THE MINERAL INDUSTRY OF PENNSYLVANIA 
681 
 
of $16.05 per ton at the ovens ($0.25 per ton more than in 1966); beehive
coke average $14.21 per ton at the ovens ($0.70 per ton more than in 1966).
Twelve oven-coke plants carbonized 26.2 million tons of coal and had 70.22
percent yield of coke from coal. Eight bee- 
* hive-coke plants (one more than in 1966), carbonized 574,000 tons of coal
and had 60.19 percent coke yield. 
 Of the total oven-coke output, producing companies used 16.7 million tons
in blast furnaces and 22,000 tons for other purposes and sold 732,000 tons
to blastfurnace plants, foundries, other industrial plants, and to retail
dealers for residential heating both in and out of the State. Of the total
beehive-coke production, 278,000 tons was sold to blast furnaces, 16,000
tons to foundries, and 52,000 tons to other industrial plants. Of the 14.5
million tons of oven and beehive coke distributed in Pennsylvania, 14.1 million
tons went to blast-furnace plants, 239,000 tons to foundries, 175,000 tons
to other industrial plants, and less than 500 tons for residential heating.

 Breeze recovered at coke plants totaled 773,000 tons at an average of $6.46
per ton. Coke breeze yield per tons of coal was 2.94 percent. Of the breeze
used by producers 549,000 tons was used in agglomerating plants, 81,000 tons
in steam plants, and 94,000 tons for other industrial uses. Breeze sold on
the open market totaled 120,000 tons at an average of $7.33 per ton. Stocks
of breeze on hand at yearend totaled 210,000 tons. 
 Coal chemicals produced at the ovencoke plants included 243,000 tons of
ammonium sulfate equivalent, 234.3 million gallons of tar, and 76.8 million
gallons of crude light-oil, from which were derived 42.5 million gallons
of benzene, 10.3 million gallons of toluene, 3.3 million gallons of xylene,
and 1.7 million gallons of solvent naphtha. 
 
 Natural Gas Liquids.—Production of natural gas liquids totaled 2.9
million galions of which 1.2 million gallons was natural gasoline and cycle
products and 1.7 million gallons was liquefied petroleum (LP) gases and ethane.
Natural gasoline and cycle products were listed at 6.6 cents per gallon (5.8
cents in 1966) and LP gases and ethane at 6.5 cents per gallon (same as in
1966). Natural gas proc 
essing plants were located in Elk, Venango, Warren, and Greene Counties.
Estimated proved recoverable reserves of natural gas liquids totaled 1.2
million (42-gallon) barrels at yearend. 
 Underground-storage capacity for LP gas was 1.1 million barrels located
in four mined granite caverns in Delaware County and a mined shale cavern
in Westmoreland County. An inground frozen earth cavity is being constructed
in Philadelphia County by Philadelphia Gas Works (completion 1970) with a
capacity of 1.2 million barrels. 
 
 Peat.—Production of peat totaled 41,560 tons from eight operations
located in five counties. Sales totaled 39,500 tons at an average price of
$11.06 per ton. Of the total sold, 71 percent was reported as humus; 86 percent
was sold in bulk for $11.03 per ton, and 14 percent packaged for $11.25 per
ton. Peat producers reported working on deposits totaling 348 acres (average
depth of 29 feet) with 2 million tons of reserves. Luzerne County was the
leading producer; other counties producing peat were Erie, Lackawanna, Lawrence,
and Wayne. 
 
 Petroleum and Natural Gas.—Crude oil production totaled 4.4 million
42-gallon barrels, a 1-percent increase over that of 1966. The average price
per barrel increased $0.04 to $4.49. The number of producing ~il and condensate
wells decreased from 48,000 in 1966 to 42,000 in 1967. Estimated proved recoverable
reserves of crude oil at yearend totaled 63.3 million barrels, a decrease
of 9.1 million barrels from that of yearend 1966. Operating capacity of 13
crude oil refineries totaled 620,500 barrels per calendar day. 
 Natural gas production totaled 90 billion cubic feet, (Bcf), a 1-percent
decrease from that of 1966. Average wellhead value was 28.1 cents per 1,000
cubic feet. Productive gas wells decreased from 17,800 in 1966 to 17,300
in 1967. Estimated proved recoverable reserves of natural gas including underground
storage at yearend totaled 1,392 Bcf, an increase of 41 Bcf from that of
yearend 1966. Natural gas held in underground reservoirs for storage purposes
at yearend 1967 totaled 490 Bcf, a decrease of 11 Bcf. Total natural gas
underground reservoir capacity at yearend totaled 696 Bcf.