Measurement of bridge scour at the SR-32 crossing of the Sacramento River at Hamilton City, California, 1987-92
By: J. C. Blodgett and Carroll D. Harris
Edited by: Shen Hsieh WenSu S.T.Wen Feng
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Abstract
A study of the State Route 32 crossing of the Sacramento River near Hamilton City, California, is being made to determine those channel and bridge factors that contribute to scour at the site. Three types of scour data have been measured-channel bed (natural) scour, constriction (general) scour, and local (bridge-pier induced) scour. During the years 1979-93, a maximum of 3.4 ft of channel bed scour, with a mean of 1.4 ft, has been measured. Constriction scour, which may include channel bed scour, has been measured at the site nine times during the years 1987-92. The calculated amount of constriction scour ranged from 0.2 to 3.0 ft, assuming the reference is the mean bed elevation. Local scour was measured four times at the site in 1991 and 1992 and ranged from -2.1 (fill) to 11.6 ft , with the calculated amounts dependent on the bed reference elevation and method of computation used. Surveys of the channel bed near the bridge piers indicate the horizontal location of lowest bed elevation (maximum depth of scour) may vary at least 17 ft between different surveys at the same pier and most frequently is located downstream from the upstream face of the pier.
Suggested Citation
Blodgett, J.C., Harris, C.D., 1993, Measurement of bridge scour at the SR-32 crossing of the Sacramento River at Hamilton City, California, 1987-92, in Proceedings - National Conference on Hydraulic Engineering, no. pt 2, San Francisco, CA, USA, 25 July 1993 through 30 July 1993, p. 1860-1865.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Measurement of bridge scour at the SR-32 crossing of the Sacramento River at Hamilton City, California, 1987-92 |
| ISBN | 0872629201 |
| Issue | pt 2 |
| Year Published | 1993 |
| Language | English |
| Publisher | Publ by ASCE |
| Publisher location | New York, NY, United States |
| Larger Work Title | Proceedings - National Conference on Hydraulic Engineering |
| First page | 1860 |
| Last page | 1865 |
| Conference Title | Proceedings of the National Conference on Hydraulic Engineering |
| Conference Location | San Francisco, CA, USA |
| Conference Date | 25 July 1993 through 30 July 1993 |