I never knew about this . . . .
The SS Sultana was a Mississippi River steamboat paddlewheeler destroyed in an explosion on April 27, 1865. This resulted in the greatest maritime disaster in United States history. An estimated 1,800 of the 2,400 passengers were killed when three of the ship's four boilers exploded and the Sultana sank near Memphis.<1> This disaster received somewhat diminished attention, as it took place soon after the assassination of President Abraham Lincoln and during the closing weeks of the Civil War.
-snip-
At Vicksburg, Mississippi, the steamship stopped for a series of hasty repairs to the boilers and to take on more passengers. Rather than have a bad boiler replaced, a small patch repair was made to reinforce a leaking area. A section of bulged boiler plate was removed, and a patch of less thickness than the parent plate was riveted in its place.<2> This repair only took about a day, whereas to replace the boiler completely would have taken about three days.
-snip-
Most of the new passengers were Union soldiers, chiefly from Ohio and just released from Confederate prison camps such as Cahawba and Andersonville. The US government had contracted with the Sultana to transport these former prisoners of war back to their homes. With a legal capacity of only 376, the Sultana was severely overcrowded. Many of Sultana's passengers had been weakened by their incarceration and associated illnesses. Passengers were packed into every available berth, and the overflow was so severe that the decks were completely packed.
-snip-
There was a terrific explosion that sent some of the passengers on deck into the water while destroying a good portion of the ship. Hot coals scattered by the explosion soon turned the remaining superstructure into an inferno, the glare of which could be seen in Memphis.
http://en.wikipedia.org/wiki/SS_Sultana