Alcatraz Citadel Bay and California State could be taken under its fold was thwarted. Alcatraz was officially designated as a military prison on August 27, 1861. In March 1863, when there was a threat that the San Francisco Bay would be captured by the Confederates, the schooner, which was to carry out the operation set sail; the U.S. Navy prevented the schooner from moving out and captured the crew along with ammunition and 15 confederates who were hiding in the galleys of the ship. Consequent to this, the importance of Alcatraz increased, more and more confederates and civilians were arrested for reasons
Alcatraz Wharf and sank in deep water off the wharf in the early 1910s. Her crew of forty-two men escaped by jumping into the bay and swimming ashore. Seismic rehabilitation of the wharf occurred in the early 2000s. The retrofit to the existing wharf and its facilities consisted of concrete demolition, excavation, and installation of tiebacks. Reinforced steel and concrete were added to a new deck. Work was also done on the deteriorated piles under the wharf deck.David Finney is the youngest person to swim the South End Rowing Club Alcatraz Swim when he swam it in 2015 at ten years old.