Bureau of Mines / Minerals yearbook: Area reports: domestic 1978-79
Year 1978-79, Volume 2 (1978-1979)
Delaware, pp. 129-132 PDF (359.4 KB)
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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