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Page 4401, results 110001 - 110025

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Measurement of scour-depth near bridge piers
J. V. Skinner
1986, Water-Resources Investigations Report 85-4106
River-bed scour is a major source of damage to bridge piers and bridge abutments. When scour depth exceeds design limits, the supporting material around the footings is washed away and the structure becomes unstable. Equations for predicting scour-depth show a significant lack of agreement so portable equipment for measuring scour...
Evaluation of coal-mining impacts using numerical classification of benthic invertebrate data from streams draining a heavily mined basin in eastern Tennessee
A.D. Bradfield
1986, Water-Resources Investigations Report 85-4289
Coal-mining impacts on Smoky Creek, eastern Tennessee were evaluated using water quality and benthic invertebrate data. Data from mined sites were also compared with water quality and invertebrate fauna found at Crabapple Branch, an undisturbed stream in a nearby basin. Although differences in water quality constituent concentrations and physical habitat...
Relationship of nonpoint-source discharges, streamflow, and water quality in the Galena River basin, Wisconsin
S. J. Field
1986, Water-Resources Investigations Report 85-4214
Four small tributaries of the Galena River Madden Branch tributary, Pats Creek, Apple River, and Madden Branch that drain nonpoint agricultural sources and that receive no significant point-source discharges were monitored from October 1980 through September 1982 to determine water quality. Streamflow in the tributaries during the 1981 water year was...
Bibliography on ground water in glacial-aquifer systems in the Northeastern United States
Denise A. Wiltshire, Forest P. Lyford, A.J. Cohen
1986, Circular 972
The U.S. Geological Survey established the Regional Aquifer-System Analysis (RASA) program to evaluate major interconnected aquifers or groups of aquifers that share similar characteristics within a region. One of the objectives of the Northeastern Glacial RASA is to provide information on the occurrence and quality of ground water in glacial...
Geochemical survey of the Little Frog Roadless Area, Polk County, Tennessee
E. R. Force, D. F. Siems
1986, Miscellaneous Field Studies Map 1338-B
The Wilderness Act (Public Law 88-577, September 3, 1964) and related acts require the U.S. Geological Survey and the U.S. Bureau of Mines to survey certain areas on Federal lands to determine the mineral values, if any, that may be present.  Results must be made available to the public and...
Geohydrologic data along the Salt-Gila aqueduct of the central Arizona project in Maricopa and Pinal counties, Arizona
B.L. Wallace, B.M. Wrege, H. H. Schumann
1986, Open-File Report 86-236
The U.S. Geological Survey, in cooperation with the U.S. Bureau of Reclamation, is conducting an investigation of land subsidence and earth fissures along the Salt-Gila aqueduct to identify hazard zones and to provide design data for the Central Arizona Project aqueducts. Thirty-three test holes were drilled along the Salt-Gila aqueduct...