THE MINERAL INDUSTRY OF OREGON 667 
 
Table 5.—Employment and injury experience in the mineral industries

Year and industry 
Average 
men 
working 
daily 
Days 
Active 
Man- 
days 
worked 
(thou- 
sands) 
Man- 
hours 
worked 
(thou- 
sands) 
Number of injuries 
——————— Fatal Non- 
fatal 
Injury rates per million man-hours 
———— Fre- Severity quency 
1966: 
Coaland peat         
Metal               
Nonmetal            
Sand and gravel        
Stone                
Total2             
1967:P 
Coalandpeat         
Metal               
Nonmetal         
Sand and gravel        
Stone                
Total 2                      
4 
143 
181 
4,463 
1,840 
49 
219 
177 
218 
233 
(1) 
31 
32 
973 
428 
2 
251 
256 
7,815 
3,428 
1 6 13 166 86 
27.86 24,66150.86 86521.24 64125.09 475 
 
6,631 
221 
1,465 
11,751 
1 271 
23.15 1,111 
 
10 
150 
145 
2,145 
1,115 
63 
203 
165 
206 
237 
1 
30 
24 
441 
265 
6 
245 
194 
3,384 
2,102 
 11 2 741 59 
44.91 1,82110.29 1,42521.87 44128.54 3,426 
 
3,570 
213 
761 
5,931 
1 146 
24.78 1,588 
P Preliminary. 
1 Less than 3/~ unit 
2 Data may not add to totals shown because of independent rounding. 
total of $704,190 has been given to 38 tract for work on a gold-silver property

States. (Argonaut claim) in Baker County. There 
 In October, the Office of Minerals Ex- were no other contracts active during
the 
ploration (OME) approved a $34,440 con- year. 
 
REVIEW BY MINERAL COMMODITIES 
 
NONMETALS 
 
 Abrasives and Roofing Granules.— Pacific Abrasive Supply, Portland,
and Mining Mineral Manufacturing Co., Riddle, continued to dry, screen, and
bag granulated slag for aithlasting purposes, especially for cleaning ship
hulls. The unprocessed slag for the Portland plant was obtained from an abandoned
copper smelter site at Grand Forks, British Columbia, Canada. The Riddle
plant was supplied from the Hanna Nickel Smelting Co. operation. Production
of roofing granules by Flintkote Co., Pioneer Division, declined slightly
compared with the 1966 total. 
 
 Cement.—Cement production and shipments were 27 percent less than
those of 1966 because of the April closure of the Ideal Cement Co. plant
at Gold Hill, Jackson County. The plant was converted to a storage and distribution
terminal for cement manufactured at the firm's new Seattle, Wash., plant.
Oregon Portland Cement Co. continued production from its Lime, Baker County,
and Lake Oswego, 
Clackamas County, plants. A $5.75-million construction and modernization
program for the Lake Oswego plant started in 1966 was completed by midyear.
The rated annual capacity was raised from 2.0 million to 3.5 million barrels,
making it the largest cement operation in the Pacific Northwest. 
 Destinations of shipments were chiefly within the State; out-of-State shipments
were made to Washington, Idaho, and northern California. Shipments of portland
cement were distributed to ready-mixed concrete companies, 71.5 percent;
to concrete-product manufacturers, 11.7 percent; to general contractors,
10.9 percent; to building material dealers, 3.6 percent; and to highway contractors
and to Federal, State, and local government agencies, 2.3 percent. Trucking,
the principal method of transportation, accounted for 88 percent of the portland
cement shipped; the remainder went by rail. The ratio of bulk to paper-bag
shipments was about 10:1. 
 Combined shipments from four plants in Oregon and Nevada were 3.5 million
barrels (376 pounds each) of finished portland cement; the same plants shipped
4.5