W Withheld to avoid disclosing individual company confidential data; included
with "Undistributed."1 Less than ~ unit.204 
MINERALS YEARBOOK, 1967 
 
 Pumice.—The output of pumice-type material dropped substantially from
46,000 to 18,000 tons. The decrease was due primarily to less demand for
pumice-type material for concrete aggregate and railroad ballast. Other uses
were for roofing aggregate, road construction, and rock gardens. 
 Scoria was produced by Colorado Aggregate Co., Inc., in Costilla County
and McCoy Aggregate Co. in Routt County, and volcanic cinders were produced
by Dotsero Block Co. and Roaring Fork Pumice Co. in Eagle County. 
 
 Pyrites.—Climax Molybdenum Co. produced most of the output as a byproduct
from molybdenum ore mined at the Climax mine in Lake County. The output,
13 percent less than in 1966, was sold mostly for use in manufacturing sulfuric
acid. Rico Argentine Mining Co. sold a small quantity of pyrites produced
from the Rico Argentine mine in Dolores County. 
 
 Salt.—Output of salt, slightly less than that in 1966, was obtained
by Union Carbide Corp. from a brine well in Montrose. The product was used
at the company's 
Uravan mill in processing uraniumvanadium ores. 
 
 Sand and Gravel.—The value and output of sand and gravel declined
2 percent. Based on value, sand and gravel was the fourth highest of all
mineral commodities produced in the State—$22.9 million, 6.6 percent
of the total State mineral output 
value. - 
 Only 1.3 million tons of sand and gravel were produced as pit-run material.
The balance of the total output of 21.8 million tons underwent some processing—washing,
screening, crushing—before it left the pit. Gravel production was 18.0
million tons, 83 percent of the total; that of sand, 3.8 million tons or
17 percent. The average price per ton for gravel was $1.04 and for sand $1.11.

 Road construction and maintenance required 15.2 million tons of sand and
gravel, 472,000 tons below that of 1966. Sand and gravel used for building
construction was 4.5 million tons, 700,000 tons less than that in 1966. Engine
sand, fill, filtration, railroad ballast, and miscellaneous purposes absorbed
the remaining 2.1 million tons. 
 
Table 17.—Sand and gravel production in 1967, by counties 
 
(Thousand 
short ton 
s and thousand dollars) 
 
 
County 
Quantity 
Value 
County 
Quantity 
Value 
Adams                   
Ala,mosa                  
Arapahoe                 
Archuletá                 
3,057 
222 
1,011 
350 
$3,133 
172 
1,141 
346 
LaPlata                  
Larimer                  
LasAnimas                
Lincoln                   
385 
1,099 
83 
92 
$418 
1,102 
94 
71 
Baca                     
Bent                     
Boulder                  
146 
75 
1,789 
147 
79 
1,715 
Logan                    
Mesa                    
Moffat                   
359 
463 
158 
3~3 
~27 
191 
Chaffee                   
Cheyenne                 
ClearCreek               
192 
(1) 
143 
200 (0 
234 
Montezuma                
Montrose                 
Morgan                   
212 
772 
272 
204 
782 
317 
Conejos                   
Costilla                   
W W 
W W 
Otero                    
Ouray                    
W 75 
W 74 
Crowley                  
Custer                   
10 
90 
10 
87 
Park                     
Phillips                   
31 
47 
31 
55 
Delta                    
240 
322 
Pitkin                    
218 
241 
Dolores                   
124 
124 
Prowers                  
185 
230 
Douglas                  
Eagle                    
Elbert                    
754 
1,691 
238 
742 
1,322 
266 
Pueblo                   
Rio Blanco                
Rio Grande                
1,033 
W 
154 
1,131 
W 
185 
El Paso                   
Fremont                  
Garfield                  
Gilpin                    
Grand                    
Gunnison                 
Hinsdale                  
Huerfano                 
1,023 
68 
217 
W 
242 
164 
6 
497 
1,200 
129 
320 
W 
237 
196 
6 
497 
Routt                    
Saguache                 
San Juan                 
San Miguel                
Sedgwick                 
Summit                   
Teller                    
Washington                
104 
212 
18 
107 
61 
72 
W 256 
123 
208 
18 
87 
58 
89 
W 251 
Jackson                  
12 
12 
Weld                     
525 
456 
Jefferson                  
Kiowa                    
Kit Carson                
Lake                     
1,620 
144 
59 
204 
1,936 
172 
59 
222 
Yuma                   Undistributed              
 
Total               
 207 204 222 268 
 
  
 21,810 22,904