MARYLAND—1992  257TABLE 3 
 
MARYLAND: CONSTRUCTION SAND AND GRAVEL SOLD OR USED BY PRODUCERS IN 1992,

BY DISTRICT AND USE 
 
(Thousand short tons and thousand dollars) 
 
Use 
Distri 
 
Quantity 
ct P 
 
Value 
Distri 
Ct 2 
District 
3 
 
 
 
Quantity 
Value 
Quantity 
Value 
Concrete aggregates and concrete products~ 
— 
 
— 
 
— 
 
 
— 
 
 
—:: 
— 
— 
 
 
— 
 
 
 
 
— 
 
 
— 
 
 
—:: 
— 
4,963 
2,058 
1,212 
953 
9,187 
8,334 
32,081 
8,41 1 
9,151 
6,321 
55,963 
55,963 
1,165 
 
282 
 
 
— 1,355 
 
2,802 
 
2,542 
5,020 
 
431 
 
 
 — 7,883 
 
13,334 
 
13,334 
Asphaltic concrete aggregates and road base materials' 
 
 
 
 
 
 
Unspecified:4 
 
 
 
 
 
 
Actual 
 
 
 
 
 
 
Estimated 
 
 
 
 
 
 
Total' 
 
 
 
 
 
 
Total6 7 
 
 
 
 
 
 
' Withheld to avoid disclosing company proprietaiydata; included with Distzict
2. 2lncludes plaster and gunite sands. 
3lncludes fill, road and other stabilization (cement and lime), and other
miscellaneous uses. 
4lncludes production reported without a breakdown by end use and estimates
for nonrespondents. 
' Data may not add to totals shown because of independent rounding. 
6One metric ton is equal to 1,000 kilogram or 2,204.62 pounds. To convert
short tons into metric tons. multiply short tons by 0.907185. 
7Total quantity and total value in thousand metiic tons and thousand dollars.

 
 
shale at 7 pits, dimension stone at 5 quarries, cement at 3 plants, and industrial
sand at 1 pit. Output of crushed stone, cement, and sand and gravel accounted
for more than 95 % of the State's total value of nonfuel mineral production
of $339 million. 
 
 Sand and Gravel.—Construction sand and gravel production is surveyed
by the USBM for even-numbered years only; data for odd-numbered years are
based on annual company estimates. This chapter contains actual data for
1990 and 1992 and estimates for 1991. 
 Maryland construction sand and gravel statistics are compiled by geographical
districts as depicted in the State map. Table 3 presents end-use statistics
for Maryland's three districts. 
 In 1992, sand and gravel production of about 12 million short tons was the
lowest reported since 1983. For the year, 48 companies operated 67 pits in
12 of Maryland's 23 counties. Prince Georges, Charles, and Cecil were the
top three counties in production. Sand and gravel used for concrete aggregate
accounted for about one-half of the total sales or about $35 million. The
average price per ton (plant f.o.b.) has remained stable during the past
3 years, ranging between $5.60 and $5.78 per short ton. 
 During the year, one of the State's producers joined with a construction
materials distributor in a recycling venture. Campbell Sand & Gravel
Co. 
and Patuxent Materials Co. formed Campat Inc. in Crofton. Investment in the
plant was about $1 million and included a new crusher, conveyor system, and
screening equipment. Operations of this type are becoming more widespread
because of diminishing landfill space, particularly in areas of high population.

Disposal of a tractor-trailer load of construction material debris at a landfill
costs about $325 in the Anne Arundel County area. Campat officials claim
that the cost of 2-inch stone delivered in that area was about $3.00 per
ton higher in price than the recycled material. 
 
 Stone.—Stone production is surveyed by the USBM for odd-numbered
years
only; data for even-numbered years are based on annual company estimates.
This chapter contains estimates for 1990 and 1992 and actual data for 1991.

 Production of crushed stone in 1992 of about 23. 8 million short tons was
the lowest reported since 1984. Despite the lower output, crushed stone remained
the leading mineral commodity produced in Maryland, accounting for almost
60% of the State's value of nonfuel mineral 
production. In 1992, Maryland ranked 
21st nationally in crushed stone production. 
 
Metals 
 
 Metals discussed in this section were processed from materials received
from both foreign and domestic sources. No metallic ores were mined in Maryland.
Production and value data for these processed metals, which are not included
in table 1 , are given if available. 
 Metals were imported into Maryland primarily through the Port of Baltimore.

Iron ore imports, which dropped by about 
25% from 1990 to 1991, rebounded in 
1992 to about 3.5 million short tons as demand for steel improved during
the second half of the year. Ferroalloy shipments from overseas continued
to decline, dropping to about 1 17,000 short tons in 1992 from 145,000 tons
in 1991 and 177,000 tons in 1990. 
 
 Aluminum.—Eastalco Aluminum Co., a subsidiary of Alumax Inc. ,
continued
to produce aluminum at its smelter near Frederick. Output in 1992 remained
about the same as that of 1991. 
 
 Copper.—.Cox Creek Refining Co.,