Class of operation and use 
 1966 1967 
Quantity Value Quantity Value 
603 
1,484 
154 
149 
 $932 434 $668 
 1,253 1,302 1,170 
 146 148 98 
 243 261 26 
 2,390 2,574 2,145 2,212 
75 
3,690 
320 
13 
 34 44 
 7,965 8,637 
 1,006 526 
 96 71 
 4,098 9,101 9,278 
1,007 
4,943 
466 
256 
 468 712 
 9,267 9,807 
 1,154 624 
 357 347 
THE MINERAL INDUSTRY OF IDAHO 
271 
 
percent. Output by commercial producers (2.1 million tons) was moderately
lower than for the previous year, reflecting a general curtailment in the
light construction industry. 
 Del Monte Properties Co., a producer of quality sand for plaster, glass,
abrasive, and other specialty uses, began constructing a $400,000 sand beneficiation
plant west of Emmett, Gem County. Productive capacity of the new plant will
be more than double that of the 
older facility, which was scheduled for replacement. 
 Production exceeded 1 million. tons each in Jerome, Canyon, and Twin Falls
Counties owing largely to State highway department projects underway in the
respective counties. Sand and gravel production was reported from operations
in 36 of the 44 counties in the State; however, significant tonnages also
were produced which could not be as$gned to a specific county of origin.

 
Table 14.—Sand and gravel sold or used by producers, by classes of
operations and uses (Thousand short tons and thousand dollars) 
 
 
 
 
 
Commercial operations: 
Building 
Roadmaterial 
Fill 
Other' 
 
Total 
 
Government-and-contractor operations: 
 Building 102 
 Roadmaterial 4,489 
 Fill 550 
 Other' 13 
 Total 5,154 
 
All operations: 
 Building 70 
 Road material 5,97 
 Fill 704 
 Other '  162 
 Grand total 7,544 6,672 11,246 11,490 
 
 
' Includes special sands, railroad ballast, and sand and gravel used for
miscellaneous purposes. 
 
 Stone.—Production of stone for all purposes declined 26 percent (708,000
tons) from the 1966 total. Curtailed production by commercial producers and
reduced demand by the State highway department, Bureau of Public Roads, and
U.S. Forest Service all contributed to the decline. Production for commercial
markets totaled 724,000 tons, a 24-percent drop from the 946,000-ton total
of the previous year. Governmentand-contractor tonnages (largely production
by contractors for Federal, State, county, and municipal agencies) was 1.3
million tons compared with 1.7 million tons in 1966. 
 Basalt was quarried in the greatest tonnages. Output was used mainly as
a road base and surfacing material; smaller quantities were used as rubble
and riprap. Limestone production increased moderately and was used principally
in sugar refining and for cement manufacture. Sandstone and quartzite production
dropped sharply owing largely to reduced demand by State *and Federal agencies.
Stone production was reported from 17 counties; in addition, significant
tonnages were produced which could not be assigned to specific counties of
origin.