From http://www.navyandmarine.org/NMLHA_Maps/CivilWarNavy/CW_Guidebook.htm :

5.10.2a (May 10, 1862)
Capt. James E. Montgomery leads the Confederate River Defense Fleet (CSS General Bragg, General Sumter , General Sterling Price, General Earl Van Dorn, General M. Jeff Thompson, General Lovell, General Beauregard, and Little Rebel) in an attack on Union gunboats and mortar boats at Plum Point Bend, TN just above Ft Pillow. USS Cincinnati and Mound City were rammed and sank in the shallows, but the deep draft of the rebel ships prevented them from closing with the Yankee ships, which were soon raised and repaired.