Home Skip to main content

Research Reports
Report Details

Title:Evaluation of SRICOS Method on Cohesive Soils in South Dakota
Authors:Francis C. K. Ting, Allen L. Jones, and Ryan J. Larsen
University:South Dakota State University
Publication Date:Jan 2010
Report #:MPC-08-195
Project #:MPC-280
TRID #:01155069
Keywords:bridge design, cohesive soils, hydraulics, scour
Type:Research Report – MPC Publications



The SRICOS (Scour Rates In COhesive Soils) method had been proposed as an alternative design methodology for predicting scour at bridges founded in cohesive soils. As the new method can produce substantial savings in bridge construction costs at cohesive soil sites, it is important that South Dakota Department of Transportation (SDDOT) evaluates the method carefully for use in bridge design. This research project compared the predictions of the SRICOS method for pier scour with measured scour at three bridge sites in South Dakota and examined the technical issues involved in using the method.

This research recommends that SDDOT: (1) use the SRICOS method as a supporting tool in evaluating bridges for scour, (2) continue to monitor current and future research to observe new improvements, (3) conduct workshops to train design engineers in using the method; (4) acquire testing equipment to measure soil erodibility; (5) establish a procedure for collecting scour data immediately after major floods to verify future improvements; and (6) conduct research to improve predictions of hydraulics of bridge waterways and the effect of large floods on time rate of scour.

How to Cite

Ting, Francis C. K., Allen L. Jones, and Ryan J. Larsen. Evaluation of SRICOS Method on Cohesive Soils in South Dakota, MPC-08-195. North Dakota State University - Upper Great Plains Transportation Institute, Fargo: Mountain-Plains Consortium, 2010.

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050