Marmet Locks and Dam, Kanawha River, West Virginia
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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Monitoring of the new Marmet Lock, Kanawha River, WV, was performed from 2010 through 2013. The monitoring was conducted because of the many unique aspects of the new lock. The new lock project included a 1,600-feet-long, long-span, thin-walled guide wall in the upper approach and a unique filling and emptying system. The filling and emptying system has a through-the-sill intake, an inchamber longitudinal culvert system, and Stoney gate valves. The lock was monitored using time-lapse video systems and an underwater remotely operated vehicle. The purpose of this monitoring study was to determine if the project is functioning as designed and as indicated by two physical model studies that were conducted at the U.S. Army Engineer Research and Development Center. The lock culvert system experienced peak average velocities of 18 feet per second, although no adverse pressures were found. A remotely operated vehicle inspection indicated the walls of the culverts were in good condition. The Stoney gate valves are performing well and not showing any signs of unusual wear. The upstream guide wall is not being unduly stressed by tows aligning for entrance into the lock. No significant scour or deposition was found during the annual survey between 2010 and 2013. Vortex and turbulence created during filling and emptying was not adverse. Upstream trash racks beneath the miter gates should be inspected annually. Overall, the new Marmet Lock is performing satisfactorily as designed.
- Civil Engineering