THE MINERAL INDUSTRY OF PENNSYLVANIA 
685 
 
Table 7.—Sand and gravel sold or used by producers, by classes of operations,
and uses 
(Thousand short tons and thousand dollars) 
19 
Class of operation and use 
Quantity 
66 
 
Value 
1967 
———————~ 
Quantity Value 
Commercial operations: 
 
 
Sand: 
 
 
Molding 185 
$526 
 157 $461 
Building 5,228Paving 3,362Fire or furnace 87 
7,698 
5,183 
270 
 4,855 7,424 3,678 5,636 71 223 
Fill 20 
19 
 24 20 
 Undistributed '  1,490  Total 10,372 
 
Gravel: 
5,054 
 1,292 4,336 
 
18,750 
 10,077 18,100 
 
 
 
Building 3,005Paving 3,522Fill 328 
4,346 
5,758 
163 
 2,562 4,141 4,147 6,639 343 214 
 Ijndistributed 2  292 
  Total 7,147  Totalsand and gravel 17,519 
 
Government-and-contractor operations: 
472 
 298 441 
 
10,739 
 7,350 11,435 
 
29,489 
 17,427 29,535 
 
 
 
Sand: 
 
 
Paving 7 
10 
 
Other                                                      
 
 52 79 
Gravel: 
 
 
 Other 41  Total sand and gravel 48 
 
All operations: 
 Sand 10,379 
 Gravel 7,188  Grand total 17,567 
63 
 
 
73 
 52 79 
 
18,760 
10,802 
 10,129 18,179 7,350 11,435 
 
29,562 
 17,479 29,614 
i Includes glass, grinding and polishing, blast, engine, ground, and other
sand. 2 Includes railroad ballast, miscellaneous, and other gravel. 
 
tween 100,000 and 200,000 tons each for 
21 percent of the total tonnage; 20 percent of the operations produced between

200,000 and 500,000 tons each for 39 percent of the total tonnage; almost
3 percent of the operations produced between 
500,000 and 1 million tons each for 11 
percent of the total tonnage; and less than 
1 percent of the operations produced over 
1 million tons each for 15 percent of the 
total tonnage. 
 Of the total production, 98 percent was processed; 75 percent was trucked
to markets, and the balance was transported by railroads and waterways. 
 Operations receiving Certificates of Achievement for outstanding safety
records in the Sand and Gravel Pit Group of the 1967 Pennsylvania National
Saftey Competition were Seidle Sand and Gravel, Inc., with 30,508 man-hours
without a disabling work injury; Houdaille Construction Materials, Inc.,
with 28,355 man-hours; Tionesta Sand & Gravel, Inc., with 27,- 
644 man-hours; Mahoning Valley Sand Co., with 24,413 man-hours; Shippingport
Sand & Gravel Co., with 23,426 manhours; and Atlas Sand and Gravel, Inc.,
with 22,854 man-hours. The General Concrete Products Corp., received a Certificate
of Achievement in the Sand and Gravel Dredge Group with 30,246 man-hours
without a disabling work injury. 
 
 Sericite-Schist.—Crude sericite-schist was produced from two mines
in Adams County and processed for use as a carrier in insecticides, and as
a filler in asphalt, enamel coating, and joint cement. 
 
 Stone.—Production of stone increased 2 percent in total tonnage and
4 percent in total value from that of 1966. Crushed stone totaled 60 million
tons of which 84 percent was limestone, 7 percent basalt, 5 percent sandstone,
and the remaining 4 percent granite, miscellaneous stone, and slate. Crushed
stone was used for the fol