Shoaling Conditions in Lock and Dam 13 Pool, Arkansas River. Hydraulic Model Investigation.

Abstract : Lock and Dam 13 is located at mile 292.8 on the Arkansas River. The dam was designed to provide a minimum depth of 9 ft to Lock and Dam 14 at mile 319.7. Following initial operation of Lock and Dam 14 in January 1971, shoaling in the upstream end of Lock and Dam 13 Pool became a chronic problem, occurring each time flows exceeded 50,000 cfs. This study was conducted to: develop a system of channel structures in the reach just downstream of Lock and Dam 14 that would appreciably reduce the required maintenance dredging without significantly increasing water-surface elevations or velocities; determine the effectiveness of overdepth and overwidth dredging in delaying the need for required maintenance dredging; and locate the optimum site for two mooring cells upstream of Lock and Dam 14.