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Bureau of Mines / Minerals yearbook 1990
Year 1990, Volume 2 (1990)

Prosser, L. J., Jr.
Maryland,   pp. [240]-245 PDF (728.1 KB)

Page 242

242  MARYLAND—199("special exceptions" for mining operations.
The ban
prevented the opening or expanding of sand and gravel operations at least
until 1991, when new regulations were expected to be adopted. 
 The ~ Maryland Geological Survey (MGS) is responsible for mineral and energy
resources investigations, which 
~ are directed through its facilities in 
~ Baltimore. Mineral resource maps for 
~ eight of nine counties on the State's 
~ Eastern Shore were completed during the 
~ year. These maps were prepared for use 
~ in land use planning. * 
 The MGS also continued work with the Minerals Management Service of the
Department of the Interior. In this project, cores from Maryland's inner
continental shelf were logged, photographed, and split into samples for analysis
of heavy minerals. 
 TheEnergy Information Administration 
published a State Coal Profile for 
Maryland.3 The State produced about 
3 million short tons of coal in 1989 from 
29 mines in Allegany and Garrett 
Industrial Minerals 
 Portland cement, construction sand and gravel, and crushed stone accounted
for $359 million or almost 97 % of Maryland's nonfuel mineral production.
Land use issues involving the question of mine development versus conservation
continued to be a major concern of the industries producing these mineral
 Other industrial minerals produced in Maryland included masonry cement,
clays, peat, dimension stone, and industrial sand. For the most part, these
industries were small, long-established, and stable operations; for these
commodities, land use conflicts were less significant. 
 Cement.—Productionofportland cement remained at about the 1 .
shortton level for the fourth consecutive year. 
The State's three cement plants again operated at almost 90 % of capacity
compared withthe U.S. average of about 76 % . About three-fourths of the
cement was used in ready-mixed concrete by the construction industry. Two
of the portland cement producers also manufactured masonry cement. 
Lehigh Portland Cement Co. received approval to open a new limestone quarry
near New Windsor for use in cement manufacture at its Union Bridge plant.
Design plans showed a 66-acre quarry to be mined to a depth of 195 feet.
The State's DNR, Water Resources Administration, approved the permit. 
Siintl and Giuvel (Consiniction).—. 
Construction sand and gravel production is surveyed by the U.S. Bureau of
Mines for even-numbered years only; data for odd-numbered years are based
on annual company estimates. This chapter contains actual data for 1988 and
1990 and estimates for 1989. 
Maryland 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 1990, sand and gravel production of 18.3 million tons was the third highest
total reported in State history. District 2, which accounted for about three-fourths
of the output, encompassed the greatest geographic area and population concentrations.
In 1990, sand and gravel was produced by 42 companies at 69 pits in 12 of
Maryland's 23 counties. Charles County led the State in output, followed
by Prince Georges and Anne Arundel Counties. Sand and gravel used for concrete
aggregates accounted for about one-half of the total sales. Since 1988, the
price of sand and gravel has increased by about 15% to $5.69 per ton. 
In Prince Georges County, Circuit Court dismissed an appeal of an exemption
to county zoning regulations that allowed Southern Maryland Sand &
Co. to mine a 360-acre site near Piscataway. 
Genstar Stone Products Co. announced plans to donate a 120-acre mine site
the Anne Arundel County Department of Recreation and Parks. Mining of sand
and gravel at the mine in Davidsonville was projected to be completed in
3 years followed by 2 years of reclamation. The county was expected to own
the land in February of 1995. 
 Stone (Crushed). —Crushed stone production is surveyed by the
Bureau of Mines for odd-numbered years only; data for even-numbered years
are based on annual company estimates. This chapter contains estimates for
1988 and 1990 and actual data for 1989. 
 PrOduction of crushed stone exceeded 30 million tons for the fourth successive
year. Crushed stone remained the State's leading mineral commodity, accounting
for 44 % of the State's value of nonfuel mineral productiQn. Nationally,
Maryland ranked 17th in crushed stone output and 15th in value. 
 No metallic ores were mined in Maryland. Metals discussed in this section
were processed from materials received from both foreign and domestic sources.
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
in 1990.~ Iron ore and magnanese ore shipments decreased in 1990 and are
discussed under Trends and Developments. Imports of ferroalloys also dropped,
from 193,000 tons to 177,000 tons. Shipments ofbauxite from overseas decreased
from 369,000 tons to 364,000 tons. 
 Aluminwn.—Eastalco Aluminum Co., a subsidiary of Alumax Inc. ,
to produce aluminum at its smelter near Frederick. 
Copper.—Mitsubishi Materials America 
~ Corp. , a subsidiary of Mitsubishi Metal 
~ Corp. of Japan, acquired an 80 % interest in Cox Creek Refining Co. Southwire
~ Co. of Carroilton, GA, owned the other 

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