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Geology and mineral deposits of an area in the Departments of Antioquia and Caldas (Subzone IIB), Colombia
Tomas Feininger, Dario Barrero L., Nestor Castro, R.B. Hall
1973, Open-File Report 73-69
The Inventario Minero National (IMN), a four-year cooperative geologic mapping and mineral resources appraisal project, was accomplished under an agreement between the Republic of Colombia and the U. S. Agency for International Development from 1964 through 1969. Subzone IIB, consisting essentially of the east half of Zone comprises nearly 20,000...
Summary of seismic activity and its relation to geology and mining in the Sunnyside mining district, Carbon and Emery Counties, Utah, during 1967-1970
C. Richard Dunrud, Frank W. Osterwald, Jerome Hernandez
1973, Open-File Report 73-63
In the Sunnyside mining district, Utah, coal is mined under thick and variable overburden which is locally weakened by faults and other structural discontinuities. Stress changes and local stress concentrations produced by mining under these conditions often cause sudden and violent ruptures in the coal and surrounding rock mass. The...
Relation of channel slope to reaeration of Michigan streams
T. Ray Cummings
1973, Open-File Report 73-54
Reaeration coefficients (k2), which are rate constants for the process of oxygen absorption from the atmosphere, have been computed for Michigan's streams using an equation developed by Bennett and Rathbun (1972). Mean velocity and mean depth data, which are necessary for the computation, have been extracted from discharge measurements made...
A preliminary evaluation of regional ground-water flow in south-central Washington
A. M. La Sala Jr., G.C. Doty, F. J. Pearson Jr.
1973, Open-File Report 73-153
The characteristics of regional ground-water flow were investigated in a 4,500-square-mile region of south-central Washington, centered on the U.S. Atomic Energy Commission Hanford Reservation. The investigation is part of the Commission's feasibility study on storing high-level radioactive waste in chambers mined in basaltic rocks at a. depth of about 3,000...
A network for continuous monitoring of water quality in the Sabine River basin, Texas and Louisiana
J.F. Blakey, P.W. Skinner
1973, Open-File Report 73-25
The proposed water-quality network for the Sabine River Basin of Texas and Louisiana consists of nine monitoring stations, a central control station, a slave-central station, and a leased-line telecommunications system. This monitoring network would provide continuous transmission of water-quality data to the office of the water manager. Level I operations at...
Hydrology and sediment transport, Moanalua Valley, Oahu, Hawaii
B.L. Jones, C.J. Ewart
1973, Open-File Report 73-134
The first 2 years of intensive data collection in Moanalua Valley have resulted in some observations concerning the rainfall-runoff and rainfall-sedimentation characteristics of the basin.This initial study period has been concerned primarily with establishing a reliable hydrologic data-collection network. However, enough data have been collected to determine that rainfall within...