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Bureau of Mines / Minerals yearbook: Area reports: domestic 1978-79
Year 1978-79, Volume 2 (1978-1979)

Kebblish, William
Delaware,   pp. 129-132 PDF (359.4 KB)


Page 129

  129The Mineral Industry of 
Delaware 
This chapter has been prepared under a Memorandum of Understanding between
the Bureau of Mines, U.S. Department of the Interior, and the Delaware Geological
Survey for collecting information on all nonfuel minerals. 
By William Kebblish1 
 The value of nonfuel mineral production in Delaware was $2.5 million in
1978 and $3.3 million in 1979. Sand and gravel continued to be the most important
commodity produced. Of lesser importance were clay and magnesium compounds,
while sulfur and slag were recovered from processing of other commodities.
 Trends and Developments.—The Delaware Economic Development Council,
established in 1978, continued efforts in 1979 to attract new industry into
the State. The Pigeon Creek plant, New Castle County, funded with Federal
money, will recycle refuse and sludge. Glass and iron products will be recovered
and combustible material used as fuel 
 In 1979, the Delaware Geological Survey published a report entitled "Removal
of 
Metals From Laboratory Solutions and Landfill Leachate by Greensand Filters."
Greensands are useful for the removal of various metals from contaminated
water and the removal of heavy metals from landfill leachate. Data on the
near surface greensand deposits in the MiddletownOdessa area were collected
by the Delaware Survey in cooperation with the Federal Bureau of Mines. 
 Employment..—Delaware's mining industry employed only a limited
number
of workers. In 1978, 48 persons were employed in sand and gravel operations,
16 in clay pits, and 13 at gypsum plants, for a State total of 77 workers.
 Legislation and Government Programs—Potential mineral-related
development,
including industrial support facili 
Table l—Nonfuel mineral production in Delaware1 
1977 
1978 
1979 
Mineral 
Quantity 
Value 
~ 
Quantity 
Value 
(thousanda) 
(thousands) 
Clays 
Sand and graveL do -- - 
 Total                   
 11 
1,351 
 $7 
2,084 
 10 
1,449 
 $8 
2,468 
 11 
1,674 
 $9 
3,281 
XX 
22,091 
XX 
' 2,476 
XX 
' 3,29() 
 XX Not applicable. 
 ' Production as measured by mine shipments, sales, or marketable production
(includingconsumption by producers). ' Partial total; excludes the value
of gem stones and magnesium compounds, which must be concealed to avoid disclosing
company proprietary data. 


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