Cordell Hull Lock on Cumberland River in Carthage, Tennessee, is subject to temporary operations. The lock will be available, upon appointment, every Friday and Sunday from July 2 through Sept. 26, 2021. All lockages must be scheduled at least 48 hours in advance. On Fridays, lockages are between 8 a.m. and 2 p.m. On Sundays (and federal holidays), operations may start at 7 a .m. and be initiated by 11 a.m. No lock operation will occur in excessive wind or inclement weather. No lock operation will occur if there is rough water below the lower lock gate. Lockages are limited to vessel with maximum beam (width) of 40 feet. Call 615-735-1040 for more information.