190 32 252 -- 2 7.92 
 239 15 127 -- 4 31.61 
812 
1,636 
 191 39 312 -- 3 9.60 
 234 11 98 -- 4 41.02 
189 
728 
702 
MINERALS YEARBOOK, 1967 
 
 
Table 3.—Employment and injury experience in the mineral industries

 Average  menYear and industry work-  ing  daily 
Days 
Active 
Man- 
days 
worked 
(thou- 
sands) 
Man- Number of hours injuries worked———         (thou-
Fatal Non- 
sands) fatal 
Injury rates per million man-hours 
 —        Fre- Severity quency 
1966: 
 Sand and gravel 167 
 Stone 61 
 Total 228 203 46 379 6 15.83 1,087 
 
1967: P 
 Sand and gravel 205 
 Stone 45 
 Total 250 199 50 410 -- 7 17.08 317 P Preliminary. 
 
REVIEW BY MINERAL COMMODITIES 
 Gem Stones.—Miscellaneous gem stone specimens recovered included actinolite,
agate, fluorescent calcite, and pegmatite minerals. Most of the minerals
were collected from mine dumps and quarries at various sites, located chiefly
in the northern part of the State. 
 
 Sand and Gravel.—Sand and gravel continued to be the principal mineral
produced in the State. Total production was 2.3 million short tons, about
the same as in 1966, but slightly higher in value. Kent County accounted
for more than half of the output and replaced Providence County as the largest
producer of sand and gravel in the State. Washington and Newport Counties
produced only small quantities. Production was reported by 15 companies,
one less than in 1966, all with stationary processing plants. Seventy-six
percent was washed and screened. 
 Sand accounted for 38 percent of tonnage and 35 percent of value of the
total sand and gravel produced. A total of 884,000 tons of sand was sold
in 1967 compared with 921,000 tons in 1966. About 49 percent of the production
was used for building purposes, 33 percent for paving, and the remainder
for drainage, ice control, foundry sand, etc. The average value per short
ton increased from $0.94 
in 1966 to $0.95 in 1967. Values ranged from $0.98 to $1 for building and
paving sand to $0.42 for fill. Most of the sand for building and paving use
was processed. Virtually all the sand was shipped by truck. 
 Gravel production was 1.5 million tons, compared with 1.4 million tons in
1966. The gravel was chiefly used for building, paving, highway construction,
and fill. Average value of gravel, f.o.b. plant, was $1.09 per ton, compared
with $1 per ton in 1966. Price range for washed gravel was $1.21 to $1.34
per ton, and unprocessed gravel was $0.53 per ton. Transportation to consumer
was mainly by truck. 
 
 Stone.—The output of stone was 481,000 tons, compared with 535,000
tons in 
1966. The total value was $1.6 million, compared with $1.7 million in 1966.
Dimension granite was quarried in Washington County. Crushed limestone, miscellaneous
stone consisting of granitized schist, and a small quantity of dimension
limestone were produced in Providence County. Crushed limestone was used
as fertilizer filler; miscellaneous stone was used for concrete aggregate,
riprap, and roadstone. Newport County produced some crushed miscellaneous
stone for use as concrete aggregate.