(Thousand short tons and thousand dollars) 
 2,057 $2,511 2,072 $2,364 
 330 390 385 437 
 ' 19 ' 24 
 120 113 329 328 
 15 7 (1) (1) 
 3 11 
 (1) (1) 
 11 42 8 30 
 2,784 3,590 2,353 3.132 
 4,447 4,759 5,144 5,640 
 1 1 24 22 
 540 412 452 298 
 26 30  - 
 65 77 318 416 
 7 7 186 209 
 1,470 1,457 739 711 
 22 22 55 61 
 1 1 
 1,486 981 P82 
 374 333 518 527 
 9,436 9,283 7,146 6,775 
 540 451 2,054 1,866 
   4 2 
   9,722 9,170 
 4,549 3,797 4,226 
 18,936 18,013 18,678 
  21,810 22,904 
THE MINERAL INDUSTRY OF COLORADO 
205 
 
Table 18.'—Sand and gravel sold or used by producers, by classes of
operations and uses 
 
. 
Class of operation and use 
 1966 —_1967 
Quantity Value Quantity Vales 
Commercial operations: 
Sand: 
Construction: 
Building 
Paving 
Railroad ballast 
Fill 
Other 
Industrial: 
Blast 
Fire or furnace 
Engine 
 Total 2,533 3,063 2,816 3,244 
 
Gravel: 
Construction: 
Building 
Paving 
Railroad ballast 
FilL. 
Other 
Miscellaneous 
 Total 7,863 8,869 8,291 9,308 
 Total sand and gravel 10,396 11,932 11,107 12,732 
 
Government-and-contractor operations: 
Sand: 
Building 
Paving 
Fill 
Other 
 Total 1,499 
 
Gravel: 
Building 
Paving 
Fill 
Other 
 Total 10,350 10,067 
 Total sand and gravel 11,849 11,553 10,703 ~ 10,150 
 
All operations: 
 Sand 4,032 
 Gravel 18,213 
 Total 22,245 23,485 
 
 1 Railroad ballast, "Other (construction)," and fire or furnace sand combined
to avoid disclosing iiidbridual company confidential data. 
 2 Data does not add to total shown because of independent rounding. 
 
 The output was divided almost evenly between commercial producers and Government-crews-and
contractors with production from them being 11.1 million tons and 10.7 million
tons, respectively. Of 395 producing operations, 161 were worked by commercial
producers and 234 by Government-crews or contractors. In order of output,
the leading commercial producers were Western Paving Construction Co., Cooley
Gravel Co., The Brannan Sand & Gravel Co., Broderick & 
Gibbons, Inc., Pre-Mix Concrete, mc., Flatiron Sand & Gravel Co., Asphalt
Paving Co., and Boulder Gravel Products, Inc. Each had outputs exceeding
4~i0,0O0 tons; total output was 5 million tons, 23 percent of the State output.

 Of the 63 counties in the State, only Denver and Mineral Counties had no
production; in 1966 Denver, Gilpin, and San Juan Counties reported none.
Comparing the counties that had production both years, 32 had decreases in
output, 26 had