Don Getty, project manager for the Kentucky Lock Addition Project gives an overview about three of 10 partially placed concrete shells on the riverbed of the Tennessee River. These shells that will be placed over the next year and will be part of the downstream cofferdam and the permanent lock wall for the Kentucky Lock Addition Project to members from the Marine Board members from the Transportation Research Board of The National Academies of Sciences, Engineering during a tour of the Kentucky Lock Addition Project at Kentucky Lake on the Tennessee River in Grand Rivers, Ky.