7.5 2.0 .9
.8 1.0 1.0 1.0

.7 1.7 1.0

2.7

.5 2.2.7

2.9

.8 1.0

1.8

1.9 1.0 2.2 1.0 3.8 1.2

.9 .7 2.3 .6 3.3 .6 5.0 .6 7.0
.9 .8 2.9 1.2 5.4 1.3 10. 2 1.9

2.0 1.4 2.1 1.2
1.2 1.1 1.9 1.6
.6 1.1.7 1.3 .6
.8 .7 1.4 .9
1.6 1.1 2.5 1.1 4.5 1.1 6.5 1.1 9.6 1.1 1.3 .6 3.0 1.1
1.3 1.0 2.3 1.0 4.9 1.1 8.4 1.2 11.9 1.2 1.5 .7 2.6 1.0
1.0 1.1 1.7 1.1 4.2 1.2 5.9 1.2 7.4 1.0 1.1 .7 1.6 1.0
1.8 1.1 2.9 1.1 4.4 1.1 7.4 1.0 8.8 1.0 1.6 1.1 2.6 1.1
1.0 1.0 1.7 9 3.6 .9 5.7 .9 8.4 1.1
.9 .9 1.6 1.0 3.5 1.0 5.9 1.111.4 1.6
1.4 .9 2.0 1.0 4.3 1.0 6.1 1.2 11.0 1.3 1.3
1.0 .9 1.8 1.0 4.4 1.2 8.3 1.3 15.0 1.2 .6
1.2 .9 2.1 1.0 4.0 1.0 6.4 1.1 11.1 1.2 1.1

A-Average days to complete inspection. Includes inspection, travel, preparing and posting preliminary report, conference with mine personnel, and preparing data book and sampling cards. B-Average days for inspector to prepare rough draft of final inspection report.

3.3

1.5 1.7 2.2 1.7 3.3 1.8 5.1 1.9

3.5

1.9

2.3

4. 1

3.6

2.6

3.7

FATAL INJURIES PER MILLION MAN HOURS EXPOSURE (PORTAL TO PORTAL)