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By Richard Addison, Ronald O. Cranor

Tailings dam construction and operation of Rosario Dominicana's gold/silver mine in the Dominican Republic is described. Impoundment of 8.5 kt/d of cyanide-process tailings is required in an intensive agricultural area which is also an earthquake and high rainfall zone. The earthfill embankment dam, incorporating internal gravel drains, is described together with methods of construction used. Methods of tailings transport, solution reclaim, and runoff water diversion that have evolved are discussed.

Jan 1, 1982

By A. J. Zinkl

A two-year test led to adoption of carbide insert bits at the Iron King mine. Results: greater production, lower costs, and happier miners.

Jan 4, 1951

By Mario L. Villa

During 1938, oil activities in the Argentine Republic showed a favorable balance due to the increase in crude-oil production, the incorpora- tion of new producing areas and the discovery of deeper productive horizons. Drilling was as follows:

Jan 1, 1939

By Mario L. Villa

During 1938, oil activities in the Argentine Republic showed a favorable balance due to the increase in crude-oil production, the incorpora- tion of new producing areas and the discovery of deeper productive horizons. Drilling was as follows:

Jan 1, 1939

The Keweenaw Peninsula in the Upper Peninsula of Michigan is plagued with abandoned prospectors' test pits and mine shafts, the result of exploration and operation of mines for over 100 years. The Fort Wilkins State Park in Keweenaw County alone has three open prospectors' pits within its boundaries, protected by wooden fences and maintained by the (Michigan State Conservation Department as a tourist attraction.

Jan 1, 1967

PRESIDENTS DAVID THOMAS 1871 R W RAYMOND 1872-1874 A L HOLLEY1875 ABRAM S HEWITT 1876 T STERRY HUNT 1877 ECKLEY B COXE 1878 - 1879 WILLIAM P SHINN 1880 WILLIAM METCALF 1881 RICHARD P ROTHWELL 1882 ROBERY W HUNT 1883 JAMES C, BAYLES 1884-1885 ROBERT H RICHARDS 1886 THOMAS EGLESTON 1887 WILLIAM B POTTER 1888 RICHARD PEARCE 1889 ADAM S HEWITT 1890

Jan 1, 1923

By E. Gybbon Spilsbury

From time to time, for the last quarter of a century, considerable attention has been called to the gold deposits of North Carolina and Georgia, and much capital has been expended in their development; but the existence of large areas of gold-bearing rocks in the State

Jan 1, 1884

Use of rock grinding media in a mill at Tennessee Copper Corp. was mentioned in the MINING ENGINEERING Annual Review. (February 1953, page 158). Because interest in use of self-grinding media continues high we asked F. M. Lewis, Superintendent of Concentration at Tennessee Copper, to supply more details on this trial, and of plans to expand use of rock media in their mills that grind marble. Here is what he reports.

Jan 5, 1953

As a service to its readers, MINING ENGINEERING is publishing the mineral industry portion of the 1952 list of "Accredited Undergraduate Engineering Curricula in the United States." This list, revised annually, is issued by the Education Committee of the Engineers Council for Professional Development, and covers all phases of engineering education. The AIME is actively represented on ECPD, which was jointly organized by the Founder Societies and various other groups interested in the professional recognition of engineers.

Jan 4, 1953

By G. S. Hume

Petroleum is produced in Canada in the provinces of New Brunswick, Ontario and Alberta and in the Northwest Territories. The total production, however, is relatively small in comparison with the consumption, the value of imports exceeding 40 million dollars a year. Production figures are given in Tables 1 and 2. In Turner Valley, still the largest producing gas and oil field in Canada, five wells were completed during the year. The largest of these

Jan 1, 1936

By G. S. Hume

Petroleum is produced in Canada in the provinces of New Brunswick, Ontario and Alberta and in the Northwest Territories. The total production, however, is relatively small in comparison with the consumption, the value of imports exceeding 40 million dollars a year. Production figures are given in Tables 1 and 2. In Turner Valley, still the largest producing gas and oil field in Canada, five wells were completed during the year. The largest of these

Jan 1, 1936

By William L. Horner, James A. Lewis, Marion Stekoll

THE data in this paper show a relationship between measured productivity index and certain commonly measured reservoir characteristics. Comparison is made of theoretical radial flow assuming certain drainage radii and the tentative relationship shown by these data. Among the more important measurements found to correlate with productivity index are permeability, formation thickness, oil viscosity at reservoir conditions, and formation-volume factor.

Jan 1, 1942

By K. H. Nimerick, B. E. Scott, F. J. Beafore

A unique freeze conditioning agent (FCA) which functions by forming structurally weak ice rather than suppressing the freezing point of water has been successful in alleviating frozen coal problems. Frozen coal treated with FCA has been quickly unloaded at temperatures below -17.8°C (O°F). Other applications of FCA include deicing: conveyor belts, idler, idler arms, and other moving parts that have been impeded by ice.

Jan 9, 1979

By E. A. Lawrence

The experiences of Canex Placer Ltd. in establishing vegetation on a lead-zinc tailing pond are presented, hoping others with similar challenges will be benefited. History The tailing ponds are the result of 23 years of mining and milling operations, which ceased in August 1970. Roughly 7.9 million tons of lead-zinc ore were removed in that time. The ponds are located between Salmo River and B.C. Highway 3, about 8 miles north of Nelway near the Canada-U.S. border.

Jan 1, 1975

By R. Schuhmann Jr., P. J. Ensio

John Chipman (Massachusetts Institute of Technology, Cambridge, Mass.)—The activity of FeO in silica-saturated slags shown in Table V is about 0.40 in the temperature range 1260" to 1350°C. Recent measurements by N. A. Gokeen at 1600" lead to about the same value. He finds the oxygen content of liquid iron in equilibrium with silica and ferrous silicate slags to be 0.088 pct. Under pure iron oxide slags at the same temperature, it is 0.225 pct. The ratio places the activity at 0.39.

Jan 1, 1952

By T. O. Breitling

Two significant problems In mill design are environmental control and cost reduction. Environmental control is predicted to be 5-10% of total plant costs in some parts of the U.S. Operating and design companies will assign this new "unit operation" a place in the early flow sheets. More advanced environmental control will add to both capital and operating costs, so mill designers will strive to reduce other costs.

Jan 1, 1970

J. S. UNGER,* Pittsburgh, Pa. (written discussion ?).-There is a common impression in the minds of many that forging or rolling apiece of steel not alone increases the strength but makes the steel more dense, or causes it to become heavier. I believe it is the author's aim in the paper to show that cast steel is almost as dense as forged steel. The average results obtained by him show very little difference in density, being

Jan 5, 1919

By W. B. Plank

The figures on enrollment in the engineering schools of the United States and Canada indicate that the total number of students in these schools for the current year, 1949-50, is about 10% less than it was a year ago. This year, 226,533 undergraduates and graduate students are studying engineering in the United States and Canada as compared with 249,913 students last year. These figures are taken from advance data in the Journal of Engineering Education for February 1950.

Jan 5, 1950

By Timothy P. Smirnoff

INTRODUCTION The Jones Island Inline Pump Station is a major element of the Milwaukee Metropolitan Sewerage District's (MMSD) Inline Storage Facilities Plan in Milwaukee, Wisconsin. See Figure 1. This underground 6.6 cu m/day (150 MGD) Pumping Station will be located immediately south of the existing Jones Island Treatment Plant at the confluence of the Menomonee and Kinnickinnic Rivers on the Milwaukee Bay, south of the Milwaukee River. [ ]

Jan 1, 1984

Jan 1, 1966