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|Title:||Rayleigh-wave velocity determinations for Cottonwood Creek Project, California|
|Authors:||United States. Army. Corps of Engineers. Sacramento District.|
Curro, Joseph R.
|Keywords:||Cottonwood Creek Project|
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-80-1.|
Abstract: A surface vibratory investigation was conducted at two proposed damsites (Dutch Gulch and Tehama) in connection with the Cottonwood Creek Project near Redding, California. From this investigation, Rayleigh-wave (R-wave) velocities (analogous to shear-wave velocities) were determined for the materials at the sites to a depth of approximately 50 ft. Results of the investigation conducted at the Dutch Gulch site indicated that R-wave velocities generally fell within an 850- to 1000-fps range and were relatively constant (for a particular test location) with depth. Minimum and maximum velocity values determined at the site were 550 and 1130 fps at depths of 8 and 26 ft, respectively. At the Tehama site, R-wave velocities generally ranged from 1000 to 1300 fps and exhibited a slightly increasing trend from near ground surface to about a 20-ft depth where they become relatively constant with depth. Minimum and maximum velocity values determined at the site were 630 and 1450 fps at depths of 6 and 27 ft, respectively.
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