Fort Alcatraz (San Francisco Bay, California)
San Francisco Bay · California · Civil War
History & Significance
Following the Treaty of Guadalupe Hidalgo (1848) and the California Gold Rush, the U.S. Army Corps of Engineers began fortifying Alcatraz Island under Zealous B. Tower in 1853, completing construction in 1859 at a cost of $87,698. The fortification was part of the Third System of fixed fortifications, though its design was markedly different from typical works in that system.
During the Civil War, Alcatraz was crucial to defense, mounting 111 cannons encircling the island at peak and serving as a war camp. As the only completed fort in San Francisco Bay, Alcatraz was responsible for defending the city, and ten thousand rifles were moved there early in the war to keep them from Confederate sympathizers.
By 1861, the fort was the military prison for the Department of the Pacific and housed Civil War prisoners of war, and starting in 1863 held private citizens accused of treason after habeas corpus was suspended. Between 1873 and 1895, 32 Native Americans were imprisoned at the citadel, including 19 Hopi men held there between January and August 1895.
In 1907, Alcatraz was renamed the Pacific Branch, U.S. Military Prison as the island's defensive role diminished. Now operated by the National Park Service's Golden Gate National Recreation Area, the former prison is being restored and maintained.
Key Facts
Map
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🧳 Visiting
What you’ll see when you visit:
- Civil War–era coastal fortification with casemates and gun emplacements
- Federal penitentiary operated 1934–1963 with restored prisoner cells and administrative areas
- Audio tour guides visitors through both military and prison history
- Views of Golden Gate Bridge and San Francisco Bay from the island
- Accessible only by official ferry from Pier 33
Sources
- https://en.wikipedia.org/wiki/Fort_Alcatraz
- https://www.nps.gov/alca/learn/historyculture/index.htm
- https://www.nps.gov/places/000/alcatraz-sally-port.htm
- https://www.nps.gov/articles/725241.htm
- https://www.nps.gov/places/3-guardhouse-and-sally-port.htm
- https://www.nps.gov/goga/learn/historyculture/upload/Statement%20of%20Significance.pdf
- https://www.militarymuseum.org/Alcatraz.html
- https://www.battlefields.org/visit/heritage-sites/golden-gate-national-recreation-area-alcatraz-island
- https://fortwiki.com/Fort_Alcatraz