Riprap Protection on Navigable Waterways.

Abstract : Three separate physical model investigations concerning riprap protection in navigable waterways are reported herein. The first investigation was a site-specific study of riprap failure and repair along a reach of the Sacramento River Deep Water Ship Channel. The second study was a general investigation to address the required riprap size when placed in an environment subject to propeller wash from relatively large horsepower towboats. The third study was a site-specific study of the required riprap size in the bottom of the proposed Seabrook Lock. Towboats entering and existing the Seabrook lock are usually much smaller than those used in the general investigation. (Author)