THE MiNERAL INDUSTRY OF IOWA 319 
 
 
Table 5.—Sand and gravel sold or used by producers, by classes of operations
and uses 
(Thousand short tons a 
nd thousand dollars) 
1966 
1967 
Class of operation and use 
 
 
 
Quantity Value Quantity Value 
 
Commercial operations: 
Sand: 
 Building 3,054 $2,899 3,030 $2,966 
 Paving 2,715 2,659 2,828 2,852 
 Railroad ballast 4 2 W W 
 Fill 1,112 721 1,147 736 
 Other 1 204 532 114 320 
 Total — 7,089 6,813 7,119 6,874 
 
Gravel: 
 Building 1,278 2,213 1,361 2,289 
 Paving 7,032 6,524 6,699 5,778 
 Railroad ballast 69 46 44 36 
 Fill 336 198 164 103 
 Other 32 41 18 15 
 Total 8,747 9,022 8,286 8,221. 
 Total sand and gravel 15,836 15,835 15,405 15,095 
 
Government-and-contractor operations: 
Sand: 
 Building   3 i 
 Paving 98 51 72 40 
 Fill 15 5 3 1 
 Other 2 1 2 1 
 Total 115 57 80 43 
 
Gravel: 
 Paving. 3,680 2,317 2,249 1,426 
 Other                                           13 4_________________ 
 Total 3,693 2,321 2,249 1,426 
 Total sand and gravel 3,808 2,378 2,329 1,469 
 
All operations: 
 Sand 7,204 6,870 7,199 6,917 
 Gravel 12,440 11,343 10,535 9,647 
 Total 19,644 18,213 17,734 16,564 
W Withheld to avoid disclosing individual company confidential data; included
with "Other." 1 Includes filtration and railroad ballast (1967), blast, molding,
and other construction sand. 
 
 
 
Table 6.—~Limestome sold or used by producers, by uses 
1966 
 
1967 
 
Use 
Value 
 
Value 
Quantity 
(thou- 
 
 
 
sands) 
Quantity 
(thou 
 
 
 
sands) 
Dimension: 
 Rubble thousand short tons - 3 $28 3 $25 
 Sawed stone thousand cubic feet - 2 10 6 22 
 House stone veneer do -- - 24 61 26 68 
 Cut stone do..~. 73 116 68 128 
 Flagging do.... 4 5 5 6 
 Total approximate thousand short tons 1 12 220 12 249 
 
Crushed and broken: 
 Riprap thousand short tons - 991 1,436 387 450 
 Concrete aggregate and roadstone do~~~_ 19,746 27,899 19,119 27,024 
 Agriculture do.. 2,857 4,831 2,488 4,421 
 Railroad ballast do.. 164 156 169 173 
 Cement dn.... 3,628 4,232 3,664 4,295 
 Other2 do...  331  1,308  295  1,299 
 Total' do 27,717 39,861 26,120 37,663 
 Grandtotal3 do..~ 27,729 40,081 26,133 37,912 
1 Average weight of 170 pounds per cubic foot used to convert cubic feet
to short tons. 
2 Includes limestone for asphalt filler, fertilizer, flux, lime, mineral
food, other uses, and dust for coal mines 
(1967). 
Data may not add to totals shown because of independent rounding.