620 
MINERALS YEARBOOK, 1967 
 
 
Table 8.—Sand and gravel sold or used by producers, by classes of operations
and uses 
(Thousand short tons and thousand dollars) 
1966 
Class of operation and use 
 Quantity Value Quantity 
 
1967 
Value 
Commercial operations: 
Sand: 
Construction: 
 Building 538 Paving 927 Fill 121 Other 1 
 Total 1,587 
 
Gravel: 
Construction: 
 Building 516 Paving 2,524 Railroad ballast 207 
 Fill 215 
 Miscellaneous 10 
 Total 3,472 
 Total sand and gravel 5,059 
Government-and-contractor operations: 
 Sand: Paving 2,144 
 
Gravel: 
 Building 128 Paving 2,772 Fill 42 
 Total 2,942 Total sand and gravel 5,086 
 
All operations: 
 Sand 3,731 
 Gravel 6,414 
 Total 10,145 
 $645 349 889 565 101 142 1 1 
$415 
621 
138 
1 
 
 1,636 1,057 
1,175 
 
 737 333 3,106 2,520 103 111 169 101 4 41 
647 
2,600 
46 
72 
46 
 
 4,119 3,106 
3,411 
 
 5,755 4,163 2,034 1,595 
4,586 
 
1,577 
 
128 
 2,609 3,064 42 
2,955 
 
 2,779 3,064 
2,955 
 
4,8134,659 
4,532 
 
 3,670 2,652 6,898 6,170 
2,752 
6,366 
 
 10,568 8,822 
9,118 
 
sand atid gravel produced remained essentially unchanged at $1.03 per ton.

 
 Stone.—Production of stone increased 251 percent and exceeded $1 million
in value for the first time. Concrete and roadstone accounted for 69 percent
of the quantity and 75 percent of the value. The remainder of the production
was used for riprap on flood control projects of the U.S. Army Corps of Engineers,
and by the North Dakota Water Commission. 
 
 Sulfur—Elemental sulfur was recovered at natural gas processing plants
at Lignite in Burke County and at Tioga in Williams County. The value of
the sulfur shipped increased 16 percent over that of 
1966. 
 
METALS 
 
 Iron Ore.—Economically valuable iron ore could be the cause of magnetic
anomalies in Pembina County. Deep drill- 
ing was recommended by geologists to delineate any ore. The availability
of North Dakota lignite could prove to be the key for economic utilization
of iron ore. 
 
 Molybdenum.—Only one company, Mining and Metals Division, Union Carbide
Corp., reported recovery of molybdenum from lignite ash contained in lignite
ores mined in Billings and Stark Counties. Value of production increased
12 percent over 1966. 
 
 Uranium.—Production of uranium oxide from uraniferous lignites continued
to decrease, the value being 9 percent of the 1966 production value. Only
two operators reported production—Union Carbide Corp. and Geo Resources,
Inc., in Billings and Stark Counties. The ash obtained from the burning of
strip-mined lignite ores was shipped to mills in Colorado ~or recovery of
uranium and molybdenum.